10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

x    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934.

For the fiscal year ended December 31, 2014

or

o  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934.

For the transition period from                      to                     .

Commission file number 0-12508

S&T BANCORP, INC.

(Exact name of registrant as specified in its charter)

Pennsylvania	25-1434426
(State or other jurisdiction of incorporation of organization)	(I.R.S. Employer Identification No.)
800 Philadelphia Street, Indiana, PA	15701
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (800) 325-2265

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Name of each exchange on which registered
Common Stock, par value $2.50 per share	The NASDAQ Stock Market LLC (NASDAQ Global Select Market)

Securities registered pursuant to Section 12(g) of the Act: None

(Title of class)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes  o    No   x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

Yes  o    No   x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

Yes  x    No  o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (229.405 of this chapter) is not contained herein and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this form 10-K or any amendment to this form 10-K.  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes  x    No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  x	Accelerated filer  o
Non-accelerated filer  o (Do not check if a smaller reporting company)	Smaller reporting company  o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).

Yes  o    No   x

The aggregate estimated fair value of the voting and non-voting common equity held by non-affiliates of the registrant as of June 30, 2014:

Common Stock, $2.50 par value – $723,040,943

The number of shares outstanding of the issuer’s classes of common stock as of February 18, 2015:

Common Stock, $2.50 par value –29,796,397

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the definitive Proxy Statement of S&T Bancorp, Inc., to be filed pursuant to Regulation 14A for the 2015 annual meeting of shareholders to be held May 20, 2015 are incorporated by reference into Part III of this annual report on Form 10-K.

Part I
Item 1.	Business	3
Item 1A.	Risk Factors	10
Item 1B.	Unresolved Staff Comments	14
Item 2.	Properties	15
Item 3.	Legal Proceedings	15
Item 4.	Mine Safety Disclosures	15
Part II
Item 5.	Market for Registrant’s Common Equity, Related Shareholder Matters and Issuer Purchases of Equity Securities	16
Item 6.	Selected Financial Data	17
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	20
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	55
Item 8.	Financial Statements and Supplementary Data	56
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosures	116
Item 9A.	Controls and Procedures	116
Item 9B.	Other Information	116
Part III
Item 10.	Directors, Executive Officers and Corporate Governance	117
Item 11.	Executive Compensation	117
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	117
Item 13.	Certain Relationships and Related Transactions, and Director Independence	117
Item 14.	Principal Accountant Fees and Services	117
Part IV
Item 15.	Exhibits, Financial Statement Schedules	118
	Signatures	121

2

PART I

Item 1.  BUSINESS

General

S&T Bancorp, Inc., or S&T (also referred to below as “we”, “us” or “our”), including, on a consolidated basis with our subsidiaries where appropriate, was incorporated on March 17, 1983 under the laws of the Commonwealth of Pennsylvania as a bank holding company and has three wholly owned subsidiaries, S&T Bank, 9th Street Holdings, Inc. and STBA Capital

Trust I. We also own a one-half interest in Commonwealth Trust Credit Life Insurance Company, or CTCLIC. We are registered as a financial holding company with the Board of Governors of the Federal Reserve System, or the Federal Reserve Board, under the Bank Holding Company Act of 1956, as amended, or the BHCA. As of December 31, 2014, we had approximately $5.0 billion in assets, $3.9 billion in loans, $3.9 billion in deposits and our shareholders’ equity was $608.4 million.

S&T Bank is a full service bank with its main office at 800 Philadelphia Street, Indiana, Pennsylvania, providing services to its customers through offices located in Allegheny, Armstrong, Blair, Butler, Cambria, Centre, Clarion, Clearfield, Indiana, Jefferson, Washington and Westmoreland counties of Pennsylvania. We also have two loan production offices, or LPOs, in Ohio, with our most recent LPO established in central Ohio on March 24, 2014. On June 18, 2014, we opened a new branch with a team of experienced banking professionals in State College, Pennsylvania. On October 29, 2014 we entered into an agreement to acquire Integrity Bancshares, Inc. We expect to complete the transaction in the first quarter of 2015, after satisfaction of customary closing conditions, including regulatory approvals and the approval of the shareholders of Integrity Bancshares, Inc. S&T Bank deposits are insured by the Federal Deposit Insurance Corporation, or FDIC, to the maximum extent provided by law.

S&T Bank has three wholly owned operating subsidiaries: S&T Insurance Group, LLC, S&T Bancholdings, Inc. and Stewart Capital Advisors, LLC. S&T Insurance Group, LLC, through its subsidiaries, offers a variety of insurance products. S&T Bancholdings, Inc. is an investment company. Stewart Capital Advisors, LLC, is a registered investment advisor that manages private investment accounts for individuals and institutions and advises the Stewart Capital Mid Cap Fund.

We have three reportable operating segments including Community Banking, Wealth Management and Insurance. Our Community Banking segment offers services which include accepting time and demand deposits, originating commercial and consumer loans, and providing letters of credit and credit card services. The Wealth Management segment offers brokerage services, serves as executor and trustee under wills and deeds, guardian and custodian of employee benefits and other trust services, as well as is a registered investment advisor that manages private investment accounts for individuals and institutions. Total Wealth Management assets under management and administration were approximately $2.0 billion at December 31, 2014. The Insurance segment includes a full-service insurance agency offering commercial property and casualty insurance, group life and health coverage, employee benefit solutions and personal insurance lines.

Refer to the financial statements and Part II, Item 8, Note 23 of this Form 10-K for further details pertaining to our operating segments.

Employees

As of December 31, 2014, we had 945 full-time equivalent employees.

Access to United States Securities and Exchange Commission Filings

All of our reports filed electronically with the United States Securities and Exchange Commission, or the SEC, including this Annual Report on Form 10-K for the fiscal year ended December 31, 2014, or the Report, our prior annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and our annual proxy statements, as well as any amendments to those reports, are accessible at no cost on our website at www.stbancorp.com under Financial Information,

SEC Filings. These filings are also accessible on the SEC’s website at www.sec.gov. You may read and copy any material we file with the SEC at the SEC’s Public Reference Room at 100 F Street, NE, Washington, D.C. 20549. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The charters of the Audit Committee, the Compensation and Benefits Committee and the Nominating and Corporate Governance Committee, the Complaints Regarding Accounting, Internal Accounting Controls or Auditing Matters Policy, or the Whistleblower Policy, the Code of Conduct for the CEO and CFO, the General Code of Conduct and the Shareholder Communications Policy are also available at www.stbancorp.com under Corporate Governance.

3

Item 1.  BUSINESS -- continued

Supervision and Regulation

General

S&T and S&T Bank are each extensively regulated under federal and state law. The following describes certain aspects of that regulation and does not purport to be a complete description of all regulations that affect S&T and S&T Bank or all aspects of any regulation discussed here.

To the extent statutory or regulatory provisions are described, the description is qualified in its entirety by reference to the particular statutory or regulatory provisions. Proposals to change the laws and regulations governing the banking industry are frequently raised in Congress, in state legislatures and before the various bank regulatory agencies. The likelihood and timing of any changes and the impact such changes might have on S&T or S&T Bank is impossible to determine with any certainty.

Any change in applicable laws or regulations, or in the way such laws or regulations are interpreted by regulatory agencies or courts, may have a material impact on our business, operations and earnings.

S&T

We are a bank holding company subject to regulation under the BHCA and the examination and reporting requirements of the Federal Reserve Board. Under the BHCA, a bank holding company may not directly or indirectly acquire ownership or control of more than five percent of the voting shares or substantially all of the assets of any additional bank, or merge or consolidate with another bank holding company, without the prior approval of the Federal Reserve Board. We have maintained a passive ownership position in Allegheny Valley Bancorp, Inc. (14.3 percent) pursuant to approval from the Federal Reserve Board.

As a bank holding company, we are expected under statutory and regulatory provisions to serve as a source of financial and managerial strength to our subsidiary bank. A bank holding company is also expected to commit resources, including capital and other funds, to support its subsidiary bank.

We elected to become a financial holding company under the BHCA in 2001 and thereby engage in a broader range of financial activities than are permissible for traditional bank holding companies. In order to maintain our status as a financial holding company, we must remain “well-capitalized” and “well-managed” and the depository institutions controlled by us must remain “well-capitalized,” “well-managed” (as defined in federal law) and have at least a “satisfactory” Community Reinvestment Act ("CRA") rating. Refer to Part II, Item 8, Note 22 Regulatory Matters, of this Report for information concerning the current capital ratios of S&T and S&T Bank. No prior regulatory approval is required for a financial holding company with total consolidated assets less than $50 billion to acquire a company, other than a bank or savings association, engaged in activities that are financial in nature or incidental to activities that are financial in nature, as determined by the Federal Reserve Board, unless the total consolidated assets to be acquired exceed $10 billion. The BHCA identifies several activities as “financial in nature” including, among others, securities underwriting; dealing and market making; sponsoring mutual funds and investment companies; insurance underwriting and sales agency; investment advisory activities; merchant banking activities and activities that the Federal Reserve Board has determined to be closely related to banking. Banks may also engage in, subject to limitations on investment, activities that are financial in nature, other than insurance underwriting, insurance company portfolio investment, real estate development and real estate investment, through a financial subsidiary of the bank, if the bank is “well-capitalized,” “well-managed” and has at least a “satisfactory” CRA rating.

If S&T or S&T Bank ceases to be “well-capitalized” or “well-managed,” we will not be in compliance with the requirements of the BHCA regarding financial holding companies or requirements regarding the operation of financial subsidiaries by insured banks.

If a financial holding company is notified by the Federal Reserve Board of such a change in the ratings of any of its subsidiary banks, it must take certain corrective actions within specified time frames. Furthermore, if S&T Bank was to receive a CRA rating of less than “satisfactory,” then we would be prohibited from engaging in certain new activities or acquiring companies engaged in certain financial activities until the rating is raised to “satisfactory” or better.

We are presently engaged in nonbanking activities through the following five entities:

• 9th Street Holdings, Inc. was formed in June 1988 to hold and manage a group of investments previously owned by S&T Bank and to give us additional latitude to purchase other investments.

• S&T Bancholdings, Inc. was formed in August 2002 to hold and manage a group of investments previously owned by S&T Bank and to give us additional latitude to purchase other investments.

• CTCLIC is a joint venture with another financial institution, acting as a reinsurer of credit life, accident and health insurance policies sold by S&T Bank and the other institution. S&T Bank and the other institution each have ownership interests of 50 percent in CTCLIC.

• S&T Insurance Group, LLC distributes life insurance and long-term disability income insurance products. During 2001, S&T Insurance Group, LLC and Attorneys Abstract Company, Inc. entered into an agreement to form S&T Settlement

4

Item 1.  BUSINESS -- continued

Services, LLC, or STSS, with respective ownership interests of 55 percent and 45 percent. STSS is a title insurance agency servicing commercial customers. During 2002, S&T Insurance Group, LLC expanded into the property and casualty insurance business with the acquisition of S&T-Evergreen Insurance LLC.

• Stewart Capital Advisors, LLC was formed in August 2005 and is a registered investment advisor that manages private investment accounts for individuals and institutions and advises the Stewart Capital Mid Cap Fund.

S&T Bank

As a Pennsylvania-chartered, FDIC-insured commercial bank, S&T Bank is subject to the supervision and regulation of the Pennsylvania Department of Banking and Securities, or PADBS, and the FDIC. We are also subject to various requirements and restrictions under federal and state law, including requirements to maintain reserves against deposits, restrictions on the types, amount and terms and conditions of loans that may be granted and limits on the types of other activities in which S&T Bank may engage and the investments it may make.

In addition, S&T Bank is subject to affiliate transaction rules in Sections 23A and 23B of the Federal Reserve Act that limit the amount of transactions between itself and S&T or S&T’s nonbank subsidiaries. Under these provisions, transactions between a bank and its parent company or any single nonbank affiliate generally are limited to 10 percent of the bank subsidiary’s capital and surplus, and with respect to all transactions with affiliates, are limited to 20 percent of the bank subsidiary’s capital and surplus. Loans and extensions of credit from a bank to an affiliate generally are required to be secured by eligible collateral in specified amounts. The Dodd-Frank Act Wall Street Reform and Consumer Protection Act, or Dodd-Frank Act, expands the affiliate transaction rules to broaden the definition of affiliate and to apply to securities borrowing or lending, repurchase or reverse repurchase agreements and derivatives activities that we may have with an affiliate, as well as to strengthen collateral requirements and limit Federal Reserve exemptive authority. Also, the definition of “extension of credit” for transactions with executive officers, directors and principal shareholders was expanded to include credit exposure arising from a derivative transaction, a repurchase or reverse repurchase agreement and a securities lending or borrowing transaction. These expansions became effective July 21, 2012. These provisions have not had a material effect on S&T or S&T Bank.

Insurance of Accounts; Depositor Preference

The deposits of S&T Bank are insured up to applicable limits per insured depositor by the FDIC. The Dodd-Frank Act codified FDIC deposit insurance coverage per separately insured depositor for all account types at $250,000.

As an FDIC-insured bank, S&T Bank is subject to FDIC insurance assessments, which are imposed based upon the risk the institution poses to the Deposit Insurance Fund, or DIF. Under this assessment system, risk is defined and measured using an institution’s supervisory ratings with other risk measures, including financial ratios. The current total base assessment rates on an annualized basis range from 2.5 basis points for certain “well-capitalized,” “well-managed” banks, with the highest ratings, to 45 basis points for institutions posing the most risk to the DIF. The FDIC may raise or lower these assessment rates on a quarterly basis based on various factors to achieve a reserve ratio, which the Dodd-Frank Act has mandated to be no less than 1.35 percent of insured deposits.

In February 2011, the FDIC Board of Directors adopted a final rule, Deposit Insurance Assessment Base, Assessment Rate Adjustments, Dividends, Assessment Rates and Large Bank Pricing Methodology. This final rule redefined the deposit insurance assessment base to equal average consolidated total assets minus average tangible equity as required by the Dodd-Frank Act, altered assessment rates, implemented the Dodd-Frank Act’s DIF dividend provisions and revised the risk-based assessment system for all large insured depository institutions (those with at least $10.0 billion in total assets). Many of the changes were made as a result of provisions of the Dodd-Frank Act that were intended to shift more of the cost of raising the reserve ratio from institutions with less than $10.0 billion in assets (such as S&T Bank) to the larger banks. Except for the future assessment rate schedules, all changes went into effect April 1, 2011 and has resulted in lower FDIC expense. In addition to DIF assessments, the FDIC makes a special assessment to fund the repayment of debt obligations of the Financing Corporation, or FICO. FICO is a government-sponsored entity that was formed to borrow the money necessary to carry out the closing and ultimate disposition of failed thrift institutions by the Resolution Trust Corporation in the 1990s. The FICO assessment rate for the first quarter of 2015 is 0.600 basis points on an annualized basis.

Under federal law, deposits and certain claims for administrative expenses and employee compensation against insured depository institutions are afforded a priority over other general unsecured claims against such an institution, including federal funds and letters of credit, in the liquidation or other resolution of such an institution by a receiver. Such priority creditors would include the FDIC.

Capital

The Federal Reserve Board and FDIC have issued substantially similar risk-based and leverage capital rules applicable to banking organizations they supervise. At December 31, 2014, both S&T and S&T Bank met the applicable regulatory capital

5

Item 1.  BUSINESS -- continued

requirements. S&T’s Tier 1 risk-based capital ratio was 12.34 percent, total risk-based capital ratio was 14.27 percent and leverage ratio was 9.80 percent. S&T Bank’s Tier 1 risk-based capital, total risk-based capital and leverage ratios were 10.76 percent, 12.68 percent, and 8.53 percent.

In July 2013 the federal banking agencies issued a final rule to implement Basel III (which were agreements reached in July 2010 by the international oversight body of the Basel Committee on Banking Supervision to require more and higher-quality capital) as well as the minimum leverage and risk-based capital requirements of the Dodd-Frank Act. The final rule establishes a comprehensive capital framework, and went into effect on January 1, 2015, for smaller banking organizations such as S&T and S&T Bank. It introduces a common equity Tier 1 risk-based capital ratio requirement of 4.50 percent, increases the minimum Tier 1 risk-based capital ratio to 6.00 percent, and requires a leverage ratio of 4.00 percent for all banks. Common equity Tier 1 capital consists of common stock instruments that meet the eligibility criteria in the rule, retained earnings, accumulated other comprehensive income and common equity Tier 1 minority interest. The rule also requires a banking organization to maintain a capital conservation buffer composed of common equity Tier 1 capital in an amount greater than 2.50 percent of total risk-weighted assets beginning in 2019. The capital conservation buffer will be phased in beginning in 2016, at 25 percent, increasing to 50 percent in 2017, 75 percent in 2018 and 100 percent in 2019 and beyond. As a result, starting in 2019, a banking organization must maintain a common equity Tier 1 risk-based capital ratio greater than 7.00 percent, a Tier 1 risk-based capital ratio greater than 8.50 percent and a Total risk-based capital ratio greater than 10.50 percent; otherwise, it will be subject to restrictions on capital distributions and discretionary bonus payments. By 2019, when the new rule is fully phased in, the minimum capital requirements plus the capital conservation buffer will exceed the regulatory capital ratios required for an insured depository institution to be well-capitalized under prompt corrective action law, described below. To be well-capitalized, an insured bank must have a common equity Tier 1 risk-based capital ratio of at least 6.50 percent, a Tier 1 risk-based capital ratio of at least 8.00 percent, a total risk-based capital ratio of at least 10.00 percent, and a leverage ratio of 5.00 percent. The rule also disqualifies certain financial instruments from inclusion in regulatory capital and requires more deductions from capital.

The new regulatory capital rule also revises the calculation of risk-weighted assets. It includes a new framework under which the risk weight will increase for most credit exposures that are 90 days or more past due or on nonaccrual, high-volatility commercial real estate loans and certain equity exposures. It also includes changes to the credit conversion factors of off-balance sheet items, such as the unused portion of a loan commitment.

Federal regulators periodically propose amendments to the regulatory capital rules and the related regulatory framework and consider changes to the capital standards that could significantly increase the amount of capital needed to meet applicable standards. The timing of adoption, ultimate form and effect of any such proposed amendments cannot be predicted.

Payment of Dividends

S&T is a legal entity separate and distinct from its banking and other subsidiaries. A substantial portion of our revenues consist of dividend payments we receive from S&T Bank. S&T Bank, in turn, is subject to federal and state laws and regulations that limit the amount of dividends it can pay to S&T. In addition, both S&T and S&T Bank are subject to various general regulatory policies relating to the payment of dividends, including requirements to maintain adequate capital above regulatory minimums. The Federal Reserve Board has indicated that banking organizations should generally pay dividends only if (i) the organization’s net income available to common shareholders over the past year has been sufficient to fully fund the dividends and (ii) the prospective rate of earnings retention appears consistent with the organization’s capital needs, asset quality and overall financial condition. Thus, under certain circumstances based upon our financial condition, our ability to declare and pay quarterly dividends may require consultation with the Federal Reserve Board and may be prohibited by applicable Federal Reserve Board guidance.

Other Safety and Soundness Regulations

There are a number of obligations and restrictions imposed on bank holding companies such as us and our depository institution subsidiary by federal law and regulatory policy. These obligations and restrictions are designed to reduce potential loss exposure to the FDIC’s deposit insurance fund in the event an insured depository institution becomes in danger of default or is in default. Under current federal law, for example, the federal banking agencies possess broad powers to take prompt corrective action to resolve problems of insured depository institutions. The extent of these powers depends upon whether the institution in question is “well-capitalized,” “adequately capitalized,” “undercapitalized,” “significantly undercapitalized” or “critically undercapitalized,” as defined by the law. As of December 31, 2014, S&T Bank was classified as “well-capitalized.” New definitions of these categories, as set forth in the federal banking agencies’ final rule to implement Basel III and the minimum leverage and risk-based capital requirements of the Dodd-Frank Act, became effective as of January 1, 2015. To be well-capitalized, an insured depository institution must have a common equity Tier 1 risk-based capital ratio of at least 6.50 percent, a Tier 1 risk-based capital ratio of at least 8.00 percent, a total risk-based capital ratio of at least 10.00 percent and a

6

Item 1.  BUSINESS -- continued

leverage ratio of at least 5.00 percent. To be adequately capitalized, an insured depository institution must have a common equity Tier 1 risk-based capital ratio of at least 4.50 percent, a Tier 1 risk-based capital ratio of at least 6.00 percent, a total risk-based capital ratio of at least 8.00 percent and a leverage ratio of at least 4.00 percent. The classification of depository institutions is primarily for the purpose of applying the federal banking agencies’ prompt corrective action provisions and is not intended to be and should not be interpreted as a representation of overall financial condition or prospects of any financial institution.

The federal banking agencies’ prompt corrective action powers (which increase depending upon the degree to which an institution is undercapitalized) can include, among other things, requiring an insured depository institution to adopt a capital restoration plan which cannot be approved unless guaranteed by the institution’s parent company; placing limits on asset growth and restrictions on activities, including restrictions on transactions with affiliates; restricting the interest rates the institution may pay on deposits; prohibiting the payment of principal or interest on subordinated debt; prohibiting the holding company from making capital distributions without prior regulatory approval; and, ultimately, appointing a receiver for the institution. For example, only a “well-capitalized” depository institution may accept brokered deposits without prior regulatory approval.

The federal banking agencies have also adopted guidelines prescribing safety and soundness standards relating to internal controls and information systems, internal audit systems, loan documentation, credit underwriting, interest rate exposure, asset growth, fees and compensation and benefits. In general, the guidelines require appropriate systems and practices to identify and manage specified risks and exposures. The guidelines prohibit excessive compensation as an unsafe and unsound practice and characterize compensation as excessive when the amounts paid are unreasonable or disproportionate to the services performed by an executive officer, employee, director or principal shareholder. In addition, the agencies have adopted regulations that authorize, but do not require, an agency to order an institution that has been given notice by an agency that it is not in compliance with any of such safety and soundness standards to submit a compliance plan. If, after being so notified, an institution fails to submit an acceptable compliance plan, the agency must issue an order directing action to correct the deficiency and may issue an order directing other actions of the types to which an “undercapitalized” institution is subject under the prompt corrective action provisions described above.

Regulatory Enforcement Authority

The enforcement powers available to federal banking agencies are substantial and include, among other things and in addition to other powers described herein, the ability to assess civil money penalties, to issue cease-and-desist or removal orders and to initiate injunctive actions against banks and bank holding companies and “institution affiliated parties,” as defined in the Federal Deposit Insurance Act. In general, these enforcement actions may be initiated for violations of laws and regulations, as well as engagement in unsafe or unsound practices. Other actions or inactions may provide the basis for enforcement action, including misleading or untimely reports filed with regulatory authorities.

At the state level, the PADBS also has broad enforcement powers over S&T Bank, including the power to impose fines and other penalties and to appoint a conservator or receiver.

Interstate Banking and Branching

The BHCA currently permits bank holding companies from any state to acquire banks and bank holding companies located in any other state, subject to certain conditions, including certain nationwide and state-imposed deposit concentration limits. In addition, because of changes to law made by the Dodd-Frank Act, S&T Bank may now establish de novo branches in any state to the same extent that a bank chartered in that state could establish a branch.

Community Reinvestment and Consumer Protection Laws

In connection with its lending activities, S&T Bank is subject to a number of federal laws designed to protect borrowers and promote lending to various sectors of the economy and population. These include, among other laws, the Equal Credit Opportunity Act, the Truth-in-Lending Act, the Home Mortgage Disclosure Act, the Real Estate Settlement Procedures Act, the Fair Credit Reporting Act and the CRA. In addition, rules of the Consumer Financial Protection Bureau pursuant to federal law require disclosure of privacy policies to consumers and in some circumstances, allow consumers to prevent the disclosure of certain personal information to nonaffiliated third parties.

The CRA requires the appropriate federal banking agency, in connection with its examination of a bank, to assess the bank’s record in meeting the credit needs of the communities served by the bank, including low and moderate-income neighborhoods. Furthermore, such assessment is required of any bank that has applied, among other things, to merge or consolidate with or acquire the assets or assume the liabilities of an insured depository institution, or to open or relocate a branch office. In the case of a bank holding company (including a financial holding company) applying for approval to acquire a bank or bank holding company, the Federal Reserve Board will assess the record of each subsidiary bank of the applicant

7

Item 1.  BUSINESS -- continued

bank holding company in considering the application. Under the CRA, institutions are assigned a rating of “outstanding,” “satisfactory,” “needs to improve” or “unsatisfactory.” S&T Bank was rated “satisfactory” in its most recent CRA evaluation.

Anti-Money Laundering Rules

S&T Bank is subject to the Bank Secrecy Act, its implementing regulations and other anti-money laundering laws and regulations, including the USA Patriot Act of 2001. Among other things, these laws and regulations require S&T Bank to take steps to prevent the bank from being used to facilitate the flow of illegal or illicit money, to report large currency transactions and to file suspicious activity reports. S&T Bank is also required to develop and implement a comprehensive anti-money laundering compliance program. Banks must also have in place appropriate “know your customer” policies and procedures. Violations of these requirements can result in substantial civil and criminal sanctions. In addition, provisions of the USA Patriot Act of 2001 require the federal financial institution regulatory agencies to consider the effectiveness of a financial institution’s anti-money laundering activities when reviewing bank mergers and bank holding company acquisitions.

Government Actions and Legislation

The Dodd-Frank Act is significantly changing the current bank regulatory structure and affecting the lending, deposit, investment, trading and operating activities of financial institutions and their holding companies, including S&T and S&T Bank. The Dodd-Frank Act contains a number of provisions intended to strengthen capital. Refer to Capital within Part I, Item 1 for additional information.

The Dodd-Frank Act requires various federal agencies to adopt a broad range of new rules and regulations and to prepare numerous studies and reports for Congress. The federal agencies are given significant discretion in drafting the implementing rules and regulations, and consequently, many of the details and much of the impact of the Act depend on the actions of regulatory agencies. The Dodd-Frank Act also contains provisions that expand the insurance assessment base and increase the scope of deposit insurance coverage.

Among other provisions, the SEC has enacted rules, required by the Dodd-Frank Act, giving stockholders a non-binding vote on executive compensation and so-called “golden parachute” payments and allowing certain stockholders to nominate their own candidates for election as directors using a company’s proxy materials. The legislation also directs the federal financial institution regulatory agencies to promulgate rules prohibiting excessive compensation being paid to financial institution executives. In addition, in December of 2013, federal regulators adopted final regulations regarding the so-called Volcker Rule established in the Dodd-Frank Act. The Volcker Rule generally prohibits banks and their affiliates from engaging in proprietary trading and investing in and sponsoring certain unregistered investment companies (generally covering hedge funds and private equity funds, subject to certain exemptions). The rules are complex and it is not clear how they will be implemented over time. However, S&T does not currently anticipate that they will have a material effect on S&T Bank or its affiliates, because we do not engage in the prohibited activities.

The Dodd-Frank Act also created the Consumer Financial Protection Bureau, or CFPB, that took over rulemaking responsibility on July 21, 2011 for the principal federal consumer financial protection laws, such as the Truth in Lending Act, the Equal Credit Opportunity Act, the Real Estate Settlement Procedures Act and the Truth in Savings Act, among others. Institutions that have assets of $10.0 billion or less, such as S&T Bank, will continue to be supervised in this area by their state and primary federal regulators (in the case of S&T Bank, the FDIC). The Act also gives the CFPB expanded data collection powers for fair lending purposes for both small business and mortgage loans, as well as expanded authority to prevent unfair, deceptive and abusive practices. The consumer complaint function also has been consolidated into the CFPB with respect to the institutions it supervises. The CFPB established an Office of Community Banks and Credit Unions, with a mission to ensure that the CFPB incorporates the perspectives of small depository institutions into the policy-making process, communicates relevant policy initiatives to community banks and credit unions, and works with community banks and credit unions to identify potential areas for regulatory simplification. In addition, the Dodd-Frank Act required the Federal Reserve Board to adopt a rule addressing interchange fees applicable to debit card transactions. This rule, Regulation II, effective October 1, 2011, does not apply to a bank that, together with its affiliates, has less than $10.0 billion in assets.

In January 2013, the CFPB issued a series of final rules related to mortgage loan origination and mortgage loan servicing. In particular, on January 10, 2013, the CFPB issued a final rule implementing the ability-to-repay and qualified mortgage (QM) provisions of the Truth in Lending Act, as amended by the Dodd-Frank Act (the “QM Rule”). The ability-to-repay provision requires creditors to make reasonable, good-faith determinations that borrowers are able to repay their mortgage loans before extending the credit based on a number of factors and consideration of financial information about the borrower from reasonably reliable third-party documents. Under the Dodd-Frank Act and the QM Rule, loans meeting the definition of “qualified mortgage” are entitled to a presumption that the lender satisfied the ability-to-repay requirements. The presumption is a conclusive presumption/safe harbor for prime loans meeting the QM requirements, and a rebuttable presumption for higher-priced/subprime loans meeting the QM requirements. The definition of a “qualified mortgage” incorporates the statutory

8

Item 1.  BUSINESS -- continued

requirements, such as not allowing negative amortization or terms longer than 30 years. The QM Rule also adds an explicit maximum 43 percent debt-to-income ratio for borrowers if the loan is to meet the QM definition, though some mortgages that meet government-sponsored enterprise, or GSE, Federal Housing Administration, or FHA, and Veterans Affairs, or VA, underwriting guidelines may, for a period not to exceed seven years, meet the QM definition without being subject to the 43 percent debt-to-income limits. The QM Rule became effective on January 10, 2014. These rules did not have a material impact on our mortgage business.

The federal agencies responsible for implementing the provisions of the Dodd-Frank Act have issued a substantial number of rules. More rules will be issued. Not all of the Dodd-Frank Act provisions and their implementing regulations apply to banks the size of S&T Bank. Federal and state regulatory agencies consistently propose and adopt changes to their regulations or change the manner in which existing regulations are applied. We cannot assess the ultimate impact of the Act on S&T or S&T Bank at this time, including the extent to which it could increase costs or limit our ability to pursue business opportunities in an efficient manner, or otherwise adversely affect our business, financial condition and results of operations. Nor can we predict the impact or substance of other future legislation or regulation. However, it is expected that they, at a minimum, will increase our operating and compliance costs.

In 2012, Pennsylvania enacted three bills known as the “Banking Law Modernization Package.” The bills became effective on December 24, 2012. The overall goal of the Banking Law Modernization Package was to modernize the banking laws of Pennsylvania and reduce regulatory burden at the state level.

We cannot predict the substance or impact of pending or future legislation or regulation, or the application thereof, although enactment of any proposed legislation could affect how S&T and S&T Bank operate and could significantly increase costs, impede the efficiency of internal business processes, or limit our ability to pursue business opportunities in an efficient manner, any of which could materially and adversely affect our business, financial condition and results of operations.

Competition

S&T Bank competes with other local, regional and national financial services providers, such as other financial holding companies, commercial banks, savings associations, credit unions, finance companies and brokerage and insurance firms. Some of our competitors are not subject to the same level of regulation and oversight that is required of banks and bank holding companies, and are thus able to operate under lower cost structures.

Changes in bank regulation, such as changes in the products and services banks can offer and permitted involvement in non-banking activities by bank holding companies, as well as bank mergers and acquisitions, can affect our ability to compete with other financial services providers. Our ability to do so will depend upon how successfully we can respond to the evolving competitive, regulatory, technological and demographic developments affecting our operations.

Our market area includes Pennsylvania and the contiguous states of Ohio, West Virginia, New York and Maryland. The majority of our commercial and consumer loans are made to businesses and individuals in this market area resulting in a geographic concentration. Our market area has a high density of financial institutions, some of which are significantly larger institutions with greater financial resources than us, and many of which are our competitors to varying degrees. Our competition for loans comes principally from commercial banks, savings associations, mortgage banking companies, credit unions and other financial service companies. Our most direct competition for deposits has historically come from commercial banks, savings banks and credit unions. We face additional competition for deposits from non-depository competitors such as the mutual fund industry, securities and brokerage firms and insurance companies. Because larger competitors have advantages in attracting business from larger corporations, we do not generally attempt to compete for that business. Instead, we concentrate our efforts on attracting the business of individuals, and small and medium-size businesses. We consider our competitive advantages to be customer service and responsiveness to customer needs, the convenience of banking offices and hours, access to electronic banking services and the availability and pricing of our products and services. We emphasize personalized banking and the advantage of local decision-making in our banking business.

The financial services industry is likely to become more competitive as further technological advances enable more companies to provide financial services on a more efficient and convenient basis. Technological innovations have lowered traditional barriers to entry and enabled many companies to compete in financial services markets. Many customers now expect a choice of banking options for the delivery of services, including traditional banking offices, telephone, internet, mobile, ATMs, self-service branches, and/or in-store branches. These delivery channels are offered by traditional banks and savings associations, as well as credit unions, brokerage firms, asset management groups, finance and insurance companies, internet-based companies, and mortgage banking firms.

9

Item 1A.  RISK FACTORS

Investments in our common stock involve risk. The following discussion highlights the risks that we believe are material to S&T, but does not necessarily include all risks that we may face.

The market price of our common stock may fluctuate significantly in response to a number of factors.

Our quarterly and annual operating results have varied significantly in the past and could vary significantly in the future, which makes it difficult for us to predict our future operating results. Our operating results may fluctuate due to a variety of factors, many of which are outside of our control, including the changing U.S. economic environment and changes in the commercial and residential real estate market, any of which may cause our stock price to fluctuate. If our operating results fall below the expectations of investors or securities analysts, the price of our common stock could decline substantially. Our stock price can fluctuate significantly in response to a variety of factors including, among other things:

• volatility of stock market prices and volumes in general;

• changes in market valuations of similar companies;

• changes in conditions in credit markets;

• changes in accounting policies or procedures as required by the Financial Accounting Standards Board, or FASB, or other regulatory agencies;

• legislative and regulatory actions (including the impact of the Dodd-Frank Act and related regulations) subjecting us to additional regulatory oversight which may result in increased compliance costs and/or require us to change our business model;

• government intervention in the U.S. financial system and the effects of and changes in trade and monetary and fiscal policies and laws, including the interest rate policies of the Federal Reserve Board;

• additions or departures of key members of management;

• fluctuations in our quarterly or annual operating results; and

• changes in analysts’ estimates of our financial performance.

Risks Related to Credit

Our ability to assess the credit-worthiness of our customers may diminish, which may adversely affect our results of operations.

We take credit risk by virtue of making loans and extending loan commitments and letters of credit. Our exposure to credit risk is managed through the use of consistent underwriting standards that emphasize “in-market” lending while avoiding highly leveraged transactions as well as excessive industry and other concentrations. Our credit administration function employs risk management techniques to ensure that loans adhere to corporate policy and problem loans are promptly identified. There can be no assurance that such measures will be effective in avoiding undue credit risk. If the models and approaches we use to select, manage and underwrite our consumer and commercial loan products become less predictive of future charge-offs (due, for example, to rapid changes in the economy, including the unemployment rate), our credit losses may increase.

The value of the collateral used to secure our loans may not be sufficient to compensate for the amount of an unpaid loan and we may be unsuccessful in recovering the remaining balance from our customers.

Decreases in real estate values, particularly with respect to our commercial lending and mortgage activities, could adversely affect the value of property used as collateral for our loans and our customers’ ability to repay these loans, which in turn could impact our profitability. Repayment of our commercial loans is often dependent on the cash flow of the borrower, which may become unpredictable. If the value of the assets, such as real estate, serving as collateral for the loan portfolio were to decline materially, a significant part of the loan portfolio could become under-collateralized. If the loans that are secured by real estate become troubled when real estate market conditions are declining or have declined, in the event of foreclosure, we may not be able to realize the amount of collateral that was anticipated at the time of originating the loan. This could result in higher charge-offs which could have a material adverse effect on our operating results and financial condition.

Changes in the overall credit quality of our portfolio can have a significant impact on our earnings.

Like other lenders, we face the risk that our customers will not repay their loans. We reserve for losses in our loan portfolio based on our assessment of inherent credit losses. This process, which is critical to our financial results and condition, requires complex judgment including our assessment of economic conditions, which are difficult to predict. Through a periodic review of the loan portfolio, management determines the amount of the allowance for loan loss, or ALL, by considering historical losses combined with qualitative factors including general and regional economic conditions, asset quality trends, loan policy and underwriting and changes in loan concentrations and collateral values. The amount of future losses is susceptible to changes in economic, operating and other conditions, including changes in interest rates, which may be beyond our control. We may underestimate our inherent losses and fail to hold an ALL sufficient to account for these losses. Incorrect assumptions

10

could lead to material underestimates of inherent losses and an inadequate ALL. As our assessment of inherent losses changes, we may need to increase or decrease our ALL, which could impact our financial results and profitability.

Our loan portfolio is concentrated in western Pennsylvania, and our lack of geographic diversification increases our risk profile.

The regional economic conditions in western Pennsylvania affect the demand for our products and services as well as the ability of our customers to repay their loans and the value of the collateral securing these loans. We are less able than a larger institution to spread the risks of unfavorable local economic conditions across a large number of diversified economies. A significant decline in the regional economy caused by inflation, recession, unemployment or other factors could negatively affect our customers, the quality of our loan portfolio and the demand for our products and services. Any sustained period of increased payment delinquencies, foreclosures or losses caused by adverse market or economic conditions in our market area could adversely affect the value of our assets, revenues, results of operations and financial condition. Moreover, we cannot give any assurance that we will benefit from any market growth or favorable economic conditions in our primary market area.

Our loan portfolio has a significant concentration of commercial real estate loans.

The majority of our loans are to commercial borrowers. The commercial real estate, or CRE, segment of our loan portfolio is typically more impacted by economic fluctuations. CRE lending typically involves higher loan principal amounts, and the repayment of these loans is generally dependent, in large part, on sufficient income from the properties securing the loans to cover operating expenses and debt service. Because payments on loans secured by CRE often depend upon the successful operation and management of the properties, repayment of these loans may be affected by factors outside the borrower’s control, including adverse conditions in the real estate market or the economy. Additionally, we have a number of significant credit exposures to commercial borrowers, and while the majority of these borrowers have numerous projects that make up the total aggregate exposure, if one or more of these borrowers default or have financial difficulties, we could experience higher credit losses, which could adversely impact our financial condition and results of operations.

Risks Related to Our Operations

An interruption or security breach of our information systems may result in financial losses or in a loss of customers.

We depend upon data processing, communication and information exchange on a variety of computing platforms and networks, including the internet. We have experienced cyber security incidents in the past, which we did not deem material, and may experience them in the future. We believe that we have implemented appropriate measures to mitigate potential risks to our technology and our operations from these information technology disruptions. However, we cannot be certain that all of our systems are entirely free from vulnerability to attack, despite safeguards we have instituted. The occurrence of any failures, interruptions or security breaches of our information systems could disrupt our continuity of operations or result in the disclosure of sensitive, personal customer information which could have a material adverse impact on our business, financial condition and results of operations through damage to our reputation, loss of customer business, remedial costs, additional regulatory scrutiny or exposure to civil litigation and possible financial liability. Losses arising from such a breach could materially exceed the amount of insurance coverage we have, which could adversely affect our results of operation.

We rely on third-party providers and other suppliers for a number of services that are important to our business. An interruption or cessation of an important service by any third party could have a material adverse effect on our business.

We are dependent for the majority of our technology, including our core operating system, on third party providers. If these companies were to discontinue providing services to us, we may experience significant disruption to our business. If any of our third party service providers experience financial, operational or technological difficulties, or if there is any other disruption in our relationships with them, we may be required to locate alternative sources of such services. We are dependent on these third-party retailers securing their information systems, over which we have no control, and a breach of their information systems could result in the disclosure of sensitive, personal customer information, which could have a material adverse impact on our business through damage to our reputation, loss of customer business, remedial costs, additional regulatory scrutiny or exposure to civil litigation and possible financial liability. Assurance cannot be provided that we could negotiate terms with alternative service sources that are as favorable or could obtain services with similar functionality as found in existing systems without the need to expend substantial resources, if at all, thereby resulting in a material adverse impact on our business and results of operations.

11

Risks Related to Interest Rates and Investments

Our net interest income could be negatively affected by interest rate changes which may adversely affect our financial condition.

Our results of operations are largely dependent on net interest income, which is the difference between the interest and fees earned on interest-earning assets and the interest paid on interest-bearing liabilities. There may be mismatches between the maturity and repricing of our assets and liabilities that could cause the net interest rate spread to compress, depending on the level and type of changes in the interest rate environment. Interest rates could remain at historical low levels causing rate spread compression over an extended period of time. Interest rates are highly sensitive to many factors that are beyond our control, including general economic conditions and the policies of various governmental agencies. In addition, some of our customers often have the ability to prepay loans or redeem deposits with either no penalties, or penalties that are insufficient to compensate us for the lost income. A significant reduction in our net interest income will adversely affect our business and results of operations. If we are unable to manage interest rate risk effectively, our business, financial condition and results of operations could be materially harmed.

Declines in the value of investment securities held by us could require write-downs, which would reduce our earnings.

In order to diversify earnings and enhance liquidity, we own both debt and equity instruments of government agencies, municipalities and other companies. We may be required to record impairment charges on our investment securities if they suffer a decline in value that is considered other-than-temporary. Additionally, the value of these investments may fluctuate depending on the interest rate environment, general economic conditions and circumstances specific to the issuer. Volatile market conditions may detrimentally affect the value of these securities, such as through reduced valuations due to the perception of heightened credit or liquidity risks. Changes in the value of these instruments may result in a reduction to earnings and/or capital, which may adversely affect our results of operations and financial condition.

Risks Related to Our Business Strategy

Our strategy includes growth plans through organic growth and by means of acquisitions, which includes growth within our current footprint and growth through market expansion. Our financial condition and results of operations could be negatively affected if we fail to grow or fail to manage our growth effectively.

We intend to continue pursuing a growth strategy through, organic growth and by means of acquisitions, both within our current footprint and market expansion. In addition to our acquisition of Integrity Bancshares, Inc., which we expect to complete in the first quarter of 2015, we continue to evaluate acquisition opportunities as another source of growth. We cannot give assurance that we will be able to expand our existing market presence, or successfully enter new markets or that any such expansion will not adversely affect our results of operations. Failure to manage our growth effectively could have a material adverse effect on our business, future prospects, financial condition or results of operations and could adversely affect our ability to successfully implement our business strategy.

Our failure to find suitable acquisition candidates, or successfully bid against other competitors for acquisitions, could adversely affect our ability to fully implement our business strategy. If we are successful in acquiring other entities, the process of integrating such entities, including Integrity Bancshares, Inc., will divert significant management time and resources. We may not be able to integrate efficiently or operate profitably Integrity Bancshares, Inc. or any other entity we may acquire. We may experience disruption and incur unexpected expenses in integrating acquisitions. These failures could adversely impact our future prospects and results of operation.

We are subject to competition from both banks and non-banking companies.

The financial services industry is highly competitive, and we encounter strong competition for deposits, loans and other financial services in our market area. Our principal competitors include commercial banks of all types, finance companies, credit unions, mortgage brokers, insurance agencies, trust companies and various sellers of investments and investment advice. Many of our non-bank competitors are not subject to the same degree of regulation that we are and have advantages over us in providing certain services. Additionally, many of our competitors are significantly larger than we are and have greater access to capital and other resources. Failure to compete effectively for deposit, loan and other financial services customers in our markets could cause us to lose market share, slow our growth rate and have an adverse effect on our financial condition and results of operations.

We may be required to raise capital in the future, but that capital may not be available or may not be on acceptable terms when it is needed.

12

We are required by federal regulatory authorities to maintain adequate capital levels to support operations. New regulations to implement Basel III and the Dodd-Frank Act require us to have more capital. While we believe we currently have sufficient capital, if we cannot raise additional capital when needed, we may not be able to meet these requirements. Also our ability to further expand our operations through organic growth, which includes growth within our current footprint and growth through market expansion may be adversely affected. Our ability to raise additional capital is dependent on capital market conditions at that time and on our financial performance and outlook.

Risks Related to Regulatory Compliance and Legal Matters

Legislation enacted in response to market and economic conditions may significantly affect our operations, financial condition and earnings.

The Dodd-Frank Act was enacted as a major reform in response to the financial crisis that began in the last decade. The Dodd-Frank Act increases regulation and oversight of the financial services industry, and imposes restrictions on the ability of institutions within the industry to conduct business consistent with historical practices, including aspects such as capital requirements, affiliate transactions, compensation, consumer protection regulations and mortgage regulation, among others. It is not clear what impact the Dodd-Frank Act and the numerous implementing regulations will ultimately have on the financial markets or on the U.S. banking and financial services industries and the broader U.S. and global economies. They may increase our costs of regulatory compliance and of doing business and otherwise affect our operations, and will likely result in additional costs and a diversion of management’s time from other business activities, any of which may adversely impact our results of operations, liquidity or financial condition.They also may significantly affect our business strategy, the markets in which we do business, the markets for and value of our investments and our ongoing operations, costs and profitability.

Our deposit insurance premiums may increase in the future, which could have a material adverse impact on our future earnings and financial condition.

The FDIC insures deposits at FDIC-insured depository institutions, including S&T Bank. The FDIC charges insured depository institutions premiums to maintain the Deposit Insurance Fund, or DIF, at a specific level. The Dodd-Frank Act increased the minimum target DIF ratio from 1.15 percent of estimated insured deposits to 1.35 percent of estimated insured deposits. The FDIC must seek to achieve the 1.35 percent ratio by September 30, 2020. Insured institutions with assets of $10 billion or more are supposed to fund the increase.

The FDIC has issued regulations to implement these provisions of the Dodd-Frank Act. It has, in addition, established a higher reserve ratio of 2 percent as a long-term goal beyond what is required by statute. There is no implementation deadline for the 2 percent ratio. The FDIC may increase the assessment rates or impose additional special assessments in the future to keep the DIF at or above the statutory minimum target. Any increase in our FDIC premiums could have an adverse effect on the Bank’s profits and financial condition. Refer to Supervision and Regulation within Part I, Item 1 of this Report for additional information.

Future governmental regulation and legislation could limit our growth.

We are subject to extensive state and federal regulation, supervision and legislation that govern nearly every aspect of our operations. The regulations are primarily intended to protect depositors, customers and the banking system as a whole, not shareholders. Failure to comply with applicable regulations could lead to penalties and damage to our reputation. Furthermore, as shown through the Dodd-Frank Act, the regulatory environment is constantly undergoing change and the impact of changes to laws, the rapid implementation of regulations, the interpretation of such laws or regulations or other actions by existing or new regulatory agencies could make regulatory compliance more difficult or expensive, and thus could affect our ability to deliver or expand services, or it could diminish the value of our business. The ramifications and uncertainties of the recent increase in government intervention in the U.S. financial system could also adversely affect us. Refer to Supervision and Regulation within Part I, Item 1 of this Report for additional information.

Negative public opinion could damage our reputation and adversely impact our earnings and liquidity.

Reputational risk, or the risk to our business, earnings, liquidity and capital from negative public opinion, could result from our actual or alleged conduct in a variety of areas, including legal and regulatory compliance, lending practices, corporate governance, litigation, ethical issues or inadequate protection of customer information. We are dependent on third-party providers for a number of services that are important to our business. Refer to the risk factor titled, “We rely on third-party providers and other suppliers for a number of services that are important to our business. An interruption or cessation of an important service by any third party could have a material adverse effect on our business” for additional information. A failure by any of these third-party service providers could cause a disruption in our operations, which could result in negative public opinion about us or damage to our reputation. We expend significant resources to comply with regulatory requirements, and the

13

failure to comply with such regulations could result in reputational harm or significant legal or remedial costs. Damage to our reputation could adversely affect our ability to retain and attract new customers and adversely impact our earnings and liquidity.

We may be a defendant from time to time in a variety of litigation and other actions, which could have a material adverse effect on our financial condition and results of operations.

From time to time, customers and others make claims and take legal action pertaining to the performance of our responsibilities. Whether customer claims and legal action related to the performance of our responsibilities are founded or unfounded, if such claims and legal actions are not resolved in a manner favorable to us, they may result in significant expenses, attention from management and financial liability. Any financial liability or reputational damage could have a material adverse effect on our business, which, in turn, could have a material adverse effect on our financial condition and results of operations.

Risks Related to Liquidity

We rely on a stable core deposit base as our primary source of liquidity.

We are dependent for our funding on a stable base of core deposits. Our ability to maintain a stable core deposit base is a function of our financial performance, our reputation and the security provided by FDIC insurance, which combined, gives customers confidence in us. If any of these items are damaged or come into question, the stability of our core deposits could be harmed.

Our ability to meet contingency funding needs, in the event of a crisis that causes a disruption to our core deposit base, is dependent on access to wholesale markets, including funds provided by the FHLB of Pittsburgh.

We own stock in the Federal Home Loan Bank, or FHLB, in order to qualify for membership in the FHLB system, which enables us to borrow on our line of credit with the FHLB that is secured by a blanket lien on a significant portion of our loan portfolio. Changes or disruptions to the FHLB or the FHLB system in general may materially impact our ability to meet short and long-term liquidity needs or meet growth plans. Additionally, we cannot be assured that the FHLB will be able to provide funding to us when needed, nor can we be certain that the FHLB will provide funds specifically to us, should our financial condition and/or our regulators prevent access to our line of credit. The inability to access this source of funds could have a materially adverse effect on our ability to meet our customer’s needs. Our financial flexibility could be severely constrained if we were unable to maintain our access to funding or if adequate financing is not available at acceptable interest rates.

Risks Related to Owning Our Stock

Our outstanding warrant may be dilutive to holders of our common stock.

The ownership interest of the existing holders of our common stock may be diluted to the extent our outstanding warrant is exercised. The warrant will remain outstanding until 2019. The shares of common stock underlying the warrant represent approximately 1.71 percent of the shares of our common stock outstanding as of January 31, 2015 (including the shares issuable upon exercise of the warrant in total shares outstanding). The warrant holder has the right to vote any of the shares of common stock it receives upon exercise of the warrant.

Our ability to pay dividends on our common stock may be limited.

Holders of our common stock will be entitled to receive only such dividends as our Board of Directors may declare out of funds legally available for such payments. Although we have historically declared cash dividends on our common stock, we are not required to do so and our Board of Directors could reduce, suspend or eliminate our dividend at any time. Any decrease or elimination to the dividends on our common stock could adversely affect the market price of our common stock.

Item 1B.  UNRESOLVED STAFF COMMENTS

There are no unresolved SEC staff comments.

14

Item 2.  PROPERTIES

We own a building in Indiana, Pennsylvania, located at 800 Philadelphia Street, which serves as our headquarters and executive and administrative offices. Our Community Banking and Wealth Management segments are also located at our headquarters. In addition, we own a building in Indiana, Pennsylvania that serves as additional administrative offices. We lease two buildings in Indiana, Pennsylvania; one that houses both our data processing and technology center as well as one of our branches and one that houses our training center. Community Banking has 58 locations, including 56 branches located in twelve counties in Pennsylvania, of which 40 are owned and 16 are leased, including the aforementioned building that shares space with our data center. The other two Community Banking locations include two leased loan production offices in Ohio. We lease an office to our Insurance segment in Cambria County, Pennsylvania. The Insurance segment leases one additional office, and has staff located within the Community Banking offices in Indiana, Jefferson, Washington and Westmoreland counties. Wealth Management leases two offices, one in Allegheny County, Pennsylvania and one in Westmoreland County, Pennsylvania. Wealth Management also has several staff located within the Community Banking offices to provide their services to our retail customers. Our operating leases and the one capital lease for Community Banking, Wealth Management and Insurance expire at various dates through the year 2054 and generally include options to renew. For additional information regarding the lease commitments, refer to Part II, Item 8, Note 9 Premises and Equipment in the Notes to Consolidated Financial Statements.

Item 3.  LEGAL PROCEEDINGS

The nature of our business generates a certain amount of litigation which arises in the ordinary course of business. However, in management’s opinion, there are no proceedings pending that we are a party to or our property is subject to that would be material in relation to our financial condition or results of operations. In addition, no material proceedings are pending nor are known to be threatened or contemplated against us by governmental authorities or other parties.

Item 4.  MINE SAFETY DISCLOSURES

Not applicable.

15

PART II

Item 5.  MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED SHAREHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Stock Prices and Dividend Information

Our common stock is listed on the NASDAQ Global Select Market System or NASDAQ, under the symbol STBA. The range of sale prices for the years 2014 and 2013 is detailed in the table below and is based upon information obtained from NASDAQ. As of the close of business on January 31, 2015, we had 3,041 shareholders of record. Dividends paid by S&T are primarily provided from S&T Bank’s dividends to S&T. The payment of dividends by S&T Bank to S&T is subject to the restrictions described in Part II, Item 8, Note 5 Dividend and Loan Restrictions of this Report. The cash dividends declared per share are shown below.

	Price Range of Common Stock				Cash Dividends Declared
2014	Low		High
Fourth quarter	$	23.07	$	29.28	$	0.18
Third quarter	23.26		25.86		0.17
Second quarter	22.21		25.20		0.17
First quarter	21.17		25.43		0.16
2013
Fourth quarter	$	23.18	$	26.41	$	0.16
Third quarter	19.74		24.98		0.15
Second quarter	17.14		19.98		0.15
First quarter	17.24		18.98		0.15

Certain information relating to securities authorized for issuance under equity compensation plans is set forth under the heading Equity Compensation Plan Information Update in Part III, Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

Five-Year Cumulative Total Return

The following chart compares the cumulative total shareholder return on our common stock with the cumulative total shareholder return of the NASDAQ Composite Index⁽¹⁾ and NASDAQ Bank Index⁽²⁾ assuming a $100 investment in each on December 31, 2009.

16

Item 5.  MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED SHAREHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES -- continued

	Period Ending
Index	12/31/2009	12/31/2010	12/31/2011	12/31/2012	12/31/2013	12/31/2014
S&T Bancorp, Inc.	100.00	136.75	121.99	116.45	167.83	203.26
NASDAQ Composite	100.00	118.14	117.20	137.98	193.39	222.02
NASDAQ Bank	100.00	117.98	102.18	121.26	171.81	180.25

(1) The NASDAQ Composite Index measures all NASDAQ domestic and international based common type stocks listed on the Nasdaq Stock Market.

(2) The NASDAQ Bank Index contains securities of NASDAQ-listed companies classified according to the Industry Classification Benchmark as Banks. These companies include banks providing a broad range of financial services, including retail banking, loans and money transmissions.

Item 6.  SELECTED FINANCIAL DATA

The tables below summarize selected consolidated financial data as of the dates or for the periods presented and should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations in Part II, Item 7 and the Consolidated Financial Statements and Supplementary Data in Part II, Item 8 of this Report.

CONSOLIDATED BALANCE SHEETS

	December 31,
(dollars in thousands)	2014		2013		2012		2011		2010
Total assets	$	4,964,686	$	4,533,190	$	4,526,702	$	4,119,994	$	4,114,339
Securities available-for-sale, at fair value	640,273		509,425		452,266		356,371		286,887
Loans held for sale	2,970		2,136		22,499		2,850		8,337
Portfolio loans, net of unearned income	3,868,746		3,566,199		3,346,622		3,129,759		3,355,590
Goodwill	175,820		175,820		175,733		165,273		165,273
Total deposits	3,908,842		3,672,308		3,638,428		3,335,859		3,317,524
Securities sold under repurchase agreements	30,605		33,847		62,582		30,370		40,653
Short-term borrowings	290,000		140,000		75,000		75,000		—
Long-term borrowings	19,442		21,810		34,101		31,874		29,365
Junior subordinated debt securities	45,619		45,619		90,619		90,619		90,619
Preferred stock, series A	—		—		—		—		106,137
Total shareholders’ equity	$	608,389	$	571,306	$	537,422	$	490,526	$	578,665

17

Item 6.  SELECTED FINANCIAL DATA -- continued

CONSOLIDATED STATEMENTS OF NET INCOME

	Years Ended December 31,
(dollars in thousands)	2014		2013		2012		2011		2010
Interest income	$	160,523	$	153,756	$	156,251	$	165,079	$	180,419
Interest expense	12,481		14,563		21,024		27,733		34,573
Provision for loan losses	1,715		8,311		22,815		15,609		29,511
Net Interest Income After Provision for Loan Losses	146,327		130,882		112,412		121,737		116,335
Noninterest income	46,338		51,527		51,912		44,057		47,210
Noninterest expense	117,240		117,392		122,863		103,908		105,633
Net Income Before Taxes	75,425		65,017		41,461		61,886		57,912
Provision for income taxes	17,515		14,478		7,261		14,622		14,432
Net Income	$	57,910	$	50,539	$	34,200	$	47,264	$	43,480
Preferred stock dividends and discount amortization	—		—		—		7,611		6,201
Net Income Available to Common Shareholders	$	57,910	$	50,539	$	34,200	$	39,653	$	37,279

18

Item 6.  SELECTED FINANCIAL DATA -- continued

SELECTED PER SHARE DATA AND RATIOS

Refer to page 65 Explanation of Use of Non-GAAP Financial Measures for a discussion of common return on average tangible assets, common return on average tangible common equity and the ratio of tangible common equity to tangible assets as non-GAAP financial measures.

	December 31,
	2014			2013			2012			2011			2010
Per Share Data
Earnings per common share—basic	$	1.95		$	1.70		$	1.18		$	1.41		$	1.34
Earnings per common share—diluted	1.95			1.70			1.18			1.41			1.34
Dividends declared per common share	0.68			0.61			0.60			0.60			0.60
Dividend payout ratio	34.89		%	35.89		%	50.75		%	42.44		%	44.75		%
Common book value	$	20.42		$	19.21		$	18.08		$	17.44		$	16.91
Profitability Ratios
Common return on average assets	1.22		%	1.12		%	0.79		%	0.97		%	0.90		%
Common return on average tangible assets (non-GAAP)	1.28		%	1.19		%	0.85		%	1.04		%	0.98		%
Common return on average equity	9.71		%	9.21		%	6.62		%	6.78		%	6.58		%
Common return on average tangible common equity (non-GAAP)	14.02		%	13.94		%	10.35		%	12.89		%	13.28		%
Capital Ratios
Common equity/assets	12.25		%	12.60		%	11.87		%	11.91		%	11.48		%
Tangible common equity / tangible assets (non-GAAP)	9.00		%	9.03		%	8.24		%	8.14		%	7.67		%
Tier 1 leverage ratio	9.80		%	9.75		%	9.31		%	9.17		%	11.07		%
Risk-based capital—tier 1	12.34		%	12.37		%	11.98		%	11.63		%	13.28		%
Risk-based capital—total	14.27		%	14.36		%	15.39		%	15.20		%	16.68		%
Asset Quality Ratios
Nonaccrual loans/loans	0.32		%	0.63		%	1.63		%	1.79		%	1.90		%
Nonperforming assets/loans plus OREO	0.33		%	0.64		%	1.66		%	1.92		%	2.07		%
Allowance for loan losses/loans	1.24		%	1.30		%	1.38		%	1.56		%	1.53		%
Allowance for loan losses/nonperforming loans	385		%	206		%	85		%	87		%	80		%
Net loan charge-offs/average loans	0.00		%	0.25		%	0.78		%	0.56		%	1.11		%

19

Item 6.  SELECTED FINANCIAL DATA -- continued

RECONCILIATIONS OF GAAP TO NON-GAAP RATIOS

	December 31
(dollars in thousands)	2014			2013			2012			2011			2010
Common return on average tangible assets (non-GAAP)
Net income	$	57,910		$	50,539		$	34,200		$	39,653		$	37,279
Plus: amortization of intangibles net of tax	734			1,034			1,111			1,129			1,265
Net income before amortization of intangibles	58,644			51,573			35,311			40,782			38,544
Total average assets (GAAP Basis)	4,762,363			4,505,792			4,312,538			4,072,608			4,123,455
Less: average goodwill and average other intangible assets, net of deferred tax liability	(177,881		)	(178,757		)	(175,501		)	(169,541		)	(170,716		)
Tangible average assets (non-GAAP)	$	4,584,482		$	4,327,035		$	4,137,037		$	3,903,067		$	3,952,739
Common return on average tangible assets (non-GAAP)	1.28		%	1.19		%	0.85		%	1.04		%	0.98		%
Common return on average tangible common equity (non-GAAP)
Net income	$	57,910		$	50,539		$	34,200		$	39,653		$	37,279
Plus: amortization of intangibles net of tax	734			1,034			1,111			1,129			1,265
Net income before amortization of intangibles	58,644			51,573			35,311			40,782			38,544
Total average shareholders’ equity (GAAP Basis)	596,155			548,771			516,812			585,186			566,670
Less: average goodwill, average other intangible assets and average preferred equity, net of deferred tax liability	(177,881		)	(178,757		)	(175,501		)	(268,755		)	(276,470		)
Tangible average common equity (non-GAAP)	$	418,274		$	370,014		$	341,311		$	316,431		$	290,200
Common return on average tangible common equity (non-GAAP)	14.02		%	13.94		%	10.35		%	12.89		%	13.28		%
Tangible common equity/tangible assets (non-GAAP)
Total shareholders' equity (GAAP basis)	$	608,389		$	571,306		$	537,422		$	490,526		$	578,665
Less: goodwill and other intangible assets and preferred equity, net of deferred tax liability	(177,530		)	(178,264		)	(179,211		)	(168,996		)	(276,262		)
Tangible common equity (non-GAAP)	430,859			393,042			358,211			321,530			302,403
Total assets (GAAP basis)	4,964,686			4,533,190			4,526,702			4,119,994			4,114,339
Less: goodwill and other intangible assets and preferred equity, net of deferred tax liability	(177,530		)	(178,264		)	(179,211		)	(168,996		)	(170,126		)
Tangible assets (non-GAAP)	$	4,787,156		$	4,354,926		$	4,347,491		$	3,950,998		$	3,944,213
Tangible common equity/tangible assets (non-GAAP)	9.00		%	9.03		%	8.24		%	8.14		%	7.67		%

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This section reviews our financial condition for each of the past two years and results of operations for each of the past three years. Certain reclassifications have been made to prior periods to place them on a basis comparable with the current period presentation. Some tables may include additional time periods to illustrate trends within our Consolidated Financial Statements. The results of operations reported in the accompanying Consolidated Financial Statements are not necessarily indicative of results to be expected in future periods.

20

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Important Note Regarding Forward-Looking Statements

This Annual Report on Form 10-K contains or incorporates statements that we believe are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. These statements generally relate to our financial condition, results of operations, plans, objectives, future performance or business. They usually can be identified by the use of forward-looking language such as “will likely result,” “may,” “are expected to,” “is anticipated,” “estimate,” “forecast,” “projected,” “intends to” or other similar words. You should not place undue reliance on these statements, as they are subject to risks and uncertainties, including but not limited to, those identified under Risk Factors in Part I, Item 1A of this Report, the documents incorporated by reference or other important factors disclosed in this Report and from time to time in our other filings with the Securities and Exchange Commission, or SEC. When considering these forward-looking statements, you should keep in mind these risks and uncertainties, as well as any cautionary statements we may make. Moreover, you should treat these statements as speaking only as of the date they are made and based only on information actually known to us at that time. We undertake no obligation to update publicly any forward-looking statements, whether as a result of new information, future events or otherwise.

These forward-looking statements are based on current expectations, estimates and projections about our business and beliefs and assumptions made by management. These Future Factors are not guarantees of our future performance and involve certain risks, uncertainties and assumptions, which are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or forecasted in these forward-looking statements.

Future Factors include:

• credit losses;

• cyber-security concerns, including an interruption or breach in the security of our information systems;

• rapid technological developments and changes;

• sensitivity to the interest rate environment including a prolonged period of low interest rates, a rapid increase in interest rates or a change in the shape of the yield curve;

• a change in spreads on interest-earning assets and interest-bearing liabilities;

• regulatory supervision and oversight, including Basel III required capital levels, and public policy changes, including environmental regulations;

• legislation affecting the financial services industry as a whole, and/or S&T or S&T Bank, in particular, including the effects of the Dodd-Frank Act;

• the outcome of pending and future litigation and governmental proceedings;

• increasing price and product/service competition, including new entrants;

• the ability to continue to introduce competitive new products and services on a timely, cost-effective basis;

• managing our internal growth and acquisitions;

• containing costs and expenses;

• reliance on significant customer relationships;

• the possibility that the anticipated benefits from acquisitions cannot be fully realized in a timely manner or at all, or that integrating future acquired operations will be more difficult, disruptive or costly than anticipated;

• general economic or business conditions, either nationally or regionally in western Pennsylvania and our other market areas, may be less favorable than expected, resulting in among other things, a reduced demand for credit and other services;

• deterioration of the housing market and reduced demand for mortgages;

• a deterioration in the overall macroeconomic conditions or the state of the banking industry that could warrant further analysis of the carrying value of goodwill and could result in an adjustment to its carrying value resulting in a non-cash charge to net income;

• a reemergence of turbulence in significant portions of the global financial and real estate markets that could impact our performance, both directly, by affecting our revenues and the value of our assets and liabilities and indirectly, by affecting the economy generally; and

• access to capital in the amounts, at the times and on the terms required to support our future businesses.

These are representative of the Future Factors that could affect the outcome of the forward-looking statements. In addition, such statements could be affected by general industry and market conditions and growth rates, general economic conditions, including interest rate fluctuations, and other Future Factors.

21

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Critical Accounting Policies and Estimates

Our Consolidated Financial Statements are prepared in accordance with U.S. generally accepted accounting principles, or GAAP. Application of these principles requires management to make estimates, assumptions and judgments that affect the amounts reported in the Consolidated Financial Statements and accompanying Notes. These estimates, assumptions and judgments are based on information available as of the date of the Consolidated Financial Statements; accordingly, as this information changes, the Consolidated Financial Statements could reflect different estimates, assumptions and judgments. Certain policies inherently are based to a greater extent on estimates, assumptions and judgments of management and, as such, have a greater possibility of producing results that could be materially different than originally reported.

Our most significant accounting policies are presented in Part II, Item 8, Note 1 Summary of Significant Accounting Policies in this Report. These policies, along with the disclosures presented in the Notes to Consolidated Financial Statements, provide information on how significant assets and liabilities are valued in the Consolidated Financial Statements and how those values are determined.

We view critical accounting policies to be those which are highly dependent on subjective or complex estimates, assumptions and judgments and where changes in those estimates and assumptions could have a significant impact on the Consolidated Financial Statements. We currently view the determination of the allowance for loan losses, or ALL, income taxes, securities valuation and goodwill and other intangible assets to be critical accounting policies. During 2014, we did not significantly change the manner in which we applied our critical accounting policies or developed related assumptions or estimates. We have reviewed these related critical accounting estimates and related disclosures with the Audit Committee.

Allowance for Loan Losses

Our loan portfolio is our largest category of assets on our Consolidated Balance Sheets. We have designed a systematic ALL methodology which is used to determine our provision for loan losses and ALL on a quarterly basis. The ALL represents management’s estimate of probable losses inherent in the loan portfolio at the balance sheet date and is presented as a reserve against loans in the Consolidated Balance Sheets. The ALL is increased by a provision charged to expense and reduced by charge-offs, net of recoveries. Determination of an adequate ALL is inherently subjective and may be subject to significant changes from period to period.

The methodology for determining the ALL has two main components: evaluation and impairment tests of individual loans and evaluation and impairment tests of certain groups of homogeneous loans with similar risk characteristics.

We individually evaluate all substandard and nonaccrual commercial loans greater than $0.5 million for impairment. A loan is impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement. For all troubled debt restructurings, or TDRs, regardless of size, as well as all other impaired loans, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate. Specific reserves are established based upon the following three impairment methods: 1) the present value of expected future cash flows discounted at the loan’s effective interest rate, 2) the loan’s observable market price or 3) the estimated fair value of the collateral if the loan is collateral dependent. These analyses involve a high degree of judgment in estimating the amount of loss associated with specific impaired loans, including estimating the amount and timing of future cash flows, the current estimated fair value of the loan and collateral values. Our impairment evaluations consist primarily of the fair value of collateral method because most of our loans are collateral dependent. We obtain appraisals annually on impaired loans greater than $0.5 million.

The ALL methodology for groups of homogeneous loans, known as the general reserve or reserve for loans collectively evaluated for impairment, is comprised of both a quantitative and qualitative analysis. We first apply historical loss rates to pools of loans with similar risk characteristics. Loss rates are calculated using historical charge-offs that have occurred within each pool of loans over the loss emergence period, or LEP. The LEP is an estimate of the average amount of time from the point at which a loss is incurred on a loan to the point at which the loss is confirmed. In general, the LEP will be shorter in an economic slowdown or recession and longer during times of economic stability or growth, as customers are better able to delay loss confirmation after a potential loss event has occurred.

In conjunction with our annual review of the ALL assumptions, we have updated our study of LEPs for our commercial portfolio segments using our loan charge-off history. Our study showed that the LEP for our Commercial Construction portfolio has lengthened and that our current estimated LEPs for the commercial real estate, or CRE, and commercial and industrial, or C&I, portfolio segments did not materially change. We estimate the LEP to be 3.5 years for CRE and commercial construction and 2.5 years for C&I. This is an increase from the prior LEPs of 1.5 years for commercial construction. We believe that the LEPs for the consumer portfolio segments have also lengthened as they are influenced by the same improvement in economic conditions that has impacted the commercial portfolio segments over the past two years. We therefore also lengthened the LEP assumption for the consumer portfolio to two years. This is an increase from prior LEPs of one and a half years for the consumer portfolio segment.

22

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Another key assumption is the look-back period, or LBP, which represents the historical data period utilized to calculate loss rates. We lengthened the LBP for C&I, commercial construction and the consumer loan portfolio segments in order to capture relevant historical data believed to be reflective of losses inherent in the portfolios. We use a five and one quarter years LBP for our commercial portfolio segments and a three and one quarter years LBP for our consumer portfolio segments.

After consideration of the historic loss calculations, management applies additional qualitative adjustments so that the ALL is reflective of the inherent losses that exist in the loan portfolio at the balance sheet date. Qualitative adjustments are made based upon changes in economic conditions, loan portfolio and asset quality data and credit process changes, such as credit policies or underwriting standards. The evaluation of the various components of the ALL requires considerable judgment in order to estimate inherent loss exposures.

The changes made to the ALL assumptions were applied prospectively and did not result in a material change to the total ALL. Lengthening the LEP does increase the historical loss rates and therefore the quantitative component of the ALL. We believe this makes the quantitative component of the ALL more reflective of inherent losses that exist within the loan portfolio, which resulted in a decrease in the qualitative component of the ALL. The ALL at December 31, 2014 reflects these changes within the C&I, commercial construction and consumer portfolio segments.

At December 31, 2014, approximately 83 percent of the ALL related to the commercial loan portfolio. Commercial loans represent 75 percent of total portfolio loans. Commercial loans have been more impacted by the economic slowdown in our markets. The ability of customers to repay commercial loans is more dependent upon the success of their businesses, continuing income and general economic conditions. The risk of loss is higher on such loans compared to consumer loans, which have incurred lower losses in our market.

Our ALL Committee meets quarterly to verify the overall adequacy of the ALL. Additionally, on an annual basis, the ALL Committee meets to validate our ALL model. This validation includes reviewing the pools of loans to ensure the segmentation results in relevant homogeneous pools of loans. The ALL Committee reviews the LEP and LBP used to calculate the loss rates. Further, the ALL Committee reviews the qualitative factors to ensure that both the categories and the range of qualitative adjustments remain appropriate. As a result of this ongoing monitoring process, we may make changes to our ALL methodology to be responsive to the economic environment.

Although we believe our process for determining the ALL adequately considers all of the factors that would likely result in credit losses, the process includes subjective elements and may be susceptible to significant change. To the extent actual losses are higher than management estimates, additional provisions for loan losses could be required and could adversely affect our earnings or financial position in future periods.

Income Taxes

We estimate income tax expense based on amounts expected to be owed to the tax jurisdictions where we conduct business. The laws are complex and subject to different interpretations by us and various taxing authorities. On a quarterly basis, we assess the reasonableness of our effective tax rate based upon our current estimate of the amount and components of pre-tax income, tax credits and the applicable statutory tax rates expected for the full year.

We determine deferred income tax assets and liabilities using the asset and liability method, and we report them in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities and recognizes enacted changes in tax rate and laws. When deferred tax assets are recognized, they are subject to a valuation allowance based on management’s judgment as to whether realization is more likely than not.

Accrued taxes represent the net estimated amount due to taxing jurisdictions and are reported in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. We evaluate and assess the relative risks and appropriate tax treatment of transactions and filing positions after considering statutes, regulations, judicial precedent and other information and maintain tax accruals consistent with the evaluation of these relative risks and merits. Changes to the estimate of accrued taxes occur periodically due to changes in tax rates, interpretations of tax laws, the status of examinations being conducted by taxing authorities and changes to statutory, judicial and regulatory guidance. These changes, when they occur, can affect deferred taxes and accrued taxes, as well as the current period’s income tax expense and can be significant to our operating results.

Tax positions are recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50 percent likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded.

23

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Securities Valuation

We determine the appropriate classification of securities at the time of purchase. All securities, including both debt and equity securities, are classified as available-for-sale. These securities are carried at fair value with net unrealized gains and losses deemed to be temporary and are reported separately as a component of other comprehensive income (loss), net of tax. Realized gains and losses on the sale of available-for-sale securities and other-than-temporary impairment, or OTTI, charges are recorded within noninterest income in the Consolidated Statements of Net Income. Realized gains and losses on the sale of securities are determined using the specific-identification method.

We perform a quarterly review of our securities to identify those that may indicate an OTTI. Our policy for OTTI within the marketable equity securities portfolio generally requires an impairment charge when the security is in a loss position for 12 consecutive months, unless facts and circumstances would suggest the need for an OTTI prior to that time. Our policy for OTTI within the debt securities portfolio is based upon a number of factors, including but not limited to, the length of time and extent to which the estimated fair value has been less than cost, the financial condition of the underlying issuer, the ability of the issuer to meet contractual obligations, the best estimate of the impairment charge representing credit losses, the likelihood of the security’s ability to recover any decline in its estimated fair value and whether we intend to sell the investment security or if it is more likely than not that we will be required to sell the security prior to the security’s recovery. If the impairment is considered other-than-temporary based on management’s review, the impairment must be separated into credit and non-credit portions. The credit component is recognized in the Consolidated Statements of Net Income and the non-credit component is recognized in other comprehensive income (loss), net of applicable taxes. If the financial markets experience deterioration, charges to income could occur in future periods.

Goodwill and Other Intangible Assets

As a result of acquisitions, we have recorded goodwill and identifiable intangible assets in our Consolidated Balance Sheets. Goodwill represents the excess of the purchase price over the fair value of net assets acquired. We account for business combinations using the acquisition method of accounting.

Goodwill relates to value inherent in the Community Banking and Insurance reporting units and that value is dependent upon our ability to provide quality, cost-effective services in the face of competition from other market participants. This ability relies upon continuing investments in processing systems, the development of value-added service features and the ease of use of our services. As such, goodwill value is supported ultimately by profitability that is driven by the volume of business transacted. A decline in earnings as a result of a lack of growth or the inability to deliver cost-effective services over sustained periods can lead to impairment of goodwill, which could adversely impact our earnings in future periods.

We have three reporting units: Community Banking, Insurance and Wealth Management. The carrying value of goodwill is tested annually for impairment each October 1st or more frequently if it is determined that a triggering event has occurred. We first assess qualitatively whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. Our qualitative assessment considers such factors as macroeconomic conditions, market conditions specifically related to the banking industry, our overall financial performance and various other factors. If we determine that it is more likely than not that the fair value is less than the carrying amount, we proceed to test for impairment. The evaluation for impairment involves comparing the current estimated fair value of each reporting unit to its carrying value, including goodwill. If the current estimated fair value of a reporting unit exceeds its carrying value, no additional testing is required and an impairment loss is not recorded. If the estimated fair value of a reporting unit is less than the carrying value, further valuation procedures are performed that could result in impairment of goodwill being recorded. Further valuation procedures would include allocating the estimated fair value to all assets and liabilities of the reporting unit to determine an implied goodwill value. If the implied value of goodwill of a reporting unit is less than the carrying amount of that goodwill, an impairment loss is recognized in an amount equal to that excess. We completed the annual goodwill impairment assessment as required in 2014, 2013 and 2012; the results indicated that the fair value of each reporting unit exceeded the carrying value.

Based upon our qualitative assessment performed for our annual impairment analysis, we concluded that it is more likely than not that the fair value of the reporting units exceeds the carrying value. Both the national economy and the local economies in our markets have stabilized. General economic activity and key indicators such as housing and unemployment continue to show improvement. While still challenging, the banking environment continues to improve with fewer bank failures, better asset quality, improved earnings and generally better stock prices. Activity in mergers and acquisitions demonstrated that there is premium value of banking franchises and a number of banks of our size have been able to access the capital markets over the past year. Our stock price has increased, and our stock has traded above book value throughout 2014. Additionally, our overall performance has improved, and we have not identified any other facts or circumstances that would cause us to conclude that it is more likely than not that the fair value of each of the reporting units would be less than the carrying value of the reporting unit.

We determine the amount of identifiable intangible assets based upon independent core deposit and insurance contract valuations at the time of acquisition. Intangible assets with finite useful lives, consisting primarily of core deposit and customer

24

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

list intangibles, are amortized using straight-line or accelerated methods over their estimated weighted average useful lives, ranging from 10 to 16 years. Intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. No such events or changes in circumstances occurred during the years ended December 31, 2014, 2013 and 2012.

The financial services industry and securities markets can be adversely affected by declining values. If economic conditions result in a prolonged period of economic weakness in the future, our business segments, including the Community Banking segment, may be adversely affected. In the event that we determine that either our goodwill or finite lived intangible assets are impaired, recognition of an impairment charge could have a significant adverse impact on our financial position or results of operations in the period in which the impairment occurs.

Recent Accounting Pronouncements and Developments

Note 1 Summary of Significant Accounting Policies in the Notes to the Consolidated Financial Statements, which is included in Part II, Item 8 of this Report, discusses new accounting pronouncements that we adopted and the expected impact of accounting pronouncements recently issued or proposed, but not yet required to be adopted.

Executive Overview

We are a bank holding company headquartered in Indiana, Pennsylvania with assets of $5.0 billion at December 31, 2014. We provide a full range of financial services through offices in 12 Pennsylvania counties with retail and commercial banking products, cash management services, trust and brokerage services and insurance. We also have two loan production offices, or LPOs, in northeast and central Ohio. Our common stock trades on the NASDAQ Global Select Market under the symbol “STBA.”

We earn revenue primarily from interest on loans and securities and fees charged for financial services provided to our customers. Offsetting these revenues are the cost of deposits and other funding sources, provision for loan losses and other operating costs such as salaries and employee benefits, data processing, occupancy and tax expense.

Our mission is to become the financial services provider of choice within the markets that we serve. We strive to do this by delivering exceptional service and value, one customer at a time. Our strategic plan focuses on organic growth, which includes growth within our current footprint and growth through market expansion. We also actively evaluate acquisition opportunities that, if successful, can be another source of growth. Our strategic plan includes a collaborative model that combines expertise from all of our business segments and focuses on satisfying each customer’s individual financial objectives.

During 2014, we successfully executed on our organic growth strategy through growth in our current footprint and by expanding into new markets. We opened an LPO in central Ohio on March 24, 2014. On June 18, 2014, we opened a new branch with a team of experienced banking professionals in State College, Pennsylvania. most recently, on January 14, 2015, we announced our planned expansion into western New York. During 2014, we grew our business organically with portfolio loans increasing $302.5 million, or 8.5 percent, compared to December 31, 2013. Our expansion into Ohio, with the establishment of two LPOs, has been very successful and contributed approximately $146.0 million, or

48 percent, of our total loan growth in 2014. Further driving loan growth was the expansion of our sales team with the addition of commercial lenders in various markets throughout 2014.

On October 29, 2014, we entered into a definitive agreement to acquire Integrity Bancshares, Inc., or Integrity, based in Camp Hill, Pennsylvania. Integrity had approximately $844.0 million in assets at December 31, 2014 and maintains eight branches across four counties. The acquisition will expand our footprint into south-central Pennsylvania. The transaction was valued at approximately $155.0 million and is expected to close in the first quarter of 2015 after satisfaction of customary closing conditions. As soon as practicable following the merger, Integrity Bank, a Pennsylvania state-chartered bank subsidiary of Integrity, will be merged with and into S&T Bank with S&T Bank continuing as the surviving bank. The bank merger is expected to close in the second quarter of 2015. However, for a period of at least three years following the merger, S&T Bank intends to operate bank branches in the markets currently served by Integrity Bank using the name "Integrity Bank - A Division of S&T Bank".

Net income for 2014 increased $7.4 million, or 14.6 percent, to $57.9 million, or $1.95 per diluted share, compared to $50.5 million, or $1.70 per diluted share for 2013. Return on average assets increased 10 basis points to 1.22 percent compared to 1.12 percent for 2013 and return on average equity increased 50 basis points to 9.71 percent compared to 9.21 percent for 2013. The improvement in earnings was primarily due to an increase in net interest income of $8.8 million, or 6.4 percent, and a decrease in the provision for loan losses of $6.6 million, or 79 percent. The increase in net interest income was primarily due to strong average loan growth of $259.3 million during 2014 and lower funding costs. Net interest margin, on a FTE basis, was unchanged at 3.50 percent for both 2014 and 2013. The provision for loan losses decreased due to a significant improvement in asset quality with only $0.1 million in net charge-offs in 2014. Despite significant growth in 2014, expenses remained well controlled with a decrease of $0.2 million. Our success in 2014 was a result of our ability to execute on our key strategic initiatives of loan growth, improving asset quality and expense control.

25

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Asset quality continued to improve throughout 2014 resulting in a $6.6 million, or 79 percent, decline in the provision for loan losses from the prior year. Net charge-offs decreased $8.5 million to only $0.1 million from the prior year.Total nonperforming loans were $12.5 million, or 0.32 percent of total loans, at December 31, 2014, which represents a 45 percent decrease from $22.5 million, or 0.63 percent of total loans at December 31, 2013. Special mention and substandard loans also decreased $49.1 million, or 26 percent, to $138.6 million from $187.7 million at December 31, 2013. This significant improvement in asset quality was due to the continued improvement of the economic conditions in our markets and a strategic focus on actively managing and bringing to resolution our problem loans.

Our focus continues to be on loan and deposit growth and implementing opportunities to increase fee income while maintaining a strong expense discipline. The low interest rate environment will continue to challenge our net interest income, but our organic growth will help to mitigate the impact. We plan to evaluate new markets and strive to replicate the success of our LPOs in northeast and central Ohio. Our focus is also on maintaining and attracting new sales personnel to execute on our loan and fee growth strategies. Our capital position remains strong and we are well positioned to take advantage of acquisition opportunities as they arise.

Results of Operations

Year Ended December 31, 2014

Earnings Summary

Net income available to common shareholders increased $7.4 million, or 14.6 percent, to $57.9 million or $1.95 per share in 2014 compared to $50.5 million or $1.70 per share in 2013. The increase in net income was primarily due to an increase in net interest income of $8.8 million, or 6.4 percent and a $6.6 million, or 79 percent, decrease in the provision for loan losses.

Net interest income increased $8.8 million, or 6.4 percent, to $148.0 million compared to $139.2 million in 2013. The increase in net interest income is mainly due to interest earning asset growth and lower funding costs. Total average interest earning assets increased $275.5 million, or 6.7 percent, compared to 2013. The increase was driven by higher average loans, which is due to our successful efforts in growing our loan portfolio organically over the past year. Net interest margin, on a FTE basis, was unchanged at 3.50 percent for both 2014 and 2013.

The provision for loan losses decreased $6.6 million, or 79 percent, to $1.7 million during 2014 compared to $8.3 million in 2013. The lower provision for loan losses was due to improving economic conditions in our markets which have positively impacted our asset quality metrics in all categories, including decreases in loan charge-offs, nonaccrual loans, special mention and substandard loans and the delinquency status of our loan portfolio. Net loan charge-offs were only $0.1 million for 2014 compared to $8.5 million in 2013.

Total noninterest income decreased $5.2 million, or 10.1 percent, to $46.3 million for 2014 compared to $51.5 million for 2013. The decrease in noninterest income was primarily related to a $3.1 million gain on the sale of our merchant card servicing business that occurred in 2013. Mortgage banking income decreased $1.2 million, or 57 percent, due to higher interest rates in 2014 compared to 2013, resulting in a decrease in the volume of loans being originated and sold. Interest rate swap fees with our commercial customers decreased $0.6 million, or 57 percent, due to a decline in customer demand for this product. These decreases were partially offset by an increase in our wealth management fees of $0.6 million, or 6 percent, due to new business development efforts and certain fee increases.

Total noninterest expense decreased $0.2 million to $117.2 million for 2014 compared to $117.4 million for 2013. Despite significant growth in 2014, expenses were well controlled. Notable declines were a decrease of $2.1 million for pension expense resulting from a change in actuarial assumptions used to calculate our pension liability and a $0.8 million decrease in other taxes due to legislative changes that resulted in a reduction in Pennsylvania shares tax. These decreases were offset by relatively small increases in various expense items in numerous categories.

The provision for income taxes increased $3.0 million to $17.5 million compared to $14.5 million in 2013. The increase is primarily due to a $10.4 million increase in pretax income.

26

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Net Interest Income

Our principal source of revenue is net interest income. Net interest income represents the difference between the interest and fees earned on interest-earning assets and the interest paid on interest-bearing liabilities. Net interest income is affected by changes in the average balance of interest-earning assets and interest-bearing liabilities and changes in interest rates and spreads.Maintaining consistent spreads between interest-earning assets and interest-bearing liabilities is significant to our financial performance because net interest income comprised 76 percent of operating revenue (net interest income plus noninterest income, excluding security gains/losses and non-recurring income and expenses) in 2014 and 74 percent of operating revenue in 2013. Refer to page 52 Explanation of Use of Non-GAAP Financial Measures for a discussion of operating revenue as a non-GAAP financial measure. The level and mix of interest-earning assets and interest-bearing liabilities is managed by our Asset and Liability Committee, or ALCO, in order to mitigate interest rate and liquidity risks of the balance sheet. A variety of ALCO strategies were implemented, within prescribed ALCO risk parameters, to maintain an acceptable net interest margin on interest-earning assets.

The interest income on interest-earning assets and the net interest margin are presented on a fully taxable-equivalent, or FTE, basis. The FTE basis adjusts for the tax benefit of income on certain tax-exempt loans and securities using the federal statutory tax rate of 35 percent for each period and the dividend-received deduction for equity securities. We believe this measure to be the preferred industry measurement of net interest income that provides a relevant comparison between taxable and non-taxable amounts.

The following table reconciles interest income and interest rates per the Consolidated Statements of Net Income to net interest income and rates adjusted to a FTE basis for the periods presented:

	Years Ended December 31,
(dollars in thousands)	2014			2013			2012
Total interest income	$	160,523		$	153,756		$	156,251
Total interest expense	12,481			14,563			21,024
Net interest income per consolidated statements of net income	148,042			139,193			135,227
Adjustment to FTE basis	5,461			4,850			4,471
Net Interest Income (FTE) (non-GAAP)	$	153,503		$	144,043		$	139,698
Net interest margin	3.38		%	3.39		%	3.45		%
Adjustment to FTE basis	0.12			0.11			0.12
Net Interest Margin (FTE) (non-GAAP)	3.50		%	3.50		%	3.57		%

27

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Average Balance Sheet and Net Interest Income Analysis

The following table provides information regarding the average balances, interest and rates earned on interest-earning assets and the average balances, interest and rates paid on interest-bearing liabilities for the years ended December 31:

	2014							2013							2012
(dollars in thousands)	Average Balance			Interest		Rate		Average Balance			Interest		Rate		Average Balance			Interest		Rate
ASSETS
Loans(1)(2)	$	3,707,808		$	150,531	4.06	%	$	3,448,529		$	145,366	4.22	%	$	3,213,018		$	147,819	4.59	%
Interest-bearing deposits with banks	92,972			234		0.25	%	167,952			444		0.26	%	289,947			718		0.25	%
Taxable investment securities(3)	443,186			8,803		1.99	%	371,099			7,458		2.01	%	291,483			7,346		2.52	%
Tax-exempt investment securities(2)	128,750			5,933		4.61	%	110,009			5,231		4.76	%	95,382			4,802		5.03	%
Federal Home Loan Bank and other restricted stock	14,083			483		3.43	%	13,692			107		0.78	%	17,945			37		0.21	%
Total Interest-earning Assets	4,386,799			165,984		3.78	%	4,111,281			158,606		3.86	%	3,907,775			160,722		4.10	%
Noninterest-earning assets:
Cash and due from banks	50,255							51,534							53,517
Premises and equipment, net	36,115							37,087							38,460
Other assets	337,205							353,857							361,982
Less allowance for loan losses	(48,011		)					(47,967		)					(49,196		)
Total Assets	$	4,762,363						$	4,505,792						$	4,312,538
LIABILITIES AND SHAREHOLDERS’ EQUITY
Interest-bearing liabilities:
Interest-bearing demand	$	321,907		$	70	0.02	%	$	309,748		$	75	0.02	%	$	306,994		$	146	0.05	%
Money market	321,294			507		0.16	%	319,831			446		0.14	%	308,719			528		0.17	%
Savings	1,033,482			1,607		0.16	%	1,001,209			1,735		0.17	%	902,889			2,356		0.26	%
Certificates of deposit	905,346			7,165		0.79	%	973,339			8,918		0.92	%	1,078,945			13,715		1.27	%
Brokered deposits	226,169			780		0.34	%	81,112			232		0.29	%	25,317			51		0.20	%
Total Interest-bearing deposits	2,808,198			10,129		0.36	%	2,685,239			11,406		0.42	%	2,622,864			16,796		0.64	%
Securities sold under repurchase agreements	28,372			2		0.01	%	54,057			62		0.12	%	47,388			82		0.17	%
Short-term borrowings	164,811			511		0.31	%	101,973			279		0.27	%	50,212			123		0.24	%
Long-term borrowings	20,571			617		3.00	%	24,312			746		3.07	%	33,841			1,107		3.26	%
Junior subordinated debt securities	45,619			1,222		2.68	%	65,989			2,070		3.14	%	90,619			2,916		3.21	%
Total Interest-bearing Liabilities	3,067,571			12,481		0.41	%	2,931,570			14,563		0.50	%	2,844,924			21,024		0.74	%
Noninterest-bearing liabilities:
Noninterest-bearing demand	1,046,606							955,475							877,056
Other liabilities	52,031							69,976							73,746
Shareholders’ equity	596,155							548,771							516,812
Total Liabilities and Shareholders’ Equity	$	4,762,363						$	4,505,792						$	4,312,538
Net Interest Income(2)(3)				$	153,503						$	144,043						$	139,698
Net Interest Margin(2)(3)						3.50	%						3.50	%						3.57	%

(1) Nonaccruing loans are included in the daily average loan amounts outstanding.

(2) Tax-exempt income is on a FTE basis using the statutory federal corporate income tax rate of 35 percent.

(3) Taxable investment income is adjusted for the dividend-received deduction for equity securities.

28

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

The following table details a summary of the changes in interest earned and interest paid resulting from changes in volume and rates for the years presented:

(dollars in thousands)	2014 Compared to 2013 Increase (Decrease) Due to									2013 Compared to 2012 Increase (Decrease) Due to
	Volume(4)			Rate(4)			Net			Volume(4)			Rate(4)			Net
Interest earned on:
Loans(1)(2)	$	10,929		$	(5,764	)	$	5,165		$	10,835		$	(13,288	)	$	(2,453	)
Interest-bearing deposits with bank	(198		)	(12		)	(210		)	(302		)	28			(274		)
Taxable investment securities(3)	1,449			(104		)	1,345			2,007			(1,895		)	112
Tax-exempt investment securities(2)	891			(189		)	702			735			(306		)	429
Federal Home Loan Bank and other restricted stock	3			374			377			(8		)	78			70
Total Interest-earning Assets	13,074			(5,695		)	7,379			13,267			(15,383		)	(2,116		)
Interest paid on:
Interest-bearing demand	$	3		$	(8	)	$	(5	)	$	1		$	(72	)	$	(71	)
Money market	2			59			61			19			(101		)	(82		)
Savings	56			(184		)	(128		)	257			(878		)	(621		)
Certificates of deposit	(623		)	(1,130		)	(1,753		)	(1,343		)	(3,454		)	(4,797		)
Brokered deposits	415			133			548			112			69			181
Securities sold under repurchase agreements	(30		)	(29		)	(59		)	12			(32		)	(20		)
Short-term borrowings	172			60			232			126			30			156
Long-term borrowings	(115		)	(14		)	(129		)	(311		)	(50		)	(361		)
Junior subordinated debt securities	(639		)	(209		)	(848		)	(792		)	(54		)	(846		)
Total Interest-bearing Liabilities	(759		)	(1,322		)	(2,081		)	(1,919		)	(4,542		)	(6,461		)
Net Change in Net Interest Income	$	13,833		$	(4,373	)	$	9,460		$	15,186		$	(10,841	)	$	4,345

(1) Nonaccruing loans are included in the daily average loan amounts outstanding.

(2) Tax-exempt income is on a FTE basis using the statutory federal corporate income tax rate of 35 percent.

(3) Taxable investment income is adjusted for the dividend-received deduction for equity securities.

(4) Changes to rate/volume are allocated to both rate and volume on a proportionate dollar basis.

Net interest income on a FTE basis increased $9.5 million, or 6.6 percent, to $153.5 million compared to $144.0 million in 2013. Net interest margin on a FTE basis remained unchanged at 3.50 percent compared to 2013. The increase in interest income of $7.4 million, or 4.7 percent, was mainly driven by the $275.5 million increase in interest-earning assets compared to 2013. The interest-earning asset balance increase is mainly attributable to loan growth. Average loan balances increased by $259.3 million compared to 2013 as a result of organic growth, primarily in our commercial loan portfolio. Due to the continued low interest rate environment the rate earned on loans decreased 16 basis points compared to 2013. Average interest-bearing deposits with banks, which is primarily cash at the Federal Reserve, decreased $75.0 million compared to 2013. Average investment securities, including Federal Home Loan Bank, or FHLB, and other restricted stock, increased $91.2 million compared to 2013. Deployment of excess cash at the Federal Reserve to higher yielding investment securities and an increase in the FHLB dividend rate had a positive impact on the interest-earning asset rate. Overall, the FTE rate on total interest-earning assets decreased 8 basis points to 3.78 percent compared to 2013.

Interest expense decreased $2.1 million to $12.5 million for 2014 as compared to $14.6 million for 2013. The decrease in interest expense is mainly due to a shift in the mix of our interest-bearing liabilities from higher rate certificates of deposits, or CDs, to lower cost deposits and borrowings. Total interest-bearing deposits increased $123.0 million in 2014 compared to 2013. Higher interest-bearing deposits are due to an increase of $145.1 million in brokered deposits and an increase of $45.9 million in interest-bearing demand, money market and savings balances offset by a decrease in CDs of $68.0 million compared to 2013. The cost of total interest-bearing deposits decreased 6 basis points to 0.36 percent for 2014 compared to 0.42 percent for 2013. The decrease in the cost of interest-bearing deposits was mainly due to the maturity of higher rate CDs being replaced by lower rate deposits. In addition to a shift in the mix of our interest-bearing liabilities, interest expense for 2014 also decreased due to the redemption of $45.0 million of subordinated debt during the second quarter of 2013. Interest expense on average borrowings declined by $0.8 million in 2014 compared to 2013. Overall, the cost of interest-bearing liabilities decreased 9 basis points to 0.41 percent in 2014 as compared to 0.50 percent in 2013.

29

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Provision for Loan Losses

The provision for loan losses is the amount to be added to the ALL after adjusting for charge-offs and recoveries to bring the ALL to a level considered appropriate to absorb probable losses inherent in the loan portfolio. The provision for loan losses decreased $6.6 million, or 79 percent, to $1.7 million for 2014 compared to $8.3 million for 2013. The decrease is due to continued improvement in the economic conditions in our markets which resulted in a significant improvement in our asset quality. Net charge-offs were only $0.1 million, or zero percent of average loans in 2014, compared to $8.5 million, or

0.25 percent of average loans in 2013. Total nonperforming loans were $12.5 million, or 0.32 percent of total loans at December 31, 2014, which represents a 45 percent decrease from $22.5 million, or 0.63 percent of total loans at

December 31, 2013. Special mention and substandard commercial loans also decreased $50.8 million, or 31 percent, to

$112.2 million from $163.0 million at December 31, 2013. Refer to the Allowance for Loan Losses section of this Management’s Discussion and Analysis of Financial Condition and Results of Operations, or MD&A, for further details.

Noninterest Income

	Years Ended December 31,
(dollars in thousands)	2014		2013		$ Change			% Change
Securities gains, net	$	41	$	5	$	36		NM
Wealth management fees	11,343		10,696		647			6.0	%
Debit and credit card fees	10,781		10,931		(150		)	(1.4	)%
Service charges on deposit accounts	10,559		10,488		71			0.7	%
Insurance fees	5,955		6,248		(293		)	(4.7	)%
Gain on sale of merchant card servicing business	—		3,093		(3,093		)	—	%
Mortgage banking	917		2,123		(1,206		)	(56.8	)%
Other Income:
BOLI income	1,773		1,856		(83		)	(4.5	)%
Letter of credit origination fees	1,017		1,098		(81		)	(7.4	)%
Interest rate swap fees	440		1,012		(572		)	(56.5	)%
Other	3,512		3,977		(465		)	(11.7	)%
Total Other Noninterest Income	6,742		7,943		(1,201		)	(15.1	)%
Total Noninterest Income	$	46,338	$	51,527	$	(5,189	)	(10.1	)%

NM- percentage not meaningful

Noninterest income decreased $5.2 million, or 10.1 percent, in 2014 compared to 2013. The decrease primarily related to the sale of our merchant card servicing business in 2013 combined with decreases in mortgage banking and other noninterest income. These decreases were partially offset by an increase in wealth management fees.

During the first quarter of 2013, we sold our merchant card servicing business for $4.8 million and paid deconversion and termination fees of $1.7 million to the merchant processor resulting in a net gain of $3.1 million. In conjunction with the sale of the merchant card servicing business, we entered into a marketing and sales alliance agreement with the purchaser, providing transition fees, royalties and referral revenue. Income from the marketing and sales alliance agreement is included in debit and credit card fees.

Mortgage banking income decreased $1.2 million in 2014 compared to 2013 due to an increase in mortgage rates that occurred in the second quarter of 2013, resulting in a decrease in the volume of loans originated for sale in the secondary market, less favorable pricing on loan sales and also impacted the valuation of our mortgage servicing rights, or MSRs, asset. During the year ended December 31, 2014, we sold 33 percent fewer mortgages with $42.0 million in loan sales compared to $62.9 million during 2013. We maintain the servicing rights when selling our loans and experienced a minor impairment on our MSR asset in 2014 compared to an impairment recapture of $0.8 million in 2013.

Interest rate swap fees from our commercial customers decreased $0.6 million compared to the prior year due to a decline in customer demand for this product. The decrease in other noninterest income of $0.5 million for year ended December 31, 2014 was primarily attributable to a change in the valuation of our rabbi trust related to a deferred compensation plan, which has a corresponding offset in salaries and benefit expense resulting in no impact to net income. Wealth management fees increased $0.6 million due to higher assets under management, new business development efforts and fee increases.

30

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Noninterest Expense

	Years Ended December 31,
(dollars in thousands)	2014		2013		$ Change			% Change
Salaries and employee benefits	$	60,442	$	60,847	$	(405	)	(0.7	)%
Data processing	8,737		8,263		474			5.7	%
Net occupancy	8,211		8,018		193			2.4	%
Furniture and equipment	5,317		4,883		434			8.9	%
Professional services and legal	3,717		4,184		(467		)	(11.2	)%
Marketing	3,316		2,929		387			13.2	%
Other taxes	2,905		3,743		(838		)	(22.4	)%
FDIC insurance	2,436		2,772		(336		)	(12.1	)%
Merger related expense	689		838		(149		)	(17.8	)%
Other expenses:
Joint venture amortization	4,054		4,095		(41		)	(1.0	)%
Loan related expenses	2,579		2,432		147			6.0	%
Telecommunications	2,220		1,691		529			31.3	%
Supplies	1,161		1,130		31			2.7	%
Amortization of intangibles	1,129		1,591		(462		)	(29.0	)%
Postage	1,058		970		88			9.1	%
Other	9,269		9,006		263			2.9	%
Total Other Noninterest Expense	21,470		20,915		555			2.7	%
Total Noninterest Expense	$	117,240	$	117,392	$	(152	)	(0.1	)%

Noninterest expense remained relatively unchanged during 2014. Increases in data processing, furniture and equipment, marketing and telecommunication expenses were offset by decreases in salaries and employee benefits, professional services and legal, other taxes, amortization of intangibles and Federal Deposit Insurance Corporation, or FDIC, insurance.

The increase of $0.5 million in data processing expense in 2014 primarily related to the implementation of a new teller platform and software that significantly strengthens the authentication of our customers that use our online banking product. The increase of $0.4 million in furniture and equipment is due to purchases of furniture and equipment for our newly opened locations, including our LPO in central Ohio, our branch in State College, Pennsylvania and our new training and operations center. The increase in marketing expense of $0.4 million is due to additional marketing promotions and the transition to a new marketing agency during 2014. Telecommunication expense increased $0.5 million due to a network upgrade.

Salaries and employee benefits decreased $0.4 million during 2014 primarily due to a $2.1 million reduction in pension expense resulting from a change in actuarial assumptions used to calculate our pension liability, offset by an increase of $1.8 million in incentive expense due to our strong performance in 2014. Professional services and legal expense decreased $0.5 million primarily due to additional external accounting and consulting charges that were incurred in 2013. Other taxes decreased $0.8 million during 2014 due to legislative changes that resulted in a reduction in Pennsylvania shares tax expense. FDIC insurance charges are based in part on our financial ratios which have improved, resulting in a decrease in our assessment of $0.3 million. Amortization of intangibles related to former acquisitions decreased $0.5 million during 2014 due to the core deposit intangible, or CDI, for one of those acquisitions being fully amortized at the end of 2013.

Our efficiency ratio, which measures noninterest expense as a percent of noninterest income plus net interest income, on a FTE basis, excluding security gains/losses, was 59 percent for 2014 and 60 percent for 2013. Refer to page 57 Explanation of Use of Non-GAAP Financial Measures for a discussion of this non-GAAP financial measure.

Federal Income Taxes

We recorded a federal income tax provision of $17.5 million in 2014 compared to $14.5 million in 2013. The effective tax rate, which is the provision for income taxes as a percentage of pretax income was 23.2 percent in 2014 compared to 22.3 percent in 2013. We ordinarily generate an annual effective tax rate that is less than the statutory rate of 35 percent due to benefits resulting from tax-exempt interest, excludable dividend income, tax-exempt income on bank owned life insurance, or BOLI, and tax benefits associated with Low Income Housing Tax Credits, or LIHTC. The increase to our effective tax rate was primarily due to an increase of $10.4 million in pre-tax income which diluted the permanent benefits listed above.

31

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Results of Operations

Year Ended December 31, 2013

Earnings Summary

Net income available to common shareholders increased $16.3 million, or 48 percent, to $50.5 million or $1.70 per share in 2013 compared to $34.2 million or $1.18 per share in 2012. The increase in net income was primarily due to higher net interest income of $4.0 million, or three percent, a $14.5 million, or 64 percent, decrease in the provision for loan losses and a $5.5 million, or four percent, decrease in noninterest expense. The common return on average assets increased from 0.79 percent at December 31, 2012 to 1.12 percent at December 31, 2013, and the common return on average equity rose to 9.21 percent at December 31, 2013, from 6.62 percent at December 31, 2012.

Net interest income increased $4.0 million to $139.2 million compared to $135.2 million in 2012 due to improvement in our funding costs along with an increase in average interest earning assets of $203.5 million, or 5.2 percent. The increase in earning assets resulted from higher average loans outstanding due to strong organic loan growth in 2013 and our two acquisitions in 2012.

The provision for loan losses decreased $14.5 million to $8.3 million during 2013 compared to $22.8 million in 2012. The decrease in the provision for loan losses for the year is a result of the improving economic conditions which have positively impacted our asset quality metrics in all categories, including decreases in loan charge-offs, nonaccrual loans, special mention and substandard loans and the delinquency status of our loan portfolio. Net loan charge-offs decreased 66 percent to $8.5 million in 2013 compared to $25.2 million in 2012.

Total noninterest income was relatively unchanged at $51.5 million for the year ended December 31, 2013 compared to $51.9 million for 2012. The decrease of $0.4 million was primarily due to a $3.0 million gain on the sale of securities in 2012, $0.8 million decrease in mortgage banking and $1.0 million decrease other noninterest income. These decreases were offset by a $3.1 million net gain from the sale of our merchant card servicing business and other increases in wealth management income, services charges on deposits and insurance income.

Total noninterest expense decreased $5.5 million to $117.4 million for the year ended 2013 compared to $122.9 million for 2012. Professional services and legal decreased $1.5 million, data processing decreased $0.6 million and other noninterest expense decreased $4.1 million. These decreases were primarily a result of a $5.1 million decrease in merger related expenses that were incurred in 2012 as well as expense control initiatives implemented throughout 2013. The decrease in other noninterest expense was primarily in other real estate owned, or OREO, and unfunded loan commitments. These decreases were offset by increases in salaries and benefits, which increased $0.6 million, net occupancy, which increased $0.4 million and other taxes, which increased $0.5 million from 2012. These increases are due to growth from our acquisitions and the expansion of loan production into Ohio in 2012.

The $23.6 million increase in pretax income resulted in an increase of $7.2 million in the provision for income taxes of $14.5 million in 2013 compared to $7.3 million in 2012.

Net Interest Income

Our principal source of revenue is net interest income. Net interest income represents the difference between the interest and fees earned on interest-earning assets and the interest paid on interest-bearing liabilities. Net interest income is affected by changes in the average balance of interest-earning assets and interest-bearing liabilities and changes in interest rates and spreads. Maintaining consistent spreads between interest-earning assets and interest-bearing liabilities is significant to our financial performance because net interest income comprised 74 percent of operating revenue (net interest income plus noninterest income, excluding security gains/losses and non-recurring income and expenses) in 2013 and 73 percent of operating revenue in 2012. Refer to page 65 Explanation of Use of Non-GAAP Financial Measures for a discussion of operating revenue as a non-GAAP financial measure. The level and mix of interest-earning assets and interest-bearing liabilities are managed by our ALCO in order to mitigate interest rate and liquidity risks of the balance sheet. A variety of ALCO strategies were implemented, within prescribed ALCO risk parameters, to maintain an acceptable net interest margin.

The interest income on interest-earning assets and the net interest margin are presented on a FTE basis. The FTE basis adjusts for the tax benefit of income on certain tax-exempt loans and investments using the federal statutory tax rate of 35 percent for each period. We believe this measure to be the preferred industry measurement of net interest income that provides a relevant comparison between taxable and non-taxable amounts.

32

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

The following table reconciles net interest income and net interest margin from a GAAP to a non-GAAP basis for the years presented:

	Years Ended December 31,
(dollars in thousands)	2013			2012			2011
Total interest income	$	153,756		$	156,251		$	165,079
Total interest expense	14,563			21,024			27,733
Net interest income per consolidated statements of net income	139,193			135,227			137,346
Adjustment to FTE basis	4,850			4,471			4,154
Net Interest Income (FTE) (non-GAAP)	$	144,043		$	139,698		$	141,500
Net interest margin	3.39		%	3.45		%	3.72		%
Adjustment to FTE basis	0.11			0.12			0.11
Net Interest Margin (FTE) (non-GAAP)	3.50		%	3.57		%	3.83		%

33

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Average Balance Sheet and Net Interest Income Analysis

The following table provides information regarding the average balances, interest and rates earned on interest-earning assets and the average balances, interest and rates paid on interest-bearing liabilities for the years ended December 31:

	2013							2012							2011
(dollars in thousands)	Average Balance			Interest		Rate		Average Balance			Interest		Rate		Average Balance			Interest		Rate
ASSETS
Loans(1)(2)	$	3,448,529		$	145,366	4.22	%	$	3,213,018		$	147,819	4.59	%	$	3,216,856		$	156,845	4.88	%
Interest-bearing deposits with banks	167,952			444		0.26	%	289,947			718		0.25	%	123,714			302		0.24	%
Taxable investment securities(3)	371,099			7,458		2.01	%	291,483			7,346		2.52	%	270,805			8,471		3.13	%
Tax-exempt investment securities(2)	110,009			5,231		4.76	%	95,382			4,802		5.03	%	64,357			3,611		5.61	%
Federal Home Loan Bank and other restricted stock	13,692			107		0.78	%	17,945			37		0.21	%	20,856			4		0.02	%
Total Interest-earning Assets	4,111,281			158,606		3.86	%	3,907,775			160,722		4.10	%	3,696,588			169,233		4.58	%
Noninterest-earning assets:
Cash and due from banks	51,534							53,517							50,458
Premises and equipment, net	37,087							38,460							38,425
Other assets	353,857							361,982							344,378
Less allowance for loan losses	(47,967		)					(49,196		)					(57,241		)
Total Assets	4,505,792							4,312,538							4,072,608
LIABILITIES AND SHAREHOLDERS’ EQUITY
Interest-bearing liabilities:
Interest-bearing demand	309,748			75		0.02	%	306,994			146		0.05	%	286,588			363		0.13	%
Money market	319,831			446		0.14	%	308,719			528		0.17	%	249,497			376		0.15	%
Savings	1,001,209			1,735		0.17	%	902,889			2,356		0.26	%	761,274			1,267		0.17	%
Certificates of deposit	1,054,451			9,150		0.87	%	1,104,262			13,766		1.24	%	1,181,823			20,946		1.77	%
Total Interest-bearing deposits	2,685,239			11,406		0.42	%	2,622,864			16,796		0.64	%	2,479,182			22,952		0.93	%
Securities sold under repurchase agreements	54,057			62		0.12	%	47,388			82		0.17	%	41,584			53		0.13	%
Short-term borrowings	101,973			279		0.27	%	50,212			123		0.24	%	551			2		0.32	%
Long-term borrowings	24,312			746		3.07	%	33,841			1,107		3.26	%	31,651			1,091		3.45	%
Junior subordinated debt securities	65,989			2,070		3.14	%	90,619			2,916		3.21	%	90,619			3,635		4.01	%
Total Interest-bearing Liabilities	2,931,570			14,563		0.50	%	2,844,924			21,024		0.74	%	2,643,587			27,733		1.05	%
Noninterest-bearing liabilities:
Noninterest-bearing demand	955,475							877,056							792,911
Other liabilities	69,976							73,746							50,924
Shareholders’ equity	548,771							516,812							585,186
Total Liabilities and Shareholders’ Equity	$	4,505,792						$	4,312,538						$	4,072,608
Net Interest Income(2)(3)				$	144,043						$	139,698						$	141,500
Net Interest Margin(2)(3)						3.50	%						3.57	%						3.83	%

(1) Nonaccruing loans are included in the daily average loan amounts outstanding.

(2) Tax-exempt income is on a FTE basis using the statutory federal corporate income tax rate of 35 percent.

(3) Taxable investment income is adjusted for the dividend-received deduction for equity securities.

34

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

The following table details a summary of the changes in interest earned and interest paid resulting from changes in volume and rates for the years presented:

(dollars in thousands)	2013 Compared to 2012 Increase (Decrease) Due to									2012 Compared to 2011 Increase (Decrease) Due to
	Volume(4)			Rate(4)			Net			Volume(4)			Rate(4)			Net
Interest earned on:
Loans(1)(2)	$	10,835		$	(13,288	)	$	(2,453	)	$	(187	)	$	(8,839	)	$	(9,026	)
Interest-bearing deposits with bank	(302		)	28			(274		)	407			9			416
Taxable investment securities(3)	2,007			(1,895		)	112			647			(1,772		)	(1,125		)
Tax-exempt investment securities(2)	735			(306		)	429			1,741			(550		)	1,191
Federal Home Loan Bank and other restricted stock	(8		)	78			70			(1		)	34			33
Total Interest-earning Assets	13,267			(15,383		)	(2,116		)	2,607			(11,118		)	(8,511		)
Interest paid on:
Interest-bearing demand	$	1		$	(72	)	$	(71	)	$	26		$	(243	)	$	(217	)
Money market	19			(101		)	(82		)	89			63			152
Savings	257			(878		)	(621		)	236			853			1,089
Certificates of deposit	(622		)	(3,994		)	(4,616		)	(1,374		)	(5,806		)	(7,180		)
Securities sold under repurchase agreements	12			(32		)	(20		)	7			22			29
Short-term borrowings	126			30			156			157			(36		)	121
Long-term borrowings	(311		)	(50		)	(361		)	75			(59		)	16
Junior subordinated debt securities	(792		)	(54		)	(846		)	—			(719		)	(719		)
Total Interest-bearing Liabilities	(1,310		)	(5,151		)	(6,461		)	(784		)	(5,925		)	(6,709		)
Net Change in Net Interest Income	$	14,577		$	(10,232	)	$	4,345		$	3,391		$	(5,193	)	$	(1,802	)

(1) Nonaccruing loans are included in the daily average loan amounts outstanding.

(2) Tax-exempt income is on a FTE basis using the statutory federal corporate income tax rate of 35 percent.

(3) Taxable investment income is adjusted for the dividend-received deduction for equity securities.

(4) Changes to rate/volume are allocated to both rate and volume on a proportionate dollar basis.

Net interest income increased $4.3 million to $144.0 million compared to $139.7 million in 2012. Net interest margin on a FTE basis decreased by 7 basis points to 3.50 percent compared to 3.57 percent in 2012. The increase in net interest income is due to the improvement in funding costs coupled with an increase of $203.5 million in average earning assets which helped to offset the impact of declining earning asset rates. The decrease in net interest margin is a result of the current low rate environment, as earning asset rates decreased faster than our ability to offset those decreases on the funding side.

Interest income decreased $2.1 million to $158.6 million in 2013 compared to $160.7 million in 2012. The decrease in interest income was primarily driven by a 37 basis point decrease in average loan rates to 4.22 percent compared to 4.59 percent in 2012. The impact from the decrease in average loan rates was offset in part by the average loan balance increase of $235.5 million. Average investment securities increased $94.2 million and interest income increased $0.5 million on investment securities compared to 2012. The interest-bearing balance with banks, which is primarily funds held at the Federal Reserve, decreased $122.0 million during 2013 as cash was used to fund loan growth and investment securities purchases. Overall, the FTE rate on total interest-earning assets decreased 24 basis points to 3.86 percent in 2013 as compared to 4.10 percent in 2012.

Interest expense decreased $6.4 million to $14.6 million for 2013 compared to $21.0 million for 2012. The primary driver of the decrease in interest expense was the maturities of CDs bearing higher interest rates. For 2013, average interest-bearing deposits increased by $62.4 million to $2.7 billion as compared to $2.6 billion 2012. The increase in average interest-bearing deposits is attributed to a $98.3 million average balance increase in savings deposits and a $13.9 million average balanceincrease in interest-bearing demand and money market accounts, partially offset by an average balance decrease of $49.8 million in CDs. The cost of interest bearing deposits and the cost of total deposits including noninterest bearing demand deposits was 0.42 percent and 0.31 percent, decreases of 22 and 17 basis points from 2012, primarily due to CDs maturing and being replaced by both interest bearing and noninterest bearing demand and other lower interest rate deposits. The $24.6 million and 7 basis point decrease in junior subordinated debt is due to the early repayment of $45.0 million of junior subordinated debt during 2013. Long term borrowings decreased by $9.5 million and 19 basis points in 2013 as a result of maturities of FHLB long-term advances. Customer activity drove the $6.7 million balance increase in the securities sold under repurchase agreements, while the 5 basis point decrease was a result of lowering the product rate. Short term borrowings were utilized to replace the subordinated debt and long term debt resulting in an increase of $51.8 million from 2012. Overall, the cost of interest-bearing liabilities decreased 24 basis points to 0.50 percent for 2013 as compared to 0.74 percent for 2012.

35

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Provision for Loan Losses

The provision for loan losses is the amount to be added to the ALL after adjusting for charge-offs and recoveries to bring the ALL to a level considered appropriate to absorb probable losses inherent in the loan portfolio. The provision for loan losses decreased $14.5 million, or 64 percent, to $8.3 million for 2013 compared to $22.8 million for 2012. The decrease is due to better economic conditions in our markets which resulted in a significant improvement in our asset quality. Net charge-offs decreased $16.6 million, or 66 percent, from the prior year. Net charge-offs were $8.5 million, or 0.25 percent of average loans in 2013, compared to $25.2 million, or 0.78 percent of average loans in 2012. Total nonperforming loans were $22.5 million, or 0.63 percent, of total loans at December 31, 2013, which represents a 59 percent decrease from $55.0 million, or 1.63 percent of total loans at December 31, 2012. Special mention and substandard commercial loans also decreased $146.0 million, or 47 percent, to $163.0 million from $309.0 million at December 31, 2012. Refer to the Allowance for Loan Losses section of this Management's Discussion and Analysis of Financial Condition and Results of Operations, or MD&A, for further details.

Noninterest Income

	Years Ended December 31,
(dollars in thousands)	2013		2012		$ Change			% Change
Securities gains, net	$	5	$	3,016	$	(3,011	)	(99.8	)%
Debit and credit card fees	10,931		11,134		(203		)	(1.8	)%
Wealth management fees	10,696		9,808		888			9.1	%
Service charges on deposit accounts	10,488		9,992		496			5.0	%
Insurance fees	6,248		6,131		117			1.9	%
Gain on sale of merchant card servicing business	3,093		—		3,093			—	%
Mortgage banking	2,123		2,878		(755		)	(26.2	)%
Other Income
BOLI income	1,856		2,317		(461		)	(19.9	)%
Letter of credit origination fees	1,098		1,417		(319		)	(22.5	)%
Interest rate swap fees	1,012		1,036		(24		)	(2.3	)%
Other	3,977		4,183		(206		)	(4.9	)%
Total Other Noninterest Income	7,943		8,953		(1,010		)	(11.3	)%
Total Noninterest Income	$	51,527	$	51,912	$	(385	)	(0.7	)%

Noninterest income for 2013 remained relatively unchanged compared to 2012. Increases in fees from wealth management and insurance, increases in service charges on deposit accounts and the gain on the sale of our merchant card servicing business in January 2013 were offset by decreases in gains on sale of securities, debit and credit card fees, mortgage banking and other noninterest income.

We sold our merchant card servicing business for $4.8 million and paid deconversion and termination fees of $1.7 million to the merchant processor resulting in a net gain of $3.1 million. In conjunction with the sale of the merchant card servicing business, we entered into a marketing and sales alliance agreement with the purchaser, providing transition fees, royalties and referral revenue. Income from the marketing and sales alliance agreement is included in debit and credit card fees. Revenues from the marketing and sales alliance agreement of $1.7 million for 2013 were comparable to the merchant revenue included in debit and credit card fees of $1.8 million for 2012. The $0.5 million increase in service charges on deposit accounts was primarily due to increases in deposit related fees that occurred throughout 2013. Wealth management fees increased $0.9 million due to higher assets under management, primarily a result of improvements in the stock market. Further, our discount brokerage income increased due to higher commission fees in 2013 compared to 2012 as we hired additional financial advisors in 2012.

The $3.0 million decrease in security gains relates to almost no sales activity in 2013 versus the sales of two equity positions during 2012 as a result of increases in value after merger announcements. Mortgage banking income decreased $0.8 million during 2013 compared to the previous year due to a higher interest rate environment in 2013. Interest rates increased late in the second quarter of 2013 resulting in a decrease in the volume of loans originated for sale in the secondary market and less favorable pricing on loan sales. During the year ended December 31, 2013, we sold 24 percent fewer mortgages with $62.9 million in loan sales compared to $82.9 million during 2012. The decrease in other noninterest income of $1.0 million for year ended December 31, 2013 was primarily attributed to a decrease of $0.5 million in BOLI income related to a death benefit received in 2012 and a lower rate of return on BOLI throughout 2013 and a decrease in fee income on letters of credit of $0.3 million.

36

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Noninterest Expense

	Years Ended December 31,
(dollars in thousands)	2013			2012		$ Change			% Change
Salaries and employee benefits(1)	$	60,847		$	57,920	$	2,927		5.1	%
Data processing(1)	8,263			7,326		937			12.8	%
Net occupancy(1)	8,018			7,603		415			5.5	%
Furniture and equipment	4,883			5,262		(379		)	(7.2	)%
Professional services and legal(1)	4,184			4,610		(426		)	(9.2	)%
Other taxes	3,743			3,200		543			17.0	%
Marketing(1)	2,929			3,206		(277		)	(8.6	)%
FDIC insurance	2,772			2,926		(154		)	(5.3	)%
Merger related expense	838			5,968		(5,130		)	(86.0	)%
Other expenses:
Joint venture amortization	4,095			4,199		(104		)	(2.5	)%
Amortization of intangibles	1,591			1,709		(118		)	(6.9	)%
Other real estate owned	445			2,166		(1,721		)	(79.5	)%
Unfunded loan commitments	(60		)	1,811		(1,871		)	(103.3	)%
Other(1)	14,844			14,957		(113		)	(0.8	)%
Total Other Noninterest Expense	20,915			24,842		(3,927		)	(15.8	)%
Total Noninterest Expense	$	117,392		$	122,863	$	(5,471	)	(4.5	)%

(1) Excludes merger related expense.

Noninterest expense decreased $5.5 million, or 4.5 percent, to $117.4 million, for the year ended December 31, 2013 compared to 2012. The decrease in noninterest expense was primarily due to a decline in merger related expenses and other noninterest expense. Partially offsetting these decreases was higher expenses in several categories during 2013 due to the full integration of our two acquisitions that occurred in 2012.

We had $0.8 million in merger related expense for the year ended December 31, 2013 compared to $6.0 million in 2012. The $0.8 million of merger related expense recognized in 2013 primarily related to the data processing system conversion of Gateway Bank. Although the Gateway Bank acquisition occurred in August 2012, the merger with S&T Bank and the system conversion was completed on February 8, 2013. The $6.0 million of merger related expense in 2012 related to our acquisition of Mainline Bancorp, Inc., or Mainline, on March 9, 2012 and Gateway Bank of Pennsylvania, or Gateway, on August 13, 2012.

Salaries and employee benefits increased $2.9 million during 2013 due to additional employees, annual merit increases, higher commissions and incentives and severance. Increases consisted of $1.3 million due to the number of net new employees from our two acquisitions in the prior year and the opening of our LPO in northeast Ohio in August 2012, as well as to the hiring of additional employees throughout our organization. Adding to the increase was our annual salary merit increase of $0.8 million and $0.5 million in severance. Commission and incentive expense increased by $1.8 million due to increased loan production and strong performance in our other business lines. Offsetting these increases was a decrease in pension expense of $1.1 million, resulting from a change in actuarial assumptions. Stock compensation expense decreased $0.4 million in 2013 because there was no new management incentive plan for 2013.

Data processing, occupancy and other taxes increased for the year ended December 31, 2013. Data processing increased $0.9 million compared to the previous year due to increased processing charges resulting from our acquisitions, the annual increase with our third party data processor and the implementation of software that significantly strengthens the authentication of our customers that use our online banking product. Occupancy increased $0.4 million primarily due to additional branch locations resulting from our two acquisitions. Offsetting this increase was savings from the closure of two branches and two drive-up facilities during 2013. The increase of $0.5 million in other taxes primarily related to the additional shares tax obligations that we assumed with the acquisitions of Mainline and Gateway.

Furniture and equipment, professional services and legal, marketing and FDIC insurance expense decreased during the year ended December 31, 2013 when compared to 2012. Furniture and equipment expense declined $0.4 million due to a decrease in depreciation expense related to assets acquired in 2008 that were fully depreciated during 2013. Marketing expense decreased $0.3 million due to fewer customer promotions in 2013. FDIC charges are based in part on financial ratios which have improved during 2013, resulting in a decrease of $0.2 million when compared with the year ended December 31, 2012.

37

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Professional services and legal expense decreased $0.4 million compared to 2012 because additional external accounting and consulting charges were incurred in the first quarter of 2012.

Other noninterest expense decreased $3.9 million for the year ended December 31, 2013 as compared to the year ended December 31, 2012. The decreases in other noninterest expense were primarily due to decreases of $1.9 million in the reserve for unfunded loan commitments and $1.7 million in OREO expense due to improving asset quality. Other noninterest expense also decreased $0.5 million due to the reversal of a contingent liability for an Internal Revenue Service, or IRS, proposed penalty for tax year 2010. The contingent liability was assumed with the acquisition of Mainline in 2012 and was reversed when we received notice during 2013 that the IRS had waived the $0.5 million penalty.

Our efficiency ratio, which measures noninterest expense as a percent of noninterest income plus net interest income, on a FTE basis, excluding security gains/losses, was 60 percent for 2013 and 65 percent for 2012. Refer to page 65 Explanation of Use of Non-GAAP Financial Measures for a discussion of this non-GAAP financial measure.

Federal Income Taxes

We recorded a federal income tax provision of $14.5 million in 2013 compared to $7.3 million in 2012. The effective tax rate, which is the provision for income taxes as a percentage of pretax income was 22.3 percent in 2013 compared to 17.5 percent in 2012. We ordinarily generate an annual effective tax rate that is less than the statutory rate of 35 percent due to benefits resulting from tax-exempt interest, excludable dividend income, tax-exempt income on BOLI and tax benefits associated with LIHTC. The increase to our effective tax rate was primarily due to an increase of $23.6 million in pre-tax income which diluted the permanent benefits listed above.

Financial Condition

December 31, 2014

Total assets increased $431.5 million, or 9.5 percent, to $5.0 billion as of December 31, 2014 compared to $4.5 billion at December 31, 2013. Loan production was strong, resulting in an increase in total portfolio loans of $302.5 million, or 8.5 percent. Our commercial loan portfolio grew by $298.6 million, or 11.5 percent, to $2.9 billion while our consumer loan portfolio was relatively unchanged at $1.0 billion. Securities increased $130.8 million, or 25.7 percent, compared to December 31, 2013 due to the investment of cash held at the Federal Reserve into higher yielding securities.

Our deposit base increased $236.5 million, or 6.4 percent, with total deposits of $3.9 billion at December 31, 2014 compared to $3.7 billion December 31, 2013. We experienced increases in all deposit categories except for a slight decline in CDs. Noninterest-bearing demand had strong growth with an increase of $91.1 million, or 9.1 percent. Money market increased $95.2 million, or 33.8 percent, compared to December 31, 2013. During the fourth quarter of 2014, we began to participate in Insured Network Deposits, or IND, and had $69.5 million of IND balance within money market accounts at December 31, 2014. Savings deposits increased $32.3 million, or 3.2 percent, compared to December 31, 2013. Short-term borrowings increased $150.0 million compared to December 31, 2013 primarily to fund our asset growth in 2014.

Total shareholder’s equity increased by $37.1 million, or 6.5 percent, compared to December 31, 2013. The increase was primarily due to net income of $57.9 million offset by $20.2 million in dividends.

38

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Securities Activity

The balances and average rates of our securities are presented below as of December 31:

	2014				2013				2012
(dollars in thousands)	Balance		Average Rate		Balance		Average Rate		Balance		Average Rate
U.S. Treasury securities	$	14,880	1.24	%	$	—	—	%	$	—	—	%
Obligations of U.S. government corporations and agencies	269,285		1.65	%	234,751		1.52	%	212,066		1.62	%
Collateralized mortgage obligations of U.S. government corporations and agencies	118,006		2.28	%	63,774		2.38	%	57,896		2.70	%
Residential mortgage-backed securities of U.S. government corporations and agencies	46,668		2.87	%	48,669		3.02	%	50,623		3.56	%
Commercial mortgage-backed securities of U.S. government corporations and agencies	39,673		1.94	%	39,052		1.95	%	10,158		1.21	%
Obligations of states and political subdivisions	142,702		4.36	%	114,264		4.54	%	112,767		4.26	%
Marketable equity securities	9,059		4.08	%	8,915		4.14	%	8,756		4.96	%
Total Securities Available-for-Sale	$	640,273	2.50	%	$	509,425	2.53	%	$	452,266	2.64	%

We invest in various securities in order to provide a source of liquidity, satisfy various pledging requirements, increase net interest income and as a tool of the ALCO to reposition the balance sheet for interest rate risk purposes. Securities are subject to market risks that could negatively affect the level of liquidity available to us. Security purchases are subject to an investment policy approved annually by our Board of Directors and administered through ALCO and our treasury function. The securities portfolio increased $130.8 million, or 25.7 percent, from December 31, 2013. The increase is primarily due to the investment of cash into higher yielding assets.

Management evaluates the securities portfolio for OTTI on a quarterly basis. At December 31, 2014, our bond portfolio was in a net unrealized gain position of $9.3 million, compared to net unrealized loss position of $2.3 million at December 31, 2013. At December 31, 2014, total gross unrealized gains were $11.2 million offset by total gross unrealized losses of $1.8 million. Total gross unrealized losses were $7.8 million offset by total gross unrealized gains of $5.5 million at December 31, 2013. The increase in the value of our securities portfolio was a result of the changing interest rate environment in 2014. Unrealized losses were not related to the underlying credit quality of the bond portfolio. All debt securities are determined to be investment grade and are paying principal and interest according to the contractual terms of the securities. There were no unrealized losses on marketable equity securities as of December 31, 2014. We do not intend to sell and it is more likely than not that we will not be required to sell any of the securities in an unrealized loss position before recovery of their amortized cost. We did not record any OTTI in 2014 or 2013 and no significant impairments were recorded in 2012. The performance of the debt and equity securities markets could generate impairments in future periods requiring realized losses to be reported.

39

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

The following table sets forth the maturities of securities at December 31, 2014 and the weighted average yields of such securities. Taxable-equivalent adjustments (using a 35 percent federal income tax rate) for 2014 have been made in calculating yields on obligations of state and political subdivisions.

	Maturing
	Within One Year				After One But Within Five Years				After Five But Within Ten Years				After Ten Years				No Fixed Maturity
(dollars in thousands)	Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield
Available-for-Sale
U.S. Treasury securities	$	—	—	%	$	14,880	1.24	%	$	—	—	%	$	—	—	%	$	—	—	%
Obligations of U.S. government corporations and agencies	15,184		1.90	%	178,435		1.39	%	75,666		2.20	%	—		—	%	—		—%
Collateralized mortgage obligations of U.S. government corporations and agencies	—		—	%	—		—	%	—		—	%	118,006		2.28	%	—		—%
Residential mortgage-backed securities of U.S. government corporations and agencies	—		—	%	3,165		4.39	%	2,503		5.18	%	41,000		2.61	%	—		—%
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		—	%	30,638		1.69	%	9,035		2.77	%	—		—		—		—%
Obligations of states and political subdivisions	6,155		5.73	%	3,868		6.73	%	27,122		3.97	%	105,557		4.30	%	—		—%
Marketable equity securities	—		—	%	—		—	%	—		—	%	—		—	%	9,059		4.08	%
Total	$	21,339			$	230,986			$	114,326			$	264,563			$	9,059
Weighted Average Yield			3.00	%			1.55	%			2.73	%			3.14	%			4.08	%

40

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Lending Activity

The following table summarizes our loan portfolio as of December 31:

	2014				2013				2012				2011				2010
(dollars in thousands)	Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total
Commercial
Commercial real estate	$	1,682,236	43.48	%	$	1,607,756	45.09	%	$	1,452,133	43.39	%	$	1,415,333	45.22	%	$	1,494,202	44.53	%
Commercial and industrial	994,138		25.70	%	842,449		23.62	%	791,396		23.65	%	685,753		21.91	%	722,359		21.52	%
Commercial construction	216,148		5.59	%	143,675		4.03	%	168,143		5.02	%	188,852		6.04	%	259,598		7.74	%
Total Commercial Loans	2,892,522		74.77	%	2,593,880		72.74	%	2,411,672		72.06	%	2,289,938		73.17	%	2,476,159		73.79	%
Consumer
Residential mortgage	489,586		12.65	%	487,092		13.66	%	427,303		12.77	%	358,846		11.47	%	359,536		10.71	%
Home equity	418,563		10.82	%	414,195		11.61	%	431,335		12.89	%	411,404		13.14	%	441,096		13.15	%
Installment and other consumer	65,567		1.69	%	67,883		1.90	%	73,875		2.21	%	67,131		2.14	%	74,780		2.23	%
Consumer construction	2,508		0.06	%	3,149		0.09	%	2,437		0.07	%	2,440		0.08	%	4,019		0.12	%
Total Consumer Loans	976,224		25.23	%	972,319		27.26	%	934,950		27.94	%	839,821		26.83	%	879,431		26.21	%
Total Portfolio Loans	$	3,868,746	100.00	%	$	3,566,199	100.00	%	$	3,346,622	100.00	%	$	3,129,759	100.00	%	$	3,355,590	100.00	%

The loan portfolio represents the most significant source of interest income for us. The risk that borrowers will be unable to pay such obligations is inherent in the loan portfolio. Other conditions such as downturns in the borrower’s industry or the overall economic climate can significantly impact the borrower’s ability to pay.

Total portfolio loans increased $302.5 million, or 8.5 percent, since December 31, 2013, to $3.9 billion at December 31, 2014 primarily due to organic loan growth in our CRE, C&I and commercial construction portfolios. Our expansion into Ohio, with the establishment of two LPOs, has been successful and contributed approximately $146.0 million, or 48 percent, of our total loan growth in 2014. Further driving loan growth was the expansion of our sales team with the addition of commercial lenders in various markets throughout 2014. Total commercial loans have increased $298.6 million, or 11.5 percent, from December 31, 2013 with growth in all portfolios. CRE loans have increased $74.5 million, or 4.6 percent, due to strong loan demand. C&I loans increased $151.7 million, or 18.0 percent, due to new loan originations and increased utilization of lines of credit. Commercial construction loans have increased $72.5 million, or 50.4 percent, due to strong loan demand and line utilizations.

Commercial loans, including CRE, C&I and commercial construction, comprised 75 percent and 73 percent of total portfolio loans at December 31, 2014 and 2013. Although commercial loans can have a relatively higher risk profile, management believes these risks are mitigated through active portfolio management, conservative underwriting standards and continuous portfolio review. The loan-to-value, or LTV, policy guidelines for CRE loans are generally 65-80 percent. At December 31, 2014, variable commercial loans were 79 percent of the total commercial loans compared to 78 percent in 2013.

Consumer loans represent 25 percent of our loan portfolio at December 31, 2014 compared to 27 percent at December 31, 2013. Residential mortgage lending continues to be a focus through a centralized mortgage origination department, ongoing product redesign, secondary market activities and the utilization of commission compensated originators. Management believes that continued adherence to our conservative mortgage lending policies for portfolio loans will be as important in a growing economy as it was during the downturn in recent years. The LTV policy guideline is 80 percent for residential first lien mortgages. Higher LTV loans may be approved with the appropriate private mortgage insurance coverage. Our policy is to only permit portfolio loans with a maximum term of 20 years for traditional mortgages to our credit-worthy borrowers, and 15 years with a maximum amortization term of 30 years for balloon payment mortgages. We may originate home equity loans with a lien position that is second to unrelated third party lenders, but normally only to the extent that the combined LTV considering both the first and second liens does not exceed 100 percent of the fair value of the property. Combo mortgage loans consisting of a residential first mortgage and a home equity second mortgage are also available to credit worthy borrowers.

41

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

We originate and price loans for sale into the secondary market, primarily to Fannie Mae. At the end of the second quarter of 2014, we returned to selling all of our mortgage loan production priced for sale in the secondary market. Previously, we had been retaining 10, 15 and 20 year residential real estate loans in our portfolio and selling only 30 year mortgages in the secondary market. The rationale for these sales is to mitigate interest-rate risk associated with holding lower rate, long-term residential mortgages in the loan portfolio, to generate fee revenue from sales and servicing and to maintain the primary customer relationship. During 2014 and 2013, we sold $40.1 million and $62.9 million, of 1-4 family mortgages to Fannie Mae and currently service $327.2 million of secondary market mortgage loans at December 31, 2014 compared to $327.4 million at December 31, 2013. Loans sold to Fannie Mae in 2014 decreased compared to 2013 due to the increase in interest rates that occurred in the second half of 2013 which caused a significant decline in mortgage refinancings.

We also offer a variety of unsecured and secured consumer loan and credit card products. LTV guidelines for direct loans are generally 90-100 percent of invoice for new automobiles and 80-90 percent of National Automobile Dealer Association value for used automobiles.

We maintain a General Lending Policy to control the quality of our loan portfolio. The policy delegates the authority to extend loans under specific guidelines and underwriting standards. The General Lending Policy is formulated by management and reviewed and ratified annually by the Board of Directors. Any exception to the General Lending Policy must be approved by the Senior Loan Committee or the Regional Loan Committee.

The following table presents the maturity of consumer and commercial loans outstanding as of December 31, 2014:

	Maturity
(dollars in thousands)	Within One Year		After One But Within Five Years		After Five Years		Total
Fixed interest rates	$	160,136	$	318,585	$	134,265	$	612,986
Variable interest rates	609,010		718,986		951,540		2,279,536
Total Commercial Loans	$	769,146	$	1,037,571	$	1,085,805	$	2,892,522
Fixed interest rates	64,063		223,526		262,247		549,836
Variable interest rates	298,374		39,372		88,642		426,388
Total Consumer Loans	$	362,437	$	262,898	$	350,889	$	976,224
Total Portfolio Loans	$	1,131,583	$	1,300,469	$	1,436,694	$	3,868,746

Credit Quality

On a quarterly basis, a criticized asset meeting is held to monitor all special mention and substandard loans greater than $0.5 million. These loans typically represent the highest risk of loss to us. Action plans are established and these loans are monitored through regular contact with the borrower, review of current financial information and other documentation, review of all loan or potential loan restructures/modifications and the regular re-evaluation of assets held as collateral.

Additional credit risk management practices include periodic review and update to our lending policies and procedures to support sound underwriting practices and portfolio management through portfolio stress testing. Our Loan Review process serves to independently monitor credit quality and assess the effectiveness of credit risk management practices to provide oversight of all corporate lending activities. Loan Review has the primary responsibility for assessing commercial credit administration and credit decision functions of consumer and mortgage underwriting, as well as providing input to the loan risk rating process.

42

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Nonperforming assets, or NPAs, consist of nonaccrual loans, nonaccrual TDRs and OREO. The following represents NPAs for the years presented:

(dollars in thousands)	2014			2013			2012			2011			2010
Nonperforming Loans
Commercial real estate	$	2,255		$	6,852		$	20,972		$	20,777		$	14,674
Commercial and industrial	1,266			1,412			5,496			7,570			2,567
Commercial construction	105			34			1,454			3,604			5,844
Residential mortgage	1,877			1,982			4,526			2,859			5,996
Home equity	1,497			2,073			3,312			2,936			1,433
Installment and other consumer	21			34			40			4			65
Consumer construction	—			—			218			181			525
Total Nonperforming Loans	7,021			12,387			36,018			37,931			31,104
Nonperforming Troubled Debt Restructurings
Commercial real estate	2,180			3,898			9,584			10,871			29,636
Commercial and industrial	356			1,884			939			—			1,000
Commercial construction	1,869			2,708			5,324			2,943			2,143
Residential mortgage	459			1,356			2,752			4,370			—
Home Equity	562			218			341			—			—
Installment and other consumer	10			3			—			—			—
Total Nonperforming Troubled Debt Restructurings	5,436			10,067			18,940			18,184			32,779
Total Nonperforming Loans	12,457			22,454			54,958			56,115			63,883
OREO	166			410			911			3,967			5,820
Total Nonperforming Assets	$	12,623		$	22,864		$	55,869		$	60,082		$	69,703
Nonperforming loans as a percent of total loans	0.32		%	0.63		%	1.63		%	1.79		%	1.90		%
Nonperforming assets as a percent of total loans plus OREO	0.33		%	0.64		%	1.66		%	1.92		%	2.07		%

Our policy is to place loans in all categories in nonaccrual status when collection of interest or principal is doubtful, or generally when interest or principal payments are 90 days or more past due. There were no loans 90 days or more past due and still accruing at December 31, 2014 or December 31, 2013.

NPAs decreased $10.2 million, or 45 percent, to $12.6 million at December 31, 2014 compared to $22.9 million at December 31, 2013. The significant decline in NPAs can be attributed to the continued improvement of economic conditions in our markets and a strategic focus on actively managing and bringing to resolution our problem loans. NPAs decreased primarilydue to $8.1 million in nonperforming loan pay downs, $4.4 million of nonperforming loans returning to accrual status, the sale of $3.2 million of nonperforming loans and $2.0 million of nonperforming loan charge-offs. During 2014, we had approximately $8.0 million of new nonperforming loans compared to $16.5 million in 2013.

TDRs are loans where we, for economic or legal reasons related to a borrower’s financial difficulties, grant a concession to the borrower that we would not otherwise grant. These modified terms generally include extensions of maturity dates at a stated interest rate lower than the current market rate for a new loan with similar risk characteristics, reductions in contractual interest rates or principal deferment. While unusual there may be instances of principal forgiveness. Generally these concessions are for a period of at least six months. Additionally, we classify loans where the debt obligation has been discharged through a Chapter 7 Bankruptcy and not reaffirmed by the borrower as TDRs.

TDRs can be returned to accruing status if the following criteria are met: 1) the ultimate collectability of all contractual amounts due, according to the restructured agreement, is not in doubt and 2) there is a period of a minimum of six months of satisfactory payment performance by the borrower either immediately before or after the restructuring. All TDRs are considered to be impaired loans and will be reported as impaired loans for their remaining lives, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and we fully expect that the remaining principal and interest will be collected according to the

43

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

restructured agreement. All impaired loans are reported as nonaccrual loans unless the loan is a TDR that has met the requirements noted above to be returned to accruing status.

As an example, consider a substandard commercial construction loan that is currently 90 days past due where the loan is restructured to extend the maturity date for a period longer than would be considered an insignificant period of time. The post-modification interest rate is not increased to correspond with the current credit risk of the borrower and all other terms remain the same according to the original loan agreement. This loan will be considered a TDR as the borrower is experiencing financial difficulty and a concession has been granted. The loan will be reported as nonaccrual and as an impaired loan and a TDR. In addition, the loan could be charged down to the fair value of the collateral if a confirmed loss exists. If the loan subsequently performs, by means of making on-time principal and interest payments according to the newly restructured terms for a period of six months, and it is expected that all remaining principal and interest will be collected according to the terms of the restructured agreement, the loan will be returned to accrual status and reported as an accruing TDR. The loan will remain an impaired loan for the remaining life of the loan because the interest rate was not adjusted to be equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk.

As of December 31, 2014, we had $42.4 million in total TDRs, including $37.0 million that were performing and $5.4 million that were nonperforming. This is a decrease from December 31, 2013 when we had $49.3 million in TDRs, including $39.2 million that were performing and $10.1 million that were nonperforming. Loan modifications resulting in TDRs, declined in 2014 with 44 modifications or $4.9 million of new TDRs compared to 71 modification or $11.8 million of new TDRs in 2013. Included in the 2014 new TDRs was 29 loans totaling $1.1 million related to Chapter 7 bankruptcy filings that were not reaffirmed resulting in discharged debt which compares to 56 loans totaling $2.0 million in 2013. For the year ended December 31, 2014 we had nine TDRs for $1.9 million that met the above requirements for being returned to performing status.

44

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

The following represents delinquency as of December 31:

	2014				2013				2012				2011				2010
(dollars in thousands)	Amount		% of Loans		Amount		% of Loans		Amount		% of Loans		Amount		% of Loans		Amount		% of Loans
90 days or more:
Commercial real estate	$	4,435	0.26	%	$	10,750	0.67	%	$	30,556	2.10	%	$	31,648	2.24	%	$	44,310	2.97	%
Commercial and Industrial	1,622		0.16	%	3,296		0.39	%	6,435		0.81	%	7,570		1.10	%	3,567		0.49	%
Commercial construction	1,974		0.91	%	2,742		1.91	%	6,778		4.03	%	6,547		3.47	%	7,987		3.08	%
Residential mortgage	2,336		0.48	%	3,338		0.69	%	7,278		1.70	%	7,229		2.01	%	5,996		1.67	%
Home equity	2,059		0.49	%	2,291		0.55	%	3,653		0.85	%	2,936		0.71	%	1,433		0.32	%
Installment and other consumer	31		0.05	%	37		0.05	%	40		0.05	%	4		0.01	%	65		0.09	%
Consumer construction	—		—		—		—		218		8.95	%	181		7.42	%	525		13.06	%
Total Loans	$	12,457	0.32	%	$	22,454	0.63	%	$	54,958	1.64	%	$	56,115	1.79	%	$	63,883	1.90	%
30 to 89 days:
Commercial real estate	$	2,871	0.17	%	$	1,416	0.09	%	$	2,643	0.18	%	$	9,105	0.64	%	$	4,371	0.29	%
Commercial and industrial	1,380		0.14	%	2,877		0.34	%	4,646		0.59	%	5,284		0.77	%	1,714		0.24	%
Commercial construction	—		—	%	1,800		1.25	%	10,542		6.27	%	—		—		835		0.32	%
Residential mortgage	1,785		0.36	%	2,494		0.51	%	3,661		0.86	%	2,403		0.67	%	1,346		0.37	%
Home equity	2,201		0.53	%	3,127		0.75	%	3,197		0.74	%	2,890		0.70	%	2,451		0.56	%
Installment and other consumer	425		0.65	%	426		0.63	%	501		0.68	%	452		0.67	%	342		0.46	%
Consumer construction	—		—		—		—		—		—		—		—		—		—
Total Loans	$	8,662	0.22	%	$	12,140	0.34	%	$	25,190	0.75	%	$	20,134	0.64	%	$	11,059	0.33	%

Closed-end installment loans, amortizing loans secured by real estate and any other loans with payments scheduled monthly are reported past due when the borrower is in arrears two or more monthly payments. Other multi-payment obligations with payments scheduled other than monthly are reported past due when one scheduled payment is due and unpaid for 30 days or more. We monitor delinquency on a monthly basis, including early stage delinquencies of 30 to 89 days past due for early identification of potential problem loans.

Loans past due 90 days or more decreased $10.0 million, or 45 percent, compared to December 31, 2013 and represent only 0.32 percent of total loans at December 31, 2014. Loans past due by 30 to 89 days decreased $3.5 million, or 29 percent, representing only 0.22 percent of total loans at December 31, 2014. Delinquency improved in all loan categories throughout 2014 due to improved economic conditions and management’s focus on actively managing delinquent loans.

Allowance for Loan Losses

We maintain an ALL at a level determined to be adequate to absorb estimated probable credit losses inherent within the loan portfolio as of the balance sheet date. Determination of an adequate ALL is inherently subjective and may be subject to significant changes from period to period. The methodology for determining the ALL has two main components: evaluation and impairment tests of individual loans and impairment tests of certain groups of homogeneous loans with similar risk characteristics.

Consumer unsecured loans and secured loans that are not real estate secured are evaluated for charge-off after the loan becomes 90 days past due. At that time, unsecured loans are fully charged-off and secured loans are charged-off to the estimated

45

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

fair value of the collateral less the cost to sell. Consumer loans secured by real estate are evaluated for charge-off after the loan balance becomes 90 days past due and are charged down to the estimated fair value of the collateral less cost to sell.

Our charge-off policy for commercial loans requires that loans and other obligations that are not collectible be promptly charged-off when the loss becomes probable, regardless of the delinquency status of the loan. We may elect to recognize a partial charge-off when management has determined that the value of collateral is less than the remaining investment in the loan. A loan or obligation does not need to be charged-off, regardless of delinquency status, if (i) management has determined there exists sufficient collateral to protect the remaining loan balance and (ii) there exists a strategy to liquidate the collateral. Management may also consider a number of other factors to determine when a charge-off is appropriate. These factors may include, but are not limited to:

• The status of a bankruptcy proceeding

• The value of collateral and probability of successful liquidation; and/or

• The status of adverse proceedings or litigation that may result in collection

The following summarizes our loan charge-off experience for each of the five years presented below:

	Years Ended December 31,
(dollars in thousands)	2014			2013			2012			2011			2010
ALL Balance at Beginning of Year:	$	46,255		$	46,484		$	48,841		$	51,387		$	59,580
Charge-offs:
Commercial real estate	(2,041		)	(4,601		)	(9,627		)	(8,824		)	(23,925		)
Commercial and industrial	(1,267		)	(2,714		)	(5,278		)	(8,971		)	(7,277		)
Commercial construction	(712		)	(4,852		)	(10,521		)	(1,720		)	(6,353		)
Consumer real estate	(1,200		)	(2,407		)	(2,509		)	(2,617		)	(2,210		)
Other consumer	(1,133		)	(1,002		)	(1,078		)	(1,013		)	(1,262		)
Total	(6,353		)	(15,576		)	(29,013		)	(23,145		)	(41,027		)
Recoveries:
Commercial real estate	1,798			3,388			1,259			780			576
Commercial and industrial	3,647			2,142			1,153			357			328
Commercial construction	146			531			891			2,463			1,748
Consumer real estate	350			651			197			1,030			202
Other consumer	353			324			341			360			469
Total	6,294			7,036			3,841			4,990			3,323
Net Charge-offs	(59		)	(8,540		)	(25,172		)	(18,155		)	(37,704		)
Provision for loan losses	1,715			8,311			22,815			15,609			29,511
ALL Balance at End of Year:	$	47,911		$	46,255		$	46,484		$	48,841		$	51,387

Net loan charge-offs decreased $8.5 million to only $0.1 million, or 0.00 percent of average loans for 2014 as compared to $8.5 million or 0.25 percent of average loans for 2013. The decrease in net charge-offs is due to improved economic conditions and management’s continued focus on workouts with our problem loans in 2014. Net charge-offs declined in all commercial loan segments compared to 2013. C&I loans had a net recovery of $2.4 million which included a recovery from one borrower for $2.5 million. During 2014, we sold a $3.5 million package of smaller commercial loans, $3.2 million of which were on nonaccrual status, resulting in a charge-off of $1.3 million. We also sold a $4.8 million relationship that resulted in a $1.5 million charge-off, including a $0.8 million CRE charge-off and a $0.7 million construction charge-off.

46

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

The following table summarizes net charge-offs as a percentage of average loans and other ratios as of December 31:

	2014		2013		2012		2011		2010
Commercial real estate	0.01	%	0.08	%	0.59	%	0.55	%	1.42	%
Commercial and industrial	(0.26	)%	0.07	%	0.57	%	1.24	%	1.62	%
Commercial construction	0.32	%	2.72	%	5.94	%	(0.34	)%	0.96	%
Consumer real estate	0.09	%	0.20	%	0.28	%	0.20	%	0.24	%
Other consumer	1.19	%	0.99	%	0.91	%	0.94	%	1.04	%
Net charge-offs to average loans outstanding	0.00	%	0.25	%	0.78	%	0.56	%	1.11	%
Allowance for loan losses as a percentage of total loans	1.24	%	1.30	%	1.38	%	1.56	%	1.53	%
Allowance for loan losses to total nonperforming loans	385	%	206	%	85	%	87	%	80	%
Provision for loan losses as a percentage of net loan charge-offs	NM		97	%	91	%	86	%	78	%

NM - percentage not meaningful

An inherent risk to the loan portfolio as a whole is the condition of the local economy. In addition, each loan segment carries with it risks specific to the segment. We develop and document a systematic ALL methodology based on the following portfolio segments: 1) CRE, 2) C&I, 3) Commercial Construction, 4) Consumer Real Estate and 5) Other Consumer.

CRE loans are secured by commercial purpose real estate, including both owner occupied properties and investment properties for various purposes such as hotels, strip malls and apartments. Operations of the individual projects as well as global cash flows of the debtors are the primary sources of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the collateral type as well as the business prospects of the lessee, if the project is not owner occupied.

C&I loans are made to operating companies or manufacturers for the purpose of production, operating capacity, accounts receivable, inventory or equipment financing. Cash flow from the operations of the company is the primary source of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the industry of the company. Collateral for these types of loans often do not have sufficient value in a distressed or liquidation scenario to satisfy the outstanding debt.

Commercial construction loans are made to finance construction of buildings or other structures, as well as to finance the acquisition and development of raw land for various purposes. While the risk of these loans is generally confined to the construction period, if there are problems, the project may not be completed, and as such, may not provide sufficient cash flow on its own to service the debt or have sufficient value in a liquidation to cover the outstanding principal. The condition of the local economy is an important indicator of risk, but there are also more risks depending on the type of project and the experience and resources of the developer.

Consumer real estate loans are secured by first and second lien such as home equity loans, home equity lines of credit and 1-4 family residences, including purchase money mortgages. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk of this segment. The state of the local housing markets can also have a significant impact on this segment because low demand and/or declining home values can limit the ability of borrowers to sell a property and satisfy the debt.

Other consumer loans are made to individuals and may be secured by assets other than 1-4 family residences, as well as unsecured loans. This segment includes auto loans, unsecured loans and lines and credit cards. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The value of the collateral, if there is any, is less likely to be a source of repayment due to less certain collateral values.

47

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

The following is the ALL balance by portfolio segment as of December 31:

	2014				2013				2012				2011				2010
(dollars in thousands)	Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total		Amount		% of Total
Commercial real estate	$	20,164	42	%	$	18,921	41	%	$	25,246	54	%	$	29,804	61	%	$	30,424	59	%
Commercial and industrial	13,668		28	%	14,443		31	%	7,759		17	%	11,274		23	%	9,777		19	%
Commercial construction	6,093		13	%	5,374		12	%	7,500		16	%	3,703		8	%	5,905		11	%
Consumer real estate	6,333		13	%	6,362		14	%	5,058		11	%	3,166		6	%	3,962		8	%
Other consumer	1,653		4	%	1,165		2	%	921		2	%	894		2	%	1,319		3	%
Total	$	47,911	100	%	$	46,265	100	%	$	46,484	100	%	$	48,841	100	%	$	51,387	100	%

Significant to our ALL is a higher concentration of commercial loans. At December 31, 2014, approximately 83 percent of the ALL related to the commercial loan portfolio, while commercial loans comprised 75 percent of our loan portfolio. We experienced higher losses in our commercial portfolios compared to our consumer portfolio throughout the economic crisis. The ability of borrowers to repay commercial loans is more dependent upon the success of their business and general economic conditions. Accordingly, the risk of loss may be higher on such loans compared to consumer loans, which have incurred lower losses in our market.

Due to the greater potential for loss within our commercial portfolio, we monitor the commercial loan portfolio through an internal risk rating system. Loan risk ratings are assigned based upon the creditworthiness of the borrower and are reviewed on an ongoing basis according to our internal policies. Loans rated special mention or substandard have potential or well-defined weaknesses not generally found in high quality, performing loans, and require attention from management to limit loss.

The following table summarizes the ALL balance as of December 31:

(dollars in thousands)	2014		2013		2012		2011		2010
Collectively Evaluated for Impairment	$	47,857	$	46,158	$	44,253	$	43,296	$	47,756
Individually Evaluated for Impairment	54		97		2,231		5,545		3,631
Total Allowance for Loan Losses	$	47,911	$	46,255	$	46,484	$	48,841	$	51,387

The ALL was $47.9 million, or 1.24 percent of total loans, at December 31, 2014 as compared to $46.3 million, or 1.30 percent of total loans at December 31, 2013. Overall, the total ALL and the composition of the ALL remained relatively consistent with December 31, 2013. Impaired loans decreased $8.9 million, or 17 percent, from December 31, 2013, primarily a result of loan pay downs and charge-offs. New impaired loan formation has been low during 2014 with only $5.8 million of new impaired loans resulting in minimal specific reserves at December 31, 2014. The reserve for loans collectively evaluated for impairment did not change significantly at December 31, 2014 compared to December 31, 2013.While we have been experiencing improvement in our asset quality, we still believe that there is inherent risk within the portfolio and have maintained the level of the reserve relatively consistent with the prior year.

Federal Home Loan Bank and Other Restricted Stock

At December 31, 2014 and 2013, we held FHLB stock of $14.3 million and $12.8 million. This investment is carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. We hold FHLB stock because we are a member of the FHLB of Pittsburgh. The FHLB requires members to purchase and hold a specified level of FHLB stock based upon on the members’ asset values, level of borrowings and participation in other programs offered. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of the FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value. We reviewed and evaluated the FHLB capital stock for OTTI at December 31, 2014. The FHLB reported improved earnings throughout 2014 compared to 2013 and continues to exceed all capital ratios required. Additionally, we considered that the FHLB has been paying dividends and redeeming excess stock throughout 2014. Accordingly, we believe sufficient evidence exists to conclude that no OTTI exists at December 31, 2014.

48

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

At December 31, 2014 and 2013, we held Atlantic Community Bankers’ Bank, or ACBB, stock of $0.8 million for both years. This investment is carried at cost and evaluated for impairment based on the ultimate recoverability of the investment. Like FHLB stock, members purchase ACBB stock to access the products and services offered, as opposed to traditional equity investors who acquire stock for purposes such as appreciation in value. S&T acquired the ACBB stock as a result of bank acquisitions and does not use the bank’s member services. ACBB continues to be classified as well capitalized by regulatory guidelines and the current purchase price for new members is $3,500 per share. As of December 31, 2014, the book value of ACBB stock was $2,024 per share; therefore, management believes that no OTTI exists at December 31, 2014.

Deposits

The following table presents the composition of deposits at December 31:

(dollars in thousands)	2014		2013		$ Change
Noninterest-bearing demand	$	1,083,919	$	992,779	$	91,140
Interest-bearing demand	333,015		312,790		20,225
Money market	309,245		281,403		27,842
Savings	1,027,095		994,805		32,290
Certificates of deposit	933,210		922,780		10,430
Brokered deposits	222,358		167,751		54,607
Total	$	3,908,842	$	3,672,308	$	236,534

Deposits are the primary source of funds for us. We believe that our deposit base is stable and that we have the ability to attract new deposits, mitigating any funding dependency on other more volatile sources. Total deposits increased $236.5 million, or 6.4 percent mostly due to strong growth in our customer deposits. Overall, customer deposits increased $181.9 million, or 5.2 percent of total deposits from December 31, 2013. Customer deposit growth included a $91.1, or 9.2 percent, increase in noninterest-bearing demand, a $20.2, or 6.5 percent, increase in interest-bearing demand, a $27.8, or 9.9 percent, increase in money market, a $32.3, or 3.2 percent, increase in savings and $10.4, or 1.1 percent increase in CDs.

Our brokered deposits increased $54.6 million, or 32.6 percent, compared to December 31, 2013. Included in our brokered deposits are CDs issued through the Certificate of Deposit Account Registry Services, or CDARS and the Depository Trust Company, or DTC. Also included in brokered deposits are money market and interest bearing demand funds through the Insured Network Deposits, or IND, program. Brokered deposits are an additional source of funds utilized by ALCO as a way to diversify funding sources, as well as manage the bank's funding costs and structure.

The daily average balance of deposits and rates paid on deposits are summarized for the years ended December 31 in the following table:

	2014				2013				2012
(dollars in thousands)	Amount		Rate		Amount		Rate		Amount		Rate
Noninterest-bearing demand	$	1,046,605			$	955,475			$	877,056
Interest-bearing demand	321,907		0.02	%	309,748		0.02	%	306,994		0.05	%
Money market	321,294		0.16	%	319,831		0.14	%	308,719		0.17	%
Savings	1,033,482		0.16	%	1,001,209		0.17	%	902,889		0.26	%
Certificates of deposit	905,346		0.79	%	980,933		0.91	%	1,093,899		1.25	%
Brokered deposits	226,169		0.34	%	73,518		0.32	%	10,363		0.28	%
Total	$	3,854,803	0.31	%	$	3,640,714	0.48	%	$	3,499,920	0.70	%

CDs of $100,000 and over, including CDARS, accounted for 12 percent of total deposits at December 31, 2014 and 2013, and primarily represent deposit relationships with local customers in our market area.

49

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Maturities of certificates of deposit of $100,000 or more outstanding at December 31, 2014, including brokered deposits, are summarized as follows:

(dollars in thousands)	2014
Three months or less	$	213,566
Over three through six months	55,949
Over six through twelve months	57,480
Over twelve months	151,221
Total	$	478,216

Borrowings

The following table represents the composition of borrowings for the years ended December 31:

(dollars in thousands)	2014		2013		$ Change
Securities sold under repurchase agreements, retail	$	30,605	$	33,847	$	(3,242	)
Short-term borrowings	290,000		140,000		150,000
Long-term borrowings	19,442		21,810		(2,368		)
Junior subordinated debt securities	45,619		45,619		—
Total Borrowings	$	385,666	$	241,276	$	144,390

Borrowings are an additional source of funding for us. Short-term borrowings are for terms under one year and were comprised primarily of FHLB advances. We define repurchase agreements with our local retail customers as retail REPO. Securities pledged as collateral under these REPO financing arrangements cannot be sold or repledged by the secured party and are therefore accounted for as a secured borrowing. FHLB advances are for various terms secured by a blanket lien on residential mortgages and other real estate secured loans. Long-term borrowings are for terms greater than one year and consist of FHLB borrowings. The purpose of long-term borrowings is to match-fund selected new loan originations, to mitigate interest rate sensitivity risks and to take advantage of discounted borrowing rates through the FHLB for community investment projects. The increase in borrowings of $144.4 million is primarily within our short-term borrowings. Short-term borrowings were utilized as a source of funds to support our asset growth during 2014.

Information pertaining to short-term borrowings is summarized in the tables below:

	Securities Sold Under Repurchase Agreements
(dollars in thousands)	2014			2013			2012
Balance at December 31	$	30,605		$	33,847		$	62,582
Average balance during the year	28,372			54,057			47,388
Average interest rate during the year	0.01		%	0.12		%	0.17		%
Maximum month-end balance during the year	$	40,983		$	83,766		$	62,582
Average interest rate at December 31	0.01		%	0.01		%	0.20		%

	Short-Term Borrowings
(dollars in thousands)	2014			2013			2012
Balance at December 31	$	290,000		$	140,000		$	75,000
Average balance during the year	164,811			101,973			50,212
Average interest rate during the year	0.31		%	0.27		%	0.24		%
Maximum month-end balance during the year	$	290,000		$	175,000		$	75,000
Average interest rate at December 31	0.30		%	0.30		%	0.19		%

50

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Information pertaining to long-term borrowings is summarized in the tables below:

	Long-Term Borrowings
(dollars in thousands)	2014			2013			2012
Balance at December 31	$	19,442		$	21,810		$	34,101
Average balance during the year	20,571			24,312			33,841
Average interest rate during the year	3.00		%	3.07		%	3.26		%
Maximum month-end balance during the year	$	21,616		$	28,913		$	40,669
Average interest rate at December 31	2.97		%	3.01		%	3.17		%

	Junior Subordinated Debt Securities
(dollars in thousands)	2014			2013			2012
Balance at December 31	$	45,619		$	45,619		$	90,619
Average balance during the year	45,619			65,989			90,619
Average interest rate during the year	2.68		%	3.14		%	3.21		%
Maximum month-end balance during the year	$	45,619		$	90,619		$	90,619
Average interest rate at December 31	2.70		%	2.70		%	3.01		%

During 2014, long-term borrowings decreased $2.4 million as compared to December 31, 2013 due to normal amortization of these borrowings. At December 31, 2014, our long-term borrowings outstanding of $19.4 million included $16.3 million that were at a fixed rate and $3.1million at a variable rate.

During the third quarter of 2006, we issued $25.0 million of junior subordinated debentures through a pooled transaction at an initial fixed rate of 6.78 percent. Beginning September 15, 2011 and quarterly thereafter, we have had the option to redeem the subordinated debt, subject to a 30 day written notice and prior approval by the FDIC. The subordinated debt converted to a variable rate of 3-month LIBOR plus 160 basis points in September of 2011. The subordinated debt qualifies as Tier 2 capital under regulatory guidelines and will mature on December 15, 2036.

During the first quarter of 2008, we completed a private placement to a financial institution of $20.0 million of floating rate trust preferred securities. The trust preferred securities mature in March 2038, are callable at our option after five years and had an interest rate initially at a rate of 6.44 percent per annum and quarterly adjusts with the three-month LIBOR plus 350 basis points. We began making interest payments to the trustee on June 15, 2008 and quarterly thereafter. The trust preferred securities qualify as Tier 1 capital under regulatory guidelines. To issue these trust preferred securities, we formed STBA Capital Trust I, or the Trust, with $0.6 million of equity, which is owned 100 percent by us. The proceeds from the sale of the trust preferred securities and the issuance of common equity were invested in junior subordinated debt, which is the sole asset of the Trust. The Trust pays dividends on the trust preferred securities at the same rate as the interest we pay on the junior subordinate debt held by the Trust. Because the third-party investors are the primary beneficiaries, the Trust qualifies as a variable interest entity, but is not consolidated in our financial statements.

During the second quarter of 2008, we issued $20.0 million of junior subordinated debt through a private placement with three financial institutions at an initial rate of 6.40 percent that floats quarterly with 3-month LIBOR plus 350 basis points. The subordinated debt qualified as Tier 2 Capital under regulatory guidelines, but if all or any portion of the subordinated debt ceased to be deemed Tier 2 Capital due to a change in applicable capital regulations, we had the right to redeem, on any interest payment date, subject to a 30 day written notice and prior approval by the FDIC, the subordinated debt at the applicable redemption rate. The redemption rate started at a high of 102.82 percent at June 15, 2009 and decreased yearly to 100 percent on June 15, 2013 and thereafter could be called. We received approval from the FDIC to redeem early, and we did so on June 17, 2013. The subordinated debt would have matured on June 15, 2018.

Also during the second quarter of 2008, we issued $25.0 million of junior subordinated debt through a private placement with a financial institution at an initial rate of 5.15 percent that floats quarterly with 3-month LIBOR plus 250 basis points. At any time after May 30, 2013, we had the right to redeem all or a portion of the subordinated debt, subject to a 30-day written notice and prior approval by the FDIC. The subordinated debt qualified as Tier 2 capital under regulatory guidelines and would have matured on May 30, 2018. However, we received approval by the FDIC to redeem this junior subordinated debt early, and redeemed it also on June 17, 2013.

We chose to redeem $45.0 million of junior subordinated debt early not only because of its diminishing regulatory capital benefit, but also for a future positive impact on net interest income.

51

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Wealth Management Assets

As of December 31, 2014, the fair value of the S&T Bank Wealth Management assets under management and administration, or AUM, which are not accounted for as part of our assets, increased to $2.0 billion from $1.9 billion as of December 31, 2013. AUM consist of $1.1 billion in S&T Trust, $0.6 billion in S&T Financial Services and $0.3 billion in Stewart Capital Advisors. The increase in 2014 is primarily attributable to the improved performance of the U.S. and global capital markets and new business.

Explanation of Use of Non-GAAP Financial Measures

In addition to the results of operations presented in accordance with GAAP, our management uses, and this Report contains or references, certain non-GAAP financial measures, such as net interest income on a FTE basis, operating revenue and the efficiency ratio. We believe these non-GAAP financial measures provide information useful to investors in understanding our underlying operational performance and our business and performance trends as they facilitate comparisons with the performance of other companies in the financial services industry. Although we believe that these non-GAAP financial measures enhance investors’ understanding of our business and performance, these non-GAAP financial measures should not be considered an alternative to GAAP or considered to be more important than financial results determined in accordance with GAAP, nor is it necessarily comparable with non-GAAP measures which may be presented by other companies.

We believe the presentation of net interest income on a FTE basis ensures comparability of net interest income arising from both taxable and tax-exempt sources and is consistent with industry practice. Interest income per the Consolidated Statements of Net Income is reconciled to net interest income adjusted to a FTE basis on pages 27 and 33.

Operating revenue is the sum of net interest income plus noninterest income, excluding security gains/losses and non-recurring income and expenses. In order to understand the significance of net interest income to our business and operating results, we believe it is appropriate to evaluate the significance of net interest income as a component of operating revenue.

The efficiency ratio is recurring noninterest expense divided by recurring noninterest income plus net interest income, on a FTE basis, which ensures comparability of net interest income arising from both taxable and tax-exempt sources and is consistent with industry practice.

Common return on average tangible assets, common return on average tangible common equity and the ratio of tangible common equity to tangible assets exclude goodwill, other intangible assets and preferred equity in order to show the significance of the tangible elements of our assets and common equity. Total assets and total average assets are reconciled to total tangible assets and total tangible average assets on page19. Total shareholders equity and total average shareholders equity are also reconciled to total tangible common equity and total tangible average common equity on page 20. These measures are consistent with industry practice.

Capital Resources

Shareholders’ equity increased $37.1 million, or 6.0 percent, to $608.4 million at December 31, 2014 compared to $571.3 million at December 31, 2013. The increase in shareholders’ equity is primarily due to the addition of $35.9 million in retained earnings, comprised of net income of $57.9 million reduced by common stock dividends of $20.2 million. Included in other comprehensive income (loss) was a decrease of $1.1 million due to the adjustment in the funded status of the employee benefit plans offset by the change in unrealized gains on securities available-for-sale, both due to the decline in interest rates at the end of the year.

We continue to maintain a strong capital position with a leverage ratio of 9.80 percent as compared to the regulatory guideline of 5.00 percent to be well capitalized. Our risk-based Tier 1 and Total capital ratios were 12.34 percent and 14.27 percent at December 31, 2014, which places us significantly above the federal bank regulatory agencies’ “well capitalized” guidelines of 6.00 percent and 10.00 percent for Tier 1 and Total capital. We believe that we have the ability to raise additional capital, if necessary.

In July of 2013, the U.S. federal banking agencies issued a joint final rule that implements the Basel III capital standards

effective January 1, 2015 with a phase-in period ending January 1, 2019. The final rule establishes the minimum capital levels required under the Dodd-Frank Act, permanently grandfathers trust preferred securities issued before May 19, 2010 and

increases the capital required for certain categories of assets. We have evaluated the impact of the Basel III final capital rule and

anticipate that our regulatory capital ratios will continue to exceed the well-capitalized minimum requirements.

In October 2012, we filed a shelf registration statement on Form S-3 under the Securities Act of 1933, as amended, with the SEC for the issuance of up to $300.0 million of a variety of securities including, debt and capital securities, preferred and common stock and warrants. We may use the proceeds from the issuance of any securities for general corporate purposes, which could include investments at the holding company level, investing in, or extending credit to, our subsidiaries, possible acquisitions and stock repurchases. As of December 31, 2014, we had not issued any securities pursuant to the shelf registration statement.

52

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Contractual Obligations

Contractual obligations represent future cash commitments and liabilities under agreements with third parties and exclude contingent contractual liabilities for which we cannot reasonably predict future payments. We have various financial obligations, including contractual obligations and commitments that may require future cash payments. The following table presents as of December 31, 2014, significant fixed and determinable contractual obligations to third parties by payment date:

	Payments Due In
(dollars in thousands)	2015		2016-2017		2018-2019		Later Years		Total
Deposits without a stated maturity(1)	$	2,822,725	$	—	$	—	$	—	$	2,822,725
Certificates of deposit(1)	628,889		373,779		75,434		8,015		1,086,117
Securities sold under repurchase agreements(1)	30,605		—		—		—		30,605
Short-term borrowings(1)	290,000		—		—		—		290,000
Long-term borrowings(1)	2,399		4,742		5,010		7,291		19,442
Junior subordinated debt securities(1)	—		—		—		45,619		45,619
Operating and capital leases	2,350		4,530		4,452		41,039		52,371
Purchase obligations	11,326		21,772		23,188		—		56,286
Total	$	3,788,294	$	404,823	$	108,084	$	101,964	$	4,403,165

(1) Excludes interest

Operating lease obligations represent short and long-term lease arrangements as described in Part II, Item 8, Note 9 Premises and Equipment, in the Notes to Consolidated Financial Statements. Purchase obligations primarily represent obligations under agreement with our third party data processing servicer and communications charges as described in Part II, Item 8, Note 16 Commitments and Contingencies, of this Report.

Off-Balance Sheet Arrangements

In the normal course of business, we offer off-balance sheet credit arrangements to enable our customers to meet their financing objectives. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. Our exposure to credit loss, in the event the customer does not satisfy the terms of the agreement, equals the contractual amount of the obligation less the value of any collateral. We apply the same credit policies in making commitments and standby letters of credit that are used for the underwriting of loans to customers. Commitments generally have fixed expiration dates, annual renewals or other termination clauses and may require payment of a fee. Because many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.

The following table sets forth the commitments and letters of credit as of December 31:

(dollars in thousands)	2014		2013
Commitments to extend credit	$	1,158,628	$	1,038,529
Standby letters of credit	73,584		78,639
Total	$	1,232,212	$	1,117,168

Estimates of the fair value of these off-balance sheet items were not made because of the short-term nature of these arrangements and the credit standing of the counterparties.

Our allowance for unfunded commitments is determined using a methodology similar to that used to determine the ALL. Amounts are added to the allowance for unfunded commitments through a charge to current earnings in noninterest expense. The balance in the allowance for unfunded commitments decreased $0.6 million to $2.3 million at December 31, 2014 compared to $2.9 million at December 31, 2013. The decrease is due to the continued improvement in asset quality.

53

Item 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS -- continued

Liquidity

Liquidity is defined as a financial institution’s ability to meet its cash and collateral obligations at a reasonable cost. This includes the ability to satisfy the financial needs of depositors who want to withdraw funds or of borrowers needing to access funds to meet their credit needs. In order to manage liquidity risk our Board of Directors has delegated authority to the ALCO for formulation, implementation and oversight of liquidity risk management for S&T and S&T Bank. ALCO’s goal is to maintain adequate levels of liquidity at a reasonable cost to meet funding needs in both a normal operating environment and for potential liquidity stress events. ALCO monitors and manages liquidity through various ratios, reviewing cash flow projections, performing stress tests and by having a detailed contingency funding plan. ALCO policy guidelines are in place that define graduated risk tolerances. If our liquidity position moves to a level that has been defined as high risk, specific actions are required, such as increased monitoring or the development of an action plan to reduce the risk position.

Our primary funding and liquidity source is a stable customer deposit base. We believe S&T Bank has the ability to retain existing and attract new deposits, mitigating any funding dependency on other more volatile sources. Refer to the Deposits Section of this Part II, Item 7, MD&A, for additional discussion on deposits. Although deposits are the primary source of funds, we have identified various funding sources that can be used as part of our normal funding program when either a structure or cost efficiency has been identified. These funding sources include borrowing availability at the FHLB, Federal Funds lines with other financial institutions and access to the brokered deposit market.

An important component of S&T’s ability to effectively respond to potential liquidity stress events is maintaining a cushion of highly liquid assets. Highly liquid assets are those that can be converted to cash quickly, with little or no loss in value, to meet financial obligations. ALCO policy guidelines define a ratio of highly liquid assets to total assets by graduated risk tolerance levels of minimal, moderate and high. At December 31, 2014 S&T Bank had $393.6 million in highly liquid assets, which consisted of $56.4 million in interest-bearing deposits with banks, $334.2 million in unpledged securities and $3.0 million in loans held for sale. The highly liquid assets to total assets resulted in an asset liquidity ratio of 8.0 percent at December 31, 2014. Also, at December 31, 2014, we had a remaining borrowing availability of $1.3 billion with the FHLB of Pittsburgh. In addition, we have access to $60 million in Federal Funds lines with other financial institutions. Refer to Part II, Item 8, Notes 14 and 15 Short-term and Long-term borrowings, and the Borrowings section of this Part II, Item 7, MD&A, for more details on FHLB borrowings. S&T Bank is considered to be a well capitalized bank according to regulatory guidance, therefore access to brokered CDs is not restricted.

Inflation

Management is aware of the significant effect inflation has on interest rates and can have on financial performance. Our ability to cope with this is best determined by analyzing our capability to respond to changing interest rates and our ability to manage noninterest income and expense. We monitor the mix of interest-rate sensitive assets and liabilities through ALCO in order to reduce the impact of inflation on net interest income. We also control the effects of inflation by reviewing the prices of our products and services, by introducing new products and services and by controlling overhead expenses.

54

Item 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market risk is defined as the degree to which changes in interest rates, foreign exchange rates, commodity prices or equity prices can adversely affect a financial institution’s earnings or capital. For most financial institutions, including S&T, market risk primarily reflects exposures to changes in interest rates. Interest rate fluctuations affect earnings by changing net interest income and other interest-sensitive income and expense levels. Interest rate changes affect capital by changing the net present value of a bank’s future cash flows, and the cash flows themselves, as rates change. Accepting this risk is a normal part of banking and can be an important source of profitability and shareholder value. However, excessive interest rate risk can threaten a bank’s earnings, capital, liquidity and solvency. Our sensitivity to changes in interest rate movements is continually monitored by ALCO. ALCO monitors and manages market risk through rate shock analyses, economic value of equity, or EVE, analysis and by performing stress tests in order to mitigate earnings and market value fluctuations due to changes in interest rates.

Rate shock analyses results are compared to a base case to provide an estimate of the impact that market rate changes may have on 12 months of pretax net interest income. The base case and rate shock analyses are performed on a static balance sheet. A static balance sheet is a no growth balance sheet in which all maturing and/or repricing cash flows are reinvested in the same product at the existing product spread. Rate shock analyses assume an immediate parallel shift in market interest rates and also include management assumptions regarding the impact of interest rate changes on non-maturity deposit products (noninterest-bearing demand, interest-bearing demand, money market and savings) and changes in the prepayment behavior of fixed rate loans and securities with optionality. S&T policy guidelines limit the change in pretax net interest income over a 12 month horizon using rate shocks of +/- 300 basis points. Policy guidelines define the percent change in pretax net interest income by graduated risk tolerance levels of minimal, moderate and high. We have temporarily suspended the -200 and -300 basis point rate shock analyses. Due to the low interest rate environment we believe the impact to net interest income when evaluating the -200 and -300 basis point rate shock scenarios does not provide meaningful insight into our interest rate risk position.

In order to monitor interest rate risk beyond the 12 month time horizon of rate shocks, we also perform EVE analysis. EVE represents the present value of all asset cash flows minus the present value of all liability cash flows. EVE rate change results are compared to a base case to determine the impact that market rate changes may have on our EVE. As with rate shock analysis, EVE incorporates management assumptions regarding prepayment behavior of fixed rate loans and securities with optionality and the behavior and value of non-maturity deposit products. S&T policy guidelines limit the change in EVE given changes in rates of +/- 300 basis points. Policy guidelines define the percent change in EVE by graduated risk tolerance levels of minimal, moderate and high. We have also temporarily suspended the EVE -200 and -300 basis point scenarios due to the low interest rate environment.

The table below reflects the rate shock analyses and EVE results. Both are in the minimal risk tolerance level.

	December 31, 2014				December 31, 2013
Change in Interest Rate (basis points)	% Change in Pretax Net Interest Income		% Change in Economic Value of Equity		% Change in Pretax Net Interest Income		% Change in Economic Value of Equity
300	6.7		1.8		7.6		(6.1	)
200	4.1		3.9		5.3		(2.1	)
100	1.8		3.5		2.3		—
(100)	(3.4	)	(12.3	)	(3.4	)	(10.8	)

The results from the rate shock analyses are consistent with having an asset sensitive balance sheet. Having an asset sensitive balance sheet means more assets than liabilities will reprice during the measured time frames. The implications of an asset sensitive balance sheet will differ depending upon the change in market interest rates. For example, with an asset sensitive balance sheet in a declining interest rate environment, more assets than liabilities will decrease in rate. This situation could result in a decrease in net interest income and operating income. Conversely, with an asset sensitive balance sheet in a rising interest rate environment, more assets than liabilities will increase in rate. This situation could result in an increase in net interest income and operating income. As measured by rate shock analyses, an increase in interest rates would have a positive impact on pretax net interest income. However, there was a slight decline in the percent change in pretax net interest income for our rates up shock scenarios when comparing December 31, 2014 and December 31, 2013. The decline is a result of utilizing short term funding to support the asset growth during 2014.

When comparing the EVE results for December 31, 2014 and December 31, 2013, the percent change to EVE has improved in the rates up shock scenarios and decreased in the rate down shock scenario. The changes in EVE are due to lower long-term rates at December 31, 2014 compared to December 31, 2013. The lower long-term rates resulted in lower values of

55

Item 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK - continued

our non-maturity deposits in the 2014 base case due to the narrowing gap between the market funding rate and our non-maturity deposit rates. With a lower base case, the rates up shock scenarios reflect a greater improvement in the value of our non-maturity deposits. The improvement in the value of our non-maturity deposit values when comparing the rates up shock scenarios in 2014 to 2013 resulted in an improved EVE. The lower base case also impacted the rate down scenario but due to the overall low interest rate environment the impact was not as material.

In addition to rate shocks and EVE, we perform a market risk stress test annually. The market risk stress test includes sensitivity analyses and simulations. Sensitivity analyses are performed to help us identify which model assumptions cause the greatest impact on pretax net interest income. Sensitivity analyses may include changing prepayment behavior of fixed rate loans and securities with optionality and the impact of interest rate changes on non-maturity deposit products. Simulation analyses may include the potential impact of rate shocks other than the policy guidelines of +/- 300 basis points, yield curve shape changes, significant balance mix changes and various growth scenarios. Simulations indicate that an increase in rates, particularly if the yield curve steepens, will most likely result in an improvement in pretax net interest income. We realize that some of the benefit reflected in our scenarios may be offset by a change in the competitive environment and a change in product preference by our customers.

Item 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Consolidated Financial Statements

Consolidated Balance Sheets	57
Consolidated Statements of Net Income	58
Consolidated Statements of Comprehensive Income	59
Consolidated Statements of Changes in Shareholders’ Equity	60
Consolidated Statements of Cash Flows	61
Notes to Consolidated Financial Statements	63
Report of KPMG LLP, Independent Registered Public Accounting Firm, on Effectiveness of Internal Control Over Financial Reporting	114
Report of KPMG LLP, Independent Registered Public Accounting Firm, on Consolidated Financial Statements	115

56

CONSOLIDATED BALANCE SHEETS

S&T Bancorp, Inc. and Subsidiaries

	December 31,
(dollars in thousands, except share and per share data)	2014			2013
ASSETS
Cash and due from banks, including interest-bearing deposits of $57,048 and $53,594 at December 31, 2014 and 2013	$	109,580		$	108,356
Securities available-for-sale, at fair value	640,273			509,425
Loans held for sale	2,970			2,136
Portfolio loans, net of unearned income	3,868,746			3,566,199
Allowance for loan losses	(47,911		)	(46,255		)
Portfolio loans, net	3,820,835			3,519,944
Bank owned life insurance	62,252			60,480
Premises and equipment, net	38,166			36,615
Federal Home Loan Bank and other restricted stock, at cost	15,135			13,629
Goodwill	175,820			175,820
Other intangible assets, net	2,631			3,759
Other assets	97,024			103,026
Total Assets	$	4,964,686		$	4,533,190
LIABILITIES
Deposits:
Noninterest-bearing demand	$	1,083,919		$	992,779
Interest-bearing demand	335,099			312,790
Money market	376,612			281,403
Savings	1,027,095			994,805
Certificates of deposit	1,086,117			1,090,531
Total Deposits	3,908,842			3,672,308
Securities sold under repurchase agreements	30,605			33,847
Short-term borrowings	290,000			140,000
Long-term borrowings	19,442			21,810
Junior subordinated debt securities	45,619			45,619
Other liabilities	61,789			48,300
Total Liabilities	4,356,297			3,961,884
SHAREHOLDERS’ EQUITY
Common stock ($2.50 par value) Authorized—50,000,000 shares Issued—31,197,365 shares at December 31, 2014 and 2013 Outstanding—29,796,397 shares at December 31, 2014 and 29,737,725 shares at December 31, 2013	77,993			77,993
Additional paid-in capital	78,818			78,140
Retained earnings	504,060			468,158
Accumulated other comprehensive income (loss)	(13,833		)	(12,694		)
Treasury stock (1,400,968 shares at December 31, 2014 and 1,459,640 shares at December 31, 2013, at cost)	(38,649		)	(40,291		)
Total Shareholders’ Equity	608,389			571,306
Total Liabilities and Shareholders’ Equity	$	4,964,686		$	4,533,190

See Notes to Consolidated Financial Statements

57

CONSOLIDATED STATEMENTS OF NET INCOME

S&T Bancorp, Inc. and Subsidiaries

	Years ended December 31,
(dollars in thousands, except per share data)	2014		2013		2012
INTEREST INCOME
Loans, including fees	$	147,293	$	142,492	$	145,181
Investment Securities:
Taxable	8,983		7,478		7,544
Tax-exempt	3,857		3,401		3,121
Dividends	390		385		405
Total Interest Income	160,523		153,756		156,251
INTEREST EXPENSE
Deposits	10,128		11,406		16,796
Borrowings and junior subordinated debt securities	2,353		3,157		4,228
Total Interest Expense	12,481		14,563		21,024
NET INTEREST INCOME	148,042		139,193		135,227
Provision for loan losses	1,715		8,311		22,815
Net Interest Income After Provision for Loan Losses	146,327		130,882		112,412
NONINTEREST INCOME
Securities gains, net	41		5		3,016
Wealth management fees	11,343		10,696		9,808
Debit and credit card fees	10,781		10,931		11,134
Service charges on deposit accounts	10,559		10,488		9,992
Insurance fees	5,955		6,248		6,131
Gain on sale of merchant card servicing business	—		3,093		—
Mortgage banking	917		2,123		2,878
Other	6,742		7,943		8,953
Total Noninterest Income	46,338		51,527		51,912
NONINTEREST EXPENSE
Salaries and employee benefits	60,442		60,847		57,920
Data processing	8,737		8,263		7,326
Net occupancy	8,211		8,018		7,603
Furniture and equipment	5,317		4,883		5,262
Professional services and legal	3,717		4,184		4,610
Marketing	3,316		2,929		3,206
Other taxes	2,905		3,743		3,200
FDIC insurance	2,436		2,772		2,926
Merger related expenses	689		838		5,968
Other	21,470		20,915		24,842
Total Noninterest Expense	117,240		117,392		122,863
Income Before Taxes	75,425		65,017		41,461
Provision for income taxes	17,515		14,478		7,261
Net Income Available to Common Shareholders	$	57,910	$	50,539	$	34,200
Earnings per common share—basic	$	1.95	$	1.70	$	1.18
Earnings per common share—diluted	$	1.95	$	1.70	$	1.18
Dividends declared per common share	$	0.68	$	0.61	$	0.60

See Notes to Consolidated Financial Statements

58

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

S&T Bancorp, Inc. and Subsidiaries

	Years ended December 31,
(dollars in thousands)	2014			2013			2012
Net Income	$	57,910		$	50,539		$	34,200
Other Comprehensive Income (Loss), Before Tax:
Net change in unrealized gains (losses) on securities available-for-sale	11,825			(16,928		)	4,097
Net available-for-sale securities gains reclassified into earnings	(41		)	(5		)	(3,016		)
Adjustment to funded status of employee benefit plans	(13,394		)	18,299			(271		)
Other Comprehensive Income (Loss), Before Tax	(1,610		)	1,366			810
Income tax benefit (expense) related to items of other comprehensive income	471			(478		)	(284		)
Other Comprehensive Income (Loss), After Tax	(1,139		)	888			526
Comprehensive Income	$	56,771		$	51,427		$	34,726

See Notes to Consolidated Financial Statements

59

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY

S&T Bancorp, Inc. and Subsidiaries

(in thousands, except share and per share data)	Common Stock		Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Treasury Stock			Total
Balance at December 31, 2011	$	74,285	$	52,637		$	421,468		$	(14,108	)	$	(43,756	)	$	490,526
Net income for 2012						34,200									34,200
Other comprehensive income (loss), net of tax									526						526
Cash dividends declared ($0.60 per share)						(17,357		)							(17,357		)
Common stock issued in acquisition (1,483,327 shares)	3,708		23,902												27,610
Treasury stock issued (117,633 shares, net)						(2,272		)				3,270			998
Recognition of restricted stock compensation expense			949												949
Tax expense from stock-based compensation			(30		)										(30		)
Balance at December 31, 2012	$	77,993	$	77,458		$	436,039		$	(13,582	)	$	(40,486	)	$	537,422
Net income for 2013						50,539									50,539
Other comprehensive income (loss), net of tax									888						888
Cash dividends declared ($0.61 per share)						(18,137		)							(18,137		)
Treasury stock issued (5,516 shares, net)						(283		)				195			(88		)
Recognition of restricted stock compensation expense			586												586
Tax benefit from stock-based compensation			96												96
Balance at December 31, 2013	$	77,993	$	78,140		$	468,158		$	(12,694	)	$	(40,291	)	$	571,306
Net income for 2014						57,910									57,910
Other comprehensive income (loss), net of tax									(1,139		)				(1,139		)
Cash dividends declared ($0.68 per share)						(20,203		)							(20,203		)
Treasury stock issued (58,672 shares, net)						(1,805		)				1,642			(163		)
Recognition of restricted stock compensation expense			933												933
Tax benefit from stock-based compensation			16												16
Issuance costs			(271		)										(271		)
Balance at December 31, 2014	$	77,993	$	78,818		$	504,060		$	(13,833	)	$	(38,649	)	$	608,389

See Notes to Consolidated Financial Statements

60

CONSOLIDATED STATEMENTS OF CASH FLOWS

S&T Bancorp, Inc. and Subsidiaries

	Years ended December 31,
(dollars in thousands)	2014			2013			2012
OPERATING ACTIVITIES
Net Income	$	57,910		$	50,539		$	34,200
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,715			8,311			22,815
Provision for unfunded loan commitments	(655		)	(60		)	1,811
Depreciation and amortization	4,703			5,333			7,000
Net amortization of discounts and premiums	3,680			3,826			2,280
Stock-based compensation expense	975			687			913
Securities (gains) losses, net	(41		)	(5		)	(3,016		)
Net gain on sale of merchant card servicing business	—			(3,093		)	—
Tax (benefit) expense from stock-based compensation	(16		)	(96		)	30
Mortgage loans originated for sale	(42,842		)	(66,695		)	(104,924		)
Proceeds from the sale of loans	42,361			87,932			86,886
Deferred income taxes	1,536			(2,358		)	1,038
Gain on sale of fixed assets	(33		)	—			—
Gain on the sale of loans, net	(353		)	(874		)	(1,612		)
Net (increase) decrease in interest receivable	(933		)	(130		)	973
Net decrease in interest payable	(127		)	(2,005		)	(1,376		)
Net decrease in other assets	7,628			25,681			18,815
Net increase (decrease) in other liabilities	2,595			(20,917		)	18,057
Net Cash Provided by Operating Activities	78,103			86,076			83,890
INVESTING ACTIVITIES
Proceeds from maturities, prepayments and calls of securities available-for-sale	57,092			66,744			87,604
Proceeds from sales of securities available-for-sale	1,418			94			66,575
Purchases of securities available-for-sale	(181,213		)	(144,752		)	(166,786		)
Net proceeds from the redemption of Federal Home Loan Bank stock	(1,506		)	1,685			5,700
Net (increase) decrease in loans	(313,264		)	(241,172		)	(21,892		)
Proceeds from the sale of loans not originated for resale	5,408			5,158			3,874
Purchases of premises and equipment	(5,079		)	(2,833		)	(2,179		)
Proceeds from the sale of premises and equipment	96			643			142
Net cash acquired from bank acquisitions	—			—			18,639
Proceeds from the sale of merchant card servicing business	—			4,750			—
Net Cash Used in Investing Activities	(437,048		)	(309,683		)	(8,323		)
FINANCING ACTIVITIES
Net increase (decrease) in core deposits	240,948			(22,767		)	207,653
Net (decrease) increase in certificates of deposit	(4,549		)	56,174			(217,311		)
Net increase (decrease) in short-term borrowings	150,000			65,000			—
Net (decrease) increase in securities sold under repurchase agreements	(3,242		)	(28,735		)	28,442
Proceeds from long-term borrowings	—			—			4,311
Repayments of long-term borrowings	(2,367		)	(12,291		)	(15,088		)
Repayment of junior subordinated debt	—			(45,000		)	—
Purchase of treasury shares	(163		)	(88		)	(49		)
Sale of treasury shares	—			—			1,047
Issuance costs	(271		)	—			—
Cash dividends paid to common shareholders	(20,203		)	(18,137		)	(17,357		)
Tax benefit (expense) from stock-based compensation	16			96			(30		)
Net Cash Provided by (Used in) Financing Activities	360,169			(5,748		)	(8,382		)
Net increase (decrease) in cash and cash equivalents	1,224			(229,355		)	67,185
Cash and cash equivalents at beginning of year	108,356			337,711			270,526

61

	Years ended December 31,
(dollars in thousands)	2014		2013		2012
Cash and Cash Equivalents at End of Year	$	109,580	$	108,356	$	337,711
Supplemental Disclosures
Transfers to other real estate owned and other repossessed assets	$	586	$	1,238	$	1,915
Interest paid	12,609		16,568		22,329
Income taxes paid, net of refunds	18,075		13,130		4,063
Loans transferred to held for sale	—		5,158		19,255
Net assets (liabilities) from acquisitions, excluding cash and cash equivalents	—		—		(683		)

See Notes to Consolidated Financial Statements

62

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

S&T Bancorp, Inc. and Subsidiaries

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

S&T Bancorp, Inc., or S&T, was incorporated on March 17, 1983 under the laws of the Commonwealth of Pennsylvania as a bank holding company and has three wholly owned subsidiaries, S&T Bank, 9th Street Holdings, Inc. and STBA Capital Trust I. We own a one-half interest in Commonwealth Trust Credit Life Insurance Company, or CTCLIC.

We are presently engaged in nonbanking activities through the following five entities: 9th Street Holdings, Inc.; S&T Bancholdings, Inc.; CTCLIC; S&T Insurance Group, LLC and Stewart Capital Advisors, LLC. 9th Street Holdings, Inc. and S&T Bancholdings, Inc. are investment holding companies. CTCLIC, which is a joint venture with another financial institution, acts as a reinsurer of credit life, accident and health insurance policies sold by S&T Bank and the other institution. S&T Insurance Group, LLC, through its subsidiaries, offers a variety of insurance products. Stewart Capital Advisors, LLC is a registered investment advisor that manages private investment accounts for individuals and institutions and advises the Stewart Capital Mid Cap Fund.

On March 9, 2012 we completed the acquisition and conversion of Mainline Bancorp, Inc., or Mainline, a bank holding company based in Ebensburg, Pennsylvania. Mainline had one subsidiary, Mainline National Bank, with eight branches and $129.5 million in loans and $206.0 million in deposits. The acquisition expanded our market share and footprint throughout Cambria and Blair counties of western Pennsylvania. The total acquisition cost of Mainline was $27.8 million.

On August 13, 2012, we completed the acquisition of Gateway Bank of Pennsylvania, a bank with $99.1 million in loans and $105.4 million in deposits, headquartered in McMurray, Pennsylvania. The total acquisition cost of Gateway Bank was $19.8 million. As of December 31, 2012, Gateway was operating as a separate wholly-owned subsidiary of S&T, with all transactions since the acquisition date consolidated in our financial statements. On February 8, 2013, Gateway Bank was merged into S&T Bank, and their two branches are now fully operational branches of S&T Bank.

On October 29, 2014, S&T and Integrity Bancshares, Inc., or Integrity, based in Camp Hill, Pennsylvania with eight branches and approximately $860 million in assets as of September 2014, entered into a definitive Agreement and Plan of Merger of Integrity with and into S&T. The transaction, valued at approximately $155 million, is expected to close in the first quarter of 2015, after satisfaction of customary closing conditions. As soon as practicable following the merger, Integrity Bank, a Pennsylvania state-chartered bank subsidiary of Integrity, will be merged with and into S&T Bank with S&T Bank continuing as the surviving bank. The bank merger is expected to close in the second quarter of 2015. However, for a period of at least three years following the merger, S&T Bank intends to operate bank branches in the markets currently served by Integrity Bank using the name "Integrity Bank - A Division of S&T Bank".

Accounting Policies

Our financial statements have been prepared in accordance with U. S. generally accepted accounting principles, or GAAP. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the dates of the balance sheets and revenues and expenses for the periods then ended. Actual results could differ from those estimates. Our significant accounting policies are described below.

Principles of Consolidation

The Consolidated Financial Statements include the accounts of S&T and its wholly owned subsidiaries. All significant intercompany transactions have been eliminated in consolidation. Investments of 20 percent to 50 percent of the outstanding common stock of investees are accounted for using the equity method of accounting.

Reclassification

Certain amounts in prior years’ financial statements and footnotes have been reclassified to conform to the current year’s presentation. The reclassifications had no significant effect on our results of operations or financial condition.

Business Combinations

We account for business combinations using the acquisition method of accounting. Under this method of accounting, the acquired company’s net assets are recorded at fair value at the date of acquisition, and the results of operations of the acquired company are combined with our results from that date forward. Acquisition costs are expensed when incurred. The difference between the purchase price and the fair value of the net assets acquired (including identified intangibles) is recorded as goodwill.

63

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Fair Value Measurements

We use fair value measurements when recording and disclosing certain financial assets and liabilities. Securities available-for-sale, trading assets and derivatives are recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record other assets at fair value on a nonrecurring basis, such as loans held for sale, impaired loans, other real estate owned, or OREO, mortgage servicing rights, or MSRs, and certain other assets.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants at the measurement date. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities; it is not a forced transaction. In determining fair value, we use various valuation approaches, including market, income and cost approaches. The fair value standard establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing an asset or liability, which is developed, based on market data we have obtained from independent sources. Unobservable inputs reflect our estimates of assumptions that market participants would use in pricing an asset or liability, which are developed based on the best information available in the circumstances.

The fair value hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The fair value hierarchy is broken down into three levels based on the reliability of inputs as follows:

Level 1: valuation is based upon unadjusted quoted market prices for identical instruments traded in active markets.

Level 2: valuation is based upon quoted market prices for similar instruments traded in active markets, quoted market prices for identical or similar instruments traded in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by market data.

Level 3: valuation is derived from other valuation methodologies, including discounted cash flow models and similar techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in determining fair value.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Our policy is to recognize transfers between any of the fair value hierarchy levels at the end of the reporting period in which the transfer occurred.

The following are descriptions of the valuation methodologies that we use for financial instruments recorded at fair value on either a recurring or nonrecurring basis.

Recurring Basis

Securities Available-for-Sale

Securities available-for-sale include both debt and equity securities. We obtain fair values for debt securities from a third-party pricing service which utilizes several sources for valuing fixed-income securities. We validate prices received from our pricing service through comparison to a secondary pricing service and broker quotes. We review the methodologies of the pricing service which provides us with a sufficient understanding of the valuation models, assumptions, inputs and pricing to reasonably measure the fair value of our securities. The market evaluation sources for debt securities include observable inputs rather than significant unobservable inputs and are classified as Level 2. The service provider utilizes pricing models that vary by asset class and include available trade, bid and other market information. Generally, the methodologies include broker quotes, proprietary models, and vast descriptive terms and conditions databases, as well as extensive quality control programs.

Marketable equity securities that have an active, quotable market are classified as Level 1. Marketable equity securities that are quotable, but are thinly traded or inactive, are classified as Level 2 and securities that are not readily traded and do not have a quotable market are classified as Level 3.

Trading Assets

We use quoted market prices to determine the fair value of our trading assets. Our trading assets are held in a Rabbi Trust under a deferred compensation plan and are invested in readily quoted mutual funds. Accordingly, these assets are classified as Level 1.

64

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Derivative Financial Instruments

We use derivative instruments, including interest rate swaps for commercial loans with our customers, interest rate lock commitments and the sale of mortgage loans in the secondary market. We calculate the fair value for derivatives using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. Each valuation considers the contractual terms of the derivative, including the period to maturity, and uses observable market based inputs, such as interest rate curves and implied volatilities. Accordingly, derivatives are classified as Level 2. We incorporate credit valuation adjustments into the valuation models to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in calculating fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements and collateral postings.

Nonrecurring Basis

Loans Held for Sale

Loans held for sale consist of 1-4 family residential loans originated for sale in the secondary market and, from time to time, certain loans transferred from the loan portfolio to loans held for sale, all of which are carried at the lower of cost or fair value. The fair value of 1-4 family residential loans is based on the principal or most advantageous market currently offered for similar loans using observable market data. The fair value of the loans transferred from the loan portfolio is based on the amounts offered for these loans in currently pending sales transactions. Loans held for sale carried at fair value are classified as Level 3.

Impaired Loans

Impaired loans are carried at the lower of carrying value or fair value. Fair value is determined as the recorded investment balance less any specific reserve. We establish a specific reserve based on the following three impairment methods: 1) the present value of expected future cash flows discounted at the loan’s original effective interest rate, 2) the loan’s observable market price or 3) the fair value of the collateral less estimated selling costs when the loan is collateral dependent and we expect to liquidate the collateral. However, if repayment is expected to come from the operation of the collateral, rather than liquidation, then we do not consider estimated selling costs in determining the fair value of the collateral. Collateral values are generally based upon appraisals by approved, independent state certified appraisers. Appraised values may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or our knowledge of the borrower and the borrower’s business. Impaired loans carried at fair value are classified as Level 3.

OREO and Other Repossessed Assets

OREO and other repossessed assets obtained in partial or total satisfaction of a loan are recorded at the lower of recorded investment in the loan or fair value less cost to sell. Subsequent to foreclosure, these assets are carried at the lower of the amount recorded at acquisition date or fair value less cost to sell. Accordingly, it may be necessary to record nonrecurring fair value adjustments. Fair value, when recorded, is generally based upon appraisals by approved, independent state certified appraisers. Like impaired loans, appraisals on OREO may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or other information available to us. OREO and other repossessed assets carried at fair value are classified as Level 3.

Mortgage Servicing Rights

The fair value of MSRs is determined by calculating the present value of estimated future net servicing cash flows, considering expected mortgage loan prepayment rates, discount rates, servicing costs and other economic factors, which are determined based on current market conditions. The expected rate of mortgage loan prepayments is the most significant factor driving the value of MSRs. MSRs are considered impaired if the carrying value exceeds fair value. The valuation model includes significant unobservable inputs; therefore, MSRs are classified as Level 3.

Other Assets

We measure certain other assets at fair value on a nonrecurring basis. Fair value is based on the application of lower of cost or fair value accounting, or write-downs of individual assets. Valuation methodologies used to measure fair value are consistent with overall principles of fair value accounting and consistent with those described above.

65

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Financial Instruments

In addition to financial instruments recorded at fair value in our financial statements, fair value accounting guidance requires disclosure of the fair value of all of an entity’s assets and liabilities that are considered financial instruments. The majority of our assets and liabilities are considered financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and willing seller engaged in an exchange transaction. Also, it is our general practice and intent to hold our financial instruments to maturity and to not engage in trading or sales activities with respect to such financial instruments. For fair value disclosure purposes, we substantially utilize the fair value measurement criteria as required and explained above. In cases where quoted fair values are not available, we use present value methods to determine the fair value of our financial instruments.

Cash and Cash Equivalents

The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks, including interest-bearing deposits, approximate fair value.

Loans

The fair value of variable rate performing loans that may reprice frequently at short-term market rates is based on carrying values adjusted for credit risk. The fair value of variable rate performing loans that reprice at intervals of one year or longer, such as adjustable rate mortgage products, is estimated using discounted cash flow analyses that utilize interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of fixed rate performing loans is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of nonperforming loans is based on their carrying values less any specific reserve. The carrying amount of accrued interest approximates fair value.

Bank Owned Life Insurance

Fair value approximates net cash surrender value of bank owned life insurance, or BOLI.

Deposits

The fair values disclosed for deposits without defined maturities (e.g., noninterest and interest-bearing demand, money market and savings accounts) are by definition equal to the amounts payable on demand. The carrying amounts for variable rate, fixed-term time deposits approximate their fair values. Estimated fair values for fixed rate and other time deposits are based on discounted cash flow analysis using interest rates currently offered for time deposits with similar terms. The carrying amount of accrued interest approximates fair value.

Short-Term Borrowings

The carrying amounts of securities sold under repurchase agreements and other short-term borrowings approximate their fair values.

Long-Term Borrowings

The fair values disclosed for fixed rate long-term borrowings are determined by discounting their contractual cash flows using current interest rates for long-term borrowings of similar remaining maturities. The carrying amounts of variable rate long-term borrowings approximate their fair values.

Junior Subordinated Debt Securities

The variable rate junior subordinated debt securities reprice quarterly; therefore, the fair values approximate the carrying values.

Loan Commitments and Standby Letters of Credit

Off-balance sheet financial instruments consist of commitments to extend credit and letters of credit. Except for interest rate lock commitments, estimates of the fair value of these off-balance sheet items are not made because of the short-term nature of these arrangements and the credit standing of the counterparties.

Other

Estimates of fair value are not made for items that are not defined as financial instruments, including such items as our core deposit intangibles and the value of our trust operations.

Cash and Cash Equivalents

We consider cash and due from banks, interest-bearing deposits with banks and federal funds sold as cash and cash equivalents.

66

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Securities

We determine the appropriate classification of securities at the time of purchase. All securities, including both debt and equity securities, are classified as available-for-sale. These are securities that we intend to hold for an indefinite period of time, but that may be sold in response to changes in interest rates, prepayment risk, liquidity needs or other factors. Such securities are carried at fair value with net unrealized gains and losses deemed to be temporary, reported as a component of other comprehensive income (loss), net of tax. Realized gains and losses on the sale of available-for-sale securities and other-than-temporary impairment, or OTTI, charges are recorded within noninterest income in the Consolidated Statements of Net Income. Realized gains and losses on the sale of securities are determined using the specific-identification method. Bond premiums are amortized to the call date and bond discounts are accreted to the maturity date, both on a level yield basis.

An investment security is considered impaired if its fair value is less than its cost or amortized cost basis. We perform a quarterly review of our securities to identify those that may indicate an OTTI. Our policy for OTTI within the marketable equity securities portfolio generally requires an impairment charge when the security is in a loss position for 12 consecutive months, unless facts and circumstances would suggest the need for an OTTI prior to that time. Our policy for OTTI within the debt securities portfolio is based upon a number of factors, including but not limited to, the length of time and extent to which the estimated fair value has been less than cost, the financial condition of the underlying issuer, the ability of the issuer to meet contractual obligations, the best estimate of the impairment charge representing credit losses, the likelihood of the security’s ability to recover any decline in its estimated fair value and whether management intends to sell the security or if it is more likely than not that management will be required to sell the investment security prior to the security’s recovery. If the impairment is considered other-than-temporary based on management’s review, the impairment must be separated into credit and non-credit components. The credit component is recognized in the Consolidated Statements of Net Income and the non-credit component is recognized in other comprehensive income (loss), net of applicable taxes.

Loans Held for Sale

Loans held for sale consist of 1-4 family residential loans originated for sale in the secondary market and from time to time, certain loans transferred from the loan portfolio to loans held for sale, all of which are carried at the lower of cost or fair value. If a loan is transferred from the loan portfolio to the held-for-sale category, any write-down in the carrying amount of the loan at the date of transfer is recorded as a charge-off against the allowance for loan losses, or ALL. Subsequent declines in fair value are recognized as a charge to noninterest income. When a loan is placed in the held-for-sale category, we stop amortizing the related deferred fees and costs. The remaining unamortized fees and costs are recognized as part of the cost basis of the loan at the time it is sold. Gains and losses on sales of loans held for sale are included in other noninterest income in the Consolidated Statements of Net Income.

Loans

Loans are reported at the principal amount outstanding net of unearned income, unamortized premiums or discounts and deferred origination fees and costs. We defer certain nonrefundable loan origination and commitment fees. Accretion of discounts and amortization of premiums on loans are included in interest income in the Consolidated Statements of Net Income. Loan origination fees and direct loan origination costs are deferred and amortized as an adjustment of loan yield over the respective lives of the loans without consideration of anticipated prepayments. If a loan is paid off, the remaining unaccreted or unamortized net origination fees and costs are immediately recognized into income or expense. Interest is accrued and interest income is recognized on loans as earned.

Closed-end installment loans, amortizing loans secured by real estate and any other loans with payments scheduled monthly are reported past due when the borrower is in arrears two or more monthly payments. Other multi-payment obligations with payments scheduled other than monthly are reported past due when one scheduled payment is due and unpaid for 30 days or more.

Generally, consumer loans are charged off against the ALL upon the loan reaching 90 days past due. Commercial loans are charged off as management becomes aware of facts and circumstances that raise doubt as to the collectability of all or a portion of the principal and when we believe a confirmed loss exists.

Nonaccrual or Nonperforming Loans

We stop accruing interest on a loan (nonaccrual loan) when the borrower’s payment is 90 days past due. Loans are also placed on nonaccrual status when payment is not past due, but we have doubt about the borrower’s ability to comply with contractual repayment terms. When the interest accrual is discontinued, all unpaid accrued interest is reversed against interest income. Interest income is recognized on nonaccrual loans on a cash basis if recovery of the remaining principal is reasonably assured. As a general rule, a nonaccrual loan may be restored to accrual status when its principal and interest is paid current and the bank expects repayment of the remaining contractual principal and interest, or when the loan otherwise becomes well secured and in the process of collection.

67

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Troubled Debt Restructurings

Troubled debt restructurings, or TDRs, are loans where we, for economic or legal reasons related to a borrower’s financial difficulty, grant a concession to the borrower that we would not otherwise grant. We strive to identify borrowers in financial difficulty early and work with them to modify the terms before their loan reaches nonaccrual status. These modified terms generally include extensions of maturity dates at a stated interest rate lower than the current market rate for a new loan with similar risk characteristics, reductions in contractual interest rates or principal deferment. While unusual, there may be instances of principal forgiveness. These modifications are generally for longer term periods that would not be considered insignificant. Additionally, we classify loans where the debt obligation has been discharged through a Chapter 7 Bankruptcy and not reaffirmed as TDRs.

We individually evaluate all substandard commercial loans that experienced a forbearance or change in terms agreement, as well as all substandard consumer and residential mortgage loans that entered into an agreement to modify their existing loan to determine if they should be designated as TDRs.

All TDRs will be reported as impaired loans for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. Further, all impaired loans are reported as nonaccrual loans unless the loan is a TDR that has met the requirements to be returned to accruing status. TDRs can be returned to accruing status if the ultimate collectability of all contractual amounts due, according to the restructured agreement, is not in doubt and there is a period of a minimum of six months of satisfactory payment performance by the borrower either immediately before or after the restructuring.

Allowance for Loan Losses

The ALL reflects our estimates of probable losses inherent in the loan portfolio at the balance sheet date. The methodology for determining the ALL has two main components: evaluation and impairment tests of individual loans and evaluation and impairment tests of certain groups of homogeneous loans with similar risk characteristics.

A loan is considered impaired when it is probable that we will be unable to collect all principal and interest payments due according to the original contractual terms of the loan agreement. We individually evaluate all substandard and nonaccrual commercial loans greater than $0.5 million for impairment. All TDRs will be reported as an impaired loan for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. For all TDRs, regardless of size, as well as all other impaired loans, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate. Specific reserves are established based upon the following three impairment methods: 1) the present value of expected future cash flows discounted at the loan’s original effective interest rate, 2) the loan’s observable market price or 3) the estimated fair value of the collateral if the loan is collateral dependent. Our impairment evaluations consist primarily of the fair value of collateral method because most loans are collateral dependent. Collateral values are discounted to consider disposition costs when appropriate. A specific reserve is established or a charge-off is taken if the fair value of the impaired loan is less than the recorded investment in the loan balance.

The ALL for homogeneous loans is calculated using a systematic methodology with both a quantitative and a qualitative analysis that is applied on a quarterly basis. The ALL model is comprised of five distinct portfolio segments: 1) Commercial Real Estate, or CRE, 2) Commercial and Industrial, or C&I, 3) Commercial Construction, 4) Consumer Real Estate and 5) Other Consumer. Each segment has a distinct set of risk characteristics monitored by management. We further assess and monitor risk and performance at a more disaggregated level which includes our internal risk rating system for the commercial segments and type of collateral, lien position and loan-to-value, or LTV, for the consumer segments.

We first apply historical loss rates to pools of loans with similar risk characteristics. Loss rates are calculated by historical charge-offs that have occurred within each pool of loans over the loss emergence period, or LEP. The LEP is an estimate of the average amount of time from the point at which a loss is incurred on a loan to the point at which the loss is confirmed. In general, the LEP will be shorter in an economic slowdown or recession and longer during times of economic stability or growth, as customers are better able to delay loss confirmation after a potential loss event has occurred.

In conjunction with our annual review of the ALL assumptions, we have updated our study of LEPs for our commercial portfolio segments using our loan charge-off history. Our study showed that the LEP for our commercial construction portfolio has lengthened and that our current estimated LEPs for the CRE and C&I portfolio segments did not materially change.We estimate the LEP to be 3.5 years for CRE and commercial construction and 2.5 years for C&I. This is an increase from the prior LEP of 1.5 years for commercial construction.We believe that the LEPs for the consumer portfolio segments have also lengthened as they are influenced by the same improvement in economic conditions that has impacted the commercial portfolio segments over the past two years. We therefore also lengthened the LEP assumption for the consumer portfolio to 2.0 years. This is an increase from prior LEPs of 1.5 years for the consumer portfolio segment.

68

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Another key assumption is the look-back period, or LBP, which represents the historical data period utilized to calculate loss rates. We lengthened the LBP for C&I, Commercial Construction and the consumer loan portfolio segments in order to capture relevant historical data believed to be reflective of losses inherent in the portfolios. We use a five and one quarter years LBP for our commercial portfolio segments and three and one quarter years LBP for our consumer portfolio segments.

After consideration of the historic loss calculations, management applies additional qualitative adjustments so that the ALL is reflective of the inherent losses that exist in the loan portfolio at the balance sheet date. Qualitative adjustments are made based upon changes in economic conditions, loan portfolio and asset quality data and credit process changes, such as credit policies or underwriting standards. The evaluation of the various components of the ALL requires considerable judgment in order to estimate inherent loss exposures.

The changes made to the ALL assumptions were applied prospectively and did not result in a material change to the total ALL. Lengthening the LEPs does increase the historical loss rates and therefore the quantitative component of the ALL. We believe this makes the quantitative component of the ALL more reflective of inherent losses that exist within the loan portfolio, which resulted in a decrease in the qualitative component of the ALL. The ALL at December 31, 2014 reflects these changes within the C&I, Commercial Construction and consumer portfolio segments.

Qualitative adjustments are aggregated into five categories, including process, economic conditions, loan portfolio, asset quality and other external factors.

Within the five aforementioned categories, the following qualitative factors are considered:

1) Changes in our lending policies and procedures, including underwriting standards, collection, charge-off and recovery practices not considered elsewhere in estimating credit losses;

2) Changes in national, regional, and local economic and business conditions and developments that affect the collectability of the portfolio, including the condition of various market segments;

3) Changes in the nature and volume of our loan portfolio and terms of loans;

4) Changes in the experience, ability and depth of our lending management and staff;

5) Changes in the volume and severity of past due loans, the volume of nonaccrual loans, and the volume and severity of adversely classified or graded loans;

6) Changes in the quality of our loan review system;

7) Changes in the value of the underlying collateral for collateral-dependent loans;

8) The existence and effect of any concentrations of credit and changes in the level of such concentrations; and

9) The effect of external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in our current loan portfolio.

Our ALL Committee meets quarterly to verify the overall adequacy of the ALL. Additionally, on an annual basis, the ALL Committee meets to validate our ALL model. This validation includes reviewing the pools of loans to ensure the segmentation results in relevant homogeneous pools of loans. The ALL Committee reviews the LEP and LBP used to calculate the loss rates. Further, the ALL Committee reviews the qualitative factors to ensure that both the categories, as noted above, and the range of qualitative adjustments remain appropriate. As a result of this ongoing monitoring process, we may make changes to our ALL assumptions to be responsive to the economic environment.

Bank Owned Life Insurance

We have purchased life insurance policies on certain executive officers and employees. We receive the cash surrender value of each policy upon its termination or benefits are payable upon the death of the insured. Changes in net cash surrender value are recognized in noninterest income or expense in the Consolidated Statements of Net Income.

Premises and Equipment

Premises and equipment, including leasehold improvements, are stated at cost less accumulated depreciation. Maintenance and repairs are charged to expense as incurred, while improvements that extend an asset’s useful life are capitalized and depreciated over the estimated remaining life of the asset. Depreciation expense is computed by the straight-line method for financial reporting purposes and accelerated methods for income tax purposes over the estimated useful lives of the particular assets. Management reviews long-lived assets using events and circumstances to determine if and when an asset is evaluated for recoverability.

69

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

The estimated useful lives for the various asset categories are as follows:

1) Land and Land Improvements	Non-depreciating assets
2)     Buildings	25 years
3)     Furniture and Fixtures	5 years
4)     Computer Equipment and Software	5 years or term of license
5)     Other Equipment	5 years
6)     Vehicles	5 years
7)     Leasehold Improvements	Lesser of estimated useful life of the asset (generally 15 years unless established otherwise) or the remaining term of the lease, including renewal options in the lease that are reasonably assured of exercise

Restricted Investment in Bank Stock

Federal Home Loan Bank, or FHLB, stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. We hold FHLB stock because we are a member of the FHLB of Pittsburgh. The FHLB requires members to purchase and hold a specified level of FHLB stock based upon on the members asset value, level of borrowings and participation in other programs offered. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the low-cost products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of the FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value. Both cash and stock dividends are reported as income in taxable investment securities in the Consolidated Statements of Net Income. FHLB stock is evaluated for OTTI on a quarterly basis.

Atlantic Community Bankers’ Bank, or ACBB, stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the carrying value. We do not currently use their membership products and services. We acquired ACBB stock through various mergers of banks that were ACBB members. ACBB stock is evaluated for OTTI on a quarterly basis.

Goodwill and Other Intangible Assets

We have three reporting units: Community Banking, Insurance and Wealth Management. At December 31, 2014, we had goodwill of $175.8 million, including $171.6 million in Community Banking, representing 98 percent of total goodwill and $4.2 million in Insurance, representing two percent of total goodwill. The carrying value of goodwill is tested annually for impairment each October 1 or more frequently if it is determined that we should do so. We first assess qualitatively whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. Our qualitative assessment considers such factors as macroeconomic conditions, market conditions specifically related to the banking industry, our overall financial performance and various other factors. If we determine that it is more likely than not that the fair value is less than the carrying amount, we proceed to test for impairment. The evaluation for impairment involves comparing the current estimated fair value of each reporting unit to its carrying value, including goodwill. If the current estimated fair value of a reporting unit exceeds its carrying value, no additional testing is required and impairment loss is not recorded. If the estimated fair value of a reporting unit is less than the carrying value, further valuation procedures are performed and could result in impairment of goodwill being recorded. Further valuation procedures would include allocating the estimated fair value to all assets and liabilities of the reporting unit to determine an implied goodwill value. If the implied value of goodwill of a reporting unit is less than the carrying amount of that goodwill, an impairment loss is recognized in an amount equal to that excess.

We have core deposit and other intangible assets resulting from acquisitions which are subject to amortization. We determine the amount of identifiable intangible assets based upon independent core deposit and insurance contract analyses at the time of the acquisition. Intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable.

70

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Variable Interest Entities

Variable interest entities, or VIEs, are legal entities that generally either do not have equity investors with voting rights or that have equity investors that do not provide sufficient financial resources for the entity to support its activities. When an enterprise has both the power to direct the economic activities of the VIE and the obligation to absorb losses of the VIE or the right to receive benefits of the VIE, the entity has a controlling financial interest in the VIE. A VIE often holds financial assets, including loans or receivables, or other property. The company with a controlling financial interest, the primary beneficiary, is required to consolidate the VIE into its consolidated balance sheets. S&T has one wholly-owned trust subsidiary, STBA Capital Trust I, or the Trust, for which it does not absorb a majority of expected losses or receive a majority of the expected residual returns. At its inception in 2008, the Trust issued floating rate trust preferred securities to the Trustee, another financial institution, and used the proceeds from the sale to invest in junior subordinated debt, which is the sole asset of the Trust. The Trust pays dividends on the trust preferred securities at the same rate as the interest we pay on our junior subordinated debt held by the Trust. Because the third-party investors are the primary beneficiaries, the Trust qualifies as a VIE. Accordingly, the Trust and its net assets are not included in our Consolidated Financial Statements. However, the junior subordinated debt issued by S&T is included in our Consolidated Balance Sheets.

Joint Ventures

We have made investments directly in Low Income Housing Tax Credit, or LIHTC, partnerships formed with third parties. As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties. These investments are amortized over a maximum of 10 years, which represents the period that the tax credits will be utilized. We have determined that we are not the primary beneficiary of these investments because the general partners have the power to direct the activities that most significantly impact the economic performance of the partnership and have both the obligation to absorb expected losses and the right to receive benefits.

OREO and Other Repossessed Assets

OREO and other repossessed assets are included in other assets in the Consolidated Balance Sheets and are comprised of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of a foreclosure. At the time of foreclosure, these properties are recorded at the lower of the recorded investment in the loan or fair value less cost to sell. Loan losses arising from the acquisition of such property initially are charged against the ALL. Subsequently, these assets are carried at the lower of carrying value or current fair value less cost to sell. Gains or losses realized upon disposition of the asset are recorded in other expenses in the Consolidated Statements of Net Income.

Mortgage Servicing Rights

MSRs are recognized as separate assets when commitments to fund a loan to be sold are made. Upon commitment, the MSR is established, which represents the then current estimated fair value of future net cash flows expected to be realized for performing the servicing activities. The estimated fair value of the MSRs is estimated by calculating the present value of estimated future net servicing cash flows, considering expected mortgage loan prepayment rates, discount rates, servicing costs and other economic factors, which are determined based on current market conditions. The expected rate of mortgage loan prepayments is the most significant factor driving the value of MSRs. Increases in mortgage loan prepayments reduce estimated future net servicing cash flows because the life of the underlying loan is reduced. In determining the estimated fair value of MSRs, mortgage interest rates, which are used to determine prepayment rates, are held constant over the estimated life of the portfolio. MSRs are reported in other assets in the Consolidated Balance Sheets and are amortized into noninterest income in the Consolidated Statements of Net Income in proportion to, and over the period of, the estimated future net servicing income of the underlying mortgage loans.

MSRs are regularly evaluated for impairment based on the estimated fair value of those rights. The MSRs are stratified by certain risk characteristics, primarily loan term and note rate. If temporary impairment exists within a risk stratification tranche, a valuation allowance is established through a charge to income equal to the amount by which the carrying value exceeds the estimated fair value. If it is later determined that all or a portion of the temporary impairment no longer exists for a particular tranche, the valuation allowance is reduced.

MSRs are also reviewed for OTTI. OTTI exists when the recoverability of a recorded valuation allowance is determined to be remote, taking into consideration historical and projected interest rates and loan pay-off activity. When this situation occurs, the unrecoverable portion of the valuation allowance is applied as a direct write-down to the carrying value of the MSR. Unlike a valuation allowance, a direct write-down permanently reduces the carrying value of the MSR and the valuation allowance, precluding subsequent recoveries.

71

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Derivative Financial Instruments

Interest Rate Swaps

In accordance with applicable accounting guidance for derivatives and hedging, all derivatives are recognized as either assets or liabilities on the balance sheet at fair value. Interest rate swaps are contracts in which a series of interest rate flows (fixed and variable) are exchanged over a prescribed period. The notional amounts on which the interest payments are based are not exchanged. These derivative positions relate to transactions in which we enter into an interest rate swap with a commercial customer while at the same time entering into an offsetting interest rate swap with another financial institution. In connection with each transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a same notional amount at a fixed rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert a variable rate loan to a fixed rate loan with us receiving a variable rate. These agreements could have floors or caps on the contracted interest rates.

Pursuant to our agreements with various financial institutions, we may receive collateral or may be required to post collateral based upon mark-to-market positions. Beyond unsecured threshold levels, collateral in the form of cash or securities may be made available to counterparties of interest rate swap transactions. Based upon our current positions and related future collateral requirements relating to them, we believe any effect on our cash flow or liquidity position to be immaterial.

Derivatives contain an element of credit risk, the possibility that we will incur a loss because a counterparty, which may be a financial institution or a customer, fails to meet its contractual obligations. All derivative contracts with financial institutions may be executed only with counterparties approved by our Asset and Liability Committee, or ALCO, and derivatives with customers may only be executed with customers within credit exposure limits approved by our Senior Loan Committee. Interest rate swaps are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives are recorded in current earnings and included in other noninterest income in the Consolidated Statements of Net Income.

Interest Rate Lock Commitments and Forward Sale Contracts

In the normal course of business, we sell originated mortgage loans into the secondary mortgage loan market. We also offer interest rate lock commitments to potential borrowers. The commitments are generally for a period of 60 days and guarantee a specified interest rate for a loan if underwriting standards are met, but the commitment does not obligate the potential borrower to close on the loan. Accordingly, some commitments expire prior to becoming loans. We can encounter pricing risks if interest rates increase significantly before the loan can be closed and sold. We may utilize forward sale contracts in order to mitigate this pricing risk. Whenever a customer desires these products, a mortgage originator quotes a secondary market rate guaranteed for that day by the investor. The rate lock is executed between the mortgagee and us and in turn a forward sale contract may be executed between us and the investor. Both the rate lock commitment and the corresponding forward sale contract for each customer are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives during the commitment period are recorded in current earnings and included in mortgage banking in the Consolidated Statements of Net Income.

Allowance for Unfunded Commitments

In the normal course of business, we offer off-balance sheet credit arrangements to enable our customers to meet their financing objectives. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. Our exposure to credit loss, in the event the customer does not satisfy the terms of the agreement, equals the contractual amount of the obligation less the value of any collateral. We apply the same credit policies in making commitments and standby letters of credit that are used for the underwriting of loans to customers. Commitments generally have fixed expiration dates, annual renewals or other termination clauses and may require payment of a fee. Because many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The allowance for unfunded commitments is included in other liabilities in the Consolidated Balance Sheets. The allowance for unfunded commitments is determined using a similar methodology as our ALL. The reserve is calculated by applying historical loss rates from our ALL model to the estimated future utilization of our unfunded commitments.

Treasury Stock

The repurchase of our common stock is recorded at cost. At the time of reissuance, the treasury stock account is reduced using the average cost method. Gains and losses on the reissuance of common stock are recorded in additional paid-in capital, to the extent additional paid-in capital from previous treasury share transactions exists. Any deficiency is charged to retained earnings.

72

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Revenue Recognition

We recognize revenues as they are earned based on contractual terms or as services are provided when collectability is reasonably assured. Our principal source of revenue is interest income, which is recognized on an accrual basis. Interest and dividend income, loan fees, trust fees, fees and charges on deposit accounts, insurance commissions and other ancillary income related to our deposits and lending activities are accrued as earned.

Wealth Management Fees

Assets held in a fiduciary capacity by the subsidiary bank, S&T Bank, are not our assets and are therefore not included in our Consolidated Financial Statements. Wealth management fee income is reported in the Consolidated Statements of Net Income on an accrual basis.

Stock-Based Compensation

Stock-based compensation may include stock options and restricted stock which is measured using the fair value method of accounting. The grant date fair value is recognized over the period during which the recipient is required to provide service in exchange for the award. Stock option expense is determined utilizing the Black-Scholes model. Restricted stock expense is determined using the grant date fair value. We estimate expected forfeitures when stock-based awards are granted and record compensation expense only for awards that are expected to vest.

Pensions

The expense for S&T Bank’s qualified and nonqualified defined benefit pension plans is actuarially determined using the projected unit credit actuarial cost method. It requires us to make economic assumptions regarding future interest rates and asset returns as well as various demographic assumptions. We estimate the discount rate used to measure benefit obligations by applying the projected cash flow for future benefit payments to a yield curve of high-quality corporate bonds available in the marketplace and by employing a model that matches bonds to our pension cash flows. The expected return on plan assets is an estimate of the long-term rate of return on plan assets, which is determined based on the current asset mix and estimates of return by asset class. We recognize in the Consolidated Balance Sheets an asset for the plan’s overfunded status or a liability for the plan’s underfunded status. Gains or losses related to changes in benefit obligations or plan assets resulting from experience different from that assumed are recognized as other comprehensive income (loss) in the period in which they occur. To the extent that such gains or losses exceed ten percent of the greater of the projected benefit obligation or plan assets, they are recognized as a component of pension costs over the future service periods of active plan participants. The funding policy for the qualified plan is to contribute an amount each year that is at least equal to the minimum required contribution as determined under the Pension Protection Act of 2006 and Moving Ahead for Progress in the 21st Century Act, but not more than the maximum amount permissible for taxable plan sponsors. Our nonqualified plans are unfunded.

Marketing Costs

We expense all marketing-related costs, including advertising costs, as incurred.

Income Taxes

We estimate income tax expense based on amounts expected to be owed to the tax jurisdictions where we conduct business. On a quarterly basis, management assesses the reasonableness of our effective tax rate based upon our current estimate of the amount and components of net income, tax credits and the applicable statutory tax rates expected for the full year. We classify interest and penalties as an element of tax expense.

Deferred income tax assets and liabilities are determined using the asset and liability method and are reported in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax basis of assets and liabilities and recognizes enacted changes in tax rate and laws. When deferred tax assets are recognized, they are subject to a valuation allowance based on management’s judgment as to whether realization is more likely than not.

Accrued taxes represent the net estimated amount due to taxing jurisdictions and are reported in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. We evaluate and assess the relative risks and appropriate tax treatment of transactions and filing positions after considering statutes, regulations, judicial precedent and other information and maintain tax accruals consistent with the evaluation of these relative risks and merits. Changes to the estimate of accrued taxes occur periodically due to changes in tax rates, interpretations of tax laws, the status of examinations being conducted by taxing authorities and changes to statutory, judicial and regulatory guidance. These changes, when they occur, can affect deferred taxes and accrued taxes, as well as the current period’s income tax expense and can be significant to our operating results.

Tax positions are recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that

73

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

is greater than 50 percent likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded.

Earnings Per Share

Basic earnings per share, or EPS, is calculated using the two-class method to determine income allocated to common shareholders. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities under the two-class method. Income allocated to common shareholders is then divided by the weighted average number of common shares outstanding during the period. Potentially dilutive securities are excluded from the basic EPS calculation.

Diluted EPS is calculated under the more dilutive of either the treasury stock method or the two-class method. Under the treasury stock method, the weighted average number of common shares outstanding is increased by the potentially dilutive common shares. For the two-class method, diluted EPS is calculated for each class of shareholders using the weighted average number of shares attributed to each class. Potentially dilutive common shares are common stock equivalents relating to our outstanding warrants, stock options and restricted stock.

Recently Adopted Accounting Standards Updates, or ASU

Business Combinations (Topic 805): Pushdown Accounting

In November 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-17, Pushdown Accounting - Business Combinations (Topic 805). The ASU provides an acquired entity with an option to elect to apply pushdown accounting. The amendments of this ASU apply to the separate financial statements of an acquired entity and its subsidiaries that are a business activity upon the occurrence of an event in which an acquirer obtains control of the entity. Pushdown accounting refers to the use of the acquirer's basis in the preparation of the acquiree's separate financial statements. The new standard became effective upon issuance on November 18, 2014. The adoption of this ASU had no impact on our results of operations or financial position.

Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss or a Tax Credit Carryforward Exists

In July 2013, the FASB issued ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss or a Tax Credit Carryforward Exists. The ASU requires that entities should present an unrecognized tax benefit as a reduction of the deferred tax asset for a net operating loss, or NOL, or similar tax loss or tax credit carry forward rather than as a liability when the uncertain tax position would reduce the NOL or other carry forward under the tax law. The new standard is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013, and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. The adoption of this ASU had no impact on our results of operations or financial position.

Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date

In February 2013, the FASB issued ASU No. 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date. The ASU requires the measurement of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement with its co-obligors as well as any additional amount that the entity expects to pay on behalf of its co-obligors. The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2013, and early adoption is permitted. The adoption of this ASU had no impact on our results of operations or financial position.

Recently Issued Accounting Standards Updates not yet Adopted

Share-Based Payment Awards with Performance Targets

In June 2014, the FASB issued ASU No. 2014-12, Share-Based Payment Awards with Performance Targets. The main provisions of ASU 2014-12 require that a performance target included in a share-based payment award that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. Therefore, under the existing stock compensation guidance in Accounting Standards Codification Topic 718, the performance target should not be reflected in estimating the grant-date fair value of the award. The standard is effective for annual periods and interim periods beginning after December 15, 2015. We do not expect that this ASU will have a material impact on our results of operations or financial position.

74

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Repurchase-To-Maturity Transactions, Repurchase Financings and New Disclosures

In June 2014, the FASB issued ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings and New Disclosures to change the accounting for repurchase-to-maturity transactions and certain linked repurchase financings. This will result in accounting for both types of arrangements as secured borrowings on the balance sheet and require new disclosures to (i) increase transparency about the types of collateral pledged in secured borrowing transactions and (ii) enable users to better understand transactions in which the transferor retains substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction. The disclosure for repurchase agreements, securities lending transactions and repurchase-to-maturity transactions accounted for as secured borrowings is required to be presented for annual periods beginning after December 15, 2014, and for interim periods beginning after March 15, 2015. All other accounting and disclosure amendments in the ASU are effective for the first interim or annual period beginning after December 15, 2014. Earlier application for a public business entity is prohibited. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Revenues from Contracts with Customers

In May 2014, the FASB issued ASU No. 2014-09, Revenues from Contracts with Customers. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. The standard is required to be adopted by public business entities in annual periods beginning on or after December 15, 2016 including interim periods therein. The provisions do not apply to lease contracts, insurance contracts, financial instruments and other contractual rights or obligations (e.g. receivables, debt and equity securities, liabilities, debt, derivatives transfers, and servicing, etc.), guarantees, or non-monetary exchanges between entities. We are currently evaluating the impact of the adoption of this pronouncement on our consolidated financial statements; however, we do not expect that this ASU will have a material impact on our results of operations or financial position.

Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity

In April 2014, the FASB issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies related disclosure requirements. The guidance applies to all entities that dispose of components. It will significantly change current practices for assessing discontinued operations and affect an entity’s income and earnings per share from continuing operations. An entity is required to reclassify assets and liabilities of a discontinued operation that are classified as held for sale or disposed of in the current period for all comparative periods presented. The ASU requires that an entity present in the statement of cash flows or disclose in a note either total operating and investing cash flows for discontinued operations, or depreciation, amortization, capital expenditures and significant operating and investing noncash items related to discontinued operations. Additional disclosures are required when an entity retains significant continuing involvement with a discontinued operation after its disposal, including the amount of cash flows to and from a discontinued operation. The new standard applies prospectively effective for annual periods beginning on or after December 15, 2014 and interim periods therein, and early adoption is permitted. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure

In January 2014, the FASB issued ASU No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. The ASU clarifies that an in substance repossession or foreclosure has occurred and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure. Interim and annual disclosure is required of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The new standard is effective using either the modified retrospective transition method or a prospective transition method for fiscal years and interim periods within those years, beginning after December 15, 2014, and early adoption is permitted. We do not expect that this ASU will have a material impact on our results of operations or financial position.

75

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- continued

Accounting for Investments in Qualified Affordable Housing Projects

In January 2014, the FASB issued ASU No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. The ASU permits reporting entities to make an accounting policy election to account for investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. The proportional amortization method permits the amortization of the initial cost of the investment in proportion to the tax credits and other tax benefits received, and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2014, and early adoption is permitted. We do not expect that this ASU will have a material impact on our results of operations or financial position.

NOTE 2. EARNINGS PER SHARE

The following table reconciles the numerators and denominators of basic and diluted EPS:

	Years ended December 31,
(dollars in thousands, except share and per share data)	2014		2013		2012
Numerator for Earnings per Common Share—Basic:
Net income	$	57,910	$	50,539	$	34,200
Less: Income allocated to participating shares	165		147		126
Net Income Allocated to Common Shareholders	$	57,745	$	50,392	$	34,074
Numerator for Earnings per Common Share—Diluted:
Net income	$	57,910	$	50,539	$	34,200
Denominators:
Weighted Average Common Shares Outstanding—Basic	29,683,103		29,647,231		28,976,619
Add: Dilutive potential common shares	25,621		35,322		32,261
Denominator for Treasury Stock Method—Diluted	29,708,724		29,682,553		29,008,880
Weighted Average Common Shares Outstanding—Basic	29,683,103		29,647,231		28,976,619
Add: Average participating shares outstanding	84,918		86,490		107,274
Denominator for Two-Class Method—Diluted	29,768,021		29,733,721		29,083,893
Earnings per common share—basic	$	1.95	$	1.70	$	1.18
Earnings per common share—diluted	$	1.95	$	1.70	$	1.18
Warrants considered anti-dilutive excluded from dilutive potential common shares - exercise price $31.53 per share, expires January 2019	517,012		517,012		517,012
Stock options considered anti-dilutive excluded from dilutive potential common shares	419,538		619,418		747,443
Restricted stock considered anti-dilutive excluded from dilutive potential common shares	59,297		51,169		75,012

76

NOTE 3. FAIR VALUE MEASUREMENTS

The following tables present our assets and liabilities that are measured at fair value on a recurring basis by fair value hierarchy level at December 31, 2014 and 2013. There were no transfers between Level 1 and Level 2 for items measured at fair value on a recurring basis during the periods presented.

	December 31, 2014
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Securities available-for-sale:
U.S. Treasury securities	$	—	$	14,880	$	—	$	14,880
Obligations of U.S. government corporations and agencies	—		269,285		—		269,285
Collateralized mortgage obligations of U.S. government corporations and agencies	—		118,006		—		118,006
Residential mortgage-backed securities of U.S. government corporations and agencies	—		46,668		—		46,668
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		39,673		—		39,673
Obligations of states and political subdivisions	—		142,702		—		142,702
Marketable equity securities	178		8,881		—		9,059
Total securities available-for-sale	178		640,095		—		640,273
Trading securities held in a Rabbi Trust	3,456		—		—		3,456
Total securities	3,634		640,095		—		643,729
Derivative financial assets:
Interest rate swaps	—		12,981		—		12,981
Interest rate lock commitments	—		235		—		235
Total Assets	$	3,634	$	653,311	$	—	$	656,945
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	$	—	$	12,953	$	—	$	12,953
Forward sale contracts	—		57		—		57
Total Liabilities	$	—	$	13,010	$	—	$	13,010

77

NOTE 3. FAIR VALUE MEASUREMENTS -- continued

	December 31, 2013
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Securities available-for-sale:
Obligations of U.S. government corporations and agencies	$	—	$	234,751	$	—	$	234,751
Collateralized mortgage obligations of U.S. government corporations and agencies	—		63,774		—		63,774
Residential mortgage-backed securities of U.S. government corporations and agencies	—		48,669		—		48,669
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		39,052		—		39,052
Obligations of states and political subdivisions	—		114,264		—		114,264
Marketable equity securities	202		8,713		—		8,915
Total securities available-for-sale	202		509,223		—		509,425
Trading securities held in a Rabbi Trust	2,864		—		—		2,864
Total securities	3,066		509,223		—		512,289
Derivative financial assets:
Interest rate swaps	—		13,698		—		13,698
Interest rate lock commitments	—		85		—		85
Forward sales contracts	—		34		—		34
Total Assets	$	3,066	$	523,040	$	—	$	526,106
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	—		13,647		—		13,647
Total Liabilities	$	—	$	13,647	$	—	$	13,647

We classify financial instruments as Level 3 when valuation models are used because significant inputs are not observable in the market. The following table presents the changes in assets measured at fair value on a recurring basis for which we have utilized Level 3 inputs to determine the fair value:

	Years ended December 31,
(dollars in thousands)	2014		2013
Balance at beginning of year	$	—	$	300
Total gains included in other comprehensive income (loss)(1)	—		44
Net purchases, sales, issuances and settlements	—		—
Transfers out of Level 3	—		(344		)
Balance at End of Year	$	—	$	—

(1) Changes in estimated fair value of available-for-sale investments are recorded in accumulated other comprehensive income (loss) while gains and losses from sales are recorded in security gains (losses), net in the Consolidated Statements of Net Income.

In the second quarter of 2013, $0.3 million was transferred out of Level 3 into Level 2 as a result of a security becoming listed on a national securities exchange. There were no Level 3 liabilities measured at fair value on a recurring basis for any of the periods presented.

We may be required to measure certain assets and liabilities on a nonrecurring basis. Nonrecurring assets are recorded at the lower of cost or fair value in our financial statements. There were no liabilities measured at fair value on a nonrecurring basis at December 31, 2014 and 2013. The following table presents our assets that are measured at fair value on a nonrecurring basis by the fair value hierarchy level as of the dates presented:

78

NOTE 3. FAIR VALUE MEASUREMENTS -- continued

	December 31, 2014								December 31, 2013
(dollars in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
ASSETS(1)
Loans held for sale	$	—	$	—	$	—	$	—	$	—	$	—	$	1,516	$	1,516
Impaired loans	—		—		12,916		12,916		—		—		19,197		19,197
Other real estate owned	—		—		117		117		—		—		317		317
Mortgage servicing rights	—		—		2,934		2,934		—		—		1,025		1,025
Total Assets	$	—	$	—	$	15,967	$	15,967	$	—	$	—	$	22,055	$	22,055

(1) This table presents only the nonrecurring items that are recorded at fair value in our financial statements.

The carrying values and fair values of our financial instruments at December 31, 2014 and 2013 are presented in the following tables:

			Fair Value Measurements at December 31, 2014
(dollars in thousands)	Carrying Value(1)		Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	109,580	$	109,580	$	109,580	$	—	$	—
Securities available-for-sale	640,273		640,273		178		640,095		—
Loans held for sale	2,970		2,991		—		—		2,991
Portfolio loans, net of unearned income	3,868,746		3,827,634		—		—		3,827,634
Bank owned life insurance	62,252		62,252		—		62,252		—
FHLB and other restricted stock	15,135		15,135		—		—		15,135
Trading securities held in a Rabbi Trust	3,456		3,456		3,456		—		—
Mortgage servicing rights	2,817		2,934		—		—		2,934
Interest rate swaps	12,981		12,981		—		12,981		—
Interest rate lock commitments	235		235		—		235		—
LIABILITIES
Deposits	$	3,908,842	$	3,910,342	$	—	$	—	$	3,910,342
Securities sold under repurchase agreements	30,605		30,605		—		—		30,605
Short-term borrowings	290,000		290,000		—		—		290,000
Long-term borrowings	19,442		20,462		—		—		20,462
Junior subordinated debt securities	45,619		45,619		—		—		45,619
Interest rate swaps	12,953		12,953		—		12,953		—
Forward sale contracts	57		57				57

(1) As reported in the Consolidated Balance Sheets

79

NOTE 3. FAIR VALUE MEASUREMENTS -- continued

			Fair Value Measurements at December 31, 2013
(dollars in thousands)	Carrying Value(1)		Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	108,356	$	108,356	$	108,356	$	—	$	—
Securities available-for-sale	509,425		509,425		202		509,223		—
Loans held for sale	2,136		2,139		—		—		2,139
Portfolio loans, net of unearned income	3,566,199		3,538,072		—		—		3,538,072
Bank owned life insurance	60,480		60,480		—		60,480		—
FHLB and other restricted stock	13,629		13,629		—		—		13,629
Trading securities held in a Rabbi Trust	2,864		2,864		2,864		—		—
Mortgage servicing rights	2,919		3,143		—		—		3,143
Interest rate swaps	13,698		13,698		—		13,698		—
Interest rate lock commitments	85		85		—		85		—
Forward sale contracts	34		34		—		34		—
LIABILITIES
Deposits	$	3,672,308	$	3,673,624	$	—	$	—	$	3,673,624
Securities sold under repurchase agreements	33,847		33,847		—		—		33,847
Short-term borrowings	140,000		140,000		—		—		140,000
Long-term borrowings	21,810		22,924		—		—		22,924
Junior subordinated debt securities	45,619		45,619		—		—		45,619
Interest rate swaps	13,647		13,647		—		13,647		—

(1) As reported in the Consolidated Balance Sheets

NOTE 4. RESTRICTIONS ON CASH AND DUE FROM BANK ACCOUNTS

The Board of Governors of the Federal Reserve System, or the Federal Reserve, imposes certain reserve requirements on all depository institutions. These reserves are maintained in the form of vault cash or as an interest-bearing balance with the Federal Reserve. The required reserves averaged $41.8 million for the year ended 2014, $39.7 million for the year ended 2013 and $36.6 million for the year ended 2012.

NOTE 5. DIVIDEND AND LOAN RESTRICTIONS

S&T is a legal entity separate and distinct from its banking and other subsidiaries. A substantial portion of our revenues consist of dividend payments we receive from S&T Bank. S&T Bank, in turn, is subject to state laws and regulations that limit the amount of dividends it can pay to us. In addition, both S&T and S&T Bank are subject to various general regulatory policies relating to the payment of dividends, including requirements to maintain adequate capital above regulatory minimums. The Federal Reserve has indicated that banking organizations should generally pay dividends only if (i) the organization’s net income available to common shareholders over the past year has been sufficient to fully fund the dividends and (ii) the prospective rate of earnings retention appears consistent with the organization’s capital needs, asset quality and overall financial condition. Thus, under certain circumstances based upon our financial condition, our ability to declare and pay quarterly dividends may require consultation with the Federal Reserve and may be prohibited by applicable Federal Reserve guidelines.

Federal law prohibits us from borrowing from S&T Bank unless such loans are collateralized by specific obligations. Further, such loans are limited to 10 percent of S&T Bank’s capital stock and surplus. In April 2012, we closed a $5.0 million line of credit with S&T Bank that had been secured by investments of another subsidiary of S&T.

80

NOTE 6. SECURITIES AVAILABLE-FOR-SALE

The following tables present the amortized cost and fair value of available-for-sale securities as of the dates presented:

	December 31, 2014									December 31, 2013
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Treasury securities	$	14,873	$	7	$	—		$	14,880	$	—	$	—	$	—		$	—
Obligations of U.S. government corporations and agencies	268,029		2,334		(1,078		)	269,285		235,181		2,151		(2,581		)	234,751
Collateralized mortgage obligations of U.S. government corporations and agencies	116,897		1,257		(148		)	118,006		63,776		601		(603		)	63,774
Residential mortgage-backed securities of U.S. government corporations and agencies	45,274		1,548		(154		)	46,668		47,934		1,420		(685		)	48,669
Commercial mortgage-backed securities of U.S. government corporations and agencies	39,834		232		(393		)	39,673		40,357		—		(1,305		)	39,052
Obligations of states and political subdivisions	136,977		5,789		(64		)	142,702		115,572		1,294		(2,602		)	114,264
Debt Securities	621,884		11,167		(1,837		)	631,214		502,820		5,466		(7,776		)	500,510
Marketable equity securities	7,579		1,480		—			9,059		7,579		1,336		—			8,915
Total	$	629,463	$	12,647	$	(1,837	)	$	640,273	$	510,399	$	6,802	$	(7,776	)	$	509,425

The following table shows the composition of gross and net realized gains and losses for the periods presented:

	Years ended December 31,
(dollars in thousands)	2014		2013		2012
Gross realized gains	$	41	$	5	$	3,027
Gross realized losses	—		—		(11		)
Net Realized Gains	$	41	$	5	$	3,016

81

NOTE 6. SECURITIES AVAILABLE-FOR-SALE -- continued

The following tables present the fair value and the age of gross unrealized losses by investment category as of the dates presented:

	December 31, 2014
	Less Than 12 Months						12 Months or More							Total
(dollars in thousands)	Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses
Obligations of U.S. government corporations and agencies	4	$	39,745	$	(207	)	8	$	63,149	$	(871	)	12	$	102,894	$	(1,078	)
Collateralized mortgage obligations of U.S. government corporations and agencies	1	9,323		(148		)	—	—		—			1	9,323		(148		)
Residential mortgage-backed securities of U.S. government corporations and agencies	—	—		—			1	8,982		(154		)	1	8,982		(154		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	1	9,998		(25		)	2	20,640		(368		)	3	30,638		(393		)
Obligations of states and political subdivisions	1	263		(1		)	2	10,756		(63		)	3	11,019		(64		)
Total Temporarily Impaired Securities	7	$	59,329	$	(381	)	13	$	103,527	$	(1,456	)	20	$	162,856	$	(1,837	)

82

NOTE 6. SECURITIES AVAILABLE-FOR-SALE -- continued

	December 31, 2013
	Less Than 12 Months						12 Months or More							Total
(dollars in thousands)	Number of Securities	Fair  Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses
Obligations of U.S. government corporations and agencies	16	$	126,017	$	(2,581	)	—	$	—	$	—		16	$	126,017	$	(2,581	)
Collateralized mortgage obligations of U.S. government corporations and agencies	3	39,522		(603		)	—	—		—			3	39,522		(603		)
Residential mortgage-backed securities of U.S. government corporations and agencies	2	22,822		(685		)	—	—		—			2	22,822		(685		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	4	39,052		(1,305		)	—	—		—			4	39,052		(1,305		)
Obligations of states and political subdivisions	16	47,529		(1,739		)	2	10,088		(863		)	18	57,617		(2,602		)
Total Temporarily Impaired Securities	41	$	274,942	$	(6,913	)	2	$	10,088	$	(863	)	43	$	285,030	$	(7,776	)

We do not believe any individual unrealized loss as of December 31, 2014 represents an OTTI. As of December 31, 2014, the unrealized losses on 20 debt securities were primarily attributable to changes in interest rates and not related to the credit quality of these securities. All debt securities are determined to be investment grade and are paying principal and interest according to the contractual terms of the security. There were no unrealized losses on marketable equity securities. We do not intend to sell and it is more likely than not that we will not be required to sell any of the securities in an unrealized loss position before recovery of their amortized cost.

The following table displays net unrealized gains and losses, net of tax on securities available for sale included in accumulated other comprehensive income/(loss) for the periods presented:

	December 31, 2014							December 31, 2013
(dollars in thousands)	Gross Unrealized Gains		Gross Unrealized Losses			Net Unrealized Gains/(Losses)		Gross Unrealized Gains		Gross Unrealized Losses			Net Unrealized Gains/(Losses)
Total unrealized gains/(losses) on securities available for sale	$	12,647	$	(1,837	)	$	10,810	$	6,802	$	(7,776	)	$	(974	)
Income tax expense/(benefit)	4,426		(643		)	3,783		2,381		(2,722		)	(341		)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	$	8,221	$	(1,194	)	$	7,027	$	4,421	$	(5,054	)	$	(633	)

The amortized cost and fair value of securities available-for-sale at December 31, 2014 by contractual maturity are included in the table below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

83

NOTE 6. SECURITIES AVAILABLE-FOR-SALE -- continued

	December 31, 2014
(dollars in thousands)	Amortized Cost		Fair Value
Due in one year or less	$	21,137	$	21,339
Due after one year through five years	196,589		197,183
Due after five years through ten years	101,013		102,788
Due after ten years	101,140		105,557
	419,879		426,867
Collateralized mortgage obligations of U.S. government corporations and agencies	116,897		118,006
Residential mortgage-backed securities of U.S. government corporations and agencies	45,274		46,668
Commercial mortgage-backed securities of U.S. government corporations and agencies	39,834		39,673
Debt Securities	621,884		631,214
Marketable equity securities	7,579		9,059
Total	$	629,463	$	640,273

At December 31, 2014 and 2013, securities with carrying values of $289.1 million and $243.2 million were pledged for various regulatory and legal requirements.

NOTE 7. LOANS AND LOANS HELD FOR SALE

Loans are presented net of unearned income of $2.1 million and $1.3 million at December 31, 2014 and 2013. The following table indicates the composition of the loans as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Commercial
Commercial real estate	$	1,682,236	$	1,607,756
Commercial and industrial	994,138		842,449
Commercial construction	216,148		143,675
Total Commercial Loans	2,892,522		2,593,880
Consumer
Residential mortgage	489,586		487,092
Home equity	418,563		414,195
Installment and other consumer	65,567		67,883
Consumer construction	2,508		3,149
Total Consumer Loans	976,224		972,319
Total Portfolio Loans	3,868,746		3,566,199
Loans held for sale	2,970		2,136
Total Loans	$	3,871,716	$	3,568,335

We attempt to limit our exposure to credit risk by diversifying our loan portfolio by segment, collateral and industry and actively managing concentrations. When concentrations exist in certain segments, we mitigate this risk by monitoring the relevant economic indicators and internal risk rating trends and through stress testing of the loans in these segments. Total commercial loans represented 75 percent of total portfolio loans at December 31, 2014 and 73 percent of total portfolio loans at December 31, 2013. Within our commercial portfolio, CRE and Commercial Construction portfolios combined comprise 66 percent of total commercial loans and 49 percent of total portfolio loans at December 31, 2014 and 68 percent of total commercial loans and 49 percent of total portfolio loans at December 31, 2013. Further segmentation of the CRE and Commercial Construction portfolios by industry and collateral type reveal no concentration in excess of nine percent of total loans at either December 31, 2014 or December 31, 2013.

Our market area includes Pennsylvania and the contiguous states of Ohio, West Virginia, New York and Maryland. The majority of our commercial and consumer loans are made to businesses and individuals in this market area resulting in a

84

NOTE 7. LOANS AND LOANS HELD FOR SALE -- continued

geographic concentration. We believe our knowledge and familiarity with customers and conditions locally outweighs this geographic concentration risk. The conditions of the local and regional economies are monitored closely through publicly available data as well as information supplied by our customers. Management believes underwriting guidelines, active monitoring of economic conditions and ongoing review by credit administration mitigates the concentration risk present in the loan portfolio. Our CRE and Commercial Construction portfolios have out of market exposure of 8 percent of the combined portfolio and 3.9 percent of total loans at December 31, 2014 and 7.9 percent of the combined portfolio and 3.9 percent of total loans at December 31, 2013.

TDRs are loans where we, for economic or legal reasons related to a borrower's financial difficulties, grant a concession to the borrower that we would not otherwise grant. We strive to identify borrowers in financial difficulty early and work with them to modify the terms before their loan reaches nonaccrual status. These modified terms generally include extensions of maturity dates at a stated interest rate lower than the current market rate for a new loan with similar risk characteristics, reductions in contractual interest rates or principal deferment. While unusual, there may be instances of principal forgiveness. These modifications are generally for longer term periods that would not be considered insignificant. Additionally, we classify loans where the debt obligation has been discharged through a Chapter 7 Bankruptcy and not reaffirmed as TDRs.

We individually evaluate all substandard commercial loans that have experienced a forbearance or change in terms agreement, as well as all substandard consumer and residential mortgage loans that entered into an agreement to modify their existing loan to determine if they should be designated as TDRs. All TDRs are considered to be impaired loans and will be reported as impaired loans for the remaining life of the loan, unless the restructuring agreement specifies and interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. Further, all impaired loans are reported as nonaccrual loans unless the loan is a TDR that has met the requirements to be returned to accruing status. TDRs can be returned to accruing status if the ultimate collectability of all contractual amounts due, according to the restructured agreement, is not in doubt and there is a period of a minimum of six months of satisfactory payment performance by the borrower either immediately before or after the restructuring.

The following table summarizes the restructured loans as of the dates presented:

	December 31, 2014						December 31, 2013
(dollars in thousands)	Performing TDRs		Nonperforming TDRs		Total TDRs		Performing TDRs		Nonperforming TDRs		Total TDRs
Commercial real estate	$	16,939	$	2,180	$	19,119	$	19,711	$	3,898	$	23,609
Commercial and industrial	8,074		356		8,430		7,521		1,884		9,405
Commercial construction	5,736		1,869		7,605		5,338		2,708		8,046
Residential mortgage	2,839		459		3,298		2,581		1,356		3,937
Home equity	3,342		562		3,904		3,924		218		4,142
Installment and other consumer	53		10		63		154		3		157
Total	$	36,983	$	5,436	$	42,419	$	39,229	$	10,067	$	49,296

85

NOTE 7. LOANS AND LOANS HELD FOR SALE -- continued

The following tables present the restructured loans for the 12 months ended December 31:

	2014
(dollars in thousands)	Number of Loans	Pre-Modification Outstanding Recorded Investment(1)		Post-Modification Outstanding Recorded Investment(1)		Total Difference in Recorded Investment
Commercial real estate
Principal deferral	4	$	1,991	$	1,965	$	26
Commercial and industrial
Principal deferral	2	$	381	$	356	$	25
Commercial construction
Maturity date extension	1	1,019		974		45
Residential mortgage
Chapter 7 bankruptcy(2)	9	651		634		17
Home equity
Maturity date extension	6	349		348		1
Interest rate reduction and maturity date extension	2	96		95		1
Chapter 7 bankruptcy(2)	15	432		382		50
Installment and other consumer
Chapter 7 bankruptcy(2)	5	30		23		7
Total by Concession Type
Principal deferral	6	2,372		2,321		51
Interest rate reduction and maturity date extension	2	96		95		1
Maturity date extension	7	1,368		1,322		46
Chapter 7 bankruptcy(2)	29	1,113		1,039		74
Total	44	$	4,949	$	4,777	$	172

(1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end.

(2) Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.

86

NOTE 7. LOANS AND LOANS HELD FOR SALE -- continued

	2013
(dollars in thousands)	Number of Loans	Pre-Modification Outstanding Recorded Investment(1)		Post-Modification Outstanding Recorded Investment(1)		Total Difference in Recorded Investment
Commercial real estate
Principal deferral	4	$	2,772	$	2,494	$	(278	)
Interest rate reduction and maturity date extension	2	664		636		(28		)
Principal forgiveness (2)	1	4,339		4,216		(123		)
Maturity date extension	1	219		219		—
Chapter 7 bankruptcy(3)	6	227		190		(37		)
Commercial and industrial
Principal deferral	2	$	670	$	638	$	(32	)
Maturity date extension	1	751		739		(12		)
Chapter 7 bankruptcy(3)	1	3		1		(2		)
Residential mortgage
Principal deferral	2	153		149		(4		)
Interest rate reduction	1	54		54		—
Chapter 7 bankruptcy(3)	8	617		592		(25		)
Home Equity
Principal deferral	1	174		17		(157		)
Chapter 7 bankruptcy(3)	30	1,032		982		(50		)
Installment and other consumer
Chapter 7 bankruptcy(3)	11	104		91		(13		)
Total by Concession Type
Principal deferral	9	3,769		3,298		(471		)
Interest rate reduction	1	54		54		—
Interest rate reduction and maturity date extension	2	664		636		(28		)
Principal forgiveness (2)	1	4,339		4,216		(123		)
Maturity date extension	2	970		958		(12		)
Chapter 7 bankruptcy(3)	56	1,983		1,856		(127		)
Total	71	$	11,779	$	11,018	$	(761	)

(1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end.

(2) This loan had debt forgiveness of $0.1 million to the customer; however, the loan was previously charged-off to a balance below the actual contractual balance.

(3) Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.

During 2014, we modified six loans that were not considered to be TDRs, including four C&I loans for $3.2 million and two CRE loans for $1.2 million. The modifications primarily represented instances where we were adequately compensated through additional collateral or a higher interest rate or there was an insignificant delay in payment. As of December 31, 2014, we have no commitments to lend additional funds on any TDRs.

We returned nine TDRs to accruing status during the twelve months ended December 31, 2014 totaling $1.9 million. We returned six TDRs to accruing status during 2013 totaling $6.9 million.

87

NOTE 7. LOANS AND LOANS HELD FOR SALE -- continued

Defaulted TDRs are loans having a payment default of 90 days or more after the restructuring takes place. The following table is a summary of TDRs which defaulted during the years ended December 31, 2014 and 2013 that had been restructured within the last 12 months prior to defaulting:

	Defaulted TDRs
	For the Year Ended December 31, 2014			For the Year Ended December 31, 2013
(dollars in thousands)	Number of Defaults	Recorded Investment		Number of Defaults	Recorded Investment
Commercial real estate	—	$	—	1	$	75
Commercial and industrial	—	—		2	438
Residential real estate	1	20		8	607
Home equity	2	44		6	193
Total	3	$	64	17	$	1,313

The following table is a summary of nonperforming assets as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Nonperforming Assets
Nonaccrual loans	$	7,021	$	12,387
Nonaccrual TDRs	5,436		10,067
Total nonaccrual loans	12,457		22,454
OREO	166		410
Total Nonperforming Assets	$	12,623	$	22,864

OREO consists of five properties and is included in other assets in the Consolidated Balance Sheets. It is our policy to obtain OREO appraisals on an annual basis.

We have granted loans to certain officers and directors of S&T as well as to certain affiliates of the officers and directors in the ordinary course of business. These loans were made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with unrelated persons and did not involve more than normal risk of collectability.

The following table presents a summary of the aggregate amount of loans to any such persons as of December 31:

(dollars in thousands)	2014			2013
Balance at beginning of year	$	23,848		$	36,075
New loans	27,799			22,534
Repayments	(24,279		)	(34,761		)
Balance at End of Year	$	27,368		$	23,848

NOTE 8. ALLOWANCE FOR LOAN LOSSES

We maintain an ALL at a level determined to be adequate to absorb estimated probable credit losses inherent in the loan portfolio as of the balance sheet date. We develop and document a systematic ALL methodology based on the following portfolio segments: 1) CRE, 2) C&I, 3) Commercial Construction, 4) Consumer Real Estate and 5) Other Consumer.

The following are key risks within each portfolio segment:

CRE—Loans secured by commercial purpose real estate, including both owner occupied properties and investment properties for various purposes such as hotels, strip malls and apartments. Operations of the individual projects as well as global cash flows of the debtors are the primary sources of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the collateral type as well as the business prospects of the lessee, if the project is not owner occupied.

88

NOTE 8. ALLOWANCE FOR LOAN LOSSES -- continued

C&I—Loans made to operating companies or manufacturers for the purpose of production, operating capacity, accounts receivable, inventory or equipment financing. Cash flow from the operations of the company is the primary source of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the industry of the company. Collateral for these types of loans often do not have sufficient value in a distressed or liquidation scenario to satisfy the outstanding debt.

Commercial Construction—Loans made to finance construction of buildings or other structures, as well as to finance the acquisition and development of raw land for various purposes. While the risk of these loans is generally confined to the construction period, if there are problems, the project may not be complete, and as such, may not provide sufficient cash flow on its own to service the debt or have sufficient value in a liquidation to cover the outstanding principal. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the type of project and the experience and resources of the developer.

Consumer Real Estate—Loans secured by first and second liens such as home equity loans, home equity lines of credit and 1-4 family residences, including purchase money mortgages. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The state of the local housing market can also have a significant impact on this segment because low demand and/or declining home values can limit the ability of borrowers to sell a property and satisfy the debt.

Other Consumer—Loans made to individuals that may be secured by assets other than 1-4 family residences, as well as unsecured loans. This segment includes auto loans, unsecured loans and lines and credit cards. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The value of the collateral, if there is any, is less likely to be a source of repayment due to less certain collateral values.

We further assess risk within each portfolio segment by pooling loans with similar risk characteristics. For the commercial loan classes, the most important indicator of risk is the internally assigned risk rating, including pass, special mention and substandard. Consumer loans are pooled by type of collateral, lien position and LTV ratio for Consumer Real Estate loans. Historical loss rates are applied to these loan pools to determine the reserve for loans collectively evaluated for impairment.

The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented:

	December 31, 2014
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non- performing		Total Past Due Loans		Total Loans
Commercial real estate	$	1,674,930	$	2,548	$	323	$	4,435	$	7,306	$	1,682,236
Commercial and industrial	991,136		1,227		153		1,622		3,002		994,138
Commercial construction	214,174		—		—		1,974		1,974		216,148
Residential mortgage	485,465		565		1,220		2,336		4,121		489,586
Home equity	414,303		1,756		445		2,059		4,260		418,563
Installment and other consumer	65,111		352		73		31		456		65,567
Consumer construction	2,508		—		—		—		—		2,508
Total	$	3,847,627	$	6,448	$	2,214	$	12,457	$	21,119	$	3,868,746

89

NOTE 8. ALLOWANCE FOR LOAN LOSSES -- continued

	December 31, 2013
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non- performing		Total Past Due Loans		Total Loans
Commercial real estate	$	1,595,590	$	1,209	$	207	$	10,750	$	12,166	$	1,607,756
Commercial and industrial	836,276		2,599		278		3,296		6,173		842,449
Commercial construction	139,133		1,049		751		2,742		4,542		143,675
Residential mortgage	481,260		828		1,666		3,338		5,832		487,092
Home equity	408,777		2,468		659		2,291		5,418		414,195
Installment and other consumer	67,420		382		44		37		463		67,883
Consumer construction	3,149		—		—		—		—		3,149
Total	$	3,531,605	$	8,535	$	3,605	$	22,454	$	34,594	$	3,566,199

We continually monitor the commercial loan portfolio through an internal risk rating system. Loan risk ratings are assigned based upon the creditworthiness of the borrower and are reviewed on an ongoing basis according to our internal policies. Loans within the pass rating generally have a lower risk of loss than loans risk rated as special mention and substandard.

Our risk ratings are consistent with regulatory guidance and are as follows:

Pass—The loan is currently performing and is of high quality.

Special Mention—A special mention loan has potential weaknesses that warrant management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects or in the strength of our credit position at some future date. Economic and market conditions, beyond the borrower’s control, may in the future necessitate this classification.

Substandard—A substandard loan is not adequately protected by the net worth and/or paying capacity of the borrower or by the collateral pledged, if any. Substandard loans have a well-defined weakness, or weaknesses that jeopardize the liquidation of the debt. These loans are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected.

The following tables present the recorded investment in commercial loan classes by internally assigned risk ratings as of the dates presented:

	December 31, 2014
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	1,635,132	97.2	%	$	948,663	95.4	%	$	196,520	90.9	%	$	2,780,315	96.1	%
Special mention	23,597		1.4	%	30,357		3.1	%	12,014		5.6	%	65,968		2.3	%
Substandard	23,507		1.4	%	15,118		1.5	%	7,614		3.5	%	46,239		1.6	%
Total	$	1,682,236	100.0	%	$	994,138	100.0	%	$	216,148	100.0	%	$	2,892,522	100.0	%

	December 31, 2013
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	1,519,720	94.5	%	$	792,029	94.0	%	$	119,177	82.9	%	$	2,430,926	93.7	%
Special mention	57,073		3.6	%	34,085		4.1	%	15,621		10.9	%	106,779		4.1	%
Substandard	30,963		1.9	%	16,335		1.9	%	8,877		6.2	%	56,175		2.2	%
Total	$	1,607,756	100.0	%	$	842,449	100.0	%	$	143,675	100.0	%	$	2,593,880	100.0	%

We monitor the delinquent status of the consumer portfolio on a monthly basis. Loans are considered nonperforming when interest and principal are 90 days or more past due or management has determined that a material deterioration in the borrower’s financial condition exists. The risk of loss is generally highest for nonperforming loans.

The following tables present the recorded investment in consumer loan classes by performing and nonperforming status as of the dates presented:

90

NOTE 8. ALLOWANCE FOR LOAN LOSSES -- continued

	December 31, 2014
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	487,250	99.5	%	$	416,504	99.5	%	$	65,536	99.9	%	$	2,508	100.0	%	$	971,798	99.5	%
Nonperforming	2,336		0.5	%	2,059		0.5	%	31		0.1	%	—		—	%	4,426		0.5	%
Total	$	489,586	100.0	%	$	418,563	100.0	%	$	65,567	100.0	%	$	2,508	100.0	%	$	976,224	100.0	%

	December 31, 2013
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	483,754	99.3	%	$	411,904	99.4	%	$	67,846	99.9	%	$	3,149	100.0	%	$	966,653	99.4	%
Nonperforming	3,338		0.7	%	2,291		0.6	%	37		0.1	%	—		—	%	5,666		0.6	%
Total	$	487,092	100.0	%	$	414,195	100.0	%	$	67,883	100.0	%	$	3,149	100.0	%	$	972,319	100.0	%

We individually evaluate all substandard and nonaccrual commercial loans greater than $0.5 million for impairment. Loans are considered to be impaired when based upon current information and events it is probable that we will be unable to collect all principal and interest payments due according to the original contractual terms of the loan agreement. All TDRs will be reported as an impaired loan for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is expected that the remaining principal and interest will be fully collected according to the restructured agreement. For all TDRs, regardless of size, as well as all other impaired loans, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate.

91

NOTE 8. ALLOWANCE FOR LOAN LOSSES -- continued

The following table presents investments in loans considered to be impaired and related information on those impaired loans as of the dates presented:

	December 31, 2014						December 31, 2013
(dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—	$	—	$	—
Commercial and industrial	—		—		—		—		—		—
Commercial construction	—		—		—		681		1,383		25
Consumer real estate	43		43		43		53		53		53
Other consumer	20		20		11		33		33		19
Total with a Related Allowance Recorded	63		63		54		767		1,469		97
Without a related allowance recorded:
Commercial real estate	19,890		25,262		—		26,968		35,474		—
Commercial and industrial	9,218		9,449		—		9,580		9,703		—
Commercial construction	7,605		11,293		—		7,391		12,353		—
Consumer real estate	7,159		7,733		—		8,026		9,464		—
Other consumer	42		48		—		124		128		—
Total without a Related Allowance Recorded	43,914		53,785		—		52,089		67,122		—
Total:
Commercial real estate	19,890		25,262		—		26,968		35,474		—
Commercial and industrial	9,218		9,449		—		9,580		9,703		—
Commercial construction	7,605		11,293		—		8,072		13,736		25
Consumer real estate	7,202		7,776		43		8,079		9,517		53
Other consumer	62		68		11		157		161		19
Total	$	43,977	$	53,848	$	54	$	52,856	$	68,591	$	97

92

NOTE 8. ALLOWANCE FOR LOAN LOSSES -- continued

The following table summarizes investments in loans considered to be impaired and related information on those impaired loans for the years presented:

	For the Year Ended
	December 31, 2014				December 31, 2013
(dollars in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	1,895	$	—
Commercial and industrial	—		—		—		—
Commercial construction	—		—		1,652		49
Consumer real estate	48		4		60		6
Other consumer	24		2		24		4
Total with a Related Allowance Recorded	72		6		3,631		59
Without a related allowance recorded:
Commercial real estate	20,504		684		29,314		929
Commercial and industrial	9,246		241		11,439		254
Commercial construction	8,145		227		14,112		326
Consumer real estate	7,027		396		8,714		436
Other consumer	56		2		114		6
Total without a Related Allowance Recorded	44,978		1,550		63,693		1,951
Total:
Commercial real estate	20,504		684		31,209		929
Commercial and industrial	9,246		241		11,439		254
Commercial construction	8,145		227		15,764		375
Consumer real estate	7,074		400		8,774		442
Other consumer	81		4		138		10
Total	$	45,050	$	1,556	$	67,324	$	2,010

The following tables detail activity in the ALL for the periods presented:

	2014
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of year	$	18,921		$	14,433		$	5,374		$	6,362		$	1,165		$	46,255
Charge-offs	(2,041		)	(1,267		)	(712		)	(1,200		)	(1,133		)	(6,353		)
Recoveries	1,798			3,647			146			350			353			6,294
Net (Charge-offs)/ Recoveries	(243		)	2,380			(566		)	(850		)	(780		)	(59		)
Provision for loan losses	1,486			(3,145		)	1,285			821			1,268			1,715
Balance at End of Year	$	20,164		$	13,668		$	6,093		$	6,333		$	1,653		$	47,911

93

NOTE 8. ALLOWANCE FOR LOAN LOSSES -- continued

	2013
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of year	$	25,246		$	7,759		$	7,500		$	5,058		$	921		$	46,484
Charge-offs	(4,601		)	(2,714		)	(4,852		)	(2,407		)	(1,002		)	(15,576		)
Recoveries	3,388			2,142			531			651			324			7,036
Net (Charge-offs)/ Recoveries	(1,213		)	(572		)	(4,321		)	(1,756		)	(678		)	(8,540		)
Provision for loan losses	(5,112		)	7,246			2,195			3,060			922			8,311
Balance at End of Year	$	18,921		$	14,433		$	5,374		$	6,362		$	1,165		$	46,255

The following tables present the ALL and recorded investments in loans by category as of December 31:

	2014
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	20,164	$	20,164	$	19,890	$	1,662,346	$	1,682,236
Commercial and industrial	—		13,668		13,668		9,218		984,920		994,138
Commercial construction	—		6,093		6,093		7,605		208,543		216,148
Consumer real estate	43		6,290		6,333		7,202		903,455		910,657
Other consumer	11		1,642		1,653		62		65,505		65,567
Total	$	54	$	47,857	$	47,911	$	43,977	$	3,824,769	$	3,868,746

	2013
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	18,921	$	18,921	$	26,968	$	1,580,788	$	1,607,756
Commercial and industrial	—		14,433		14,433		9,580		832,869		842,449
Commercial construction	25		5,349		5,374		8,072		135,603		143,675
Consumer real estate	53		6,309		6,362		8,079		896,357		904,436
Other consumer	19		1,146		1,165		157		67,726		67,883
Total	$	97	$	46,158	$	46,255	$	52,856	$	3,513,343	$	3,566,199

NOTE 9. PREMISES AND EQUIPMENT

The following table is a summary of premises and equipment as of the dates presented:

	December 31,
(dollars in thousands)	2014			2013
Land	$	6,193		$	6,193
Premises	44,690			42,320
Furniture and equipment	26,661			25,139
Leasehold improvements	6,545			5,944
	84,089			79,596
Accumulated depreciation	(45,923		)	(42,981		)
Total	$	38,166		$	36,615

Depreciation expense related to premises and equipment was $3.5 million in 2014, $3.5 million in 2013 and $3.9 million in 2012.

Certain banking facilities are leased under arrangements expiring at various dates until the year 2054. We account for these leases on a straight-line basis due to escalation clauses. All leases are accounted for as operating leases, except for one capital lease. Rental expense for premises amounted to $2.7 million, $2.5 million and $2.4 million in 2014, 2013 and 2012. Included in

94

NOTE 9. PREMISES AND EQUIPMENT -- continued

the rental expense for premises are leases entered into with two S&T directors, which totaled $0.2 million each year in 2014, 2013 and 2012.

Minimum annual rental and renewal option payments for each of the following five years and thereafter are approximately:

(dollars in thousands)	Operating		Capital		Total
2015	$	2,274	$	76	$	2,350
2016	2,200		76		2,276
2017	2,178		76		2,254
2018	2,143		76		2,219
2019	2,156		77		2,233
Thereafter	40,352		687		41,039
Total	$	51,303	$	1,068	$	52,371

NOTE 10. GOODWILL AND OTHER INTANGIBLE ASSETS

The following table presents goodwill as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Balance at beginning of year	$	175,820	$	175,733
Additions	—		87
Balance at End of Year	$	175,820	$	175,820

Goodwill represents the excess of the purchase price over the fair value of net assets acquired. Goodwill is reviewed for impairment annually or more frequently if it is determined that a triggering event has occurred. Based upon our qualitative assessment performed for our annual impairment analysis, we concluded that it is more likely than not that the fair value of the reporting units exceeds the carrying value. In general, the overall macroeconomic conditions and more specifically the economic conditions of the banking industry have continued to improve. Additionally, our overall performance has improved and we did not identify any other facts and circumstances causing us to conclude that it is more likely than not that the fair value of the reporting units would be less than the carrying value.

The following table shows a summary of intangible assets as of the dates presented:

	December 31,
(dollars in thousands)	2014			2013
Gross carrying amount at beginning of year	$	16,401		$	16,401
Additions	—			—
Accumulated amortization	(13,770		)	(12,642		)
Balance at End of Year	$	2,631		$	3,759

Intangible assets as of December 31, 2014 consisted of $2.1 million for the acquisition of core deposits, $0.1 million for the acquisition of wealth management relationships and $0.4 million for the acquisition of insurance contract relationships. We determined the amount of identifiable intangible assets based upon independent core deposit, wealth management and insurance contract valuations. Other intangible assets are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. There were no triggering events in 2014 requiring an impairment analysis to be completed.

95

NOTE 10. GOODWILL AND OTHER INTANGIBLE ASSETS -- continued

Amortization expense on finite-lived intangible assets totaled $1.1 million, $1.6 million and $1.7 million for 2014, 2013 and 2012. The following is a summary of the expected amortization expense for finite-lived intangibles assets, assuming no new additions, for each of the five years following December 31, 2014:

(dollars in thousands)	Amount
2015	$	883
2016	645
2017	500
2018	134
2019	122
Total	$	2,284

NOTE 11. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

The following table indicates the amount representing the value of derivative assets and derivative liabilities at December 31:

	Derivatives (included in Other Assets)				Derivatives (included in Other Liabilities)
(dollars in thousands)	2014		2013		2014		2013
Derivatives not Designated as Hedging Instruments
Interest Rate Swap Contracts—Commercial Loans
Fair value	$	12,981	$	13,698	$	12,953	$	13,647
Notional amount	245,152		261,754		245,152		261,754
Collateral posted	—		—		12,059		12,611
Interest Rate Lock Commitments—Mortgage Loans
Fair value	235		85		—		—
Notional amount	8,822		3,989		—		—
Forward Sale Contracts—Mortgage Loans
Fair value	—		34		57		—
Notional amount	—		5,250		7,789		—

The following table indicates the gross amounts of commercial loan swap derivative assets and derivative liabilities, the amounts offset and the carrying values in the Consolidated Balance Sheets at December 31:

	Derivatives (included in Other Assets)						Derivatives (included in Other Liabilities)
(dollars in thousands)	2014			2013			2014			2013
Derivatives not Designated as Hedging Instruments
Gross amounts recognized	$	13,203		$	14,012		$	13,175		$	13,961
Gross amounts offset	(222		)	(314		)	(222		)	(314		)
Net amounts presented in the Consolidated Balance Sheets	12,981			13,698			12,953			13,647
Gross amounts not offset(1)	—			—			(12,059		)	(12,611		)
Net Amount	$	12,981		$	13,698		$	894		$	1,036

(1) Amounts represent posted collateral.

96

NOTE 11. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES -- continued

The following table indicates the gain or loss recognized in income on derivatives for the years ended December 31:

(dollars in thousands)	2014			2013			2012
Derivatives not Designated as Hedging Instruments
Interest rate swap contracts—commercial loans	$	(24	)	$	(174	)	$	101
Interest rate lock commitments—mortgage loans	150			(382		)	223
Forward sale contracts—mortgage loans	(90		)	82			47
Total Derivative Gain (Loss)	$	36		$	(474	)	$	371

NOTE 12. MORTGAGE SERVICING RIGHTS

For the years ended December 31, 2014, 2013 and 2012, the 1-4 family mortgage loans that were sold to Fannie Mae amounted to $40.1 million, $62.9 million and $82.9 million. At December 31, 2014, 2013 and 2012 our servicing portfolio totaled $325.8 million, $327.4 million and $329.2 million.

The following table indicates MSRs and the net carrying values:

(dollars in thousands)	Servicing Rights			Valuation Allowance			Net Carrying Value
Balance at December 31, 2012	$	3,206		$	(1,100	)	$	2,106
Additions	780			—			780
Amortization	(778		)	—			(778		)
Temporary impairment recapture	—			811			811
Balance at December 31, 2013	$	3,208		$	(289	)	$	2,919
Additions	431			—			431
Amortization	(531		)	—			(531		)
Temporary impairment	—			(2		)	(2		)
Balance at December 31, 2014	$	3,108		$	(291	)	$	2,817

NOTE 13. DEPOSITS

The following table presents the composition of deposits at December 31 and interest expense for the years ended December 31:

	2014				2013				2012
(dollars in thousands)	Balance		Interest Expense		Balance		Interest Expense		Balance		Interest Expense
Noninterest-bearing demand	$	1,083,919	$	—	$	992,779	$	—	$	960,980	$	—
Interest-bearing demand	335,099		19		312,790		75		316,760		146
Money market	376,612		572		281,403		446		361,233		528
Savings	1,027,095		1,607		994,805		1,735		965,571		2,356
Certificates of deposit	1,086,117		7,930		1,090,531		9,150		1,033,884		13,766
Total	$	3,908,842	$	10,128	$	3,672,308	$	11,406	$	3,638,428	$	16,796

The aggregate of all certificates of deposit over $100,000 amounted to $382.2 million and $433.8 million at December 31, 2014 and 2013.

97

NOTE 13. DEPOSITS -- continued

The following table indicates the scheduled maturities of certificates of deposit at December 31, 2014:

(dollars in thousands)	Amount
2015	$	628,889
2016	143,728
2017	230,051
2018	45,139
2019	30,295
Thereafter	8,015
Total	$	1,086,117

NOTE 14. SHORT-TERM BORROWINGS

Short-term borrowings are for terms under one year and were comprised of retail repurchase agreements, or REPOs, and FHLB advances. We define REPOs with our local retail customers as retail REPOs. Securities pledged as collateral under these REPO financing arrangements cannot be sold or repledged by the secured party and are therefore accounted for as a secured borrowing. FHLB advances are for various terms secured by a blanket lien on residential mortgages and other real estate secured loans.

The following table represents the composition of short-term borrowings, the weighted average interest rate as of December 31 and interest expense for the years ended December 31:

	2014						2013						2012
(dollars in thousands)	Balance		Weighted Average Interest Rate		Interest Expense		Balance		Weighted Average Interest Rate		Interest Expense		Balance		Weighted Average Interest Rate		Interest Expense
REPOs	$	30,605	0.01	%	$	3	$	33,847	0.01	%	$	62	$	62,582	0.20	%	$	82
FHLB advances	290,000		0.31	%	511		140,000		0.30	%	279		75,000		0.19	%	123
Total Short-term Borrowings	$	320,605	0.27	%	$	514	$	173,847	0.24	%	$	341	$	137,582	0.19	%	$	205

NOTE 15. LONG-TERM BORROWINGS AND SUBORDINATED DEBT

Our long-term borrowings at the Pittsburgh FHLB as of December 31, 2014 and 2013 were $19.3 million and $21.6 million. FHLB borrowings are collateralized by a blanket lien on residential mortgages and other real estate secured loans. Total loans pledged as collateral at the FHLB were $2.3 billion at year end 2014. The FHLB has eliminated the requirement that it may require collateral delivery for any portion of credit exposure that exceeds 70 percent of maximum borrowing capacity. We were eligible to borrow up to an additional $1.3 billion based on qualifying collateral, to a maximum borrowing capacity of $1.6 billion.

The following table represents the balance of long-term borrowings, the weighted average interest rate as of December 31 and interest expense for the years ended December 31:

(dollars in thousand)	2014			2013			2012
Long-term borrowings	$	19,442		$	21,810		$	34,101
Weighted average interest rate	3.00		%	3.01		%	3.17		%
Interest expense	$	617		$	746		$	1,107

Scheduled annual maturities and average interest rates for all of our long-term debt, including a capital lease of $0.2 million, for each of the five years and thereafter subsequent to December 31, 2014 are as follows:

98

NOTE 15. LONG-TERM BORROWINGS AND SUBORDINATED DEBT -- continued

(dollars in thousands)	Balance		Average Rate
2015	$	2,399	3.41	%
2016	2,330		3.44	%
2017	2,412		3.53	%
2018	2,496		3.67	%
2019	2,514		3.13	%
Thereafter	7,291		2.20	%
Total	$	19,442	2.97	%

Junior Subordinated Debt Securities

The following table represents the composition of junior subordinated debt securities at December 31 and the interest expense for the years ended December 31:

	2014				2013				2012
(dollars in thousands)	Balance		Interest Expense		Balance		Interest Expense		Balance		Interest Expense
2006 Junior subordinated debt	$	25,000	$	463	$	25,000	$	475	$	25,000	$	523
2008 Junior subordinated debt—trust preferred securities	20,619		759		20,619		770		20,619		808
2008 Junior subordinated debt	—		—		—		422		20,000		818
2008 Junior subordinated debt	—		—		—		403		25,000		766
Total	$	45,619	$	1,222	$	45,619	$	2,070	$	90,619	$	2,915

The following table summarizes the key terms of our junior subordinated debt securities:

(dollars in thousands)	2006 Junior Subordinated Debt	2008 Trust Preferred Securities	2008 Junior Subordinated Debt	2008 Junior Subordinated Debt
Junior Subordinated Debt	$25,000	—	$20,000	$25,000
Trust Preferred Securities	—	$20,619	—	—
Stated Maturity Date	12/15/2036	3/15/2038	6/15/2018	5/30/2018
Optional redemption date at par	Any time after 9/15/2011	Any time after 3/15/2013	Any time after 6/15/2013	Any time after 5/30/2013
Regulatory Capital	Tier 2	Tier 1	Tier 2	Tier 2
Interest Rate	3 month LIBOR plus 160 bps	3 month LIBOR plus 350 bps	3 month LIBOR plus 350 bps	3 month LIBOR plus 250 bps
Interest Rate at December 31, 2014	1.84%	3.74%	—%	—%

We completed a private placement of the trust preferred securities to a financial institution during the first quarter of 2008. As a result, we own 100 percent of the common equity of STBA Capital Trust I. The trust was formed to issue mandatorily redeemable capital securities to third-party investors. The proceeds from the sale of the securities and the issuance of the common equity by STBA Capital Trust I were invested in junior subordinated debt securities issued by us. The third party investors are considered the primary beneficiaries; therefore, the trust qualifies as a VIE, but is not consolidated into our financial statements. STBA Capital Trust I pays dividends on the securities at the same rate as the interest paid by us on the junior subordinated debt held by STBA Capital Trust I.

We repaid $45.0 million of junior subordinated debt in June 2013 because of its diminishing regulatory capital benefit and the future positive impact on net interest income. We replaced the funding primarily with FHLB short-term advances.

99

NOTE 16. COMMITMENTS AND CONTINGENCIES

Commitments

The following table sets forth our commitments and letters of credit as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Commitments to extend credit	$	1,158,628	$	1,038,529
Standby letters of credit	73,584		78,639
Total	$	1,232,212	$	1,117,168

Estimates of the fair value of these off-balance sheet items were not made because of the short-term nature of these arrangements and the credit standing of the counterparties.

Our allowance for unfunded loan commitments totaled $2.3 million at December 31, 2014 and $2.9 million at December 31, 2013.

We have future commitments with third party vendors for data processing and communication charges. We had data processing and communication expense of $9.8 million , $9.5 million and $10.3 million for 2014, 2013 and 2012. Included in the 2013 expense is $0.8 million in one-time merger related expense.

The following table sets forth the future estimated payments related to data processing and communication charges for each of the five years following December 31, 2014:

(dollars in thousands)	Total
2015	$	11,326
2016	10,715
2017	11,057
2018	11,411
2019	11,777
Total	$	56,286

Litigation

In the normal course of business, we are subject to various legal and administrative proceedings and claims. While any type of litigation contains a level of uncertainty, we believe that the outcome of such proceedings or claims pending will not have a material adverse effect on our consolidated financial position or results of operations.

NOTE 17. INCOME TAXES

Income tax expense (benefit) for the years ended December 31 are comprised of:

(dollars in thousands)	2014		2013			2012
Current	$	15,979	$	16,836		$	6,223
Deferred	1,536		(2,358		)	1,038
Total	$	17,515	$	14,478		$	7,261

The provision for income taxes differs from the amount computed by applying the statutory federal income tax rate to income before income taxes. We ordinarily generate an annual effective tax rate that is less than the statutory rate of 35 percent primarily due to benefits resulting from tax-exempt interest, excludable dividend income, tax-exempt income on BOLI and tax benefits associated with LIHTC from certain partnership investments.

100

NOTE 17. INCOME TAXES -- continued

The statutory to effective tax rate reconciliation for the years ended December 31 is as follows:

	2014		2013		2012
Statutory tax rate	35.0	%	35.0	%	35.0	%
Low income housing tax credits	(5.8	)%	(6.8	)%	(10.5	)%
Tax-exempt interest	(4.6	)%	(4.5	)%	(6.7	)%
Bank owned life insurance	(0.8	)%	(1.0	)%	(1.2	)%
Other	(0.6	)%	(0.4	)%	0.9	%
Effective Tax Rate	23.2	%	22.3	%	17.5	%

Significant components of our temporary differences were as follows at December 31:

(dollars in thousands)	2014			2013
Deferred Tax Liabilities:
Net unrealized holding gains on securities available-for-sale	$	(3,783	)	$	—
Prepaid pension	(3,472		)	(3,730		)
Deferred loan income	(2,165		)	(1,614		)
Purchase accounting adjustments	(631		)	(801		)
Depreciation on premises and equipment	(1,590		)	(1,061		)
Other	(812		)	(823		)
Total Deferred Tax liabilities	(12,453		)	(8,029		)
Deferred Tax Assets:
Net unrealized holding losses on securities available-for-sale	—			361
Allowance for loan losses	17,567			18,890
Other employee benefits	2,453			2,369
Low income housing partnerships	4,049			3,147
Net adjustment to funded status of pension	11,089			6,495
Impairment of securities	1,313			1,313
Delinquent interest on nonaccrual loans	—			1,626
State net operating loss carryforwards	2,249			1,828
Other	4,668			3,950
Gross Deferred Tax Assets	43,388			39,979
Less: Valuation allowance	(2,249		)	(2,199		)
Total Deferred Tax Assets	41,139			37,780
Net Deferred Tax Asset	$	28,686		$	29,751

We establish a valuation allowance when it is more likely than not that we will not be able to realize the benefit of the deferred tax assets. Except for Pennsylvania net operating losses, or NOLs, we have determined that a valuation allowance is unnecessary for the deferred tax assets because it is more likely than not that these assets will be realized through future reversals of existing temporary differences and through future taxable income. The valuation allowance is reviewed quarterly and adjusted based on management’s assessments of realizable deferred tax assets. Gross deferred tax assets were reduced by a valuation allowance of $2.2 million in 2014 related to Pennsylvania income tax NOLs. The PA NOL carryforwards total $22.5 million and will expire in the years 2020-2034.

101

NOTE 17. INCOME TAXES -- continued

Unrecognized Tax Benefits

A reconciliation of the change in Federal and State gross unrecognized tax benefits, or UTB, for the years ended December 31:

(dollars in thousands)	2014			2013		2012
Balance at beginning of year	$	1,902		$	978	$	200
Prior period tax positions
Increase	55			924		—
Decrease	(1,673		)	—		—
Current period tax positions	—			—		913
Reductions for statute of limitations expirations	—			—		(135		)
Balance at End of Year	$	284		$	1,902	$	978
Amount That Would Affect the Effective Tax Rate if Recognized	$	184		$	148	$	147

We classify interest and penalties as an element of tax expense. We monitor changes in tax statutes and regulations to determine if significant changes will occur over the next 12 months. In 2014, we reduced our reserve for tax and interest by $1.7 million to eliminate our UTB relating to Bad Debts that existed at December 31, 2013. Upon review of Large Business & International Directive 04-1014-008 issued October 24, 2014, we determined it is more likely than not upon examination our filing position, for which we previously maintained a reserve for UTB, would be upheld. As of December 31, 2014, no other significant changes to UTB are projected, however, tax audit examinations are possible.

We recognized $0.1 million related to interest in 2014, $0.2 million related to interest in 2013 and 2012 in the Consolidated Statements of Net Income.

During 2013, the IRS completed its examination of our 2010 tax year. The examination was closed with no material adjustments impacting tax expense. As of December 31, 2014, all income tax returns filed for the tax years 2011 through 2013 remain subject to examination by the IRS.

NOTE 18. TAX EFFECTS ON OTHER COMPREHENSIVE INCOME (LOSS)

The following tables present the tax effects of the components of other comprehensive income (loss) for the years ended December 31:

(dollars in thousands)	Pre-Tax Amount			Tax (Expense) Benefit			Net of Tax Amount
2014
Net change in unrealized gains on securities available-for-sale	$	11,825		$	(4,139	)	$	7,686
Net available-for-sale securities gains reclassified into earnings	(41		)	15			(26		)
Adjustment to funded status of employee benefit plans	(13,394		)	4,595			(8,799		)
Other Comprehensive Income/(Loss)	$	(1,610	)	$	471		$	(1,139	)
2013
Net change in unrealized losses on securities available-for-sale	$	(16,928	)	$	5,925		$	(11,003	)
Net available-for-sale securities gains reclassified into earnings	(5		)	2			(3		)
Adjustment to funded status of employee benefit plans	18,299			(6,405		)	11,894
Other Comprehensive Income	$	1,366		$	(478	)	$	888
2012
Net change in unrealized gains on securities available-for-sale	$	4,097		$	(1,434	)	$	2,663
Net available-for-sale securities gains reclassified into earnings	(3,016		)	1,055			(1,961		)
Adjustment to funded status of employee benefit plans	(271		)	95			(176		)
Other Comprehensive Income	$	810		$	(284	)	$	526

102

NOTE 19. EMPLOYEE BENEFITS

We maintain a defined benefit pension plan, or Plan, covering substantially all employees hired prior to January 1, 2008. The benefits are based on years of service and the employee’s compensation for the highest five consecutive years in the last 10 years. Contributions are intended to provide for benefits attributed to employee service to date and for those benefits expected to be earned in the future.

The following table summarizes the activity in the benefit obligation and Plan assets deriving the funded status, which is recorded in other liabilities in the Consolidated Balance Sheets:

(dollars in thousands)	2014			2013
Change in Projected Benefit Obligation
Projected benefit obligation at beginning of year	$	95,969		$	102,454
Service cost	2,369			2,767
Interest cost	4,470			3,985
Actuarial loss (gain)	16,020			(7,167		)
Benefits paid	(5,704		)	(6,070		)
Projected Benefit Obligation at End of Year	$	113,124		$	95,969
Change in Plan Assets
Fair value of plan assets at beginning of year	$	89,556		$	81,088
Actual return on plan assets	9,634			14,538
Benefits paid	(5,704		)	(6,070		)
Fair Value of Plan Assets at End of Year	$	93,486		$	89,556
Funded Status	$	(19,638	)	$	(6,413	)

The following table sets forth the amounts recognized in accumulated other comprehensive income (loss) at December 31:

(dollars in thousands)	2014			2013
Prior service credit	$	(1,167	)	$	(1,304	)
Net actuarial loss	30,726			18,373
Total (Before Tax Effects)	$	29,559		$	17,069

Below are the actuarial weighted average assumptions used in determining the benefit obligation:

	2014		2013
Discount rate	4.00	%	4.75	%
Rate of compensation increase	3.00	%	3.00	%

103

NOTE 19. EMPLOYEE BENEFITS -- continued

The following table summarizes the components of net periodic pension cost and other changes in Plan assets and benefit obligation recognized in other comprehensive income (loss) for the years ended December 31:

(dollars in thousands)	2014			2013			2012
Components of Net Periodic Pension Cost
Service cost—benefits earned during the period	$	2,369		$	2,767		$	2,788
Interest cost on projected benefit obligation	4,470			3,985			4,358
Expected return on plan assets	(6,907		)	(6,207		)	(5,564		)
Amortization of prior service cost (credit)	(137		)	(138		)	(137		)
Recognized net actuarial loss	941			2,425			2,474
Net Periodic Pension Expense	$	736		$	2,832		$	3,919
Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss)
Net actuarial loss (gain)	$	13,294		$	(15,499	)	$	2,477
Recognized net actuarial loss	(941		)	(2,425		)	(2,474		)
Recognized prior service credit	137			138			137
Total (Before Tax Effects)	$	12,490		$	(17,786	)	$	140
Total Recognized in Net Benefit Cost and Other Comprehensive Income (Loss) (Before Tax Effects)	$	13,226		$	(14,954	)	$	4,059

The following table summarizes the actuarial weighted average assumptions used in determining net periodic pension cost:

	2014		2013		2012
Discount rate	4.75	%	4.00	%	4.75	%
Rate of compensation increase	3.00	%	3.00	%	4.00	%
Expected return on assets	8.00	%	8.00	%	8.00	%

The net actuarial loss included in accumulated other comprehensive income (loss) expected to be recognized in net periodic pension cost during the year ended December 31, 2015 is $1.9 million. The prior service credit expected to be recognized during the same period is $0.1 million.

The accumulated benefit obligation for the Plan was $104.3 million at December 31, 2014 and $88.3 million at December 31, 2013.

We consider many factors when setting the assumed rate of return on Plan assets. As a general guideline the assumed rate of return is equal to the weighted average of the expected returns for each asset category and is estimated based on historical returns as well as expected future returns. The weighted average discount rate is derived from corporate yield curves.

S&T Bank’s Retirement Plan Committee determines the investment policy for the Plan. In general, the targeted asset allocation is 50 percent to 70 percent equities and 30 percent to 50 percent fixed income. A strategic allocation within each asset class is employed based on the Plan’s time horizon, risk tolerances, performance expectations and asset class preferences. Investment managers have discretion to invest in any equity or fixed-income asset class, subject to the securities guidelines of the Plan’s Investment Policy Statement.

At this time, S&T Bank is not required to make a cash contribution to the Plan in 2015. No contributions were made during 2014.

104

NOTE 19. EMPLOYEE BENEFITS -- continued

The following table provides information regarding estimated future benefit payments to be paid in each of the next five years and in the aggregate for the five years thereafter:

(dollars in thousands)	Amount
2015	$	6,440
2016	6,437
2017	6,268
2018	6,719
2019	6,637
2020 - 2024	38,984

We also have supplemental executive retirement plans, or SERPs, for certain key employees. The SERPs are unfunded. The projected benefit obligations related to the SERPs were $3.5 million and $2.8 million at December 31, 2014 and 2013. These amounts also represent the net amount recognized in the statement of financial position for the SERPs. Net periodic benefit costs for the SERPs were $0.4 million, $0.4 million and $0.5 million for each of the years ended December 31, 2014, 2013 and 2012. Additionally, $2.1 million and $1.5 million before tax were reflected in accumulated other comprehensive income (loss) at December 31, 2014 and 2013, in relation to the SERPs. The actuarial assumptions used for the SERPs are the same as those used for the Plan.

We maintain a Thrift Plan, a qualified defined contribution plan, in which substantially all employees are eligible to participate. We make matching contributions to the Thrift Plan up to 3.5 percent of participants’ eligible compensation and may make additional profit-sharing contributions as provided by the Thrift Plan. Expense related to these contributions amounted to $1.3 million in 2014, $1.4 million in 2013 and $1.3 million in 2012.

Fair Value Measurements

The following tables present our Plan assets measured at fair value on a recurring basis by fair value hierarchy level at December 31, 2014 and 2013. There were no transfers between Level 1 and Level 2 for items of a recurring basis during the periods presented. There were no purchases or transfers of Level 3 plan assets in 2014.

	December 31, 2014
	Fair Value Asset Classes(1)
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents(2)	$	—	$	5,073	$	—	$	5,073
Fixed Income(3)	26,726		—		—		26,726
Equities:
Equity index mutual funds—international(4)	3,728		—		—		3,728
Domestic Individual Equities(5)	57,085		—		—		57,085
International Individual Equities(6)	874		—		—		874
Total Assets at Fair Value	$	88,413	$	5,073	$	—	$	93,486

(1) Refer to Note 1 Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy.

(2) This asset class includes FDIC insured money market instruments.

(3) This asset class includes a variety of fixed income mutual funds which primarily invests in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar.

(4) The sole investment within this asset class is the Harbor International Institutional fund.

(5) This asset class includes individual domestic equities invested in an active all-cap strategy. It may also include convertible bonds.

(6) This asset class includes American Depository Receipts, or ADR.

105

NOTE 19. EMPLOYEE BENEFITS -- continued

	December 31, 2013
	Fair Value Asset Classes(1)
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents(2)	$	—	$	2,946	$	—	$	2,946
Fixed Income(3)	26,448		—		—		26,448
Equities:
Equity index mutual funds—domestic(4)	1,558		—		—		1,558
Equity index mutual funds—international(5)	2,497		—		—		2,497
Domestic Individual Equities(6)	55,206		—		—		55,206
International Individual Equities(7)	901		—		—		901
Total Assets at Fair Value	$	86,610	$	2,946	$	—	$	89,556

(1) Refer to Note 1 Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy.

(2) This asset class includes FDIC insured money market instruments.

(3) This asset class includes a variety of fixed income mutual funds which primarily invests in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar.

(4) The sole investment within this asset class is S&P 600 index iShares.

(5) The sole investment within this asset class is MSCI EAFE Index iShares.

(6) This asset class includes individual domestic equities invested in an active all-cap strategy. It may also include convertible bonds.

(7) This asset class includes American Depository Receipts, or ADR.

NOTE 20. INCENTIVE AND RESTRICTED STOCK PLAN AND DIVIDEND REINVESTMENT PLAN

We adopted an Incentive Stock Plan in 1992 that provided for granting incentive stock options, nonstatutory stock options, restricted stock and appreciation rights. On October 17, 1994, the 1992 Stock Plan was amended to include outside directors. The 1992 Stock Plan had a maximum of 3,200,000 shares of our common stock and expired ten years from the date of board approval. At December 31, 2002, 3,180,822 nonstatutory stock options and restricted stock had been granted under the 1992 Stock Plan. No further awards will be made under the 1992 Stock Plan. All grants under the 1992 Stock Plan have expired at December 31, 2012.

We adopted an Incentive Stock Plan in 2003 that provides for granting incentive stock options, nonstatutory stock options, restricted stock and appreciation rights. The 2003 Stock Plan has a maximum of 1,500,000 shares of our common stock and expires ten years from the date of board approval. The 2003 Stock Plan is similar to the 1992 Stock Plan, which the 2003 Stock Plan replaced. No further awards will be granted under the 2003 Stock Plan.

We adopted an Incentive Stock Plan in 2014 that provides for cash performance awards and for granting incentive stock options, nonstatutory stock options, restricted stock, restricted stock units and appreciation rights. The 2014 Incentive Plan has a maximum of 750,000 shares of our common stock and expires ten years from the date of board approval. With respect to stock compensation provisions, the 2014 Incentive Plan is similar to the 2003 Stock Plan, which the 2014 Stock Plan replaced.

Stock Options

As of December 31, 2014, 155,500 nonstatutory stock options are outstanding under the 2003 Stock Plan. Nonstatutory stock options granted in 2006 and 2005 are fully vested and have a ten year life. These stock options were fully expensed in 2010.

The fair value of nonstatutory stock option awards under the 2003 Stock Plan were estimated on the date of grant using the Black-Scholes valuation model, which is dependent upon certain assumptions. We use the simplified method in developing the estimated life of the option, whereby the expected life is presumed to be the midpoint between the vesting date and the end of the contractual term. There have been no nonstatutory stock options granted since 2006.

106

NOTE 20. INCENTIVE AND RESTRICTED STOCK PLAN AND DIVIDEND REINVESTMENT PLAN -- continued

The following table summarizes activity for nonstatutory stock options for the years ended December 31:

	2014					2013					2012
	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term
Outstanding at beginning of year	428,900		$	37.36		675,500		$	35.18		757,050		$	34.33
Granted	—		—			—		—			—		—
Exercised	—		—			—		—			—		—
Forfeited	(273,400	)	37.08			(246,600	)	31.39			(81,550	)	27.29
Outstanding at End of Year	155,500		$	37.86	1.0 year	428,900		$	37.36	1.4 years	675,500		$	35.18	2.0 years
Exercisable at End of Year	155,500		$	37.86	1.0 year	428,900		$	37.36	1.4 years	675,500		$	35.18	2.0 years

The aggregate intrinsic value of options outstanding and exercisable was zero as of December 31, 2014, 2013 and 2012. The aggregate intrinsic value represents the total pretax intrinsic value (the difference between our closing stock price on the last trading day of the fourth quarter and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on December 31, 2014.

As of December 31, 2014, 2013 and 2012 all outstanding stock options have vested. During the years ended December 31, 2014, 2013 and 2012 no stock options were exercised.

Restricted Stock

We periodically issue restricted stock to employees and directors, pursuant to our Stock Plans. As of December 31, 2014, 259,673 restricted shares have been granted under the 2003 Stock Plan and 80,455 restricted shares have been granted under the 2014 Stock Plan.

During 2014, 2013 and 2012, we granted 13,824, 18,942 and 19,362 restricted shares of common stock, to outside directors. The 2014 grants were issued under the 2014 Stock Plan and the 2013 and 2012 grants were issued under the 2003 Stock Plan. The grants are part of the compensation arrangement approved by the Compensation and Benefits Committee whereby the directors receive compensation in both the form of cash and restricted shares of common stock. These shares fully vest one year after the date of grant.

Also during 2014, 2013 and 2012, we granted 66,631, 3,247 and 48,008 restricted shares of common stock to senior management. The 2014 grants were issued under the 2014 Stock Plan and the 2013 and 2012 grants were issued under the 2003 Stock Plan. The awards to senior management were granted in accordance with performance levels set by the Compensation and Benefits Committee. During 2013 and 2012 restricted shares were granted on two occasions and have different vesting periods. The restricted stock grants for 2013 of 3,247 shares and for 2012 of 9,897 shares vest fully on the second anniversary of the grant dates. The restricted shares granted under our Long Term Incentive Plan, or LTIP, for 2014 and 2012 of 66,631 and 38,111 shares, respectively consisted of both time and performance-based awards. The 2014 grants were issued under the 2014 Stock Plan and there were no shares granted under the 2003 Stock Plan in 2013. Vesting for the time-based awards is 50 percent after two years and the remaining 50 percent at the end of the third year. The performance-based awards vest at the end of the three year period. During the vesting period, the recipient receives dividends and has the right to vote the unvested shares granted, except for the 2014 LTIP performance-based award. If the recipient leaves S&T before the end of the vesting period, shares will be forfeited except in the case of retirement, disability or death where accelerated vesting provisions are defined within the awards agreement.

Compensation expense for time-based restricted stock is recognized ratably over the period of service, generally the entire vesting period, based on fair value on the date of grant. For grants made to directors, the fair value is determined by the closing price of the stock on the date of grant. The average of the high and low prices of the stock on the grant date is used for senior management. Compensation expense for performance-based restricted stock is recognized ratably over the remaining vesting period once the likelihood of meeting the performance measure is probable. During 2014, 2013 and 2012, we recognized compensation expense of $0.9 million, $0.6 million and $0.9 million and realized a tax benefit of $0.3 million, $0.2 million and $0.3 million related to restricted stock grants.

107

NOTE 20. INCENTIVE AND RESTRICTED STOCK PLAN AND DIVIDEND REINVESTMENT PLAN -- continued

The following table provides information about restricted stock granted under the 2003 Stock Plan for the years ended December 31:

	Restricted Stock	Weighted Average Grant Date Fair Value
Non-vested at December 31, 2012	115,019	$	22.39
Granted	22,189	19.18
Vested	45,864	19.68
Forfeited	11,929	21.30
Non-vested at December 31, 2013	79,415	$	21.50
Granted	—	—
Vested	41,740	20.70
Forfeited	14,530	20.97
Non-vested at December 31, 2014	23,145	$	23.28

The following table provides information about restricted stock granted under the 2014 Stock Plan for the years ended December 31:

	Restricted Stock	Weighted Average Grant Date Fair Value
Non-vested at December 31, 2013	—	$	—
Granted	80,455	23.24
Vested	158	23.19
Forfeited	473	23.19
Non-vested at December 31, 2014	79,824	$	23.24

As of December 31, 2014, there was $1.5 million of total unrecognized compensation cost related to restricted stock that will be recognized as compensation expense over a weighted average period of 1.97 years.

Dividend Reinvestment Plan

We also sponsor a Dividend Reinvestment and Stock Purchase Plan, or Dividend Plan, where shareholders may purchase shares of S&T common stock at the average fair value with reinvested dividends and voluntary cash contributions. The plan administrator and transfer agent may purchase shares directly from us from shares held in treasury or purchase shares in the open market to fulfill the Dividend Plan’s needs.

NOTE 21. PARENT COMPANY CONDENSED FINANCIAL INFORMATION

The following condensed financial statements summarize the financial position of S&T Bancorp, Inc. as of December 31, 2014 and 2013 and the results of its operations and cash flows for each of the three years ended December 31, 2014, 2013 and 2012.

108

NOTE 21. PARENT COMPANY CONDENSED FINANCIAL INFORMATION -- continued

BALANCE SHEETS

	December 31,
(dollars in thousands)	2014		2013
ASSETS
Cash	$	38,028	$	14,852
Investments in:
Bank subsidiary	565,927		553,825
Nonbank subsidiaries	20,569		19,561
Other assets	5,567		4,441
Total Assets	$	630,091	$	592,679
LIABILITIES
Long-term debt	$	20,619	$	20,619
Other liabilities	1,083		754
Total Liabilities	21,702		21,373
Total Shareholders’ Equity	608,389		571,306
Total Liabilities and Shareholders’ Equity	$	630,091	$	592,679

STATEMENTS OF NET INCOME

	Years ended December 31,
(dollars in thousands)	2014		2013			2012
Dividends from subsidiaries	$	46,414	$	24,087		$	35,603
Investment income	19		15			17
Interest expense on long-term debt	759		769			808
Other expenses	2,014		2,579			1,800
Income before Equity in Undistributed Net Income of Subsidiaries	43,660		20,754			33,012
Equity in undistributed net income (distribution in excess of net income) of:
Bank subsidiary	13,351		29,926			1,371
Nonbank subsidiaries	899		(141		)	(183		)
Net Income	$	57,910	$	50,539		34,200

109

NOTE 21. PARENT COMPANY CONDENSED FINANCIAL INFORMATION -- continued

STATEMENTS OF CASH FLOWS

	Years ended December 31,
(dollars in thousands)	2014			2013			2012
OPERATING ACTIVITIES
Net Income	$	57,910		$	50,539		$	34,200
Equity in undistributed (earnings) losses of subsidiaries	(14,250		)	(29,785		)	(1,188		)
Tax (benefit) expense from stock-based compensation	(16		)	(96		)	30
Other	(106		)	121			1,023
Net Cash Provided by Operating Activities	43,538			20,779			34,065
INVESTING ACTIVITIES
Net investments in subsidiaries	—			—			(5,035		)
Acquisitions	—			—			(14,123		)
Net Cash Used in Investing Activities	—			—			(19,158		)
FINANCING ACTIVITIES
(Purchase) Sale of treasury shares, net	(163		)	(88		)	998
Cash dividends paid to common shareholders	(20,215		)	(18,137		)	(17,357		)
Tax benefit (expense) from stock-based compensation	16			96			(30		)
Net Cash Used in Financing Activities	(20,362		)	(18,129		)	(16,389		)
Net increase (decrease) in cash	23,176			2,650			(1,482		)
Cash at beginning of year	14,852			12,202			13,684
Cash at End of Year	$	38,028		$	14,852		$	12,202

NOTE 22. REGULATORY MATTERS

We are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet the minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on our consolidated financial statements. Under capital guidelines and the regulatory framework for prompt corrective action, we must meet specific capital guidelines that involve quantitative measures of our assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. Our capital amounts and classification are also subject to qualitative judgments by the regulators about risk weightings and other factors.

The most recent notifications from the Federal Reserve and the FDIC categorized S&T and S&T Bank as well capitalized under the regulatory framework for corrective action. There have been no conditions or events that we believe have changed S&T or S&T Bank’s status during 2014 and 2013.

Tier 1 capital consists principally of shareholders’ equity, including preferred stock; excluding items recorded in accumulated other comprehensive income (loss), less goodwill and other intangibles. For regulatory purposes, trust preferred securities totaling $20.0 million, issued by an unconsolidated trust subsidiary of S&T underlying junior subordinated debt, are included in Tier 1 capital for S&T. Total capital consists of Tier 1 capital plus junior subordinated debt and the ALL subject to limitation. We currently have $25.0 million in junior subordinated debt which is included in Tier 2 capital for S&T in accordance with current regulatory reporting requirements.

Quantitative measures established by regulation to ensure capital adequacy require us to maintain minimum amounts and ratios of Total and Tier 1 capital to risk-weighted assets and Tier 1 capital to average assets. As of December 31, 2014 and 2013, we met all capital adequacy requirements to which we are subject.

110

NOTE 22. REGULATORY MATTERS -- continued

The following table summarizes risk-based capital amounts and ratios for S&T and S&T Bank.

	Actual				Minimum Regulatory Capital Requirements				To be Well Capitalized Under Prompt Corrective Action Provisions
(dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2014
Total Capital (to Risk-Weighted Assets)
S&T	$	537,935	14.27	%	$	301,548	8.00	%	$	376,936	10.00	%
S&T Bank	475,538		12.68	%	300,095		8.00	%	375,119		10.00	%
Tier 1 Capital (to Risk-Weighted Assets)
S&T	465,114		12.34	%	150,774		4.00	%	226,161		6.00	%
S&T Bank	403,593		10.76	%	150,048		4.00	%	225,071		6.00	%
Leverage Ratio(1)
S&T	465,114		9.80	%	189,895		4.00	%	237,369		5.00	%
S&T Bank	403,593		8.53	%	189,182		4.00	%	236,477		5.00	%
As of December 31, 2013
Total Capital (to Risk-Weighted Assets)
S&T	$	494,986	14.36	%	$	275,684	8.00	%	$	344,606	10.00	%
S&T Bank	457,540		13.35	%	274,257		8.00	%	342,821		10.00	%
Tier 1 Capital (to Risk-Weighted Assets)
S&T	426,234		12.37	%	137,842		4.00	%	206,763		6.00	%
S&T Bank	389,584		11.36	%	137,128		4.00	%	205,693		6.00	%
Leverage Ratio(1)
S&T	426,234		9.75	%	174,824		4.00	%	218,530		5.00	%
S&T Bank	389,584		8.95	%	174,081		4.00	%	217,601		5.00	%

(1) Minimum requirement is 3.00 percent for the most highly rated financial institutions.

NOTE 23. SEGMENTS

We operate three reportable operating segments: Community Banking, Insurance and Wealth Management.

• Our Community Banking segment offers services which include accepting time and demand deposits, originating commercial and consumer loans and providing letters of credit and credit card services.

• Our Insurance segment includes a full-service insurance agency offering commercial property and casualty insurance, group life and health coverage, employee benefit solutions and personal insurance lines.

• Our Wealth Management segment offers discount brokerage services, services as executor and trustee under wills and deeds, guardian and custodian of employee benefits and other trust and brokerage services, as well as a registered investment advisor that manages private investment accounts for individuals and institutions.

The following represents total assets by reportable operating segment as of December 31:

(dollars in thousands)	2014		2013
Community Banking	$	4,954,728	$	4,524,939
Insurance	7,468		6,926
Wealth Management	2,490		1,325
Total Assets	$	4,964,686	$	4,533,190

111

NOTE 23. SEGMENTS -- continued

The following tables provide financial information for our three segments. The financial results of the business segments include allocations for shared services based on an internal analysis that supports line of business and branch performance measurement. Shared services include expenses such as employee benefits, occupancy expense, computer support and other corporate overhead. Even with these allocations, the financial results are not necessarily indicative of the business segments’ financial condition and results of operations as if they existed as independent entities. The information provided under the caption “Eliminations” represents operations not considered to be reportable segments and/or general operating expenses and eliminations and adjustments, which are necessary for purposes of reconciling to the Consolidated Financial Statements.

	For the Year Ended December 31, 2014
(dollars in thousands)	Community Banking		Insurance		Wealth Management		Eliminations			Consolidated
Interest income	$	160,403	$	2	$	518	$	(400	)	$	160,523
Interest expense	13,989		—		—		(1,508		)	12,481
Net interest income	146,414		2		518		1,108			148,042
Provision for loan losses	1,715		—		—		—			1,715
Noninterest income	29,443		5,279		11,297		319			46,338
Noninterest expense	97,733		4,313		9,173		1,427			112,646
Depreciation expense	3,387		51		27		—			3,465
Amortization of intangible assets	1,039		51		39		—			1,129
Provision for income taxes	16,311		303		901		—			17,515
Net Income	$	55,672	$	563	$	1,675	$	—		$	57,910

	For the Year Ended December 31, 2013
(dollars in thousands)	Community Banking		Insurance			Wealth Management		Eliminations			Consolidated
Interest income	$	153,450	$	2		$	517	$	(213	)	$	153,756
Interest expense	16,508		—			—		(1,945		)	14,563
Net interest income	136,942		2			517		1,732			139,193
Provision for loan losses	8,311		—			—		—			8,311
Noninterest income	34,649		5,483			10,662		733			51,527
Noninterest expense	94,769		5,210			9,850		2,465			112,294
Depreciation expense	3,430		47			30		—			3,507
Amortization of intangible assets	1,492		51			48		—			1,591
Provision (benefit) for income taxes	14,180		(47		)	345		—			14,478
Net Income	$	49,409	$	224		$	906	$	—		$	50,539

	For the Year Ended December 31, 2012
(dollars in thousands)	Community Banking		Insurance			Wealth Management		Eliminations			Consolidated
Interest income	$	155,865	$	1		$	454	$	(69	)	$	156,251
Interest expense	22,135		—			—		(1,111		)	21,024
Net interest income	133,730		1			454		1,042			135,227
Provision for loan losses	22,815		—			—		—			22,815
Noninterest income	36,422		5,262			9,788		440			51,912
Noninterest expense	100,474		5,569			9,717		1,482			117,242
Depreciation expense	3,833		48			31		—			3,912
Amortization of intangible assets	1,600		52			57		—			1,709
Provision (benefit) for income taxes	7,420		(242		)	83		—			7,261
Net Income (Loss)	$	34,010	$	(164	)	$	354	$	—		$	34,200

112

NOTE 24. OTHER NONINTEREST EXPENSE

Other noninterest expense is presented in the table below:

	Years Ended December 31,
(dollars in thousands)	2014		2013		2012
Other noninterest expenses:
Joint venture amortization	$	4,054	$	4,095	$	4,199
Loan related expenses	2,579		2,432		2,538
Telecommunications	2,220		1,691		1,415
Amortization of intangibles	1,129		1,591		1,709
Other real estate owned	264		445		2,166
Other	11,224		10,661		12,815
Total Other Noninterest Expenses	$	21,470	$	20,915	$	24,842

NOTE 25. SELECTED FINANCIAL DATA

The following table presents selected financial data for the most recent eight quarters.

	2014									2013
(dollars in thousands, except per share data) (unaudited)	Fourth Quarter		Third Quarter		Second Quarter			First Quarter		Fourth Quarter		Third Quarter		Second Quarter		First Quarter
SUMMARY OF OPERATIONS
Interest income	$	41,381	$	40,605	$	39,872		$	38,665	$	38,779	$	38,581	$	38,553	$	37,843
Interest expense	3,315		3,076		3,017			3,074		3,125		3,307		3,957		4,174
Provision for loan losses	1,106		1,454		(1,134		)	289		1,562		3,419		1,023		2,307
Net interest income after provision for loan losses	36,960		36,075		37,989			35,302		34,092		31,855		33,573		31,362
Security gains, net	—		—		40			1		—		3		—		2
Noninterest income	11,220		11,931		11,731			11,415		11,312		12,539		12,867		14,804
Noninterest expense	29,720		28,440		30,165			28,914		29,447		27,943		28,386		31,616
Income before taxes	18,460		19,566		19,595			17,804		15,957		16,454		18,054		14,552
Provision for income taxes	3,963		4,906		4,875			3,771		4,098		4,207		3,951		2,222
Net Income Available to Common Shareholders	$	14,497	$	14,660	$	14,720		$	14,033	$	11,859	$	12,247	$	14,103	$	12,330
Per Share Data
Common earnings per share—diluted	$	0.49	$	0.49	$	0.49		$	0.47	$	0.40	$	0.41	$	0.47	$	0.41
Dividends declared per common share	0.18		0.17		0.17			0.16		0.16		0.15		0.15		0.15
Common book value	20.42		20.33		20.04			19.64		19.21		18.68		18.39		18.32

NOTE 26. SALE OF MERCHANT CARD SERVICING BUSINESS

We sold our existing merchant card servicing business for $4.8 million during the first quarter of 2013. Consequently, we terminated an agreement with our existing merchant processor and incurred a termination fee of $1.7 million. As a result of this transaction, we recognized a gain of $3.1 million in the first quarter of 2013. In conjunction with the sale of the merchant card servicing business, we entered into a marketing and sales alliance agreement with the purchaser for an initial term of ten years. The agreement provides that we will actively market and refer our customers to the purchaser and in return will receive a share of the future revenue. Future revenue is dependent on the number of referrals, number of new merchant accounts and volume of activity.

113

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Shareholders

S&T Bancorp, Inc. and subsidiaries:

We have audited S&T Bancorp, Inc. and subsidiaries’ (the Company) internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control—IntegratedFramework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control—Integrated Framework(2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of the Company as of December 31, 2014 and 2013, and the related consolidated statements of net income, comprehensive income, changes in shareholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2014, and our report dated February 20, 2015 expressed an unqualified opinion on those consolidated financial statements.

/s/ KPMG LLP

Pittsburgh, Pennsylvania

February 20, 2015

114

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Shareholders

S&T Bancorp, Inc. and subsidiaries:

We have audited the accompanying consolidated balance sheets of S&T Bancorp, Inc. and subsidiaries as of December 31, 2014 and 2013, and the related consolidated statements of net income, comprehensive income, changes in shareholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2014. These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of S&T Bancorp, Inc. and subsidiaries as of December 31, 2014 and 2013, and the results of its operations and its cash flows for each of the years in the three-year period ended December 31, 2014, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the Company’s internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control—Integrated Framework(2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), and our report dated February 20, 2015 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

/s/ KPMG LLP

Pittsburgh, Pennsylvania

February 20, 2015

115

Item 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURES

None

Item 9A.  CONTROLS AND PROCEDURES

a) Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of S&T’s Chief Executive Officer, or CEO, and Chief Financial Officer, or CFO (its principal executive officer and principal financial officer), management has evaluated the effectiveness of the design and operation of S&T’s disclosure controls and procedures as of December 31, 2014. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives.

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934, as amended, or the Exchange Act, is recorded, processed, summarized and reported within the time periods required by the Securities and Exchange Commission, or the SEC, and that such information is accumulated and communicated to S&T’s management, including our CEO and CFO, as appropriate, to allow timely decisions regarding required disclosure.

Based on and as of the date of such evaluation, our CEO and CFO concluded that the design and operation of our disclosure controls and procedures were effective in all material respects, as of the end of the period covered by this Report.

b) Management’s Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f). Management assessed S&T’s system of internal control over financial reporting as of December 31, 2014, in relation to criteria for effective internal control over financial reporting as described in “Internal Control Integrated Framework (2013),” issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in 2013. Based on this assessment, management concludes that, as of December 31, 2014, S&T’s system of internal control over financial reporting is effective and meets the criteria of the “Internal Control Integrated Framework (2013).”

KPMG LLP, independent registered public accounting firm, has issued a report on the effectiveness of S&T’s internal control over financial reporting as of December 31, 2014, which is included herein.

c) Changes in Internal Control Over Financial Reporting

On May 14, 2013, COSO issued an updated version of its Internal Control - Integrated Framework, referred to as the 2013 COSO Framework and has indicated that after December 15, 2014, the 1992 Framework will be considered superseded. Our management’s assessment of the overall effectiveness of our internal controls over financial reporting for the year ending December 31, 2014 was based on the 2013 COSO Framework. The change from the 1992 Framework to the 2013 COSO Framework was not significant to our overall control structure over financial reporting.

No changes were made to S&T’s internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the last fiscal quarter that materially affected, or are reasonably likely to materially affect, S&T’s internal control over financial reporting.

Item 9B.  OTHER INFORMATION

Not applicable

116

PART III

Item 10.  DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by Part III, Item 10 of Form 10-K is incorporated herein from the sections entitled “Section 16(a) Beneficial Ownership Reporting Compliance”, “Election of Directors”, “Executive Officers of the Registrant” and “Corporate Governance and Board and Committee Meetings” in our proxy statement relating to our May 20, 2015 annual meeting of shareholders.

Item 11.  EXECUTIVE COMPENSATION

This information required by Part III, Item 11 of Form 10-K is incorporated herein from the sections entitled “Compensation Discussion and Analysis;” “Executive Compensation;” “Director Compensation;” “Compensation Committee Interlocks and Insider Participation”; and “Compensation Committee Report” in our proxy statement relating to our May 20, 2015 annual meeting of shareholders.

Item 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

Except as set forth below, the information required by Part III, Item 12 of Form 10-K is incorporated from the sections entitled “Principal Beneficial Owners of S&T Common Stock” and “Beneficial Ownership of S&T Common Stock by Directors and Officers” in our proxy statement relating to our May 20, 2015 annual meeting of shareholders.

EQUITY COMPENSATION PLAN INFORMATION UPDATE

The following table provides information as of December 31, 2014 related to the equity compensation plans in effect at that time.

	(a)	(b)		(c)
Plan category	Number of securities to be issued upon exercise of outstanding options, warrants and rights	Weighted average exercise price of outstanding options, warrants and rights		Number of securities remaining available for future issuance under equity compensation plan (excluding securities reflected in column (a))
Equity compensation plan approved by shareholders(1)	155,500	$	37.855	669,545
Equity compensation plans not approved by shareholders	—	—		—
Total	155,500	$	37.855	669,545

(1) Awards granted under the 2003 and 2014 Incentive Stock Plans.

Item 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by Part III, Item 13 of Form 10-K is incorporated herein from the sections entitled “Related Person Transactions” and “Director Independence” in our proxy statement relating to our May 20, 2015 annual meeting of shareholders.

Item 14.  PRINCIPAL ACCOUNTING FEES AND SERVICES

The information required by Part III, Item 14 of Form 10-K is incorporated herein from the section entitled “Independent Registered Public Accounting Firm” in our proxy statement relating to our May 20, 2015 annual meeting of shareholders.

117

PART IV

Item 15.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a) The following documents are filed as part of this Report.

Consolidated Financial Statements: The following consolidated financial statements are included in Part II, Item 8 of this Report. No financial statement schedules are being filed because the required information is inapplicable or is presented in the Consolidated Financial Statements or related notes.

Consolidated Balance Sheets	72
Consolidated Statements of Net Income	73
Consolidated Statements of Comprehensive Income	74
Consolidated Statements of Changes in Shareholders’ Equity	75
Consolidated Statements of Cash Flows	76
Notes to Consolidated Financial Statements	77
Report of KPMG LLP, Independent Registered Public Accounting Firm, on Effectiveness of Internal Control Over Financial Reporting	139
Report of KPMG LLP, Independent Registered Public Accounting Firm, on Consolidated Financial Statements	140

118

(b)    Exhibits
2.1	Agreement and Plan of Merger, dated as of October 29, 2014, between S&T Bancorp, Inc. and Integrity Bancshares, Inc. Filed as Exhibit 2.1 to S&T Bancorp, Inc. Current Report on Form 8-K filed on October 30, 2014 and incorporated herein by reference.
3.1	Articles of Incorporation of S&T Bancorp, Inc. Filed as Exhibit B to Registration Statement (No. 2-83565) on Form S-4 of S&T Bancorp, Inc., dated May 5, 1983, and incorporated herein by reference.
3.2	Amendment to Articles of Incorporation of S&T Bancorp, Inc. Filed as Exhibit 3.2 to Form S-4 Registration Statement (No. 33-02600) dated January 15, 1986, and incorporated herein by reference.
3.3	Amendment to Articles of Incorporation of S&T Bancorp, Inc. effective May 8, 1989, incorporated herein by reference. Filed as exhibit 3.3 to S&T Bancorp, Inc. Annual Report on Form 10-K for year ending December 31, 1998 and incorporated herein by reference.
3.4	Amendment to Articles of Incorporation of S&T Bancorp, Inc. effective July 21, 1995. Filed as exhibit 3.4 to S&T Bancorp, Inc. Annual Report on Form 10-K for year ending December 31, 1998 and incorporated herein by reference.
3.5	Amendment to Articles of Incorporation of S&T Bancorp, Inc. effective June 18, 1998. Filed as exhibit 3.5 to S&T Bancorp, Inc. Annual Report on Form 10-K for year ending December 31, 1998 and incorporated herein by reference.
3.6	Amendment to Articles of Incorporation of S&T Bancorp, Inc. effective April 21, 2008. Filed as Exhibit 3.1 to S&T Bancorp, Inc. Quarterly Report on Form 10-Q filed on August 7, 2008 and incorporated herein by reference.
3.7	Certificate of Designations for the Series A Preferred Stock. Filed as Exhibit 3.1 to S&T Bancorp, Inc. Current Report on Form 8-K filed on January 15, 2009 and incorporated herein by reference.
3.8	By-laws of S&T Bancorp, Inc. Filed as Exhibit 3.1 to S&T Bancorp, Inc. Current Report on Form 8-K filed on March 27, 2014 and incorporated herein by reference.
10.2	S&T Bancorp, Inc. 2003 Incentive Stock Plan. Filed as Exhibit 4.2 to Form S-8 Registration Statement (No. 333-111557) dated December 24, 2003 and incorporated herein by reference.*
10.3	S&T Bancorp, Inc. Thrift Plan for Employees of S&T Bank, as amended and restated. Filed as Exhibit 4.2 to Form S-8 Registration Statement (No. 333-156541) dated December 31, 2008 and incorporated herein by reference.*
10.4	Dividend Reinvestment and Stock Purchase Plan of S&T Bancorp, Inc. Filed as Exhibit 4.2 to Form S-3 Registration Statement (No. 333-156555) dated January 2, 2009 and incorporated herein by reference. Filed as Exhibit 4.2 to S&T Bancorp, Inc. on Form S-8 filed on January 2, 2009 and incorporated herein by reference.*
10.5	Severance Agreement, by and between Todd D. Brice and S&T Bancorp, Inc., dated December 31, 2008. Filed as Exhibit 10.1 to S&T Bancorp, Inc. Current Report on Form 8-K filed on January 2, 2009 and incorporated herein by reference.*
10.6	Severance Agreement, by and between David G. Antolik and S&T Bancorp, Inc. dated December 31, 2008. Filed as Exhibit 10.4 to S&T Bancorp, Inc. Current Report on Form 8-K filed on January 2, 2009 and incorporated herein by reference.*
10.7	Severance Agreement, by and between Mark Kochvar and S&T Bancorp, Inc. dated as of January 1, 2009. Filed as Exhibit 10.1 to S&T Bancorp, Inc. Current Report on Form 8-K filed on February 26, 2010 and incorporated herein by reference.*
10.8	Severance Agreement, by and between David Ruddock and S&T Bancorp, Inc. dated as of January 1, 2009.*
10.9	S&T Bancorp, Inc. 2014 Incentive Plan. Filed as Exhibit 10.9 to the Annual Report on Form 10-K for the year ended December 31, 2013 dated February 21, 2014, and incorporated herein by reference. *
21	Subsidiaries of the Registrant.
23	Consent of KPMG LLP, Independent Registered Public Accounting Firm.
24	Power of Attorney.
31.1	Rule 13a-14(a) Certification of the Chief Executive Officer.

119

(b)    Exhibits
31.2	Rule 13a-14(a) Certification of the Principal Financial Officer.
32	Rule 13a-14(b) Certification of the Chief Executive Officer and Principal Financial Officer.
101	The following financial information from the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2014 is formatted in eXtensible Business Reporting Language (XBRL): (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Net Income, (iii) Consolidated Statements of Comprehensive Income, (iv) Consolidated Statements of Changes in Shareholders’ Equity, (v) Consolidated Statements of Cash Flows and (vi) Notes to Consolidated Financial Statements.

*    Management Contract or Compensatory Plan or Arrangement

120

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

S&T BANCORP, INC. (Registrant)
	2/20/2015
Todd D. Brice President and Chief Executive Officer (Principal Executive Officer)	Date
	2/20/2015
Mark Kochvar Senior Executive Vice President, Chief Financial Officer (Principal Financial Officer)	Date

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

SIGNATURE	TITLE	DATE
Todd D. Brice	President and Chief Executive Officer (Principal Executive Officer)	2/20/2015
Mark Kochvar	Senior Executive Vice President and Chief Financial Officer (Principal Financial Officer)	2/20/2015
/s/ Melanie Lazzari	Senior Vice President, Controller	2/20/2015
Melanie Lazzari
	Director	2/20/2015
John J. Delaney
	Director	2/20/2015
Michael J. Donnelly
/s/ William J. Gatti	Director	2/20/2015
William J. Gatti
/s/ Jeffrey D. Grube	Director	2/20/2015
Jeffrey D. Grube

121

SIGNATURE	TITLE	DATE
/s/ Frank W. Jones	Director	2/20/2015
Frank W. Jones
/s/ Joseph A. Kirk	Director	2/20/2015
Joseph A. Kirk
/s/ David L. Krieger	Director	2/20/2015
David L. Krieger
	Director	2/20/2015
James C. Miller
/s/ Fred J. Morelli Jr	Director	2/20/2015
Fred J. Morelli, Jr.
/s/ Frank J. Palermo Jr.	Director	2/20/2015
Frank J. Palermo, Jr.
	Director	2/20/2015
Christine J. Toretti
	Chairman of the Board and Director	2/20/2015
Charles G. Urtin
*By: /s/ Joseph A. Kirk	Director	2/20/2015
Joseph A. Kirk Attorney-in-fact

122

EX-21

Exhibit 21

SUBSIDIARIES OF THE REGISTRANT

S&T Bancorp, Inc., a Pennsylvania corporation, is a financial holding company. The table below sets forth all of our subsidiaries as to state or jurisdiction of organization.

Subsidiary	State or Jurisdiction of Organization
S&T Bank	Pennsylvania
9th Street Holdings, Inc.	Delaware
S&T Bancholdings, Inc.	Delaware
S&T Insurance Group, LLC	Pennsylvania
S&T Professional Resources Group, LLC	Pennsylvania
S&T-Evergreen Insurance, LLC	Pennsylvania
S&T Settlement Services, LLC	Pennsylvania
Stewart Capital Advisors, LLC	Pennsylvania
STBA Capital Trust I	Delaware
Commonwealth Trust Credit Life Insurance Company	Arizona

EX-23

Exhibit 23

Consent of Independent Registered Public Accounting Firm

The Board of Directors

S&T Bancorp, Inc. and subsidiaries:

We consent to the incorporation by reference in the registration statement Nos. 333-183978, 333-161444, 333-157297 and 333-156555, on Form S-3, and No. 333-156541 on Form S-8 of S&T Bancorp, Inc. and subsidiaries of our reports dated February 20, 2015, with respect to the consolidated balance sheets of S&T Bancorp, Inc. and subsidiaries as of December 31, 2014 and 2013, and the related consolidated statements of net income, comprehensive income and changes in shareholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2014, and the effectiveness of internal control over financial reporting as of December 31, 2014, which reports appear in the December 31, 2014 annual report on Form 10-K of S&T Bancorp, Inc. and subsidiaries.

/s/ KPMG LLP

Pittsburgh, Pennsylvania

February 20, 2015

EX-24

Exhibit 24

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below (each, a “Signatory”) constitutes and appoints Joseph A. Kirk, Jeffrey D. Grube and Frank W. Jones (each an “Agent,” and collectively, “Agents”) or any of them, his true and lawful attorney-in-fact and agent for and in his name, place and stead, in any and all capacities, to sign the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 and to file the same, with all exhibits thereto, and all amendments or other documents in connection therewith, with the Securities and Exchange Commission. Each Signatory further grants to the Agent full power and authority to do and perform each and every act and thing requisite and necessary, in the judgment of such Agent, to be done in connection with any such signing and filing, as full to all intents and purposes as he might or could do in person, and hereby ratifies and confirms all that said Agent may lawfully do or cause to be done by virtue hereof.

This Power of Attorney may be executed simultaneously in one or more counterparts, each of which shall be deemed an original, but all of which constitute but one and the same instrument.

Signature	Title	Date
	Chairman of the Board and Director	February 20, 2015
Charles G. Urtin
/s/ Todd D. Brice	Chief Executive Officer and Director	February 20, 2015
Todd D. Brice
	Director
John J. Delaney		February 20, 2015
	Director	February 20, 2015
Michael J. Donnelly
/s/ William J. Gatti	Director	February 20, 2015
William J. Gatti
/s/ Jeffrey D. Grube	Director	February 20, 2015
Jeffrey D. Grube
/s/ Frank W. Jones	Director	February 20, 2015
Frank W. Jones
/s/ Joseph A. Kirk	Director	February 20, 2015
Joseph A. Kirk
/s/ David L. Krieger	Director	February 20, 2015
David L. Krieger

Signature	Title	Date
James C. Miller	Director	February 20, 2015
/s/ Fred J. Morelli Jr.	Director	February 20, 2015
Fred J. Morelli, Jr.
/s/ Frank J. Palermo, Jr.	Director	February 20, 2015
Frank J. Palermo, Jr.
	Director	February 20, 2015
Christine J. Toretti

EX-31.1

Exhibit 31.1

Certification of Principal Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Todd D. Brice, certify that:

1. I have reviewed this Annual Report on Form 10-K of S&T Bancorp, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report), that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 20, 2015

/s/ Todd D. Brice

Todd D. Brice, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification of Principal Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Mark Kochvar, certify that:

1. I have reviewed this Annual Report on Form 10-K of S&T Bancorp, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report), that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 20, 2015

/s/ Mark Kochvar

Mark Kochvar, Senior Executive Vice President, Chief Financial Officer

EX-32

Exhibit 32

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

AND CHIEF FINANCIAL OFFICER

SARBANES-OXLEY ACT SECTION 906

Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, in connection with the S&T Bancorp, Inc. (the “Company”) Annual Report on Form 10-K for the period ending December 31, 2014 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Todd D. Brice, President and Chief Executive Officer of the Company, and I, Mark Kochvar, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company for the dates and period covered by the report.

This certificate is being made for the exclusive purpose of compliance by the Chief Executive Officer and Chief Financial Officer of the Company with the requirements of Section 906 of the Sarbanes-Oxley Act of 2002, and may not be disclosed, distributed or used by any person or for any reason other than as specifically required by law.

Date: February 20, 2015
/s/ Todd D. Brice	/s/ Mark Kochvar
Todd D. Brice,	Mark Kochvar,
President and Chief Executive Officer	Senior Executive Vice President, Chief Financial Officer

XML

Securities Available-for-Sale (Tables)

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Composition of Securities Available-for-Sale

The following tables present the amortized cost and fair value of available-for-sale securities as of the dates presented:

	December 31, 2014									December 31, 2013
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Treasury securities	$	14,873	$	7	$	—		$	14,880	$	—	$	—	$	—		$	—
Obligations of U.S. government corporations and agencies	268,029		2,334		(1,078		)	269,285		235,181		2,151		(2,581		)	234,751
Collateralized mortgage obligations of U.S. government corporations and agencies	116,897		1,257		(148		)	118,006		63,776		601		(603		)	63,774
Residential mortgage-backed securities of U.S. government corporations and agencies	45,274		1,548		(154		)	46,668		47,934		1,420		(685		)	48,669
Commercial mortgage-backed securities of U.S. government corporations and agencies	39,834		232		(393		)	39,673		40,357		—		(1,305		)	39,052
Obligations of states and political subdivisions	136,977		5,789		(64		)	142,702		115,572		1,294		(2,602		)	114,264
Debt Securities	621,884		11,167		(1,837		)	631,214		502,820		5,466		(7,776		)	500,510
Marketable equity securities	7,579		1,480		—			9,059		7,579		1,336		—			8,915
Total	$	629,463	$	12,647	$	(1,837	)	$	640,273	$	510,399	$	6,802	$	(7,776	)	$	509,425

Schedule of Gross and Net Realized Gains and Losses on Sale of Securities

The following table shows the composition of gross and net realized gains and losses for the periods presented:

	Years ended December 31,
(dollars in thousands)	2014		2013		2012
Gross realized gains	$	41	$	5	$	3,027
Gross realized losses	—		—		(11		)
Net Realized Gains	$	41	$	5	$	3,016

Fair Value and Age of Gross Unrealized Losses by Investment Category

The following tables present the fair value and the age of gross unrealized losses by investment category as of the dates presented:

	December 31, 2014
	Less Than 12 Months						12 Months or More							Total
(dollars in thousands)	Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses
Obligations of U.S. government corporations and agencies	4	$	39,745	$	(207	)	8	$	63,149	$	(871	)	12	$	102,894	$	(1,078	)
Collateralized mortgage obligations of U.S. government corporations and agencies	1	9,323		(148		)	—	—		—			1	9,323		(148		)
Residential mortgage-backed securities of U.S. government corporations and agencies	—	—		—			1	8,982		(154		)	1	8,982		(154		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	1	9,998		(25		)	2	20,640		(368		)	3	30,638		(393		)
Obligations of states and political subdivisions	1	263		(1		)	2	10,756		(63		)	3	11,019		(64		)
Total Temporarily Impaired Securities	7	$	59,329	$	(381	)	13	$	103,527	$	(1,456	)	20	$	162,856	$	(1,837	)

	December 31, 2013
	Less Than 12 Months						12 Months or More							Total
(dollars in thousands)	Number of Securities	Fair  Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses
Obligations of U.S. government corporations and agencies	16	$	126,017	$	(2,581	)	—	$	—	$	—		16	$	126,017	$	(2,581	)
Collateralized mortgage obligations of U.S. government corporations and agencies	3	39,522		(603		)	—	—		—			3	39,522		(603		)
Residential mortgage-backed securities of U.S. government corporations and agencies	2	22,822		(685		)	—	—		—			2	22,822		(685		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	4	39,052		(1,305		)	—	—		—			4	39,052		(1,305		)
Obligations of states and political subdivisions	16	47,529		(1,739		)	2	10,088		(863		)	18	57,617		(2,602		)
Total Temporarily Impaired Securities	41	$	274,942	$	(6,913	)	2	$	10,088	$	(863	)	43	$	285,030	$	(7,776	)

Unrealized Gain (Loss) on Investments

The following table displays net unrealized gains and losses, net of tax on securities available for sale included in accumulated other comprehensive income/(loss) for the periods presented:

	December 31, 2014							December 31, 2013
(dollars in thousands)	Gross Unrealized Gains		Gross Unrealized Losses			Net Unrealized Gains/(Losses)		Gross Unrealized Gains		Gross Unrealized Losses			Net Unrealized Gains/(Losses)
Total unrealized gains/(losses) on securities available for sale	$	12,647	$	(1,837	)	$	10,810	$	6,802	$	(7,776	)	$	(974	)
Income tax expense/(benefit)	4,426		(643		)	3,783		2,381		(2,722		)	(341		)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	$	8,221	$	(1,194	)	$	7,027	$	4,421	$	(5,054	)	$	(633	)

Amortized Cost and Fair Value of Available-for-Sale Securities

The amortized cost and fair value of securities available-for-sale at December 31, 2014 by contractual maturity are included in the table below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

	December 31, 2014
(dollars in thousands)	Amortized Cost		Fair Value
Due in one year or less	$	21,137	$	21,339
Due after one year through five years	196,589		197,183
Due after five years through ten years	101,013		102,788
Due after ten years	101,140		105,557
	419,879		426,867
Collateralized mortgage obligations of U.S. government corporations and agencies	116,897		118,006
Residential mortgage-backed securities of U.S. government corporations and agencies	45,274		46,668
Commercial mortgage-backed securities of U.S. government corporations and agencies	39,834		39,673
Debt Securities	621,884		631,214
Marketable equity securities	7,579		9,059
Total	$	629,463	$	640,273

XML

Commitments and Contingencies - Future Estimated Payments Related to Data Processing and Communication Charges (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
2015	$ 11,326
2016	10,715
2017	11,057
2018	11,411
2019	11,777
Total	$ 56,286

XML

Parent Company Condensed Financial Information (Tables)

12 Months Ended

Dec. 31, 2014

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Balance Sheets

BALANCE SHEETS

	December 31,
(dollars in thousands)	2014		2013
ASSETS
Cash	$	38,028	$	14,852
Investments in:
Bank subsidiary	565,927		553,825
Nonbank subsidiaries	20,569		19,561
Other assets	5,567		4,441
Total Assets	$	630,091	$	592,679
LIABILITIES
Long-term debt	$	20,619	$	20,619
Other liabilities	1,083		754
Total Liabilities	21,702		21,373
Total Shareholders’ Equity	608,389		571,306
Total Liabilities and Shareholders’ Equity	$	630,091	$	592,679

Statements of Net Income

STATEMENTS OF NET INCOME

	Years ended December 31,
(dollars in thousands)	2014		2013			2012
Dividends from subsidiaries	$	46,414	$	24,087		$	35,603
Investment income	19		15			17
Interest expense on long-term debt	759		769			808
Other expenses	2,014		2,579			1,800
Income before Equity in Undistributed Net Income of Subsidiaries	43,660		20,754			33,012
Equity in undistributed net income (distribution in excess of net income) of:
Bank subsidiary	13,351		29,926			1,371
Nonbank subsidiaries	899		(141		)	(183		)
Net Income	$	57,910	$	50,539		34,200

Statements of Cash Flows

STATEMENTS OF CASH FLOWS

	Years ended December 31,
(dollars in thousands)	2014			2013			2012
OPERATING ACTIVITIES
Net Income	$	57,910		$	50,539		$	34,200
Equity in undistributed (earnings) losses of subsidiaries	(14,250		)	(29,785		)	(1,188		)
Tax (benefit) expense from stock-based compensation	(16		)	(96		)	30
Other	(106		)	121			1,023
Net Cash Provided by Operating Activities	43,538			20,779			34,065
INVESTING ACTIVITIES
Net investments in subsidiaries	—			—			(5,035		)
Acquisitions	—			—			(14,123		)
Net Cash Used in Investing Activities	—			—			(19,158		)
FINANCING ACTIVITIES
(Purchase) Sale of treasury shares, net	(163		)	(88		)	998
Cash dividends paid to common shareholders	(20,215		)	(18,137		)	(17,357		)
Tax benefit (expense) from stock-based compensation	16			96			(30		)
Net Cash Used in Financing Activities	(20,362		)	(18,129		)	(16,389		)
Net increase (decrease) in cash	23,176			2,650			(1,482		)
Cash at beginning of year	14,852			12,202			13,684
Cash at End of Year	$	38,028		$	14,852		$	12,202

XML

Long-Term Borrowings and Subordinated Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Long-Term Borrowings, Interest Expense and Weighted Average Interest Rate

The following table represents the balance of long-term borrowings, the weighted average interest rate as of December 31 and interest expense for the years ended December 31:

(dollars in thousand)	2014			2013			2012
Long-term borrowings	$	19,442		$	21,810		$	34,101
Weighted average interest rate	3.00		%	3.01		%	3.17		%
Interest expense	$	617		$	746		$	1,107

Schedule of Annual Maturities and Average Interest Rate of Long-Term Debt

Scheduled annual maturities and average interest rates for all of our long-term debt, including a capital lease of $0.2 million, for each of the five years and thereafter subsequent to December 31, 2014 are as follows:

(dollars in thousands)	Balance		Average Rate
2015	$	2,399	3.41	%
2016	2,330		3.44	%
2017	2,412		3.53	%
2018	2,496		3.67	%
2019	2,514		3.13	%
Thereafter	7,291		2.20	%
Total	$	19,442	2.97	%

Schedule of Junior Subordinated Debt Securities and Interest Expense

The following table represents the composition of junior subordinated debt securities at December 31 and the interest expense for the years ended December 31:

	2014				2013				2012
(dollars in thousands)	Balance		Interest Expense		Balance		Interest Expense		Balance		Interest Expense
2006 Junior subordinated debt	$	25,000	$	463	$	25,000	$	475	$	25,000	$	523
2008 Junior subordinated debt—trust preferred securities	20,619		759		20,619		770		20,619		808
2008 Junior subordinated debt	—		—		—		422		20,000		818
2008 Junior subordinated debt	—		—		—		403		25,000		766
Total	$	45,619	$	1,222	$	45,619	$	2,070	$	90,619	$	2,915

Schedule of Junior Subordinated Debt Securities

The following table summarizes the key terms of our junior subordinated debt securities:

(dollars in thousands)	2006 Junior Subordinated Debt	2008 Trust Preferred Securities	2008 Junior Subordinated Debt	2008 Junior Subordinated Debt
Junior Subordinated Debt	$25,000	—	$20,000	$25,000
Trust Preferred Securities	—	$20,619	—	—
Stated Maturity Date	12/15/2036	3/15/2038	6/15/2018	5/30/2018
Optional redemption date at par	Any time after 9/15/2011	Any time after 3/15/2013	Any time after 6/15/2013	Any time after 5/30/2013
Regulatory Capital	Tier 2	Tier 1	Tier 2	Tier 2
Interest Rate	3 month LIBOR plus 160 bps	3 month LIBOR plus 350 bps	3 month LIBOR plus 350 bps	3 month LIBOR plus 250 bps
Interest Rate at December 31, 2014	1.84%	3.74%	—%	—%

XML

Employee Benefits - Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Prior service credit	$ (1,167)	$ (1,304)
Net actuarial loss	30,726	18,373
Total (Before Tax Effects)	$ 29,559	$ 17,069

XML

Securities Available-for-Sale - Schedule of Gross and Net Realized Gains and Losses on Sale of Securities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 41	$ 5	$ 3,027
Gross realized losses	0	0	(11)
Net Realized Gains	$ 41	$ 5	$ 3,016

XML

Employee Benefits - Actuarial Weighted Average Assumptions Used in Determining Net Periodic Pension Cost (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Discount rate	4.75%	4.00%	4.75%
Rate of compensation increase	3.00%	3.00%	4.00%
Expected return on assets	8.00%	8.00%	8.00%

XML

Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Summary of Risk-Based Capital Amounts and Ratios for S&T and S&T Bank

The following table summarizes risk-based capital amounts and ratios for S&T and S&T Bank.

	Actual				Minimum Regulatory Capital Requirements				To be Well Capitalized Under Prompt Corrective Action Provisions
(dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2014
Total Capital (to Risk-Weighted Assets)
S&T	$	537,935	14.27	%	$	301,548	8.00	%	$	376,936	10.00	%
S&T Bank	475,538		12.68	%	300,095		8.00	%	375,119		10.00	%
Tier 1 Capital (to Risk-Weighted Assets)
S&T	465,114		12.34	%	150,774		4.00	%	226,161		6.00	%
S&T Bank	403,593		10.76	%	150,048		4.00	%	225,071		6.00	%
Leverage Ratio(1)
S&T	465,114		9.80	%	189,895		4.00	%	237,369		5.00	%
S&T Bank	403,593		8.53	%	189,182		4.00	%	236,477		5.00	%
As of December 31, 2013
Total Capital (to Risk-Weighted Assets)
S&T	$	494,986	14.36	%	$	275,684	8.00	%	$	344,606	10.00	%
S&T Bank	457,540		13.35	%	274,257		8.00	%	342,821		10.00	%
Tier 1 Capital (to Risk-Weighted Assets)
S&T	426,234		12.37	%	137,842		4.00	%	206,763		6.00	%
S&T Bank	389,584		11.36	%	137,128		4.00	%	205,693		6.00	%
Leverage Ratio(1)
S&T	426,234		9.75	%	174,824		4.00	%	218,530		5.00	%
S&T Bank	389,584		8.95	%	174,081		4.00	%	217,601		5.00	%

(1) Minimum requirement is 3.00 percent for the most highly rated financial institutions.

XML

Loans and Loans Held for Sale - Restructured Loans for Periods Stated (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 SecurityLoan	Dec. 31, 2013 SecurityLoan
Financing Receivable, Modifications [Line Items]
Financing Receivable, Decrease, Forgiveness		$ 100,000
Number of Loans	44	71
Pre-Modification Outstanding Recorded Investment	4,949,000	11,779,000
Post-Modification Outstanding Recorded Investment	4,777,000	11,018,000
Total Difference in Recorded Investment	172,000	(761,000)
Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	6	9
Pre-Modification Outstanding Recorded Investment	2,372,000	3,769,000
Post-Modification Outstanding Recorded Investment	2,321,000	3,298,000
Total Difference in Recorded Investment	51,000	(471,000)
Interest Rate Reduction and Maturity Date Extension [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	2	2
Pre-Modification Outstanding Recorded Investment	96,000	664,000
Post-Modification Outstanding Recorded Investment	95,000	636,000
Total Difference in Recorded Investment	1,000	(28,000)
Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		4,339,000
Post-Modification Outstanding Recorded Investment		4,216,000
Total Difference in Recorded Investment		(123,000)
Chapter 7 Bankruptcy [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	29	56
Pre-Modification Outstanding Recorded Investment	1,113,000	1,983,000
Post-Modification Outstanding Recorded Investment	1,039,000	1,856,000
Total Difference in Recorded Investment	74,000	(127,000)
Maturity Date Extension [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	7	2
Pre-Modification Outstanding Recorded Investment	1,368,000	970,000
Post-Modification Outstanding Recorded Investment	1,322,000	958,000
Total Difference in Recorded Investment	46,000	(12,000)
Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		54,000
Post-Modification Outstanding Recorded Investment		54,000
Total Difference in Recorded Investment		0
Commercial Real Estate [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	4	4
Pre-Modification Outstanding Recorded Investment	1,991,000	2,772,000
Post-Modification Outstanding Recorded Investment	1,965,000	2,494,000
Total Difference in Recorded Investment	26,000	(278,000)
Commercial Real Estate [Member] | Interest Rate Reduction and Maturity Date Extension [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		2
Pre-Modification Outstanding Recorded Investment		664,000
Post-Modification Outstanding Recorded Investment		636,000
Total Difference in Recorded Investment		(28,000)
Commercial Real Estate [Member] | Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		4,339,000
Post-Modification Outstanding Recorded Investment		4,216,000
Total Difference in Recorded Investment		(123,000)
Commercial Real Estate [Member] | Chapter 7 Bankruptcy [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		6
Pre-Modification Outstanding Recorded Investment		227,000
Post-Modification Outstanding Recorded Investment		190,000
Total Difference in Recorded Investment		(37,000)
Commercial Real Estate [Member] | Maturity Date Extension [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		219,000
Post-Modification Outstanding Recorded Investment		219,000
Total Difference in Recorded Investment		0
Commercial and Industrial [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	2	2
Pre-Modification Outstanding Recorded Investment	381,000	670,000
Post-Modification Outstanding Recorded Investment	356,000	638,000
Total Difference in Recorded Investment	25,000	(32,000)
Commercial and Industrial [Member] | Chapter 7 Bankruptcy [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		3,000
Post-Modification Outstanding Recorded Investment		1,000
Total Difference in Recorded Investment		(2,000)
Commercial and Industrial [Member] | Maturity Date Extension [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		751,000
Post-Modification Outstanding Recorded Investment		739,000
Total Difference in Recorded Investment		(12,000)
Commercial Construction [Member] | Maturity Date Extension [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	1
Pre-Modification Outstanding Recorded Investment	1,019,000
Post-Modification Outstanding Recorded Investment	974,000
Total Difference in Recorded Investment	45,000
Residential Mortgage [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		2
Pre-Modification Outstanding Recorded Investment		153,000
Post-Modification Outstanding Recorded Investment		149,000
Total Difference in Recorded Investment		(4,000)
Residential Mortgage [Member] | Chapter 7 Bankruptcy [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	9	8
Pre-Modification Outstanding Recorded Investment	651,000	617,000
Post-Modification Outstanding Recorded Investment	634,000	592,000
Total Difference in Recorded Investment	17,000	(25,000)
Residential Mortgage [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		54,000
Post-Modification Outstanding Recorded Investment		54,000
Home Equity [Member] | Principal Deferral [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		174,000
Post-Modification Outstanding Recorded Investment		17,000
Total Difference in Recorded Investment		(157,000)
Home Equity [Member] | Interest Rate Reduction and Maturity Date Extension [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	2
Pre-Modification Outstanding Recorded Investment	96,000
Post-Modification Outstanding Recorded Investment	95,000
Total Difference in Recorded Investment	1,000
Home Equity [Member] | Chapter 7 Bankruptcy [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	15	30
Pre-Modification Outstanding Recorded Investment	432,000	1,032,000
Post-Modification Outstanding Recorded Investment	382,000	982,000
Total Difference in Recorded Investment	50,000	(50,000)
Home Equity [Member] | Maturity Date Extension [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	6
Pre-Modification Outstanding Recorded Investment	349,000
Post-Modification Outstanding Recorded Investment	348,000
Total Difference in Recorded Investment	1,000
Installment and Other Consumer [Member] | Chapter 7 Bankruptcy [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	5	11
Pre-Modification Outstanding Recorded Investment	30,000	104,000
Post-Modification Outstanding Recorded Investment	23,000	91,000
Total Difference in Recorded Investment	$ 7,000	$ (13,000)

XML

Short-Term Borrowings - Composition of Short-Term Borrowings, Interest Expense and Weighted Average Interest Rate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Short-term Debt [Line Items]
Balance	$ 320,605	$ 173,847	$ 137,582
Interest Expense	514	341	205
Weighted Average Interest Rate	0.27%	0.24%	0.19%
REPOs [Member]
Short-term Debt [Line Items]
Balance	30,605	33,847	62,582
Interest Expense	3	62	82
Weighted Average Interest Rate	0.01%	0.01%	0.20%
FHLB Advances [Member]
Short-term Debt [Line Items]
Balance	290,000	140,000	75,000
Interest Expense	$ 511	$ 279	$ 123
Weighted Average Interest Rate	0.31%	0.30%	0.19%

XML

Deposits (Tables)

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Composition of Deposits and Interest Expenses

The following table presents the composition of deposits at December 31 and interest expense for the years ended December 31:

	2014				2013				2012
(dollars in thousands)	Balance		Interest Expense		Balance		Interest Expense		Balance		Interest Expense
Noninterest-bearing demand	$	1,083,919	$	—	$	992,779	$	—	$	960,980	$	—
Interest-bearing demand	335,099		19		312,790		75		316,760		146
Money market	376,612		572		281,403		446		361,233		528
Savings	1,027,095		1,607		994,805		1,735		965,571		2,356
Certificates of deposit	1,086,117		7,930		1,090,531		9,150		1,033,884		13,766
Total	$	3,908,842	$	10,128	$	3,672,308	$	11,406	$	3,638,428	$	16,796

Scheduled Maturities of Certificates of Deposit

The following table indicates the scheduled maturities of certificates of deposit at December 31, 2014:

(dollars in thousands)	Amount
2015	$	628,889
2016	143,728
2017	230,051
2018	45,139
2019	30,295
Thereafter	8,015
Total	$	1,086,117

XML

Selected Financial Data

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Selected Financial Data

SELECTED FINANCIAL DATA

The following table presents selected financial data for the most recent eight quarters.

	2014									2013
(dollars in thousands, except per share data) (unaudited)	Fourth Quarter		Third Quarter		Second Quarter			First Quarter		Fourth Quarter		Third Quarter		Second Quarter		First Quarter
SUMMARY OF OPERATIONS
Interest income	$	41,381	$	40,605	$	39,872		$	38,665	$	38,779	$	38,581	$	38,553	$	37,843
Interest expense	3,315		3,076		3,017			3,074		3,125		3,307		3,957		4,174
Provision for loan losses	1,106		1,454		(1,134		)	289		1,562		3,419		1,023		2,307
Net interest income after provision for loan losses	36,960		36,075		37,989			35,302		34,092		31,855		33,573		31,362
Security gains, net	—		—		40			1		—		3		—		2
Noninterest income	11,220		11,931		11,731			11,415		11,312		12,539		12,867		14,804
Noninterest expense	29,720		28,440		30,165			28,914		29,447		27,943		28,386		31,616
Income before taxes	18,460		19,566		19,595			17,804		15,957		16,454		18,054		14,552
Provision for income taxes	3,963		4,906		4,875			3,771		4,098		4,207		3,951		2,222
Net Income Available to Common Shareholders	$	14,497	$	14,660	$	14,720		$	14,033	$	11,859	$	12,247	$	14,103	$	12,330
Per Share Data
Common earnings per share—diluted	$	0.49	$	0.49	$	0.49		$	0.47	$	0.40	$	0.41	$	0.47	$	0.41
Dividends declared per common share	0.18		0.17		0.17			0.16		0.16		0.15		0.15		0.15
Common book value	20.42		20.33		20.04			19.64		19.21		18.68		18.39		18.32

XML

Loans and Loans Held for Sale - Summary of Nonperforming Assets of Defaulted TDRs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Contract	Dec. 31, 2013 Contract
Financing Receivable, Modifications [Line Items]
Number of Defaults	3	17
Recorded Investment	$ 64	$ 1,313
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	1
Recorded Investment	0	75
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	2
Recorded Investment	0	438
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	1	8
Recorded Investment	20	607
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	2	6
Recorded Investment	$ 44	$ 193

XML

Tax Effects on Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pre-Tax Amount
Net change in unrealized gains on securities available-for-sale	$ 11,825	$ (16,928)	$ 4,097
Net available-for-sale securities gains reclassified into earnings	(41)	(5)	(3,016)
Adjustment to funded status of employee benefit plans	(13,394)	18,299	(271)
Other Comprehensive Income/(Loss)	(1,610)	1,366	810
Tax (Expense) Benefit
Net change in unrealized gains on securities available-for-sale, Tax (Expense) Benefit	(4,139)	5,925	(1,434)
Net available-for-sale securities gains reclassified into earnings, Tax (Expense) Benefit	15	2	1,055
Adjustment to funded status of employee benefit plans, Tax (Expense) Benefit	4,595	(6,405)	95
Other Comprehensive (Loss) Income, Tax (Expense) Benefit	471	(478)	(284)
Net of Tax Amount
Net change in unrealized gains on securities available-for-sale, Net of Tax Amount	7,686	(11,003)	2,663
Net available-for-sale securities gains reclassified into earnings, Net of Tax Amount	(26)	(3)	(1,961)
Adjustment to funded status of employee benefit plans, Net of Tax Amount	(8,799)	11,894	(176)
Other Comprehensive Income (Loss), After Tax	$ (1,139)	$ 888	$ 526

XML

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2002	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonstatutory stock options, outstanding	155,500	428,900	675,500		757,050
Aggregate intrinsic value of options outstanding	$ 0	$ 0	$ 0
Aggregate intrinsic value of options exercisable	0	0	0
Share-based compensation arrangement by share-based payment award, options, exercises in period	0	0	0
Restricted shares granted		3,247	9,897
Compensation expense	900,000	600,000	900,000
Tax benefit realized on compensation expense	300,000	200,000	300,000
Unrecognized compensation expense to be recognized	$ 1,500,000
Weighted average compensation expense recognize period	1 year 11 months 19 days
Time-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Award vesting after year two, percent	50.00%		50.00%
Restricted Stock Award vesting after year three, percent	50.00%		50.00%
Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
First Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Award vesting after year two, percent		100.00%	100.00%
Senior Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted	66,631	3,247	48,008
Outside Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Restricted shares granted	13,824	18,942	19,362
1992 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock authorized	3,200,000
Stock plan expiration period	10 years
Nonstatutory stock options and restricted stock granted				3,180,822
Stock plan expiration date	Dec. 31, 2012
2003 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock authorized	1,500,000
Stock plan expiration period	10 years
Nonstatutory stock options and restricted stock granted	155,500
Vesting period	10 years
Restricted shares granted	259,673
2014 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock authorized	750,000
Stock plan expiration period	10 years
Restricted shares granted	80,455
2014 LTIP [Member] | Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted	66,631
2012 LTIP [Member] | Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted		0	38,111

XML

Regulatory Matters - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Total trust preferred securities	$ 20.0
Junior subordinated debt, included in Tier 2 capital	$ 25.0

XML

Securities Available-for-Sale - Unrealized Gains (Losses) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Gains	$ 12,647	$ 6,802
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Losses	(1,837)	(7,776)
Total unrealized gains/(losses) on securities available for sale, Net Unrealized Gains	10,810	(974)
Income tax expense/(benefit), Gross Unrealized Gains	4,426	2,381
Income tax expense/(benefit), Gross Unrealized Losses	(643)	(2,722)
Income tax expense/(benefit), Net Unrealized Gains	3,783	(341)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	8,221	4,421
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	(1,194)	(5,054)
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ 7,027	$ (633)

XML

Premises and Equipment - Summary of Premises and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 84,089	$ 79,596
Accumulated depreciation	(45,923)	(42,981)
Premises and equipment, net	38,166	36,615
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	6,193	6,193
Premises [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	44,690	42,320
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	26,661	25,139
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 6,545	$ 5,944

XML

Other Noninterest Expense (Tables)

12 Months Ended

Dec. 31, 2014

Other Income and Expenses [Abstract]

Summary of Other Noninterest Expenses

Other noninterest expense is presented in the table below:

	Years Ended December 31,
(dollars in thousands)	2014		2013		2012
Other noninterest expenses:
Joint venture amortization	$	4,054	$	4,095	$	4,199
Loan related expenses	2,579		2,432		2,538
Telecommunications	2,220		1,691		1,415
Amortization of intangibles	1,129		1,591		1,709
Other real estate owned	264		445		2,166
Other	11,224		10,661		12,815
Total Other Noninterest Expenses	$	21,470	$	20,915	$	24,842

XML

Long-Term Borrowings and Subordinated Debt - Schedule of Junior Subordinated Debt Securities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Junior Subordinated Debentures [Line Items]
Junior Subordinated Debt	$ 45,619	$ 45,619	$ 90,619
Interest Rate at December 31, 2014	3.00%	3.01%	3.17%
2006 Junior Subordinated Debt [Member]
Junior Subordinated Debentures [Line Items]
Junior Subordinated Debt	25,000	25,000	25,000
Stated Maturity Date	Dec. 15, 2036
Optional redemption date at par	Any time after 9/15/2011
Regulatory Capital	Tier 2
Interest Rate at December 31, 2014	1.84%
2008 Junior Subordinated Debt-Trust Preferred Securities [Member]
Junior Subordinated Debentures [Line Items]
Junior Subordinated Debt	20,619	20,619	20,619
Trust Preferred Securities	20,619
Stated Maturity Date	Mar. 15, 2038
Optional redemption date at par	Any time after 3/15/2013
Regulatory Capital	Tier 1
Interest Rate at December 31, 2014	3.74%
2008 Junior Subordinated Debt [Member]
Junior Subordinated Debentures [Line Items]
Junior Subordinated Debt	20,000
Stated Maturity Date	Jun. 15, 2018
Optional redemption date at par	Any time after 6/15/2013
Regulatory Capital	Tier 2
Interest Rate at December 31, 2014	0.00%
2008 Junior Subordinated Debt [Member]
Junior Subordinated Debentures [Line Items]
Junior Subordinated Debt	$ 25,000
Stated Maturity Date	May 30, 2018
Optional redemption date at par	Any time after 5/30/2013
Regulatory Capital	Tier 2
Interest Rate at December 31, 2014	0.00%
3-Month LIBOR [Member] | 2006 Junior Subordinated Debt [Member]
Junior Subordinated Debentures [Line Items]
Basis spread on base interest rate	1.60%
3-Month LIBOR [Member] | 2008 Junior Subordinated Debt-Trust Preferred Securities [Member]
Junior Subordinated Debentures [Line Items]
Basis spread on base interest rate	3.50%
3-Month LIBOR [Member] | 2008 Junior Subordinated Debt [Member]
Junior Subordinated Debentures [Line Items]
Basis spread on base interest rate	3.50%
3-Month LIBOR [Member] | 2008 Junior Subordinated Debt [Member]
Junior Subordinated Debentures [Line Items]
Basis spread on base interest rate	2.50%

XML

Regulatory Matters - Summary of Risk-Based Capital Amounts and Ratios for S&T and S&T Bank (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum requirement for most highly-rated financial institutions	3.00%
S&T [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount	$ 537,935	$ 494,986
Total Capital (to Risk-Weighted Assets), Actual Ratio	14.27%	14.36%
Total Capital (to Risk-Weighted Assets), Minimum Regulatory Capital Requirements Amount	301,548	275,684
Total Capital (to Risk-Weighted Assets), Minimum Regulatory Capital Requirements Ratio	8.00%	8.00%
Total Capital (to Risk-Weighted Assets), To be Well Capitalized Amount	376,936	344,606
Total Capital (to Risk-Weighted Assets), To be Well Capitalized Ratio	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount	465,114	426,234
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio	12.34%	12.37%
Tier 1 Capital (to Risk-Weighted Assets), Minimum Regulatory Capital Requirements Amount	150,774	137,842
Tier 1 Capital (to Risk-Weighted Assets), Minimum Regulatory Capital Requirements Ratio	4.00%	4.00%
Tier 1 Capital (to Risk-Weighted Assets), To be Well Capitalized Amount	226,161	206,763
Tier 1 Capital (to Risk-Weighted Assets), To be Well Capitalized Ratio	6.00%	6.00%
Leverage Ratio, Actual Amount	465,114	426,234
Leverage Ratio, Actual Ratio	9.80%	9.75%
Leverage Ratio, Minimum Regulatory Capital Requirements Amount	189,895	174,824
Leverage Ratio, Minimum Regulatory Capital Requirements Ratio	4.00%	4.00%
Leverage Ratio, To be Well Capitalized Amount	237,369	218,530
Leverage Ratio, To be Well Capitalized Ratio	5.00%	5.00%
S&T Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount	475,538	457,540
Total Capital (to Risk-Weighted Assets), Actual Ratio	12.68%	13.35%
Total Capital (to Risk-Weighted Assets), Minimum Regulatory Capital Requirements Amount	300,095	274,257
Total Capital (to Risk-Weighted Assets), Minimum Regulatory Capital Requirements Ratio	8.00%	8.00%
Total Capital (to Risk-Weighted Assets), To be Well Capitalized Amount	375,119	342,821
Total Capital (to Risk-Weighted Assets), To be Well Capitalized Ratio	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount	403,593	389,584
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio	10.76%	11.36%
Tier 1 Capital (to Risk-Weighted Assets), Minimum Regulatory Capital Requirements Amount	150,048	137,128
Tier 1 Capital (to Risk-Weighted Assets), Minimum Regulatory Capital Requirements Ratio	4.00%	4.00%
Tier 1 Capital (to Risk-Weighted Assets), To be Well Capitalized Amount	225,071	205,693
Tier 1 Capital (to Risk-Weighted Assets), To be Well Capitalized Ratio	6.00%	6.00%
Leverage Ratio, Actual Amount	403,593	389,584
Leverage Ratio, Actual Ratio	8.53%	8.95%
Leverage Ratio, Minimum Regulatory Capital Requirements Amount	189,182	174,081
Leverage Ratio, Minimum Regulatory Capital Requirements Ratio	4.00%	4.00%
Leverage Ratio, To be Well Capitalized Amount	$ 236,477	$ 217,601
Leverage Ratio, To be Well Capitalized Ratio	5.00%	5.00%

XML

Loans and Loans Held for Sale - Composition of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Composition of the loans
Commercial loans	$ 2,892,522	$ 2,593,880
Consumer loans	976,224	972,319
Total Portfolio Loans	3,868,746	3,566,199
Loans held for sale	2,970	2,136
Total Loans	3,871,716	3,568,335
Commercial Real Estate [Member]
Composition of the loans
Commercial loans	1,682,236	1,607,756
Total Portfolio Loans	1,682,236	1,607,756
Commercial and Industrial [Member]
Composition of the loans
Commercial loans	994,138	842,449
Total Portfolio Loans	994,138	842,449
Commercial Construction [Member]
Composition of the loans
Commercial loans	216,148	143,675
Total Portfolio Loans	216,148	143,675
Residential Mortgage [Member]
Composition of the loans
Consumer loans	489,586	487,092
Total Portfolio Loans	489,586	487,092
Home Equity [Member]
Composition of the loans
Consumer loans	418,563	414,195
Total Portfolio Loans	418,563	414,195
Installment and Other Consumer [Member]
Composition of the loans
Consumer loans	65,567	67,883
Total Portfolio Loans	65,567	67,883
Consumer Construction [Member]
Composition of the loans
Consumer loans	2,508	3,149
Total Portfolio Loans	$ 2,508	$ 3,149

XML

Allowance for Loan Losses - Investments in Loans Considered to be Impaired and Related Information on Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	$ 63	$ 767
With a related allowance recorded, Unpaid Principal Balance	63	1,469
With a related allowance recorded, Related Allowance	54	97
Without a related allowance recorded, Recorded Investment	43,914	52,089
Without a related allowance, Unpaid Principal Balance	53,785	67,122
Without a related allowance recorded, Related Allowance	0	0
Impaired Financing Receivable, Recorded Investment, Total	43,977	52,856
Impaired Financing Receivable, Unpaid Principal Balance, Total	53,848	68,591
Impaired Financing Receivable, Related Allowance	54	97
With a related allowance recorded, Average Recorded Investment	72	3,631
With a related allowance recorded, Interest Income Recognized	6	59
Without a related allowance recorded, Average Recorded Investment	44,978	63,693
Without a related allowance recorded, Interest Income Recognized	1,550	1,951
Impaired Financing Receivable, Average Recorded Investment, Total	45,050	67,324
Impaired Financing Receivable, Interest Income Recognized, Total	1,556	2,010
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	0	0
With a related allowance recorded, Unpaid Principal Balance	0	0
With a related allowance recorded, Related Allowance	0	0
Without a related allowance recorded, Recorded Investment	19,890	26,968
Without a related allowance, Unpaid Principal Balance	25,262	35,474
Without a related allowance recorded, Related Allowance	0	0
Impaired Financing Receivable, Recorded Investment, Total	19,890	26,968
Impaired Financing Receivable, Unpaid Principal Balance, Total	25,262	35,474
Impaired Financing Receivable, Related Allowance	0	0
With a related allowance recorded, Average Recorded Investment	0	1,895
With a related allowance recorded, Interest Income Recognized	0	0
Without a related allowance recorded, Average Recorded Investment	20,504	29,314
Without a related allowance recorded, Interest Income Recognized	684	929
Impaired Financing Receivable, Average Recorded Investment, Total	20,504	31,209
Impaired Financing Receivable, Interest Income Recognized, Total	684	929
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	0	0
With a related allowance recorded, Unpaid Principal Balance	0	0
With a related allowance recorded, Related Allowance	0	0
Without a related allowance recorded, Recorded Investment	9,218	9,580
Without a related allowance, Unpaid Principal Balance	9,449	9,703
Without a related allowance recorded, Related Allowance	0	0
Impaired Financing Receivable, Recorded Investment, Total	9,218	9,580
Impaired Financing Receivable, Unpaid Principal Balance, Total	9,449	9,703
Impaired Financing Receivable, Related Allowance	0	0
With a related allowance recorded, Average Recorded Investment	0	0
With a related allowance recorded, Interest Income Recognized	0	0
Without a related allowance recorded, Average Recorded Investment	9,246	11,439
Without a related allowance recorded, Interest Income Recognized	241	254
Impaired Financing Receivable, Average Recorded Investment, Total	9,246	11,439
Impaired Financing Receivable, Interest Income Recognized, Total	241	254
Commercial Construction [Member]
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	0	681
With a related allowance recorded, Unpaid Principal Balance	0	1,383
With a related allowance recorded, Related Allowance	0	25
Without a related allowance recorded, Recorded Investment	7,605	7,391
Without a related allowance, Unpaid Principal Balance	11,293	12,353
Without a related allowance recorded, Related Allowance	0	0
Impaired Financing Receivable, Recorded Investment, Total	7,605	8,072
Impaired Financing Receivable, Unpaid Principal Balance, Total	11,293	13,736
Impaired Financing Receivable, Related Allowance	0	25
With a related allowance recorded, Average Recorded Investment	0	1,652
With a related allowance recorded, Interest Income Recognized	0	49
Without a related allowance recorded, Average Recorded Investment	8,145	14,112
Without a related allowance recorded, Interest Income Recognized	227	326
Impaired Financing Receivable, Average Recorded Investment, Total	8,145	15,764
Impaired Financing Receivable, Interest Income Recognized, Total	227	375
Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	43	53
With a related allowance recorded, Unpaid Principal Balance	43	53
With a related allowance recorded, Related Allowance	43	53
Without a related allowance recorded, Recorded Investment	7,159	8,026
Without a related allowance, Unpaid Principal Balance	7,733	9,464
Without a related allowance recorded, Related Allowance	0	0
Impaired Financing Receivable, Recorded Investment, Total	7,202	8,079
Impaired Financing Receivable, Unpaid Principal Balance, Total	7,776	9,517
Impaired Financing Receivable, Related Allowance	43	53
With a related allowance recorded, Average Recorded Investment	48	60
With a related allowance recorded, Interest Income Recognized	4	6
Without a related allowance recorded, Average Recorded Investment	7,027	8,714
Without a related allowance recorded, Interest Income Recognized	396	436
Impaired Financing Receivable, Average Recorded Investment, Total	7,074	8,774
Impaired Financing Receivable, Interest Income Recognized, Total	400	442
Other Consumer [Member]
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	20	33
With a related allowance recorded, Unpaid Principal Balance	20	33
With a related allowance recorded, Related Allowance	11	19
Without a related allowance recorded, Recorded Investment	42	124
Without a related allowance, Unpaid Principal Balance	48	128
Without a related allowance recorded, Related Allowance	0	0
Impaired Financing Receivable, Recorded Investment, Total	62	157
Impaired Financing Receivable, Unpaid Principal Balance, Total	68	161
Impaired Financing Receivable, Related Allowance	11	19
With a related allowance recorded, Average Recorded Investment	24	24
With a related allowance recorded, Interest Income Recognized	2	4
Without a related allowance recorded, Average Recorded Investment	56	114
Without a related allowance recorded, Interest Income Recognized	2	6
Impaired Financing Receivable, Average Recorded Investment, Total	81	138
Impaired Financing Receivable, Interest Income Recognized, Total	$ 4	$ 10

XML

Loans and Loans Held for Sale - Summary of Aggregate Amount of Loans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Loans Receivable from Officers and Directors [Roll Forward]
Balance at beginning of year	$ 23,848	$ 36,075
New loans	27,799	22,534
Repayments	(24,279)	(34,761)
Balance at End of Year	$ 27,368	$ 23,848

XML

Allowance for Loan Losses - Summary of Allowance for Loan Losses (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year				$ 46,255				$ 46,484	$ 46,255	$ 46,484
Charge-offs									(6,353)	(15,576)
Recoveries									6,294	7,036
Net (Charge-offs)/ Recoveries									(59)	(8,540)
Provision for loan losses	1,106	1,454	(1,134)	289	1,562	3,419	1,023	2,307	1,715	8,311	22,815
Balance at End of Year	47,911				46,255				47,911	46,255	46,484
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year				18,921				25,246	18,921	25,246
Charge-offs									(2,041)	(4,601)
Recoveries									1,798	3,388
Net (Charge-offs)/ Recoveries									(243)	(1,213)
Provision for loan losses									1,486	(5,112)
Balance at End of Year	20,164				18,921				20,164	18,921
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year				14,433				7,759	14,433	7,759
Charge-offs									(1,267)	(2,714)
Recoveries									3,647	2,142
Net (Charge-offs)/ Recoveries									2,380	(572)
Provision for loan losses									(3,145)	7,246
Balance at End of Year	13,668				14,433				13,668	14,433
Commercial Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year				5,374				7,500	5,374	7,500
Charge-offs									(712)	(4,852)
Recoveries									146	531
Net (Charge-offs)/ Recoveries									(566)	(4,321)
Provision for loan losses									1,285	2,195
Balance at End of Year	6,093				5,374				6,093	5,374
Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year				6,362				5,058	6,362	5,058
Charge-offs									(1,200)	(2,407)
Recoveries									350	651
Net (Charge-offs)/ Recoveries									(850)	(1,756)
Provision for loan losses									821	3,060
Balance at End of Year	6,333				6,362				6,333	6,362
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year				1,165				921	1,165	921
Charge-offs									(1,133)	(1,002)
Recoveries									353	324
Net (Charge-offs)/ Recoveries									(780)	(678)
Provision for loan losses									1,268	922
Balance at End of Year	$ 1,653				$ 1,165				$ 1,653	$ 1,165

XML

Loans and Loans Held for Sale - Restructured Loans for Periods Presented (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Modifications [Line Items]
Restructured loans	$ 4,777	$ 11,018
Performing Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	36,983	39,229
Performing Financing Receivable [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	16,939	19,711
Performing Financing Receivable [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	8,074	7,521
Performing Financing Receivable [Member] | Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	5,736	5,338
Performing Financing Receivable [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	2,839	2,581
Performing Financing Receivable [Member] | Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	3,342	3,924
Performing Financing Receivable [Member] | Installment and Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	53	154
Nonperforming Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	5,436	10,067
Nonperforming Financing Receivable [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	2,180	3,898
Nonperforming Financing Receivable [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	356	1,884
Nonperforming Financing Receivable [Member] | Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	1,869	2,708
Nonperforming Financing Receivable [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	459	1,356
Nonperforming Financing Receivable [Member] | Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	562	218
Nonperforming Financing Receivable [Member] | Installment and Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	10	3
Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	42,419	49,296
Financing Receivable [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	19,119	23,609
Financing Receivable [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	8,430	9,405
Financing Receivable [Member] | Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	7,605	8,046
Financing Receivable [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	3,298	3,937
Financing Receivable [Member] | Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	3,904	4,142
Financing Receivable [Member] | Installment and Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Restructured loans	$ 63	$ 157

XML

Securities Available-for-Sale - Fair Value and Age of Gross Unrealized Losses by Investment Category (Detail) (USD $)	Dec. 31, 2014 security	Dec. 31, 2013 security
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	7	41
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 59,329,000	$ 274,942,000
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	(381,000)	(6,913,000)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	13	2
Available-for-sale Securities, 12 Months or More, Fair Value	103,527,000	10,088,000
Available-for-sale Securities, 12 Months or More, Unrealized Losses	(1,456,000)	(863,000)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	20	43
Available-for-sale Securities, Fair Value, Total	162,856,000	285,030,000
Available-for-sale Securities, Unrealized Losses, Total	(1,837,000)	(7,776,000)
Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	4	16
Available-for-sale Securities, Less Than 12 Months, Fair Value	39,745,000	126,017,000
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	(207,000)	(2,581,000)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	8	0
Available-for-sale Securities, 12 Months or More, Fair Value	63,149,000	0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	(871,000)	0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	12	16
Available-for-sale Securities, Fair Value, Total	102,894,000	126,017,000
Available-for-sale Securities, Unrealized Losses, Total	(1,078,000)	(2,581,000)
Collateralized Mortgage Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	1	3
Available-for-sale Securities, Less Than 12 Months, Fair Value	9,323,000	39,522,000
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	(148,000)	(603,000)
Available-for-sale Securities, 12 Months or More, Fair Value	0	0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	0	0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1	3
Available-for-sale Securities, Fair Value, Total	9,323,000	39,522,000
Available-for-sale Securities, Unrealized Losses, Total	(148,000)	(603,000)
Residential Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	0	2
Available-for-sale Securities, Less Than 12 Months, Fair Value	0	22,822,000
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	0	(685,000)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	1	0
Available-for-sale Securities, 12 Months or More, Fair Value	8,982,000	0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	(154,000)	0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1	2
Available-for-sale Securities, Fair Value, Total	8,982,000	22,822,000
Available-for-sale Securities, Unrealized Losses, Total	(154,000)	(685,000)
Commercial Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	1	4
Available-for-sale Securities, Less Than 12 Months, Fair Value	9,998,000	39,052,000
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	(25,000)	(1,305,000)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	2	0
Available-for-sale Securities, 12 Months or More, Fair Value	20,640,000	0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	(368,000)	0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	3	4
Available-for-sale Securities, Fair Value, Total	30,638,000	39,052,000
Available-for-sale Securities, Unrealized Losses, Total	(393,000)	(1,305,000)
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	1	16
Available-for-sale Securities, Less Than 12 Months, Fair Value	263,000	47,529,000
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	(1,000)	(1,739,000)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	2	2
Available-for-sale Securities, 12 Months or More, Fair Value	10,756,000	10,088,000
Available-for-sale Securities, 12 Months or More, Unrealized Losses	(63,000)	(863,000)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	3	18
Available-for-sale Securities, Fair Value, Total	11,019,000	57,617,000
Available-for-sale Securities, Unrealized Losses, Total	(64,000)	(2,602,000)
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Unrealized Losses, Total	$ 0

XML

Income Taxes

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

Income tax expense (benefit) for the years ended December 31 are comprised of:

(dollars in thousands)	2014		2013			2012
Current	$	15,979	$	16,836		$	6,223
Deferred	1,536		(2,358		)	1,038
Total	$	17,515	$	14,478		$	7,261

The provision for income taxes differs from the amount computed by applying the statutory federal income tax rate to income before income taxes. We ordinarily generate an annual effective tax rate that is less than the statutory rate of 35 percent primarily due to benefits resulting from tax-exempt interest, excludable dividend income, tax-exempt income on BOLI and tax benefits associated with LIHTC from certain partnership investments.

The statutory to effective tax rate reconciliation for the years ended December 31 is as follows:

	2014		2013		2012
Statutory tax rate	35.0	%	35.0	%	35.0	%
Low income housing tax credits	(5.8	)%	(6.8	)%	(10.5	)%
Tax-exempt interest	(4.6	)%	(4.5	)%	(6.7	)%
Bank owned life insurance	(0.8	)%	(1.0	)%	(1.2	)%
Other	(0.6	)%	(0.4	)%	0.9	%
Effective Tax Rate	23.2	%	22.3	%	17.5	%

Significant components of our temporary differences were as follows at December 31:

(dollars in thousands)	2014			2013
Deferred Tax Liabilities:
Net unrealized holding gains on securities available-for-sale	$	(3,783	)	$	—
Prepaid pension	(3,472		)	(3,730		)
Deferred loan income	(2,165		)	(1,614		)
Purchase accounting adjustments	(631		)	(801		)
Depreciation on premises and equipment	(1,590		)	(1,061		)
Other	(812		)	(823		)
Total Deferred Tax liabilities	(12,453		)	(8,029		)
Deferred Tax Assets:
Net unrealized holding losses on securities available-for-sale	—			361
Allowance for loan losses	17,567			18,890
Other employee benefits	2,453			2,369
Low income housing partnerships	4,049			3,147
Net adjustment to funded status of pension	11,089			6,495
Impairment of securities	1,313			1,313
Delinquent interest on nonaccrual loans	—			1,626
State net operating loss carryforwards	2,249			1,828
Other	4,668			3,950
Gross Deferred Tax Assets	43,388			39,979
Less: Valuation allowance	(2,249		)	(2,199		)
Total Deferred Tax Assets	41,139			37,780
Net Deferred Tax Asset	$	28,686		$	29,751

We establish a valuation allowance when it is more likely than not that we will not be able to realize the benefit of the deferred tax assets. Except for Pennsylvania net operating losses, or NOLs, we have determined that a valuation allowance is unnecessary for the deferred tax assets because it is more likely than not that these assets will be realized through future reversals of existing temporary differences and through future taxable income. The valuation allowance is reviewed quarterly and adjusted based on management’s assessments of realizable deferred tax assets. Gross deferred tax assets were reduced by a valuation allowance of $2.2 million in 2014 related to Pennsylvania income tax NOLs. The PA NOL carryforwards total $22.5 million and will expire in the years 2020-2034.

Unrecognized Tax Benefits

A reconciliation of the change in Federal and State gross unrecognized tax benefits, or UTB, for the years ended December 31:

(dollars in thousands)	2014			2013		2012
Balance at beginning of year	$	1,902		$	978	$	200
Prior period tax positions
Increase	55			924		—
Decrease	(1,673		)	—		—
Current period tax positions	—			—		913
Reductions for statute of limitations expirations	—			—		(135		)
Balance at End of Year	$	284		$	1,902	$	978
Amount That Would Affect the Effective Tax Rate if Recognized	$	184		$	148	$	147

We classify interest and penalties as an element of tax expense. We monitor changes in tax statutes and regulations to determine if significant changes will occur over the next 12 months. In 2014, we reduced our reserve for tax and interest by $1.7 million to eliminate our UTB relating to Bad Debts that existed at December 31, 2013. Upon review of Large Business & International Directive 04-1014-008 issued October 24, 2014, we determined it is more likely than not upon examination our filing position, for which we previously maintained a reserve for UTB, would be upheld. As of December 31, 2014, no other significant changes to UTB are projected, however, tax audit examinations are possible.

We recognized $0.1 million related to interest in 2014, $0.2 million related to interest in 2013 and 2012 in the Consolidated Statements of Net Income.

During 2013, the IRS completed its examination of our 2010 tax year. The examination was closed with no material adjustments impacting tax expense. As of December 31, 2014, all income tax returns filed for the tax years 2011 through 2013 remain subject to examination by the IRS.

XML

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Schedule of Income Tax Expense (Benefit)

(dollars in thousands)	2014		2013			2012
Current	$	15,979	$	16,836		$	6,223
Deferred	1,536		(2,358		)	1,038
Total	$	17,515	$	14,478		$	7,261

Schedule of Statutory to Effective Tax Rate Reconciliation

	2014		2013		2012
Statutory tax rate	35.0	%	35.0	%	35.0	%
Low income housing tax credits	(5.8	)%	(6.8	)%	(10.5	)%
Tax-exempt interest	(4.6	)%	(4.5	)%	(6.7	)%
Bank owned life insurance	(0.8	)%	(1.0	)%	(1.2	)%
Other	(0.6	)%	(0.4	)%	0.9	%
Effective Tax Rate	23.2	%	22.3	%	17.5	%

Schedule of Significant Components of Temporary Differences with Deferred Tax Assets and Liabilities

Significant components of our temporary differences were as follows at December 31:

(dollars in thousands)	2014			2013
Deferred Tax Liabilities:
Net unrealized holding gains on securities available-for-sale	$	(3,783	)	$	—
Prepaid pension	(3,472		)	(3,730		)
Deferred loan income	(2,165		)	(1,614		)
Purchase accounting adjustments	(631		)	(801		)
Depreciation on premises and equipment	(1,590		)	(1,061		)
Other	(812		)	(823		)
Total Deferred Tax liabilities	(12,453		)	(8,029		)
Deferred Tax Assets:
Net unrealized holding losses on securities available-for-sale	—			361
Allowance for loan losses	17,567			18,890
Other employee benefits	2,453			2,369
Low income housing partnerships	4,049			3,147
Net adjustment to funded status of pension	11,089			6,495
Impairment of securities	1,313			1,313
Delinquent interest on nonaccrual loans	—			1,626
State net operating loss carryforwards	2,249			1,828
Other	4,668			3,950
Gross Deferred Tax Assets	43,388			39,979
Less: Valuation allowance	(2,249		)	(2,199		)
Total Deferred Tax Assets	41,139			37,780
Net Deferred Tax Asset	$	28,686		$	29,751

Schedule of Reconciliation of Change in Federal and State Gross Unrecognized Tax Benefits

A reconciliation of the change in Federal and State gross unrecognized tax benefits, or UTB, for the years ended December 31:

(dollars in thousands)	2014			2013		2012
Balance at beginning of year	$	1,902		$	978	$	200
Prior period tax positions
Increase	55			924		—
Decrease	(1,673		)	—		—
Current period tax positions	—			—		913
Reductions for statute of limitations expirations	—			—		(135		)
Balance at End of Year	$	284		$	1,902	$	978
Amount That Would Affect the Effective Tax Rate if Recognized	$	184		$	148	$	147

XML

Premises and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Summary of Premises and Equipment

The following table is a summary of premises and equipment as of the dates presented:

	December 31,
(dollars in thousands)	2014			2013
Land	$	6,193		$	6,193
Premises	44,690			42,320
Furniture and equipment	26,661			25,139
Leasehold improvements	6,545			5,944
	84,089			79,596
Accumulated depreciation	(45,923		)	(42,981		)
Total	$	38,166		$	36,615

Minimum Annual Rental and Renewal Option Payments

Minimum annual rental and renewal option payments for each of the following five years and thereafter are approximately:

(dollars in thousands)	Operating		Capital		Total
2015	$	2,274	$	76	$	2,350
2016	2,200		76		2,276
2017	2,178		76		2,254
2018	2,143		76		2,219
2019	2,156		77		2,233
Thereafter	40,352		687		41,039
Total	$	51,303	$	1,068	$	52,371

XML

Loans and Loans Held for Sale - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 SecurityLoan TDRs Property	Dec. 31, 2013 TDRs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unearned Income On Loan	$ 2,100,000	$ 1,300,000
Percentage of commercial loans in total portfolio loans	75.00%	73.00%
Maximum concentration of commercial real estate and commercial construction portfolio in loans	9.00%	9.00%
Financial receivable trouble debt restructuring reclassified to accruing trouble debt restructuring status	1,900,000	6,900,000
Number of TDRs returned back to accruing status	9	6
Number of loan modified	6
Commitment to lend additional funds on TDRs	0
Minimum period of loan payment defaults following restructure for TDRs to be in default	90 days
Other real estate owned properties	5
CRE and Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combined percentage of commercial real estate and commercial construction in total commercial loans	66.00%	68.00%
Combined percentage of commercial real estate and commercial construction in total portfolio loans	49.00%	49.00%
Out-of-state exposure of combined portfolio	8.00%	7.90%
Percentage of total loans out-of-state	3.90%	3.90%
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan modified	4
Loans modified not considered to be troubled debt restructuring	3,200,000
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan modified	2
Loans modified not considered to be troubled debt restructuring	$ 1,200,000
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan modified	1

XML

Derivative Instruments and Hedging Activities - Schedule of Gross Amounts of Derivative Assets and Derivative Liabilities (Detail) (Not Designated as Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Not Designated as Hedging Instruments [Member]
Derivatives not Designated as Hedging Instruments
Gross amounts recognized	$ 13,203	$ 14,012
Gross amounts offset	(222)	(314)
Net amounts presented in the Consolidated Balance Sheets	12,981	13,698
Net Amount	12,981	13,698
Gross amounts recognized	13,175	13,961
Gross amounts offset	(222)	(314)
Net amounts presented in the Consolidated Balance Sheets	12,953	13,647
Gross amounts not offset	(12,059)	(12,611)
Net Amount	$ 894	$ 1,036

XML

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Reconciles Numerators and Denominators of Basic Earnings Per Share and Diluted Earnings Per Share

The following table reconciles the numerators and denominators of basic and diluted EPS:

	Years ended December 31,
(dollars in thousands, except share and per share data)	2014		2013		2012
Numerator for Earnings per Common Share—Basic:
Net income	$	57,910	$	50,539	$	34,200
Less: Income allocated to participating shares	165		147		126
Net Income Allocated to Common Shareholders	$	57,745	$	50,392	$	34,074
Numerator for Earnings per Common Share—Diluted:
Net income	$	57,910	$	50,539	$	34,200
Denominators:
Weighted Average Common Shares Outstanding—Basic	29,683,103		29,647,231		28,976,619
Add: Dilutive potential common shares	25,621		35,322		32,261
Denominator for Treasury Stock Method—Diluted	29,708,724		29,682,553		29,008,880
Weighted Average Common Shares Outstanding—Basic	29,683,103		29,647,231		28,976,619
Add: Average participating shares outstanding	84,918		86,490		107,274
Denominator for Two-Class Method—Diluted	29,768,021		29,733,721		29,083,893
Earnings per common share—basic	$	1.95	$	1.70	$	1.18
Earnings per common share—diluted	$	1.95	$	1.70	$	1.18
Warrants considered anti-dilutive excluded from dilutive potential common shares - exercise price $31.53 per share, expires January 2019	517,012		517,012		517,012
Stock options considered anti-dilutive excluded from dilutive potential common shares	419,538		619,418		747,443
Restricted stock considered anti-dilutive excluded from dilutive potential common shares	59,297		51,169		75,012

XML

Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Benefit Obligation and Plan Assets Deriving Funded Status, in Other Liabilities

The following table summarizes the activity in the benefit obligation and Plan assets deriving the funded status, which is recorded in other liabilities in the Consolidated Balance Sheets:

(dollars in thousands)	2014			2013
Change in Projected Benefit Obligation
Projected benefit obligation at beginning of year	$	95,969		$	102,454
Service cost	2,369			2,767
Interest cost	4,470			3,985
Actuarial loss (gain)	16,020			(7,167		)
Benefits paid	(5,704		)	(6,070		)
Projected Benefit Obligation at End of Year	$	113,124		$	95,969
Change in Plan Assets
Fair value of plan assets at beginning of year	$	89,556		$	81,088
Actual return on plan assets	9,634			14,538
Benefits paid	(5,704		)	(6,070		)
Fair Value of Plan Assets at End of Year	$	93,486		$	89,556
Funded Status	$	(19,638	)	$	(6,413	)

Accumulated Other Comprehensive Income (Loss)

The following table sets forth the amounts recognized in accumulated other comprehensive income (loss) at December 31:

(dollars in thousands)	2014			2013
Prior service credit	$	(1,167	)	$	(1,304	)
Net actuarial loss	30,726			18,373
Total (Before Tax Effects)	$	29,559		$	17,069

Actuarial Weighted Average Assumptions Used in Determining Benefit Obligation

Below are the actuarial weighted average assumptions used in determining the benefit obligation:

	2014		2013
Discount rate	4.00	%	4.75	%
Rate of compensation increase	3.00	%	3.00	%

Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss)

The following table summarizes the components of net periodic pension cost and other changes in Plan assets and benefit obligation recognized in other comprehensive income (loss) for the years ended December 31:

(dollars in thousands)	2014			2013			2012
Components of Net Periodic Pension Cost
Service cost—benefits earned during the period	$	2,369		$	2,767		$	2,788
Interest cost on projected benefit obligation	4,470			3,985			4,358
Expected return on plan assets	(6,907		)	(6,207		)	(5,564		)
Amortization of prior service cost (credit)	(137		)	(138		)	(137		)
Recognized net actuarial loss	941			2,425			2,474
Net Periodic Pension Expense	$	736		$	2,832		$	3,919
Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss)
Net actuarial loss (gain)	$	13,294		$	(15,499	)	$	2,477
Recognized net actuarial loss	(941		)	(2,425		)	(2,474		)
Recognized prior service credit	137			138			137
Total (Before Tax Effects)	$	12,490		$	(17,786	)	$	140
Total Recognized in Net Benefit Cost and Other Comprehensive Income (Loss) (Before Tax Effects)	$	13,226		$	(14,954	)	$	4,059

Actuarial Weighted Average Assumptions Used in Determining Net Periodic Pension Cost

The following table summarizes the actuarial weighted average assumptions used in determining net periodic pension cost:

	2014		2013		2012
Discount rate	4.75	%	4.00	%	4.75	%
Rate of compensation increase	3.00	%	3.00	%	4.00	%
Expected return on assets	8.00	%	8.00	%	8.00	%

Estimated Future Benefit Payments

The following table provides information regarding estimated future benefit payments to be paid in each of the next five years and in the aggregate for the five years thereafter:

(dollars in thousands)	Amount
2015	$	6,440
2016	6,437
2017	6,268
2018	6,719
2019	6,637
2020 - 2024	38,984

Pension Plan Assets Measured at Fair Value on Recurring Basis

The following tables present our Plan assets measured at fair value on a recurring basis by fair value hierarchy level at December 31, 2014 and 2013. There were no transfers between Level 1 and Level 2 for items of a recurring basis during the periods presented. There were no purchases or transfers of Level 3 plan assets in 2014.

	December 31, 2014
	Fair Value Asset Classes(1)
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents(2)	$	—	$	5,073	$	—	$	5,073
Fixed Income(3)	26,726		—		—		26,726
Equities:
Equity index mutual funds—international(4)	3,728		—		—		3,728
Domestic Individual Equities(5)	57,085		—		—		57,085
International Individual Equities(6)	874		—		—		874
Total Assets at Fair Value	$	88,413	$	5,073	$	—	$	93,486

(1) Refer to Note 1 Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy.

(2) This asset class includes FDIC insured money market instruments.

(3) This asset class includes a variety of fixed income mutual funds which primarily invests in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar.

(4) The sole investment within this asset class is the Harbor International Institutional fund.

(5) This asset class includes individual domestic equities invested in an active all-cap strategy. It may also include convertible bonds.

(6) This asset class includes American Depository Receipts, or ADR.

	December 31, 2013
	Fair Value Asset Classes(1)
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents(2)	$	—	$	2,946	$	—	$	2,946
Fixed Income(3)	26,448		—		—		26,448
Equities:
Equity index mutual funds—domestic(4)	1,558		—		—		1,558
Equity index mutual funds—international(5)	2,497		—		—		2,497
Domestic Individual Equities(6)	55,206		—		—		55,206
International Individual Equities(7)	901		—		—		901
Total Assets at Fair Value	$	86,610	$	2,946	$	—	$	89,556

(1) Refer to Note 1 Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy.

(2) This asset class includes FDIC insured money market instruments.

(3) This asset class includes a variety of fixed income mutual funds which primarily invests in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar.

(4) The sole investment within this asset class is S&P 600 index iShares.

(5) The sole investment within this asset class is MSCI EAFE Index iShares.

(6) This asset class includes individual domestic equities invested in an active all-cap strategy. It may also include convertible bonds.

(7) This asset class includes American Depository Receipts, or ADR.

XML

Restrictions on Cash and Due from Bank Accounts - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash and Cash Equivalents [Abstract]
Interest-bearing average reserves	$ 41.8	$ 39.7	$ 36.6

XML

Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Allowance for unfunded commitments	$ 2.3	$ 2.9
Data processing and communication charges	9.8	9.5	10.3
Data processing contract termination and conversion cost expenses		$ 0.8

XML

Earnings Per Share - Reconciles Numerators and Denominators of Basic Earnings Per Share and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator for Earnings per Common Share-Basic:
Net Income									$ 57,910	$ 50,539	$ 34,200
Less: Income allocated to participating shares									165	147	126
Net Income Allocated to Common Shareholders	14,497	14,660	14,720	14,033	11,859	12,247	14,103	12,330	57,745	50,392	34,074
Numerator for Earnings per Common Share-Diluted:
Net Income									$ 57,910	$ 50,539	$ 34,200
Denominators:
Weighted Average Common Shares Outstanding-Basic									29,683,103	29,647,231	28,976,619
Add: Dilutive potential common shares									25,621	35,322	32,261
Denominator for Treasury Stock Method-Diluted									29,708,724	29,682,553	29,008,880
Weighted Average Common Shares Outstanding-Basic									29,683,103	29,647,231	28,976,619
Add: Average participating shares outstanding									84,918	86,490	107,274
Denominator for Two-Class Method-Diluted									29,768,021	29,733,721	29,083,893
Earnings per common share-basic (dollars per share)									$ 1.95	$ 1.70	$ 1.18
Earnings per common share-diluted (shares)	$ 0.49	$ 0.49	$ 0.49	$ 0.47	$ 0.40	$ 0.41	$ 0.47	$ 0.41	$ 1.95	$ 1.70	$ 1.18
Exercise price of warrants (dollars per share)	$ 31.53								$ 31.53
Warrants [Member]
Denominators:
Anti-dilutive excluded from dilutive potential common shares									517,012	517,012	517,012
Stock Options [Member]
Denominators:
Anti-dilutive excluded from dilutive potential common shares									419,538	619,418	747,443
Restricted Stock [Member]
Denominators:
Anti-dilutive excluded from dilutive potential common shares									59,297	51,169	75,012

XML

Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Composition of Short-Term Borrowings, Interest Expense and Weighted Average Interest Rate

The following table represents the composition of short-term borrowings, the weighted average interest rate as of December 31 and interest expense for the years ended December 31:

	2014						2013						2012
(dollars in thousands)	Balance		Weighted Average Interest Rate		Interest Expense		Balance		Weighted Average Interest Rate		Interest Expense		Balance		Weighted Average Interest Rate		Interest Expense
REPOs	$	30,605	0.01	%	$	3	$	33,847	0.01	%	$	62	$	62,582	0.20	%	$	82
FHLB advances	290,000		0.31	%	511		140,000		0.30	%	279		75,000		0.19	%	123
Total Short-term Borrowings	$	320,605	0.27	%	$	514	$	173,847	0.24	%	$	341	$	137,582	0.19	%	$	205

XML

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

S&T Bancorp, Inc., or S&T, was incorporated on March 17, 1983 under the laws of the Commonwealth of Pennsylvania as a bank holding company and has three wholly owned subsidiaries, S&T Bank, 9th Street Holdings, Inc. and STBA Capital Trust I. We own a one-half interest in Commonwealth Trust Credit Life Insurance Company, or CTCLIC.

We are presently engaged in nonbanking activities through the following five entities: 9th Street Holdings, Inc.; S&T Bancholdings, Inc.; CTCLIC; S&T Insurance Group, LLC and Stewart Capital Advisors, LLC. 9th Street Holdings, Inc. and S&T Bancholdings, Inc. are investment holding companies. CTCLIC, which is a joint venture with another financial institution, acts as a reinsurer of credit life, accident and health insurance policies sold by S&T Bank and the other institution. S&T Insurance Group, LLC, through its subsidiaries, offers a variety of insurance products. Stewart Capital Advisors, LLC is a registered investment advisor that manages private investment accounts for individuals and institutions and advises the Stewart Capital Mid Cap Fund.

On March 9, 2012 we completed the acquisition and conversion of Mainline Bancorp, Inc., or Mainline, a bank holding company based in Ebensburg, Pennsylvania. Mainline had one subsidiary, Mainline National Bank, with eight branches and $129.5 million in loans and $206.0 million in deposits. The acquisition expanded our market share and footprint throughout Cambria and Blair counties of western Pennsylvania. The total acquisition cost of Mainline was $27.8 million.

On August 13, 2012, we completed the acquisition of Gateway Bank of Pennsylvania, a bank with $99.1 million in loans and $105.4 million in deposits, headquartered in McMurray, Pennsylvania. The total acquisition cost of Gateway Bank was $19.8 million. As of December 31, 2012, Gateway was operating as a separate wholly-owned subsidiary of S&T, with all transactions since the acquisition date consolidated in our financial statements. On February 8, 2013, Gateway Bank was merged into S&T Bank, and their two branches are now fully operational branches of S&T Bank.

On October 29, 2014, S&T and Integrity Bancshares, Inc., or Integrity, based in Camp Hill, Pennsylvania with eight branches and approximately $860 million in assets as of September 2014, entered into a definitive Agreement and Plan of Merger of Integrity with and into S&T. The transaction, valued at approximately $155 million, is expected to close in the first quarter of 2015, after satisfaction of customary closing conditions. As soon as practicable following the merger, Integrity Bank, a Pennsylvania state-chartered bank subsidiary of Integrity, will be merged with and into S&T Bank with S&T Bank continuing as the surviving bank. The bank merger is expected to close in the second quarter of 2015. However, for a period of at least three years following the merger, S&T Bank intends to operate bank branches in the markets currently served by Integrity Bank using the name "Integrity Bank - A Division of S&T Bank".

Accounting Policies

Our financial statements have been prepared in accordance with U. S. generally accepted accounting principles, or GAAP. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the dates of the balance sheets and revenues and expenses for the periods then ended. Actual results could differ from those estimates. Our significant accounting policies are described below.

Principles of Consolidation

The Consolidated Financial Statements include the accounts of S&T and its wholly owned subsidiaries. All significant intercompany transactions have been eliminated in consolidation. Investments of 20 percent to 50 percent of the outstanding common stock of investees are accounted for using the equity method of accounting.

Reclassification

Certain amounts in prior years’ financial statements and footnotes have been reclassified to conform to the current year’s presentation. The reclassifications had no significant effect on our results of operations or financial condition.

Business Combinations

We account for business combinations using the acquisition method of accounting. Under this method of accounting, the acquired company’s net assets are recorded at fair value at the date of acquisition, and the results of operations of the acquired company are combined with our results from that date forward. Acquisition costs are expensed when incurred. The difference between the purchase price and the fair value of the net assets acquired (including identified intangibles) is recorded as goodwill.

Fair Value Measurements

We use fair value measurements when recording and disclosing certain financial assets and liabilities. Securities available-for-sale, trading assets and derivatives are recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record other assets at fair value on a nonrecurring basis, such as loans held for sale, impaired loans, other real estate owned, or OREO, mortgage servicing rights, or MSRs, and certain other assets.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants at the measurement date. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities; it is not a forced transaction. In determining fair value, we use various valuation approaches, including market, income and cost approaches. The fair value standard establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing an asset or liability, which is developed, based on market data we have obtained from independent sources. Unobservable inputs reflect our estimates of assumptions that market participants would use in pricing an asset or liability, which are developed based on the best information available in the circumstances.

The fair value hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The fair value hierarchy is broken down into three levels based on the reliability of inputs as follows:

Level 1: valuation is based upon unadjusted quoted market prices for identical instruments traded in active markets.

Level 2: valuation is based upon quoted market prices for similar instruments traded in active markets, quoted market prices for identical or similar instruments traded in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by market data.

Level 3: valuation is derived from other valuation methodologies, including discounted cash flow models and similar techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in determining fair value.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Our policy is to recognize transfers between any of the fair value hierarchy levels at the end of the reporting period in which the transfer occurred.

The following are descriptions of the valuation methodologies that we use for financial instruments recorded at fair value on either a recurring or nonrecurring basis.

Recurring Basis

Securities Available-for-Sale

Securities available-for-sale include both debt and equity securities. We obtain fair values for debt securities from a third-party pricing service which utilizes several sources for valuing fixed-income securities. We validate prices received from our pricing service through comparison to a secondary pricing service and broker quotes. We review the methodologies of the pricing service which provides us with a sufficient understanding of the valuation models, assumptions, inputs and pricing to reasonably measure the fair value of our securities. The market evaluation sources for debt securities include observable inputs rather than significant unobservable inputs and are classified as Level 2. The service provider utilizes pricing models that vary by asset class and include available trade, bid and other market information. Generally, the methodologies include broker quotes, proprietary models, and vast descriptive terms and conditions databases, as well as extensive quality control programs.

Marketable equity securities that have an active, quotable market are classified as Level 1. Marketable equity securities that are quotable, but are thinly traded or inactive, are classified as Level 2 and securities that are not readily traded and do not have a quotable market are classified as Level 3.

Trading Assets

We use quoted market prices to determine the fair value of our trading assets. Our trading assets are held in a Rabbi Trust under a deferred compensation plan and are invested in readily quoted mutual funds. Accordingly, these assets are classified as Level 1.

Derivative Financial Instruments

We use derivative instruments, including interest rate swaps for commercial loans with our customers, interest rate lock commitments and the sale of mortgage loans in the secondary market. We calculate the fair value for derivatives using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. Each valuation considers the contractual terms of the derivative, including the period to maturity, and uses observable market based inputs, such as interest rate curves and implied volatilities. Accordingly, derivatives are classified as Level 2. We incorporate credit valuation adjustments into the valuation models to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in calculating fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements and collateral postings.

Nonrecurring Basis

Loans Held for Sale

Loans held for sale consist of 1-4 family residential loans originated for sale in the secondary market and, from time to time, certain loans transferred from the loan portfolio to loans held for sale, all of which are carried at the lower of cost or fair value. The fair value of 1-4 family residential loans is based on the principal or most advantageous market currently offered for similar loans using observable market data. The fair value of the loans transferred from the loan portfolio is based on the amounts offered for these loans in currently pending sales transactions. Loans held for sale carried at fair value are classified as Level 3.

Impaired Loans

Impaired loans are carried at the lower of carrying value or fair value. Fair value is determined as the recorded investment balance less any specific reserve. We establish a specific reserve based on the following three impairment methods: 1) the present value of expected future cash flows discounted at the loan’s original effective interest rate, 2) the loan’s observable market price or 3) the fair value of the collateral less estimated selling costs when the loan is collateral dependent and we expect to liquidate the collateral. However, if repayment is expected to come from the operation of the collateral, rather than liquidation, then we do not consider estimated selling costs in determining the fair value of the collateral. Collateral values are generally based upon appraisals by approved, independent state certified appraisers. Appraised values may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or our knowledge of the borrower and the borrower’s business. Impaired loans carried at fair value are classified as Level 3.

OREO and Other Repossessed Assets

OREO and other repossessed assets obtained in partial or total satisfaction of a loan are recorded at the lower of recorded investment in the loan or fair value less cost to sell. Subsequent to foreclosure, these assets are carried at the lower of the amount recorded at acquisition date or fair value less cost to sell. Accordingly, it may be necessary to record nonrecurring fair value adjustments. Fair value, when recorded, is generally based upon appraisals by approved, independent state certified appraisers. Like impaired loans, appraisals on OREO may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or other information available to us. OREO and other repossessed assets carried at fair value are classified as Level 3.

Mortgage Servicing Rights

The fair value of MSRs is determined by calculating the present value of estimated future net servicing cash flows, considering expected mortgage loan prepayment rates, discount rates, servicing costs and other economic factors, which are determined based on current market conditions. The expected rate of mortgage loan prepayments is the most significant factor driving the value of MSRs. MSRs are considered impaired if the carrying value exceeds fair value. The valuation model includes significant unobservable inputs; therefore, MSRs are classified as Level 3.

Other Assets

We measure certain other assets at fair value on a nonrecurring basis. Fair value is based on the application of lower of cost or fair value accounting, or write-downs of individual assets. Valuation methodologies used to measure fair value are consistent with overall principles of fair value accounting and consistent with those described above.

Financial Instruments

In addition to financial instruments recorded at fair value in our financial statements, fair value accounting guidance requires disclosure of the fair value of all of an entity’s assets and liabilities that are considered financial instruments. The majority of our assets and liabilities are considered financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and willing seller engaged in an exchange transaction. Also, it is our general practice and intent to hold our financial instruments to maturity and to not engage in trading or sales activities with respect to such financial instruments. For fair value disclosure purposes, we substantially utilize the fair value measurement criteria as required and explained above. In cases where quoted fair values are not available, we use present value methods to determine the fair value of our financial instruments.

Cash and Cash Equivalents

The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks, including interest-bearing deposits, approximate fair value.

Loans

The fair value of variable rate performing loans that may reprice frequently at short-term market rates is based on carrying values adjusted for credit risk. The fair value of variable rate performing loans that reprice at intervals of one year or longer, such as adjustable rate mortgage products, is estimated using discounted cash flow analyses that utilize interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of fixed rate performing loans is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of nonperforming loans is based on their carrying values less any specific reserve. The carrying amount of accrued interest approximates fair value.

Bank Owned Life Insurance

Fair value approximates net cash surrender value of bank owned life insurance, or BOLI.

Deposits

The fair values disclosed for deposits without defined maturities (e.g., noninterest and interest-bearing demand, money market and savings accounts) are by definition equal to the amounts payable on demand. The carrying amounts for variable rate, fixed-term time deposits approximate their fair values. Estimated fair values for fixed rate and other time deposits are based on discounted cash flow analysis using interest rates currently offered for time deposits with similar terms. The carrying amount of accrued interest approximates fair value.

Short-Term Borrowings

The carrying amounts of securities sold under repurchase agreements and other short-term borrowings approximate their fair values.

Long-Term Borrowings

The fair values disclosed for fixed rate long-term borrowings are determined by discounting their contractual cash flows using current interest rates for long-term borrowings of similar remaining maturities. The carrying amounts of variable rate long-term borrowings approximate their fair values.

Junior Subordinated Debt Securities

The variable rate junior subordinated debt securities reprice quarterly; therefore, the fair values approximate the carrying values.

Loan Commitments and Standby Letters of Credit

Off-balance sheet financial instruments consist of commitments to extend credit and letters of credit. Except for interest rate lock commitments, estimates of the fair value of these off-balance sheet items are not made because of the short-term nature of these arrangements and the credit standing of the counterparties.

Other

Estimates of fair value are not made for items that are not defined as financial instruments, including such items as our core deposit intangibles and the value of our trust operations.

Cash and Cash Equivalents

We consider cash and due from banks, interest-bearing deposits with banks and federal funds sold as cash and cash equivalents.

Securities

We determine the appropriate classification of securities at the time of purchase. All securities, including both debt and equity securities, are classified as available-for-sale. These are securities that we intend to hold for an indefinite period of time, but that may be sold in response to changes in interest rates, prepayment risk, liquidity needs or other factors. Such securities are carried at fair value with net unrealized gains and losses deemed to be temporary, reported as a component of other comprehensive income (loss), net of tax. Realized gains and losses on the sale of available-for-sale securities and other-than-temporary impairment, or OTTI, charges are recorded within noninterest income in the Consolidated Statements of Net Income. Realized gains and losses on the sale of securities are determined using the specific-identification method. Bond premiums are amortized to the call date and bond discounts are accreted to the maturity date, both on a level yield basis.

An investment security is considered impaired if its fair value is less than its cost or amortized cost basis. We perform a quarterly review of our securities to identify those that may indicate an OTTI. Our policy for OTTI within the marketable equity securities portfolio generally requires an impairment charge when the security is in a loss position for 12 consecutive months, unless facts and circumstances would suggest the need for an OTTI prior to that time. Our policy for OTTI within the debt securities portfolio is based upon a number of factors, including but not limited to, the length of time and extent to which the estimated fair value has been less than cost, the financial condition of the underlying issuer, the ability of the issuer to meet contractual obligations, the best estimate of the impairment charge representing credit losses, the likelihood of the security’s ability to recover any decline in its estimated fair value and whether management intends to sell the security or if it is more likely than not that management will be required to sell the investment security prior to the security’s recovery. If the impairment is considered other-than-temporary based on management’s review, the impairment must be separated into credit and non-credit components. The credit component is recognized in the Consolidated Statements of Net Income and the non-credit component is recognized in other comprehensive income (loss), net of applicable taxes.

Loans Held for Sale

Loans held for sale consist of 1-4 family residential loans originated for sale in the secondary market and from time to time, certain loans transferred from the loan portfolio to loans held for sale, all of which are carried at the lower of cost or fair value. If a loan is transferred from the loan portfolio to the held-for-sale category, any write-down in the carrying amount of the loan at the date of transfer is recorded as a charge-off against the allowance for loan losses, or ALL. Subsequent declines in fair value are recognized as a charge to noninterest income. When a loan is placed in the held-for-sale category, we stop amortizing the related deferred fees and costs. The remaining unamortized fees and costs are recognized as part of the cost basis of the loan at the time it is sold. Gains and losses on sales of loans held for sale are included in other noninterest income in the Consolidated Statements of Net Income.

Loans

Loans are reported at the principal amount outstanding net of unearned income, unamortized premiums or discounts and deferred origination fees and costs. We defer certain nonrefundable loan origination and commitment fees. Accretion of discounts and amortization of premiums on loans are included in interest income in the Consolidated Statements of Net Income. Loan origination fees and direct loan origination costs are deferred and amortized as an adjustment of loan yield over the respective lives of the loans without consideration of anticipated prepayments. If a loan is paid off, the remaining unaccreted or unamortized net origination fees and costs are immediately recognized into income or expense. Interest is accrued and interest income is recognized on loans as earned.

Closed-end installment loans, amortizing loans secured by real estate and any other loans with payments scheduled monthly are reported past due when the borrower is in arrears two or more monthly payments. Other multi-payment obligations with payments scheduled other than monthly are reported past due when one scheduled payment is due and unpaid for 30 days or more.

Generally, consumer loans are charged off against the ALL upon the loan reaching 90 days past due. Commercial loans are charged off as management becomes aware of facts and circumstances that raise doubt as to the collectability of all or a portion of the principal and when we believe a confirmed loss exists.

Nonaccrual or Nonperforming Loans

We stop accruing interest on a loan (nonaccrual loan) when the borrower’s payment is 90 days past due. Loans are also placed on nonaccrual status when payment is not past due, but we have doubt about the borrower’s ability to comply with contractual repayment terms. When the interest accrual is discontinued, all unpaid accrued interest is reversed against interest income. Interest income is recognized on nonaccrual loans on a cash basis if recovery of the remaining principal is reasonably assured. As a general rule, a nonaccrual loan may be restored to accrual status when its principal and interest is paid current and the bank expects repayment of the remaining contractual principal and interest, or when the loan otherwise becomes well secured and in the process of collection.

Troubled Debt Restructurings

Troubled debt restructurings, or TDRs, are loans where we, for economic or legal reasons related to a borrower’s financial difficulty, grant a concession to the borrower that we would not otherwise grant. We strive to identify borrowers in financial difficulty early and work with them to modify the terms before their loan reaches nonaccrual status. These modified terms generally include extensions of maturity dates at a stated interest rate lower than the current market rate for a new loan with similar risk characteristics, reductions in contractual interest rates or principal deferment. While unusual, there may be instances of principal forgiveness. These modifications are generally for longer term periods that would not be considered insignificant. Additionally, we classify loans where the debt obligation has been discharged through a Chapter 7 Bankruptcy and not reaffirmed as TDRs.

We individually evaluate all substandard commercial loans that experienced a forbearance or change in terms agreement, as well as all substandard consumer and residential mortgage loans that entered into an agreement to modify their existing loan to determine if they should be designated as TDRs.

All TDRs will be reported as impaired loans for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. Further, all impaired loans are reported as nonaccrual loans unless the loan is a TDR that has met the requirements to be returned to accruing status. TDRs can be returned to accruing status if the ultimate collectability of all contractual amounts due, according to the restructured agreement, is not in doubt and there is a period of a minimum of six months of satisfactory payment performance by the borrower either immediately before or after the restructuring.

Allowance for Loan Losses

The ALL reflects our estimates of probable losses inherent in the loan portfolio at the balance sheet date. The methodology for determining the ALL has two main components: evaluation and impairment tests of individual loans and evaluation and impairment tests of certain groups of homogeneous loans with similar risk characteristics.

A loan is considered impaired when it is probable that we will be unable to collect all principal and interest payments due according to the original contractual terms of the loan agreement. We individually evaluate all substandard and nonaccrual commercial loans greater than $0.5 million for impairment. All TDRs will be reported as an impaired loan for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. For all TDRs, regardless of size, as well as all other impaired loans, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate. Specific reserves are established based upon the following three impairment methods: 1) the present value of expected future cash flows discounted at the loan’s original effective interest rate, 2) the loan’s observable market price or 3) the estimated fair value of the collateral if the loan is collateral dependent. Our impairment evaluations consist primarily of the fair value of collateral method because most loans are collateral dependent. Collateral values are discounted to consider disposition costs when appropriate. A specific reserve is established or a charge-off is taken if the fair value of the impaired loan is less than the recorded investment in the loan balance.

The ALL for homogeneous loans is calculated using a systematic methodology with both a quantitative and a qualitative analysis that is applied on a quarterly basis. The ALL model is comprised of five distinct portfolio segments: 1) Commercial Real Estate, or CRE, 2) Commercial and Industrial, or C&I, 3) Commercial Construction, 4) Consumer Real Estate and 5) Other Consumer. Each segment has a distinct set of risk characteristics monitored by management. We further assess and monitor risk and performance at a more disaggregated level which includes our internal risk rating system for the commercial segments and type of collateral, lien position and loan-to-value, or LTV, for the consumer segments.

We first apply historical loss rates to pools of loans with similar risk characteristics. Loss rates are calculated by historical charge-offs that have occurred within each pool of loans over the loss emergence period, or LEP. The LEP is an estimate of the average amount of time from the point at which a loss is incurred on a loan to the point at which the loss is confirmed. In general, the LEP will be shorter in an economic slowdown or recession and longer during times of economic stability or growth, as customers are better able to delay loss confirmation after a potential loss event has occurred.

In conjunction with our annual review of the ALL assumptions, we have updated our study of LEPs for our commercial portfolio segments using our loan charge-off history. Our study showed that the LEP for our commercial construction portfolio has lengthened and that our current estimated LEPs for the CRE and C&I portfolio segments did not materially change.We estimate the LEP to be 3.5 years for CRE and commercial construction and 2.5 years for C&I. This is an increase from the prior LEP of 1.5 years for commercial construction.We believe that the LEPs for the consumer portfolio segments have also lengthened as they are influenced by the same improvement in economic conditions that has impacted the commercial portfolio segments over the past two years. We therefore also lengthened the LEP assumption for the consumer portfolio to 2.0 years. This is an increase from prior LEPs of 1.5 years for the consumer portfolio segment.

Another key assumption is the look-back period, or LBP, which represents the historical data period utilized to calculate loss rates. We lengthened the LBP for C&I, Commercial Construction and the consumer loan portfolio segments in order to capture relevant historical data believed to be reflective of losses inherent in the portfolios. We use a five and one quarter years LBP for our commercial portfolio segments and three and one quarter years LBP for our consumer portfolio segments.

After consideration of the historic loss calculations, management applies additional qualitative adjustments so that the ALL is reflective of the inherent losses that exist in the loan portfolio at the balance sheet date. Qualitative adjustments are made based upon changes in economic conditions, loan portfolio and asset quality data and credit process changes, such as credit policies or underwriting standards. The evaluation of the various components of the ALL requires considerable judgment in order to estimate inherent loss exposures.

The changes made to the ALL assumptions were applied prospectively and did not result in a material change to the total ALL. Lengthening the LEPs does increase the historical loss rates and therefore the quantitative component of the ALL. We believe this makes the quantitative component of the ALL more reflective of inherent losses that exist within the loan portfolio, which resulted in a decrease in the qualitative component of the ALL. The ALL at December 31, 2014 reflects these changes within the C&I, Commercial Construction and consumer portfolio segments.

Qualitative adjustments are aggregated into five categories, including process, economic conditions, loan portfolio, asset quality and other external factors.

Within the five aforementioned categories, the following qualitative factors are considered:

1) Changes in our lending policies and procedures, including underwriting standards, collection, charge-off and recovery practices not considered elsewhere in estimating credit losses;

2) Changes in national, regional, and local economic and business conditions and developments that affect the collectability of the portfolio, including the condition of various market segments;

3) Changes in the nature and volume of our loan portfolio and terms of loans;

4) Changes in the experience, ability and depth of our lending management and staff;

5) Changes in the volume and severity of past due loans, the volume of nonaccrual loans, and the volume and severity of adversely classified or graded loans;

6) Changes in the quality of our loan review system;

7) Changes in the value of the underlying collateral for collateral-dependent loans;

8) The existence and effect of any concentrations of credit and changes in the level of such concentrations; and

9) The effect of external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in our current loan portfolio.

Our ALL Committee meets quarterly to verify the overall adequacy of the ALL. Additionally, on an annual basis, the ALL Committee meets to validate our ALL model. This validation includes reviewing the pools of loans to ensure the segmentation results in relevant homogeneous pools of loans. The ALL Committee reviews the LEP and LBP used to calculate the loss rates. Further, the ALL Committee reviews the qualitative factors to ensure that both the categories, as noted above, and the range of qualitative adjustments remain appropriate. As a result of this ongoing monitoring process, we may make changes to our ALL assumptions to be responsive to the economic environment.

Bank Owned Life Insurance

We have purchased life insurance policies on certain executive officers and employees. We receive the cash surrender value of each policy upon its termination or benefits are payable upon the death of the insured. Changes in net cash surrender value are recognized in noninterest income or expense in the Consolidated Statements of Net Income.

Premises and Equipment

Premises and equipment, including leasehold improvements, are stated at cost less accumulated depreciation. Maintenance and repairs are charged to expense as incurred, while improvements that extend an asset’s useful life are capitalized and depreciated over the estimated remaining life of the asset. Depreciation expense is computed by the straight-line method for financial reporting purposes and accelerated methods for income tax purposes over the estimated useful lives of the particular assets. Management reviews long-lived assets using events and circumstances to determine if and when an asset is evaluated for recoverability.

The estimated useful lives for the various asset categories are as follows:

1) Land and Land Improvements	Non-depreciating assets
2)     Buildings	25 years
3)     Furniture and Fixtures	5 years
4)     Computer Equipment and Software	5 years or term of license
5)     Other Equipment	5 years
6)     Vehicles	5 years
7)     Leasehold Improvements	Lesser of estimated useful life of the asset (generally 15 years unless established otherwise) or the remaining term of the lease, including renewal options in the lease that are reasonably assured of exercise

Restricted Investment in Bank Stock

Federal Home Loan Bank, or FHLB, stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. We hold FHLB stock because we are a member of the FHLB of Pittsburgh. The FHLB requires members to purchase and hold a specified level of FHLB stock based upon on the members asset value, level of borrowings and participation in other programs offered. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the low-cost products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of the FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value. Both cash and stock dividends are reported as income in taxable investment securities in the Consolidated Statements of Net Income. FHLB stock is evaluated for OTTI on a quarterly basis.

Atlantic Community Bankers’ Bank, or ACBB, stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the carrying value. We do not currently use their membership products and services. We acquired ACBB stock through various mergers of banks that were ACBB members. ACBB stock is evaluated for OTTI on a quarterly basis.

Goodwill and Other Intangible Assets

We have three reporting units: Community Banking, Insurance and Wealth Management. At December 31, 2014, we had goodwill of $175.8 million, including $171.6 million in Community Banking, representing 98 percent of total goodwill and $4.2 million in Insurance, representing two percent of total goodwill. The carrying value of goodwill is tested annually for impairment each October 1 or more frequently if it is determined that we should do so. We first assess qualitatively whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. Our qualitative assessment considers such factors as macroeconomic conditions, market conditions specifically related to the banking industry, our overall financial performance and various other factors. If we determine that it is more likely than not that the fair value is less than the carrying amount, we proceed to test for impairment. The evaluation for impairment involves comparing the current estimated fair value of each reporting unit to its carrying value, including goodwill. If the current estimated fair value of a reporting unit exceeds its carrying value, no additional testing is required and impairment loss is not recorded. If the estimated fair value of a reporting unit is less than the carrying value, further valuation procedures are performed and could result in impairment of goodwill being recorded. Further valuation procedures would include allocating the estimated fair value to all assets and liabilities of the reporting unit to determine an implied goodwill value. If the implied value of goodwill of a reporting unit is less than the carrying amount of that goodwill, an impairment loss is recognized in an amount equal to that excess.

We have core deposit and other intangible assets resulting from acquisitions which are subject to amortization. We determine the amount of identifiable intangible assets based upon independent core deposit and insurance contract analyses at the time of the acquisition. Intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable.

Variable Interest Entities

Variable interest entities, or VIEs, are legal entities that generally either do not have equity investors with voting rights or that have equity investors that do not provide sufficient financial resources for the entity to support its activities. When an enterprise has both the power to direct the economic activities of the VIE and the obligation to absorb losses of the VIE or the right to receive benefits of the VIE, the entity has a controlling financial interest in the VIE. A VIE often holds financial assets, including loans or receivables, or other property. The company with a controlling financial interest, the primary beneficiary, is required to consolidate the VIE into its consolidated balance sheets. S&T has one wholly-owned trust subsidiary, STBA Capital Trust I, or the Trust, for which it does not absorb a majority of expected losses or receive a majority of the expected residual returns. At its inception in 2008, the Trust issued floating rate trust preferred securities to the Trustee, another financial institution, and used the proceeds from the sale to invest in junior subordinated debt, which is the sole asset of the Trust. The Trust pays dividends on the trust preferred securities at the same rate as the interest we pay on our junior subordinated debt held by the Trust. Because the third-party investors are the primary beneficiaries, the Trust qualifies as a VIE. Accordingly, the Trust and its net assets are not included in our Consolidated Financial Statements. However, the junior subordinated debt issued by S&T is included in our Consolidated Balance Sheets.

Joint Ventures

We have made investments directly in Low Income Housing Tax Credit, or LIHTC, partnerships formed with third parties. As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties. These investments are amortized over a maximum of 10 years, which represents the period that the tax credits will be utilized. We have determined that we are not the primary beneficiary of these investments because the general partners have the power to direct the activities that most significantly impact the economic performance of the partnership and have both the obligation to absorb expected losses and the right to receive benefits.

OREO and Other Repossessed Assets

OREO and other repossessed assets are included in other assets in the Consolidated Balance Sheets and are comprised of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of a foreclosure. At the time of foreclosure, these properties are recorded at the lower of the recorded investment in the loan or fair value less cost to sell. Loan losses arising from the acquisition of such property initially are charged against the ALL. Subsequently, these assets are carried at the lower of carrying value or current fair value less cost to sell. Gains or losses realized upon disposition of the asset are recorded in other expenses in the Consolidated Statements of Net Income.

Mortgage Servicing Rights

MSRs are recognized as separate assets when commitments to fund a loan to be sold are made. Upon commitment, the MSR is established, which represents the then current estimated fair value of future net cash flows expected to be realized for performing the servicing activities. The estimated fair value of the MSRs is estimated by calculating the present value of estimated future net servicing cash flows, considering expected mortgage loan prepayment rates, discount rates, servicing costs and other economic factors, which are determined based on current market conditions. The expected rate of mortgage loan prepayments is the most significant factor driving the value of MSRs. Increases in mortgage loan prepayments reduce estimated future net servicing cash flows because the life of the underlying loan is reduced. In determining the estimated fair value of MSRs, mortgage interest rates, which are used to determine prepayment rates, are held constant over the estimated life of the portfolio. MSRs are reported in other assets in the Consolidated Balance Sheets and are amortized into noninterest income in the Consolidated Statements of Net Income in proportion to, and over the period of, the estimated future net servicing income of the underlying mortgage loans.

MSRs are regularly evaluated for impairment based on the estimated fair value of those rights. The MSRs are stratified by certain risk characteristics, primarily loan term and note rate. If temporary impairment exists within a risk stratification tranche, a valuation allowance is established through a charge to income equal to the amount by which the carrying value exceeds the estimated fair value. If it is later determined that all or a portion of the temporary impairment no longer exists for a particular tranche, the valuation allowance is reduced.

MSRs are also reviewed for OTTI. OTTI exists when the recoverability of a recorded valuation allowance is determined to be remote, taking into consideration historical and projected interest rates and loan pay-off activity. When this situation occurs, the unrecoverable portion of the valuation allowance is applied as a direct write-down to the carrying value of the MSR. Unlike a valuation allowance, a direct write-down permanently reduces the carrying value of the MSR and the valuation allowance, precluding subsequent recoveries.

Derivative Financial Instruments

Interest Rate Swaps

In accordance with applicable accounting guidance for derivatives and hedging, all derivatives are recognized as either assets or liabilities on the balance sheet at fair value. Interest rate swaps are contracts in which a series of interest rate flows (fixed and variable) are exchanged over a prescribed period. The notional amounts on which the interest payments are based are not exchanged. These derivative positions relate to transactions in which we enter into an interest rate swap with a commercial customer while at the same time entering into an offsetting interest rate swap with another financial institution. In connection with each transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a same notional amount at a fixed rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert a variable rate loan to a fixed rate loan with us receiving a variable rate. These agreements could have floors or caps on the contracted interest rates.

Pursuant to our agreements with various financial institutions, we may receive collateral or may be required to post collateral based upon mark-to-market positions. Beyond unsecured threshold levels, collateral in the form of cash or securities may be made available to counterparties of interest rate swap transactions. Based upon our current positions and related future collateral requirements relating to them, we believe any effect on our cash flow or liquidity position to be immaterial.

Derivatives contain an element of credit risk, the possibility that we will incur a loss because a counterparty, which may be a financial institution or a customer, fails to meet its contractual obligations. All derivative contracts with financial institutions may be executed only with counterparties approved by our Asset and Liability Committee, or ALCO, and derivatives with customers may only be executed with customers within credit exposure limits approved by our Senior Loan Committee. Interest rate swaps are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives are recorded in current earnings and included in other noninterest income in the Consolidated Statements of Net Income.

Interest Rate Lock Commitments and Forward Sale Contracts

In the normal course of business, we sell originated mortgage loans into the secondary mortgage loan market. We also offer interest rate lock commitments to potential borrowers. The commitments are generally for a period of 60 days and guarantee a specified interest rate for a loan if underwriting standards are met, but the commitment does not obligate the potential borrower to close on the loan. Accordingly, some commitments expire prior to becoming loans. We can encounter pricing risks if interest rates increase significantly before the loan can be closed and sold. We may utilize forward sale contracts in order to mitigate this pricing risk. Whenever a customer desires these products, a mortgage originator quotes a secondary market rate guaranteed for that day by the investor. The rate lock is executed between the mortgagee and us and in turn a forward sale contract may be executed between us and the investor. Both the rate lock commitment and the corresponding forward sale contract for each customer are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives during the commitment period are recorded in current earnings and included in mortgage banking in the Consolidated Statements of Net Income.

Allowance for Unfunded Commitments

In the normal course of business, we offer off-balance sheet credit arrangements to enable our customers to meet their financing objectives. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. Our exposure to credit loss, in the event the customer does not satisfy the terms of the agreement, equals the contractual amount of the obligation less the value of any collateral. We apply the same credit policies in making commitments and standby letters of credit that are used for the underwriting of loans to customers. Commitments generally have fixed expiration dates, annual renewals or other termination clauses and may require payment of a fee. Because many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The allowance for unfunded commitments is included in other liabilities in the Consolidated Balance Sheets. The allowance for unfunded commitments is determined using a similar methodology as our ALL. The reserve is calculated by applying historical loss rates from our ALL model to the estimated future utilization of our unfunded commitments.

Treasury Stock

The repurchase of our common stock is recorded at cost. At the time of reissuance, the treasury stock account is reduced using the average cost method. Gains and losses on the reissuance of common stock are recorded in additional paid-in capital, to the extent additional paid-in capital from previous treasury share transactions exists. Any deficiency is charged to retained earnings.

Revenue Recognition

We recognize revenues as they are earned based on contractual terms or as services are provided when collectability is reasonably assured. Our principal source of revenue is interest income, which is recognized on an accrual basis. Interest and dividend income, loan fees, trust fees, fees and charges on deposit accounts, insurance commissions and other ancillary income related to our deposits and lending activities are accrued as earned.

Wealth Management Fees

Assets held in a fiduciary capacity by the subsidiary bank, S&T Bank, are not our assets and are therefore not included in our Consolidated Financial Statements. Wealth management fee income is reported in the Consolidated Statements of Net Income on an accrual basis.

Stock-Based Compensation

Stock-based compensation may include stock options and restricted stock which is measured using the fair value method of accounting. The grant date fair value is recognized over the period during which the recipient is required to provide service in exchange for the award. Stock option expense is determined utilizing the Black-Scholes model. Restricted stock expense is determined using the grant date fair value. We estimate expected forfeitures when stock-based awards are granted and record compensation expense only for awards that are expected to vest.

Pensions

The expense for S&T Bank’s qualified and nonqualified defined benefit pension plans is actuarially determined using the projected unit credit actuarial cost method. It requires us to make economic assumptions regarding future interest rates and asset returns as well as various demographic assumptions. We estimate the discount rate used to measure benefit obligations by applying the projected cash flow for future benefit payments to a yield curve of high-quality corporate bonds available in the marketplace and by employing a model that matches bonds to our pension cash flows. The expected return on plan assets is an estimate of the long-term rate of return on plan assets, which is determined based on the current asset mix and estimates of return by asset class. We recognize in the Consolidated Balance Sheets an asset for the plan’s overfunded status or a liability for the plan’s underfunded status. Gains or losses related to changes in benefit obligations or plan assets resulting from experience different from that assumed are recognized as other comprehensive income (loss) in the period in which they occur. To the extent that such gains or losses exceed ten percent of the greater of the projected benefit obligation or plan assets, they are recognized as a component of pension costs over the future service periods of active plan participants. The funding policy for the qualified plan is to contribute an amount each year that is at least equal to the minimum required contribution as determined under the Pension Protection Act of 2006 and Moving Ahead for Progress in the 21st Century Act, but not more than the maximum amount permissible for taxable plan sponsors. Our nonqualified plans are unfunded.

Marketing Costs

We expense all marketing-related costs, including advertising costs, as incurred.

Income Taxes

We estimate income tax expense based on amounts expected to be owed to the tax jurisdictions where we conduct business. On a quarterly basis, management assesses the reasonableness of our effective tax rate based upon our current estimate of the amount and components of net income, tax credits and the applicable statutory tax rates expected for the full year. We classify interest and penalties as an element of tax expense.

Deferred income tax assets and liabilities are determined using the asset and liability method and are reported in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax basis of assets and liabilities and recognizes enacted changes in tax rate and laws. When deferred tax assets are recognized, they are subject to a valuation allowance based on management’s judgment as to whether realization is more likely than not.

Accrued taxes represent the net estimated amount due to taxing jurisdictions and are reported in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. We evaluate and assess the relative risks and appropriate tax treatment of transactions and filing positions after considering statutes, regulations, judicial precedent and other information and maintain tax accruals consistent with the evaluation of these relative risks and merits. Changes to the estimate of accrued taxes occur periodically due to changes in tax rates, interpretations of tax laws, the status of examinations being conducted by taxing authorities and changes to statutory, judicial and regulatory guidance. These changes, when they occur, can affect deferred taxes and accrued taxes, as well as the current period’s income tax expense and can be significant to our operating results.

Tax positions are recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50 percent likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded.

Earnings Per Share

Basic earnings per share, or EPS, is calculated using the two-class method to determine income allocated to common shareholders. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities under the two-class method. Income allocated to common shareholders is then divided by the weighted average number of common shares outstanding during the period. Potentially dilutive securities are excluded from the basic EPS calculation.

Diluted EPS is calculated under the more dilutive of either the treasury stock method or the two-class method. Under the treasury stock method, the weighted average number of common shares outstanding is increased by the potentially dilutive common shares. For the two-class method, diluted EPS is calculated for each class of shareholders using the weighted average number of shares attributed to each class. Potentially dilutive common shares are common stock equivalents relating to our outstanding warrants, stock options and restricted stock.

Recently Adopted Accounting Standards Updates, or ASU

Business Combinations (Topic 805): Pushdown Accounting

In November 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-17, Pushdown Accounting - Business Combinations (Topic 805). The ASU provides an acquired entity with an option to elect to apply pushdown accounting. The amendments of this ASU apply to the separate financial statements of an acquired entity and its subsidiaries that are a business activity upon the occurrence of an event in which an acquirer obtains control of the entity. Pushdown accounting refers to the use of the acquirer's basis in the preparation of the acquiree's separate financial statements. The new standard became effective upon issuance on November 18, 2014. The adoption of this ASU had no impact on our results of operations or financial position.

Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss or a Tax Credit Carryforward Exists

In July 2013, the FASB issued ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss or a Tax Credit Carryforward Exists. The ASU requires that entities should present an unrecognized tax benefit as a reduction of the deferred tax asset for a net operating loss, or NOL, or similar tax loss or tax credit carry forward rather than as a liability when the uncertain tax position would reduce the NOL or other carry forward under the tax law. The new standard is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013, and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. The adoption of this ASU had no impact on our results of operations or financial position.

Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date

In February 2013, the FASB issued ASU No. 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date. The ASU requires the measurement of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement with its co-obligors as well as any additional amount that the entity expects to pay on behalf of its co-obligors. The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2013, and early adoption is permitted. The adoption of this ASU had no impact on our results of operations or financial position.

Recently Issued Accounting Standards Updates not yet Adopted

Share-Based Payment Awards with Performance Targets

In June 2014, the FASB issued ASU No. 2014-12, Share-Based Payment Awards with Performance Targets. The main provisions of ASU 2014-12 require that a performance target included in a share-based payment award that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. Therefore, under the existing stock compensation guidance in Accounting Standards Codification Topic 718, the performance target should not be reflected in estimating the grant-date fair value of the award. The standard is effective for annual periods and interim periods beginning after December 15, 2015. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Repurchase-To-Maturity Transactions, Repurchase Financings and New Disclosures

In June 2014, the FASB issued ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings and New Disclosures to change the accounting for repurchase-to-maturity transactions and certain linked repurchase financings. This will result in accounting for both types of arrangements as secured borrowings on the balance sheet and require new disclosures to (i) increase transparency about the types of collateral pledged in secured borrowing transactions and (ii) enable users to better understand transactions in which the transferor retains substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction. The disclosure for repurchase agreements, securities lending transactions and repurchase-to-maturity transactions accounted for as secured borrowings is required to be presented for annual periods beginning after December 15, 2014, and for interim periods beginning after March 15, 2015. All other accounting and disclosure amendments in the ASU are effective for the first interim or annual period beginning after December 15, 2014. Earlier application for a public business entity is prohibited. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Revenues from Contracts with Customers

In May 2014, the FASB issued ASU No. 2014-09, Revenues from Contracts with Customers. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. The standard is required to be adopted by public business entities in annual periods beginning on or after December 15, 2016 including interim periods therein. The provisions do not apply to lease contracts, insurance contracts, financial instruments and other contractual rights or obligations (e.g. receivables, debt and equity securities, liabilities, debt, derivatives transfers, and servicing, etc.), guarantees, or non-monetary exchanges between entities. We are currently evaluating the impact of the adoption of this pronouncement on our consolidated financial statements; however, we do not expect that this ASU will have a material impact on our results of operations or financial position.

Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity

In April 2014, the FASB issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies related disclosure requirements. The guidance applies to all entities that dispose of components. It will significantly change current practices for assessing discontinued operations and affect an entity’s income and earnings per share from continuing operations. An entity is required to reclassify assets and liabilities of a discontinued operation that are classified as held for sale or disposed of in the current period for all comparative periods presented. The ASU requires that an entity present in the statement of cash flows or disclose in a note either total operating and investing cash flows for discontinued operations, or depreciation, amortization, capital expenditures and significant operating and investing noncash items related to discontinued operations. Additional disclosures are required when an entity retains significant continuing involvement with a discontinued operation after its disposal, including the amount of cash flows to and from a discontinued operation. The new standard applies prospectively effective for annual periods beginning on or after December 15, 2014 and interim periods therein, and early adoption is permitted. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure

In January 2014, the FASB issued ASU No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. The ASU clarifies that an in substance repossession or foreclosure has occurred and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure. Interim and annual disclosure is required of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The new standard is effective using either the modified retrospective transition method or a prospective transition method for fiscal years and interim periods within those years, beginning after December 15, 2014, and early adoption is permitted. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Accounting for Investments in Qualified Affordable Housing Projects

In January 2014, the FASB issued ASU No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. The ASU permits reporting entities to make an accounting policy election to account for investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. The proportional amortization method permits the amortization of the initial cost of the investment in proportion to the tax credits and other tax benefits received, and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2014, and early adoption is permitted. We do not expect that this ASU will have a material impact on our results of operations or financial position.

XML

Selected Financial Data - Summary of Selected Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 41,381	$ 40,605	$ 39,872	$ 38,665	$ 38,779	$ 38,581	$ 38,553	$ 37,843	$ 160,523	$ 153,756	$ 156,251
Interest expense	3,315	3,076	3,017	3,074	3,125	3,307	3,957	4,174	12,481	14,563	21,024
Provision for loan losses	1,106	1,454	(1,134)	289	1,562	3,419	1,023	2,307	1,715	8,311	22,815
Net Interest Income After Provision for Loan Losses	36,960	36,075	37,989	35,302	34,092	31,855	33,573	31,362	146,327	130,882	112,412
Security gains, net	0	0	40	1	0	3	0	2
Noninterest income	11,220	11,931	11,731	11,415	11,312	12,539	12,867	14,804	46,338	51,527	51,912
Noninterest expense	29,720	28,440	30,165	28,914	29,447	27,943	28,386	31,616	117,240	117,392	122,863
Income before taxes	18,460	19,566	19,595	17,804	15,957	16,454	18,054	14,552
Provision for income taxes	3,963	4,906	4,875	3,771	4,098	4,207	3,951	2,222	17,515	14,478	7,261
Net Income Available to Common Shareholders	$ 14,497	$ 14,660	$ 14,720	$ 14,033	$ 11,859	$ 12,247	$ 14,103	$ 12,330	$ 57,745	$ 50,392	$ 34,074
Common earnings per share-diluted (shares)	$ 0.49	$ 0.49	$ 0.49	$ 0.47	$ 0.40	$ 0.41	$ 0.47	$ 0.41	$ 1.95	$ 1.70	$ 1.18
Dividends declared per common share (dollars per share)	$ 0.18	$ 0.17	$ 0.17	$ 0.16	$ 0.16	$ 0.15	$ 0.15	$ 0.15	$ 0.68	$ 0.61	$ 0.60
Common book value (dollars per share)	$ 20.42	$ 20.33	$ 20.04	$ 19.64	$ 19.21	$ 18.68	$ 18.39	$ 18.32

XML

Income Taxes - Schedule of Significant Components of Temporary Differences with Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Tax Liabilities:
Net unrealized holding gains on securities available-for-sale	$ (3,783)	$ 0
Prepaid pension	(3,472)	(3,730)
Deferred loan income	(2,165)	(1,614)
Purchase accounting adjustments	(631)	(801)
Depreciation on premises and equipment	(1,590)	(1,061)
Other	(812)	(823)
Total Deferred Tax liabilities	(12,453)	(8,029)
Deferred Tax Assets:
Net unrealized holding losses on securities available-for-sale	0	361
Allowance for loan losses	17,567	18,890
Other employee benefits	2,453	2,369
Low income housing partnerships	4,049	3,147
Net adjustment to funded status of pension	11,089	6,495
Impairment of securities	1,313	1,313
Delinquent interest on nonaccrual loans	0	1,626
State net operating loss carryforwards	2,249	1,828
Other	4,668	3,950
Gross Deferred Tax Assets	43,388	39,979
Less: Valuation allowance	(2,249)	(2,199)
Total Deferred Tax Assets	41,139	37,780
Net Deferred Tax Asset	$ 28,686	$ 29,751

XML

Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2013
Loans Receivable [Line Items]
Transfers out of Level 3	$ 300,000	$ 0	$ (344,000)
Liabilities measured at fair value on nonrecurring basis		$ 0

XML

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan - Summary of Nonstatutory Stock Options Activity (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Nonstatutory Stock Option Activity (shares) [Roll Forward]
Outstanding, Beginning of year	428,900	675,500	757,050
Granted	0	0	0
Exercised	0	0	0
Forfeited	(273,400)	(246,600)	(81,550)
Outstanding, End of year	155,500	428,900	675,500
Number of Shares Exercisable, End of year	155,500	428,900	675,500
Nonstatutory Stock Options, Outstanding, Weighted Average Exercise Price (dollars per share) [Abstract]
Beginning of year	$ 37.36	$ 35.18	$ 34.33
Granted	$ 0	$ 0	$ 0.00
Exercised	$ 0	$ 0	$ 0
Forfeited	$ 37.08	$ 31.39	$ 27.29
End of year	$ 37.86	$ 37.36	$ 35.18
Exercisable at End of Year	$ 37.86	$ 37.36	$ 35.18
Weighted Average Remaining Contractual Term, Outstanding	1 year	1 year 4 months 24 days	2 years
Weighted Average Remaining Contractual Term, Exercisable	1 year	1 year 4 months 24 days	2 years

XML

Segments - Total Assets by Reportable Operating Segment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 4,964,686	$ 4,533,190
Community Banking [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	4,954,728	4,524,939
Insurance [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	7,468	6,926
Wealth Management [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 2,490	$ 1,325

XML

Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

The following table presents goodwill as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Balance at beginning of year	$	175,820	$	175,733
Additions	—		87
Balance at End of Year	$	175,820	$	175,820

Summary of Intangible Assets

The following table shows a summary of intangible assets as of the dates presented:

	December 31,
(dollars in thousands)	2014			2013
Gross carrying amount at beginning of year	$	16,401		$	16,401
Additions	—			—
Accumulated amortization	(13,770		)	(12,642		)
Balance at End of Year	$	2,631		$	3,759

Summary of Expected Amortization Expense for Finite-Lived Intangibles Assets

The following is a summary of the expected amortization expense for finite-lived intangibles assets, assuming no new additions, for each of the five years following December 31, 2014:

(dollars in thousands)	Amount
2015	$	883
2016	645
2017	500
2018	134
2019	122
Total	$	2,284

XML

Parent Company Condensed Financial Information

12 Months Ended

Dec. 31, 2014

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Parent Company Condensed Financial Information

PARENT COMPANY CONDENSED FINANCIAL INFORMATION

The following condensed financial statements summarize the financial position of S&T Bancorp, Inc. as of December 31, 2014 and 2013 and the results of its operations and cash flows for each of the three years ended December 31, 2014, 2013 and 2012.

BALANCE SHEETS

	December 31,
(dollars in thousands)	2014		2013
ASSETS
Cash	$	38,028	$	14,852
Investments in:
Bank subsidiary	565,927		553,825
Nonbank subsidiaries	20,569		19,561
Other assets	5,567		4,441
Total Assets	$	630,091	$	592,679
LIABILITIES
Long-term debt	$	20,619	$	20,619
Other liabilities	1,083		754
Total Liabilities	21,702		21,373
Total Shareholders’ Equity	608,389		571,306
Total Liabilities and Shareholders’ Equity	$	630,091	$	592,679

STATEMENTS OF NET INCOME

	Years ended December 31,
(dollars in thousands)	2014		2013			2012
Dividends from subsidiaries	$	46,414	$	24,087		$	35,603
Investment income	19		15			17
Interest expense on long-term debt	759		769			808
Other expenses	2,014		2,579			1,800
Income before Equity in Undistributed Net Income of Subsidiaries	43,660		20,754			33,012
Equity in undistributed net income (distribution in excess of net income) of:
Bank subsidiary	13,351		29,926			1,371
Nonbank subsidiaries	899		(141		)	(183		)
Net Income	$	57,910	$	50,539		34,200

STATEMENTS OF CASH FLOWS

	Years ended December 31,
(dollars in thousands)	2014			2013			2012
OPERATING ACTIVITIES
Net Income	$	57,910		$	50,539		$	34,200
Equity in undistributed (earnings) losses of subsidiaries	(14,250		)	(29,785		)	(1,188		)
Tax (benefit) expense from stock-based compensation	(16		)	(96		)	30
Other	(106		)	121			1,023
Net Cash Provided by Operating Activities	43,538			20,779			34,065
INVESTING ACTIVITIES
Net investments in subsidiaries	—			—			(5,035		)
Acquisitions	—			—			(14,123		)
Net Cash Used in Investing Activities	—			—			(19,158		)
FINANCING ACTIVITIES
(Purchase) Sale of treasury shares, net	(163		)	(88		)	998
Cash dividends paid to common shareholders	(20,215		)	(18,137		)	(17,357		)
Tax benefit (expense) from stock-based compensation	16			96			(30		)
Net Cash Used in Financing Activities	(20,362		)	(18,129		)	(16,389		)
Net increase (decrease) in cash	23,176			2,650			(1,482		)
Cash at beginning of year	14,852			12,202			13,684
Cash at End of Year	$	38,028		$	14,852		$	12,202

XML

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan

INCENTIVE AND RESTRICTED STOCK PLAN AND DIVIDEND REINVESTMENT PLAN

We adopted an Incentive Stock Plan in 1992 that provided for granting incentive stock options, nonstatutory stock options, restricted stock and appreciation rights. On October 17, 1994, the 1992 Stock Plan was amended to include outside directors. The 1992 Stock Plan had a maximum of 3,200,000 shares of our common stock and expired ten years from the date of board approval. At December 31, 2002, 3,180,822 nonstatutory stock options and restricted stock had been granted under the 1992 Stock Plan. No further awards will be made under the 1992 Stock Plan. All grants under the 1992 Stock Plan have expired at December 31, 2012.

We adopted an Incentive Stock Plan in 2003 that provides for granting incentive stock options, nonstatutory stock options, restricted stock and appreciation rights. The 2003 Stock Plan has a maximum of 1,500,000 shares of our common stock and expires ten years from the date of board approval. The 2003 Stock Plan is similar to the 1992 Stock Plan, which the 2003 Stock Plan replaced. No further awards will be granted under the 2003 Stock Plan.

We adopted an Incentive Stock Plan in 2014 that provides for cash performance awards and for granting incentive stock options, nonstatutory stock options, restricted stock, restricted stock units and appreciation rights. The 2014 Incentive Plan has a maximum of 750,000 shares of our common stock and expires ten years from the date of board approval. With respect to stock compensation provisions, the 2014 Incentive Plan is similar to the 2003 Stock Plan, which the 2014 Stock Plan replaced.

Stock Options

As of December 31, 2014, 155,500 nonstatutory stock options are outstanding under the 2003 Stock Plan. Nonstatutory stock options granted in 2006 and 2005 are fully vested and have a ten year life. These stock options were fully expensed in 2010.

The fair value of nonstatutory stock option awards under the 2003 Stock Plan were estimated on the date of grant using the Black-Scholes valuation model, which is dependent upon certain assumptions. We use the simplified method in developing the estimated life of the option, whereby the expected life is presumed to be the midpoint between the vesting date and the end of the contractual term. There have been no nonstatutory stock options granted since 2006.

The following table summarizes activity for nonstatutory stock options for the years ended December 31:

	2014					2013					2012
	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term
Outstanding at beginning of year	428,900		$	37.36		675,500		$	35.18		757,050		$	34.33
Granted	—		—			—		—			—		—
Exercised	—		—			—		—			—		—
Forfeited	(273,400	)	37.08			(246,600	)	31.39			(81,550	)	27.29
Outstanding at End of Year	155,500		$	37.86	1.0 year	428,900		$	37.36	1.4 years	675,500		$	35.18	2.0 years
Exercisable at End of Year	155,500		$	37.86	1.0 year	428,900		$	37.36	1.4 years	675,500		$	35.18	2.0 years

The aggregate intrinsic value of options outstanding and exercisable was zero as of December 31, 2014, 2013 and 2012. The aggregate intrinsic value represents the total pretax intrinsic value (the difference between our closing stock price on the last trading day of the fourth quarter and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on December 31, 2014.

As of December 31, 2014, 2013 and 2012 all outstanding stock options have vested. During the years ended December 31, 2014, 2013 and 2012 no stock options were exercised.

Restricted Stock

We periodically issue restricted stock to employees and directors, pursuant to our Stock Plans. As of December 31, 2014, 259,673 restricted shares have been granted under the 2003 Stock Plan and 80,455 restricted shares have been granted under the 2014 Stock Plan.

During 2014, 2013 and 2012, we granted 13,824, 18,942 and 19,362 restricted shares of common stock, to outside directors. The 2014 grants were issued under the 2014 Stock Plan and the 2013 and 2012 grants were issued under the 2003 Stock Plan. The grants are part of the compensation arrangement approved by the Compensation and Benefits Committee whereby the directors receive compensation in both the form of cash and restricted shares of common stock. These shares fully vest one year after the date of grant.

Also during 2014, 2013 and 2012, we granted 66,631, 3,247 and 48,008 restricted shares of common stock to senior management. The 2014 grants were issued under the 2014 Stock Plan and the 2013 and 2012 grants were issued under the 2003 Stock Plan. The awards to senior management were granted in accordance with performance levels set by the Compensation and Benefits Committee. During 2013 and 2012 restricted shares were granted on two occasions and have different vesting periods. The restricted stock grants for 2013 of 3,247 shares and for 2012 of 9,897 shares vest fully on the second anniversary of the grant dates. The restricted shares granted under our Long Term Incentive Plan, or LTIP, for 2014 and 2012 of 66,631 and 38,111 shares, respectively consisted of both time and performance-based awards. The 2014 grants were issued under the 2014 Stock Plan and there were no shares granted under the 2003 Stock Plan in 2013. Vesting for the time-based awards is 50 percent after two years and the remaining 50 percent at the end of the third year. The performance-based awards vest at the end of the three year period. During the vesting period, the recipient receives dividends and has the right to vote the unvested shares granted, except for the 2014 LTIP performance-based award. If the recipient leaves S&T before the end of the vesting period, shares will be forfeited except in the case of retirement, disability or death where accelerated vesting provisions are defined within the awards agreement.

Compensation expense for time-based restricted stock is recognized ratably over the period of service, generally the entire vesting period, based on fair value on the date of grant. For grants made to directors, the fair value is determined by the closing price of the stock on the date of grant. The average of the high and low prices of the stock on the grant date is used for senior management. Compensation expense for performance-based restricted stock is recognized ratably over the remaining vesting period once the likelihood of meeting the performance measure is probable. During 2014, 2013 and 2012, we recognized compensation expense of $0.9 million, $0.6 million and $0.9 million and realized a tax benefit of $0.3 million, $0.2 million and $0.3 million related to restricted stock grants.

The following table provides information about restricted stock granted under the 2003 Stock Plan for the years ended December 31:

	Restricted Stock	Weighted Average Grant Date Fair Value
Non-vested at December 31, 2012	115,019	$	22.39
Granted	22,189	19.18
Vested	45,864	19.68
Forfeited	11,929	21.30
Non-vested at December 31, 2013	79,415	$	21.50
Granted	—	—
Vested	41,740	20.70
Forfeited	14,530	20.97
Non-vested at December 31, 2014	23,145	$	23.28

The following table provides information about restricted stock granted under the 2014 Stock Plan for the years ended December 31:

	Restricted Stock	Weighted Average Grant Date Fair Value
Non-vested at December 31, 2013	—	$	—
Granted	80,455	23.24
Vested	158	23.19
Forfeited	473	23.19
Non-vested at December 31, 2014	79,824	$	23.24

As of December 31, 2014, there was $1.5 million of total unrecognized compensation cost related to restricted stock that will be recognized as compensation expense over a weighted average period of 1.97 years.

Dividend Reinvestment Plan

We also sponsor a Dividend Reinvestment and Stock Purchase Plan, or Dividend Plan, where shareholders may purchase shares of S&T common stock at the average fair value with reinvested dividends and voluntary cash contributions. The plan administrator and transfer agent may purchase shares directly from us from shares held in treasury or purchase shares in the open market to fulfill the Dividend Plan’s needs.

XML

Mortgage Servicing Rights - Schedule of Mortgage Servicing Rights and Net Carrying Values (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Servicing Rights [Member]
Mortgage Loan on Real Estate, Write-down or Reserve [Roll Forward]
Beginning balance	$ 3,208	$ 3,206
Additions	431	780
Amortization	(531)	(778)
Ending balance	3,108	3,208
Valuation Allowance [Member]
Mortgage Loan on Real Estate, Write-down or Reserve [Roll Forward]
Beginning balance	(289)	(1,100)
Temporary impairment recapture	(2)	811
Ending balance	(291)	(289)
Net Carrying Value [Member]
Mortgage Loan on Real Estate, Write-down or Reserve [Roll Forward]
Beginning balance	2,919	2,106
Additions	431	780
Amortization	(531)	(778)
Temporary impairment recapture	(2)	811
Ending balance	$ 2,817	$ 2,919

XML

Segments (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Total Assets by Reportable Operating Segment

The following represents total assets by reportable operating segment as of December 31:

(dollars in thousands)	2014		2013
Community Banking	$	4,954,728	$	4,524,939
Insurance	7,468		6,926
Wealth Management	2,490		1,325
Total Assets	$	4,964,686	$	4,533,190

Financial Information of Segments

. The information provided under the caption “Eliminations” represents operations not considered to be reportable segments and/or general operating expenses and eliminations and adjustments, which are necessary for purposes of reconciling to the Consolidated Financial Statements.

	For the Year Ended December 31, 2014
(dollars in thousands)	Community Banking		Insurance		Wealth Management		Eliminations			Consolidated
Interest income	$	160,403	$	2	$	518	$	(400	)	$	160,523
Interest expense	13,989		—		—		(1,508		)	12,481
Net interest income	146,414		2		518		1,108			148,042
Provision for loan losses	1,715		—		—		—			1,715
Noninterest income	29,443		5,279		11,297		319			46,338
Noninterest expense	97,733		4,313		9,173		1,427			112,646
Depreciation expense	3,387		51		27		—			3,465
Amortization of intangible assets	1,039		51		39		—			1,129
Provision for income taxes	16,311		303		901		—			17,515
Net Income	$	55,672	$	563	$	1,675	$	—		$	57,910

	For the Year Ended December 31, 2013
(dollars in thousands)	Community Banking		Insurance			Wealth Management		Eliminations			Consolidated
Interest income	$	153,450	$	2		$	517	$	(213	)	$	153,756
Interest expense	16,508		—			—		(1,945		)	14,563
Net interest income	136,942		2			517		1,732			139,193
Provision for loan losses	8,311		—			—		—			8,311
Noninterest income	34,649		5,483			10,662		733			51,527
Noninterest expense	94,769		5,210			9,850		2,465			112,294
Depreciation expense	3,430		47			30		—			3,507
Amortization of intangible assets	1,492		51			48		—			1,591
Provision (benefit) for income taxes	14,180		(47		)	345		—			14,478
Net Income	$	49,409	$	224		$	906	$	—		$	50,539

	For the Year Ended December 31, 2012
(dollars in thousands)	Community Banking		Insurance			Wealth Management		Eliminations			Consolidated
Interest income	$	155,865	$	1		$	454	$	(69	)	$	156,251
Interest expense	22,135		—			—		(1,111		)	21,024
Net interest income	133,730		1			454		1,042			135,227
Provision for loan losses	22,815		—			—		—			22,815
Noninterest income	36,422		5,262			9,788		440			51,912
Noninterest expense	100,474		5,569			9,717		1,482			117,242
Depreciation expense	3,833		48			31		—			3,912
Amortization of intangible assets	1,600		52			57		—			1,709
Provision (benefit) for income taxes	7,420		(242		)	83		—			7,261
Net Income (Loss)	$	34,010	$	(164	)	$	354	$	—		$	34,200

XML

Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Value of Derivative Assets and Derivative Liabilities

The following table indicates the amount representing the value of derivative assets and derivative liabilities at December 31:

	Derivatives (included in Other Assets)				Derivatives (included in Other Liabilities)
(dollars in thousands)	2014		2013		2014		2013
Derivatives not Designated as Hedging Instruments
Interest Rate Swap Contracts—Commercial Loans
Fair value	$	12,981	$	13,698	$	12,953	$	13,647
Notional amount	245,152		261,754		245,152		261,754
Collateral posted	—		—		12,059		12,611
Interest Rate Lock Commitments—Mortgage Loans
Fair value	235		85		—		—
Notional amount	8,822		3,989		—		—
Forward Sale Contracts—Mortgage Loans
Fair value	—		34		57		—
Notional amount	—		5,250		7,789		—

Schedule of Gross Amounts of Derivative Assets and Derivative Liabilities

The following table indicates the gross amounts of commercial loan swap derivative assets and derivative liabilities, the amounts offset and the carrying values in the Consolidated Balance Sheets at December 31:

	Derivatives (included in Other Assets)						Derivatives (included in Other Liabilities)
(dollars in thousands)	2014			2013			2014			2013
Derivatives not Designated as Hedging Instruments
Gross amounts recognized	$	13,203		$	14,012		$	13,175		$	13,961
Gross amounts offset	(222		)	(314		)	(222		)	(314		)
Net amounts presented in the Consolidated Balance Sheets	12,981			13,698			12,953			13,647
Gross amounts not offset(1)	—			—			(12,059		)	(12,611		)
Net Amount	$	12,981		$	13,698		$	894		$	1,036

(1) Amounts represent posted collateral.

Amount of Gain or Loss Recognized in Income on Derivatives

The following table indicates the gain or loss recognized in income on derivatives for the years ended December 31:

(dollars in thousands)	2014			2013			2012
Derivatives not Designated as Hedging Instruments
Interest rate swap contracts—commercial loans	$	(24	)	$	(174	)	$	101
Interest rate lock commitments—mortgage loans	150			(382		)	223
Forward sale contracts—mortgage loans	(90		)	82			47
Total Derivative Gain (Loss)	$	36		$	(474	)	$	371

XML

Regulatory Matters

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Regulatory Matters

REGULATORY MATTERS

We are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet the minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on our consolidated financial statements. Under capital guidelines and the regulatory framework for prompt corrective action, we must meet specific capital guidelines that involve quantitative measures of our assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. Our capital amounts and classification are also subject to qualitative judgments by the regulators about risk weightings and other factors.

The most recent notifications from the Federal Reserve and the FDIC categorized S&T and S&T Bank as well capitalized under the regulatory framework for corrective action. There have been no conditions or events that we believe have changed S&T or S&T Bank’s status during 2014 and 2013.

Tier 1 capital consists principally of shareholders’ equity, including preferred stock; excluding items recorded in accumulated other comprehensive income (loss), less goodwill and other intangibles. For regulatory purposes, trust preferred securities totaling $20.0 million, issued by an unconsolidated trust subsidiary of S&T underlying junior subordinated debt, are included in Tier 1 capital for S&T. Total capital consists of Tier 1 capital plus junior subordinated debt and the ALL subject to limitation. We currently have $25.0 million in junior subordinated debt which is included in Tier 2 capital for S&T in accordance with current regulatory reporting requirements.

Quantitative measures established by regulation to ensure capital adequacy require us to maintain minimum amounts and ratios of Total and Tier 1 capital to risk-weighted assets and Tier 1 capital to average assets. As of December 31, 2014 and 2013, we met all capital adequacy requirements to which we are subject.

The following table summarizes risk-based capital amounts and ratios for S&T and S&T Bank.

	Actual				Minimum Regulatory Capital Requirements				To be Well Capitalized Under Prompt Corrective Action Provisions
(dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2014
Total Capital (to Risk-Weighted Assets)
S&T	$	537,935	14.27	%	$	301,548	8.00	%	$	376,936	10.00	%
S&T Bank	475,538		12.68	%	300,095		8.00	%	375,119		10.00	%
Tier 1 Capital (to Risk-Weighted Assets)
S&T	465,114		12.34	%	150,774		4.00	%	226,161		6.00	%
S&T Bank	403,593		10.76	%	150,048		4.00	%	225,071		6.00	%
Leverage Ratio(1)
S&T	465,114		9.80	%	189,895		4.00	%	237,369		5.00	%
S&T Bank	403,593		8.53	%	189,182		4.00	%	236,477		5.00	%
As of December 31, 2013
Total Capital (to Risk-Weighted Assets)
S&T	$	494,986	14.36	%	$	275,684	8.00	%	$	344,606	10.00	%
S&T Bank	457,540		13.35	%	274,257		8.00	%	342,821		10.00	%
Tier 1 Capital (to Risk-Weighted Assets)
S&T	426,234		12.37	%	137,842		4.00	%	206,763		6.00	%
S&T Bank	389,584		11.36	%	137,128		4.00	%	205,693		6.00	%
Leverage Ratio(1)
S&T	426,234		9.75	%	174,824		4.00	%	218,530		5.00	%
S&T Bank	389,584		8.95	%	174,081		4.00	%	217,601		5.00	%

(1) Minimum requirement is 3.00 percent for the most highly rated financial institutions.

XML

Segments

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Segments

SEGMENTS

We operate three reportable operating segments: Community Banking, Insurance and Wealth Management.

• Our Community Banking segment offers services which include accepting time and demand deposits, originating commercial and consumer loans and providing letters of credit and credit card services.

• Our Insurance segment includes a full-service insurance agency offering commercial property and casualty insurance, group life and health coverage, employee benefit solutions and personal insurance lines.

• Our Wealth Management segment offers discount brokerage services, services as executor and trustee under wills and deeds, guardian and custodian of employee benefits and other trust and brokerage services, as well as a registered investment advisor that manages private investment accounts for individuals and institutions.

The following represents total assets by reportable operating segment as of December 31:

(dollars in thousands)	2014		2013
Community Banking	$	4,954,728	$	4,524,939
Insurance	7,468		6,926
Wealth Management	2,490		1,325
Total Assets	$	4,964,686	$	4,533,190

The following tables provide financial information for our three segments. The financial results of the business segments include allocations for shared services based on an internal analysis that supports line of business and branch performance measurement. Shared services include expenses such as employee benefits, occupancy expense, computer support and other corporate overhead. Even with these allocations, the financial results are not necessarily indicative of the business segments’ financial condition and results of operations as if they existed as independent entities. The information provided under the caption “Eliminations” represents operations not considered to be reportable segments and/or general operating expenses and eliminations and adjustments, which are necessary for purposes of reconciling to the Consolidated Financial Statements.

	For the Year Ended December 31, 2014
(dollars in thousands)	Community Banking		Insurance		Wealth Management		Eliminations			Consolidated
Interest income	$	160,403	$	2	$	518	$	(400	)	$	160,523
Interest expense	13,989		—		—		(1,508		)	12,481
Net interest income	146,414		2		518		1,108			148,042
Provision for loan losses	1,715		—		—		—			1,715
Noninterest income	29,443		5,279		11,297		319			46,338
Noninterest expense	97,733		4,313		9,173		1,427			112,646
Depreciation expense	3,387		51		27		—			3,465
Amortization of intangible assets	1,039		51		39		—			1,129
Provision for income taxes	16,311		303		901		—			17,515
Net Income	$	55,672	$	563	$	1,675	$	—		$	57,910

	For the Year Ended December 31, 2013
(dollars in thousands)	Community Banking		Insurance			Wealth Management		Eliminations			Consolidated
Interest income	$	153,450	$	2		$	517	$	(213	)	$	153,756
Interest expense	16,508		—			—		(1,945		)	14,563
Net interest income	136,942		2			517		1,732			139,193
Provision for loan losses	8,311		—			—		—			8,311
Noninterest income	34,649		5,483			10,662		733			51,527
Noninterest expense	94,769		5,210			9,850		2,465			112,294
Depreciation expense	3,430		47			30		—			3,507
Amortization of intangible assets	1,492		51			48		—			1,591
Provision (benefit) for income taxes	14,180		(47		)	345		—			14,478
Net Income	$	49,409	$	224		$	906	$	—		$	50,539

	For the Year Ended December 31, 2012
(dollars in thousands)	Community Banking		Insurance			Wealth Management		Eliminations			Consolidated
Interest income	$	155,865	$	1		$	454	$	(69	)	$	156,251
Interest expense	22,135		—			—		(1,111		)	21,024
Net interest income	133,730		1			454		1,042			135,227
Provision for loan losses	22,815		—			—		—			22,815
Noninterest income	36,422		5,262			9,788		440			51,912
Noninterest expense	100,474		5,569			9,717		1,482			117,242
Depreciation expense	3,833		48			31		—			3,912
Amortization of intangible assets	1,600		52			57		—			1,709
Provision (benefit) for income taxes	7,420		(242		)	83		—			7,261
Net Income (Loss)	$	34,010	$	(164	)	$	354	$	—		$	34,200

XML

Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES
Net Income	$ 57,910	$ 50,539	$ 34,200
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,715	8,311	22,815
Provision for Other Losses	(655)	(60)	1,811
Depreciation and amortization	4,703	5,333	7,000
Net amortization of discounts and premiums	3,680	3,826	2,280
Stock-based compensation expense	975	687	913
Securities (gains) losses, net	(41)	(5)	(3,016)
Net gain on sale of merchant card servicing business	0	(3,093)	0
Tax (benefit) expense from stock-based compensation	(16)	(96)	30
Mortgage loans originated for sale	(42,842)	(66,695)	(104,924)
Proceeds from the sale of loans	42,361	87,932	86,886
Deferred income taxes	1,536	(2,358)	1,038
Gain on sale of fixed assets	(33)
Gain on the sale of loans, net	(353)	(874)	(1,612)
Net (increase) decrease in interest receivable	(933)	(130)	973
Net decrease in interest payable	(127)	(2,005)	(1,376)
Net decrease in other assets	7,628	25,681	18,815
Net increase (decrease) in other liabilities	2,595	(20,917)	18,057
Net Cash Provided by Operating Activities	78,103	86,076	83,890
INVESTING ACTIVITIES
Purchases of securities available-for-sale	57,092	66,744	87,604
Proceeds from sales of securities available-for-sale	1,418	94	66,575
Purchases of securities available-for-sale	(181,213)	(144,752)	(166,786)
Net proceeds from the redemption of Federal Home Loan Bank stock	(1,506)	1,685	5,700
Net (increase) decrease in loans	(313,264)	(241,172)	(21,892)
Proceeds from the sale of loans not originated for resale	5,408	5,158	3,874
Purchases of premises and equipment	(5,079)	(2,833)	(2,179)
Proceeds from the sale of premises and equipment	96	643	142
Net cash acquired from bank acquisitions			18,639
Proceeds from the sale of merchant card servicing business		4,750
Net Cash Used in Investing Activities	(437,048)	(309,683)	(8,323)
FINANCING ACTIVITIES
Net increase (decrease) in core deposits	240,948	(22,767)	207,653
Net (decrease) increase in certificates of deposit	(4,549)	56,174	(217,311)
Net increase (decrease) in short-term borrowings	150,000	65,000
Net (decrease) increase in securities sold under repurchase agreements	(3,242)	(28,735)	28,442
Proceeds from long-term borrowings			4,311
Repayments of long-term borrowings	(2,367)	(12,291)	(15,088)
Repayment of junior subordinated debt		(45,000)
Purchase of treasury shares	(163)	(88)	(49)
Sale of treasury shares			1,047
Issuance costs	(271)
Cash dividends paid to common shareholders	(20,203)	(18,137)	(17,357)
Tax benefit (expense) from stock-based compensation	16	96	(30)
Net Cash Provided by (Used in) Financing Activities	360,169	(5,748)	(8,382)
Net increase (decrease) in cash and cash equivalents	1,224	(229,355)	67,185
Cash and cash equivalents at beginning of year	108,356	337,711	270,526
Cash and Cash Equivalents at End of Year	109,580	108,356	337,711
Supplemental Disclosures
Transfers to other real estate owned and other repossessed assets	586	1,238	1,915
Interest paid	12,609	16,568	22,329
Income taxes paid, net of refunds	18,075	13,130	4,063
Loans transferred to held for sale	0	5,158	19,255
Net assets (liabilities) from acquisitions, excluding cash and cash equivalents			$ (683)

XML

Other Noninterest Expense

12 Months Ended

Dec. 31, 2014

Other Income and Expenses [Abstract]

Other Noninterest Expense

OTHER NONINTEREST EXPENSE

Other noninterest expense is presented in the table below:

	Years Ended December 31,
(dollars in thousands)	2014		2013		2012
Other noninterest expenses:
Joint venture amortization	$	4,054	$	4,095	$	4,199
Loan related expenses	2,579		2,432		2,538
Telecommunications	2,220		1,691		1,415
Amortization of intangibles	1,129		1,591		1,709
Other real estate owned	264		445		2,166
Other	11,224		10,661		12,815
Total Other Noninterest Expenses	$	21,470	$	20,915	$	24,842

XML

Allowance for Loan Losses - Recorded Investment in Commercial Loan Classes by Internally Assigned Risk Ratings (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	$ 2,892,522	$ 2,593,880
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	2,780,315	2,430,926
Total percentage of recorded investment in commercial loan	96.10%	93.70%
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	65,968	106,779
Total percentage of recorded investment in commercial loan	2.30%	4.10%
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	46,239	56,175
Total percentage of recorded investment in commercial loan	1.60%	2.20%
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	1,682,236	1,607,756
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	1,635,132	1,519,720
Total percentage of recorded investment in commercial loan	97.20%	94.50%
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	23,597	57,073
Total percentage of recorded investment in commercial loan	1.40%	3.60%
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	23,507	30,963
Total percentage of recorded investment in commercial loan	1.40%	1.90%
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	994,138	842,449
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	948,663	792,029
Total percentage of recorded investment in commercial loan	95.40%	94.00%
Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	30,357	34,085
Total percentage of recorded investment in commercial loan	3.10%	4.10%
Commercial and Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	15,118	16,335
Total percentage of recorded investment in commercial loan	1.50%	1.90%
Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	216,148	143,675
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Commercial Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	196,520	119,177
Total percentage of recorded investment in commercial loan	90.90%	82.90%
Commercial Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	12,014	15,621
Total percentage of recorded investment in commercial loan	5.60%	10.90%
Commercial Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in commercial loan	$ 7,614	$ 8,877
Total percentage of recorded investment in commercial loan	3.50%	6.20%

XML

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Income Taxes [Line Items]
Statutory tax rate	35.00%	35.00%	35.00%
Deferred tax assets operating loss carry forwards, total	$ 22,500,000
Valuation allowance related to gross deferred tax assets	2,249,000	2,199,000
Decrease to eliminate unrecognized tax benefit related to bad debts	1,673,000	0	0
Tax related interest	100,000	200,000
Adjustments impacting tax expense	0
Minimum [Member]
Schedule Of Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards, expiry date	2020
Maximum [Member]
Schedule Of Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards, expiry date	2034
PENNSYLVANIA
Schedule Of Income Taxes [Line Items]
Valuation allowance related to gross deferred tax assets	$ 2,200,000

XML

Loans and Loans Held for Sale (Tables)

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Composition of Loans

The following table indicates the composition of the loans as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Commercial
Commercial real estate	$	1,682,236	$	1,607,756
Commercial and industrial	994,138		842,449
Commercial construction	216,148		143,675
Total Commercial Loans	2,892,522		2,593,880
Consumer
Residential mortgage	489,586		487,092
Home equity	418,563		414,195
Installment and other consumer	65,567		67,883
Consumer construction	2,508		3,149
Total Consumer Loans	976,224		972,319
Total Portfolio Loans	3,868,746		3,566,199
Loans held for sale	2,970		2,136
Total Loans	$	3,871,716	$	3,568,335

Restructured Loans for Periods Presented

The following table summarizes the restructured loans as of the dates presented:

	December 31, 2014						December 31, 2013
(dollars in thousands)	Performing TDRs		Nonperforming TDRs		Total TDRs		Performing TDRs		Nonperforming TDRs		Total TDRs
Commercial real estate	$	16,939	$	2,180	$	19,119	$	19,711	$	3,898	$	23,609
Commercial and industrial	8,074		356		8,430		7,521		1,884		9,405
Commercial construction	5,736		1,869		7,605		5,338		2,708		8,046
Residential mortgage	2,839		459		3,298		2,581		1,356		3,937
Home equity	3,342		562		3,904		3,924		218		4,142
Installment and other consumer	53		10		63		154		3		157
Total	$	36,983	$	5,436	$	42,419	$	39,229	$	10,067	$	49,296

Restructured Loans for Periods Stated

The following tables present the restructured loans for the 12 months ended December 31:

	2014
(dollars in thousands)	Number of Loans	Pre-Modification Outstanding Recorded Investment(1)		Post-Modification Outstanding Recorded Investment(1)		Total Difference in Recorded Investment
Commercial real estate
Principal deferral	4	$	1,991	$	1,965	$	26
Commercial and industrial
Principal deferral	2	$	381	$	356	$	25
Commercial construction
Maturity date extension	1	1,019		974		45
Residential mortgage
Chapter 7 bankruptcy(2)	9	651		634		17
Home equity
Maturity date extension	6	349		348		1
Interest rate reduction and maturity date extension	2	96		95		1
Chapter 7 bankruptcy(2)	15	432		382		50
Installment and other consumer
Chapter 7 bankruptcy(2)	5	30		23		7
Total by Concession Type
Principal deferral	6	2,372		2,321		51
Interest rate reduction and maturity date extension	2	96		95		1
Maturity date extension	7	1,368		1,322		46
Chapter 7 bankruptcy(2)	29	1,113		1,039		74
Total	44	$	4,949	$	4,777	$	172

(1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end.

(2) Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.

	2013
(dollars in thousands)	Number of Loans	Pre-Modification Outstanding Recorded Investment(1)		Post-Modification Outstanding Recorded Investment(1)		Total Difference in Recorded Investment
Commercial real estate
Principal deferral	4	$	2,772	$	2,494	$	(278	)
Interest rate reduction and maturity date extension	2	664		636		(28		)
Principal forgiveness (2)	1	4,339		4,216		(123		)
Maturity date extension	1	219		219		—
Chapter 7 bankruptcy(3)	6	227		190		(37		)
Commercial and industrial
Principal deferral	2	$	670	$	638	$	(32	)
Maturity date extension	1	751		739		(12		)
Chapter 7 bankruptcy(3)	1	3		1		(2		)
Residential mortgage
Principal deferral	2	153		149		(4		)
Interest rate reduction	1	54		54		—
Chapter 7 bankruptcy(3)	8	617		592		(25		)
Home Equity
Principal deferral	1	174		17		(157		)
Chapter 7 bankruptcy(3)	30	1,032		982		(50		)
Installment and other consumer
Chapter 7 bankruptcy(3)	11	104		91		(13		)
Total by Concession Type
Principal deferral	9	3,769		3,298		(471		)
Interest rate reduction	1	54		54		—
Interest rate reduction and maturity date extension	2	664		636		(28		)
Principal forgiveness (2)	1	4,339		4,216		(123		)
Maturity date extension	2	970		958		(12		)
Chapter 7 bankruptcy(3)	56	1,983		1,856		(127		)
Total	71	$	11,779	$	11,018	$	(761	)

(1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end.

(2) This loan had debt forgiveness of $0.1 million to the customer; however, the loan was previously charged-off to a balance below the actual contractual balance.

(3) Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.

Summary of Nonperforming Assets of Defaulted TDRs

The following table is a summary of TDRs which defaulted during the years ended December 31, 2014 and 2013 that had been restructured within the last 12 months prior to defaulting:

	Defaulted TDRs
	For the Year Ended December 31, 2014			For the Year Ended December 31, 2013
(dollars in thousands)	Number of Defaults	Recorded Investment		Number of Defaults	Recorded Investment
Commercial real estate	—	$	—	1	$	75
Commercial and industrial	—	—		2	438
Residential real estate	1	20		8	607
Home equity	2	44		6	193
Total	3	$	64	17	$	1,313

Summary of Nonperforming Assets

The following table is a summary of nonperforming assets as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Nonperforming Assets
Nonaccrual loans	$	7,021	$	12,387
Nonaccrual TDRs	5,436		10,067
Total nonaccrual loans	12,457		22,454
OREO	166		410
Total Nonperforming Assets	$	12,623	$	22,864

Summary of Aggregate Amount of Loans

The following table presents a summary of the aggregate amount of loans to any such persons as of December 31:

(dollars in thousands)	2014			2013
Balance at beginning of year	$	23,848		$	36,075
New loans	27,799			22,534
Repayments	(24,279		)	(34,761		)
Balance at End of Year	$	27,368		$	23,848

XML

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan (Tables)

12 Months Ended

Dec. 31, 2014

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Nonstatutory Stock Options Activity

The following table summarizes activity for nonstatutory stock options for the years ended December 31:

	2014					2013					2012
	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term
Outstanding at beginning of year	428,900		$	37.36		675,500		$	35.18		757,050		$	34.33
Granted	—		—			—		—			—		—
Exercised	—		—			—		—			—		—
Forfeited	(273,400	)	37.08			(246,600	)	31.39			(81,550	)	27.29
Outstanding at End of Year	155,500		$	37.86	1.0 year	428,900		$	37.36	1.4 years	675,500		$	35.18	2.0 years
Exercisable at End of Year	155,500		$	37.86	1.0 year	428,900		$	37.36	1.4 years	675,500		$	35.18	2.0 years

2003 Stock Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Non-Vested Restricted Stock

The following table provides information about restricted stock granted under the 2003 Stock Plan for the years ended December 31:

	Restricted Stock	Weighted Average Grant Date Fair Value
Non-vested at December 31, 2012	115,019	$	22.39
Granted	22,189	19.18
Vested	45,864	19.68
Forfeited	11,929	21.30
Non-vested at December 31, 2013	79,415	$	21.50
Granted	—	—
Vested	41,740	20.70
Forfeited	14,530	20.97
Non-vested at December 31, 2014	23,145	$	23.28

2014 Stock Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Non-Vested Restricted Stock

The following table provides information about restricted stock granted under the 2014 Stock Plan for the years ended December 31:

	Restricted Stock	Weighted Average Grant Date Fair Value
Non-vested at December 31, 2013	—	$	—
Granted	80,455	23.24
Vested	158	23.19
Forfeited	473	23.19
Non-vested at December 31, 2014	79,824	$	23.24

XML

Securities Available-for-Sale - Additional Information (Detail) (USD $)	Dec. 31, 2014 security	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Number of debt securities on which unrealized losses were primarily attributable to changes in interest	20
Total temporarily impaired securities	$ 1,837,000	$ 7,776,000
Carrying values of securities	289,100,000	243,200,000
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities	$ 0

XML

Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Cash and due from banks, including interest-bearing deposits of $57,048 and $53,594 at December 31, 2014 and 2013	$ 109,580	$ 108,356
Securities available-for-sale, at fair value	640,273	509,425
Loans held for sale	2,970	2,136
Portfolio loans, net of unearned income	3,868,746	3,566,199
Allowance for loan losses	(47,911)	(46,255)
Portfolio loans, net	3,820,835	3,519,944
Bank owned life insurance	62,252	60,480
Premises and equipment, net	38,166	36,615
Federal Home Loan Bank and other restricted stock, at cost	15,135	13,629
Goodwill	175,820	175,820
Other intangible assets, net	2,631	3,759
Other assets	97,024	103,026
Total Assets	4,964,686	4,533,190
LIABILITIES
Noninterest-bearing demand	1,083,919	992,779
Interest-bearing demand	335,099	312,790
Money market	376,612	281,403
Savings	1,027,095	994,805
Certificates of deposit	1,086,117	1,090,531
Total Deposits	3,908,842	3,672,308
Securities sold under repurchase agreements	30,605	33,847
Short-term borrowings	290,000	140,000
Long-term borrowings	19,442	21,810
Junior subordinated debt securities	45,619	45,619
Other liabilities	61,789	48,300
Total Liabilities	4,356,297	3,961,884
SHAREHOLDERS’ EQUITY
Common stock ($2.50 par value) Authorized—50,000,000 shares Issued—31,197,365 shares at December 31, 2014 and 2013 Outstanding—29,796,397 shares at December 31, 2014 and 29,737,725 shares at December 31, 2013	77,993	77,993
Additional paid-in capital	78,818	78,140
Retained earnings	504,060	468,158
Accumulated other comprehensive income (loss)	(13,833)	(12,694)
Treasury stock (1,400,968 shares at December 31, 2014 and 1,459,640 shares at December 31, 2013, at cost)	(38,649)	(40,291)
Total Shareholders’ Equity	608,389	571,306
Total Liabilities and Shareholders’ Equity	$ 4,964,686	$ 4,533,190

XML

Mortgage Servicing Rights (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Mortgage Servicing Rights and Net Carrying Values

The following table indicates MSRs and the net carrying values:

(dollars in thousands)	Servicing Rights			Valuation Allowance			Net Carrying Value
Balance at December 31, 2012	$	3,206		$	(1,100	)	$	2,106
Additions	780			—			780
Amortization	(778		)	—			(778		)
Temporary impairment recapture	—			811			811
Balance at December 31, 2013	$	3,208		$	(289	)	$	2,919
Additions	431			—			431
Amortization	(531		)	—			(531		)
Temporary impairment	—			(2		)	(2		)
Balance at December 31, 2014	$	3,108		$	(291	)	$	2,817

XML

Derivative Instruments and Hedging Activities - Value of Derivative Assets and Derivative Liabilities (Detail) (Not Designated as Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	$ 12,981	$ 13,698
Fair value, Derivatives (included in Other Liabilities)	12,953	13,647
Other Assets [Member] | Interest Rate Swap Contracts-Commercial Loans [Member]
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	12,981	13,698
Notional amount, Derivatives (included in Other Assets)	245,152	261,754
Other Assets [Member] | Interest Rate Lock Commitments-Mortgage Loans [Member]
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	235	85
Notional amount, Derivatives (included in Other Assets)	8,822	3,989
Other Assets [Member] | Forward Sale Contracts-Mortgage Loans [Member]
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	0	34
Notional amount, Derivatives (included in Other Assets)	0	5,250
Other Liabilities [Member] | Interest Rate Swap Contracts-Commercial Loans [Member]
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	12,953	13,647
Notional amount, Derivatives (included in Other Liabilities)	245,152	261,754
Collateral Already Posted, Aggregate Fair Value	12,059	12,611
Other Liabilities [Member] | Forward Sale Contracts-Mortgage Loans [Member]
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	57	0
Notional amount, Derivatives (included in Other Liabilities)	$ 7,789	$ 0

XML

Segments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014 Segment
Segment Reporting [Abstract]
Number of reportable segment	3

XML

Income Taxes - Schedule of Income Tax Expense (Benefit) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Current									$ 15,979	$ 16,836	$ 6,223
Deferred									1,536	(2,358)	1,038
Total	$ 3,963	$ 4,906	$ 4,875	$ 3,771	$ 4,098	$ 4,207	$ 3,951	$ 2,222	$ 17,515	$ 14,478	$ 7,261

XML

Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Beginning balance at Dec. 31, 2011	$ 490,526	$ 74,285	$ 52,637	$ 421,468	$ (14,108)	$ (43,756)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	34,200			34,200
Other comprehensive income (loss), net of tax	526				526
Cash dividends declared	(17,357)			(17,357)
Common stock issued in acquisition	27,610	3,708	23,902
Treasury stock issued	998			(2,272)		3,270
Recognition of restricted stock compensation expense	949		949
Tax (expense) benefit from stock-based compensation	(30)		(30)
Ending balance at Dec. 31, 2012	537,422	77,993	77,458	436,039	(13,582)	(40,486)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	50,539			50,539
Other comprehensive income (loss), net of tax	888				888
Cash dividends declared	(18,137)			(18,137)
Treasury stock issued	(88)			(283)		195
Recognition of restricted stock compensation expense	586		586
Tax (expense) benefit from stock-based compensation	96		96
Ending balance at Dec. 31, 2013	571,306	77,993	78,140	468,158	(12,694)	(40,291)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	57,910			57,910
Other comprehensive income (loss), net of tax	(1,139)				(1,139)
Cash dividends declared	(20,203)			(20,203)
Treasury stock issued	(163)			(1,805)		1,642
Recognition of restricted stock compensation expense	933		933
Tax (expense) benefit from stock-based compensation	16		16
Issuance costs	(271)		(271)
Ending balance at Dec. 31, 2014	$ 608,389	$ 77,993	$ 78,818	$ 504,060	$ (13,833)	$ (38,649)

XML

Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount at beginning of year	$ 16,401	$ 16,401
Additions	0	0
Accumulated amortization	(13,770)	(12,642)
Gross carrying amount at end of year	$ 2,631	$ 3,759

XML

Other Noninterest Expense - Summary of Other Noninterest Expenses (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other noninterest expenses:
Joint venture amortization	$ 4,054	$ 4,095	$ 4,199
Loan related expenses	2,579	2,432	2,538
Communication	2,220	1,691	1,415
Amortization of intangibles	1,129	1,591	1,709
Other real estate owned	264	445	2,166
Other	11,224	10,661	12,815
Total Other Noninterest Expenses	$ 21,470	$ 20,915	$ 24,842

XML

Sale of Merchant Card Servicing Business - Additional Information (Detail) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of business		$ 4,750,000
Gain on sale of business	0	3,093,000	0
Merchant Card Servicing Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of business				4,800,000
Termination fee				1,700,000
Gain on sale of business				$ 3,100,000
Initial term of agreement	10 years

XML

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended	0 Months Ended		3 Months Ended
	Dec. 31, 2014 Subsidiary segment	Mar. 09, 2012 Subsidiary Branch	Aug. 12, 2013 Branch	Jun. 30, 2015	Dec. 31, 2013	Oct. 29, 2014 branch
Summary Of Significant Accounting Policies [Line Items]
Number of Reporting Units	3
Number of subsidiary	3
Percentage of outstanding common stock of investees accounted for using equity method of accounting	100.00%
Period for satisfactory payment of TDRs	6 months
Evaluation for impairment of substandard and nonaccrual commercial loans	$ 500,000
Carrying amount of goodwill	175,820,000				175,820,000
Amortization period of intangible assets	10 years
Percentage of amount recognized of tax benefit	50.00%
Percentage of projected benefit obligation	10.00%
Assets	4,964,686,000				4,533,190,000
Community Banking [Member]
Summary Of Significant Accounting Policies [Line Items]
Carrying amount of goodwill	171,600,000
Percentage of goodwill to reporting units	98.00%
Assets	4,954,728,000				4,524,939,000
Insurance [Member]
Summary Of Significant Accounting Policies [Line Items]
Carrying amount of goodwill	4,200,000
Percentage of goodwill to reporting units	2.00%
Assets	7,468,000				6,926,000
Common Wealth Trust Life Insurance Company [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of outstanding common stock of investees accounted for using equity method of accounting	50.00%
Mainline [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of subsidiary		1
Business acquisition date	Mar. 09, 2012
Number of branches		8
Business acquisition, loans		129,500,000
Business acquisition, deposits		206,000,000
Business acquisition cost		27,800,000
Gateway [Member]
Summary Of Significant Accounting Policies [Line Items]
Business acquisition date	Aug. 13, 2012
Number of branches			2
Business acquisition, loans			99,100,000
Business acquisition, deposits			105,400,000
Business acquisition cost			19,800,000
Integrity Bancshares, Inc. [Member]
Summary Of Significant Accounting Policies [Line Items]
Transaction value						155,000,000
Number of Branches						8
Assets						$ 860,000,000
Interest Rate Lock Commitments [Member]
Summary Of Significant Accounting Policies [Line Items]
Period for interest rate lock commitment	60 days
Commercial Real Estate [Member]
Summary Of Significant Accounting Policies [Line Items]
Allowance for loan loss emergence period	3 years 6 months
Period lengthened the LEP assumption for the consumer portfolio	1 year 6 months
Commercial and Industrial [Member]
Summary Of Significant Accounting Policies [Line Items]
Allowance for loan loss emergence period	2 years 6 months
Consumer Portfolio Segment [Member]
Summary Of Significant Accounting Policies [Line Items]
Allowance for loan loss emergence period	2 years
Period lengthened the LEP assumption for the consumer portfolio	1 year 6 months
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of outstanding common stock of investees accounted for using equity method of accounting	20.00%
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of outstanding common stock of investees accounted for using equity method of accounting	50.00%
Scenario, Forecast [Member] | Integrity Bancshares, Inc. [Member]
Summary Of Significant Accounting Policies [Line Items]
Period of intended operation subsequent to merger				3 years

XML

Mortgage Servicing Rights - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Mortgage Loan Activity [Line Items]
Sale of 1-4 family mortgage loans to Federal National Mortgage Association (FNMA)	$ 42,361,000	$ 87,932,000	$ 86,886,000
Total servicing portfolio	325,800,000	327,400,000	329,200,000
Federal National Mortgage Association or (FNMA) [Member]
Mortgage Loan Activity [Line Items]
Sale of 1-4 family mortgage loans to Federal National Mortgage Association (FNMA)	$ 40,100,000	$ 62,900,000	$ 82,900,000

XML

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Nature of Operations

Nature of Operations

S&T Bancorp, Inc., or S&T, was incorporated on March 17, 1983 under the laws of the Commonwealth of Pennsylvania as a bank holding company and has three wholly owned subsidiaries, S&T Bank, 9th Street Holdings, Inc. and STBA Capital Trust I. We own a one-half interest in Commonwealth Trust Credit Life Insurance Company, or CTCLIC.

We are presently engaged in nonbanking activities through the following five entities: 9th Street Holdings, Inc.; S&T Bancholdings, Inc.; CTCLIC; S&T Insurance Group, LLC and Stewart Capital Advisors, LLC. 9th Street Holdings, Inc. and S&T Bancholdings, Inc. are investment holding companies. CTCLIC, which is a joint venture with another financial institution, acts as a reinsurer of credit life, accident and health insurance policies sold by S&T Bank and the other institution. S&T Insurance Group, LLC, through its subsidiaries, offers a variety of insurance products. Stewart Capital Advisors, LLC is a registered investment advisor that manages private investment accounts for individuals and institutions and advises the Stewart Capital Mid Cap Fund.

On March 9, 2012 we completed the acquisition and conversion of Mainline Bancorp, Inc., or Mainline, a bank holding company based in Ebensburg, Pennsylvania. Mainline had one subsidiary, Mainline National Bank, with eight branches and $129.5 million in loans and $206.0 million in deposits. The acquisition expanded our market share and footprint throughout Cambria and Blair counties of western Pennsylvania. The total acquisition cost of Mainline was $27.8 million.

On August 13, 2012, we completed the acquisition of Gateway Bank of Pennsylvania, a bank with $99.1 million in loans and $105.4 million in deposits, headquartered in McMurray, Pennsylvania. The total acquisition cost of Gateway Bank was $19.8 million. As of December 31, 2012, Gateway was operating as a separate wholly-owned subsidiary of S&T, with all transactions since the acquisition date consolidated in our financial statements. On February 8, 2013, Gateway Bank was merged into S&T Bank, and their two branches are now fully operational branches of S&T Bank.

Accounting Policies

Accounting Policies

Our financial statements have been prepared in accordance with U. S. generally accepted accounting principles, or GAAP. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the dates of the balance sheets and revenues and expenses for the periods then ended. Actual results could differ from those estimates. Our significant accounting policies are described below.

Principles of Consolidation

Principles of Consolidation

The Consolidated Financial Statements include the accounts of S&T and its wholly owned subsidiaries. All significant intercompany transactions have been eliminated in consolidation. Investments of 20 percent to 50 percent of the outstanding common stock of investees are accounted for using the equity method of accounting.

Reclassification

Reclassification

Certain amounts in prior years’ financial statements and footnotes have been reclassified to conform to the current year’s presentation. The reclassifications had no significant effect on our results of operations or financial condition.

Business Combinations

Business Combinations

We account for business combinations using the acquisition method of accounting. Under this method of accounting, the acquired company’s net assets are recorded at fair value at the date of acquisition, and the results of operations of the acquired company are combined with our results from that date forward. Acquisition costs are expensed when incurred. The difference between the purchase price and the fair value of the net assets acquired (including identified intangibles) is recorded as goodwill.

Fair Value Measurements

Fair Value Measurements

We use fair value measurements when recording and disclosing certain financial assets and liabilities. Securities available-for-sale, trading assets and derivatives are recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record other assets at fair value on a nonrecurring basis, such as loans held for sale, impaired loans, other real estate owned, or OREO, mortgage servicing rights, or MSRs, and certain other assets.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants at the measurement date. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities; it is not a forced transaction. In determining fair value, we use various valuation approaches, including market, income and cost approaches. The fair value standard establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing an asset or liability, which is developed, based on market data we have obtained from independent sources. Unobservable inputs reflect our estimates of assumptions that market participants would use in pricing an asset or liability, which are developed based on the best information available in the circumstances.

The fair value hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The fair value hierarchy is broken down into three levels based on the reliability of inputs as follows:

Level 1: valuation is based upon unadjusted quoted market prices for identical instruments traded in active markets.

Level 2: valuation is based upon quoted market prices for similar instruments traded in active markets, quoted market prices for identical or similar instruments traded in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by market data.

Level 3: valuation is derived from other valuation methodologies, including discounted cash flow models and similar techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in determining fair value.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Our policy is to recognize transfers between any of the fair value hierarchy levels at the end of the reporting period in which the transfer occurred.

The following are descriptions of the valuation methodologies that we use for financial instruments recorded at fair value on either a recurring or nonrecurring basis.

Recurring Basis

Securities Available-for-Sale

Securities available-for-sale include both debt and equity securities. We obtain fair values for debt securities from a third-party pricing service which utilizes several sources for valuing fixed-income securities. We validate prices received from our pricing service through comparison to a secondary pricing service and broker quotes. We review the methodologies of the pricing service which provides us with a sufficient understanding of the valuation models, assumptions, inputs and pricing to reasonably measure the fair value of our securities. The market evaluation sources for debt securities include observable inputs rather than significant unobservable inputs and are classified as Level 2. The service provider utilizes pricing models that vary by asset class and include available trade, bid and other market information. Generally, the methodologies include broker quotes, proprietary models, and vast descriptive terms and conditions databases, as well as extensive quality control programs.

Marketable equity securities that have an active, quotable market are classified as Level 1. Marketable equity securities that are quotable, but are thinly traded or inactive, are classified as Level 2 and securities that are not readily traded and do not have a quotable market are classified as Level 3.

Trading Assets

We use quoted market prices to determine the fair value of our trading assets. Our trading assets are held in a Rabbi Trust under a deferred compensation plan and are invested in readily quoted mutual funds. Accordingly, these assets are classified as Level 1.

Derivative Financial Instruments

We use derivative instruments, including interest rate swaps for commercial loans with our customers, interest rate lock commitments and the sale of mortgage loans in the secondary market. We calculate the fair value for derivatives using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. Each valuation considers the contractual terms of the derivative, including the period to maturity, and uses observable market based inputs, such as interest rate curves and implied volatilities. Accordingly, derivatives are classified as Level 2. We incorporate credit valuation adjustments into the valuation models to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in calculating fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements and collateral postings.

Nonrecurring Basis

Loans Held for Sale

Loans held for sale consist of 1-4 family residential loans originated for sale in the secondary market and, from time to time, certain loans transferred from the loan portfolio to loans held for sale, all of which are carried at the lower of cost or fair value. The fair value of 1-4 family residential loans is based on the principal or most advantageous market currently offered for similar loans using observable market data. The fair value of the loans transferred from the loan portfolio is based on the amounts offered for these loans in currently pending sales transactions. Loans held for sale carried at fair value are classified as Level 3.

Impaired Loans

Impaired loans are carried at the lower of carrying value or fair value. Fair value is determined as the recorded investment balance less any specific reserve. We establish a specific reserve based on the following three impairment methods: 1) the present value of expected future cash flows discounted at the loan’s original effective interest rate, 2) the loan’s observable market price or 3) the fair value of the collateral less estimated selling costs when the loan is collateral dependent and we expect to liquidate the collateral. However, if repayment is expected to come from the operation of the collateral, rather than liquidation, then we do not consider estimated selling costs in determining the fair value of the collateral. Collateral values are generally based upon appraisals by approved, independent state certified appraisers. Appraised values may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or our knowledge of the borrower and the borrower’s business. Impaired loans carried at fair value are classified as Level 3.

OREO and Other Repossessed Assets

OREO and other repossessed assets obtained in partial or total satisfaction of a loan are recorded at the lower of recorded investment in the loan or fair value less cost to sell. Subsequent to foreclosure, these assets are carried at the lower of the amount recorded at acquisition date or fair value less cost to sell. Accordingly, it may be necessary to record nonrecurring fair value adjustments. Fair value, when recorded, is generally based upon appraisals by approved, independent state certified appraisers. Like impaired loans, appraisals on OREO may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or other information available to us. OREO and other repossessed assets carried at fair value are classified as Level 3.

Mortgage Servicing Rights

The fair value of MSRs is determined by calculating the present value of estimated future net servicing cash flows, considering expected mortgage loan prepayment rates, discount rates, servicing costs and other economic factors, which are determined based on current market conditions. The expected rate of mortgage loan prepayments is the most significant factor driving the value of MSRs. MSRs are considered impaired if the carrying value exceeds fair value. The valuation model includes significant unobservable inputs; therefore, MSRs are classified as Level 3.

Other Assets

We measure certain other assets at fair value on a nonrecurring basis. Fair value is based on the application of lower of cost or fair value accounting, or write-downs of individual assets. Valuation methodologies used to measure fair value are consistent with overall principles of fair value accounting and consistent with those described above.

Financial Instruments

Financial Instruments

In addition to financial instruments recorded at fair value in our financial statements, fair value accounting guidance requires disclosure of the fair value of all of an entity’s assets and liabilities that are considered financial instruments. The majority of our assets and liabilities are considered financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and willing seller engaged in an exchange transaction. Also, it is our general practice and intent to hold our financial instruments to maturity and to not engage in trading or sales activities with respect to such financial instruments. For fair value disclosure purposes, we substantially utilize the fair value measurement criteria as required and explained above. In cases where quoted fair values are not available, we use present value methods to determine the fair value of our financial instruments.

Cash and Cash Equivalents

The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks, including interest-bearing deposits, approximate fair value.

Loans

The fair value of variable rate performing loans that may reprice frequently at short-term market rates is based on carrying values adjusted for credit risk. The fair value of variable rate performing loans that reprice at intervals of one year or longer, such as adjustable rate mortgage products, is estimated using discounted cash flow analyses that utilize interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of fixed rate performing loans is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of nonperforming loans is based on their carrying values less any specific reserve. The carrying amount of accrued interest approximates fair value.

Bank Owned Life Insurance

Fair value approximates net cash surrender value of bank owned life insurance, or BOLI.

Deposits

The fair values disclosed for deposits without defined maturities (e.g., noninterest and interest-bearing demand, money market and savings accounts) are by definition equal to the amounts payable on demand. The carrying amounts for variable rate, fixed-term time deposits approximate their fair values. Estimated fair values for fixed rate and other time deposits are based on discounted cash flow analysis using interest rates currently offered for time deposits with similar terms. The carrying amount of accrued interest approximates fair value.

Short-Term Borrowings

The carrying amounts of securities sold under repurchase agreements and other short-term borrowings approximate their fair values.

Long-Term Borrowings

The fair values disclosed for fixed rate long-term borrowings are determined by discounting their contractual cash flows using current interest rates for long-term borrowings of similar remaining maturities. The carrying amounts of variable rate long-term borrowings approximate their fair values.

Junior Subordinated Debt Securities

The variable rate junior subordinated debt securities reprice quarterly; therefore, the fair values approximate the carrying values.

Loan Commitments and Standby Letters of Credit

Off-balance sheet financial instruments consist of commitments to extend credit and letters of credit. Except for interest rate lock commitments, estimates of the fair value of these off-balance sheet items are not made because of the short-term nature of these arrangements and the credit standing of the counterparties.

Other

Estimates of fair value are not made for items that are not defined as financial instruments, including such items as our core deposit intangibles and the value of our trust operations.

Cash and Cash Equivalents

Cash and Cash Equivalents

We consider cash and due from banks, interest-bearing deposits with banks and federal funds sold as cash and cash equivalents.

Securities

Securities

We determine the appropriate classification of securities at the time of purchase. All securities, including both debt and equity securities, are classified as available-for-sale. These are securities that we intend to hold for an indefinite period of time, but that may be sold in response to changes in interest rates, prepayment risk, liquidity needs or other factors. Such securities are carried at fair value with net unrealized gains and losses deemed to be temporary, reported as a component of other comprehensive income (loss), net of tax. Realized gains and losses on the sale of available-for-sale securities and other-than-temporary impairment, or OTTI, charges are recorded within noninterest income in the Consolidated Statements of Net Income. Realized gains and losses on the sale of securities are determined using the specific-identification method. Bond premiums are amortized to the call date and bond discounts are accreted to the maturity date, both on a level yield basis.

An investment security is considered impaired if its fair value is less than its cost or amortized cost basis. We perform a quarterly review of our securities to identify those that may indicate an OTTI. Our policy for OTTI within the marketable equity securities portfolio generally requires an impairment charge when the security is in a loss position for 12 consecutive months, unless facts and circumstances would suggest the need for an OTTI prior to that time. Our policy for OTTI within the debt securities portfolio is based upon a number of factors, including but not limited to, the length of time and extent to which the estimated fair value has been less than cost, the financial condition of the underlying issuer, the ability of the issuer to meet contractual obligations, the best estimate of the impairment charge representing credit losses, the likelihood of the security’s ability to recover any decline in its estimated fair value and whether management intends to sell the security or if it is more likely than not that management will be required to sell the investment security prior to the security’s recovery. If the impairment is considered other-than-temporary based on management’s review, the impairment must be separated into credit and non-credit components. The credit component is recognized in the Consolidated Statements of Net Income and the non-credit component is recognized in other comprehensive income (loss), net of applicable taxes.

Loans Held for Sale

Loans Held for Sale

Loans held for sale consist of 1-4 family residential loans originated for sale in the secondary market and from time to time, certain loans transferred from the loan portfolio to loans held for sale, all of which are carried at the lower of cost or fair value. If a loan is transferred from the loan portfolio to the held-for-sale category, any write-down in the carrying amount of the loan at the date of transfer is recorded as a charge-off against the allowance for loan losses, or ALL. Subsequent declines in fair value are recognized as a charge to noninterest income. When a loan is placed in the held-for-sale category, we stop amortizing the related deferred fees and costs. The remaining unamortized fees and costs are recognized as part of the cost basis of the loan at the time it is sold. Gains and losses on sales of loans held for sale are included in other noninterest income in the Consolidated Statements of Net Income.

Loans

Loans

Loans are reported at the principal amount outstanding net of unearned income, unamortized premiums or discounts and deferred origination fees and costs. We defer certain nonrefundable loan origination and commitment fees. Accretion of discounts and amortization of premiums on loans are included in interest income in the Consolidated Statements of Net Income. Loan origination fees and direct loan origination costs are deferred and amortized as an adjustment of loan yield over the respective lives of the loans without consideration of anticipated prepayments. If a loan is paid off, the remaining unaccreted or unamortized net origination fees and costs are immediately recognized into income or expense. Interest is accrued and interest income is recognized on loans as earned.

Closed-end installment loans, amortizing loans secured by real estate and any other loans with payments scheduled monthly are reported past due when the borrower is in arrears two or more monthly payments. Other multi-payment obligations with payments scheduled other than monthly are reported past due when one scheduled payment is due and unpaid for 30 days or more.

Generally, consumer loans are charged off against the ALL upon the loan reaching 90 days past due. Commercial loans are charged off as management becomes aware of facts and circumstances that raise doubt as to the collectability of all or a portion of the principal and when we believe a confirmed loss exists.

Nonaccrual or Nonperforming Loans

Nonaccrual or Nonperforming Loans

We stop accruing interest on a loan (nonaccrual loan) when the borrower’s payment is 90 days past due. Loans are also placed on nonaccrual status when payment is not past due, but we have doubt about the borrower’s ability to comply with contractual repayment terms. When the interest accrual is discontinued, all unpaid accrued interest is reversed against interest income. Interest income is recognized on nonaccrual loans on a cash basis if recovery of the remaining principal is reasonably assured. As a general rule, a nonaccrual loan may be restored to accrual status when its principal and interest is paid current and the bank expects repayment of the remaining contractual principal and interest, or when the loan otherwise becomes well secured and in the process of collection.

Troubled Debt Restructurings

Troubled Debt Restructurings

Troubled debt restructurings, or TDRs, are loans where we, for economic or legal reasons related to a borrower’s financial difficulty, grant a concession to the borrower that we would not otherwise grant. We strive to identify borrowers in financial difficulty early and work with them to modify the terms before their loan reaches nonaccrual status. These modified terms generally include extensions of maturity dates at a stated interest rate lower than the current market rate for a new loan with similar risk characteristics, reductions in contractual interest rates or principal deferment. While unusual, there may be instances of principal forgiveness. These modifications are generally for longer term periods that would not be considered insignificant. Additionally, we classify loans where the debt obligation has been discharged through a Chapter 7 Bankruptcy and not reaffirmed as TDRs.

We individually evaluate all substandard commercial loans that experienced a forbearance or change in terms agreement, as well as all substandard consumer and residential mortgage loans that entered into an agreement to modify their existing loan to determine if they should be designated as TDRs.

All TDRs will be reported as impaired loans for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. Further, all impaired loans are reported as nonaccrual loans unless the loan is a TDR that has met the requirements to be returned to accruing status. TDRs can be returned to accruing status if the ultimate collectability of all contractual amounts due, according to the restructured agreement, is not in doubt and there is a period of a minimum of six months of satisfactory payment performance by the borrower either immediately before or after the restructuring.

Allowance for Loan Losses

Allowance for Loan Losses

The ALL reflects our estimates of probable losses inherent in the loan portfolio at the balance sheet date. The methodology for determining the ALL has two main components: evaluation and impairment tests of individual loans and evaluation and impairment tests of certain groups of homogeneous loans with similar risk characteristics.

A loan is considered impaired when it is probable that we will be unable to collect all principal and interest payments due according to the original contractual terms of the loan agreement. We individually evaluate all substandard and nonaccrual commercial loans greater than $0.5 million for impairment. All TDRs will be reported as an impaired loan for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. For all TDRs, regardless of size, as well as all other impaired loans, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate. Specific reserves are established based upon the following three impairment methods: 1) the present value of expected future cash flows discounted at the loan’s original effective interest rate, 2) the loan’s observable market price or 3) the estimated fair value of the collateral if the loan is collateral dependent. Our impairment evaluations consist primarily of the fair value of collateral method because most loans are collateral dependent. Collateral values are discounted to consider disposition costs when appropriate. A specific reserve is established or a charge-off is taken if the fair value of the impaired loan is less than the recorded investment in the loan balance.

The ALL for homogeneous loans is calculated using a systematic methodology with both a quantitative and a qualitative analysis that is applied on a quarterly basis. The ALL model is comprised of five distinct portfolio segments: 1) Commercial Real Estate, or CRE, 2) Commercial and Industrial, or C&I, 3) Commercial Construction, 4) Consumer Real Estate and 5) Other Consumer. Each segment has a distinct set of risk characteristics monitored by management. We further assess and monitor risk and performance at a more disaggregated level which includes our internal risk rating system for the commercial segments and type of collateral, lien position and loan-to-value, or LTV, for the consumer segments.

We first apply historical loss rates to pools of loans with similar risk characteristics. Loss rates are calculated by historical charge-offs that have occurred within each pool of loans over the loss emergence period, or LEP. The LEP is an estimate of the average amount of time from the point at which a loss is incurred on a loan to the point at which the loss is confirmed. In general, the LEP will be shorter in an economic slowdown or recession and longer during times of economic stability or growth, as customers are better able to delay loss confirmation after a potential loss event has occurred.

In conjunction with our annual review of the ALL assumptions, we have updated our study of LEPs for our commercial portfolio segments using our loan charge-off history. Our study showed that the LEP for our commercial construction portfolio has lengthened and that our current estimated LEPs for the CRE and C&I portfolio segments did not materially change.We estimate the LEP to be 3.5 years for CRE and commercial construction and 2.5 years for C&I. This is an increase from the prior LEP of 1.5 years for commercial construction.We believe that the LEPs for the consumer portfolio segments have also lengthened as they are influenced by the same improvement in economic conditions that has impacted the commercial portfolio segments over the past two years. We therefore also lengthened the LEP assumption for the consumer portfolio to 2.0 years. This is an increase from prior LEPs of 1.5 years for the consumer portfolio segment.

Another key assumption is the look-back period, or LBP, which represents the historical data period utilized to calculate loss rates. We lengthened the LBP for C&I, Commercial Construction and the consumer loan portfolio segments in order to capture relevant historical data believed to be reflective of losses inherent in the portfolios. We use a five and one quarter years LBP for our commercial portfolio segments and three and one quarter years LBP for our consumer portfolio segments.

After consideration of the historic loss calculations, management applies additional qualitative adjustments so that the ALL is reflective of the inherent losses that exist in the loan portfolio at the balance sheet date. Qualitative adjustments are made based upon changes in economic conditions, loan portfolio and asset quality data and credit process changes, such as credit policies or underwriting standards. The evaluation of the various components of the ALL requires considerable judgment in order to estimate inherent loss exposures.

The changes made to the ALL assumptions were applied prospectively and did not result in a material change to the total ALL. Lengthening the LEPs does increase the historical loss rates and therefore the quantitative component of the ALL. We believe this makes the quantitative component of the ALL more reflective of inherent losses that exist within the loan portfolio, which resulted in a decrease in the qualitative component of the ALL. The ALL at December 31, 2014 reflects these changes within the C&I, Commercial Construction and consumer portfolio segments.

Qualitative adjustments are aggregated into five categories, including process, economic conditions, loan portfolio, asset quality and other external factors.

Within the five aforementioned categories, the following qualitative factors are considered:

1) Changes in our lending policies and procedures, including underwriting standards, collection, charge-off and recovery practices not considered elsewhere in estimating credit losses;

2) Changes in national, regional, and local economic and business conditions and developments that affect the collectability of the portfolio, including the condition of various market segments;

3) Changes in the nature and volume of our loan portfolio and terms of loans;

4) Changes in the experience, ability and depth of our lending management and staff;

5) Changes in the volume and severity of past due loans, the volume of nonaccrual loans, and the volume and severity of adversely classified or graded loans;

6) Changes in the quality of our loan review system;

7) Changes in the value of the underlying collateral for collateral-dependent loans;

8) The existence and effect of any concentrations of credit and changes in the level of such concentrations; and

9) The effect of external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in our current loan portfolio.

Our ALL Committee meets quarterly to verify the overall adequacy of the ALL. Additionally, on an annual basis, the ALL Committee meets to validate our ALL model. This validation includes reviewing the pools of loans to ensure the segmentation results in relevant homogeneous pools of loans. The ALL Committee reviews the LEP and LBP used to calculate the loss rates. Further, the ALL Committee reviews the qualitative factors to ensure that both the categories, as noted above, and the range of qualitative adjustments remain appropriate. As a result of this ongoing monitoring process, we may make changes to our ALL assumptions to be responsive to the economic environment.

Bank Owned Life Insurance

Bank Owned Life Insurance

We have purchased life insurance policies on certain executive officers and employees. We receive the cash surrender value of each policy upon its termination or benefits are payable upon the death of the insured. Changes in net cash surrender value are recognized in noninterest income or expense in the Consolidated Statements of Net Income.

Premises and Equipment

Premises and Equipment

Premises and equipment, including leasehold improvements, are stated at cost less accumulated depreciation. Maintenance and repairs are charged to expense as incurred, while improvements that extend an asset’s useful life are capitalized and depreciated over the estimated remaining life of the asset. Depreciation expense is computed by the straight-line method for financial reporting purposes and accelerated methods for income tax purposes over the estimated useful lives of the particular assets. Management reviews long-lived assets using events and circumstances to determine if and when an asset is evaluated for recoverability.

The estimated useful lives for the various asset categories are as follows:

1) Land and Land Improvements	Non-depreciating assets
2)     Buildings	25 years
3)     Furniture and Fixtures	5 years
4)     Computer Equipment and Software	5 years or term of license
5)     Other Equipment	5 years
6)     Vehicles	5 years
7)     Leasehold Improvements	Lesser of estimated useful life of the asset (generally 15 years unless established otherwise) or the remaining term of the lease, including renewal options in the lease that are reasonably assured of exercise

Restricted Investment in Bank Stock

Restricted Investment in Bank Stock

Federal Home Loan Bank, or FHLB, stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. We hold FHLB stock because we are a member of the FHLB of Pittsburgh. The FHLB requires members to purchase and hold a specified level of FHLB stock based upon on the members asset value, level of borrowings and participation in other programs offered. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the low-cost products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of the FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value. Both cash and stock dividends are reported as income in taxable investment securities in the Consolidated Statements of Net Income. FHLB stock is evaluated for OTTI on a quarterly basis.

Atlantic Community Bankers’ Bank, or ACBB, stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the carrying value. We do not currently use their membership products and services. We acquired ACBB stock through various mergers of banks that were ACBB members. ACBB stock is evaluated for OTTI on a quarterly basis.

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

We have three reporting units: Community Banking, Insurance and Wealth Management. At December 31, 2014, we had goodwill of $175.8 million, including $171.6 million in Community Banking, representing 98 percent of total goodwill and $4.2 million in Insurance, representing two percent of total goodwill. The carrying value of goodwill is tested annually for impairment each October 1 or more frequently if it is determined that we should do so. We first assess qualitatively whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. Our qualitative assessment considers such factors as macroeconomic conditions, market conditions specifically related to the banking industry, our overall financial performance and various other factors. If we determine that it is more likely than not that the fair value is less than the carrying amount, we proceed to test for impairment. The evaluation for impairment involves comparing the current estimated fair value of each reporting unit to its carrying value, including goodwill. If the current estimated fair value of a reporting unit exceeds its carrying value, no additional testing is required and impairment loss is not recorded. If the estimated fair value of a reporting unit is less than the carrying value, further valuation procedures are performed and could result in impairment of goodwill being recorded. Further valuation procedures would include allocating the estimated fair value to all assets and liabilities of the reporting unit to determine an implied goodwill value. If the implied value of goodwill of a reporting unit is less than the carrying amount of that goodwill, an impairment loss is recognized in an amount equal to that excess.

We have core deposit and other intangible assets resulting from acquisitions which are subject to amortization. We determine the amount of identifiable intangible assets based upon independent core deposit and insurance contract analyses at the time of the acquisition. Intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable.

Variable Interest Entities

Variable Interest Entities

Variable interest entities, or VIEs, are legal entities that generally either do not have equity investors with voting rights or that have equity investors that do not provide sufficient financial resources for the entity to support its activities. When an enterprise has both the power to direct the economic activities of the VIE and the obligation to absorb losses of the VIE or the right to receive benefits of the VIE, the entity has a controlling financial interest in the VIE. A VIE often holds financial assets, including loans or receivables, or other property. The company with a controlling financial interest, the primary beneficiary, is required to consolidate the VIE into its consolidated balance sheets. S&T has one wholly-owned trust subsidiary, STBA Capital Trust I, or the Trust, for which it does not absorb a majority of expected losses or receive a majority of the expected residual returns. At its inception in 2008, the Trust issued floating rate trust preferred securities to the Trustee, another financial institution, and used the proceeds from the sale to invest in junior subordinated debt, which is the sole asset of the Trust. The Trust pays dividends on the trust preferred securities at the same rate as the interest we pay on our junior subordinated debt held by the Trust. Because the third-party investors are the primary beneficiaries, the Trust qualifies as a VIE. Accordingly, the Trust and its net assets are not included in our Consolidated Financial Statements. However, the junior subordinated debt issued by S&T is included in our Consolidated Balance Sheets.

Joint Ventures

Joint Ventures

We have made investments directly in Low Income Housing Tax Credit, or LIHTC, partnerships formed with third parties. As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties. These investments are amortized over a maximum of 10 years, which represents the period that the tax credits will be utilized. We have determined that we are not the primary beneficiary of these investments because the general partners have the power to direct the activities that most significantly impact the economic performance of the partnership and have both the obligation to absorb expected losses and the right to receive benefits.

OREO and Other Repossessed Assets

OREO and Other Repossessed Assets

OREO and other repossessed assets are included in other assets in the Consolidated Balance Sheets and are comprised of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of a foreclosure. At the time of foreclosure, these properties are recorded at the lower of the recorded investment in the loan or fair value less cost to sell. Loan losses arising from the acquisition of such property initially are charged against the ALL. Subsequently, these assets are carried at the lower of carrying value or current fair value less cost to sell. Gains or losses realized upon disposition of the asset are recorded in other expenses in the Consolidated Statements of Net Income.

Mortgage Servicing Rights

Mortgage Servicing Rights

MSRs are recognized as separate assets when commitments to fund a loan to be sold are made. Upon commitment, the MSR is established, which represents the then current estimated fair value of future net cash flows expected to be realized for performing the servicing activities. The estimated fair value of the MSRs is estimated by calculating the present value of estimated future net servicing cash flows, considering expected mortgage loan prepayment rates, discount rates, servicing costs and other economic factors, which are determined based on current market conditions. The expected rate of mortgage loan prepayments is the most significant factor driving the value of MSRs. Increases in mortgage loan prepayments reduce estimated future net servicing cash flows because the life of the underlying loan is reduced. In determining the estimated fair value of MSRs, mortgage interest rates, which are used to determine prepayment rates, are held constant over the estimated life of the portfolio. MSRs are reported in other assets in the Consolidated Balance Sheets and are amortized into noninterest income in the Consolidated Statements of Net Income in proportion to, and over the period of, the estimated future net servicing income of the underlying mortgage loans.

MSRs are regularly evaluated for impairment based on the estimated fair value of those rights. The MSRs are stratified by certain risk characteristics, primarily loan term and note rate. If temporary impairment exists within a risk stratification tranche, a valuation allowance is established through a charge to income equal to the amount by which the carrying value exceeds the estimated fair value. If it is later determined that all or a portion of the temporary impairment no longer exists for a particular tranche, the valuation allowance is reduced.

MSRs are also reviewed for OTTI. OTTI exists when the recoverability of a recorded valuation allowance is determined to be remote, taking into consideration historical and projected interest rates and loan pay-off activity. When this situation occurs, the unrecoverable portion of the valuation allowance is applied as a direct write-down to the carrying value of the MSR. Unlike a valuation allowance, a direct write-down permanently reduces the carrying value of the MSR and the valuation allowance, precluding subsequent recoveries.

Derivative Financial Instruments

Derivative Financial Instruments

Interest Rate Swaps

In accordance with applicable accounting guidance for derivatives and hedging, all derivatives are recognized as either assets or liabilities on the balance sheet at fair value. Interest rate swaps are contracts in which a series of interest rate flows (fixed and variable) are exchanged over a prescribed period. The notional amounts on which the interest payments are based are not exchanged. These derivative positions relate to transactions in which we enter into an interest rate swap with a commercial customer while at the same time entering into an offsetting interest rate swap with another financial institution. In connection with each transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a same notional amount at a fixed rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert a variable rate loan to a fixed rate loan with us receiving a variable rate. These agreements could have floors or caps on the contracted interest rates.

Pursuant to our agreements with various financial institutions, we may receive collateral or may be required to post collateral based upon mark-to-market positions. Beyond unsecured threshold levels, collateral in the form of cash or securities may be made available to counterparties of interest rate swap transactions. Based upon our current positions and related future collateral requirements relating to them, we believe any effect on our cash flow or liquidity position to be immaterial.

Derivatives contain an element of credit risk, the possibility that we will incur a loss because a counterparty, which may be a financial institution or a customer, fails to meet its contractual obligations. All derivative contracts with financial institutions may be executed only with counterparties approved by our Asset and Liability Committee, or ALCO, and derivatives with customers may only be executed with customers within credit exposure limits approved by our Senior Loan Committee. Interest rate swaps are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives are recorded in current earnings and included in other noninterest income in the Consolidated Statements of Net Income.

Interest Rate Lock Commitments and Forward Sale Contracts

In the normal course of business, we sell originated mortgage loans into the secondary mortgage loan market. We also offer interest rate lock commitments to potential borrowers. The commitments are generally for a period of 60 days and guarantee a specified interest rate for a loan if underwriting standards are met, but the commitment does not obligate the potential borrower to close on the loan. Accordingly, some commitments expire prior to becoming loans. We can encounter pricing risks if interest rates increase significantly before the loan can be closed and sold. We may utilize forward sale contracts in order to mitigate this pricing risk. Whenever a customer desires these products, a mortgage originator quotes a secondary market rate guaranteed for that day by the investor. The rate lock is executed between the mortgagee and us and in turn a forward sale contract may be executed between us and the investor. Both the rate lock commitment and the corresponding forward sale contract for each customer are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives during the commitment period are recorded in current earnings and included in mortgage banking in the Consolidated Statements of Net Income.

Allowance for Unfunded Commitments

Allowance for Unfunded Commitments

In the normal course of business, we offer off-balance sheet credit arrangements to enable our customers to meet their financing objectives. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. Our exposure to credit loss, in the event the customer does not satisfy the terms of the agreement, equals the contractual amount of the obligation less the value of any collateral. We apply the same credit policies in making commitments and standby letters of credit that are used for the underwriting of loans to customers. Commitments generally have fixed expiration dates, annual renewals or other termination clauses and may require payment of a fee. Because many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The allowance for unfunded commitments is included in other liabilities in the Consolidated Balance Sheets. The allowance for unfunded commitments is determined using a similar methodology as our ALL. The reserve is calculated by applying historical loss rates from our ALL model to the estimated future utilization of our unfunded commitments.

Treasury Stock

Treasury Stock

The repurchase of our common stock is recorded at cost. At the time of reissuance, the treasury stock account is reduced using the average cost method. Gains and losses on the reissuance of common stock are recorded in additional paid-in capital, to the extent additional paid-in capital from previous treasury share transactions exists. Any deficiency is charged to retained earnings.

Revenue Recognition

Revenue Recognition

We recognize revenues as they are earned based on contractual terms or as services are provided when collectability is reasonably assured. Our principal source of revenue is interest income, which is recognized on an accrual basis. Interest and dividend income, loan fees, trust fees, fees and charges on deposit accounts, insurance commissions and other ancillary income related to our deposits and lending activities are accrued as earned.

Wealth Management Fees

Wealth Management Fees

Assets held in a fiduciary capacity by the subsidiary bank, S&T Bank, are not our assets and are therefore not included in our Consolidated Financial Statements. Wealth management fee income is reported in the Consolidated Statements of Net Income on an accrual basis.

Stock-Based Compensation

Stock-Based Compensation

Stock-based compensation may include stock options and restricted stock which is measured using the fair value method of accounting. The grant date fair value is recognized over the period during which the recipient is required to provide service in exchange for the award. Stock option expense is determined utilizing the Black-Scholes model. Restricted stock expense is determined using the grant date fair value. We estimate expected forfeitures when stock-based awards are granted and record compensation expense only for awards that are expected to vest.

Pensions

Pensions

The expense for S&T Bank’s qualified and nonqualified defined benefit pension plans is actuarially determined using the projected unit credit actuarial cost method. It requires us to make economic assumptions regarding future interest rates and asset returns as well as various demographic assumptions. We estimate the discount rate used to measure benefit obligations by applying the projected cash flow for future benefit payments to a yield curve of high-quality corporate bonds available in the marketplace and by employing a model that matches bonds to our pension cash flows. The expected return on plan assets is an estimate of the long-term rate of return on plan assets, which is determined based on the current asset mix and estimates of return by asset class. We recognize in the Consolidated Balance Sheets an asset for the plan’s overfunded status or a liability for the plan’s underfunded status. Gains or losses related to changes in benefit obligations or plan assets resulting from experience different from that assumed are recognized as other comprehensive income (loss) in the period in which they occur. To the extent that such gains or losses exceed ten percent of the greater of the projected benefit obligation or plan assets, they are recognized as a component of pension costs over the future service periods of active plan participants. The funding policy for the qualified plan is to contribute an amount each year that is at least equal to the minimum required contribution as determined under the Pension Protection Act of 2006 and Moving Ahead for Progress in the 21st Century Act, but not more than the maximum amount permissible for taxable plan sponsors. Our nonqualified plans are unfunded.

Marketing Costs

Marketing Costs

We expense all marketing-related costs, including advertising costs, as incurred.

Income Taxes

Income Taxes

We estimate income tax expense based on amounts expected to be owed to the tax jurisdictions where we conduct business. On a quarterly basis, management assesses the reasonableness of our effective tax rate based upon our current estimate of the amount and components of net income, tax credits and the applicable statutory tax rates expected for the full year. We classify interest and penalties as an element of tax expense.

Deferred income tax assets and liabilities are determined using the asset and liability method and are reported in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax basis of assets and liabilities and recognizes enacted changes in tax rate and laws. When deferred tax assets are recognized, they are subject to a valuation allowance based on management’s judgment as to whether realization is more likely than not.

Accrued taxes represent the net estimated amount due to taxing jurisdictions and are reported in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. We evaluate and assess the relative risks and appropriate tax treatment of transactions and filing positions after considering statutes, regulations, judicial precedent and other information and maintain tax accruals consistent with the evaluation of these relative risks and merits. Changes to the estimate of accrued taxes occur periodically due to changes in tax rates, interpretations of tax laws, the status of examinations being conducted by taxing authorities and changes to statutory, judicial and regulatory guidance. These changes, when they occur, can affect deferred taxes and accrued taxes, as well as the current period’s income tax expense and can be significant to our operating results.

Tax positions are recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50 percent likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded.

Earnings Per Share

Earnings Per Share

Basic earnings per share, or EPS, is calculated using the two-class method to determine income allocated to common shareholders. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities under the two-class method. Income allocated to common shareholders is then divided by the weighted average number of common shares outstanding during the period. Potentially dilutive securities are excluded from the basic EPS calculation.

Diluted EPS is calculated under the more dilutive of either the treasury stock method or the two-class method. Under the treasury stock method, the weighted average number of common shares outstanding is increased by the potentially dilutive common shares. For the two-class method, diluted EPS is calculated for each class of shareholders using the weighted average number of shares attributed to each class. Potentially dilutive common shares are common stock equivalents relating to our outstanding warrants, stock options and restricted stock.

Recently Issued Accounting Standards

Recently Adopted Accounting Standards Updates, or ASU

Business Combinations (Topic 805): Pushdown Accounting

In November 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-17, Pushdown Accounting - Business Combinations (Topic 805). The ASU provides an acquired entity with an option to elect to apply pushdown accounting. The amendments of this ASU apply to the separate financial statements of an acquired entity and its subsidiaries that are a business activity upon the occurrence of an event in which an acquirer obtains control of the entity. Pushdown accounting refers to the use of the acquirer's basis in the preparation of the acquiree's separate financial statements. The new standard became effective upon issuance on November 18, 2014. The adoption of this ASU had no impact on our results of operations or financial position.

Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss or a Tax Credit Carryforward Exists

In July 2013, the FASB issued ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss or a Tax Credit Carryforward Exists. The ASU requires that entities should present an unrecognized tax benefit as a reduction of the deferred tax asset for a net operating loss, or NOL, or similar tax loss or tax credit carry forward rather than as a liability when the uncertain tax position would reduce the NOL or other carry forward under the tax law. The new standard is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013, and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. The adoption of this ASU had no impact on our results of operations or financial position.

Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date

In February 2013, the FASB issued ASU No. 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date. The ASU requires the measurement of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement with its co-obligors as well as any additional amount that the entity expects to pay on behalf of its co-obligors. The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2013, and early adoption is permitted. The adoption of this ASU had no impact on our results of operations or financial position.

Recently Issued Accounting Standards Updates not yet Adopted

Share-Based Payment Awards with Performance Targets

In June 2014, the FASB issued ASU No. 2014-12, Share-Based Payment Awards with Performance Targets. The main provisions of ASU 2014-12 require that a performance target included in a share-based payment award that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. Therefore, under the existing stock compensation guidance in Accounting Standards Codification Topic 718, the performance target should not be reflected in estimating the grant-date fair value of the award. The standard is effective for annual periods and interim periods beginning after December 15, 2015. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Repurchase-To-Maturity Transactions, Repurchase Financings and New Disclosures

In June 2014, the FASB issued ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings and New Disclosures to change the accounting for repurchase-to-maturity transactions and certain linked repurchase financings. This will result in accounting for both types of arrangements as secured borrowings on the balance sheet and require new disclosures to (i) increase transparency about the types of collateral pledged in secured borrowing transactions and (ii) enable users to better understand transactions in which the transferor retains substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction. The disclosure for repurchase agreements, securities lending transactions and repurchase-to-maturity transactions accounted for as secured borrowings is required to be presented for annual periods beginning after December 15, 2014, and for interim periods beginning after March 15, 2015. All other accounting and disclosure amendments in the ASU are effective for the first interim or annual period beginning after December 15, 2014. Earlier application for a public business entity is prohibited. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Revenues from Contracts with Customers

In May 2014, the FASB issued ASU No. 2014-09, Revenues from Contracts with Customers. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. The standard is required to be adopted by public business entities in annual periods beginning on or after December 15, 2016 including interim periods therein. The provisions do not apply to lease contracts, insurance contracts, financial instruments and other contractual rights or obligations (e.g. receivables, debt and equity securities, liabilities, debt, derivatives transfers, and servicing, etc.), guarantees, or non-monetary exchanges between entities. We are currently evaluating the impact of the adoption of this pronouncement on our consolidated financial statements; however, we do not expect that this ASU will have a material impact on our results of operations or financial position.

Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity

In April 2014, the FASB issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies related disclosure requirements. The guidance applies to all entities that dispose of components. It will significantly change current practices for assessing discontinued operations and affect an entity’s income and earnings per share from continuing operations. An entity is required to reclassify assets and liabilities of a discontinued operation that are classified as held for sale or disposed of in the current period for all comparative periods presented. The ASU requires that an entity present in the statement of cash flows or disclose in a note either total operating and investing cash flows for discontinued operations, or depreciation, amortization, capital expenditures and significant operating and investing noncash items related to discontinued operations. Additional disclosures are required when an entity retains significant continuing involvement with a discontinued operation after its disposal, including the amount of cash flows to and from a discontinued operation. The new standard applies prospectively effective for annual periods beginning on or after December 15, 2014 and interim periods therein, and early adoption is permitted. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure

In January 2014, the FASB issued ASU No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. The ASU clarifies that an in substance repossession or foreclosure has occurred and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure. Interim and annual disclosure is required of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure. The new standard is effective using either the modified retrospective transition method or a prospective transition method for fiscal years and interim periods within those years, beginning after December 15, 2014, and early adoption is permitted. We do not expect that this ASU will have a material impact on our results of operations or financial position.

Accounting for Investments in Qualified Affordable Housing Projects

In January 2014, the FASB issued ASU No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects. The ASU permits reporting entities to make an accounting policy election to account for investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. The proportional amortization method permits the amortization of the initial cost of the investment in proportion to the tax credits and other tax benefits received, and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2014, and early adoption is permitted. We do not expect that this ASU will have a material impact on our results of operations or financial position.

XML

Parent Company Condensed Financial Information - Statements of Net Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Information [Line Items]
Interest expense on long-term debt	$ 617	$ 746	$ 1,107
Other expenses	11,224	10,661	12,815
Net Income	57,910	50,539	34,200
Parent Company [Member]
Condensed Financial Information [Line Items]
Proceeds from Dividends Received	46,414	24,087	35,603
Investment income	19	15	17
Interest expense on long-term debt	759	769	808
Other expenses	2,014	2,579	1,800
Income before Equity in Undistributed Net Income of Subsidiaries	43,660	20,754	33,012
Bank subsidiary	13,351	29,926	1,371
Nonbank subsidiaries	899	(141)	(183)
Net Income	$ 57,910	$ 50,539	$ 34,200

XML

Fair Value Measurements - Assets Measured at Estimated Fair Value on Nonrecurring Basis by Fair Value Hierarchy (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Loans held for sale	$ 0	$ 1,516
Impaired loans	12,916	19,197
Other real estate owned	117	317
Mortgage servicing rights	2,934	1,025
Total Assets	15,967	22,055
Level 1 [Member]
ASSETS
Loans held for sale	0	0
Impaired loans	0	0
Other real estate owned	0	0
Mortgage servicing rights	0	0
Level 2 [Member]
ASSETS
Loans held for sale	0	0
Impaired loans	0	0
Other real estate owned	0	0
Mortgage servicing rights	0	0
Level 3 [Member]
ASSETS
Loans held for sale	0	1,516
Impaired loans	12,916	19,197
Other real estate owned	117	317
Mortgage servicing rights	2,934	1,025
Total Assets	$ 15,967	$ 22,055

XML

Short-Term Borrowings

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Short-Term Borrowings

SHORT-TERM BORROWINGS

Short-term borrowings are for terms under one year and were comprised of retail repurchase agreements, or REPOs, and FHLB advances. We define REPOs with our local retail customers as retail REPOs. Securities pledged as collateral under these REPO financing arrangements cannot be sold or repledged by the secured party and are therefore accounted for as a secured borrowing. FHLB advances are for various terms secured by a blanket lien on residential mortgages and other real estate secured loans.

The following table represents the composition of short-term borrowings, the weighted average interest rate as of December 31 and interest expense for the years ended December 31:

	2014						2013						2012
(dollars in thousands)	Balance		Weighted Average Interest Rate		Interest Expense		Balance		Weighted Average Interest Rate		Interest Expense		Balance		Weighted Average Interest Rate		Interest Expense
REPOs	$	30,605	0.01	%	$	3	$	33,847	0.01	%	$	62	$	62,582	0.20	%	$	82
FHLB advances	290,000		0.31	%	511		140,000		0.30	%	279		75,000		0.19	%	123
Total Short-term Borrowings	$	320,605	0.27	%	$	514	$	173,847	0.24	%	$	341	$	137,582	0.19	%	$	205

XML

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Estimated Useful Lives for Various Asset

1) Land and Land Improvements	Non-depreciating assets
2)     Buildings	25 years
3)     Furniture and Fixtures	5 years
4)     Computer Equipment and Software	5 years or term of license
5)     Other Equipment	5 years
6)     Vehicles	5 years
7)     Leasehold Improvements	Lesser of estimated useful life of the asset (generally 15 years unless established otherwise) or the remaining term of the lease, including renewal options in the lease that are reasonably assured of exercise

XML

Derivative Instruments and Hedging Activities - Amount of Gain or Loss Recognized in Income on Derivatives (Detail) (Not Designated as Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivative Gain (Loss)	$ 36	$ (474)	$ 371
Interest Rate Swap Contracts-Commercial Loans [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivative Gain (Loss)	(24)	(174)	101
Interest Rate Lock Commitments-Mortgage Loans [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivative Gain (Loss)	150	(382)	223
Forward Sale Contracts-Mortgage Loans [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivative Gain (Loss)	$ (90)	$ 82	$ 47

XML

Employee Benefits - Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of Net Periodic Pension Cost
Service cost-benefits earned during the period	$ 2,369	$ 2,767	$ 2,788
Interest cost on projected benefit obligation	4,470	3,985	4,358
Expected return on plan assets	(6,907)	(6,207)	(5,564)
Amortization of prior service cost (credit)	(137)	(138)	(137)
Recognized net actuarial loss	941	2,425	2,474
Net Periodic Pension Expense	736	2,832	3,919
Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss)
Net actuarial loss (gain)	13,294	(15,499)	2,477
Recognized net actuarial loss	(941)	(2,425)	(2,474)
Recognized prior service credit	137	138	137
Total (Before Tax Effects)	12,490	(17,786)	140
Total Recognized in Net Benefit Cost and Other Comprehensive Income (Loss) (Before Tax Effects)	$ 13,226	$ (14,954)	$ 4,059

XML

Commitments and Contingencies

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

Commitments

The following table sets forth our commitments and letters of credit as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Commitments to extend credit	$	1,158,628	$	1,038,529
Standby letters of credit	73,584		78,639
Total	$	1,232,212	$	1,117,168

Estimates of the fair value of these off-balance sheet items were not made because of the short-term nature of these arrangements and the credit standing of the counterparties.

Our allowance for unfunded loan commitments totaled $2.3 million at December 31, 2014 and $2.9 million at December 31, 2013.

We have future commitments with third party vendors for data processing and communication charges. We had data processing and communication expense of $9.8 million , $9.5 million and $10.3 million for 2014, 2013 and 2012. Included in the 2013 expense is $0.8 million in one-time merger related expense.

The following table sets forth the future estimated payments related to data processing and communication charges for each of the five years following December 31, 2014:

(dollars in thousands)	Total
2015	$	11,326
2016	10,715
2017	11,057
2018	11,411
2019	11,777
Total	$	56,286

Litigation

In the normal course of business, we are subject to various legal and administrative proceedings and claims. While any type of litigation contains a level of uncertainty, we believe that the outcome of such proceedings or claims pending will not have a material adverse effect on our consolidated financial position or results of operations.

XML

Dividend and Loan Restrictions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Apr. 30, 2012
Equity [Abstract]
Percentage of collateralized loans	10.00%
Line of credit		$ 5,000,000.0

XML

Long-Term Borrowings and Subordinated Debt - Schedule of Junior Subordinated Debt Securities and Interest Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Junior Subordinated Debentures [Line Items]
Balance	$ 45,619	$ 45,619	$ 90,619
Interest Expense	1,222	2,070	2,915
2006 Junior Subordinated Debt [Member]
Junior Subordinated Debentures [Line Items]
Balance	25,000	25,000	25,000
Interest Expense	463	475	523
2008 Junior Subordinated Debt-Trust Preferred Securities [Member]
Junior Subordinated Debentures [Line Items]
Balance	20,619	20,619	20,619
Interest Expense	759	770	808
2008 Junior Subordinated Debt [Member]
Junior Subordinated Debentures [Line Items]
Balance	0	0	20,000
Interest Expense	0	422	818
2008 Junior Subordinated Debt [Member]
Junior Subordinated Debentures [Line Items]
Balance	0	0	25,000
Interest Expense	$ 0	$ 403	$ 766

XML

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash dividends declared, per share (dollars per share)	$ 0.68	$ 0.61	$ 0.60
Common stock issued in acquisition, shares			1,483,327
Treasury stock, shares net	58,762	5,516	117,633
Common Stock [Member]
Common stock issued in acquisition, shares			1,483,327
Additional Paid-in Capital [Member]
Common stock issued in acquisition, shares			1,483,327
Retained Earnings [Member]
Cash dividends declared, per share (dollars per share)	$ 0.68	$ 0.61	$ 0.60
Treasury stock, shares net	58,762	5,516	117,633
Treasury Stock [Member]
Treasury stock, shares net	58,762	5,516	117,633

XML

Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Cash and due from banks, interest-bearing amounts	$ 57,048	$ 53,594
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	31,197,365	31,197,365
Common stock, shares outstanding	29,796,397	29,737,725
Treasury stock, shares	1,400,968	1,459,640

XML

Premises and Equipment

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Premises and Equipment

PREMISES AND EQUIPMENT

The following table is a summary of premises and equipment as of the dates presented:

	December 31,
(dollars in thousands)	2014			2013
Land	$	6,193		$	6,193
Premises	44,690			42,320
Furniture and equipment	26,661			25,139
Leasehold improvements	6,545			5,944
	84,089			79,596
Accumulated depreciation	(45,923		)	(42,981		)
Total	$	38,166		$	36,615

Depreciation expense related to premises and equipment was $3.5 million in 2014, $3.5 million in 2013 and $3.9 million in 2012.

Certain banking facilities are leased under arrangements expiring at various dates until the year 2054. We account for these leases on a straight-line basis due to escalation clauses. All leases are accounted for as operating leases, except for one capital lease. Rental expense for premises amounted to $2.7 million, $2.5 million and $2.4 million in 2014, 2013 and 2012. Included in the rental expense for premises are leases entered into with two S&T directors, which totaled $0.2 million each year in 2014, 2013 and 2012.

Minimum annual rental and renewal option payments for each of the following five years and thereafter are approximately:

(dollars in thousands)	Operating		Capital		Total
2015	$	2,274	$	76	$	2,350
2016	2,200		76		2,276
2017	2,178		76		2,254
2018	2,143		76		2,219
2019	2,156		77		2,233
Thereafter	40,352		687		41,039
Total	$	51,303	$	1,068	$	52,371

XML

Deposits - Scheduled Maturities of Certificates of Deposit (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]
2015	$ 628,889
2016	143,728
2017	230,051
2018	45,139
2019	30,295
Thereafter	8,015
Total	$ 1,086,117	$ 1,090,531

XML

Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 Event	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Acquisition of core deposits	$ 2,100,000
Acquisition of wealth management relationships	100,000
Acquisition of insurance contract relationships	400,000
Number of triggering events	0
Amortization expense on finite-lived intangible assets	$ 1,129,000	$ 1,591,000	$ 1,709,000

XML

Premises and Equipment - Minimum Annual Rental and Renewal Option Payments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Operating, 2015	$ 2,274
Operating, 2016	2,200
Operating, 2017	2,178
Operating, 2018	2,143
Operating, 2019	2,156
Operating, Thereafter	40,352
Operating, Total	51,303
Capital, 2015	76
Capital ,2016	76
Capital, 2017	76
Capital, 2018	76
Capital, 2019	77
Capital, Thereafter	687
Capital, Total	1,068
2015	2,350
2016	2,276
2017	2,254
2018	2,219
2019	2,233
Thereafter	41,039
Total	$ 52,371

XML

Employee Benefits - Actuarial Weighted Average Assumptions Used in Determining Benefit Obligation (Detail)	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Discount rate	4.00%	4.75%
Rate of compensation increase	3.00%	3.00%

XML

Parent Company Condensed Financial Information - Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Information [Line Items]
Net Income	$ 57,910	$ 50,539	$ 34,200
Tax (benefit) expense from stock-based compensation	300	200	300
Net Cash Provided by Operating Activities	78,103	86,076	83,890
Net Cash Used in Investing Activities	(437,048)	(309,683)	(8,323)
(Purchase) Sale of treasury shares, net			1,047
Cash dividends paid to common shareholders	(20,203)	(18,137)	(17,357)
Tax benefit (expense) from stock-based compensation	16	96	(30)
Net Cash Provided by (Used in) Financing Activities	360,169	(5,748)	(8,382)
Net increase (decrease) in cash	1,224	(229,355)	67,185
Cash and cash equivalents at beginning of year	108,356	337,711	270,526
Cash and Cash Equivalents at End of Year	109,580	108,356	337,711
Parent Company [Member]
Condensed Financial Information [Line Items]
Net Income	57,910	50,539	34,200
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	(14,250)	(29,785)	(1,188)
Tax (benefit) expense from stock-based compensation	(16)	(96)	30
Other	(106)	121	1,023
Net Cash Provided by Operating Activities	43,538	20,779	34,065
Net investments in subsidiaries	0	0	(5,035)
Acquisitions	0	0	(14,123)
Net Cash Used in Investing Activities	0	0	(19,158)
(Purchase) Sale of treasury shares, net	(163)	(88)	998
Cash dividends paid to common shareholders	(20,215)	(18,137)	(17,357)
Tax benefit (expense) from stock-based compensation	16	96	(30)
Net Cash Provided by (Used in) Financing Activities	(20,362)	(18,129)	(16,389)
Net increase (decrease) in cash	23,176	2,650	(1,482)
Cash and cash equivalents at beginning of year	14,852	12,202	13,684
Cash and Cash Equivalents at End of Year	$ 38,028	$ 14,852	$ 12,202

XML

Employee Benefits - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Number of consecutive years of employee's compensation	5 years
Number of total years of employee's compensation	10 years
Accumulated benefit obligation	$ 104,300,000	$ 88,300,000
Projected benefit obligation	113,124,000	95,969,000	102,454,000
Net periodic benefit cost	736,000	2,832,000	3,919,000
Fair value of asset transfer from Level 1 to Level 2 on recurring basis	0
Purchases, transfers or sales of level 3 plan assets	0
Pension Contributions	0
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	3,500,000	2,800,000
Net periodic benefit cost	400,000	400,000	500,000
Defined benefit plan in accumulated other comprehensive gain/loss before tax	2,100,000	1,500,000
Thrift Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to the Thrift Plan	3.50%
Compensation expense	1,300,000	1,400,000	1,300,000
Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Targeted asset allocation minimum	50.00%
Targeted asset allocation maximum	70.00%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Targeted asset allocation minimum	30.00%
Targeted asset allocation maximum	50.00%
Scenario, Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss included in accumulated other comprehensive income (loss)				(1,900,000)
Prior service credit expected recognized Amount				$ 100,000

XML

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 16, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Entity Registrant Name	S&T BANCORP INC
Entity Central Index Key	0000719220
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		29,796,397
Entity Public Float			$ 723,040,943

XML

Employee Benefits - Estimated Future Benefit Payments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
2015	$ 6,440
2016	6,437
2017	6,268
2018	6,719
2019	6,637
2020-2024	$ 38,984

XML

Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

GOODWILL AND OTHER INTANGIBLE ASSETS

The following table presents goodwill as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Balance at beginning of year	$	175,820	$	175,733
Additions	—		87
Balance at End of Year	$	175,820	$	175,820

Goodwill represents the excess of the purchase price over the fair value of net assets acquired. Goodwill is reviewed for impairment annually or more frequently if it is determined that a triggering event has occurred. Based upon our qualitative assessment performed for our annual impairment analysis, we concluded that it is more likely than not that the fair value of the reporting units exceeds the carrying value. In general, the overall macroeconomic conditions and more specifically the economic conditions of the banking industry have continued to improve. Additionally, our overall performance has improved and we did not identify any other facts and circumstances causing us to conclude that it is more likely than not that the fair value of the reporting units would be less than the carrying value.

The following table shows a summary of intangible assets as of the dates presented:

	December 31,
(dollars in thousands)	2014			2013
Gross carrying amount at beginning of year	$	16,401		$	16,401
Additions	—			—
Accumulated amortization	(13,770		)	(12,642		)
Balance at End of Year	$	2,631		$	3,759

Intangible assets as of December 31, 2014 consisted of $2.1 million for the acquisition of core deposits, $0.1 million for the acquisition of wealth management relationships and $0.4 million for the acquisition of insurance contract relationships. We determined the amount of identifiable intangible assets based upon independent core deposit, wealth management and insurance contract valuations. Other intangible assets are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. There were no triggering events in 2014 requiring an impairment analysis to be completed.

Amortization expense on finite-lived intangible assets totaled $1.1 million, $1.6 million and $1.7 million for 2014, 2013 and 2012. The following is a summary of the expected amortization expense for finite-lived intangibles assets, assuming no new additions, for each of the five years following December 31, 2014:

(dollars in thousands)	Amount
2015	$	883
2016	645
2017	500
2018	134
2019	122
Total	$	2,284

XML

Loans and Loans Held for Sale - Summary of Nonperforming Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Nonperforming Assets
Nonaccrual loans	$ 7,021	$ 12,387
Nonaccrual TDRs	5,436	10,067
Total nonaccrual loans	12,457	22,454
OREO	166	410
Total Nonperforming Assets	$ 12,623	$ 22,864

XML

Premises and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 3,465,000	$ 3,507,000	$ 3,912,000
Lease expiration year	Jan. 01, 2054
Rental expense	2,700,000	2,500,000	2,400,000
Rental expense for premises leases with two directors	$ 200,000	$ 200,000	$ 200,000

XML

Consolidated Statements of Net Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
INTEREST INCOME
Loans, including fees	$ 147,293	$ 142,492	$ 145,181
Investment Securities:
Taxable	8,983	7,478	7,544
Tax-exempt	3,857	3,401	3,121
Dividends	390	385	405
Total Interest Income	160,523	153,756	156,251
INTEREST EXPENSE
Deposits	10,128	11,406	16,796
Borrowings and junior subordinated debt securities	2,353	3,157	4,228
Total Interest Expense	12,481	14,563	21,024
NET INTEREST INCOME	148,042	139,193	135,227
Provision for loan losses	1,715	8,311	22,815
Net Interest Income After Provision for Loan Losses	146,327	130,882	112,412
NONINTEREST INCOME
Securities gains, net	41	5	3,016
Wealth management fees	11,343	10,696	9,808
Debit and credit card fees	10,781	10,931	11,134
Service charges on deposit accounts	10,559	10,488	9,992
Insurance fees	5,955	6,248	6,131
Gain on sale of merchant card servicing business	0	3,093	0
Mortgage banking	917	2,123	2,878
Other	6,742	7,943	8,953
Total Noninterest Income	46,338	51,527	51,912
NONINTEREST EXPENSE
Salaries and employee benefits	60,442	60,847	57,920
Data processing	8,737	8,263	7,326
Net occupancy	8,211	8,018	7,603
Furniture and equipment	5,317	4,883	5,262
Professional services and legal	3,717	4,184	4,610
Marketing	3,316	2,929	3,206
Other taxes	2,905	3,743	3,200
FDIC insurance	2,436	2,772	2,926
Business Combination, Acquisition Related Costs	689	838	5,968
Other	21,470	20,915	24,842
Total Noninterest Expense	117,240	117,392	122,863
Income Before Taxes	75,425	65,017	41,461
Provision for income taxes	17,515	14,478	7,261
Net Income Available to Common Shareholders	$ 57,910	$ 50,539	$ 34,200
Earnings per common share-basic (dollars per share)	$ 1.95	$ 1.70	$ 1.18
Earnings per common share-diluted (shares)	$ 1.95	$ 1.70	$ 1.18
Dividends declared per common share (dollars per share)	$ 0.68	$ 0.61	$ 0.60

XML

Restrictions on Cash and Due from Bank Accounts

12 Months Ended

Dec. 31, 2014

Cash and Cash Equivalents [Abstract]

Restrictions on Cash and Due from Bank Accounts

RESTRICTIONS ON CASH AND DUE FROM BANK ACCOUNTS

The Board of Governors of the Federal Reserve System, or the Federal Reserve, imposes certain reserve requirements on all depository institutions. These reserves are maintained in the form of vault cash or as an interest-bearing balance with the Federal Reserve. The required reserves averaged $41.8 million for the year ended 2014, $39.7 million for the year ended 2013 and $36.6 million for the year ended 2012.

XML

Fair Value Measurements

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

FAIR VALUE MEASUREMENTS

The following tables present our assets and liabilities that are measured at fair value on a recurring basis by fair value hierarchy level at December 31, 2014 and 2013. There were no transfers between Level 1 and Level 2 for items measured at fair value on a recurring basis during the periods presented.

	December 31, 2014
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Securities available-for-sale:
U.S. Treasury securities	$	—	$	14,880	$	—	$	14,880
Obligations of U.S. government corporations and agencies	—		269,285		—		269,285
Collateralized mortgage obligations of U.S. government corporations and agencies	—		118,006		—		118,006
Residential mortgage-backed securities of U.S. government corporations and agencies	—		46,668		—		46,668
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		39,673		—		39,673
Obligations of states and political subdivisions	—		142,702		—		142,702
Marketable equity securities	178		8,881		—		9,059
Total securities available-for-sale	178		640,095		—		640,273
Trading securities held in a Rabbi Trust	3,456		—		—		3,456
Total securities	3,634		640,095		—		643,729
Derivative financial assets:
Interest rate swaps	—		12,981		—		12,981
Interest rate lock commitments	—		235		—		235
Total Assets	$	3,634	$	653,311	$	—	$	656,945
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	$	—	$	12,953	$	—	$	12,953
Forward sale contracts	—		57		—		57
Total Liabilities	$	—	$	13,010	$	—	$	13,010

	December 31, 2013
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Securities available-for-sale:
Obligations of U.S. government corporations and agencies	$	—	$	234,751	$	—	$	234,751
Collateralized mortgage obligations of U.S. government corporations and agencies	—		63,774		—		63,774
Residential mortgage-backed securities of U.S. government corporations and agencies	—		48,669		—		48,669
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		39,052		—		39,052
Obligations of states and political subdivisions	—		114,264		—		114,264
Marketable equity securities	202		8,713		—		8,915
Total securities available-for-sale	202		509,223		—		509,425
Trading securities held in a Rabbi Trust	2,864		—		—		2,864
Total securities	3,066		509,223		—		512,289
Derivative financial assets:
Interest rate swaps	—		13,698		—		13,698
Interest rate lock commitments	—		85		—		85
Forward sales contracts	—		34		—		34
Total Assets	$	3,066	$	523,040	$	—	$	526,106
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	—		13,647		—		13,647
Total Liabilities	$	—	$	13,647	$	—	$	13,647

We classify financial instruments as Level 3 when valuation models are used because significant inputs are not observable in the market. The following table presents the changes in assets measured at fair value on a recurring basis for which we have utilized Level 3 inputs to determine the fair value:

	Years ended December 31,
(dollars in thousands)	2014		2013
Balance at beginning of year	$	—	$	300
Total gains included in other comprehensive income (loss)(1)	—		44
Net purchases, sales, issuances and settlements	—		—
Transfers out of Level 3	—		(344		)
Balance at End of Year	$	—	$	—

(1) Changes in estimated fair value of available-for-sale investments are recorded in accumulated other comprehensive income (loss) while gains and losses from sales are recorded in security gains (losses), net in the Consolidated Statements of Net Income.

In the second quarter of 2013, $0.3 million was transferred out of Level 3 into Level 2 as a result of a security becoming listed on a national securities exchange. There were no Level 3 liabilities measured at fair value on a recurring basis for any of the periods presented.

We may be required to measure certain assets and liabilities on a nonrecurring basis. Nonrecurring assets are recorded at the lower of cost or fair value in our financial statements. There were no liabilities measured at fair value on a nonrecurring basis at December 31, 2014 and 2013. The following table presents our assets that are measured at fair value on a nonrecurring basis by the fair value hierarchy level as of the dates presented:

	December 31, 2014								December 31, 2013
(dollars in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
ASSETS(1)
Loans held for sale	$	—	$	—	$	—	$	—	$	—	$	—	$	1,516	$	1,516
Impaired loans	—		—		12,916		12,916		—		—		19,197		19,197
Other real estate owned	—		—		117		117		—		—		317		317
Mortgage servicing rights	—		—		2,934		2,934		—		—		1,025		1,025
Total Assets	$	—	$	—	$	15,967	$	15,967	$	—	$	—	$	22,055	$	22,055

(1) This table presents only the nonrecurring items that are recorded at fair value in our financial statements.

The carrying values and fair values of our financial instruments at December 31, 2014 and 2013 are presented in the following tables:

			Fair Value Measurements at December 31, 2014
(dollars in thousands)	Carrying Value(1)		Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	109,580	$	109,580	$	109,580	$	—	$	—
Securities available-for-sale	640,273		640,273		178		640,095		—
Loans held for sale	2,970		2,991		—		—		2,991
Portfolio loans, net of unearned income	3,868,746		3,827,634		—		—		3,827,634
Bank owned life insurance	62,252		62,252		—		62,252		—
FHLB and other restricted stock	15,135		15,135		—		—		15,135
Trading securities held in a Rabbi Trust	3,456		3,456		3,456		—		—
Mortgage servicing rights	2,817		2,934		—		—		2,934
Interest rate swaps	12,981		12,981		—		12,981		—
Interest rate lock commitments	235		235		—		235		—
LIABILITIES
Deposits	$	3,908,842	$	3,910,342	$	—	$	—	$	3,910,342
Securities sold under repurchase agreements	30,605		30,605		—		—		30,605
Short-term borrowings	290,000		290,000		—		—		290,000
Long-term borrowings	19,442		20,462		—		—		20,462
Junior subordinated debt securities	45,619		45,619		—		—		45,619
Interest rate swaps	12,953		12,953		—		12,953		—
Forward sale contracts	57		57				57

(1) As reported in the Consolidated Balance Sheets

			Fair Value Measurements at December 31, 2013
(dollars in thousands)	Carrying Value(1)		Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	108,356	$	108,356	$	108,356	$	—	$	—
Securities available-for-sale	509,425		509,425		202		509,223		—
Loans held for sale	2,136		2,139		—		—		2,139
Portfolio loans, net of unearned income	3,566,199		3,538,072		—		—		3,538,072
Bank owned life insurance	60,480		60,480		—		60,480		—
FHLB and other restricted stock	13,629		13,629		—		—		13,629
Trading securities held in a Rabbi Trust	2,864		2,864		2,864		—		—
Mortgage servicing rights	2,919		3,143		—		—		3,143
Interest rate swaps	13,698		13,698		—		13,698		—
Interest rate lock commitments	85		85		—		85		—
Forward sale contracts	34		34		—		34		—
LIABILITIES
Deposits	$	3,672,308	$	3,673,624	$	—	$	—	$	3,673,624
Securities sold under repurchase agreements	33,847		33,847		—		—		33,847
Short-term borrowings	140,000		140,000		—		—		140,000
Long-term borrowings	21,810		22,924		—		—		22,924
Junior subordinated debt securities	45,619		45,619		—		—		45,619
Interest rate swaps	13,647		13,647		—		13,647		—

(1) As reported in the Consolidated Balance Sheets

XML

Long-Term Borrowings and Subordinated Debt

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Long-Term Borrowings and Subordinated Debt

LONG-TERM BORROWINGS AND SUBORDINATED DEBT

Our long-term borrowings at the Pittsburgh FHLB as of December 31, 2014 and 2013 were $19.3 million and $21.6 million. FHLB borrowings are collateralized by a blanket lien on residential mortgages and other real estate secured loans. Total loans pledged as collateral at the FHLB were $2.3 billion at year end 2014. The FHLB has eliminated the requirement that it may require collateral delivery for any portion of credit exposure that exceeds 70 percent of maximum borrowing capacity. We were eligible to borrow up to an additional $1.3 billion based on qualifying collateral, to a maximum borrowing capacity of $1.6 billion.

The following table represents the balance of long-term borrowings, the weighted average interest rate as of December 31 and interest expense for the years ended December 31:

(dollars in thousand)	2014			2013			2012
Long-term borrowings	$	19,442		$	21,810		$	34,101
Weighted average interest rate	3.00		%	3.01		%	3.17		%
Interest expense	$	617		$	746		$	1,107

Scheduled annual maturities and average interest rates for all of our long-term debt, including a capital lease of $0.2 million, for each of the five years and thereafter subsequent to December 31, 2014 are as follows:

(dollars in thousands)	Balance		Average Rate
2015	$	2,399	3.41	%
2016	2,330		3.44	%
2017	2,412		3.53	%
2018	2,496		3.67	%
2019	2,514		3.13	%
Thereafter	7,291		2.20	%
Total	$	19,442	2.97	%

Junior Subordinated Debt Securities

The following table represents the composition of junior subordinated debt securities at December 31 and the interest expense for the years ended December 31:

	2014				2013				2012
(dollars in thousands)	Balance		Interest Expense		Balance		Interest Expense		Balance		Interest Expense
2006 Junior subordinated debt	$	25,000	$	463	$	25,000	$	475	$	25,000	$	523
2008 Junior subordinated debt—trust preferred securities	20,619		759		20,619		770		20,619		808
2008 Junior subordinated debt	—		—		—		422		20,000		818
2008 Junior subordinated debt	—		—		—		403		25,000		766
Total	$	45,619	$	1,222	$	45,619	$	2,070	$	90,619	$	2,915

The following table summarizes the key terms of our junior subordinated debt securities:

(dollars in thousands)	2006 Junior Subordinated Debt	2008 Trust Preferred Securities	2008 Junior Subordinated Debt	2008 Junior Subordinated Debt
Junior Subordinated Debt	$25,000	—	$20,000	$25,000
Trust Preferred Securities	—	$20,619	—	—
Stated Maturity Date	12/15/2036	3/15/2038	6/15/2018	5/30/2018
Optional redemption date at par	Any time after 9/15/2011	Any time after 3/15/2013	Any time after 6/15/2013	Any time after 5/30/2013
Regulatory Capital	Tier 2	Tier 1	Tier 2	Tier 2
Interest Rate	3 month LIBOR plus 160 bps	3 month LIBOR plus 350 bps	3 month LIBOR plus 350 bps	3 month LIBOR plus 250 bps
Interest Rate at December 31, 2014	1.84%	3.74%	—%	—%

We completed a private placement of the trust preferred securities to a financial institution during the first quarter of 2008. As a result, we own 100 percent of the common equity of STBA Capital Trust I. The trust was formed to issue mandatorily redeemable capital securities to third-party investors. The proceeds from the sale of the securities and the issuance of the common equity by STBA Capital Trust I were invested in junior subordinated debt securities issued by us. The third party investors are considered the primary beneficiaries; therefore, the trust qualifies as a VIE, but is not consolidated into our financial statements. STBA Capital Trust I pays dividends on the securities at the same rate as the interest paid by us on the junior subordinated debt held by STBA Capital Trust I.

We repaid $45.0 million of junior subordinated debt in June 2013 because of its diminishing regulatory capital benefit and the future positive impact on net interest income. We replaced the funding primarily with FHLB short-term advances.

XML

Derivative Instruments and Hedging Activities

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

The following table indicates the amount representing the value of derivative assets and derivative liabilities at December 31:

	Derivatives (included in Other Assets)				Derivatives (included in Other Liabilities)
(dollars in thousands)	2014		2013		2014		2013
Derivatives not Designated as Hedging Instruments
Interest Rate Swap Contracts—Commercial Loans
Fair value	$	12,981	$	13,698	$	12,953	$	13,647
Notional amount	245,152		261,754		245,152		261,754
Collateral posted	—		—		12,059		12,611
Interest Rate Lock Commitments—Mortgage Loans
Fair value	235		85		—		—
Notional amount	8,822		3,989		—		—
Forward Sale Contracts—Mortgage Loans
Fair value	—		34		57		—
Notional amount	—		5,250		7,789		—

The following table indicates the gross amounts of commercial loan swap derivative assets and derivative liabilities, the amounts offset and the carrying values in the Consolidated Balance Sheets at December 31:

	Derivatives (included in Other Assets)						Derivatives (included in Other Liabilities)
(dollars in thousands)	2014			2013			2014			2013
Derivatives not Designated as Hedging Instruments
Gross amounts recognized	$	13,203		$	14,012		$	13,175		$	13,961
Gross amounts offset	(222		)	(314		)	(222		)	(314		)
Net amounts presented in the Consolidated Balance Sheets	12,981			13,698			12,953			13,647
Gross amounts not offset(1)	—			—			(12,059		)	(12,611		)
Net Amount	$	12,981		$	13,698		$	894		$	1,036

(1) Amounts represent posted collateral.

The following table indicates the gain or loss recognized in income on derivatives for the years ended December 31:

(dollars in thousands)	2014			2013			2012
Derivatives not Designated as Hedging Instruments
Interest rate swap contracts—commercial loans	$	(24	)	$	(174	)	$	101
Interest rate lock commitments—mortgage loans	150			(382		)	223
Forward sale contracts—mortgage loans	(90		)	82			47
Total Derivative Gain (Loss)	$	36		$	(474	)	$	371

XML

Allowance for Loan Losses - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Evaluation for impairment of substandard and nonaccrual commercial loans	500,000
Total amount of all impaired loans	43,977,000	52,856,000
Commercial real estate impaired loans current appraisals	0
Commercial real estate impaired loans needing current appraisals	0
Minimum [Member]
Financing Receivable, Impaired [Line Items]
Loans considered nonperforming (in days)	90 days
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Total amount of all impaired loans	19,890,000	$ 26,968,000

XML

Loans and Loans Held for Sale

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Loans and Loans Held for Sale

LOANS AND LOANS HELD FOR SALE

Loans are presented net of unearned income of $2.1 million and $1.3 million at December 31, 2014 and 2013. The following table indicates the composition of the loans as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Commercial
Commercial real estate	$	1,682,236	$	1,607,756
Commercial and industrial	994,138		842,449
Commercial construction	216,148		143,675
Total Commercial Loans	2,892,522		2,593,880
Consumer
Residential mortgage	489,586		487,092
Home equity	418,563		414,195
Installment and other consumer	65,567		67,883
Consumer construction	2,508		3,149
Total Consumer Loans	976,224		972,319
Total Portfolio Loans	3,868,746		3,566,199
Loans held for sale	2,970		2,136
Total Loans	$	3,871,716	$	3,568,335

We attempt to limit our exposure to credit risk by diversifying our loan portfolio by segment, collateral and industry and actively managing concentrations. When concentrations exist in certain segments, we mitigate this risk by monitoring the relevant economic indicators and internal risk rating trends and through stress testing of the loans in these segments. Total commercial loans represented 75 percent of total portfolio loans at December 31, 2014 and 73 percent of total portfolio loans at December 31, 2013. Within our commercial portfolio, CRE and Commercial Construction portfolios combined comprise 66 percent of total commercial loans and 49 percent of total portfolio loans at December 31, 2014 and 68 percent of total commercial loans and 49 percent of total portfolio loans at December 31, 2013. Further segmentation of the CRE and Commercial Construction portfolios by industry and collateral type reveal no concentration in excess of nine percent of total loans at either December 31, 2014 or December 31, 2013.

Our market area includes Pennsylvania and the contiguous states of Ohio, West Virginia, New York and Maryland. The majority of our commercial and consumer loans are made to businesses and individuals in this market area resulting in a geographic concentration. We believe our knowledge and familiarity with customers and conditions locally outweighs this geographic concentration risk. The conditions of the local and regional economies are monitored closely through publicly available data as well as information supplied by our customers. Management believes underwriting guidelines, active monitoring of economic conditions and ongoing review by credit administration mitigates the concentration risk present in the loan portfolio. Our CRE and Commercial Construction portfolios have out of market exposure of 8 percent of the combined portfolio and 3.9 percent of total loans at December 31, 2014 and 7.9 percent of the combined portfolio and 3.9 percent of total loans at December 31, 2013.

TDRs are loans where we, for economic or legal reasons related to a borrower's financial difficulties, grant a concession to the borrower that we would not otherwise grant. We strive to identify borrowers in financial difficulty early and work with them to modify the terms before their loan reaches nonaccrual status. These modified terms generally include extensions of maturity dates at a stated interest rate lower than the current market rate for a new loan with similar risk characteristics, reductions in contractual interest rates or principal deferment. While unusual, there may be instances of principal forgiveness. These modifications are generally for longer term periods that would not be considered insignificant. Additionally, we classify loans where the debt obligation has been discharged through a Chapter 7 Bankruptcy and not reaffirmed as TDRs.

We individually evaluate all substandard commercial loans that have experienced a forbearance or change in terms agreement, as well as all substandard consumer and residential mortgage loans that entered into an agreement to modify their existing loan to determine if they should be designated as TDRs. All TDRs are considered to be impaired loans and will be reported as impaired loans for the remaining life of the loan, unless the restructuring agreement specifies and interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. Further, all impaired loans are reported as nonaccrual loans unless the loan is a TDR that has met the requirements to be returned to accruing status. TDRs can be returned to accruing status if the ultimate collectability of all contractual amounts due, according to the restructured agreement, is not in doubt and there is a period of a minimum of six months of satisfactory payment performance by the borrower either immediately before or after the restructuring.

The following table summarizes the restructured loans as of the dates presented:

	December 31, 2014						December 31, 2013
(dollars in thousands)	Performing TDRs		Nonperforming TDRs		Total TDRs		Performing TDRs		Nonperforming TDRs		Total TDRs
Commercial real estate	$	16,939	$	2,180	$	19,119	$	19,711	$	3,898	$	23,609
Commercial and industrial	8,074		356		8,430		7,521		1,884		9,405
Commercial construction	5,736		1,869		7,605		5,338		2,708		8,046
Residential mortgage	2,839		459		3,298		2,581		1,356		3,937
Home equity	3,342		562		3,904		3,924		218		4,142
Installment and other consumer	53		10		63		154		3		157
Total	$	36,983	$	5,436	$	42,419	$	39,229	$	10,067	$	49,296

The following tables present the restructured loans for the 12 months ended December 31:

	2014
(dollars in thousands)	Number of Loans	Pre-Modification Outstanding Recorded Investment(1)		Post-Modification Outstanding Recorded Investment(1)		Total Difference in Recorded Investment
Commercial real estate
Principal deferral	4	$	1,991	$	1,965	$	26
Commercial and industrial
Principal deferral	2	$	381	$	356	$	25
Commercial construction
Maturity date extension	1	1,019		974		45
Residential mortgage
Chapter 7 bankruptcy(2)	9	651		634		17
Home equity
Maturity date extension	6	349		348		1
Interest rate reduction and maturity date extension	2	96		95		1
Chapter 7 bankruptcy(2)	15	432		382		50
Installment and other consumer
Chapter 7 bankruptcy(2)	5	30		23		7
Total by Concession Type
Principal deferral	6	2,372		2,321		51
Interest rate reduction and maturity date extension	2	96		95		1
Maturity date extension	7	1,368		1,322		46
Chapter 7 bankruptcy(2)	29	1,113		1,039		74
Total	44	$	4,949	$	4,777	$	172

(1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end.

(2) Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.

	2013
(dollars in thousands)	Number of Loans	Pre-Modification Outstanding Recorded Investment(1)		Post-Modification Outstanding Recorded Investment(1)		Total Difference in Recorded Investment
Commercial real estate
Principal deferral	4	$	2,772	$	2,494	$	(278	)
Interest rate reduction and maturity date extension	2	664		636		(28		)
Principal forgiveness (2)	1	4,339		4,216		(123		)
Maturity date extension	1	219		219		—
Chapter 7 bankruptcy(3)	6	227		190		(37		)
Commercial and industrial
Principal deferral	2	$	670	$	638	$	(32	)
Maturity date extension	1	751		739		(12		)
Chapter 7 bankruptcy(3)	1	3		1		(2		)
Residential mortgage
Principal deferral	2	153		149		(4		)
Interest rate reduction	1	54		54		—
Chapter 7 bankruptcy(3)	8	617		592		(25		)
Home Equity
Principal deferral	1	174		17		(157		)
Chapter 7 bankruptcy(3)	30	1,032		982		(50		)
Installment and other consumer
Chapter 7 bankruptcy(3)	11	104		91		(13		)
Total by Concession Type
Principal deferral	9	3,769		3,298		(471		)
Interest rate reduction	1	54		54		—
Interest rate reduction and maturity date extension	2	664		636		(28		)
Principal forgiveness (2)	1	4,339		4,216		(123		)
Maturity date extension	2	970		958		(12		)
Chapter 7 bankruptcy(3)	56	1,983		1,856		(127		)
Total	71	$	11,779	$	11,018	$	(761	)

(1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end.

(2) This loan had debt forgiveness of $0.1 million to the customer; however, the loan was previously charged-off to a balance below the actual contractual balance.

(3) Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.

During 2014, we modified six loans that were not considered to be TDRs, including four C&I loans for $3.2 million and two CRE loans for $1.2 million. The modifications primarily represented instances where we were adequately compensated through additional collateral or a higher interest rate or there was an insignificant delay in payment. As of December 31, 2014, we have no commitments to lend additional funds on any TDRs.

We returned nine TDRs to accruing status during the twelve months ended December 31, 2014 totaling $1.9 million. We returned six TDRs to accruing status during 2013 totaling $6.9 million.

Defaulted TDRs are loans having a payment default of 90 days or more after the restructuring takes place. The following table is a summary of TDRs which defaulted during the years ended December 31, 2014 and 2013 that had been restructured within the last 12 months prior to defaulting:

	Defaulted TDRs
	For the Year Ended December 31, 2014			For the Year Ended December 31, 2013
(dollars in thousands)	Number of Defaults	Recorded Investment		Number of Defaults	Recorded Investment
Commercial real estate	—	$	—	1	$	75
Commercial and industrial	—	—		2	438
Residential real estate	1	20		8	607
Home equity	2	44		6	193
Total	3	$	64	17	$	1,313

The following table is a summary of nonperforming assets as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Nonperforming Assets
Nonaccrual loans	$	7,021	$	12,387
Nonaccrual TDRs	5,436		10,067
Total nonaccrual loans	12,457		22,454
OREO	166		410
Total Nonperforming Assets	$	12,623	$	22,864

OREO consists of five properties and is included in other assets in the Consolidated Balance Sheets. It is our policy to obtain OREO appraisals on an annual basis.

We have granted loans to certain officers and directors of S&T as well as to certain affiliates of the officers and directors in the ordinary course of business. These loans were made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with unrelated persons and did not involve more than normal risk of collectability.

The following table presents a summary of the aggregate amount of loans to any such persons as of December 31:

(dollars in thousands)	2014			2013
Balance at beginning of year	$	23,848		$	36,075
New loans	27,799			22,534
Repayments	(24,279		)	(34,761		)
Balance at End of Year	$	27,368		$	23,848

XML

Summary of Significant Accounting Policies - Estimated Useful Lives for Various Asset (Detail)	12 Months Ended
	Dec. 31, 2014
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, description	Non-depreciating assets
Buildings [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	25 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	5 years
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	5 years
Other Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	5 years
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, years	15 years

XML

Commitments and Contingencies - Commitments and Letters of Credit (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Commitment And Contingencies [Line Items]
Commitments and letters of credit	$ 1,232,212	$ 1,117,168
Commitments to Extend Credit [Member]
Commitment And Contingencies [Line Items]
Commitments and letters of credit	1,158,628	1,038,529
Standby Letters of Credit [Member]
Commitment And Contingencies [Line Items]
Commitments and letters of credit	$ 73,584	$ 78,639

XML

Dividend and Loan Restrictions

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Dividend and Loan Restrictions

DIVIDEND AND LOAN RESTRICTIONS

S&T is a legal entity separate and distinct from its banking and other subsidiaries. A substantial portion of our revenues consist of dividend payments we receive from S&T Bank. S&T Bank, in turn, is subject to state laws and regulations that limit the amount of dividends it can pay to us. In addition, both S&T and S&T Bank are subject to various general regulatory policies relating to the payment of dividends, including requirements to maintain adequate capital above regulatory minimums. The Federal Reserve has indicated that banking organizations should generally pay dividends only if (i) the organization’s net income available to common shareholders over the past year has been sufficient to fully fund the dividends and (ii) the prospective rate of earnings retention appears consistent with the organization’s capital needs, asset quality and overall financial condition. Thus, under certain circumstances based upon our financial condition, our ability to declare and pay quarterly dividends may require consultation with the Federal Reserve and may be prohibited by applicable Federal Reserve guidelines.

Federal law prohibits us from borrowing from S&T Bank unless such loans are collateralized by specific obligations. Further, such loans are limited to 10 percent of S&T Bank’s capital stock and surplus. In April 2012, we closed a $5.0 million line of credit with S&T Bank that had been secured by investments of another subsidiary of S&T.

XML

Securities Available-for-Sale

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Securities Available-for-Sale

SECURITIES AVAILABLE-FOR-SALE

The following tables present the amortized cost and fair value of available-for-sale securities as of the dates presented:

	December 31, 2014									December 31, 2013
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Treasury securities	$	14,873	$	7	$	—		$	14,880	$	—	$	—	$	—		$	—
Obligations of U.S. government corporations and agencies	268,029		2,334		(1,078		)	269,285		235,181		2,151		(2,581		)	234,751
Collateralized mortgage obligations of U.S. government corporations and agencies	116,897		1,257		(148		)	118,006		63,776		601		(603		)	63,774
Residential mortgage-backed securities of U.S. government corporations and agencies	45,274		1,548		(154		)	46,668		47,934		1,420		(685		)	48,669
Commercial mortgage-backed securities of U.S. government corporations and agencies	39,834		232		(393		)	39,673		40,357		—		(1,305		)	39,052
Obligations of states and political subdivisions	136,977		5,789		(64		)	142,702		115,572		1,294		(2,602		)	114,264
Debt Securities	621,884		11,167		(1,837		)	631,214		502,820		5,466		(7,776		)	500,510
Marketable equity securities	7,579		1,480		—			9,059		7,579		1,336		—			8,915
Total	$	629,463	$	12,647	$	(1,837	)	$	640,273	$	510,399	$	6,802	$	(7,776	)	$	509,425

The following table shows the composition of gross and net realized gains and losses for the periods presented:

	Years ended December 31,
(dollars in thousands)	2014		2013		2012
Gross realized gains	$	41	$	5	$	3,027
Gross realized losses	—		—		(11		)
Net Realized Gains	$	41	$	5	$	3,016

The following tables present the fair value and the age of gross unrealized losses by investment category as of the dates presented:

	December 31, 2014
	Less Than 12 Months						12 Months or More							Total
(dollars in thousands)	Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses
Obligations of U.S. government corporations and agencies	4	$	39,745	$	(207	)	8	$	63,149	$	(871	)	12	$	102,894	$	(1,078	)
Collateralized mortgage obligations of U.S. government corporations and agencies	1	9,323		(148		)	—	—		—			1	9,323		(148		)
Residential mortgage-backed securities of U.S. government corporations and agencies	—	—		—			1	8,982		(154		)	1	8,982		(154		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	1	9,998		(25		)	2	20,640		(368		)	3	30,638		(393		)
Obligations of states and political subdivisions	1	263		(1		)	2	10,756		(63		)	3	11,019		(64		)
Total Temporarily Impaired Securities	7	$	59,329	$	(381	)	13	$	103,527	$	(1,456	)	20	$	162,856	$	(1,837	)

	December 31, 2013
	Less Than 12 Months						12 Months or More							Total
(dollars in thousands)	Number of Securities	Fair  Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses
Obligations of U.S. government corporations and agencies	16	$	126,017	$	(2,581	)	—	$	—	$	—		16	$	126,017	$	(2,581	)
Collateralized mortgage obligations of U.S. government corporations and agencies	3	39,522		(603		)	—	—		—			3	39,522		(603		)
Residential mortgage-backed securities of U.S. government corporations and agencies	2	22,822		(685		)	—	—		—			2	22,822		(685		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	4	39,052		(1,305		)	—	—		—			4	39,052		(1,305		)
Obligations of states and political subdivisions	16	47,529		(1,739		)	2	10,088		(863		)	18	57,617		(2,602		)
Total Temporarily Impaired Securities	41	$	274,942	$	(6,913	)	2	$	10,088	$	(863	)	43	$	285,030	$	(7,776	)

We do not believe any individual unrealized loss as of December 31, 2014 represents an OTTI. As of December 31, 2014, the unrealized losses on 20 debt securities were primarily attributable to changes in interest rates and not related to the credit quality of these securities. All debt securities are determined to be investment grade and are paying principal and interest according to the contractual terms of the security. There were no unrealized losses on marketable equity securities. We do not intend to sell and it is more likely than not that we will not be required to sell any of the securities in an unrealized loss position before recovery of their amortized cost.

The following table displays net unrealized gains and losses, net of tax on securities available for sale included in accumulated other comprehensive income/(loss) for the periods presented:

	December 31, 2014							December 31, 2013
(dollars in thousands)	Gross Unrealized Gains		Gross Unrealized Losses			Net Unrealized Gains/(Losses)		Gross Unrealized Gains		Gross Unrealized Losses			Net Unrealized Gains/(Losses)
Total unrealized gains/(losses) on securities available for sale	$	12,647	$	(1,837	)	$	10,810	$	6,802	$	(7,776	)	$	(974	)
Income tax expense/(benefit)	4,426		(643		)	3,783		2,381		(2,722		)	(341		)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	$	8,221	$	(1,194	)	$	7,027	$	4,421	$	(5,054	)	$	(633	)

The amortized cost and fair value of securities available-for-sale at December 31, 2014 by contractual maturity are included in the table below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

	December 31, 2014
(dollars in thousands)	Amortized Cost		Fair Value
Due in one year or less	$	21,137	$	21,339
Due after one year through five years	196,589		197,183
Due after five years through ten years	101,013		102,788
Due after ten years	101,140		105,557
	419,879		426,867
Collateralized mortgage obligations of U.S. government corporations and agencies	116,897		118,006
Residential mortgage-backed securities of U.S. government corporations and agencies	45,274		46,668
Commercial mortgage-backed securities of U.S. government corporations and agencies	39,834		39,673
Debt Securities	621,884		631,214
Marketable equity securities	7,579		9,059
Total	$	629,463	$	640,273

At December 31, 2014 and 2013, securities with carrying values of $289.1 million and $243.2 million were pledged for various regulatory and legal requirements.

XML

Segments - Financial Information of Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Interest income	$ 41,381	$ 40,605	$ 39,872	$ 38,665	$ 38,779	$ 38,581	$ 38,553	$ 37,843	$ 160,523	$ 153,756	$ 156,251
Interest expense	3,315	3,076	3,017	3,074	3,125	3,307	3,957	4,174	12,481	14,563	21,024
Net interest income									148,042	139,193	135,227
Provision for loan losses	1,106	1,454	(1,134)	289	1,562	3,419	1,023	2,307	1,715	8,311	22,815
Noninterest income	11,220	11,931	11,731	11,415	11,312	12,539	12,867	14,804	46,338	51,527	51,912
Noninterest expense									112,646	112,294	117,242
Depreciation expense									3,465	3,507	3,912
Amortization of intangible assets									1,129	1,591	1,709
Provision (benefit) for income taxes	3,963	4,906	4,875	3,771	4,098	4,207	3,951	2,222	17,515	14,478	7,261
Net Income									57,910	50,539	34,200
Operating Segments [Member] | Community Banking [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Interest income									160,403	153,450	155,865
Interest expense									13,989	16,508	22,135
Net interest income									146,414	136,942	133,730
Provision for loan losses									1,715	8,311	22,815
Noninterest income									29,443	34,649	36,422
Noninterest expense									97,733	94,769	100,474
Depreciation expense									3,387	3,430	3,833
Amortization of intangible assets									1,039	1,492	1,600
Provision (benefit) for income taxes									16,311	14,180	7,420
Net Income									55,672	49,409	34,010
Operating Segments [Member] | Insurance [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Interest income									2	2	1
Interest expense											0
Net interest income									2	2	1
Noninterest income									5,279	5,483	5,262
Noninterest expense									4,313	5,210	5,569
Depreciation expense									51	47	48
Amortization of intangible assets									51	51	52
Provision (benefit) for income taxes									303	(47)	(242)
Net Income									563	224	(164)
Operating Segments [Member] | Wealth Management [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Interest income									518	517	454
Net interest income									518	517	454
Noninterest income									11,297	10,662	9,788
Noninterest expense									9,173	9,850	9,717
Depreciation expense									27	30	31
Amortization of intangible assets									39	48	57
Provision (benefit) for income taxes									901	345	83
Net Income									1,675	906	354
Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Interest income									(400)	(213)	(69)
Interest expense									(1,508)	(1,945)	(1,111)
Net interest income									1,108	1,732	1,042
Noninterest income									319	733	440
Noninterest expense									1,427	2,465	1,482
Provision (benefit) for income taxes									$ 0	$ 0	$ 0

XML

Allowance for Loan Losses

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Allowance for Loan Losses

ALLOWANCE FOR LOAN LOSSES

We maintain an ALL at a level determined to be adequate to absorb estimated probable credit losses inherent in the loan portfolio as of the balance sheet date. We develop and document a systematic ALL methodology based on the following portfolio segments: 1) CRE, 2) C&I, 3) Commercial Construction, 4) Consumer Real Estate and 5) Other Consumer.

The following are key risks within each portfolio segment:

CRE—Loans secured by commercial purpose real estate, including both owner occupied properties and investment properties for various purposes such as hotels, strip malls and apartments. Operations of the individual projects as well as global cash flows of the debtors are the primary sources of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the collateral type as well as the business prospects of the lessee, if the project is not owner occupied.

C&I—Loans made to operating companies or manufacturers for the purpose of production, operating capacity, accounts receivable, inventory or equipment financing. Cash flow from the operations of the company is the primary source of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the industry of the company. Collateral for these types of loans often do not have sufficient value in a distressed or liquidation scenario to satisfy the outstanding debt.

Commercial Construction—Loans made to finance construction of buildings or other structures, as well as to finance the acquisition and development of raw land for various purposes. While the risk of these loans is generally confined to the construction period, if there are problems, the project may not be complete, and as such, may not provide sufficient cash flow on its own to service the debt or have sufficient value in a liquidation to cover the outstanding principal. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the type of project and the experience and resources of the developer.

Consumer Real Estate—Loans secured by first and second liens such as home equity loans, home equity lines of credit and 1-4 family residences, including purchase money mortgages. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The state of the local housing market can also have a significant impact on this segment because low demand and/or declining home values can limit the ability of borrowers to sell a property and satisfy the debt.

Other Consumer—Loans made to individuals that may be secured by assets other than 1-4 family residences, as well as unsecured loans. This segment includes auto loans, unsecured loans and lines and credit cards. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The value of the collateral, if there is any, is less likely to be a source of repayment due to less certain collateral values.

We further assess risk within each portfolio segment by pooling loans with similar risk characteristics. For the commercial loan classes, the most important indicator of risk is the internally assigned risk rating, including pass, special mention and substandard. Consumer loans are pooled by type of collateral, lien position and LTV ratio for Consumer Real Estate loans. Historical loss rates are applied to these loan pools to determine the reserve for loans collectively evaluated for impairment.

The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented:

	December 31, 2014
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non- performing		Total Past Due Loans		Total Loans
Commercial real estate	$	1,674,930	$	2,548	$	323	$	4,435	$	7,306	$	1,682,236
Commercial and industrial	991,136		1,227		153		1,622		3,002		994,138
Commercial construction	214,174		—		—		1,974		1,974		216,148
Residential mortgage	485,465		565		1,220		2,336		4,121		489,586
Home equity	414,303		1,756		445		2,059		4,260		418,563
Installment and other consumer	65,111		352		73		31		456		65,567
Consumer construction	2,508		—		—		—		—		2,508
Total	$	3,847,627	$	6,448	$	2,214	$	12,457	$	21,119	$	3,868,746

	December 31, 2013
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non- performing		Total Past Due Loans		Total Loans
Commercial real estate	$	1,595,590	$	1,209	$	207	$	10,750	$	12,166	$	1,607,756
Commercial and industrial	836,276		2,599		278		3,296		6,173		842,449
Commercial construction	139,133		1,049		751		2,742		4,542		143,675
Residential mortgage	481,260		828		1,666		3,338		5,832		487,092
Home equity	408,777		2,468		659		2,291		5,418		414,195
Installment and other consumer	67,420		382		44		37		463		67,883
Consumer construction	3,149		—		—		—		—		3,149
Total	$	3,531,605	$	8,535	$	3,605	$	22,454	$	34,594	$	3,566,199

We continually monitor the commercial loan portfolio through an internal risk rating system. Loan risk ratings are assigned based upon the creditworthiness of the borrower and are reviewed on an ongoing basis according to our internal policies. Loans within the pass rating generally have a lower risk of loss than loans risk rated as special mention and substandard.

Our risk ratings are consistent with regulatory guidance and are as follows:

Pass—The loan is currently performing and is of high quality.

Special Mention—A special mention loan has potential weaknesses that warrant management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects or in the strength of our credit position at some future date. Economic and market conditions, beyond the borrower’s control, may in the future necessitate this classification.

Substandard—A substandard loan is not adequately protected by the net worth and/or paying capacity of the borrower or by the collateral pledged, if any. Substandard loans have a well-defined weakness, or weaknesses that jeopardize the liquidation of the debt. These loans are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected.

The following tables present the recorded investment in commercial loan classes by internally assigned risk ratings as of the dates presented:

	December 31, 2014
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	1,635,132	97.2	%	$	948,663	95.4	%	$	196,520	90.9	%	$	2,780,315	96.1	%
Special mention	23,597		1.4	%	30,357		3.1	%	12,014		5.6	%	65,968		2.3	%
Substandard	23,507		1.4	%	15,118		1.5	%	7,614		3.5	%	46,239		1.6	%
Total	$	1,682,236	100.0	%	$	994,138	100.0	%	$	216,148	100.0	%	$	2,892,522	100.0	%

	December 31, 2013
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	1,519,720	94.5	%	$	792,029	94.0	%	$	119,177	82.9	%	$	2,430,926	93.7	%
Special mention	57,073		3.6	%	34,085		4.1	%	15,621		10.9	%	106,779		4.1	%
Substandard	30,963		1.9	%	16,335		1.9	%	8,877		6.2	%	56,175		2.2	%
Total	$	1,607,756	100.0	%	$	842,449	100.0	%	$	143,675	100.0	%	$	2,593,880	100.0	%

We monitor the delinquent status of the consumer portfolio on a monthly basis. Loans are considered nonperforming when interest and principal are 90 days or more past due or management has determined that a material deterioration in the borrower’s financial condition exists. The risk of loss is generally highest for nonperforming loans.

The following tables present the recorded investment in consumer loan classes by performing and nonperforming status as of the dates presented:

	December 31, 2014
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	487,250	99.5	%	$	416,504	99.5	%	$	65,536	99.9	%	$	2,508	100.0	%	$	971,798	99.5	%
Nonperforming	2,336		0.5	%	2,059		0.5	%	31		0.1	%	—		—	%	4,426		0.5	%
Total	$	489,586	100.0	%	$	418,563	100.0	%	$	65,567	100.0	%	$	2,508	100.0	%	$	976,224	100.0	%

	December 31, 2013
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	483,754	99.3	%	$	411,904	99.4	%	$	67,846	99.9	%	$	3,149	100.0	%	$	966,653	99.4	%
Nonperforming	3,338		0.7	%	2,291		0.6	%	37		0.1	%	—		—	%	5,666		0.6	%
Total	$	487,092	100.0	%	$	414,195	100.0	%	$	67,883	100.0	%	$	3,149	100.0	%	$	972,319	100.0	%

We individually evaluate all substandard and nonaccrual commercial loans greater than $0.5 million for impairment. Loans are considered to be impaired when based upon current information and events it is probable that we will be unable to collect all principal and interest payments due according to the original contractual terms of the loan agreement. All TDRs will be reported as an impaired loan for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is expected that the remaining principal and interest will be fully collected according to the restructured agreement. For all TDRs, regardless of size, as well as all other impaired loans, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate.

The following table presents investments in loans considered to be impaired and related information on those impaired loans as of the dates presented:

	December 31, 2014						December 31, 2013
(dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—	$	—	$	—
Commercial and industrial	—		—		—		—		—		—
Commercial construction	—		—		—		681		1,383		25
Consumer real estate	43		43		43		53		53		53
Other consumer	20		20		11		33		33		19
Total with a Related Allowance Recorded	63		63		54		767		1,469		97
Without a related allowance recorded:
Commercial real estate	19,890		25,262		—		26,968		35,474		—
Commercial and industrial	9,218		9,449		—		9,580		9,703		—
Commercial construction	7,605		11,293		—		7,391		12,353		—
Consumer real estate	7,159		7,733		—		8,026		9,464		—
Other consumer	42		48		—		124		128		—
Total without a Related Allowance Recorded	43,914		53,785		—		52,089		67,122		—
Total:
Commercial real estate	19,890		25,262		—		26,968		35,474		—
Commercial and industrial	9,218		9,449		—		9,580		9,703		—
Commercial construction	7,605		11,293		—		8,072		13,736		25
Consumer real estate	7,202		7,776		43		8,079		9,517		53
Other consumer	62		68		11		157		161		19
Total	$	43,977	$	53,848	$	54	$	52,856	$	68,591	$	97

The following table summarizes investments in loans considered to be impaired and related information on those impaired loans for the years presented:

	For the Year Ended
	December 31, 2014				December 31, 2013
(dollars in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	1,895	$	—
Commercial and industrial	—		—		—		—
Commercial construction	—		—		1,652		49
Consumer real estate	48		4		60		6
Other consumer	24		2		24		4
Total with a Related Allowance Recorded	72		6		3,631		59
Without a related allowance recorded:
Commercial real estate	20,504		684		29,314		929
Commercial and industrial	9,246		241		11,439		254
Commercial construction	8,145		227		14,112		326
Consumer real estate	7,027		396		8,714		436
Other consumer	56		2		114		6
Total without a Related Allowance Recorded	44,978		1,550		63,693		1,951
Total:
Commercial real estate	20,504		684		31,209		929
Commercial and industrial	9,246		241		11,439		254
Commercial construction	8,145		227		15,764		375
Consumer real estate	7,074		400		8,774		442
Other consumer	81		4		138		10
Total	$	45,050	$	1,556	$	67,324	$	2,010

The following tables detail activity in the ALL for the periods presented:

	2014
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of year	$	18,921		$	14,433		$	5,374		$	6,362		$	1,165		$	46,255
Charge-offs	(2,041		)	(1,267		)	(712		)	(1,200		)	(1,133		)	(6,353		)
Recoveries	1,798			3,647			146			350			353			6,294
Net (Charge-offs)/ Recoveries	(243		)	2,380			(566		)	(850		)	(780		)	(59		)
Provision for loan losses	1,486			(3,145		)	1,285			821			1,268			1,715
Balance at End of Year	$	20,164		$	13,668		$	6,093		$	6,333		$	1,653		$	47,911

	2013
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of year	$	25,246		$	7,759		$	7,500		$	5,058		$	921		$	46,484
Charge-offs	(4,601		)	(2,714		)	(4,852		)	(2,407		)	(1,002		)	(15,576		)
Recoveries	3,388			2,142			531			651			324			7,036
Net (Charge-offs)/ Recoveries	(1,213		)	(572		)	(4,321		)	(1,756		)	(678		)	(8,540		)
Provision for loan losses	(5,112		)	7,246			2,195			3,060			922			8,311
Balance at End of Year	$	18,921		$	14,433		$	5,374		$	6,362		$	1,165		$	46,255

The following tables present the ALL and recorded investments in loans by category as of December 31:

	2014
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	20,164	$	20,164	$	19,890	$	1,662,346	$	1,682,236
Commercial and industrial	—		13,668		13,668		9,218		984,920		994,138
Commercial construction	—		6,093		6,093		7,605		208,543		216,148
Consumer real estate	43		6,290		6,333		7,202		903,455		910,657
Other consumer	11		1,642		1,653		62		65,505		65,567
Total	$	54	$	47,857	$	47,911	$	43,977	$	3,824,769	$	3,868,746

	2013
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	18,921	$	18,921	$	26,968	$	1,580,788	$	1,607,756
Commercial and industrial	—		14,433		14,433		9,580		832,869		842,449
Commercial construction	25		5,349		5,374		8,072		135,603		143,675
Consumer real estate	53		6,309		6,362		8,079		896,357		904,436
Other consumer	19		1,146		1,165		157		67,726		67,883
Total	$	97	$	46,158	$	46,255	$	52,856	$	3,513,343	$	3,566,199

XML

Fair Value Measurements - Changes in Assets Classified as Level 3 in Fair Value Hierarchy (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Balance at beginning of year		$ 0	$ 300
Total gains included in other comprehensive income (loss)		0	44
Net purchases, sales, issuances and settlements		0	0
Transfers out of Level 3	300	0	(344)
Balance at End of Year			$ 0

XML

Employee Benefits - Benefit Obligation and Plan Assets Deriving Funded Status, in Other Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in Projected Benefit Obligation
Projected benefit obligation at beginning of year	$ 95,969	$ 102,454
Service cost	2,369	2,767	2,788
Interest cost	4,470	3,985	4,358
Actuarial loss (gain)	(16,020)	7,167
Benefits paid	(5,704)	(6,070)
Projected Benefit Obligation at End of Year	113,124	95,969	102,454
Change in Plan Assets
Fair value of plan assets at beginning of year	89,556	81,088
Actual return on plan assets	9,634	14,538
Benefits paid	(5,704)	(6,070)
Fair Value of Plan Assets at End of Year	93,486	89,556	81,088
Funded Status	$ (19,638)	$ (6,413)

XML

Allowance for Loan Losses - Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	$ 976,224	$ 972,319
% of Total	100.00%	100.00%
Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	971,798	966,653
% of Total	99.50%	99.40%
Non Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	4,426	5,666
% of Total	0.50%	0.60%
Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	489,586	487,092
% of Total	100.00%	100.00%
Residential Mortgage [Member] | Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	487,250	483,754
% of Total	99.50%	99.30%
Residential Mortgage [Member] | Non Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	2,336	3,338
% of Total	0.50%	0.70%
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	418,563	414,195
% of Total	100.00%	100.00%
Home Equity [Member] | Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	416,504	411,904
% of Total	99.50%	99.40%
Home Equity [Member] | Non Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	2,059	2,291
% of Total	0.50%	0.60%
Installment and Other Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	65,567	67,883
% of Total	100.00%	100.00%
Installment and Other Consumer [Member] | Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	65,536	67,846
% of Total	99.90%	99.90%
Installment and Other Consumer [Member] | Non Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	31	37
% of Total	0.10%	0.10%
Consumer Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	2,508	3,149
% of Total	100.00%	100.00%
Consumer Construction [Member] | Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	2,508	3,149
% of Total	100.00%	100.00%
Consumer Construction [Member] | Non Performing Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded investment in consumer loan	$ 0	$ 0
% of Total	0.00%	0.00%

XML

Fair Value Measurements - Carrying Values and Fair Values of Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Securities available-for-sale	$ 640,273	$ 509,425
Federal Home Loan Bank and other restricted stock, at cost	15,135	13,629
LIABILITIES
Junior subordinated debt securities	45,619	45,619	90,619
Carrying Value [Member]
ASSETS
Cash and due from banks, including interest-bearing deposits	109,580	108,356
Securities available-for-sale	640,273	509,425
Loans held for sale	2,970	2,136
Portfolio loans, net of unearned income	3,868,746	3,566,199
Bank owned life insurance	62,252	60,480
Federal Home Loan Bank and other restricted stock, at cost	15,135	13,629
Trading securities held in a Rabbi Trust	3,456	2,864
Mortgage servicing rights	2,817	2,919
LIABILITIES
Deposits	3,908,842	3,672,308
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	30,605	33,847
Short-term Debt, Fair Value	290,000	140,000
Long-term Debt, Fair Value	19,442	21,810
Junior subordinated debt securities	45,619	45,619
Carrying Value [Member] | Interest Rate Swaps [Member]
ASSETS
Derivative financial assets	12,981	13,698
LIABILITIES
Derivative financial liabilities	12,953	13,647
Carrying Value [Member] | Interest Rate Lock Commitments [Member]
ASSETS
Derivative financial assets	235	85
Carrying Value [Member] | Forward Sale Contracts [Member]
ASSETS
Derivative financial assets		34
LIABILITIES
Derivative financial liabilities	57
Fair Value Measurements [Member]
ASSETS
Cash and due from banks, including interest-bearing deposits	109,580	108,356
Securities available-for-sale	640,273	509,425
Loans held for sale	2,991	2,139
Portfolio loans, net of unearned income	3,827,634	3,538,072
Bank owned life insurance	62,252	60,480
Federal Home Loan Bank and other restricted stock, at cost	15,135	13,629
Trading securities held in a Rabbi Trust	3,456	2,864
Mortgage servicing rights	2,934	3,143
LIABILITIES
Deposits	3,910,342	3,673,624
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	30,605	33,847
Short-term Debt, Fair Value	290,000	140,000
Long-term Debt, Fair Value	20,462	22,924
Junior subordinated debt securities	45,619	45,619
Fair Value Measurements [Member] | Level 1 [Member]
ASSETS
Cash and due from banks, including interest-bearing deposits	109,580	108,356
Securities available-for-sale	178	202
Trading securities held in a Rabbi Trust	3,456	2,864
Fair Value Measurements [Member] | Level 2 [Member]
ASSETS
Securities available-for-sale	640,095	509,223
Bank owned life insurance	62,252	60,480
Fair Value Measurements [Member] | Level 3 [Member]
ASSETS
Securities available-for-sale		0
Loans held for sale	2,991	2,139
Portfolio loans, net of unearned income	3,827,634	3,538,072
Federal Home Loan Bank and other restricted stock, at cost	15,135	13,629
Mortgage servicing rights	2,934	3,143
LIABILITIES
Deposits	3,910,342	3,673,624
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	30,605	33,847
Short-term Debt, Fair Value	290,000	140,000
Long-term Debt, Fair Value	20,462	22,924
Junior subordinated debt securities	45,619	45,619
Fair Value Measurements [Member] | Interest Rate Swaps [Member]
ASSETS
Derivative financial assets	12,981	13,698
LIABILITIES
Derivative financial liabilities	12,953	13,647
Fair Value Measurements [Member] | Interest Rate Swaps [Member] | Level 2 [Member]
ASSETS
Derivative financial assets	12,981	13,698
LIABILITIES
Derivative financial liabilities	12,953	13,647
Fair Value Measurements [Member] | Interest Rate Lock Commitments [Member]
ASSETS
Derivative financial assets	235	85
Fair Value Measurements [Member] | Interest Rate Lock Commitments [Member] | Level 2 [Member]
ASSETS
Derivative financial assets	235	85
Fair Value Measurements [Member] | Forward Sale Contracts [Member]
ASSETS
Derivative financial assets		34
LIABILITIES
Derivative financial liabilities	57
Fair Value Measurements [Member] | Forward Sale Contracts [Member] | Level 2 [Member]
ASSETS
Derivative financial assets		34
LIABILITIES
Derivative financial liabilities	$ 57

XML

Deposits - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]
Aggregate value of certificate of deposit over $100,000	$ 382.2	$ 433.8

XML

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Total securities available-for-sale	$ 640,273	$ 509,425
US Treasury Securities [Member]
ASSETS
Total securities available-for-sale	14,880	0
Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	269,285	234,751
Collateralized Mortgage Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	118,006	63,774
Residential Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	46,668	48,669
Commercial Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	39,673	39,052
Obligations of States and Political Subdivisions [Member]
ASSETS
Total securities available-for-sale	142,702	114,264
Marketable Equity Securities [Member]
ASSETS
Total securities available-for-sale	9,059	8,915
Fair Value Measurements, Recurring [Member]
ASSETS
Total securities available-for-sale	640,273	509,425
Trading securities held in a Rabbi Trust	3,456	2,864
Total securities	643,729	512,289
Total Assets	656,945	526,106
LIABILITIES
Total Liabilities	13,010	13,647
Fair Value Measurements, Recurring [Member] | US Treasury Securities [Member]
ASSETS
Total securities available-for-sale	14,880
Fair Value Measurements, Recurring [Member] | Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	269,285	234,751
Fair Value Measurements, Recurring [Member] | Collateralized Mortgage Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	118,006	63,774
Fair Value Measurements, Recurring [Member] | Residential Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	46,668	48,669
Fair Value Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	39,673	39,052
Fair Value Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
ASSETS
Total securities available-for-sale	142,702	114,264
Fair Value Measurements, Recurring [Member] | Marketable Equity Securities [Member]
ASSETS
Total securities available-for-sale	9,059	8,915
Fair Value Measurements, Recurring [Member] | Interest Rate Swap [Member]
ASSETS
Derivative financial assets	12,981	13,698
LIABILITIES
Derivative financial liabilities	12,953	13,647
Fair Value Measurements, Recurring [Member] | Interest Rate Lock Commitments [Member]
ASSETS
Derivative financial assets	235	85
Fair Value Measurements, Recurring [Member] | Forward Sale Contracts [Member]
ASSETS
Derivative financial assets		34
LIABILITIES
Derivative financial liabilities	57
Level 1 [Member] | Fair Value Measurements, Recurring [Member]
ASSETS
Total securities available-for-sale	178	202
Trading securities held in a Rabbi Trust	3,456	2,864
Total securities	3,634	3,066
Total Assets	3,634	3,066
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | US Treasury Securities [Member]
ASSETS
Total securities available-for-sale	0
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	0	0
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | Collateralized Mortgage Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	0	0
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | Residential Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	0	0
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	0	0
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
ASSETS
Total securities available-for-sale	0	0
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | Marketable Equity Securities [Member]
ASSETS
Total securities available-for-sale	178	202
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | Interest Rate Swap [Member]
ASSETS
Derivative financial assets	0	0
LIABILITIES
Derivative financial liabilities	0	0
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | Interest Rate Lock Commitments [Member]
ASSETS
Derivative financial assets	0	0
Level 1 [Member] | Fair Value Measurements, Recurring [Member] | Forward Sale Contracts [Member]
ASSETS
Derivative financial assets		0
LIABILITIES
Derivative financial liabilities	0
Level 2 [Member] | Fair Value Measurements, Recurring [Member]
ASSETS
Total securities available-for-sale	640,095	509,223
Trading securities held in a Rabbi Trust	0	0
Total securities	640,095	509,223
Total Assets	653,311	523,040
LIABILITIES
Total Liabilities	13,010	13,647
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | US Treasury Securities [Member]
ASSETS
Total securities available-for-sale	14,880
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	269,285	234,751
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | Collateralized Mortgage Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	118,006	63,774
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | Residential Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	46,668	48,669
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	39,673	39,052
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
ASSETS
Total securities available-for-sale	142,702	114,264
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | Marketable Equity Securities [Member]
ASSETS
Total securities available-for-sale	8,881	8,713
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | Interest Rate Swap [Member]
ASSETS
Derivative financial assets	12,981	13,698
LIABILITIES
Derivative financial liabilities	12,953	13,647
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | Interest Rate Lock Commitments [Member]
ASSETS
Derivative financial assets	235	85
Level 2 [Member] | Fair Value Measurements, Recurring [Member] | Forward Sale Contracts [Member]
ASSETS
Derivative financial assets		34
LIABILITIES
Derivative financial liabilities	57
Level 3 [Member] | Fair Value Measurements, Recurring [Member]
ASSETS
Trading securities held in a Rabbi Trust	0	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | US Treasury Securities [Member]
ASSETS
Total securities available-for-sale	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	0	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | Collateralized Mortgage Obligations of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	0	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | Residential Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	0	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
ASSETS
Total securities available-for-sale	0	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
ASSETS
Total securities available-for-sale	0	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | Marketable Equity Securities [Member]
ASSETS
Total securities available-for-sale	0	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | Interest Rate Swap [Member]
ASSETS
Derivative financial assets	0	0
LIABILITIES
Derivative financial liabilities	0	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | Interest Rate Lock Commitments [Member]
ASSETS
Derivative financial assets	0	0
Level 3 [Member] | Fair Value Measurements, Recurring [Member] | Forward Sale Contracts [Member]
ASSETS
Derivative financial assets		$ 0

XML

Goodwill and Other Intangible Assets - Roll Forward of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Balance at beginning of year	$ 175,820	$ 175,733
Additions	0	87
Balance at End of Year	$ 175,820	$ 175,820

XML

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan - Summary of Non-Vested Restricted Stock (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Nonvested, Number of Shares (shares) [Roll Forward]
Granted	3,247	9,897
2003 Stock Plan [Member]
Nonvested, Number of Shares (shares) [Roll Forward]
Granted			259,673
2003 Stock Plan [Member] | Restricted Stock [Member]
Nonvested, Number of Shares (shares) [Roll Forward]
Beginning of period	115,019		79,415
Granted	22,189		0
Vested	45,864		41,740
Forfeited	11,929		14,530
End of period	79,415		23,145
Beginning of period	22.39		21.50
Granted	19.18		0.00
Vested	19.68		20.70
Forfeited	21.30		20.97
End of period	21.50		23.28
2014 Stock Plan [Member]
Nonvested, Number of Shares (shares) [Roll Forward]
Granted			80,455
2014 Stock Plan [Member] | Restricted Stock [Member]
Nonvested, Number of Shares (shares) [Roll Forward]
Beginning of period			0
Granted			80,455
Vested			158
Forfeited			473
End of period			79,824
Beginning of period			0.00
Granted			23.24
Vested			23.19
Forfeited			23.19
End of period			23.24

XML

Sale of Merchant Card Servicing Business

12 Months Ended

Dec. 31, 2014

Discontinued Operations and Disposal Groups [Abstract]

Sale of Merchant Card Servicing Business

SALE OF MERCHANT CARD SERVICING BUSINESS

We sold our existing merchant card servicing business for $4.8 million during the first quarter of 2013. Consequently, we terminated an agreement with our existing merchant processor and incurred a termination fee of $1.7 million. As a result of this transaction, we recognized a gain of $3.1 million in the first quarter of 2013. In conjunction with the sale of the merchant card servicing business, we entered into a marketing and sales alliance agreement with the purchaser for an initial term of ten years. The agreement provides that we will actively market and refer our customers to the purchaser and in return will receive a share of the future revenue. Future revenue is dependent on the number of referrals, number of new merchant accounts and volume of activity.

XML

Tax Effects on Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Tax Effects of Components of Other Comprehensive Income (Loss)

The following tables present the tax effects of the components of other comprehensive income (loss) for the years ended December 31:

(dollars in thousands)	Pre-Tax Amount			Tax (Expense) Benefit			Net of Tax Amount
2014
Net change in unrealized gains on securities available-for-sale	$	11,825		$	(4,139	)	$	7,686
Net available-for-sale securities gains reclassified into earnings	(41		)	15			(26		)
Adjustment to funded status of employee benefit plans	(13,394		)	4,595			(8,799		)
Other Comprehensive Income/(Loss)	$	(1,610	)	$	471		$	(1,139	)
2013
Net change in unrealized losses on securities available-for-sale	$	(16,928	)	$	5,925		$	(11,003	)
Net available-for-sale securities gains reclassified into earnings	(5		)	2			(3		)
Adjustment to funded status of employee benefit plans	18,299			(6,405		)	11,894
Other Comprehensive Income	$	1,366		$	(478	)	$	888
2012
Net change in unrealized gains on securities available-for-sale	$	4,097		$	(1,434	)	$	2,663
Net available-for-sale securities gains reclassified into earnings	(3,016		)	1,055			(1,961		)
Adjustment to funded status of employee benefit plans	(271		)	95			(176		)
Other Comprehensive Income	$	810		$	(284	)	$	526

XML

Deposits

12 Months Ended

Dec. 31, 2014

Banking and Thrift [Abstract]

Deposits

DEPOSITS

The following table presents the composition of deposits at December 31 and interest expense for the years ended December 31:

	2014				2013				2012
(dollars in thousands)	Balance		Interest Expense		Balance		Interest Expense		Balance		Interest Expense
Noninterest-bearing demand	$	1,083,919	$	—	$	992,779	$	—	$	960,980	$	—
Interest-bearing demand	335,099		19		312,790		75		316,760		146
Money market	376,612		572		281,403		446		361,233		528
Savings	1,027,095		1,607		994,805		1,735		965,571		2,356
Certificates of deposit	1,086,117		7,930		1,090,531		9,150		1,033,884		13,766
Total	$	3,908,842	$	10,128	$	3,672,308	$	11,406	$	3,638,428	$	16,796

The aggregate of all certificates of deposit over $100,000 amounted to $382.2 million and $433.8 million at December 31, 2014 and 2013.

The following table indicates the scheduled maturities of certificates of deposit at December 31, 2014:

(dollars in thousands)	Amount
2015	$	628,889
2016	143,728
2017	230,051
2018	45,139
2019	30,295
Thereafter	8,015
Total	$	1,086,117

XML

Income Taxes - Schedule of Statutory to Effective Tax Rate Reconciliation (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory tax rate	35.00%	35.00%	35.00%
Low income housing tax credits	(5.80%)	(6.80%)	(10.50%)
Tax-exempt interest	(4.60%)	(4.50%)	(6.70%)
Bank owned life insurance	(0.80%)	(1.00%)	(1.20%)
Other	(0.60%)	(0.40%)	0.90%
Effective Tax Rate	23.20%	22.30%	17.50%

XML

Tax Effects on Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Tax Effects on Other Comprehensive Income (Loss)

TAX EFFECTS ON OTHER COMPREHENSIVE INCOME (LOSS)

The following tables present the tax effects of the components of other comprehensive income (loss) for the years ended December 31:

(dollars in thousands)	Pre-Tax Amount			Tax (Expense) Benefit			Net of Tax Amount
2014
Net change in unrealized gains on securities available-for-sale	$	11,825		$	(4,139	)	$	7,686
Net available-for-sale securities gains reclassified into earnings	(41		)	15			(26		)
Adjustment to funded status of employee benefit plans	(13,394		)	4,595			(8,799		)
Other Comprehensive Income/(Loss)	$	(1,610	)	$	471		$	(1,139	)
2013
Net change in unrealized losses on securities available-for-sale	$	(16,928	)	$	5,925		$	(11,003	)
Net available-for-sale securities gains reclassified into earnings	(5		)	2			(3		)
Adjustment to funded status of employee benefit plans	18,299			(6,405		)	11,894
Other Comprehensive Income	$	1,366		$	(478	)	$	888
2012
Net change in unrealized gains on securities available-for-sale	$	4,097		$	(1,434	)	$	2,663
Net available-for-sale securities gains reclassified into earnings	(3,016		)	1,055			(1,961		)
Adjustment to funded status of employee benefit plans	(271		)	95			(176		)
Other Comprehensive Income	$	810		$	(284	)	$	526

XML

Goodwill and Other Intangible Assets - Summary of Expected Amortization Expense for Finite-Lived Intangibles Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
2015	$ 883
2016	645
2017	500
2018	134
2019	122
Total	$ 2,284

XML

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Letters of Credit

The following table sets forth our commitments and letters of credit as of the dates presented:

	December 31,
(dollars in thousands)	2014		2013
Commitments to extend credit	$	1,158,628	$	1,038,529
Standby letters of credit	73,584		78,639
Total	$	1,232,212	$	1,117,168

Future Estimated Payments Related to Data Processing and Communication Charges

The following table sets forth the future estimated payments related to data processing and communication charges for each of the five years following December 31, 2014:

(dollars in thousands)	Total
2015	$	11,326
2016	10,715
2017	11,057
2018	11,411
2019	11,777
Total	$	56,286

XML

Long-Term Borrowings and Subordinated Debt - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-term borrowings		$ 21,600,000	$ 19,300,000
Total loans pledged as collateral			2,300,000,000
Percentage of maximum borrowing capacity for any credit exposure			70.00%
Maximum eligible borrowing based on qualifying collateral			1,300,000,000.0
Maximum borrowing capacity			1,600,000,000.0
Capital lease			200,000
Percentage of equity owned			100.00%
Early repayment of junior subordinated debt	$ 45,000,000	$ 45,000,000

XML

Allowance for Loan Losses (Tables)

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Age Analysis of Past Due Loans Segregated by Class of Loans

The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented:

	December 31, 2014
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non- performing		Total Past Due Loans		Total Loans
Commercial real estate	$	1,674,930	$	2,548	$	323	$	4,435	$	7,306	$	1,682,236
Commercial and industrial	991,136		1,227		153		1,622		3,002		994,138
Commercial construction	214,174		—		—		1,974		1,974		216,148
Residential mortgage	485,465		565		1,220		2,336		4,121		489,586
Home equity	414,303		1,756		445		2,059		4,260		418,563
Installment and other consumer	65,111		352		73		31		456		65,567
Consumer construction	2,508		—		—		—		—		2,508
Total	$	3,847,627	$	6,448	$	2,214	$	12,457	$	21,119	$	3,868,746

	December 31, 2013
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non- performing		Total Past Due Loans		Total Loans
Commercial real estate	$	1,595,590	$	1,209	$	207	$	10,750	$	12,166	$	1,607,756
Commercial and industrial	836,276		2,599		278		3,296		6,173		842,449
Commercial construction	139,133		1,049		751		2,742		4,542		143,675
Residential mortgage	481,260		828		1,666		3,338		5,832		487,092
Home equity	408,777		2,468		659		2,291		5,418		414,195
Installment and other consumer	67,420		382		44		37		463		67,883
Consumer construction	3,149		—		—		—		—		3,149
Total	$	3,531,605	$	8,535	$	3,605	$	22,454	$	34,594	$	3,566,199

Recorded Investment in Commercial Loan Classes by Internally Assigned Risk Ratings

The following tables present the recorded investment in commercial loan classes by internally assigned risk ratings as of the dates presented:

	December 31, 2014
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	1,635,132	97.2	%	$	948,663	95.4	%	$	196,520	90.9	%	$	2,780,315	96.1	%
Special mention	23,597		1.4	%	30,357		3.1	%	12,014		5.6	%	65,968		2.3	%
Substandard	23,507		1.4	%	15,118		1.5	%	7,614		3.5	%	46,239		1.6	%
Total	$	1,682,236	100.0	%	$	994,138	100.0	%	$	216,148	100.0	%	$	2,892,522	100.0	%

	December 31, 2013
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	1,519,720	94.5	%	$	792,029	94.0	%	$	119,177	82.9	%	$	2,430,926	93.7	%
Special mention	57,073		3.6	%	34,085		4.1	%	15,621		10.9	%	106,779		4.1	%
Substandard	30,963		1.9	%	16,335		1.9	%	8,877		6.2	%	56,175		2.2	%
Total	$	1,607,756	100.0	%	$	842,449	100.0	%	$	143,675	100.0	%	$	2,593,880	100.0	%

Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status

The following tables present the recorded investment in consumer loan classes by performing and nonperforming status as of the dates presented:

	December 31, 2014
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	487,250	99.5	%	$	416,504	99.5	%	$	65,536	99.9	%	$	2,508	100.0	%	$	971,798	99.5	%
Nonperforming	2,336		0.5	%	2,059		0.5	%	31		0.1	%	—		—	%	4,426		0.5	%
Total	$	489,586	100.0	%	$	418,563	100.0	%	$	65,567	100.0	%	$	2,508	100.0	%	$	976,224	100.0	%

	December 31, 2013
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	483,754	99.3	%	$	411,904	99.4	%	$	67,846	99.9	%	$	3,149	100.0	%	$	966,653	99.4	%
Nonperforming	3,338		0.7	%	2,291		0.6	%	37		0.1	%	—		—	%	5,666		0.6	%
Total	$	487,092	100.0	%	$	414,195	100.0	%	$	67,883	100.0	%	$	3,149	100.0	%	$	972,319	100.0	%

Investments in Loans Considered to be Impaired and Related Information on Impaired Loans

The following table summarizes investments in loans considered to be impaired and related information on those impaired loans for the years presented:

	For the Year Ended
	December 31, 2014				December 31, 2013
(dollars in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	1,895	$	—
Commercial and industrial	—		—		—		—
Commercial construction	—		—		1,652		49
Consumer real estate	48		4		60		6
Other consumer	24		2		24		4
Total with a Related Allowance Recorded	72		6		3,631		59
Without a related allowance recorded:
Commercial real estate	20,504		684		29,314		929
Commercial and industrial	9,246		241		11,439		254
Commercial construction	8,145		227		14,112		326
Consumer real estate	7,027		396		8,714		436
Other consumer	56		2		114		6
Total without a Related Allowance Recorded	44,978		1,550		63,693		1,951
Total:
Commercial real estate	20,504		684		31,209		929
Commercial and industrial	9,246		241		11,439		254
Commercial construction	8,145		227		15,764		375
Consumer real estate	7,074		400		8,774		442
Other consumer	81		4		138		10
Total	$	45,050	$	1,556	$	67,324	$	2,010

The following table presents investments in loans considered to be impaired and related information on those impaired loans as of the dates presented:

	December 31, 2014						December 31, 2013
(dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—	$	—	$	—
Commercial and industrial	—		—		—		—		—		—
Commercial construction	—		—		—		681		1,383		25
Consumer real estate	43		43		43		53		53		53
Other consumer	20		20		11		33		33		19
Total with a Related Allowance Recorded	63		63		54		767		1,469		97
Without a related allowance recorded:
Commercial real estate	19,890		25,262		—		26,968		35,474		—
Commercial and industrial	9,218		9,449		—		9,580		9,703		—
Commercial construction	7,605		11,293		—		7,391		12,353		—
Consumer real estate	7,159		7,733		—		8,026		9,464		—
Other consumer	42		48		—		124		128		—
Total without a Related Allowance Recorded	43,914		53,785		—		52,089		67,122		—
Total:
Commercial real estate	19,890		25,262		—		26,968		35,474		—
Commercial and industrial	9,218		9,449		—		9,580		9,703		—
Commercial construction	7,605		11,293		—		8,072		13,736		25
Consumer real estate	7,202		7,776		43		8,079		9,517		53
Other consumer	62		68		11		157		161		19
Total	$	43,977	$	53,848	$	54	$	52,856	$	68,591	$	97

Summary of Allowance for Loan Losses

The following tables detail activity in the ALL for the periods presented:

	2014
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of year	$	18,921		$	14,433		$	5,374		$	6,362		$	1,165		$	46,255
Charge-offs	(2,041		)	(1,267		)	(712		)	(1,200		)	(1,133		)	(6,353		)
Recoveries	1,798			3,647			146			350			353			6,294
Net (Charge-offs)/ Recoveries	(243		)	2,380			(566		)	(850		)	(780		)	(59		)
Provision for loan losses	1,486			(3,145		)	1,285			821			1,268			1,715
Balance at End of Year	$	20,164		$	13,668		$	6,093		$	6,333		$	1,653		$	47,911

	2013
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of year	$	25,246		$	7,759		$	7,500		$	5,058		$	921		$	46,484
Charge-offs	(4,601		)	(2,714		)	(4,852		)	(2,407		)	(1,002		)	(15,576		)
Recoveries	3,388			2,142			531			651			324			7,036
Net (Charge-offs)/ Recoveries	(1,213		)	(572		)	(4,321		)	(1,756		)	(678		)	(8,540		)
Provision for loan losses	(5,112		)	7,246			2,195			3,060			922			8,311
Balance at End of Year	$	18,921		$	14,433		$	5,374		$	6,362		$	1,165		$	46,255

Summary of Allowance for Loan Losses and Recorded Investments

The following tables present the ALL and recorded investments in loans by category as of December 31:

	2014
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	20,164	$	20,164	$	19,890	$	1,662,346	$	1,682,236
Commercial and industrial	—		13,668		13,668		9,218		984,920		994,138
Commercial construction	—		6,093		6,093		7,605		208,543		216,148
Consumer real estate	43		6,290		6,333		7,202		903,455		910,657
Other consumer	11		1,642		1,653		62		65,505		65,567
Total	$	54	$	47,857	$	47,911	$	43,977	$	3,824,769	$	3,868,746

	2013
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	18,921	$	18,921	$	26,968	$	1,580,788	$	1,607,756
Commercial and industrial	—		14,433		14,433		9,580		832,869		842,449
Commercial construction	25		5,349		5,374		8,072		135,603		143,675
Consumer real estate	53		6,309		6,362		8,079		896,357		904,436
Other consumer	19		1,146		1,165		157		67,726		67,883
Total	$	97	$	46,158	$	46,255	$	52,856	$	3,513,343	$	3,566,199

XML

Long-Term Borrowings and Subordinated Debt - Schedule of Annual Maturities and Average Interest Rate of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]
2015, Balance	$ 2,399
2016, Balance	2,330
2017, Balance	2,412
2018, Balance	2,496
2019, Balance	2,514
Thereafter, Balance	7,291
Total Long-term debt	$ 19,442	$ 21,810	$ 34,101
2015 Average Rate	3.41%
2016 Average Rate	3.44%
2017 Average Rate	3.53%
2018 Average Rate	3.67%
2019 Average Rate	3.13%
Thereafter Average Rate	2.20%
Total Average Interest Rate	2.97%

XML

Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net Income	$ 57,910	$ 50,539	$ 34,200
Other Comprehensive Income (Loss), Before Tax:
Net change in unrealized gains (losses) on securities available-for-sale	11,825	(16,928)	4,097
Net available-for-sale securities gains reclassified into earnings	(41)	(5)	(3,016)
Adjustment to funded status of employee benefit plans	(13,394)	18,299	(271)
Other Comprehensive Income (Loss), Before Tax	(1,610)	1,366	810
Income tax benefit (expense) related to items of other comprehensive income	471	(478)	(284)
Other Comprehensive Income (Loss), After Tax	(1,139)	888	526
Comprehensive Income	$ 56,771	$ 51,427	$ 34,726

XML

Allowance for Loan Losses - Summary of Allowance for Loan Losses and Recorded Investments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 54	$ 97
Allowance for Loan Losses, Collectively Evaluated for Impairment	47,857	46,158
Total Allowance for Loan Losses	47,911	46,255	46,484
Portfolio Loans, Individually Evaluated for Impairment	43,977	52,856
Portfolio Loans, Collectively Evaluated for Impairment	3,824,769	3,513,343
Total Portfolio Loans	3,868,746	3,566,199
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	20,164	18,921
Total Allowance for Loan Losses	20,164	18,921	25,246
Portfolio Loans, Individually Evaluated for Impairment	19,890	26,968
Portfolio Loans, Collectively Evaluated for Impairment	1,662,346	1,580,788
Total Portfolio Loans	1,682,236	1,607,756
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0	0
Allowance for Loan Losses, Collectively Evaluated for Impairment	13,668	14,433
Total Allowance for Loan Losses	13,668	14,433	7,759
Portfolio Loans, Individually Evaluated for Impairment	9,218	9,580
Portfolio Loans, Collectively Evaluated for Impairment	984,920	832,869
Total Portfolio Loans	994,138	842,449
Commercial Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0	25
Allowance for Loan Losses, Collectively Evaluated for Impairment	6,093	5,349
Total Allowance for Loan Losses	6,093	5,374	7,500
Portfolio Loans, Individually Evaluated for Impairment	7,605	8,072
Portfolio Loans, Collectively Evaluated for Impairment	208,543	135,603
Total Portfolio Loans	216,148	143,675
Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	43	53
Allowance for Loan Losses, Collectively Evaluated for Impairment	6,290	6,309
Total Allowance for Loan Losses	6,333	6,362	5,058
Portfolio Loans, Individually Evaluated for Impairment	7,202	8,079
Portfolio Loans, Collectively Evaluated for Impairment	903,455	896,357
Total Portfolio Loans	910,657	904,436
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	11	19
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,642	1,146
Total Allowance for Loan Losses	1,653	1,165	921
Portfolio Loans, Individually Evaluated for Impairment	62	157
Portfolio Loans, Collectively Evaluated for Impairment	65,505	67,726
Total Portfolio Loans	$ 65,567	$ 67,883

XML

Earnings Per Share

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

The following table reconciles the numerators and denominators of basic and diluted EPS:

	Years ended December 31,
(dollars in thousands, except share and per share data)	2014		2013		2012
Numerator for Earnings per Common Share—Basic:
Net income	$	57,910	$	50,539	$	34,200
Less: Income allocated to participating shares	165		147		126
Net Income Allocated to Common Shareholders	$	57,745	$	50,392	$	34,074
Numerator for Earnings per Common Share—Diluted:
Net income	$	57,910	$	50,539	$	34,200
Denominators:
Weighted Average Common Shares Outstanding—Basic	29,683,103		29,647,231		28,976,619
Add: Dilutive potential common shares	25,621		35,322		32,261
Denominator for Treasury Stock Method—Diluted	29,708,724		29,682,553		29,008,880
Weighted Average Common Shares Outstanding—Basic	29,683,103		29,647,231		28,976,619
Add: Average participating shares outstanding	84,918		86,490		107,274
Denominator for Two-Class Method—Diluted	29,768,021		29,733,721		29,083,893
Earnings per common share—basic	$	1.95	$	1.70	$	1.18
Earnings per common share—diluted	$	1.95	$	1.70	$	1.18
Warrants considered anti-dilutive excluded from dilutive potential common shares - exercise price $31.53 per share, expires January 2019	517,012		517,012		517,012
Stock options considered anti-dilutive excluded from dilutive potential common shares	419,538		619,418		747,443
Restricted stock considered anti-dilutive excluded from dilutive potential common shares	59,297		51,169		75,012

XML

Selected Financial Data (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Summary of Selected Financial Data

The following table presents selected financial data for the most recent eight quarters.

	2014									2013
(dollars in thousands, except per share data) (unaudited)	Fourth Quarter		Third Quarter		Second Quarter			First Quarter		Fourth Quarter		Third Quarter		Second Quarter		First Quarter
SUMMARY OF OPERATIONS
Interest income	$	41,381	$	40,605	$	39,872		$	38,665	$	38,779	$	38,581	$	38,553	$	37,843
Interest expense	3,315		3,076		3,017			3,074		3,125		3,307		3,957		4,174
Provision for loan losses	1,106		1,454		(1,134		)	289		1,562		3,419		1,023		2,307
Net interest income after provision for loan losses	36,960		36,075		37,989			35,302		34,092		31,855		33,573		31,362
Security gains, net	—		—		40			1		—		3		—		2
Noninterest income	11,220		11,931		11,731			11,415		11,312		12,539		12,867		14,804
Noninterest expense	29,720		28,440		30,165			28,914		29,447		27,943		28,386		31,616
Income before taxes	18,460		19,566		19,595			17,804		15,957		16,454		18,054		14,552
Provision for income taxes	3,963		4,906		4,875			3,771		4,098		4,207		3,951		2,222
Net Income Available to Common Shareholders	$	14,497	$	14,660	$	14,720		$	14,033	$	11,859	$	12,247	$	14,103	$	12,330
Per Share Data
Common earnings per share—diluted	$	0.49	$	0.49	$	0.49		$	0.47	$	0.40	$	0.41	$	0.47	$	0.41
Dividends declared per common share	0.18		0.17		0.17			0.16		0.16		0.15		0.15		0.15
Common book value	20.42		20.33		20.04			19.64		19.21		18.68		18.39		18.32

XML

Allowance for Loan Losses - Age Analysis of Past Due Loans Segregated by Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	$ 3,847,627	$ 3,531,605
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	6,448	8,535
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	2,214	3,605
Financing Receivable, Recorded Investment, Non-performing	12,457	22,454
Financing Receivable, Recorded Investment, Past Due Loans, Total	21,119	34,594
Total Portfolio Loans	3,868,746	3,566,199
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	1,674,930	1,595,590
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	2,548	1,209
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	323	207
Financing Receivable, Recorded Investment, Non-performing	4,435	10,750
Financing Receivable, Recorded Investment, Past Due Loans, Total	7,306	12,166
Total Portfolio Loans	1,682,236	1,607,756
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	991,136	836,276
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	1,227	2,599
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	153	278
Financing Receivable, Recorded Investment, Non-performing	1,622	3,296
Financing Receivable, Recorded Investment, Past Due Loans, Total	3,002	6,173
Total Portfolio Loans	994,138	842,449
Commercial Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	214,174	139,133
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0	1,049
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	751
Financing Receivable, Recorded Investment, Non-performing	1,974	2,742
Financing Receivable, Recorded Investment, Past Due Loans, Total	1,974	4,542
Total Portfolio Loans	216,148	143,675
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	485,465	481,260
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	565	828
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	1,220	1,666
Financing Receivable, Recorded Investment, Non-performing	2,336	3,338
Financing Receivable, Recorded Investment, Past Due Loans, Total	4,121	5,832
Total Portfolio Loans	489,586	487,092
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	414,303	408,777
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	1,756	2,468
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	445	659
Financing Receivable, Recorded Investment, Non-performing	2,059	2,291
Financing Receivable, Recorded Investment, Past Due Loans, Total	4,260	5,418
Total Portfolio Loans	418,563	414,195
Installment and Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	65,111	67,420
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	352	382
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	73	44
Financing Receivable, Recorded Investment, Non-performing	31	37
Financing Receivable, Recorded Investment, Past Due Loans, Total	456	463
Total Portfolio Loans	65,567	67,883
Consumer Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	2,508	3,149
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due	0	0
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, Non-performing	0	0
Financing Receivable, Recorded Investment, Past Due Loans, Total	0	0
Total Portfolio Loans	$ 2,508	$ 3,149

XML

Long-Term Borrowings and Subordinated Debt - Schedule of Long-Term Borrowings, Interest Expense and Weighted Average Interest Rate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]
Long-term borrowings	$ 19,442	$ 21,810	$ 34,101
Weighted average interest rate	3.00%	3.01%	3.17%
Interest expense	$ 617	$ 746	$ 1,107

XML

Securities Available-for-Sale - Composition of Securities Available-for-Sale (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 629,463	$ 510,399
Gross Unrealized Gains	12,647	6,802
Gross Unrealized Losses	(1,837)	(7,776)
Fair Value	640,273	509,425
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14,873	0
Gross Unrealized Gains	7	0
Gross Unrealized Losses	0	0
Fair Value	14,880	0
Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	268,029	235,181
Gross Unrealized Gains	2,334	2,151
Gross Unrealized Losses	(1,078)	(2,581)
Fair Value	269,285	234,751
Collateralized Mortgage Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	116,897	63,776
Gross Unrealized Gains	1,257	601
Gross Unrealized Losses	(148)	(603)
Fair Value	118,006	63,774
Residential Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	45,274	47,934
Gross Unrealized Gains	1,548	1,420
Gross Unrealized Losses	(154)	(685)
Fair Value	46,668	48,669
Commercial Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	39,834	40,357
Gross Unrealized Gains	232	0
Gross Unrealized Losses	(393)	(1,305)
Fair Value	39,673	39,052
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	136,977	115,572
Gross Unrealized Gains	5,789	1,294
Gross Unrealized Losses	(64)	(2,602)
Fair Value	142,702	114,264
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	621,884	502,820
Gross Unrealized Gains	11,167	5,466
Gross Unrealized Losses	(1,837)	(7,776)
Fair Value	631,214	500,510
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,579	7,579
Gross Unrealized Gains	1,480	1,336
Gross Unrealized Losses	0	0
Fair Value	$ 9,059	$ 8,915

XML

Employee Benefits

12 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Employee Benefits

EMPLOYEE BENEFITS

We maintain a defined benefit pension plan, or Plan, covering substantially all employees hired prior to January 1, 2008. The benefits are based on years of service and the employee’s compensation for the highest five consecutive years in the last 10 years. Contributions are intended to provide for benefits attributed to employee service to date and for those benefits expected to be earned in the future.

The following table summarizes the activity in the benefit obligation and Plan assets deriving the funded status, which is recorded in other liabilities in the Consolidated Balance Sheets:

(dollars in thousands)	2014			2013
Change in Projected Benefit Obligation
Projected benefit obligation at beginning of year	$	95,969		$	102,454
Service cost	2,369			2,767
Interest cost	4,470			3,985
Actuarial loss (gain)	16,020			(7,167		)
Benefits paid	(5,704		)	(6,070		)
Projected Benefit Obligation at End of Year	$	113,124		$	95,969
Change in Plan Assets
Fair value of plan assets at beginning of year	$	89,556		$	81,088
Actual return on plan assets	9,634			14,538
Benefits paid	(5,704		)	(6,070		)
Fair Value of Plan Assets at End of Year	$	93,486		$	89,556
Funded Status	$	(19,638	)	$	(6,413	)

The following table sets forth the amounts recognized in accumulated other comprehensive income (loss) at December 31:

(dollars in thousands)	2014			2013
Prior service credit	$	(1,167	)	$	(1,304	)
Net actuarial loss	30,726			18,373
Total (Before Tax Effects)	$	29,559		$	17,069

Below are the actuarial weighted average assumptions used in determining the benefit obligation:

	2014		2013
Discount rate	4.00	%	4.75	%
Rate of compensation increase	3.00	%	3.00	%

The following table summarizes the components of net periodic pension cost and other changes in Plan assets and benefit obligation recognized in other comprehensive income (loss) for the years ended December 31:

(dollars in thousands)	2014			2013			2012
Components of Net Periodic Pension Cost
Service cost—benefits earned during the period	$	2,369		$	2,767		$	2,788
Interest cost on projected benefit obligation	4,470			3,985			4,358
Expected return on plan assets	(6,907		)	(6,207		)	(5,564		)
Amortization of prior service cost (credit)	(137		)	(138		)	(137		)
Recognized net actuarial loss	941			2,425			2,474
Net Periodic Pension Expense	$	736		$	2,832		$	3,919
Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss)
Net actuarial loss (gain)	$	13,294		$	(15,499	)	$	2,477
Recognized net actuarial loss	(941		)	(2,425		)	(2,474		)
Recognized prior service credit	137			138			137
Total (Before Tax Effects)	$	12,490		$	(17,786	)	$	140
Total Recognized in Net Benefit Cost and Other Comprehensive Income (Loss) (Before Tax Effects)	$	13,226		$	(14,954	)	$	4,059

The following table summarizes the actuarial weighted average assumptions used in determining net periodic pension cost:

	2014		2013		2012
Discount rate	4.75	%	4.00	%	4.75	%
Rate of compensation increase	3.00	%	3.00	%	4.00	%
Expected return on assets	8.00	%	8.00	%	8.00	%

The net actuarial loss included in accumulated other comprehensive income (loss) expected to be recognized in net periodic pension cost during the year ended December 31, 2015 is $1.9 million. The prior service credit expected to be recognized during the same period is $0.1 million.

The accumulated benefit obligation for the Plan was $104.3 million at December 31, 2014 and $88.3 million at December 31, 2013.

We consider many factors when setting the assumed rate of return on Plan assets. As a general guideline the assumed rate of return is equal to the weighted average of the expected returns for each asset category and is estimated based on historical returns as well as expected future returns. The weighted average discount rate is derived from corporate yield curves.

S&T Bank’s Retirement Plan Committee determines the investment policy for the Plan. In general, the targeted asset allocation is 50 percent to 70 percent equities and 30 percent to 50 percent fixed income. A strategic allocation within each asset class is employed based on the Plan’s time horizon, risk tolerances, performance expectations and asset class preferences. Investment managers have discretion to invest in any equity or fixed-income asset class, subject to the securities guidelines of the Plan’s Investment Policy Statement.

At this time, S&T Bank is not required to make a cash contribution to the Plan in 2015. No contributions were made during 2014.

The following table provides information regarding estimated future benefit payments to be paid in each of the next five years and in the aggregate for the five years thereafter:

(dollars in thousands)	Amount
2015	$	6,440
2016	6,437
2017	6,268
2018	6,719
2019	6,637
2020 - 2024	38,984

We also have supplemental executive retirement plans, or SERPs, for certain key employees. The SERPs are unfunded. The projected benefit obligations related to the SERPs were $3.5 million and $2.8 million at December 31, 2014 and 2013. These amounts also represent the net amount recognized in the statement of financial position for the SERPs. Net periodic benefit costs for the SERPs were $0.4 million, $0.4 million and $0.5 million for each of the years ended December 31, 2014, 2013 and 2012. Additionally, $2.1 million and $1.5 million before tax were reflected in accumulated other comprehensive income (loss) at December 31, 2014 and 2013, in relation to the SERPs. The actuarial assumptions used for the SERPs are the same as those used for the Plan.

We maintain a Thrift Plan, a qualified defined contribution plan, in which substantially all employees are eligible to participate. We make matching contributions to the Thrift Plan up to 3.5 percent of participants’ eligible compensation and may make additional profit-sharing contributions as provided by the Thrift Plan. Expense related to these contributions amounted to $1.3 million in 2014, $1.4 million in 2013 and $1.3 million in 2012.

Fair Value Measurements

The following tables present our Plan assets measured at fair value on a recurring basis by fair value hierarchy level at December 31, 2014 and 2013. There were no transfers between Level 1 and Level 2 for items of a recurring basis during the periods presented. There were no purchases or transfers of Level 3 plan assets in 2014.

	December 31, 2014
	Fair Value Asset Classes(1)
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents(2)	$	—	$	5,073	$	—	$	5,073
Fixed Income(3)	26,726		—		—		26,726
Equities:
Equity index mutual funds—international(4)	3,728		—		—		3,728
Domestic Individual Equities(5)	57,085		—		—		57,085
International Individual Equities(6)	874		—		—		874
Total Assets at Fair Value	$	88,413	$	5,073	$	—	$	93,486

(1) Refer to Note 1 Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy.

(2) This asset class includes FDIC insured money market instruments.

(3) This asset class includes a variety of fixed income mutual funds which primarily invests in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar.

(4) The sole investment within this asset class is the Harbor International Institutional fund.

(5) This asset class includes individual domestic equities invested in an active all-cap strategy. It may also include convertible bonds.

(6) This asset class includes American Depository Receipts, or ADR.

	December 31, 2013
	Fair Value Asset Classes(1)
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents(2)	$	—	$	2,946	$	—	$	2,946
Fixed Income(3)	26,448		—		—		26,448
Equities:
Equity index mutual funds—domestic(4)	1,558		—		—		1,558
Equity index mutual funds—international(5)	2,497		—		—		2,497
Domestic Individual Equities(6)	55,206		—		—		55,206
International Individual Equities(7)	901		—		—		901
Total Assets at Fair Value	$	86,610	$	2,946	$	—	$	89,556

(1) Refer to Note 1 Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy.

(2) This asset class includes FDIC insured money market instruments.

(3) This asset class includes a variety of fixed income mutual funds which primarily invests in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar.

(4) The sole investment within this asset class is S&P 600 index iShares.

(5) The sole investment within this asset class is MSCI EAFE Index iShares.

(6) This asset class includes individual domestic equities invested in an active all-cap strategy. It may also include convertible bonds.

(7) This asset class includes American Depository Receipts, or ADR.

XML

Income Taxes - Schedule of Reconciliation of Change in Federal and State Gross Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 1,902	$ 978	$ 200
Increase	55	924	0
Decrease	(1,673)	0	0
Current period tax positions	0	0	913
Reductions for statute of limitations expirations	0	0	(135)
Balance at End of Year	284	1,902	978
Amount That Would Affect the Effective Tax Rate if Recognized	$ 184	$ 148	$ 147

XML

Parent Company Condensed Financial Information - Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Financial Information [Line Items]
Cash	$ 109,580	$ 108,356	$ 337,711	$ 270,526
Other assets	97,024	103,026
Total Assets	4,964,686	4,533,190
Other liabilities	61,789	48,300
Total Liabilities	4,356,297	3,961,884
Total Shareholders' Equity	608,389	571,306	537,422	490,526
Total Liabilities and Shareholders' Equity	4,964,686	4,533,190
Parent Company [Member]
Condensed Financial Information [Line Items]
Cash	38,028	14,852	12,202	13,684
Bank subsidiary	565,927	553,825
Nonbank subsidiaries	20,569	19,561
Other assets	5,567	4,441
Total Assets	630,091	592,679
Long-term debt	20,619	20,619
Other liabilities	1,083	754
Total Liabilities	21,702	21,373
Total Shareholders' Equity	608,389	571,306
Total Liabilities and Shareholders' Equity	$ 630,091	$ 592,679

XML

Employee Benefits - Pension Plan Assets Measured at Fair Value on Recurring Basis (Detail) (Fair Value Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	$ 93,486	$ 89,556
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	5,073	2,946
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	26,726	26,448
Equity Index Mutual Funds-Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value		1,558
Equity Index Mutual Funds-International [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	3,728	2,497
Domestic Individual Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	57,085	55,206
International Individual Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	874	901
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	88,413	86,610
Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	0	0
Level 1 [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	26,726	26,448
Level 1 [Member] | Equity Index Mutual Funds-Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value		1,558
Level 1 [Member] | Equity Index Mutual Funds-International [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	3,728	2,497
Level 1 [Member] | Domestic Individual Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	57,085	55,206
Level 1 [Member] | International Individual Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	874	901
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	5,073	2,946
Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	5,073	2,946
Level 2 [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	0	0
Level 2 [Member] | Equity Index Mutual Funds-Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value		0
Level 2 [Member] | Equity Index Mutual Funds-International [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	0	0
Level 2 [Member] | Domestic Individual Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	0	0
Level 2 [Member] | International Individual Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	0	0
Level 3 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	0	0
Level 3 [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	0	0
Level 3 [Member] | Equity Index Mutual Funds-Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value		0
Level 3 [Member] | Equity Index Mutual Funds-International [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	0	0
Level 3 [Member] | Domestic Individual Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	0	0
Level 3 [Member] | International Individual Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets measured at fair value	$ 0	$ 0

XML

Securities Available-for-Sale - Amortized Cost and Fair Value of Available-for-Sale Securities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 629,463	$ 510,399
Fair Value	640,273	509,425
Obligations of U.S. Government Corporations and Agencies, and Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized Cost	21,137
Due after one year through five years, Amortized Cost	196,589
Due after five years through ten years, Amortized Cost	101,013
Due after ten years, Amortized Cost	101,140
Available-for-sale Securities, Debt Maturities, Amortized Cost	419,879
Due in one year or less, Fair Value	21,339
Due after one year through five years, Fair Value	197,183
Due after five years through ten years, Fair Value	102,788
Due after ten years, Fair Value	105,557
Fair Value, Debt securities	426,867
Collateralized Mortgage Obligations of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	116,897	63,776
Fair Value	118,006	63,774
Residential Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	45,274	47,934
Fair Value	46,668	48,669
Commercial Mortgage-Backed Securities of U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	39,834	40,357
Fair Value	39,673	39,052
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	621,884	502,820
Fair Value	631,214	500,510
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,579	7,579
Fair Value	$ 9,059	$ 8,915

XML

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The following tables present our assets and liabilities that are measured at fair value on a recurring basis by fair value hierarchy level at December 31, 2014 and 2013. There were no transfers between Level 1 and Level 2 for items measured at fair value on a recurring basis during the periods presented.

	December 31, 2014
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Securities available-for-sale:
U.S. Treasury securities	$	—	$	14,880	$	—	$	14,880
Obligations of U.S. government corporations and agencies	—		269,285		—		269,285
Collateralized mortgage obligations of U.S. government corporations and agencies	—		118,006		—		118,006
Residential mortgage-backed securities of U.S. government corporations and agencies	—		46,668		—		46,668
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		39,673		—		39,673
Obligations of states and political subdivisions	—		142,702		—		142,702
Marketable equity securities	178		8,881		—		9,059
Total securities available-for-sale	178		640,095		—		640,273
Trading securities held in a Rabbi Trust	3,456		—		—		3,456
Total securities	3,634		640,095		—		643,729
Derivative financial assets:
Interest rate swaps	—		12,981		—		12,981
Interest rate lock commitments	—		235		—		235
Total Assets	$	3,634	$	653,311	$	—	$	656,945
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	$	—	$	12,953	$	—	$	12,953
Forward sale contracts	—		57		—		57
Total Liabilities	$	—	$	13,010	$	—	$	13,010

	December 31, 2013
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Securities available-for-sale:
Obligations of U.S. government corporations and agencies	$	—	$	234,751	$	—	$	234,751
Collateralized mortgage obligations of U.S. government corporations and agencies	—		63,774		—		63,774
Residential mortgage-backed securities of U.S. government corporations and agencies	—		48,669		—		48,669
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		39,052		—		39,052
Obligations of states and political subdivisions	—		114,264		—		114,264
Marketable equity securities	202		8,713		—		8,915
Total securities available-for-sale	202		509,223		—		509,425
Trading securities held in a Rabbi Trust	2,864		—		—		2,864
Total securities	3,066		509,223		—		512,289
Derivative financial assets:
Interest rate swaps	—		13,698		—		13,698
Interest rate lock commitments	—		85		—		85
Forward sales contracts	—		34		—		34
Total Assets	$	3,066	$	523,040	$	—	$	526,106
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	—		13,647		—		13,647
Total Liabilities	$	—	$	13,647	$	—	$	13,647

Changes in Assets Classified as Level 3 in Fair Value Hierarchy

The following table presents the changes in assets measured at fair value on a recurring basis for which we have utilized Level 3 inputs to determine the fair value:

	Years ended December 31,
(dollars in thousands)	2014		2013
Balance at beginning of year	$	—	$	300
Total gains included in other comprehensive income (loss)(1)	—		44
Net purchases, sales, issuances and settlements	—		—
Transfers out of Level 3	—		(344		)
Balance at End of Year	$	—	$	—

(1) Changes in estimated fair value of available-for-sale investments are recorded in accumulated other comprehensive income (loss) while gains and losses from sales are recorded in security gains (losses), net in the Consolidated Statements of Net Income.

Assets Measured at Fair Value on Nonrecurring Basis by Fair Value Hierarchy

The following table presents our assets that are measured at fair value on a nonrecurring basis by the fair value hierarchy level as of the dates presented:

	December 31, 2014								December 31, 2013
(dollars in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
ASSETS(1)
Loans held for sale	$	—	$	—	$	—	$	—	$	—	$	—	$	1,516	$	1,516
Impaired loans	—		—		12,916		12,916		—		—		19,197		19,197
Other real estate owned	—		—		117		117		—		—		317		317
Mortgage servicing rights	—		—		2,934		2,934		—		—		1,025		1,025
Total Assets	$	—	$	—	$	15,967	$	15,967	$	—	$	—	$	22,055	$	22,055

(1) This table presents only the nonrecurring items that are recorded at fair value in our financial statements.

Carrying Values and Fair Values of Financial Instruments

The carrying values and fair values of our financial instruments at December 31, 2014 and 2013 are presented in the following tables:

			Fair Value Measurements at December 31, 2014
(dollars in thousands)	Carrying Value(1)		Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	109,580	$	109,580	$	109,580	$	—	$	—
Securities available-for-sale	640,273		640,273		178		640,095		—
Loans held for sale	2,970		2,991		—		—		2,991
Portfolio loans, net of unearned income	3,868,746		3,827,634		—		—		3,827,634
Bank owned life insurance	62,252		62,252		—		62,252		—
FHLB and other restricted stock	15,135		15,135		—		—		15,135
Trading securities held in a Rabbi Trust	3,456		3,456		3,456		—		—
Mortgage servicing rights	2,817		2,934		—		—		2,934
Interest rate swaps	12,981		12,981		—		12,981		—
Interest rate lock commitments	235		235		—		235		—
LIABILITIES
Deposits	$	3,908,842	$	3,910,342	$	—	$	—	$	3,910,342
Securities sold under repurchase agreements	30,605		30,605		—		—		30,605
Short-term borrowings	290,000		290,000		—		—		290,000
Long-term borrowings	19,442		20,462		—		—		20,462
Junior subordinated debt securities	45,619		45,619		—		—		45,619
Interest rate swaps	12,953		12,953		—		12,953		—
Forward sale contracts	57		57				57

(1) As reported in the Consolidated Balance Sheets

			Fair Value Measurements at December 31, 2013
(dollars in thousands)	Carrying Value(1)		Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	108,356	$	108,356	$	108,356	$	—	$	—
Securities available-for-sale	509,425		509,425		202		509,223		—
Loans held for sale	2,136		2,139		—		—		2,139
Portfolio loans, net of unearned income	3,566,199		3,538,072		—		—		3,538,072
Bank owned life insurance	60,480		60,480		—		60,480		—
FHLB and other restricted stock	13,629		13,629		—		—		13,629
Trading securities held in a Rabbi Trust	2,864		2,864		2,864		—		—
Mortgage servicing rights	2,919		3,143		—		—		3,143
Interest rate swaps	13,698		13,698		—		13,698		—
Interest rate lock commitments	85		85		—		85		—
Forward sale contracts	34		34		—		34		—
LIABILITIES
Deposits	$	3,672,308	$	3,673,624	$	—	$	—	$	3,673,624
Securities sold under repurchase agreements	33,847		33,847		—		—		33,847
Short-term borrowings	140,000		140,000		—		—		140,000
Long-term borrowings	21,810		22,924		—		—		22,924
Junior subordinated debt securities	45,619		45,619		—		—		45,619
Interest rate swaps	13,647		13,647		—		13,647		—

(1) As reported in the Consolidated Balance Sheets

XML

Mortgage Servicing Rights

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Mortgage Servicing Rights

MORTGAGE SERVICING RIGHTS

For the years ended December 31, 2014, 2013 and 2012, the 1-4 family mortgage loans that were sold to Fannie Mae amounted to $40.1 million, $62.9 million and $82.9 million. At December 31, 2014, 2013 and 2012 our servicing portfolio totaled $325.8 million, $327.4 million and $329.2 million.

The following table indicates MSRs and the net carrying values:

(dollars in thousands)	Servicing Rights			Valuation Allowance			Net Carrying Value
Balance at December 31, 2012	$	3,206		$	(1,100	)	$	2,106
Additions	780			—			780
Amortization	(778		)	—			(778		)
Temporary impairment recapture	—			811			811
Balance at December 31, 2013	$	3,208		$	(289	)	$	2,919
Additions	431			—			431
Amortization	(531		)	—			(531		)
Temporary impairment	—			(2		)	(2		)
Balance at December 31, 2014	$	3,108		$	(291	)	$	2,817

XML

Deposits - Composition of Deposits and Interest Expenses (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Deposits And Borrowings Maturities [Line Items]
Balance	$ 3,908,842	$ 3,672,308	$ 3,638,428
Interest Expense	10,128	11,406	16,796
Noninterest-bearing Demand [Member]
Schedule Of Deposits And Borrowings Maturities [Line Items]
Balance	1,083,919	992,779	960,980
Interest-bearing Demand [Member]
Schedule Of Deposits And Borrowings Maturities [Line Items]
Balance	335,099	312,790	316,760
Interest Expense	19	75	146
Money Market [Member]
Schedule Of Deposits And Borrowings Maturities [Line Items]
Balance	376,612	281,403	361,233
Interest Expense	572	446	528
Savings [Member]
Schedule Of Deposits And Borrowings Maturities [Line Items]
Balance	1,027,095	994,805	965,571
Interest Expense	1,607	1,735	2,356
Certificates of Deposit [Member]
Schedule Of Deposits And Borrowings Maturities [Line Items]
Balance	1,086,117	1,090,531	1,033,884
Interest Expense	$ 7,930	$ 9,150	$ 13,766