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, 2012

Commission file number 0-7674

First Financial Bankshares, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Texas	75-0944023
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
400 Pine Street, Abilene, Texas	79601
(Address of Principal Executive Offices)	(Zip Code)
Registrant’s telephone number, including area code: (325) 627-7155

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

Title of Class	Name of Exchange on Which Registered
Common Stock, par value $0.01 per share	Nasdaq Global Select Market

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

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  x    No  ¨

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  ¨    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  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K 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.  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ¨    No  x

As of June 30, 2012, the last business day of the registrant’s most recently completed second fiscal quarter, the aggregate market value of the registrant’s voting and non-voting common stock held by non-affiliates was $1.03 billion.

As of February 22, 2013, there were 31,502,907 shares of common stock outstanding.

Documents Incorporated by Reference

Certain information called for by Part III is incorporated by reference to the proxy statement for our 2013 annual meeting of shareholders, which will be filed with the Securities and Exchange Commission not later than 120 days after December 31, 2012.

TABLE OF CONTENTS

			Page
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS				1
PART I
	ITEM 1.	Business		2
	ITEM 1A.	Risk Factors		16
	ITEM 1B.	Unresolved Staff Comments		24
	ITEM 2.	Properties		24
	ITEM 3.	Legal Proceedings		24
	ITEM 4.	Mine Safety Disclosures		24
PART II
	ITEM 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities		25
	ITEM 6.	Selected Financial Data		27
	ITEM 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		28
	ITEM 7A.	Quantitative and Qualitative Disclosures About Market Risk		44
	ITEM 8.	Financial Statements and Supplementary Data		44
	ITEM 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure		45
	ITEM 9A.	Controls and Procedures		45
	ITEM 9B.	Other Information		47
PART III
	ITEM 10.	Directors, Executive Officers and Corporate Governance		48
	ITEM 11.	Executive Compensation		48
	ITEM 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters		48
	ITEM 13.	Certain Relationships and Related Transactions, and Director Independence		48
	ITEM 14.	Principal Accounting Fees and Services		48
PART IV
	ITEM 15.	Exhibits, Financial Statement Schedules		49
SIGNATURES				50
EXHIBITS INDEX				52

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CAUTIONARY STATEMENT REGARDING

FORWARD-LOOKING STATEMENTS

This Form 10-K contains certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. When used in this Form 10-K, words such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “predict,” “project,” and similar expressions, as they relate to us or our management, identify forward-looking statements. These forward-looking statements are based on information currently available to our management. Actual results could differ materially from those contemplated by the forward-looking statements as a result of certain factors, including but not limited, to those listed in “Item 1A-Risk Factors” and the following:

• general economic conditions, including our local, state and national real estate markets and employment trends;

• volatility and disruption in national and international financial markets;

• government intervention in the U. S. financial system including the effects of recent legislative, tax, accounting and regulatory actions and reforms, including the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”), the Jumpstart Our Business Startups Act, the Consumer Financial Protection Bureau and the capital ratios of proposed rule making pursuant to Basel III;

• political instability;

• the ability of the Federal government to deal with the slowdown of the national economy and the fiscal cliff;

• competition from other financial institutions and financial holding companies;

• the effects of and changes in trade, monetary and fiscal policies and laws, including interest rate policies of the Board of Governors of the Federal Reserve System;

• changes in the demand for loans;

• fluctuations in the value of collateral securing our loan portfolio and in the level of the allowance for loan losses;

• the accuracy of our estimates of future loan losses;

• the accuracy of our estimates and assumptions regarding the performance of our securities portfolio;

• soundness of other financial institutions with which we have transactions;

• inflation, interest rate, market and monetary fluctuations;

• changes in consumer spending, borrowing and savings habits;

• our ability to attract deposits;

• changes in our liquidity position;

• changes in the reliability of our vendors, internal control system or information systems;

• our ability to attract and retain qualified employees;

• acquisitions and integration of acquired businesses;

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• the possible impairment of goodwill associated with our acquisitions;

• consequences of continued bank mergers and acquisitions in our market area, resulting in fewer but much larger and stronger competitors;

• expansion of our operations, including branch openings, new product offerings and expansion into new markets;

• changes in our compensation and benefit plans; and

• acts of God or of war or terrorism.

Such statements reflect the current views of our management with respect to future events and are subject to these and other risks, uncertainties and assumptions relating to our operations, results of operations, growth strategy and liquidity. All subsequent written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by this paragraph. We undertake no obligation to publicly update or otherwise revise any forward-looking statements, whether as a result of new information, future events or otherwise.

PART I

ITEM 1. BUSINESS

General

First Financial Bankshares, Inc., a Texas corporation (“the Company”), is a financial holding company registered under the Bank Holding Company Act of 1956, as amended, or BHCA. As such, we are supervised by the Board of Governors of the Federal Reserve System, or Federal Reserve Board, as well as several other banking regulators. We were formed as a bank holding company in 1956 under the original name F & M Operating Company, but our banking operations date back to 1890, when Farmers and Merchants National Bank opened for business in Abilene, Texas. Through December 30, 2012, we owned eleven banks, a trust company, a technology operating company, and an insurance agency, all organized and located in Texas. Effective December 30, 2012, we consolidated our eleven bank charters into our Abilene bank charter to reduce certain operating costs and make more efficient our technology and compliance operations. As of December 31, 2012, our subsidiaries are:

• First Financial Bank, National Association, Abilene, Texas;

• First Technology Services, Inc., Abilene, Texas;

• First Financial Trust & Asset Management Company, National Association, Abilene, Texas; and

• First Financial Insurance Agency, Inc., Abilene, Texas.

Through our subsidiaries, we conduct full-service commercial banking business. Our banking centers are located primarily in Central, North Central and West Texas. As of December 31, 2012, we had 55 financial centers across Texas, with eleven locations in Abilene, two locations in Cleburne, two locations in Stephenville, two locations in Granbury, two locations in San Angelo, three locations in Weatherford, and one location each in Mineral Wells, Hereford, Sweetwater, Eastland, Ranger, Rising Star, Cisco, Southlake, Aledo, Willow Park, Brock, Alvarado, Burleson, Crowley, Waxahachie, Grapevine, Keller, Trophy Club, Boyd, Bridgeport, Decatur, Roby, Trent, Merkel, Clyde, Moran, Albany, Midlothian, Glen Rose, Acton, Odessa, Fort Worth and Huntsville, all in Texas.

Even though we operate in a growing number of Texas markets, we continue to believe that decisions are best made at the local level. Although we consolidated our eleven bank charters into one charter effective December 30, 2012, we continue to operate as eleven bank regions with local advisory boards of directors, local bank region presidents and local decision-making. We have consolidated many of the backroom operations, such as investment securities, accounting, check processing, technology and employee benefits, which improves our efficiency and frees management of our bank regions to concentrate on serving the banking needs of their local communities. We call this our “one bank, eleven regions” concept.

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In the past, we have chosen to keep our Company focused on the State of Texas, one of the nation’s largest, fastest-growing and most economically diverse states. With approximately 25.7 million residents, Texas has more people than any other state except California. The population of Texas grew 23.1% from 2000-2011 according to the U.S. Census Bureau. Many of the communities in which we operate are growing faster than the statewide average, as shown below:

Population Growth 2000-2011*

Bridgeport and Wise County	22.6	%
Fort Worth and Tarrant County	27.9	%
Cleburne, Midlothian and Johnson County	20.5	%
Granbury and Hood County	25.7	%

Weatherford, Willow Park, Aledo and Parker County	33.7	%
Stephenville and Erath County	15.9	%

* Source: U. S. Census Bureau

These economies include dynamic centers of higher education, agriculture, energy and natural resources, retail, military, healthcare, tourism, retirement living, manufacturing and distribution.

We have also largely foregone the larger metropolitan areas of Texas. We believe our community approach to doing business works best for us in small and mid-size markets, where we can play a prominent role in the economic, civic and cultural life of the community. Our goal is to serve these communities well and to experience growth as these markets continue to expand. In many instances, banking competition is less intense in smaller markets, making it easier for us to operate rationally and attract and retain high-caliber employees who prefer not only our community-banker concept but the high quality of life in smaller cities.

Over the years, we have grown in three ways: by growing internally, by opening new branch locations and by acquisition of other banks. Since 1997, we have completed eleven bank acquisitions increasing total assets from $1.57 billion to $4.50 billion. We have also established a trust and asset management company and a technology services company, both of which operate as subsidiaries of First Financial Bankshares, Inc. Looking ahead, we intend to continue to grow locally by better serving the needs of our customers and putting them first in all of our decisions. We continually look for new branch locations, so we can provide more convenient service to our customers, and we are actively pursuing acquisition opportunities by calling on banks that we would like to acquire.

When targeting a bank for acquisition, the bank generally needs to be in the type of community that fits our profile, is well managed and profitable. We like growing communities with good amenities – schools, infrastructure, commerce and lifestyle. We prefer non-metropolitan markets, either around Dallas/Fort Worth, Houston, San Antonio or Austin or along the Interstate 35, 45 and 20 corridors in Texas. We might also consider the acquisition of banks in East Texas or the Texas Hill Country area. Banks in the $100 million to up to $1.0 billion asset size fit our “sweet spot” for acquisition, but we will consider banks that are larger or smaller, or that are in other areas of Texas if we believe they would be a good fit for our existing Company.

We also own First Financial Investments, Inc. (which is dormant). During 2011, we merged First Financial Bankshares of Delaware, Inc. and First Financial Investments of Delaware, Inc. into First Financial Bankshares, Inc.

Information on our revenues, profits and losses and total assets appears in the discussion of our Results of Operations contained in Item 7 hereof.

First Financial Bankshares, Inc.

We provide management and technical resources and policy direction to our subsidiaries, which enable them to improve or expand their banking services while continuing their local activity and identity. Each of our subsidiaries operates under the day-to-day management of its own board of directors and officers, including advisory boards of directors for our bank regions. We provide resources and policy direction in, among other things, the following areas:

• asset and liability management;

• investments;

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• accounting;

• budgeting;

• training;

• marketing;

• planning;

• risk management;

• loan review;

• human resources;

• insurance;

• capitalization;

• regulatory compliance; and

• internal audit.

In particular, we assist our subsidiaries with, among other things, decisions concerning major capital expenditures, employee fringe benefits, including retirement plans and group medical, dividend policies, and appointment of officers and directors, including advisory directors, and their compensation. We also perform, through corporate staff groups or by outsourcing to third parties, internal audits, compliance oversight and loan reviews of our subsidiaries. We provide advice and specialized services for our bank regions related to lending, investing, purchasing, advertising, public relations, and computer services.

We evaluate various potential financial institution acquisition opportunities and approve potential locations for new branch offices. We anticipate that funding for any acquisitions or expansions would be provided from our existing cash balances, available dividends from our subsidiaries, utilization of available lines of credit and future debt or equity offerings.

Services Offered by Our Subsidiaries

Our subsidiary bank is a separate legal entity that operates under the day-to-day management of its board of directors and officers. Our eleven bank regions operating under this subsidiary bank each have separate advisory boards that make recommendations and provide assistance to bank regional management in the operations of their respective region. Each of our bank regions provides general commercial banking services, which include accepting and holding checking, savings and time deposits, making loans, automated teller machines, drive-in and night deposit services, safe deposit facilities, remote deposit capture, internet banking, mobile banking, payroll cards, transmitting funds, and performing other customary commercial banking services. We also conduct full service trust activities through First Financial Trust & Asset Management Company, National Association. Through our trust company, we offer personal trust services, which include the administration of estates, testamentary trusts, revocable and irrevocable trusts and agency accounts. We also administer all types of retirement and employee benefit accounts, which include 401(k) profit sharing plans and IRAs. In addition, we provide securities brokerage services through arrangements with an unrelated third party in our Abilene, San Angelo and Weatherford bank regions.

Competition

Commercial banking in Texas is highly competitive, and because we hold less than 1% of the state’s deposits, we represent only a minor segment of the industry. To succeed in this industry, we believe that we must have the capability to compete effectively in the areas of (1) interest rates paid or charged; (2) scope of services offered; and (3) prices charged for such services. Our bank regions compete in their respective service areas against highly competitive banks, thrifts, savings and loan associations, small loan companies, credit unions, mortgage companies, insurance companies, and brokerage firms, all of which are engaged in providing financial products and services and some of which are larger than us in terms of capital, resources and personnel.

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Our business does not depend on any single customer or any few customers, and the loss of any one would not have a materially adverse effect upon our business. Although we have a broad base of customers that are not related to us, our customers also occasionally include our officers and directors, as well as other entities with which we are affiliated. Through our bank regions we may make loans to our officers and directors, and entities with which we are affiliated, in the ordinary course of business. We make these loans on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other persons. Loans to our directors, officers and their affiliates are also subject to numerous restrictions under federal and state banking laws, which we describe in greater detail below.

Employees

Including all of our subsidiaries, we employed approximately 1,000 full-time equivalent employees at December 31, 2012. Our management believes that our employee relations have been and will continue to be good.

Supervision and Regulation

Both federal and state laws extensively regulate bank holding companies, financial holding companies and banks. These laws (and the regulations promulgated thereunder) are primarily intended to protect depositors and the deposit insurance fund of the FDIC. The following information describes particular laws and regulatory provisions relating to financial holding companies and banks. This discussion is qualified in its entirety by reference to the particular laws and regulatory provisions. A change in any of these laws or regulations may have a material effect on our business and the business of our subsidiaries.

Bank Holding Companies and Financial Holding Companies

Historically, the activities of bank holding companies were limited to the business of banking and activities closely related or incidental to banking. Bank holding companies were generally prohibited from acquiring control of any company that was not a bank and from engaging in any business other than the business of banking or managing and controlling banks. The Gramm-Leach-Bliley Act, which took effect on March 12, 2000, dismantled many Depression-era restrictions against affiliation between banking, securities and insurance firms by permitting bank holding companies to engage in a broader range of financial activities, so long as certain safeguards are observed. Specifically, bank holding companies may elect to become “financial holding companies” that may affiliate with securities firms and insurance companies and engage in other activities that are financial in nature or incidental to a financial activity. Thus, with the enactment of the Gramm-Leach-Bliley Act, banks, security firms and insurance companies find it easier to acquire or affiliate with each other and cross-sell financial products. The Gramm-Leach-Bliley Act permits a single financial services organization to offer a more complete array of financial products and services than historically was permitted.

A financial holding company is essentially a bank holding company with significantly expanded powers. Under the Gramm-Leach-Bliley Act, in addition to traditional lending activities, the following activities are among those that are deemed “financial in nature” for financial holding companies: securities underwriting, dealing in or making a market in securities, sponsoring mutual funds and investment companies, insurance underwriting and agency activities, activities which the Federal Reserve Board determines to be closely related to banking, and certain merchant banking activities.

We elected to become a financial holding company in September 2001. As a financial holding company, we have very broad discretion to affiliate with securities firms and insurance companies, make merchant banking investments, and engage in other activities that the Federal Reserve Board has deemed financial in nature. In order to continue as a financial holding company, we must continue to be well-capitalized, well-managed and maintain compliance with the Community Reinvestment Act. Depending on the types of financial activities that we may elect to engage in, under the Gramm-Leach-Bliley Act’s functional regulation principles, we may become subject to supervision by additional government agencies. The election to be treated as a financial holding company increases our ability to offer financial products and services that historically we were either unable to provide or were only able to provide on a limited basis. As a result, we will face increased competition in the markets for any new financial products and services that we may offer. Likewise, an increased amount of consolidation among banks and securities firms or banks and insurance firms could result in a growing number of large financial institutions that could compete aggressively with us.

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Mergers and Acquisitions

We generally must obtain approval from the banking regulators before we can acquire other financial institutions. We may not engage in certain acquisitions if we are undercapitalized. Furthermore, the BHCA provides that the Federal Reserve Board cannot approve any acquisition, merger or consolidation that may substantially lessen competition in the banking industry, create a monopoly in any section of the country, or be a restraint of trade. However, the Federal Reserve Board may approve such a transaction if the convenience and needs of the community clearly outweigh any anti-competitive effects. Specifically, the Federal Reserve Board would consider, among other factors, the expected benefits to the public (greater convenience, increased competition, greater efficiency, etc.) against the risks of possible adverse effects (undue concentration of resources, decreased or unfair competition, conflicts of interest, unsound banking practices, etc.).

Under the BHCA, the Company must obtain the prior approval of the Federal Reserve Board, or acting under delegated authority, the Federal Reserve Bank of Dallas before (1) acquiring direct or indirect ownership or control of any class of voting securities of any bank or bank holding company if, after the acquisition, the Company would directly or indirectly own or control 5% or more of the class; (2) acquiring all of substantially all of the assets of another bank or bank holding company; or (3) merging or consolidating with another bank holding company.

The Change in Bank Control Act of 1978, as amended, or the CIBCA, and the related regulations of the Federal Reserve Board require any person or groups of persons acting in concert (except for companies required to make application under the BHCA), to file a written notice with the Federal Reserve Board before the person or group acquires control of the Company. The CIBCA defines “control” as the direct or indirect power to vote 25% or more of any class of voting securities or to direct the management or policies of a bank holding company or an insured bank. A rebuttable presumption of control arises under the CIBCA where a person or group controls 10% or more, but less than 25%, of a class of the voting stock of a company or insured bank which is a reporting company under the Securities Exchange Act of 1934, as amended, such as the Company, or such ownership interest is greater than the ownership interest held by any other person or group.

Banks

Federal and state laws and regulations that govern banks have the effect of, among other things, regulating the scope of business, investments, cash reserves, the purpose and nature of loans, the maximum interest rate chargeable on loans, the amount of dividends declared, and required capitalization ratios.

National Banking Associations. Banks organized as national banking associations under the National Bank Act are subject to regulation and examination by the Office of the Comptroller of the Currency, or OCC. Effective December 30, 2012, we consolidated our eleven bank charters into one, that being our Abilene charter. As a result, the OCC now supervises, regulates and regularly examines the following subsidiaries:

• First Financial Bank, National Association, Abilene, Texas;

• First Financial Trust & Asset Management Company, National Association; and

• First Technology Services, Inc.

The OCC’s supervision and regulation of banks is primarily intended to protect the interests of depositors. The National Bank Act:

• requires each national banking association to maintain reserves against deposits,

• restricts the nature and amount of loans that may be made and the interest that may be charged, and

• restricts investments and other activities.

State Banks. Banks that are organized as state banks under Texas law are subject to regulation and examination by the Texas Department of Banking (the “Banking Department”). Prior to December 30, 2012, the Banking

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Department regulated, supervised and regularly examined our two subsidiary state banks, First Financial Bank, Hereford and First Financial Bank, Huntsville. The Banking Department’s supervision and regulation of banks is primarily designed to protect the interests of depositors. Texas law:

• restricts the nature and amount of loans that may be made and the interest that may be charged, and

• restricts investments and other activities.

State banks are also subject to regulation by either the FDIC or the Federal Reserve Board. First Financial Bank, Hereford and First Financial Bank, Huntsville were non-member banks of the Federal Reserve, and as such their federal regulator was the FDIC and were subject to most of the federal laws described below.

Deposit Insurance

Our subsidiary bank is a member of the FDIC. The FDIC provides deposit insurance protection that covers all deposit accounts in FDIC-insured depository institutions. Until October 2008, the protection generally did not exceed $100,000 per depositor. Beginning in October 2008, the amount of protection was increased to $250,000 under the Temporary Liquidity Guarantee Program (TLGP) of the Emergency Economic Stabilization Act of 2008. This increased protection to $250,000 was initially available only through December 31, 2009 but the Dodd-Frank Act made this $250,000 protection permanent. The new regulations were also expanded whereby the protection for non interest bearing deposits was unlimited at institutions participating in the TLGP. This unlimited coverage for these non interest bearing accounts was also initially only available through December 31, 2009 but was extended by the Dodd-Frank Act until December 31, 2012. Non interest bearing deposits initially also included, by definition, certain Interest on Lawyers Trust Accounts (IOLTA) and Negotiable Order of Withdrawal accounts (NOW Accounts) with a maximum capped interest rate. Effective January 1, 2011 through December 31, 2012, the definition of non interest bearing was changed to no longer include NOW accounts. The unlimited coverage for interest bearing accounts was not renewed and expired on December 31, 2012.

Our subsidiary bank must pay assessments to the FDIC under a risk-based assessment system for this federal deposit insurance protection. FDIC-insured depository institutions that are members of the Bank Insurance Fund pay insurance premiums at rates based on their risk classification. Institutions assigned to higher risk classifications (i.e., institutions that pose a greater risk of loss to the deposit insurance fund) pay assessments at higher rates than institutions assigned to lower risk classifications. An institution’s risk classification is assigned based on its capital levels and the level of supervisory concern the institution poses to bank regulators. In addition, the FDIC can impose shortages in special assessments to cover the Deposit Insurance Fund (DIF). As of December 31, 2012, the assessment rate for our subsidiary bank was at the lowest level risk-based premium available which was 5.00% of the assessment base per annum. During 2012 and prior to December 30, 2012 when we consolidated our bank charters, three of our bank subsidiaries paid higher than the 5.00% premium, the highest being 6.11% at First Financial Bank, Hereford. The assessment base was broadened by the Dodd-Frank Act to be defined as average consolidated total assets less average tangible equity. The FDIC also announced in 2009 the requirement of insured depositor institutions to prepay on December 30, 2009, their estimated quarterly assessments for 2010, 2011 and 2012, including a three basis point increase in premium rates for 2011 and 2012. The Company’s prepayment amount totaled $11.6 million in the aggregate and was expensed based on quarterly assessment calculations.

In October 2010, the FDIC adopted a new Restoration Plan for the DIF to ensure that the fund reserve ratio reaches 1.35% by September 30, 2020, as required by the Dodd-Frank Act. The Dodd-Frank Act also eliminated the requirement that the FDIC pay dividends to insured depository institutions when the reserve ratio exceeds certain thresholds. Under the Restoration Plan, the FDIC did not institute the uniform three-basis point increase in assessment rates scheduled to take place on January 1, 2011 and maintained the current schedule of assessment rates for all depository institutions. At least semi-annually, the FDIC will update its loss and income projections for the DIF and, if needed, will increase or decrease assessment rates, following notice-and-comment rulemaking, if required. The Dodd-Frank Act requires the FDIC to offset the effect of increasing the reserve ratio on institutions with total consolidated assets of less than $10 billion.

As required by the Dodd-Frank Act, the FDIC also revised the deposit insurance assessment system, effective April 1, 2011, to base assessments on the average total consolidated assets of insured depository institutions during the assessment period, less the average tangible equity of the institution during the assessment period as opposed to

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solely bank deposits at an institution. This base assessment change necessitated that the FDIC adjust the assessment rates to ensure that the revenue collected under the new assessment system, will approximately equal that under the existing assessment system.

Under the Financial Institutions Reform, Recovery, and Enforcement Act of 1989, or FIRREA, an FDIC-insured depository institution can be held liable for any losses incurred by the FDIC in connection with (1) the “default” of one of its FDIC-insured subsidiaries or (2) any assistance provided by the FDIC to one of its FDIC-receivers, and “in danger of default” is defined generally as the existence of certain conditions indicating that a default is likely to occur in the absence of regulatory assistance.

The Federal Deposit Insurance Act, or FDIA, requires that the FDIC review (1) any merger or consolidation by or with an insured bank, or (2) any establishment of branches by an insured bank. The FDIC is also empowered to regulate interest rates paid by insured banks. Approval of the FDIC is also required before an insured bank retires any part of its common or preferred stock, or any capital notes or debentures.

Payment of Dividends

We are a legal entity separate and distinct from our banking and other subsidiaries. We receive most of our revenue from dividends paid to us by our bank and trust company subsidiaries. Described below are some of the laws and regulations that apply when either we or our subsidiaries pay or paid dividends.

National banks are required by federal law to obtain the prior approval of the OCC to declare and pay dividends if the total of all dividends declared in any calendar year would exceed the total of (1) such bank’s net profits (as defined and interpreted by regulation) for that year plus (2) its retained net profits (as defined and interpreted by regulation) for the preceding two calendar years, less any required transfers to surplus. In addition, these banks may only pay dividends to the extent that retained net profits (including the portion transferred to surplus) exceed bad debts (as defined by regulation). Prior to December 30, 2012, First Financial Bank, Hereford and First Financial Bank, Huntsville, as Texas state banking associations, could not pay a dividend reducing its capital and surplus without the prior approval of the Banking Department. In additional, the FDIC had the right to prohibit the payment of dividends by a state, non-member bank where the payment was deemed to be an unsafe or unsound banking practice.

Our subsidiaries paid aggregate dividends of approximately $58.4 million in 2012 and approximately $47.4 million in 2011. Under the dividend restrictions discussed above, as of December 31, 2012, our subsidiaries could have declared in the aggregate additional dividends of approximately $60.0 million from retained net profits, without obtaining regulatory approvals.

To pay dividends, we and our subsidiaries must maintain adequate capital above regulatory guidelines. In addition, if the applicable regulatory authority believes that a bank under its jurisdiction is engaged in, or is about to engage in, an unsafe or unsound practice (which, depending on the financial condition of the bank, could include the payment of dividends), the regulatory authorities may require, after notice and hearing, that such bank cease and desist from the unsafe practice. The FDIC and the OCC have each indicated paying dividends that deplete a bank’s capital base to an inadequate level would be an unsafe and unsound banking practice. The Federal Reserve Board, the OCC and the FDIC have issued policy statements that recommend that bank holding companies and insured banks should generally only pay dividends to the extent net income is sufficient to cover both cash dividends and a rate of earnings retention consistent with capital needs, asset quality and overall financial condition. No undercapitalized institution may pay a dividend.

Affiliate Transactions

The Federal Reserve Act, the FDIA and the rules adopted under these statutes restrict the extent to which we can borrow or otherwise obtain credit from, or engage in certain other transactions with, our subsidiaries. These laws regulate “covered transactions” between insured depository institutions and their subsidiaries, on the one hand, and their nondepository affiliates, on the other hand. The Dodd-Frank Act expanded the definition of affiliate to make any investment fund, including a mutual fund, for which a depository institution or its affiliates serve as investment advisor an affiliate of the depository institution. “Covered transactions” include a loan or extension of

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credit to a nondepository affiliate, a purchase of securities issued by such an affiliate, a purchase of assets from such an affiliate (unless otherwise exempted by the Federal Reserve Board), an acceptance of securities issued by such an affiliate as collateral for a loan, and an issuance of a guarantee, acceptance, or letter of credit for the benefit of such an affiliate. The Dodd-Frank Act extended the limitations to derivative transactions, repurchase agreements and securities lending and borrowing transactions that create credit exposure to an affiliate or an insider. The “covered transactions” that an insured depository institution and its subsidiaries are permitted to engage in with their nondepository affiliates are limited to the following amounts: (1) in the case of any one such affiliate, the aggregate amount of “covered transactions” cannot exceed ten percent of the capital stock and the surplus of the insured depository institution; and (2) in the case of all affiliates, the aggregate amount of “covered transactions” cannot exceed twenty percent of the capital stock and surplus of the insured depository institution. In addition, extensions of credit that constitute “covered transactions” must be collateralized in prescribed amounts. Further, a bank holding company and its subsidiaries are prohibited from engaging in certain tie-in arrangements in connection with any extension of credit, lease or sale of property or furnishing of services. Finally, when we and our subsidiaries conduct transactions internally among us, we are required to do so at arm’s length.

Loans to Directors, Executive Officers and Principal Shareholders

The authority of our subsidiary bank to extend credit to our directors, executive officers and principal shareholders, including their immediate family members and corporations and other entities that they control, is subject to substantial restrictions and requirements under Sections 22(g) and 22(h) of the Federal Reserve Act and Regulation O promulgated thereunder, as well as the Sarbanes-Oxley Act of 2002. These statutes and regulations impose specific limits on the amount of loans our subsidiary bank may make to directors and other insiders, and specified approval procedures must be followed in making loans that exceed certain amounts. In addition, all loans our subsidiary bank make to directors and other insiders must satisfy the following requirements:

• the loans must be made on substantially the same terms, including interest rates and collateral, as prevailing at the time for comparable transactions with persons not affiliated with us or the subsidiary bank;

• the subsidiary bank must follow credit underwriting procedures at least as stringent as those applicable to comparable transactions with persons who are not affiliated with us or the subsidiary bank; and

• the loans must not involve a greater than normal risk of non-payment or include other features not favorable to the bank.

Furthermore, our subsidiary bank must periodically report all loans made to directors and other insiders to the bank regulators, and these loans are closely scrutinized by the regulators for compliance with Sections 22(g) and 22(h) of the Federal Reserve Act and Regulation O. Each loan to directors or other insiders must be pre-approved by the bank’s board of directors with the interested director abstaining from voting.

Capital

Bank Holding Companies and Financial Holding Companies. The Federal Reserve Board has adopted risk-based capital guidelines for bank holding companies and financial holding companies. The ratio of total capital to risk weighted assets (including certain off-balance-sheet activities, such as standby letters of credit) must be a minimum of eight percent. At least half of the total capital is to be composed of common shareholders’ equity, minority interests in the equity accounts of consolidated subsidiaries and a limited amount of perpetual preferred stock, less goodwill, which is collectively referred to as Tier 1 Capital. The remainder of total capital may consist of subordinated debt, other preferred stock and a limited amount of loan loss reserves.

In addition, the Federal Reserve Board has established minimum leverage ratio guidelines for bank holding companies and financial holding companies. Bank holding companies and financial holding companies that meet certain specified criteria, including having the highest regulatory rating, must maintain a minimum Tier 1 Capital leverage ratio (Tier 1 Capital to average assets for the current quarter, less goodwill) of three percent. Bank holding companies and financial holding companies that do not have the highest regulatory rating will generally be required to maintain a higher Tier 1 Capital leverage ratio of three percent plus an additional cushion of 100 to 200 basis points. The guidelines also provide that bank holding companies and financial holding companies experiencing

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internal growth or making acquisitions will be expected to maintain strong capital positions. Such strong capital positions must be kept substantially above the minimum supervisory levels without significant reliance on intangible assets (e.g., goodwill and core deposit intangibles). As of December 31, 2012, our capital ratios were as follows: (1) Tier 1 Capital to Risk-Weighted Assets Ratio, 17.43%; (2) Total Capital to Risk-Weighted Assets Ratio, 18.68%; and (3) Tier 1 Capital Leverage Ratio, 10.60%.

The Dodd-Frank Act requires the Federal Reserve Board to apply consolidated capital requirements to bank holding companies and financial holding companies that are no less stringent than those currently applied to depository institutions. Under these standards, trust preferred securities will be excluded from Tier 1 capital unless such securities were issued prior to May 19, 2010 by a bank holding company with less than $15 billion in assets. The Dodd-Frank Act additionally requires capital requirements to be countercyclical so that the required amount of capital increases in times of economic expansion and decreases in times of economic contraction, consistent with safety and soundness.

Banks. The Federal Deposit Insurance Corporation Improvement Act of 1991, or FDICIA, established five capital tiers with respect to depository institutions: “well-capitalized,” “adequately capitalized,” “undercapitalized,” “significantly undercapitalized,” and “critically undercapitalized.” A depository institution’s capital tier will depend upon where its capital levels are in relation to various relevant capital measures, including (1) risk-based capital measures, (2) a leverage ratio capital measure and (3) certain other factors. Regulations establishing the specific capital tiers provide that a “well-capitalized” institution will have a total risk-based capital ratio of ten percent or greater, a Tier 1 risk-based capital ratio of six percent or greater, and a Tier 1 leverage ratio of five percent or greater, and not be subject to any written regulatory enforcement agreement, order, capital directive or prompt corrective action derivative. For an institution to be “adequately capitalized,” it will have a total risk-based capital ratio of eight percent or greater, a Tier 1 risk-based capital ratio of four percent or greater, and a Tier 1 leverage ratio of four percent or greater (in some cases three percent). For an institution to be “undercapitalized,” it will have a total risk-based capital ratio that is less than eight percent, a Tier 1 risk-based capital ratio less than four percent or a Tier 1 leverage ratio less than four percent (or a leverage ratio less than three percent if the institution’s composite rating is 1 in its most recent report of examination, subject to appropriate federal banking agency guidelines). For an institution to be “significantly undercapitalized,” it will have a total risk-based capital ratio less than six percent, a Tier 1 risk-based capital ratio less than three percent, or a Tier 1 leverage ratio less than three percent. For an institution to be “critically undercapitalized,” it will have a ratio of tangible equity to total assets equal to or less than two percent. FDICIA requires federal banking agencies to take “prompt corrective action” against depository institutions that do not meet minimum capital requirements. The various regulatory agencies, including the OCC, have adopted substantially similar regulations that define the five categories identified by FDICIA, using the total risk based capital, Tier 1 risk based capital and Tier 1 leverage ratios as relevant capital measures. Under current regulations, our subsidiary bank was “well capitalized” as of December 31, 2012.

The Dodd-Frank Act requires the FDIC to establish minimum leverage and risk-based capital requirements to apply to insured depository institutions. The Dodd-Frank Act additionally requires capital requirements to be countercyclical so that the required amount of capital increases in times of economic expansion and decreases in times of economic contraction, consistent with safety and soundness.

FDICIA generally prohibits a depository institution from making any capital distribution (including payment of a dividend) or paying any management fee to its holding company if the depository institution would thereafter be “undercapitalized.” An “undercapitalized” institution must develop a capital restoration plan and its parent holding company must guarantee that institution’s compliance with such plan. The liability of the parent holding company under any such guarantee is limited to the lesser of five percent of the institution’s assets at the time it became “undercapitalized” or the amount needed to bring the institution into compliance with all capital standards. Furthermore, in the event of the bankruptcy of the parent holding company, such guarantee would take priority over the parent’s general unsecured creditors. If a depository institution fails to submit an acceptable capital restoration plan, it shall be treated as if it is “significantly undercapitalized.” “Significantly undercapitalized” depository institutions may be subject to a number of requirements and restrictions, including orders to sell sufficient voting stock to become “adequately capitalized,” requirements to reduce total assets, and cessation of receipt of deposits from correspondent banks. “Critically undercapitalized” institutions are subject to the appointment of a receiver or conservator. Finally, FDICIA requires the various regulatory agencies to set forth certain standards that do not relate to capital. Such standards relate to the safety and soundness of operations and management and to asset quality and executive compensation, and permit regulatory action against a financial institution that does not meet such standards.

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If an insured bank fails to meet its capital guidelines, it may be subject to a variety of other enforcement remedies, including a prohibition on the taking of brokered deposits and the termination of deposit insurance by the FDIC. Bank regulators continue to indicate their desire to raise capital requirements beyond their current levels.

In addition to FDICIA capital standards, Texas-chartered banks must also comply with the capital requirements imposed by the Banking Department. Neither the Texas Finance Code nor its regulations specify any minimum capital-to-assets ratio that must be maintained by a Texas-chartered bank. Instead, the Banking Department determines the appropriate ratio on a bank by bank basis, considering factors such as the nature of a bank’s business, its total revenue, and the bank’s total assets. Prior to December 30, 2012, our two Texas-chartered banks exceeded the minimum ratios applied to them.

Our Support of Our Subsidiaries

Under Federal Reserve Board policy, we are expected to commit resources to act as a source of strength to support each of our subsidiaries. This support may be required at times when, absent such Federal Reserve Board policy, we would not otherwise be required to provide it. This policy was codified by the Dodd-Frank Act. In addition, any loans we make to our subsidiaries would be subordinate in right of payment to deposits and to other indebtedness of our subsidiaries. In the event of a bank holding company’s bankruptcy, any commitment by the bank holding company to a federal bank regulatory agency to maintain the capital of a subsidiary bank will be assumed by the bankruptcy trustee and be subject to a priority of payment.

Under the National Bank Act, if the capital stock of a national bank is impaired by losses or otherwise, the OCC is authorized to require the bank’s shareholders to pay the deficiency on a pro-rata basis. If any shareholder refuses to pay the pro-rata assessment after three months notice, then the bank’s board of directors must sell an appropriate amount of the shareholder’s stock at a public auction to make up the deficiency. To the extent necessary, if a deficiency in capital still exists and the bank refuses to go into liquidation, then a receiver may be appointed to wind down the bank’s affairs. Additionally, under the Federal Deposit Insurance Act, in the event of a loss suffered or anticipated by the FDIC (either as a result of the default of a banking subsidiary or related to FDIC assistance provided to a subsidiary in danger of default) our other subsidiaries may be assessed for the FDIC’s loss.

Interstate Banking and Branching

Effective June 1, 1997, the Riegle-Neal Interstate Banking and Branching Efficiency Act of 1994 amended the Federal Deposit Insurance Act and certain other statutes to permit state and national banks with different home states to merge across state lines, with approval of the appropriate federal banking agency, unless the home state of a participating bank had passed legislation prior to May 31, 1997 expressly prohibiting interstate mergers. Under the Riegle-Neal Act amendments, once a state or national bank has established branches in a state, that bank may establish and acquire additional branches at any location in the state at which any bank involved in the interstate merger transaction could have established or acquired branches under applicable federal or state law. If a state opts out of interstate branching within the specified time period, no bank in any other state may establish a branch in the state which has opted out, whether through an acquisition or de novo.

However, under the Dodd-Frank Act, the national branching requirements have been relaxed and national banks and state banks are able to establish branches in any state if that state would permit the establishment of the branch by a state bank chartered in that state.

Both the OCC and Banking Department accept applications for interstate merger and branching transactions, subject to certain limitations on ages of the banks to be acquired and the total amount of deposits within the state a bank or financial holding company may control. Since our primary service area is Texas, we do not expect that the ability to operate in other states will have any material impact on our growth strategy. We may, however, face increased competition from out-of-state banks that branch or make acquisitions in our primary markets in Texas.

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Community Reinvestment Act of 1977

The Community Reinvestment Act of 1977, or CRA, subjects a bank to regulatory assessment to determine if the institution meets the credit needs of its entire community, including low- and moderate-income neighborhoods served by the bank, and to take that determination into account in its evaluation of any application made by such bank for, among other things, approval of the acquisition or establishment of a branch or other deposit facility, an office relocation, a merger, or the acquisition of shares of capital stock of another financial institution. The regulatory authority prepares a written evaluation of an institution’s record of meeting the credit needs of its entire community and assigns a rating. These ratings are “Outstanding,” “Satisfactory,” “Needs Improvement” and “Substantial Non-Compliance.” Institutions with ratings lower than “Satisfactory” may be restricted from engaging in the aforementioned activities. Prior to our consolidation of our bank charters and effective as of December 30, 2012, we believe our subsidiary banks had taken significant actions to comply with the CRA, and each has received ratings ranging from “satisfactory” to “outstanding” in its most recent review by federal regulators with respect to its compliance with the CRA.

Monitoring and Reporting Suspicious Activity

Under the Bank Secrecy Act, IRS rules and other regulations, we are required to monitor and report unusual or suspicious account activity as well as transactions involving the transfer or withdrawal of amounts in excess of prescribed limits. Under the USA PATRIOT Act, financial institutions are subject to prohibitions against specified financial transactions and account relationships as well as enhanced due diligence and “know your customer” standards in their dealings with financial institutions and foreign customers. For example, the enhanced due diligence policies, procedures and controls generally require financial institutions to take reasonable steps:

• to conduct enhanced scrutiny of account relationships to guard against money laundering and report any suspicious transaction;

• to ascertain the identity of the nominal and beneficial owners of, and the source of funds deposited into, each account as needed to guard against money laundering and report any suspicious transactions;

• to ascertain for any foreign bank, the shares of which are not publicly traded, the identity of the owners of the foreign bank, and the nature and extent of the ownership interest of each such owner; and

• to ascertain whether any foreign bank provides correspondent accounts to other foreign banks and, if so, the identity of those foreign banks and related due diligence information.

Under the USA PATRIOT Act, financial institutions are also required to establish anti-money laundering programs. The USA PATRIOT Act sets forth minimum standards for these programs, including:

• the development of internal policies, procedures, and controls;

• the designation of a compliance officer;

• an ongoing employee training program; and

• an independent audit function to test the programs.

In addition, under the USA PATRIOT Act, the Secretary of the Treasury has adopted rules addressing a number of related issues, including increasing the cooperation and information sharing between financial institutions, regulators, and law enforcement authorities regarding individuals, entities and organizations engaged in, or reasonably suspected based on credible evidence of engaging in, terrorist acts or money laundering activities. Any financial institution complying with these rules will not be deemed to violate the privacy provisions of the Gramm-Leach-Bliley Act that are discussed below. Finally, under the regulations of the Office of Foreign Asset Control, or OFAC, we are required to monitor and block transactions with certain “specially designated nationals” who OFAC has determined pose a risk to U.S. national security.

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Consumer Laws and Regulations

We are also subject to certain consumer laws and regulations that are designed to protect consumers in transactions with banks. While the following list is not exhaustive, these laws and regulations include the Truth in Lending Act, the Truth in Savings Act, the Electronic Funds Transfer Act, the Expedited Funds Availability Act, the Equal Credit Opportunity Act, The Fair and Accurate Credit Transactions Act, The Real Estate Settlement Procedures Act and the Fair Housing Act, among others. These laws and regulations, among other things, prohibit discrimination on the basis of race, gender or other designated characteristics and mandate various disclosure requirements and regulate the manner in which financial institutions must deal with customers when taking deposits or making loans to such customers. These and other laws also limit finance charges or other fees or charges earned in our activities. We must comply with the applicable provisions of these consumer protection laws and regulations as part of our ongoing customer relations.

Technology Risk Management and Consumer Privacy

State and federal banking regulators have issued various policy statements emphasizing the importance of technology risk management and supervision in evaluating the safety and soundness of depository institutions with respect to banks that contract with outside vendors to provide data processing and core banking functions. The use of technology-related products, services, delivery channels and processes exposes a bank to various risks, particularly operational, privacy, security, strategic, reputation and compliance risk. Banks are generally expected to prudently manage technology-related risks as part of their comprehensive risk management policies by identifying, measuring, monitoring and controlling risks associated with the use of technology.

Under Section 501 of the Gramm-Leach-Bliley Act, the federal banking agencies have established appropriate standards for financial institutions regarding the implementation of safeguards to ensure the security and confidentiality of customer records and information, protection against any anticipated threats or hazards to the security or integrity of such records and protection against unauthorized access to or use of such records or information in a way that could result in substantial harm or inconvenience to a customer. Among other matters, the rules require each bank to implement a comprehensive written information security program that includes administrative, technical and physical safeguards relating to customer information.

Under the Gramm-Leach-Bliley Act, a financial institution must also provide its customers with a notice of privacy policies and practices. Section 502 prohibits a financial institution from disclosing nonpublic personal information about a customer to nonaffiliated third parties unless the institution satisfies various notice and opt-out requirements and the customer has not elected to opt out of the disclosure. Under Section 504, the agencies are authorized to issue regulations as necessary to implement notice requirements and restrictions on a financial institution’s ability to disclose nonpublic personal information about customers to nonaffiliated third parties. Under the final rule the regulators adopted, all banks must develop initial and annual privacy notices which describe in general terms the bank’s information sharing practices. Banks that share nonpublic personal information about customers with nonaffiliated third parties must also provide customers with an opt-out notice and a reasonable period of time for the customer to opt out of any such disclosure (with certain exceptions). Limitations are placed on the extent to which a bank can disclose an account number or access code for credit card, deposit or transaction accounts to any nonaffiliated third party for use in marketing.

Monetary Policy

Banks are affected by the credit policies of monetary authorities, including the Federal Reserve Board, that affect the national supply of credit. The Federal Reserve Board regulates the supply of credit in order to influence general economic conditions, primarily through open market operations in United States government obligations, varying the discount rate on financial institution borrowings, varying reserve requirements against financial institution deposits, and restricting certain borrowings by financial institutions and their subsidiaries. The monetary policies of the Federal Reserve Board have had a significant effect on the operating results of banks in the past and are expected to continue to do so in the future.

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Enforcement Powers of Federal Banking Agencies

The Federal Reserve and other state and federal banking agencies and regulators have broad enforcement powers, including the power to terminate deposit insurance, issue cease-and-desist orders, impose substantial fines and other civil and criminal penalties and appoint a conservator or receiver. Our failure to comply with applicable laws, regulations and other regulatory pronouncements could subject us, as well as our officers and directors, to administrative sanctions and potentially substantial civil penalties.

Regulatory Reform and Legislation

The U. S. and global economies have experienced and are experiencing significant stress and disruptions in the financial sector. Dramatic slowdowns in the housing industry with falling home prices and increasing foreclosures and unemployment have created strains on financial institutions, including government-sponsored entities and investment banks. As a result, many financial institutions sought and continue to seek additional capital, merge or seek mergers with larger and stronger institutions and, in some cases, failed.

In response to the financial crisis affecting the banking and financial markets, in October 2008, the Emergency Economic Stabilization Act of 2008 (the “EESA”) was signed into law. Pursuant to the EESA, the U.S. Department of the Treasury (“the Treasury”) was authorized to purchase equity stakes in U. S. financial institutions. Under this program, known as the Troubled Asset Relief Program Capital Purchase Program (the “TARP Capital Purchase Program”), the Treasury made $250 billion of capital available to U.S. financial institutions through the purchase of preferred stock or subordinated debentures by the Treasury. In conjunction with the purchase of preferred stock from publicly-held financial institutions, the Treasury received warrants to purchase common stock with an aggregate market price equal to 15% of the total amount of the preferred investment. Participating financial institutions were required to adopt the Treasury’s standards for executive compensation and corporate governance for the period during which the Treasury holds equity issued under the TARP Capital Purchase Program and were restricted from increasing dividends to common shareholders or repurchasing common stock for three years without the consent of the Treasury. The Company made a decision to not participate in the TARP Capital Purchase Program due to its capital and liquidity positions.

Dodd-Frank Wall Street Reform and Consumer Protection Act

On July 21, 2010, the Dodd-Frank Act was signed into law. The Dodd-Frank Act is intended to effect a fundamental restructuring of federal banking regulation. Among other things, the Dodd-Frank Act creates a new Financial Stability Oversight Council to identify systemic risks in the financial system and gives federal regulators new authority to take control of and liquidate financial firms. The Dodd-Frank Act additionally creates a new independent federal regulator to administer federal consumer protection laws. The Dodd-Frank Act is expected to have a significant impact on our business operations as its provisions take effect. In addition to those provisions discussed above, among the provisions that have affected or could affect us are the following:

Payment of Interest on Business Checking Accounts. Effective one year from the date of enactment, the Dodd-Frank Act eliminated the federal statutory prohibition against the payment of interest on business checking accounts.

Corporate Governance. The Dodd-Frank Act requires publicly traded companies to give stockholders a non-binding vote on executive compensation at their first annual meeting taking place six months after the date of enactment and at least every three years thereafter and on so-called “golden parachute” payments in connection with approvals of mergers and acquisitions unless previously voted on by shareholders. The new legislation also authorizes the Securities and Exchange Commission (“SEC”) to promulgate rules that would allow stockholders to nominate their own candidates using a company’s proxy materials. Additionally, the Dodd-Frank Act directs the federal banking regulators to promulgate rules prohibiting excessive compensation paid to executives of depository institutions and their holding companies with assets in excess of $1.0 billion, regardless of whether the company is publicly traded or not. The Dodd-Frank Act gives the SEC authority to prohibit broker discretionary voting on elections of directors and executive compensation matters.

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Prohibition Against Charter Conversions of Troubled Institutions. Effective one year after enactment, the Dodd-Frank Act prohibits a depository institution from converting from a state to federal charter or vice versa while it is the subject of a cease and desist order or other formal enforcement action or a memorandum of understanding with respect to a significant supervisory matter unless the appropriate federal banking agency gives notice of the conversion to the federal or state authority that issued the enforcement action and that agency does not object within 30 days. The notice must include a plan to address the significant supervisory matter. The converting institution must also file a copy of the conversion application with its current federal regulator which must notify the resulting federal regulator of any ongoing supervisory or investigative proceedings that are likely to result in an enforcement action and provide access to all supervisory and investigative information relating hereto.

Limits on Derivatives. Effective 18 months after enactment, the Dodd-Frank Act prohibits state-chartered banks from engaging in derivatives transactions unless the loans to one borrower limits of the state in which the bank is chartered takes into consideration credit exposure to derivatives transactions. For this purpose, derivative transaction includes any contract, agreement, swap, warrant, note or option that is based in whole or in part on the value of, any interest in, or any quantitative measure or the occurrence of any event relating to, one or more commodities securities, currencies, interest or other rates, indices or other assets.

Debit Card Interchange Fees. Effective July 21, 2011, the Dodd-Frank Act requires that the amount of any interchange fee charged by a debit card issuer with respect to a debit card transaction must be reasonable and proportional to the cost incurred by the issuer. On June 29, 2011, the Federal Reserve Board set the interchange rate cap at $0.24 per transaction. While the restrictions on interchange fees do not apply to banks that, together with their affiliates, have assets of less than $10 billion, the rule could affect the competitiveness of debit cards issued by smaller banks.

Consumer Financial Protection Bureau. The Dodd-Frank Act creates a new, independent federal agency called the Consumer Financial Protection Bureau (“CFPB”), which is granted broad rulemaking, supervisory and enforcement powers under various federal consumer financial protection laws, including the Equal Credit Opportunity Act, Truth in Lending Act, Real Estate Settlement Procedures Act, Fair Credit Reporting Act, Fair Debt Collection Act, the Consumer Financial Privacy provisions of the Gramm-Leach-Bliley Act and certain other statutes. The CFPB has examination and primary enforcement authority with respect to depository institutions with $10 billion or more in assets. Smaller institutions are subject to rules promulgated by the CFPB but continue to be examined and supervised by federal banking regulators for consumer compliance purposes. The CFPB has authority to prevent unfair, deceptive or abusive practices in connection with the offering of consumer financial products. The Dodd-Frank Act authorizes the CFPB to establish certain minimum standards for the origination of residential mortgages including a determination of the borrower’s ability to repay. In addition, the Dodd-Frank Act will allow borrowers to raise certain defenses to foreclosure if they receive any loan other than a “qualified mortgage” as defined by the CFPB. The Dodd-Frank Act permits states to adopt consumer protection laws and standards that are more stringent than those adopted at the federal level and, in certain circumstances, permits state attorneys general to enforce compliance with both the state and federal laws and regulations.

Basel Committee. On September 12, 2010, the Group of Governors and Heads of Supervision, the oversight body of the Basel Committee, announced agreement on the calibration and phase – in arrangements for a strengthened set of capital requirements, known as Basel III. Basel III increases the minimum Tier 1 common equity ratio to 4.5%, net of regulatory deductions, and introduces a capital conservation buffer of an additional 2.5% of common equity to risk – weighted assets, raising the target minimum common equity ratio to 7%. This capital conservation buffer also increases the minimum Tier 1 capital ratio from 6% to 8.5% and the minimum total capital ratio from 8% to 10.5%. In addition, Basel III introduces a countercyclical capital buffer of up to 2.5% of common equity or other fully loss absorbing capital for periods of excess credit growth. Basel III also introduces a non-risk adjusted Tier 1 leverage ratio of 3%, based on a measure of total exposure rather than total assets, and new liquidity standards. The Tier 1 common equity and Tier 1 capital ratio requirements will be phased in incrementally between January 1, 2013 and January 1, 2015; the deductions from common equity made in calculating Tier 1 common equity will be phased in incrementally over a four-year period commencing on January 1, 2014; and the capital conservation buffer will be phased in incrementally between January 1, 2016 and January 1, 2019. The Basel Committee also announced that a countercyclical buffer of 0% to 2.5% of common equity or other fully loss-absorbing capital will be implemented according to national circumstances as an extension of the conservation buffer.

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On June 7, 2012, the U.S. banking agencies requested comment on the three proposed rules that, taken together, would establish an integrated regulatory capital framework implementing the Basel III regulatory capital reforms in the United States. As proposed, the U.S. implementation of Basel III would lead to significantly higher capital requirements and more restrictive leverage and liquidity ratios than those currently in place. Once adopted, these new capital requirements would be phased in over time. Additionally, the U.S. implementation of Basel III contemplates that, for banking organizations with less than $15 billion in assets, the ability to treat trust preferred securities as Tier 1 capital would be phased out over a ten-year period. Comments to the proposed rules were requested by September 7, 2012 in order to begin the gradual integration of the proposed rules on January 1, 2013. U.S. banking agencies have delayed implementation of the proposed rules as they continue weighing views expressed during the comment period. The ultimate impact of the U.S. implementation of the new capital and liquidity standards on the Company and the Bank is currently being reviewed. At this point we cannot determine the ultimate effect that any final regulations, if enacted, would have upon our earnings or financial position. In addition, important questions remain as to how the numerous capital and liquidity mandates of the Dodd-Frank Act will be integrated with the requirements of Basel III.

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the SEC. You may read and copy any document we file at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the public reference room. Our SEC filings are also available to the public at the SEC’s web site at http://www.sec.gov. Our web site is http://www.ffin.com. You may also obtain copies of our annual, quarterly and special reports, proxy statements and certain other information filed with the SEC, as well as amendments thereto, free of charge from our web site. These documents are posted to our web site after we have filed them with the SEC. Our corporate governance guidelines, including our code of conduct applicable to all our employees, officers and directors, as well as the charters of our audit and nominating committees, are available at www.ffin.com. The foregoing information is also available in print to any shareholder who requests it. Except as explicitly provided, information on any web site is not incorporated into this Form 10-K or our other securities filings and is not a part of them.

ITEM 1A. RISK FACTORS

Our business, financial condition, operating results and cash flows can be impacted by a number of factors, including but not limited to those set forth below, any one of which could cause our actual results to vary materially from recent results or from our anticipated future results and other forward-looking statements that we make from time to time in our news releases, annual reports and other written communications, as well as oral forward-looking statements, and other statements made from time to time by our representatives.

Our business faces unpredictable economic conditions, which could have an adverse effect on us.

General economic conditions impact the banking industry. The credit quality of our loan portfolio necessarily reflects, among other things, the general economic conditions in the areas in which we conduct our business. Our continued financial success depends somewhat on factors beyond our control, including:

• general economic conditions, including national and local real estate markets;

• the supply of and demand for investable funds;

• demand for loans and access to credit;

• interest rates; and

• federal, state and local laws affecting these matters.

Any substantial deterioration in any of the foregoing conditions could have a material adverse effect on our financial condition, results of operations and liquidity, which would likely adversely affect the market price of our common stock.

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In our business, we must effectively manage our credit risk.

As a lender, we are exposed to the risk that our loan customers may not repay their loans according to the terms of these loans and the collateral securing the payment of these loans may be insufficient to fully compensate us for the outstanding balance of the loan plus the costs to dispose of the collateral. We may experience significant loan losses, which could have a material adverse effect on our operating results and financial condition. Management makes various assumptions and judgments about the collectibility of our loan portfolio, including the diversification by industry of our commercial loan portfolio, the amount of nonperforming loans and related collateral, the volume, growth and composition of our loan portfolio, the effects on the loan portfolio of current economic indicators and their probable impact on borrowers and the evaluation of our loan portfolio through our internal loan review process and other relevant factors.

We maintain an allowance for credit losses, which is an allowance established through a provision for loan losses charged to expense that represents management’s best estimate of probable losses inherent in our loan portfolio. Additional credit losses will likely occur in the future and may occur at a rate greater than we have experienced to date. In determining the amount of the allowance, we rely on an analysis of our loan portfolio, our experience and our evaluation of general economic conditions. If our assumptions prove to be incorrect, our current allowance may not be sufficient and adjustments may be necessary to allow for different economic conditions or adverse developments in our loan portfolio. Material additions to the allowance could materially decrease our net income.

In addition, banking regulators periodically review our allowance for credit losses and may require us to increase our provision for credit losses or recognize further charge-offs, based on judgments different than those of our management. Any increase in our allowance for credit losses or charge-offs as required by these regulatory agencies could have a material negative effect on our operating results, financial condition and liquidity.

Our business is concentrated in Texas and a downturn in the economy of Texas may adversely affect our business.

Our network of bank regions is concentrated in Texas, primarily in the Western and North Central regions of the state. Most of our customers and revenue are derived from this area. The economy of this region is focused on agriculture (including farming and ranching), commercial and industrial, medical, education, wind energy, manufacturing, service, oil and gas production, and real estate. Because we generally do not derive revenue or customers from other parts of the state or nation, our business and operations are dependent on economic conditions in this part of Texas. Any significant decline in one or more segments of the local economy could adversely affect our business, revenue, operations and properties.

Changes in economic conditions could cause an increase in delinquencies and non-performing assets, including loan charge-offs, which could depress our net income and growth.

Our loan portfolios include many real estate secured loans, demand for which may decrease during economic downturns as a result of, among other things, an increase in unemployment, a decrease in real estate values and, a slowdown in housing. If we continue to see negative economic conditions in the United States as a whole or in the portions of Texas that we serve, we could experience higher delinquencies and loan charge-offs, which would reduce our net income and adversely affect our financial condition. Furthermore, to the extent that real estate collateral is obtained through foreclosure, the costs of holding and marketing the real estate collateral, as well as the ultimate values obtained from disposition, could reduce our earnings and adversely affect our financial condition.

The value of real estate collateral may fluctuate significantly resulting in an under-collateralized loan portfolio.

The market value of real estate, particularly real estate held for investment, can fluctuate significantly in a short period of time as a result of market conditions in the geographic area in which the real estate is located. If the value of the real estate serving as collateral for our loan portfolio were to decline materially, a significant part of our loan portfolio could become under-collateralized. If the loans that are collateralized by real estate become troubled during a time when market conditions are declining or have declined, then, in the event of foreclosure, we may not be able to realize the amount of collateral that we anticipated at the time of originating the loan. This could have a material adverse effect on our provision for loan losses and our operating results and financial condition.

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The repeal of prohibitions on paying of interest on demand deposits could increase our interest expense.

Effective in July 2011, all federal prohibitions on financial institutions paying interest on demand deposit accounts were repealed as part of the Dodd-Frank Act. As a result, some financial institutions have commenced and are considering offering interest on demand deposits to compete for customers. Our interest expense could increase and our net interest margin could decrease if we begin offering interest on demand deposits to maintain current customers or attract new customers, which could have a material adverse effect on our financial condition and results of operations.

We do business with other financial institutions that could experience financial difficulty.

We do business through the purchase and sale of Federal funds, check clearing and through the purchase and sale of loan participations with other financial institutions. Because these financial institutions have many risks, as do we, we could be adversely affected should one of these financial institutions experience significant financial difficulties or fail to comply with our agreements with them.

Recent developments in the mortgage market may affect our ability to originate loans and the profitability of loans in our mortgage pipeline.

During the past several years, the real estate housing market throughout the United States has softened resulting in an industry-wide increase in borrowers unable to make their mortgage payments and increased foreclosure rates. Lenders in certain sections of the housing and mortgage markets were forced to close or limit their operations or seek additional capital. In response, financial institutions have tightened their underwriting standards, limiting the availability of sources of credit and liquidity. If the housing/real estate market continues to have problems in the future, there could be a prolonged decrease in the demand for our loans in the secondary market, adversely affecting our earnings.

If we are unable to continue to originate residential real estate loans and sell them into the secondary market for a profit, our earnings could decrease.

We derive a portion of our noninterest income from the origination of residential real estate loans and the subsequent sale of such loans into the secondary market. If we are unable to continue to originate and sell residential real estate loans at historical or greater levels, our residential real estate loan volume would decrease, which could decrease our earnings. A rising interest rate environment, general economic conditions or other factors beyond our control could adversely affect our ability to originate residential real estate loans. We also are experiencing an increase in regulations and compliance requirements related to mortgage loan originations necessitating technology upgrades and other changes. If new regulations continue to increase and we are unable to make technology upgrades, our ability to originate mortgage loans will be reduced or eliminated. Additionally, we sell a large portion of our residential real estate loans to third party investors, and rising interest rates could negatively affect our ability to generate suitable profits on the sale of such loans. If interest rates increase after we originate the loans, our ability to market those loans is impaired as the profitability on the loans decreases. These fluctuations can have an adverse effect on the revenue we generate from residential real estate loans and in certain instances, could result in a loss on the sale of the loans.

Further, for the mortgage loans we sell in the secondary market, the mortgage loan sales contracts contain indemnification clauses should the loans default, generally in the first sixty to ninety days, or if documentation is determined not to be in compliance with regulations. While the Company’s historic losses as a result of these indemnities have been insignificant, we could be required to repurchase the mortgage loans or reimburse the purchaser of our loans for losses incurred. Both of these situations could have an adverse effect on the profitability of our mortgage loan activities and negatively impact our net income.

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We may need to raise additional capital/liquidity and such funds may not be available when needed.

We may need to raise additional capital/liquidity in the future to provide us with sufficient capital resources and liquidity to meet our commitments and business needs, particularly if our asset quality or earnings were to deteriorate significantly. Our ability to raise additional capital/liquidity, if needed, will depend on, among other things, conditions in the capital and financial markets at that time, which are outside of our control, and our financial performance. Economic conditions and the loss of confidence in financial institutions may increase our cost of funding and limit access to certain customary sources of capital/liquidity, including depositors, other financial institution borrowings, repurchase agreements and borrowings from the discount window of the Federal Reserve. Any occurrence that may limit our access to the capital/liquidity markets, such as a decline in the confidence of other financial institutions, depositors or counterparties participating in the capital markets, may adversely affect our costs and our ability to raise capital/liquidity. An inability to raise additional capital/liquidity on acceptable terms when needed could have a materially adverse effect on our financial condition, results of operations and liquidity.

The trust wealth management fees we receive may decrease as a result of poor investment performance, in either relative or absolute terms, which could decrease our revenues and net earnings.

Our trust company subsidiary derives its revenues primarily from investment management fees based on assets under management. Our ability to maintain or increase assets under management is subject to a number of factors, including investors’ perception of our past performance, in either relative or absolute terms, market and economic conditions, including changes in oil and gas prices, and competition from investment management companies. Financial markets are affected by many factors, all of which are beyond our control, including general economic conditions, including changes in oil and gas prices; securities market conditions; the level and volatility of interest rates and equity prices; competitive conditions; liquidity of global markets; international and regional political conditions; regulatory and legislative developments; monetary and fiscal policy; investor sentiment; availability and cost of capital; technological changes and events; outcome of legal proceedings; changes in currency values; inflation; credit ratings; and the size, volume and timing of transactions. A decline in the fair value of the assets under management, caused by a decline in general economic conditions, would decrease our wealth management fee income.

Investment performance is one of the most important factors in retaining existing clients and competing for new wealth management clients. Poor investment performance could reduce our revenues and impair our growth in the following ways:

• existing clients may withdraw funds from our wealth management business in favor of better performing products;

• asset-based management fees could decline from a decrease in assets under management;

• our ability to attract funds from existing and new clients might diminish; and

• our wealth managers and investment advisors may depart, to join a competitor or otherwise.

Even when market conditions are generally favorable, our investment performance may be adversely affected by the investment style of our wealth management and investment advisors and the particular investments that they make. To the extent our future investment performance is perceived to be poor in either relative or absolute terms, the revenues and profitability of our wealth management business will likely be reduced and our ability to attract new clients will likely be impaired. As such, fluctuations in the equity and debt markets can have a direct impact upon our net earnings.

Certain of our investment advisory and wealth management contracts are subject to termination on short notice, and termination of a significant number of investment advisory contracts could have a material adverse impact on our revenue.

Certain of our investment advisory and wealth management clients can terminate, with little or no notice, their relationships with us, reduce their aggregate assets under management, or shift their funds to other types of accounts with different rate structures for any number of reasons, including investment performance, changes in prevailing interest rates, inflation, changes in investment preferences of clients, changes in our reputation in the marketplace, change in management or control of clients, loss of key investment management personnel and financial market performance. We cannot be certain that our trust company subsidiary will be able to retain all of its clients. If its clients terminate their investment advisory and wealth management contracts, our trust company subsidiary, and consequently we, could lose a substantial portion of our revenues.

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We are subject to possible claims and litigation pertaining to fiduciary responsibility.

From time to time, customers could make claims and take legal action pertaining to our performance of our fiduciary responsibilities. Whether customer claims and legal action related to our performance of our fiduciary 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 financial liability and/or adversely affect our market perception of our products and services as well as impact customer demand for those products and services. Any financial liability or reputation 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.

Our business is subject to significant government regulation.

We operate in a highly regulated environment and are subject to supervision and regulation by a number of governmental regulatory agencies, including the Texas Department of Banking, the Federal Reserve Board, the OCC, and the FDIC. Regulations adopted by these agencies, which are generally intended to provide protection for depositors and customers rather than for the benefit of shareholders, govern a comprehensive range of matters relating to ownership and control of our shares, our acquisition of other companies and businesses, permissible activities for us to engage in, maintenance of adequate capital levels and other aspects of our operations. The bank regulatory agencies possess broad authority to prevent or remedy unsafe or unsound practices or violations of law.

The Dodd-Frank Act, enacted in July 2010, instituted major changes to the banking and financial institutions regulatory regimes in light of the recent performance of and government intervention in the financial services sector. Other changes to statues, regulations or regulatory policies, including changes in interpretation or implementation of statutes, regulations or policies, could affect the Company in substantial and unpredictable ways. Such changes could subject the Company to reduced revenues, additional costs, limit the types of financial services and products the Company may offer and/or increase the ability of non-banks to offer competing financial services and products, among other things. Failure to comply with laws, regulations or policies could result in sanctions by regulatory agencies, civil money penalties and/or reputation damage, which could have a material adverse effect on the Company’s business, financial condition and results of operations.

Included in the Dodd-Frank Act are, for example, changes related to interchange fees and overdraft services. While the changes for interchange fees that can be charged for electronic debit transactions by payment card issuers relate only to banks with assets greater than $10 billion, concern exists that the regulations will also impact our Company. Beginning in the third quarter of 2010, we were prohibited from charging customers fees for paying overdrafts on automated teller machine and debit card transactions, unless the consumer opts in. We continue to monitor the impact of these new regulations and other developments on our service charge revenue.

Our FDIC insurance assessments could increase substantially resulting in higher operating costs.

We have historically paid the lowest premium rate available due to our sound financial position. In 2009, a special assessment ($1.4 million for the Company) was paid by the Company. Should bank failures continue to occur, FDIC premiums could remain high or increase or additional special assessments could be imposed. These increased premiums would have an adverse effect on our net income and results of operations.

We compete with many larger financial institutions which have substantially greater financial resources than we have.

Competition among financial institutions in Texas is intense. We compete with other bank holding companies, state and national commercial banks, savings and loan associations, consumer financial companies, credit unions, securities brokers, insurance companies, mortgage banking companies, money market mutual funds, asset-based non-bank lenders and other financial institutions. Many of these competitors have substantially greater financial resources, larger lending limits, larger branch networks and less regulatory oversight than we do, and are able to offer a broader range of products and services than we can. Failure to compete effectively for deposit, loan and other banking customers in our markets could cause us to lose market share, slow our growth rate and may have an adverse effect on our financial condition, results of operations and liquidity.

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We are subject to interest rate risk.

Our profitability is dependent to a large extent on our net interest income, which is the difference between interest income we earn as a result of interest paid to us on loans and investments and interest we pay to third parties such as our depositors and those from whom we borrow funds. Like most financial institutions, we are highly sensitive to many factors that are beyond our control, including general economic conditions and policies of various governmental and regulatory agencies and, in particular, the Federal Reserve Board. Changes in monetary policy, including changes in interest rates, could influence not only the interest we receive on loans and securities and the amount of interest we pay on deposits and borrowings, but such changes could also affect (i) our ability to originate loans and obtain deposits, (ii) the fair value of our financial assets and liabilities, and (iii) the average duration of the Company’s securities portfolio. If the interest rates paid on deposits and other borrowings increase at a faster rate than the interest rates received on loans and investments, our net interest income, and earnings, could be adversely affected. Earnings could also be adversely affected if the interest rates received on loans and investments fall more quickly than the interest rates paid on deposits and other borrowings.

Although we have implemented strategies which we believe reduce the potential effects of adverse changes in interest rates on our results of operations, these strategies may not always be successful. In addition, any substantial and prolonged increase in market interest rates could reduce our customers’ desire to borrow money from us or adversely affect their ability to repay their outstanding loans by increasing their credit costs since most of our loans have adjustable interest rates that reset periodically. Any of these events could adversely affect our results of operations, financial condition and liquidity.

First Financial Bankshares, Inc. relies on dividends from its subsidiaries for most of its revenue.

First Financial Bankshares, Inc. is a separate and distinct legal entity from its subsidiaries. It receives substantially all of its revenue from dividends paid by its subsidiaries. These dividends are the principal source of funds to pay dividends on the Company’s common stock and interest and principal on First Financial Bankshares, Inc. debt (if we had balances outstanding). Various federal and/or state laws and regulations limit the amount of dividends that our bank subsidiaries may pay to First Financial Bankshares, Inc. In the event our subsidiaries are unable to pay dividends to First Financial Bankshares, Inc., First Financial Bankshares, Inc. may not be able to service debt or pay dividends on the Company’s common stock. The inability to receive dividends from our subsidiaries could have a material adverse effect on the Company’s business, financial condition, results of operations and liquidity.

To continue our growth, we are affected by our ability to identify and acquire other financial institutions.

We intend to continue our current growth strategy. This strategy includes opening new branches and acquiring other banks that serve customers or markets we find desirable. The market for acquisitions remains highly competitive, and we may be unable to find satisfactory acquisition candidates in the future that fit our acquisition and growth strategy. To the extent that we are unable to find suitable acquisition candidates, an important component of our growth strategy may be lost. Additionally, our completed acquisitions, or any future acquisitions, may not produce the revenue, earnings or synergies that we anticipated.

Use of our common stock for future acquisitions or to raise capital may be dilutive to existing stockholders.

When we determine that appropriate strategic opportunities exist, we may acquire other financial institutions and related businesses, subject to applicable regulatory requirements. We may use our common stock for such acquisitions. From time to time, we may also seek to raise capital through selling additional common stock. It is possible that the issuance of additional common stock in such acquisition or capital transactions may be dilutive to the interests of our existing shareholders.

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Our operational and financial results are affected by our ability to successfully integrate our acquisitions.

Acquisitions of financial institutions involve operational risks and uncertainties and acquired companies may have unforeseen liabilities, exposure to asset quality problems, key employee and customer retention problems and other problems that could negatively affect our organization. We may not be able to successfully integrate the operations, management, products and services of the entities that we acquire nor eliminate redundancies. The integration process may also require significant time and attention from our management that they would otherwise direct at servicing existing business and developing new business. Our failure to successfully integrate the entities we acquire into our existing operations may increase our operating costs significantly and adversely affect our business and earnings.

The value of our goodwill and other intangible assets may decline in the future.

As of December 31, 2012, we had $72.0 million of goodwill and other intangible assets. A significant decline in our financial condition, a significant adverse change in the business climate, slower growth rates or a significant and sustained decline in the price of our common stock may necessitate taking charges in the future related to the impairment of our goodwill and other intangible assets. If we were to conclude that a future write-down of goodwill and other intangible assets is necessary, we would record the appropriate charge, which could have a material adverse effect on our financial condition and results of operations.

We rely heavily on our management team, and the unexpected loss of key management may adversely affect our operations.

Our success to date has been strongly influenced by our ability to attract and to retain senior management experienced in banking in the markets we serve. Our ability to retain executive officers and the current management teams will continue to be important to successful implementation of our strategies. We do not have employment agreements with these key employees other than executive agreements in the event of a change of control and a confidential information, non-solicitation and non-competition agreement related to our stock options. The unexpected loss of services of any key management personnel, or the inability to recruit and retain qualified personnel in the future, could have an adverse effect on our business and financial results.

The Company may not be able to attract and retain skilled people.

The Company’s success depends, in large part, on its ability to attract and retain key people. Competition for the best people in most activities engaged in by the Company can be intense and the Company may not be able to hire people or to retain them. The unexpected loss of services of one or more of the Corporation’s key personnel could have a material adverse impact on the Company’s business because of their skills, knowledge of the Company’s market, years of industry experience and the difficulty of promptly finding qualified replacement personnel.

The Company’s stock price can be volatile.

Stock price volatility may make it more difficult for you to resell your common stock when you want and at prices you find attractive. The Company’s stock price can fluctuate significantly in response to a variety of factors including, among other things:

• actual or anticipated variations in quarterly results of operations;

• recommendations by securities analysts;

• operating and stock price performance of other companies that investors deem comparable to the Company;

• new reports relating to trends, concerns and other issues in the financial services industry;

• perceptions in the marketplace regarding the Company and/or its competitors;

• new technology used, or services offered, by competitors;

22

• significant acquisitions or business combinations involving the Company or its competitors; and

• changes in government regulations, including tax laws.

General market fluctuations, industry factors and general economic and political conditions and events, such as economic slowdowns or recessions, interest rate changes or credit loss trends could also cause the Company’s stock price to decrease regardless of operations results.

Breakdowns in our internal controls and procedures could have an adverse effect on us.

We believe our internal control system as currently documented and functioning is adequate to provide reasonable assurance over our internal controls. Nevertheless, because of the inherent limitation in administering a cost effective control system, misstatements due to error or fraud may occur and not be detected. Breakdowns in our internal controls and procedures could occur in the future, and any such breakdowns could have an adverse effect on us. See “Item 9A – Controls and Procedures” for additional information.

We compete in an industry that continually experiences technological change, and we may have fewer resources than many of our competitors to continue to invest in technological improvements.

The financial services industry is undergoing rapid technological changes, with frequent introductions of new technology-driven products and services. In addition to improving the ability to serve customers, the effective use of technology increases efficiency and enables financial institutions to reduce costs. Our future success will depend, in part, upon our ability to address the needs of our customers by using technology to provide products and services that will satisfy customer demands for conveniences, as well as to create additional efficiencies in our operations. Many of our larger competitors have substantially greater resources to invest in technological improvements. We may not be able to effectively implement new technology-driven products and services or be successful in marketing these products and services to our customers.

System failure or cybersecurity breaches of our network security could subject us to increased operating costs as well as litigation and other potential losses.

The computer systems and network infrastructure we use could be vulnerable to unforeseen hardware and cybersecurity issues. Our operations are dependent upon our ability to protect our computer equipment against damage from fire, power loss, telecommunications failure or a similar catastrophic event. Any damage or failure that causes an interruption in our operations could have an adverse effect on our financial condition and results of operations. In addition, our operations are dependent upon our ability to protect the computer systems and network infrastructure utilized by us, including our Internet banking activities, against damage from physical break-ins, cybersecurity breaches and other disruptive problems caused by the Internet or other users. Such computer break-ins and other disruptions would jeopardize the security of information stored in and transmitted through our computer systems and network infrastructure, which may result in significant liability to us, damage our reputation and inhibit current and potential customers from our Internet banking services. Each year, we add additional security measures to our computer systems and network infrastructure to mitigate the possibility of cybersecurity breaches including firewalls and penetration testing. We continue to investigate cost effective measures as well as insurance protection.

An investment in our common stock is not an insured deposit.

Our common stock is not a bank deposit and, therefore, is not insured against loss by the FDIC, any other deposit insurance fund, or by any other public or private entity. Investment in our common stock is inherently risky for the reasons described in this “Risk Factors” section and elsewhere in this Report. As a result, if you acquire our common stock, you may lose some or all of your investment.

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ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

ITEM 2. PROPERTIES

Our principal office is located in the First Financial Bank Building at 400 Pine Street in downtown Abilene, Texas. We lease two spaces in a building owned by First Financial Bank, National Association, Abilene totaling approximately 4,500 square feet. Our subsidiaries collectively own 46 banking facilities, some of which are detached drive-ins, and also lease eight banking facilities and 15 ATM locations. Our management considers all our existing locations to be well-suited for conducting the business of banking. We believe our existing facilities are adequate to meet our requirements and our subsidiaries’ requirements for the foreseeable future.

ITEM 3. LEGAL PROCEEDINGS

From time to time we and our subsidiaries are parties to lawsuits arising in the ordinary course of our banking business. However, there are no material pending legal proceedings to which we, our subsidiaries or our other direct and indirect subsidiaries, or any of their properties, are currently subject. Other than regular, routine examinations by state and federal banking authorities, there are no proceedings pending or known to be contemplated by any governmental authorities.

ITEM 4. MINE SAFETY DISCLOSURES

Not Applicable.

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PART II

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

Market Information

Our common stock, par value $0.01 per share, is traded on the Nasdaq Global Select Market under the trading symbol FFIN. See “Item 8 – Financial Statements and Supplementary Data – Quarterly Financial Data” for the high, low and closing sales prices as reported by the Nasdaq Global Select Market for our common stock for the periods indicated.

Record Holders

As of February 1, 2013, we had approximately 1,250 shareholders of record.

Dividends

See “Item 8 – Financial Statements and Supplementary Data – Quarterly Results of Operations” for the frequency and amount of cash dividends paid by us. Also, see “Item 1 – Business – Supervision and Regulation – Payment of Dividends” and “Item 7 – Management’s Discussion and Analysis of the Financial Condition and Results of Operations – Liquidity – Dividends” for restrictions on our present or future ability to pay dividends, particularly those restrictions arising under federal and state banking laws.

Equity Compensation Plans

See “Item 12 – Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters”.

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PERFORMANCE GRAPH

The following performance graph compares cumulative total shareholder returns for our common stock, the Russell 3000 Index, and the SNL Bank Index, which is a banking index prepared by SNL Financial LC and is comprised of banks with $1 billion to $5 billion in total assets, for a five-year period (December 31, 2007 to December 31, 2012). The performance graph assumes $100 invested in our common stock at its closing price on December 31, 2007, and in each of the Russell 3000 Index and the SNL Bank Index on the same date. The performance graph also assumes the reinvestment of all dividends. The dates on the performance graph represents the last trading day of each year indicated. The amounts noted on the performance graph have been adjusted to give effect to all stock splits and stock dividends.

	Period Ending
Index	12/31/07		12/31/08		12/31/09		12/31/10		12/31/11		12/31/12
First Financial Bankshares, Inc.		100.00		150.92		152.42		148.01		149.28		179.12
Russell 3000		100.00		62.69		80.46		94.08		95.05		110.65
SNL Bank $1B-$5B		100.00		82.94		59.45		67.39		61.46		75.78

Source : SNL Financial LC, Charlottesville, VA

^© 2013

www.snl.com

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ITEM 6. SELECTED FINANCIAL DATA

The selected financial data presented below as of and for the years ended December 31, 2012, 2011, 2010, 2009, and 2008, have been derived from our audited consolidated financial statements. The selected financial data should be read in conjunction with “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and accompanying notes presented elsewhere in this Form 10-K. The results of operations presented below are not necessarily indicative of the results of operations that may be achieved in the future. Management’s Discussion and Analysis of Financial Condition and Results of Operations incorporates information required to be disclosed by the SEC’s Industry Guide 3, “Statistical Disclosure by Bank Holding Companies.”

	Year Ended December 31,
	2012			2011			2010			2009			2008
	(dollars in thousands, except per share data)
Summary Income Statement Information:
Interest income	$	159,796		$	160,021		$	149,699		$	146,445		$	159,154
Interest expense		5,112			8,024			13,528			17,274			35,259
Net interest income		154,684			151,997			136,171			129,171			123,895
Provision for loan losses		3,484			6,626			8,962			11,419			7,957
Noninterest income		57,209			51,438			49,478			48,598			49,453
Noninterest expense		109,049			104,624			98,256			94,000			91,587
Earnings before income taxes and extraordinary item		99,360			92,185			78,431			72,350			73,804
Income tax expense		25,135			23,816			20,068			18,553			20,640
Net earnings before extraordinary item		74,225			68,369			58,363			53,797			53,164
Extraordinary item		—			—			1,296			—			—
Net earnings	$	74,225		$	68,369		$	59,659		$	53,797		$	53,164
Per Share Data:
Earnings per share, basic before extraordinary item	$	2.36		$	2.17		$	1.87		$	1.72		$	1.71
Earnings per share, assuming dilution before extraordinary item		2.36			2.17			1.87			1.72			1.70
Earnings per share, basic		2.36			2.17			1.91			1.72			1.71
Earnings per share, assuming dilution		2.36			2.17			1.91			1.72			1.70
Cash dividends declared		0 .99			0.95			0.91			0.91			0.89
Book value at period-end		17.68			16.16			14.06			13.31			11.82
Earnings performance ratios:
Return on average assets		1.75	%		1.78	%		1.75	%		1.72	%		1.74	%
Return on average equity		13.85			14.44			13.74			13.63			15.27
Summary Balance Sheet Data (Period-end):
Securities	$	1,820,096		$	1,844,998		$	1,546,242		$	1,285,377		$	1,318,406
Loans		2,088,623			1,786,544			1,690,346			1,514,369			1,566,143
Total assets		4,502,012			4,120,531			3,776,367			3,279,456			3,212,385
Deposits		3,632,584			3,334,798			3,113,301			2,684,757			2,582,753
Total liabilities		3,945,049			3,611,994			3,334,679			2,863,754			2,843,603
Total shareholders’ equity		556,963			508,537			441,688			415,702			368,782
Asset quality ratios:
Allowance for loan losses/period-end loans		1.67	%		1.92	%		1.84	%		1.82	%		1.37	%
Nonperforming assets/period-end loans plus foreclosed assets		1.22			1.64			1.53			1.46			0.80
Net charge offs/average loans		0.15			0.20			0.35			0.36			0.25
Capital ratios:
Average shareholders’ equity/average assets		12.65	%		12.30	%		12.76	%		12.63	%		11.37	%
Leverage ratio (1)		10.60			10.33			10.28			10.69			9.68
Tier 1 risk-based capital (2)		17.43			17.49			17.01			17.73			15.89
Total risk-based capital (3)		18.68			18.74			18.26			18.99			17.04
Dividend payout ratio		41.99			43.57			47.58			52.63			52.41

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(1) Calculated by dividing at period-end, shareholders’ equity (before accumulated other comprehensive earnings/loss) less intangible assets by fourth quarter average assets less intangible assets.

(2) Calculated by dividing at period-end, shareholders’ equity (before accumulated other comprehensive earnings/loss) less intangible assets by risk-adjusted assets.

(3) Calculated by dividing at period-end, shareholders’ equity (before accumulated other comprehensive earnings/loss) less intangible assets plus allowance for loan losses to the extent allowed under regulatory guidelines by risk-adjusted assets.

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

Introduction

As a financial holding company, we generate most of our revenue from interest on loans and investments, trust fees, and service charges on deposits. Our primary source of funding for our loans and investments are deposits held by our bank subsidiary. Our largest expenses are interest on these deposits and salaries and related employee benefits. We usually measure our performance by calculating our return on average assets, return on average equity, our regulatory leverage and risk based capital ratios, and our efficiency ratio, which is calculated by dividing noninterest expense by the sum of net interest income on a tax equivalent basis and noninterest income.

The following discussion and analysis of the major elements of our consolidated balance sheets as of December 31, 2012 and 2011, and consolidated statements of earnings for the years 2010 through 2012 should be read in conjunction with our consolidated financial statements, accompanying notes, and selected financial data presented elsewhere in this Form 10-K.

Critical Accounting Policies

We prepare consolidated financial statements based on generally accepted accounting principles and customary practices in the banking industry. These policies, in certain areas, require us to make significant estimates and assumptions.

We deem a policy critical if (1) the accounting estimate required us to make assumptions about matters that are highly uncertain at the time we make the accounting estimate; and (2) different estimates that reasonably could have been used in the current period, or changes in the accounting estimate that are reasonably likely to occur from period to period, would have a material impact on the financial statements.

We deem our most critical accounting policies to be (1) our allowance for loan losses and our provision for loan losses and (2) our valuation of securities. We have other significant accounting policies and continue to evaluate the materiality of their impact on our consolidated financial statements, but we believe these other policies either do not generally require us to make estimates and judgments that are difficult or subjective, or it is less likely they would have a material impact on our reported results for a given period. A discussion of (1) our allowance for loan losses and our provision for loan losses and (2) our valuation of securities is included in Note 1 to our Consolidated Financial Statements.

Consolidation of Bank Charters

Effective December 30, 2012, the Company consolidated its eleven bank charters into one charter. Regulatory, compliance and technology complexities and the opportunity for cost savings was the reason for making this change. We expect to operate the prior eleven bank charters as regions with local management decisions with recommendations from the bank regions’s advisory board to benefit the customers and communities it serves as we do currently.

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Stock Split

On April 26, 2011, the Company’s Board of Directors declared a three-for-two stock split in the form of a 50% stock dividend effective for shareholders of record on May 16, 2011 that was distributed on June 1, 2011. All share and per share amounts in this report have been restated to reflect this stock split. An amount equal to the par value of the additional common shares to be issued pursuant to the stock split was reflected as a transfer from retained earnings to common stock on the consolidated financial statements as of and for the year ended December 31, 2011.

Results of Operations

Performance Summary. Net earnings for 2012 were $74.2 million, an increase of $5.9 million, or 8.57%, over net earnings for 2011 of $68.4 million. Net earnings for 2010 were $59.7 million. The increases in net earnings for 2012 over 2011 and 2011 over 2010 were primarily attributable to growth in net interest income and noninterest income.

Net earnings for 2010 included income from an extraordinary item totaling $1.3 million, after related income taxes, related to the expropriation of a portion of our real property. The Texas Department of Transportation (TXDOT) expropriated a portion of real property at our Southlake bank location to expand highway access. TXDOT paid $2.2 million for land and damages to our existing property resulting in a net gain of $2.0 million before income taxes. As a result, our current location’s accessibility significantly deteriorated and we constructed a new bank location in Southlake and sold the existing location in 2011.

On a basic net earnings per share basis, net earnings were $2.36 for 2012 as compared to $2.17 for 2011 and $1.91 for 2010. Basic earnings per share before the extraordinary item were $2.36 for 2012 as compared to $2.17 for 2011 and $1.87 for 2010. The return on average assets was 1.75% for 2012 as compared to 1.78% for 2011 and 1.75% for 2010. The return on average equity was 13.85% for 2012 as compared to 14.44% for 2011 and 13.74% for 2010. All the 2010 amounts include the extraordinary item.

Net Interest Income. Net interest income is the difference between interest income on earning assets and interest expense on liabilities incurred to fund those assets. Our earning assets consist primarily of loans and investment securities. Our liabilities to fund those assets consist primarily of noninterest-bearing and interest-bearing deposits. Tax-equivalent net interest income was $169.3 million in 2012 as compared to $164.8 million in 2011 and $147.1 million in 2010. The increase in 2012 compared to 2011 was largely attributable to an increase in the volume of earning assets. Average earning assets were $3.95 billion in 2012, as compared to $3.57 billion in 2011 and $3.14 billion in 2010. Average earning assets increased $380.4 million in 2012 with increases in all categories of earning assets, except for short-term investments. The yield on earning assets decreased 43 basis points in 2012, whereas the rate paid on interest-bearing liabilities decreased 14 basis points. The increase in 2011 compared to 2010 also resulted from an increase in the volume of earnings assets and from the decrease in the rates paid on interest-bearing liabilities.

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Table 1 allocates the change in tax-equivalent net interest income between the amount of change attributable to volume and to rate.

Table 1 — Changes in Interest Income and Interest Expense (in thousands):

	2012 Compared to 2011									2011 Compared to 2010
	Change Attributable to						Total Change			Change Attributable to						Total Change
	Volume			Rate						Volume			Rate
Short-term investments	$	(369	)	$	(97	)	$	(466	)	$	(76	)	$	(245	)	$	(321	)
Taxable investment securities		1,451			(7,854	)		(6,403	)		6,680			(5,186	)		1,494
Tax-exempt investment securities (1)		11,259			(6,185	)		5,074			5,805			(835	)		4,970
Loans (1) (2)		11,342			(7,985	)		3,357			10,439			(4,309	)		6,130
Interest income		23,683			(22,121	)		1,562			22,848			(10,575	)		12,273
Interest-bearing deposits		323			(3,268	)		(2,945	)		1,467			(6,716	)		(5,249	)
Short-term borrowings		65			(31	)		34			63			(318	)		(255	)
Interest expense		388			(3,299	)		(2,911	)		1,530			(7,034	)		(5,504	)
Net interest income	$	23,295		$	(18,822	)	$	4,473		$	21,318		$	(3,541	)	$	17,777

(1) Computed on tax-equivalent basis assuming marginal tax rate of 35%.

(2) Non-accrual loans are included in loans.

The net interest margin, which measures tax-equivalent net interest income as a percentage of average earning assets, is illustrated in Table 2 for the years 2010 through 2012. The net interest margin in 2012 was 4.28%, a decrease of 34 basis points from 2011 and a decrease of 6 basis points from 2010. The decrease in our net interest margin in 2012 was largely the result of the extended period of historically low levels of short-term interest rates. The Federal funds rates remained at zero to 0.25% during 2010 to 2012. We have been able to somewhat mitigate the impact of low short-term interest rates by establishing minimum interest rates on certain of our loans, improving the pricing for loan risk, and reducing rates paid on interest bearing liabilities. We expect interest rates to remain at the current low levels until 2015 as announced by the Federal Reserve which will continue to place pressure on our interest margin.

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The net interest margin, which measures tax-equivalent net interest income as a percentage of average earning assets, is illustrated in Table 2.

Table 2 — Average Balances and Average Yields and Rates (in thousands, except percentages):

	2012								2011								2010
	Average Balance			Income/ Expense		Yield/ Rate			Average Balance			Income/ Expense		Yield/ Rate			Average Balance			Income/ Expense		Yield/ Rate
Assets
Short-term investments (1)	$	134,588		$	754		0.61	%	$	181,068		$	1,221		0.69	%	$	189,041		$	1,541		0.82	%
Taxable investment securities (2)		1,144,763			31,318		2.74			1,102,356			37,721		3.42			930,731			36,227		3.89
Tax-exempt investment securities (2)(3)		762,754			39,049		5.12			572,895			33,975		5.93			477,357			29,005		6.08
Loans (3)(4)		1,909,890			103,312		5.41			1,715,266			99,955		5.83			1,543,537			93,825		6.08
Total earning assets		3,951,995			174,433		4.41			3,571,585			172,872		4.84			3,140,666			160,598		5.11
Cash and due from banks		120,477								113,423								107,791
Bank premises and equipment, net		80,315								72,381								66,714
Other assets		47,891								51,870								52,965
Goodwill and other intangible assets, net		72,041								72,312								63,691
Allowance for loan losses		(34,802	)							(33,244	)							(29,553	)
Total assets	$	4,237,917							$	3,848,327							$	3,402,274
Liabilities and Shareholders’ Equity
Interest-bearing deposits	$	2,255,239		$	4,877		0.22	%	$	2,165,750		$	7,822		0.36	%	$	1,947,120		$	13,071		0.67	%
Short-term borrowings		258,863			235		0.09			196,230			202		0.10			172,536			457		0.26
Total interest-bearing liabilities		2,514,102			5,112		0.20			2,361,980			8,024		0.34			2,119,656			13,528		0.64
Noninterest-bearing deposits		1,132,862								973,588								811,464
Other liabilities		55,021								39,354								37,002
Total liabilities		3,701,985								3,374,922								2,968,122
Shareholders’ equity		535,932								473,405								434,152
Total liabilities and shareholders’ equity	$	4,237,917							$	3,848,327							$	3,402,274
Net interest income				$	169,321							$	164,848							$	147,070
Rate Analysis:
Interest income/earning assets							4.41	%							4.84	%							5.11	%
Interest expense/earning assets							0.13								0.22								0.43
Net yield on earning assets							4.28	%							4.62	%							4.68	%

(1) Short-term investments are comprised of Fed Funds sold, interest bearing deposits in banks and interest bearing time deposits in banks.

(2) Average balances include unrealized gains and losses on available-for-sale securities.

(3) Computed on a tax-equivalent basis assuming a marginal tax rate of 35%.

(4) Nonaccrual loans are included in loans.

Noninterest Income. Noninterest income for 2012 was $57.2 million, an increase of $5.8 million, or 11.22%, as compared to 2011. Increases in certain categories of noninterest income included (1) ATM, interchange and credit card fees of $1.6 million principally as a result of increased use of debit cards, (2) trust fees of $1.8 million, (3) real estate mortgage operations of $1.2 million and (4) net gain on securities transactions of $2.3 million. Under the Dodd-Frank Act, the Federal Reserve was authorized to establish rules regarding interchange fees charged for electronic debit transactions by payment card issuers. While the changes relate only to banks with assets greater than $10 billion, concern exists that the regulation will also impact our Company in the future. The increase in trust fees was primarily due to the growth in assets under management over the prior year as well as higher fees generated from oil and gas management. The fair value of our trust assets, which are not reflected in our consolidated balance sheet, totaled $2.85 billion at December 31, 2012 compared to $2.43 billion at December 31, 2011. The increases in income from real estate mortgage operations reflected a higher level of refinancing activity due to the favorable interest rate environment and additional resources devoted to expanding the Company’s mortgage loan operations.

These increases in noninterest income were offset by a $996 thousand decrease in service charges on deposit accounts, and a decrease of $690 thousand in net gains on sales of assets when compared to amounts recorded in 2011. The decrease in service charges on deposit accounts was primarily due to a reduction in customer use of overdraft services and changes in overdraft regulations. Beginning in the third quarter of 2010, a new rule issued by the Federal Reserve prohibits financial institutions from charging consumers fees for paying overdrafts on automated teller machine and debit card transactions, unless a consumer consents, or opts in, to the overdraft service for those types of transactions. Consumers must be provided a notice that explains the financial institution’s overdraft services, including the fees associated with the service, and the consumer’s choices. We continue to

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monitor the impact of these new regulations and other related developments on our service charge revenue. The reduction in gains on the sales of assets resulted from a $1.0 million gain recorded in 2011 relating to the sale of former banking facilities in Cleburne and Southlake.

Noninterest income for 2011 was $51.4 million, an increase of $2.0 million, or 4.0%, as compared to 2010. Increases in certain categories of noninterest income included (1) ATM, interchange and credit card fees of $2.3 million principally as a result of increased use of debit cards, (2) trust fees of $1.9 million and (3) the net gain on sale of assets of $945 thousand. Under the Dodd-Frank Act, the Federal Reserve was authorized to establish rules regarding interchange fees charged for electronic debit transactions by payment card issuers. While the changes relate only to banks with assets greater than $10 billion, concern exists that the regulation will also impact our Company in the future. The increase in trust fees reflects higher oil and gas prices and an increase in the market value of the equity investments under management over the prior year. The fair value of our trust assets, which are not reflected in our consolidated balance sheet, totaled $2.43 billion at December 31, 2011 compared to $2.29 billion at December 31, 2010. Included in net gains on sales of bank assets were gains recorded in 2011 totaling $1.0 million on sales of former bank facilities in Cleburne and Southlake and a loss of $85 thousand on the write down of a parcel of land owned by a bank subsidiary.

These increases in noninterest income were offset by a $2.4 million decrease in service charges on deposit accounts, and net losses on sales of foreclosed assets of $1.8 million over amounts recorded in 2010. The decrease in service charges on deposit accounts was primarily due to a reduction in customer use of overdraft services and changes in overdraft regulations. Beginning in the third quarter of 2010, a new rule issued by the Federal Reserve prohibits financial institutions from charging consumers fees for paying overdrafts on automated teller machine and debit card transactions, unless a consumer consents, or opts in, to the overdraft service for those types of transactions. Consumers must be provided a notice that explains the financial institution’s overdraft services, including the fees associated with the service, and the consumer’s choices. We continue to monitor the impact of these new regulations and other related developments on our service charge revenue.

Table 3 — Noninterest Income (in thousands):

	2012			Increase (Decrease)			2011			Increase (Decrease)			2010
Trust fees	$	14,464		$	1,793		$	12,671		$	1,862		$	10,809
Service charges on deposit accounts		16,693			(996	)		17,689			(2,415	)		20,104
ATM, interchange and credit card fees		15,187			1,600			13,587			2,311			11,276
Real estate mortgage operations		5,094			1,151			3,943			131			3,812
Net gain on sale of available-for-sale securities		2,772			2,280			492			129			363
Net gain (loss) on sale of foreclosed assets		(350	)		965			(1,315	)		(1,772	)		457
Other:
Check printing fees		205			(4	)		209			(40	)		249
Safe deposit rental fees		453			—			453			5			448
Credit life and debt protection fees		229			(17	)		246			51			195
Brokerage commissions		178			(48	)		226			(47	)		273
Interest on loan recoveries		317			(281	)		598			159			439
Gain on sales of assets, net		207			(690	)		897			945			(48	)
Miscellaneous income		1,760			18			1,742			641			1,101
Total other		3,349			(1,022	)		4,371			1,714			2,657
Total Noninterest Income	$	57,209		$	5,771		$	51,438		$	1,960		$	49,478

Noninterest Expense. Total noninterest expense for 2012 was $109.0 million, an increase of $4.4 million, or 4.23%, as compared to 2011. Noninterest expense for 2011 amounted to $104.6 million, an increase of $6.4 million, or 6.5%, as compared to 2010. An important measure in determining whether a banking company effectively manages noninterest expenses is the efficiency ratio, which is calculated by dividing noninterest expense by the sum of net interest income on a tax-equivalent basis and noninterest income. Lower ratios indicate better efficiency since more income is generated with a lower noninterest expense total. Our efficiency ratio for 2012 was 48.14% compared to 48.37% for 2011, and 49.49% for 2010. The 2010 ratio includes the extraordinary item related to TXDOT.

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Salaries and employee benefits for 2012 totaled $58.3 million, an increase of $2.0 million, or 3.58%, as compared to 2011. The principal causes of this increase were additional employees to staff new branches and increases in salaries and related payroll taxes and pension expense. The increase in salaries and payroll taxes were largely the result of annual merit increases.

All other categories of noninterest expense for 2012 totaled $50.8 million, an increase of $2.4 million, or 4.99%, as compared to 2011. The increase in noninterest expense was largely the result of increases in ATM, interchange and credit card expenses of $530 thousand, net occupancy expense of $214 thousand, equipment expense of $990 thousand, software amortization and expense of $808 thousand and legal expense of $164 thousand. The increase in ATM, interchange and credit card expenses was largely the result of increased use of debit cards discussed above. The increases in net occupancy and equipment expenses were the result of the Company’s investment in several new branches. The increase in legal expense was primarily a result of costs associated with consolidating our bank charters. Partially offsetting these increases were a reduction in FDIC insurance premiums of $426 thousand, other real estate expense reduction of $532 thousand and reductions in several other categories of noninterest expense. The decrease in FDIC insurance premiums resulted from changes in the insurance assessment base and rates under the Dodd-Frank Act. The software expense increase is due primarily to costs related to combining the databases of our eleven charters into one. The decrease in other real estate expense is a result of less foreclosure activities and other real estate held.

Salaries and employee benefits for 2011 totaled $56.3 million, an increase of $3.6 million, or 6.9%, as compared to 2010. The principal causes of this increase were additional employees to staff new branches, and increases in salaries and related payroll taxes and profit sharing expense. The increase in salaries and payroll taxes were largely the result of annual merit increases. Also contributing to these increases were the salaries and employee benefits expenses included in our operations beginning November 1, 2010 related to our Huntsville acquisition.

All other categories of noninterest expense for 2011 totaled $48.4 million, an increase of $2.8 million, or 6.0%, as compared to 2010. The increase in noninterest expense was largely the result of increases in ATM, interchange and credit card expenses of $1.1 million, net occupancy expense of $420 thousand, equipment expense of $324 thousand, professional and service fees of $393 thousand and advertising expense of $522 thousand. The increase in ATM, interchange and credit card expenses was largely the result of increased use of debit cards discussed above. The increases in net occupancy and equipment expenses were partly the result of our Huntsville acquisition (discussed below). The increase in advertising expense resulted from our new marketing campaign. The increase in professional and service fees was largely the result of technology conversion and other expenses related to the Huntsville acquisition and volume-related increases in expenses related to internet and mobile banking products. Partially offsetting these increases were a reduction in FDIC insurance premiums of $1.4 million and reduction in several other categories of noninterest expense. The decrease in FDIC insurance premiums resulted from changes in the insurance assessment base and rates under the Dodd-Frank Act.

Included in noninterest expense in 2010 were certain costs related to the acquisition of Sam Houston Financial Corp. and its wholly owned subsidiary, First Financial Bank, Huntsville, Texas (formerly The First State Bank, Huntsville, Texas). These acquisition-related costs included $239 thousand in data processing expenses, $151 thousand in legal fees and $60 thousand in other related acquisition costs. The acquisition was consummated on November 1, 2010.

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Table 4 — Noninterest Expense (in thousands):

	2012		Increase (Decrease)			2011		Increase (Decrease)			2010
Salaries	$	44,492	$	1,825		$	42,667	$	3,119		$	39,548
Medical		3,430		(217	)		3,647		(149	)		3,796
Profit sharing		4,711		23			4,688		389			4,299
Pension		632		278			354		(129	)		483
401(k) match expense		1,383		78			1,305		85			1,220
Payroll taxes		3,287		119			3,168		260			2,908
Stock option expense		334		(93	)		427		40			387
Total salaries and employee benefits		58,269		2,013			56,256		3,615			52,641
Net occupancy expense		7,076		214			6,862		420			6,442
Equipment expense		8,790		990			7,800		324			7,476
FDIC insurance premiums		2,220		(426	)		2,646		(1,354	)		4,000
ATM, interchange and credit card expenses		5,448		530			4,918		1,139			3,779
Professional and service fees		3,044		(188	)		3,232		393			2,839
Printing, stationery and supplies		1,970		139			1,831		114			1,717
Amortization of intangible assets		149		(253	)		402		(207	)		609
Other:
Data processing fees		256		(241	)		497		(197	)		694
Postage		1,403		22			1,381		(53	)		1,434
Advertising		2,223		121			2,102		522			1,580
Correspondent bank service charges		856		52			804		37			767
Telephone		1,554		69			1,485		113			1,372
Public relations and business development		1,754		39			1,715		175			1,540
Directors’ fees		769		13			756		3			753
Audit and accounting fees		1,393		47			1,346		169			1,177
Legal fees		956		164			792		(29	)		821
Regulatory exam fees		1,071		122			949		77			872
Travel		775		80			695		27			668
Courier expense		766		108			658		74			584
Operational and other losses		1,116		52			1,064		28			1,036
Other real estate		513		(532	)		1,045		(72	)		1,117
Software amortization and expense		2,168		808			1,360		308			1,052
Other miscellaneous expense		4,510		482			4,028		742			3,286
Total other		22,083		1,406			20,677		1,924			18,753
Total Noninterest Expense	$	109,049	$	4,425		$	104,624	$	6,368		$	98,256

Income Taxes. Income tax expense was $25.1 million for 2012 as compared to $23.8 million for 2011 ($20.8 million including the extraordinary item) and $20.1 million for 2010. Our effective tax rates on pretax income were 25.3%, 25.8% (25.8% including the extraordinary item), and 25.6%, respectively, for the years 2012, 2011 and 2010. The effective tax rates differ from the statutory federal tax rate of 35.0% largely due to tax exempt interest income earned on certain investment securities and loans, the deductibility of dividends paid to our employee stock ownership plan and Texas state taxes.

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Balance Sheet Review

Loans. Our portfolio is comprised of loans made to businesses, professionals, individuals, and farm and ranch operations located in the primary trade areas served by our subsidiary bank. Real estate loans represent loans primarily for new home construction and owner-occupied commercial real estate. The structure of loans in the real estate mortgage classification generally provides repricing intervals to minimize the interest rate risk inherent in long-term fixed rate loans. As of December 31, 2012, total loans held for investment were $2.08 billion, an increase of $301.3 million, as compared to December 31, 2011. As compared to year-end 2011, real estate loans increased $185.4 million, commercial loans increased $55.5 million, agricultural loans increased $184 thousand and consumer loans increased $60.1 million. Loans averaged $1.91 billion during 2012, an increase of $194.6 million over the 2011 average balances.

Table 5 — Composition of Loans (in thousands):

	December 31,
	2012		2011		2010		2009		2008
Commercial	$	509,609	$	454,087	$	442,377	$	434,506	$	407,597
Agricultural		68,306		68,122		82,380		73,925		78,110
Real estate		1,226,823		1,041,396		962,366		826,123		833,888
Consumer		272,428		212,310		190,064		175,492		191,826
Total loans held for investment	$	2,077,166	$	1,775,915	$	1,677,187	$	1,510,046	$	1,511,421

Certain amounts above for December 31, 2011 have been reclassified from prior presentation to be consistent with December 31, 2012 presentation.

Our real estate loans represent approximately 59.1% of our loan portfolio and are comprised of (i) commercial real estate loans (28.5%), generally owner occupied, (ii) 1-4 family residence loans (43.3%), (iii) residential development and construction loans (5.4%), which includes our custom and speculation home construction loans, (iv) commercial development and construction loans of (4.1%) and (v) other (18.7%).

Loans held for sale, consisting of mortgage loans, totaled $11.5 million and $10.6 million at December 31, 2012 and 2011, respectively, in which the carrying amounts approximate market.

Table 6 — Maturity Distribution and Interest Sensitivity of Loans at December 31, 2012 (in thousands):

The following tables summarize maturity and repricing information for the commercial and agricultural and the real estate-construction portion of our loan portfolio as of December 31, 2012:

	One Year or less		After One Year Through Five Years		After Five Years		Total
Commercial and agricultural	$	293,821	$	165,883	$	118,211	$	577,915
Real estate - construction		39,279		29,950		45,722		114,951

	Maturities After One Year
Loans with fixed interest rates	$	285,247
Loans with floating or adjustable interest rates		74,518

Asset Quality. Loan portfolios of each of our subsidiaries are subject to periodic reviews by our centralized independent loan review group as well as periodic examinations by bank regulatory agencies. Loans are placed on nonaccrual status when, in the judgment of management, the collectibility of principal or interest under the original terms becomes doubtful. Nonaccrual, past due 90 days still accruing and restructured loans plus foreclosed assets, were $25.5 million at December 31, 2012, as compared to $29.5 million at December 31, 2011 and $26.0 million at

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December 31, 2010. As a percent of loans and foreclosed assets, these assets were 1.22% at December 31, 2012, as compared to 1.64% at December 31, 2011 and 1.53% at December 31, 2010. As a percent of total assets, these assets were 0.57% at December 31, 2012, as compared to 0.72% at December 31, 2011 and 0.69% at December 31, 2010. We believe the level of these assets to be manageable and are not aware of any material classified credit not properly disclosed as nonperforming at December 31, 2012. The continued higher levels of these nonperforming assets are the result of ongoing weakness in real estate markets and the slower Texas and overall general economy.

Table 7 — Nonaccrual, Past Due 90 Days Still Accruing and Restructured Loans and Foreclosed Assets (in thousands, except percentages):

	At December 31,
	2012			2011			2010			2009			2008
Nonaccrual loans	$	21,800		$	19,975		$	15,445		$	18,540		$	9,893
Loans still accruing and past due 90 days or more		97			96			2,196			15			36
Restructured loans		—			—			—			—			—
Nonperforming loans		21,897			20,071			17,641			18,555			9,929
Foreclosed assets		3,565			9,464			8,309			3,533			2,602
Total nonperforming assets	$	25,462		$	29,535		$	25,950		$	22,088		$	12,531
As a % of loans and foreclosed assets		1.22	%		1.64	%		1.53	%		1.46	%		0.80	%
As a % of total assets		0.57			0.72			0.69			0.67			0.39

We record interest payments received on nonaccrual loans as reductions of principal. Prior to the loans being placed on nonaccrual, we recognized interest income on the December 31, 2012 impaired loans above of approximately $287 thousand during the year ended December 31, 2012. If interest on these impaired loans had been recognized on a full accrual basis during the year ended December 31, 2012, such income would have approximated $1.67 million.

See Note 3 to the Consolidated Financial Statements beginning on page F-18 for more information on these assets.

Provision and Allowance for Loan Losses. The allowance for loan losses is the amount we determine as of a specific date to be appropriate to absorb probable losses on existing loans in which full collectability is unlikely based on our review and evaluation of the loan portfolio. For a discussion of our methodology, see our accounting policies in Note 1 to the Consolidated Financial Statements beginning on page F-7. The continued provision for loan losses in 2012 reflects the growth in loans and continued higher levels of nonperforming assets. As a percent of average loans, net loan charge-offs were 0.15% during 2012, 0.20% during 2011 and 0.35% during 2010. The allowance for loan losses as a percent of loans was 1.67% as of December 31, 2012, as compared to 1.92% as of December 31, 2011. Included in Tables 8 and 9 are further analysis of our allowance for loan losses.

Although we believe we use the best information available to make loan loss allowance determinations, future adjustments could be necessary if circumstances or economic conditions differ substantially from the assumptions used in making our initial determinations. The current downturn in the economy or lower employment could result in increased levels of nonaccrual, past due 90 days still accruing and restructured loans and foreclosed assets, charge-offs, increased loan loss provisions and reductions in income. Additionally, as an integral part of their examination process, bank regulatory agencies periodically review the adequacy of our allowance for loan losses. The banking agencies could require additions to the loan loss allowance based on their judgment of information available to them at the time of their examinations of our bank subsidiary.

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Table 8 — Loan Loss Experience and Allowance for Loan Losses (in thousands, except percentages):

	2012			2011			2010			2009			2008
Balance at January 1,	$	34,315		$	31,106		$	27,612		$	21,529		$	17,462
Charge-offs:
Commercial		499			640			2,598			1,010			1,910
Agricultural		53			95			113			178			27
Real estate		2,951			3,682			2,231			3,072			1,696
Consumer		852			907			1,505			1,950			1,082
Total charge-offs		4,355			5,324			6,447			6,210			4,715
Recoveries:
Commercial		281			610			234			183			283
Agricultural		54			33			56			7			59
Real estate		639			874			238			122			133
Consumer		421			390			451			562			350
Total recoveries		1,395			1,907			979			874			825
Net charge-offs		2,960			3,417			5,468			5,336			3,890
Provision for loan losses		3,484			6,626			8,962			11,419			7,957
Balance at December 31,	$	34,839		$	34,315		$	31,106		$	27,612		$	21,529
Loans at year-end	$	2,088,623		$	1,786,544		$	1,690,346		$	1,514,369		$	1,566,143
Average loans		1,909,890			1,715,266			1,543,537			1,494,876			1,537,027
Net charge-offs/average loans		0.15	%		0.20	%		0.35	%		0.36	%		0.25	%
Allowance for loan losses/year-end loans		1.67			1.92			1.84			1.82			1.37
Allowance for loan losses/nonaccrual, past due 90 days still accruing and restructured loans		159.10			171.00			176.33			148.81			216.83

The ratio of our allowance to nonaccrual, past due 90 days still accruing and restructured loans has generally trended downward since 2008, as the economic conditions began to worsen. Although the ratio has declined from prior years when net charge-offs and nonperforming asset levels were historically low, management believes the allowance for loan losses is adequate at December 31, 2012 in spite of these trends.

Table 9 — Allocation of Allowance for Loan Losses (in thousands):

	2012		2011		2010		2009		2008
	Allocation Amount		Allocation Amount		Allocation Amount		Allocation Amount		Allocation Amount
Commercial	$	7,343	$	9,664	$	7,745	$	8,840	$	7,290
Agricultural		1,541		1,482		2,299		1,489		1,397
Real estate		24,063		21,533		19,101		16,378		11,572
Consumer		1,892		1,636		1,961		905		1,270
Total	$	34,839	$	34,315	$	31,106	$	27,612	$	21,529

Percent of Loans in Each Category of Total Loans:

	2012			2011			2010			2009			2008
Commercial		24.53	%		26.37	%		26.17	%		28.73	%		26.02	%
Agricultural		3.29			4.02			4.87			4.84			4.99
Real estate		59.06			57.66			57.71			54.84			53.43
Consumer		13.12			11.95			11.25			11.59			15.56

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Included in our loan portfolio are certain other loans not included in Table 7 that are deemed to be potential problem loans. Potential problem loans are those loans that are currently performing, but for which known information about trends, uncertainties or possible credit problems of the borrowers causes management to have serious doubts as to the ability of such borrowers to comply with present repayment terms, possibly resulting in the transfer of such loans to nonperforming status. These potential problem loans totaled $3.6 million as of December 31, 2012.

Interest-Bearing Deposits in Banks. The Company had interest-bearing deposits in banks of $188.7 million, $165.8 million, and $243.8 million at December 31, 2012, 2011, and 2010, respectively. At December 31, 2012, our interest-bearing deposits in banks included $138.1 million maintained at the Federal Reserve Bank of Dallas, $49.0 million invested in FDIC-insured certificates of deposit and $1.6 million on deposit with the Federal Home Loan Bank of Dallas. The average balance of interest-bearing deposits in banks was $123.0 million, $176.6 million and $185.8 million in 2012, 2011 and 2010, respectively. The average yield on interest-bearing deposits in banks was 0.61%, 0.69% and 0.83% in 2012, 2011 and 2010, respectively. The Company increased its investment in interest-bearing deposits in banks in 2010 primarily by investing funds in (i) FDIC-insured certificate of deposits at unaffiliated banks, (ii) money market account at an unaffiliated bank and (iii) the Federal Reserve Bank of Dallas for better interest rates and less interest rate risk. The continued high level in our interest-bearing deposits in banks is the result of several factors including cash flows from maturing investment securities, growth in deposits and fluctuating deposits from large depository customers.

Available-for-Sale and Held-to-Maturity Securities. At December 31, 2012, securities with a fair value of $1.82 billion were classified as securities available-for-sale and securities with an amortized cost of $1.1 million were classified as securities held-to-maturity. As compared to December 31, 2011, the available-for-sale portfolio at December 31, 2012, reflected (1) a decrease of $9.3 million in U. S. Treasury securities; (2) a decrease of $37.9 million in obligations of U.S. government sponsored-enterprises and agencies; (3) an increase of $139.0 million in obligations of states and political subdivisions; (4) a decrease of $8.3 million in corporate bonds and other; and (5) a decrease of $106.0 million in mortgage-backed securities. As compared to December 31, 2010, the available-for-sale portfolio at December 31, 2011, reflected (1) a decrease of $169 thousand in U. S. Treasury securities; (2) a decrease of $17.9 million in obligations of U.S. government sponsored-enterprises and agencies; (3) an increase of $154.8 million in obligations of states and political subdivisions; (4) an increase of $70.6 million in corporate bonds and other; and (5) an increase of $96.9 million in mortgage-backed securities. Securities-available-for-sale included fair value adjustments of $91.8 million, $83.9 million and $40.2 million at December 31, 2012, 2011, and 2010, respectively. We did not hold any collateralized mortgage obligations or structured notes as of December 31, 2012 that we consider to be high risk. Our mortgage related securities are backed by GNMA, FNMA or FHLMC or are collateralized by securities backed by these agencies.

See Table 10 and Note 2 to the Consolidated Financial Statements for additional disclosures relating to the maturities and fair values of the investment portfolio at December 31, 2012 and 2011.

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Table 10 — Maturities and Yields of Available-for-Sale and Held-to-Maturity Securities Held at December 31, 2012 (in thousands, except percentages):

	Maturing
	One Year or Less					After One Year Through Five Years					After Five Years Through Ten Years					After Ten Years					Total
Available-for-Sale:	Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield
U. S. Treasury securities	$	6,090		1.78	%	$	—		—	%	$	—		—	%	$	—		—	%	$	6,090		1.78	%
Obligations of U.S. government sponsored-enterprises and agencies		81,950		2.80			141,530		1.38			—		—			—		—			223,480		1.90
Obligations of states and political subdivisions		61,776		5.61			271,509		4.47			496,447		5.67			13,958		7.45			843,690		5.31
Corporate bonds and other securities		8,789		4.09			101,722		2.60			12,680		4.81			—		—			123,191		2.93
Mortgage-backed securities		32,445		4.23			476,772		2.94			75,511		2.74			37,856		2.73			622,584		2.97
Total	$	191,050		3.98	%	$	991,533		3.10	%	$	584,638		5.27	%	$	51,814		4.00	%	$	1,819,035		3.92	%

	Maturing
	One Year or Less					After One Year Through Five Years					After Five Years Through Ten Years					After Ten Years					Total
Held-to-Maturity:	Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield			Amount		Yield
Obligations of states and political subdivisions	$	654		8.04	%	$	80		8.20	%	$	—		—	%	$	—		—	%	$	734		8.06	%
Mortgage-backed securities		17		2.33			231		3.13			79		1.77			—		—			327		2.76
Total	$	671		7.90	%	$	311		4.49	%	$	79		1.77	%	$	—		—	%	$	1,061		6.43	%

All yields are computed on a tax-equivalent basis assuming a marginal tax rate of 35%. Yields on available-for-sale securities are based on amortized cost. Maturities of mortgage-backed securities are based on contractual maturities and could differ due to prepayments of underlying mortgages. Maturities of other securities are reported at the earlier of maturity date or call date.

As of December 31, 2012, the investment portfolio had an overall tax equivalent yield of 3.87%, a weighted average life of 4.20 years and modified duration of 3.72 years.

Deposits. Deposits held by our subsidiary bank represent our primary source of funding. Total deposits were $3.63 billion as of December 31, 2012, as compared to $3.34 billion as of December 31, 2011 and $3.11 billion as of December 31, 2010. Table 11 provides a breakdown of average deposits and rates paid over the past three years and the remaining maturity of time deposits of $100,000 or more:

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Table 11 — Composition of Average Deposits and Remaining Maturity of Time Deposits of $100,000 or More (in thousands, except percentages):

	2012					2011					2010
	Average Balance		Average Rate			Average Balance		Average Rate			Average Balance		Average Rate
Noninterest-bearing deposits	$	1,132,862		—		$	973,588		—		$	811,464		—
Interest-bearing deposits
Interest-bearing checking		899,204		0.11	%		801,816		0.13	%		679,816		0.25	%
Savings and money market accounts		648,815		0.11			577,519		0.16			470,925		0.28
Time deposits under $100,000		299,902		0.42			352,865		0.70			348,464		1.25
Time deposits of $100,000 or more		407,318		0.47			433,550		0.78			447,915		1.26
Total interest-bearing deposits		2,255,239		0.22	%		2,165,750		0.36	%		1,947,120		0.67	%
Total average deposits	$	3,388,101				$	3,139,338				$	2,758,584

	As of December 31, 2012
Three months or less	$	125,150
Over three through six months		110,113
Over six through twelve months		94,000
Over twelve months		25,512
Total time deposits of $100,000 or more	$	354,775

Short-Term Borrowings. Included in short-term borrowings were federal funds purchased and securities sold under repurchase agreements of $253.7 million, $207.8 million and $178.4 million at December 31, 2012, 2011, and 2010 respectively. Securities sold under repurchase agreements are generally with significant customers of the Company that require short-term liquidity for their funds. The average balances of federal funds purchased and securities sold under repurchase agreements were $248.0 million, $196.2 million and $172.5 million in 2012, 2011 and 2010 respectively. The average rates paid on federal funds purchased and securities sold under repurchase agreements were 0.09%, 0.10% and 0.26% in 2012, 2011 and 2010, respectively. The weighted average rate on federal funds purchased and securities sold under repurchase agreements was 0.05%, 0.10% and 0.10% at December 31, 2012, 2011 and 2010, respectively. The highest amount of federal funds purchased and securities sold under repurchase agreements at any month end during 2012, 2011 and 2010 was $263.4 million, $215.8 million and $244.7 million, respectively.

Capital Resources

We evaluate capital resources by our ability to maintain adequate regulatory capital ratios to do business in the banking industry. Issues related to capital resources arise primarily when we are growing at an accelerated rate but not retaining a significant amount of our profits or when we experience significant asset quality deterioration.

Total shareholders’ equity was $557.0 million, or 12.37% of total assets, at December 31, 2012, as compared to $508.5 million, or 12.34% of total assets, at December 31, 2011. During 2012, total shareholders’ equity averaged $535.9 million, or 12.65% of average assets, as compared to $473.4 million, or 12.30% of average assets, during 2011 and $434.1 million, or 12.80% of average assets, during 2010.

Banking regulators measure capital adequacy by means of the risk-based capital ratios and leverage ratio. The risk-based capital rules provide for the weighting of assets and off-balance-sheet commitments and contingencies according to prescribed risk categories ranging from 0% to 100%. Regulatory capital is then divided by risk-weighted assets to determine the risk-adjusted capital ratios. The leverage ratio is computed by dividing shareholders’ equity less intangible assets by quarter-to-date average assets less intangible assets. Regulatory minimums for total risk-based, Tier 1 risked-based and leverage ratios are 8.00%, 4.00% and 3.00%, respectively. As of December 31, 2012, our total risk-based, Tier 1 risked-based and leverage capital ratios on a consolidated basis were 18.68%, 17.43% and 10.60%, respectively, as compared to total risk-based, Tier 1 risked-based and leverage capital ratios of 18.74%, 17.49% and 10.33% as of December 31, 2011. We believe by all measurements our capital ratios remain well above regulatory minimums.

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Interest Rate Risk. Interest rate risk results when the maturity or repricing intervals of interest-earning assets and interest-bearing liabilities are different. Our exposure to interest rate risk is managed primarily through our strategy of selecting the types and terms of interest-earning assets and interest-bearing liabilities that generate favorable earnings while limiting the potential negative effects of changes in market interest rates. We use no off-balance-sheet financial instruments to manage interest rate risk.

Our subsidiary bank has an asset liability management committee that monitors interest rate risk and compliance with investment policies; there is also a Holding Company-wide committee that monitors the consolidated Company’s interest rate risk and compliance with investment policies. The Company and its subsidiary bank utilize an earnings simulation model as the primary quantitative tool in measuring the amount of interest rate risk associated with changing market rates. The model quantifies the effects of various interest rate scenarios on projected net interest income and net income over the next 12 months. The model measures the impact on net interest income relative to a base case scenario of hypothetical fluctuations in interest rates over the next 12 months. These simulations incorporate assumptions regarding balance sheet growth and mix, pricing and the repricing and maturity characteristics of the existing and projected balance sheet.

As of December 31, 2012, the model simulations projected that 100 and 200 basis point increases in interest rates would result in positive variances in net interest income of 1.90% and 3.71%, respectively, relative to the base case over the next 12 months, while decreases in interest rates of 100 basis points would result in a negative variance in a net interest income of 5.60% relative to the base case over the next 12 months. The likelihood of a decrease in interest rates beyond 50 basis points as of December 31, 2012 is considered remote given current interest rate levels. Our model simulations also indicated that if interest rates remain unchanged, our net interest income for 2013 would decrease by 3.56% compared to 2012. Such a decrease would be largely attributable reinvesting proceeds from investment security maturities and pay downs at current market interest rates. These are good faith estimates and assume that the composition of our interest sensitive assets and liabilities existing at each year-end will remain constant over the relevant twelve month measurement period and that changes in market interest rates are instantaneous and sustained across the yield curve regardless of duration of pricing characteristics of specific assets or liabilities. Also, this analysis does not contemplate any actions that we might undertake in response to changes in market interest rates. We believe these estimates are not necessarily indicative of what actually could occur in the event of immediate interest rate increases or decreases of this magnitude. As interest-bearing assets and liabilities reprice in different time frames and proportions to market interest rate movements, various assumptions must be made based on historical relationships of these variables in reaching any conclusion. Since these correlations are based on competitive and market conditions, we anticipate that our future results will likely be different from the foregoing estimates, and such differences could be material.

Should we be unable to maintain a reasonable balance of maturities and repricing of our interest-earning assets and our interest-bearing liabilities, we could be required to dispose of our assets in an unfavorable manner or pay a higher than market rate to fund our activities. Our asset liability committees oversee and monitor this risk.

Liquidity

Liquidity is our ability to meet cash demands as they arise. Such needs can develop from loan demand, deposit withdrawals or acquisition opportunities. Potential obligations resulting from the issuance of standby letters of credit and commitments to fund future borrowings to our loan customers are other factors affecting our liquidity needs. Many of these obligations and commitments are expected to expire without being drawn upon; therefore the total commitment amounts do not necessarily represent future cash requirements affecting our liquidity position. The potential need for liquidity arising from these types of financial instruments is represented by the contractual notional amount of the instrument, as detailed in Tables 12 and 13. Asset liquidity is provided by cash and assets which are readily marketable or which will mature in the near future. Liquid assets include cash, federal funds sold, and short-term investments in time deposits in banks. Liquidity is also provided by access to funding sources, which include core depositors and correspondent banks that maintain accounts with and sell federal funds to our subsidiary bank. Other sources of funds include our ability to borrow from short-term sources, such as purchasing federal funds from correspondents and sales of securities under agreements to repurchase, which amounted to $253.7 million at December 31, 2012, and an unfunded $25.0 million line of credit established with The Frost National Bank, a nonaffiliated bank, which matures on June 30, 2013. First Financial Bank, N. A., Abilene also has federal funds purchased lines of credit with two non-affiliated banks totaling $80.0 million. Our subsidiary bank also has

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available lines of credit with the Federal Home Loan Bank of Dallas totaling $223.7 million secured by portions of its loan portfolios and certain investment securities. At December 31, 2012, $87.7 million in letters of credit issued by the Federal Home Loan Bank of Dallas were outstanding under these lines of credit. These letters of credit were pledged as collateral for public funds held by our subsidiary bank.

The Company renewed its loan agreement, effective June 30, 2011, with The Frost National Bank. Under the loan agreement, as renewed and amended, the Company is permitted to draw up to $25.0 million on a revolving line of credit. Prior to June 30, 2013, interest is paid quarterly at the Wall Street Journal Prime Rate and the line of credit matures June 30, 2013. If a balance exists at June 30, 2013, the principal balance converts to a term facility payable quarterly over five years and interest is paid quarterly at the election of the Company at the Wall Street Journal Prime Rate plus 50 basis points or LIBOR plus 250 basis points. The line of credit is unsecured. Among other provisions in the credit agreement, the Company must satisfy certain financial covenants during the term of the loan agreement, including, without limitation, covenants that require the Company to maintain certain capital, tangible net worth, loan loss reserve, non-performing asset and cash flow coverage ratio. In addition, the credit agreement contains certain operational covenants, which among others, restricts the payment of dividends above 55% of consolidated net income, limits the incurrence of debt (excluding any amounts acquired in an acquisition) and prohibits the disposal of assets except in the ordinary course of business. Since 1995, we have historically declared dividends as a percentage of consolidated net income in a range of 37% (low) in 1995 to 53% (high) in 2003 and 2006. Management believes the Company was in compliance with the financial and operational covenants at December 31, 2012. There was no outstanding balance under the line of credit as of December 31, 2012 or 2011.

In addition, we anticipate that any future acquisition of financial institutions, expansion of branch locations or offering of new products could also place a demand on our cash resources. Available cash and cash equivalents at our parent company, which totaled $72.0 million at December 31, 2012, available dividends from subsidiaries which totaled $60.0 million at December 31, 2012, utilization of available lines of credit, and future debt or equity offerings are expected to be the source of funding for these potential acquisitions or expansions. Existing cash resources at our subsidiary bank may also be used as a source of funding for these potential acquisitions or expansions.

Given the strong core deposit base and relatively low loan to deposit ratios maintained at our subsidiary bank, we consider our current liquidity position to be adequate to meet our short- and long-term liquidity needs.

Table 12 — Contractual Obligations as of December 31, 2012 (in thousands):

	Payment Due by Period
	Total Amounts		Less than 1 year		2 - 3 years		4 - 5 years		Over 5 years
Deposits with stated maturity dates	$	637,040	$	581,053	$	46,135	$	9,752	$	100
Pension obligation		15,178		1,309		2,796		2,859		8,214
Operating leases		2,726		821		1,132		745		28
Outsourcing service contracts		971		971		—		—		—
Total Contractual Obligations	$	655,915	$	584,154	$	50,063	$	13,356	$	8,342

Amounts above for deposits do not include related accrued interest.

Off-Balance Sheet Arrangements. We are a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of our customers. These financial instruments include unfunded lines of credit, commitments to extend credit and federal funds sold and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in our consolidated balance sheets.

Our exposure to credit loss in the event of nonperformance by the counterparty to the financial instrument for unfunded lines of credit, commitments to extend credit and standby letters of credit is represented by the contractual notional amount of these instruments. We generally use the same credit policies in making commitments and conditional obligations as we do for on-balance-sheet instruments.

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Unfunded lines of credit and commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. We evaluate each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, as we deem necessary upon extension of credit, is based on our credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, property, plant, and equipment and income-producing commercial properties.

Standby letters of credit are conditional commitments we issue to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The average collateral value held on letters of credit usually exceeds the contract amount.

Table 13 — Commitments as of December 31, 2012 (in thousands):

	Total Notional Amounts Committed		Less than 1 year		2 - 3 years		4 - 5 years		Over 5 years
Unfunded lines of credit	$	335,654	$	323,541	$	4,136	$	762	$	7,215
Unfunded commitments to extend credit		75,604		39,796		1,124		4,613		30,071
Standby letters of credit		19,985		15,684		4,267		34		—
Total Commercial Commitments	$	431,243	$	379,021	$	9,527	$	5,409	$	37,286

We believe we have no other off-balance sheet arrangements or transactions with unconsolidated, special purpose entities that would expose us to liability that is not reflected on the face of the financial statements.

Parent Company Funding. Our ability to fund various operating expenses, dividends, and cash acquisitions is generally dependent on our own earnings (without giving effect to our subsidiaries), cash reserves and funds derived from our subsidiary bank. These funds historically have been produced by intercompany dividends and management fees that are limited to reimbursement of actual expenses. We anticipate that our recurring cash sources will continue to include dividends and management fees from our subsidiary bank. At December 31, 2012, approximately $60.0 million was available for the payment of intercompany dividends by the subsidiaries without the prior approval of regulatory agencies. Our subsidiaries paid aggregate dividends of $58.4 million in 2012 and $47.4 million in 2011.

Dividends. Our long-term dividend policy is to pay cash dividends to our shareholders of approximately 40% of annual net earnings while maintaining adequate capital to support growth. We are also restricted by a loan covenant within our line of credit agreement with The Frost National Bank to dividend no greater than 55% of net income, as defined in such loan agreement. The cash dividend payout ratios have amounted to 42.0%, 43.6% and 47.6% of net earnings, respectively, in 2012, 2011 and 2010. Given our current capital position and projected earnings and asset growth rates, we do not anticipate any significant change in our current dividend policy.

Our bank subsidiary, which is a member of the Federal Reserve System and the national banking association are required by federal law to obtain the prior approval of the Federal Reserve Board and the OCC, respectively, to declare and pay dividends if the total of all dividends declared in any calendar year would exceed the total of (1) such bank’s net profits (as defined and interpreted by regulation) for that year plus (2) its retained net profits (as defined and interpreted by regulation) for the preceding two calendar years, less any required transfers to surplus.

To pay dividends, we and our subsidiary bank must maintain adequate capital above regulatory guidelines. In addition, if the applicable regulatory authority believes that a bank under its jurisdiction is engaged in or is about to engage in an unsafe or unsound practice (which, depending on the financial condition of the bank, could include the payment of dividends), the authority may require, after notice and hearing, that such bank cease and desist from the unsafe practice. The Federal Reserve Board, the FDIC and the OCC have each indicated that paying dividends that deplete a bank’s capital base to an inadequate level would be an unsafe and unsound banking practice. The Federal Reserve Board, the OCC and the FDIC have issued policy statements that recommend that bank holding companies and insured banks should generally only pay dividends out of current operating earnings.

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ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Management considers interest rate risk to be a significant market risk for the Company. See “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations – Capital Resources – Interest Rate Risk” for disclosure regarding this market risk.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Our consolidated financial statements begin on page F-1.

Quarterly Results of Operations (in thousands, except per share and common stock data):

The following tables set forth certain unaudited historical quarterly financial data for each of the eight consecutive quarters in fiscal 2012 and 2011. This information is derived from unaudited consolidated financial statements that include, in our opinion, all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation when read in conjunction with our consolidated financial statements and notes thereto included elsewhere in this Form 10-K.

	2012
	4th		3rd		2nd		1st
	(dollars in thousands, except per share amounts)
Summary Income Statement Information:
Interest income	$	39,801	$	40,287	$	39,911	$	39,797
Interest expense		1,049		1,168		1,355		1,540
Net interest income		38,752		39,119		38,556		38,257
Provision for loan losses		642		787		759		1,296
Net interest income after provision for loan losses		38,110		38,332		37,797		36,961
Noninterest income		14,383		14,020		13,082		12,952
Net gain on securities transactions		565		1,479		382		346
Noninterest expense		28,633		27,203		26,745		26,468
Earnings before income taxes		24,425		26,628		24,516		23,791
Income tax expense		6,107		6,828		6,165		6,035
Net earnings	$	18,318	$	19,800	$	18,351	$	17,756
Per Share Data:
Earnings per share, basic	$	0.58	$	0.63	$	0.58	$	0.56
Earnings per share, assuming dilution		0.58		0.63		0.58		0.56
Cash dividends declared		0.25		0.25		0.25		0.24
Book value at period-end		17.68		17.46		16.97		16.42
Common stock sales price:
High	$	41.45	$	37.00	$	36.18	$	37.25
Low		34.66		33.49		30.50		33.07
Close		39.01		36.03		34.56		35.21

44

	2011
	4th		3rd		2nd		1st
Summary Income Statement Information:
Interest income	$	39,888	$	40,164	$	40,241	$	39,727
Interest expense		1,704		1,854		2,065		2,400
Net interest income		38,184		38,310		38,176		37,327
Provision for loan losses		1,221		1,354		1,924		2,127
Net interest income after provision for loan losses		36,963		36,956		36,252		35,200
Noninterest income		12,628		13,844		11,852		12,623
Net gain on securities transactions		164		67		42		219
Noninterest expense		26,257		26,320		25,888		26,161
Earnings before income taxes		23,498		24,547		22,258		21,881
Income tax expense		6,032		6,460		5,738		5,586
Net earnings	$	17,466	$	18,087	$	16,520	$	16,295
Per Share Data:
Earnings per share, basic	$	0.56	$	0.58	$	0.53	$	0.52
Earnings per share, assuming dilution		0.55		0.57		0.52		0.52
Cash dividends declared		0.24		0.24		0.24		0.23
Book value at period-end		16.16		15.87		15.19		14.51
Common stock sales price:
High	$	34.19	$	34.90	$	37.16	$	35.55
Low		25.01		24.56		32.16		32.00
Close		33.43		26.16		34.45		34.25

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

As of December 31, 2012, we carried out an evaluation, under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Securities Exchange Act Rule 15d-15. Our management, including the principal executive officer and principal financial officer, does not expect that our disclosure controls and procedures will prevent all errors and all fraud.

A control system, no matter how well conceived and operated, can provide only reasonable not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected. Our principal executive officer and principal financial officer have concluded, based on our evaluation of our disclosure controls and procedures, that our disclosure controls and procedures under Rule 13a-14(c) and Rule 15d-14(c) of the Securities Exchange Act of 1934 are effective at the reasonable assurance level as of December 31, 2012.

45

Subsequent to our evaluation, there were no significant changes in internal controls over financial reporting or other factors that have materially affected, or is reasonably likely to materially affect, these internal controls.

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

The management of First Financial Bankshares, Inc. and subsidiaries is responsible for establishing and maintaining adequate internal control over financial reporting. First Financial Bankshares, Inc. and subsidiaries’ internal control system was designed to provide reasonable assurance to the Company’s management and board of directors regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.

First Financial Bankshares, Inc. and subsidiaries’ management assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2012. In making this assessment, it used the criteria for effective internal control over financial reporting set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control – Integrated Framework. Based on our assessment we believe that, as of December 31, 2012, the Company’s internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f), is effective based on those criteria.

First Financial Bankshares, Inc. and subsidiaries’ independent auditors have issued an audit report, dated February 22, 2013, on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2012.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of

First Financial Bankshares, Inc.

We have audited First Financial Bankshares, Inc. and subsidiaries’ internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). First Financial Bankshares, Inc. and subsidiaries’ 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, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and 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

46

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, First Financial Bankshares, Inc. and subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2012, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the 2012 consolidated financial statements of First Financial Bankshares, Inc. and subsidiaries and our report dated February 22, 2013 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Dallas, Texas

February 22, 2013

ITEM 9B. OTHER INFORMATION

None.

47

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by Item 10 is hereby incorporated by reference from our proxy statement for our 2013 annual meeting of shareholders.

ITEM 11. EXECUTIVE COMPENSATION

The information required by Item 11 is hereby incorporated by reference from our proxy statement for our 2013 annual meeting of shareholders.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required by Item 12 related to security ownership of certain beneficial owners and management is hereby incorporated by reference from our proxy statement for our 2013 annual meeting of shareholders. The following chart gives aggregate information under our equity compensation plans as of December 31, 2012.

	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 Plans (Excluding Securities Reflected in Far Left Column)
Equity compensation plans approved by security holders		420,093	$	29.62		1,500,000
Equity compensation plans not approved by security holders		—		—		—
Total		420,093	$	29.62		1,500,000

The remainder of the information required by Item 12 is incorporated by reference from our proxy statement for our 2013 annual meeting of shareholders.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by Item 13 is hereby incorporated by reference from our proxy statement for our 2013 annual meeting of shareholders.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by Item 14 is hereby incorporated by reference from our proxy statement for our 2013 annual meeting of shareholders.

48

PART IV

ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a) The following documents are filed as part of this report:

(1) Financial Statements -

Report of Independent Registered Public Accounting Firm

Consolidated Balance Sheets as of December 31, 2012 and 2011

Consolidated Statements of Earnings for the years ended December 31, 2012, 2011 and 2010

Consolidated Statements of Comprehensive Earnings for the years ended December 31, 2012, 2011 and 2010

Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2012, 2011 and 2010

Consolidated Statements of Cash Flows for the years ended December 31, 2012, 2011 and 2010

Notes to the Consolidated Financial Statements

(2) Financial Statement Schedules -

These schedules have been omitted because they are not required, are not applicable or have been included in our consolidated financial statements.

(3) Exhibits -

The information required by this Item 15(a)(3) is set forth in the Exhibit Index immediately following our signature pages. The exhibits listed herein will be furnished upon written request to J. Bruce Hildebrand, Executive Vice President, First Financial Bankshares, Inc., 400 Pine Street, Abilene, Texas 79601, and payment of a reasonable fee that will be limited to our reasonable expense in furnishing such exhibits.

49

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.

	FIRST FINANCIAL BANKSHARES, INC.
Date: February 22, 2013	By:	/s/ F. SCOTT DUESER
		F. SCOTT DUESER
		Chairman of the Board, Director, President and Chief Executive Officer
		(Principal Executive Officer)

The undersigned directors and officers of First Financial Bankshares, Inc. hereby constitute and appoint J. Bruce Hildebrand, with full power to act and with full power of substitution and resubstitution, our true and lawful attorney-in-fact with full power to execute in our name and behalf in the capacities indicated below any and all amendments to this report and to file the same, with all exhibits thereto and other documents in connection therewith with the Securities and Exchange Commission and hereby ratify and confirm all that such attorney-in-fact or his substitute shall lawfully do or cause to be done by virtue hereof.

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.

Name	Title	Date
/s/ F. SCOTT DUESER	Chairman of the Board, Director, President, and Chief Executive Officer (Principal Executive Officer)	February 22, 2013
F. Scott Dueser
/s/ J. BRUCE HILDEBRAND	Executive Vice President and Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)	February 22, 2013
J. Bruce Hildebrand
/s/ STEVEN L. BEAL	Director	February 22, 2013
Steven L. Beal
/s/ TUCKER S. BRIDWELL	Director	February 22, 2013
Tucker S. Bridwell
/s/ JOSEPH E. CANON	Director	February 22, 2013
Joseph E. Canon
/s/ DAVID COPELAND	Director	February 22, 2013
David Copeland

50

Name	Title	Date
/s/ MURRAY EDWARDS	Director	February 22, 2013
Murray Edwards
/s/ RONALD GIDDIENS	Director	February 22, 2013
Ronald Giddiens
/s/ KADE L. MATTHEWS	Director	February 22, 2013
Kade L. Matthews
/s/ JOHNNY TROTTER	Director	February 22, 2013
Johnny Trotter

51

Exhibits Index

The following exhibits are filed as part of this report:

3.1	—	Amended and Restated Certificate of Formation (incorporated by reference from Exhibit 3.1 of the Registrant’s Form 8-K filed April 25, 2012).
3.2	—	Amended and Restated Bylaws of the Registrant (incorporated by reference from Exhibit 3.2 of the Registrant’s Form 8-K filed January 24, 2012).
4.1	—	Specimen certificate of First Financial Common Stock (incorporated by reference from Exhibit 3 of the Registrant’s Amendment No. 1 to Form 8-A filed on Form 8-A/A No. 1 on January 7, 1994).
10.1	—	Executive Recognition Agreement (incorporated by reference from Exhibit 10.1 of the Registrant’s Form 8-K Report filed June 29, 2012).
10.2	—	2002 Incentive Stock Option Plan (incorporated by reference from Exhibit 10.3 of the Registrant’s Form 10-Q filed May 4, 2010).
10.3	—	2012 Incentive Stock Option Plan (incorporated by reference from Appendix A of the Registrant’s Definitive Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 filed March 1, 2012).
10.4	—	Loan agreement dated December 31, 2004, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.4 of the Registrant’s Form 10-Q filed May 4, 2010).
10.5	—	First Amendment to Loan Agreement, dated December 28, 2005, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.5 of the Registrant’s Form 10-Q Quarterly Report filed August 2, 2011).
10.6	—	Second Amendment to Loan Agreement, dated December 31, 2006, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.6 of the Registrant’s Form 10-Q Quarterly Report filed October 31, 2012).
10.7	—	Third Amendment to Loan Agreement, dated December 31, 2007, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.4 of the Registrant’s Form 8-K filed January 2, 2008).
10.8	—	Fourth Amendment to Loan Agreement, dated July 24, 2008, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.10 of the Registrant’s Form 10-Q Quarterly Report filed July 25, 2008).
10.9	—	Fifth Amendment to Loan Agreement, dated December 19, 2008, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.6 of the Registrant’s Form 8-K filed December 23, 2008).
10.10	—	Sixth Amendment to Loan Agreement, dated June 16, 2009, signed June 30, 2009, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.7 of the Registrant’s Form 8-K filed on July 1, 2009).
10.11	—	Seventh Amendment to Loan Agreement, dated December 30, 2009, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10.8 of the Registrant’s Form 8-K filed December 31, 2009).
10.12	—	Eighth Amendment to Loan Agreement, dated June 30, 2011, between First Financial Bankshares, Inc. and The Frost National Bank (incorporated by reference from Exhibit 10-9 of the Registrant’s Form 8-K filed June 30, 2011).
21.1	—	Subsidiaries of the Registrant.*
23.1	—	Consent of Ernst & Young LLP.*
24.1	—	Power of Attorney (included on signature page of this Form 10-K).*
31.1	—	Rule 13a-14(a) / 15(d)-14(a) Certification of Chief Executive Officer of First Financial Bankshares, Inc.*
31.2	—	Rule 13a-14(a) / 15(d)-14(a) Certification of Chief Financial Officer of First Financial Bankshares, Inc.*
32.1	—	Section 1350 Certification of Chief Executive Officer of First Financial Bankshares, Inc.*
32.2	—	Section 1350 Certification of Chief Financial Officer of First Financial Bankshares, Inc.*

52

101.INS	—	XBRL Instance Document.*
101.SCH	—	XBRL Taxonomy Extension Schema Document.*
101.CAL	—	XBRL Taxonomy Extension Calculation Linkbase Document.*
101.DEF	—	XBRL Taxonomy Extension Definition Linkbase Document.*
101.LAB	—	XBRL Taxonomy Extension Label Linkbase Document.*
101.PRE	—	XBRL Taxonomy Extension Presentation Linkbase Document.*

* Filed herewith

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of

First Financial Bankshares, Inc.

We have audited the accompanying consolidated balance sheets of First Financial Bankshares, Inc. (a Texas corporation) and subsidiaries as of December 31, 2012 and 2011, and the related consolidated statements of earnings and comprehensive earnings, shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 2012. These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these 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 financial statements referred to above present fairly, in all material respects, the consolidated financial position of First Financial Bankshares, Inc. and subsidiaries at December 31, 2012 and 2011, and the consolidated results of their operations and their cash flows for each of the three years in the period ended December 31, 2012, 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), First Financial Bankshares, Inc.’s internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 22, 2013, expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Dallas, Texas

February 22, 2013

F-1

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Consolidated Balance Sheets

December 31, 2012 and 2011

(Dollars in thousands, except share and per share amounts)

	2012			2011
ASSETS
CASH AND DUE FROM BANKS	$	207,018		$	146,239
FEDERAL FUNDS SOLD		14,045			—
INTEREST-BEARING DEPOSITS IN BANKS		139,676			104,597
Total cash and cash equivalents		360,739			250,836
INTEREST-BEARING TIME DEPOSITS IN BANKS		49,005			61,175
SECURITIES AVAILABLE-FOR-SALE, at fair value		1,819,035			1,841,389
SECURITIES HELD-TO-MATURITY (fair value of $1,080 in 2012 and $3,655 in 2011)		1,061			3,609
LOANS:
Held for investment		2,077,166			1,775,915
Less - allowance for loan losses		(34,839	)		(34,315	)
Net loans held for investment		2,042,327			1,741,600
Held for sale		11,457			10,629
Net loans		2,053,784			1,752,229
BANK PREMISES AND EQUIPMENT, net		84,122			76,483
INTANGIBLE ASSETS		71,973			72,122
OTHER ASSETS		62,293			62,688
Total assets	$	4,502,012		$	4,120,531
LIABILITIES AND SHAREHOLDERS’ EQUITY
NONINTEREST-BEARING DEPOSITS	$	1,311,708		$	1,101,576
INTEREST-BEARING DEPOSITS		2,320,876			2,233,222
Total deposits		3,632,584			3,334,798
DIVIDENDS PAYABLE		—			7,550
SHORT-TERM BORROWINGS		259,697			207,756
OTHER LIABILITIES		52,768			61,890
Total liabilities		3,945,049			3,611,994
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
Common stock, $0.01 par value; authorized 80,000,000 shares; 31,496,881 and 31,459,635 issued at December 31, 2012 and 2011, respectively		315			314
Capital surplus		277,412			276,127
Retained earnings		227,927			184,871
Treasury stock (shares at cost: 266,845 and 258,235 at December 31, 2012 and 2011, respectively)		(5,007	)		(4,597	)
Deferred Compensation		5,007			4,597
Accumulated other comprehensive earnings		51,309			47,225
Total shareholders’ equity		556,963			508,537
Total liabilities and shareholders’ equity	$	4,502,012		$	4,120,531

The accompanying notes are an integral part of these consolidated financial statements.

F-2

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Consolidated Statements of Earnings

Years Ended December 31, 2012, 2011 and 2010

(Dollars in thousands, except per share amounts)

	2012			2011			2010
INTEREST INCOME:
Interest and fees on loans	$	102,172		$	98,767		$	92,715
Interest on investment securities:
Taxable		31,318			37,721			36,227
Exempt from federal income tax		25,552			22,312			19,216
Interest on federal funds sold and interest-bearing deposits in banks		754			1,221			1,541
Total interest income		159,796			160,021			149,699
INTEREST EXPENSE:
Interest on deposits		4,877			7,822			13,071
Other		235			202			457
Total interest expense		5,112			8,024			13,528
Net interest income		154,684			151,997			136,171
PROVISION FOR LOAN LOSSES		3,484			6,626			8,962
Net interest income after provision for loan losses		151,200			145,371			127,209
NONINTEREST INCOME:
Trust fees		14,464			12,671			10,809
Service charges on deposit accounts		16,693			17,689			20,104
ATM, interchange and credit card fees		15,187			13,587			11,276
Real estate mortgage operations		5,094			3,943			3,812
Net gain on sale of available-for-sale securities		2,772			492			363
Net gain (loss) on sale of foreclosed assets		(350	)		(1,315	)		457
Other		3,349			4,371			2,657
Total noninterest income		57,209			51,438			49,478
NONINTEREST EXPENSE:
Salaries and employee benefits		58,269			56,256			52,641
Net occupancy expense		7,076			6,862			6,442
Equipment expense		8,790			7,800			7,476
FDIC insurance premiums		2,220			2,646			4,000
ATM, interchange and credit card expenses		5,448			4,918			3,779
Professional and service fees		3,044			3,232			2,839
Printing, stationery and supplies		1,970			1,831			1,717
Amortization of intangible assets		149			402			609
Other expenses		22,083			20,677			18,753
Total noninterest expense		109,049			104,624			98,256
EARNINGS BEFORE INCOME TAXES AND EXTRAORDINARY ITEM		99,360			92,185			78,431
INCOME TAX EXPENSE		25,135			23,816			20,068
NET EARNINGS BEFORE EXTRAORDINARY ITEM		74,225			68,369			58,363
EXTRAORDINARY ITEM - EXPROPRIATION OF LAND, NET OF INCOME TAXES OF $697		—			—			1,296
NET EARNINGS	$	74,225		$	68,369		$	59,659
NET EARNINGS PER SHARE, BASIC BEFORE EXTRAORDINARY ITEM	$	2.36		$	2.17		$	1.87
NET EARNINGS PER SHARE, ASSUMING DILUTION BEFORE EXTRAORDINARY ITEM	$	2.36		$	2.17		$	1.87
NET EARNINGS PER SHARE, BASIC	$	2.36		$	2.17		$	1.91
NET EARNINGS PER SHARE, ASSUMING DILUTION	$	2.36		$	2.17		$	1.91

The accompanying notes are an integral part of these consolidated financial statements.

F-3

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Consolidated Statements of Comprehensive Earnings

Years Ended December 31, 2012, 2011 and 2010

(Dollars in thousands)

	2012			2011			2010
NET EARNINGS	$	74,225		$	68,369		$	59,659
OTHER ITEMS OF COMPREHENSIVE EARNINGS:
Change in unrealized gain (loss) on investment securities available-for-sale, before income tax		10,619			44,279			(15,332	)
Reclassification adjustment for realized gains on investment securities included in net earnings, before income tax		(2,772	)		(492	)		(363	)
Minimum liability pension adjustment, before income tax		(1,564	)		(2,599	)		(650	)
Total other items of comprehensive earnings		6,283			41,188			(16,345	)
Income tax benefit (expense) related to:
Investment securities		(2,746	)		(15,325	)		5,493
Minimum liability pension adjustment		547			909			227
		(2,199	)		(14,416	)		5,720
COMPREHENSIVE EARNINGS	$	78,309		$	95,141		$	49,034

The accompanying notes are an integral part of these consolidated financial statements.

F-4

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Consolidated Statements of Shareholders’ Equity

Years Ended December 31, 2012, 2011 and 2010

(Dollars in thousands, except per share amounts)

	Common Stock				Capital Surplus		Retained Earnings			Treasury Stock						Deferred Compensation		Accumulated Other Comprehensive Earnings (Losses)			Total Shareholders’ Equity
	Shares		Amount							Shares			Amounts
BALANCE, December 31, 2009		20,826,431	$	208	$	269,294	$	115,123			(162,836	)	$	(3,833	)	$	3,833	$	31,077		$	415,702
Net earnings		—		—		—		59,659			—			—			—		—			59,659
Stock issued in acquisition of Sam Houston Financial Corp.		85,306		1		4,031		—			—			—			—		—			4,032
Stock option exercises		30,404		—		789		—			—			—			—		—			789
Cash dividends declared, $0.91 per share		—		—		—		(28,385	)		—			—			—		—			(28,385	)
Minimum liability pension adjustment, net of related income taxes		—		—		—		—			—			—			—		(423	)		(423	)
Change in unrealized gain on investment insecurities available-for-sale, net of related income taxes		—		—		—		—			—			—			—		(10,201	)		(10,201	)
Additional tax benefit related to directors’ deferred compensation plan		—		—		128		—			—			—			—		—			128
Shares purchased in connection with directors’ deferred compensation plan, net		—		—		—		—			(3,493	)		(374	)		374		—			—
Stock option expense		—		—		387		—			—			—			—		—			387
BALANCE, December 31, 2010		20,942,141		209		274,629		146,397			(166,329	)		(4,207	)		4,207		20,453			441,688
Net earnings		—		—		—		68,369														68,369
Stock option exercises		36,317		—		950		—			—			—			—		—			950
Cash dividends declared, $0.95 per share		—		—		—		(29,790	)		—			—			—		—			(29,790	)
Minimum liability pension adjustment, net of related income taxes		—		—		—		—			—			—			—		(1,690	)		(1,690	)
Change in unrealized gain on investment insecurities available-for-sale, net of related income taxes		—		—		—		—			—			—			—		28,462			28,462
Additional tax benefit related to directors’ deferred compensation plan		—		—		121		—			—			—			—		—			121
Shares purchased in connection with directors’ deferred compensation plan, net		—		—		—		—			(8,760	)		(390	)		390		—			—
Stock option expense		—		—		427		—			—			—			—		—			427
Three-for-two stock split in the form of a 50% stock dividend		10,481,177		105		—		(105	)		(83,146	)		—			—		—			—
BALANCE, December 31, 2011		31,459,635		314		276,127		184,871			(258,235	)		(4,597	)		4,597		47,225			508,537
Net earnings		—		—		—		74,225			—			—			—		—			74,225
Stock option exercises		37,246		1		824		—			—			—			—		—			825
Cash dividends declared, $0.99 per share		—		—		—		(31,169	)		—			—			—		—			(31,169	)
Minimum liability pension adjustment, net of related income taxes		—		—		—		—			—			—			—		(1,017	)		(1,017	)
Change in unrealized gain on investment insecurities available-for-sale, net of related income taxes		—		—		—		—			—			—			—		5,101			5,101
Additional tax benefit related to directors’ deferred compensation plan		—		—		127		—			—			—			—		—			127
Shares purchased in connection with directors’ deferred compensation plan, net		—		—		—		—			(8,610	)		(410	)		410		—			—
Stock option expense		—		—		334		—			—			—			—		—			334
BALANCE, December 31, 2012		31,496,881	$	315	$	277,412	$	227,927			(266,845	)	$	(5,007	)	$	5,007	$	51,309		$	556,963

The accompanying notes are an integral part of these consolidated financial statements.

F-5

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

Years Ended December 31, 2012, 2011 and 2010

(Dollars in thousands)

	2012			2011			2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$	74,225		$	68,369		$	59,659
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization		7,920			7,352			7,102
Provision for loan losses		3,484			6,626			8,962
Securities premium amortization (discount accretion), net		15,757			8,251			4,460
Gain on sale of assets, net		(2,628	)		(80	)		(2,765	)
Deferred federal income tax expense (benefit)		(1,517	)		2,005			1,089
Change in loans held for sale		(827	)		2,531			(8,837	)
Change in other assets		(5,170	)		(1,075	)		4,573
Change in other liabilities		1,818			1,132			(2,415	)
Total adjustments		18,837			26,742			12,169
Net cash provided by operating activities		93,062			95,111			71,828
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash paid for acquisition of bank, less cash acquired		—			—			(2,463	)
Net decrease (increase) in interest-bearing time deposits in banks		12,170			42,511			(47,063	)
Activity in available-for-sale securities:
Sales		144,144			22,970			28,039
Maturities		1,909,635			1,886,632			1,812,241
Purchases		(2,049,275	)		(2,171,404	)		(2,068,639	)
Activity in held-to-maturity securities - maturities		2,557			5,458			6,216
Net increase in loans		(306,412	)		(108,152	)		(82,823	)
Purchases of bank premises and equipment and computer software		(16,180	)		(14,777	)		(11,240	)
Proceeds from sale of other assets		8,370			5,732			9,924
Net cash used in investing activities		(294,991	)		(331,030	)		(355,808	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in noninterest-bearing deposits		210,132			142,103			99,387
Net increase in interest-bearing deposits		87,654			79,394			179,237
Net increase in short-term borrowings		51,941			29,400			32,262
Common stock transactions:
Proceeds from stock issuances		824			950			789
Dividends paid		(38,719	)		(29,359	)		(28,346	)
Net cash provided by financing activities		311,832			222,488			283,329
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		109,903			(13,431	)		(651	)
CASH AND CASH EQUIVALENTS, beginning of year		250,836			264,267			264,918
CASH AND CASH EQUIVALENTS, end of year	$	360,739		$	250,836		$	264,267

The accompanying notes are an integral part of these consolidated financial statements.

F-6

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

Nature of Operations

First Financial Bankshares, Inc. (a Texas corporation) (“Bankshares”, “Company”, “we” or “us”) is a financial holding company which owns all of the capital stock of one bank with 55 locations located in Texas as of December 31, 2012. The subsidiary bank is First Financial Bank, National Association, Abilene. The bank’s primary source of revenue is providing loans and banking services to consumers and commercial customers in the market area in which the subsidiary is located. In addition, the Company also owns First Financial Trust & Asset Management Company, National Association, First Financial Insurance Agency, Inc., and First Technology Services, Inc. During 2011, First Financial Bankshares of Delaware, Inc and First Financial Investments of Delaware, Inc. were merged into the Company.

A summary of significant accounting policies of Bankshares and subsidiaries applied in the preparation of the accompanying consolidated financial statements follows. The accounting principles followed by the Company and the methods of applying them are in conformity with both U. S. generally accepted accounting principles and prevailing practices of the banking industry.

The Company evaluated subsequent events for potential recognition through the date the consolidated financial statements were issued.

Use of Estimates in Preparation of Financial Statements

The preparation of financial statements in conformity with U. S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Consolidation

The accompanying consolidated financial statements include the accounts of Bankshares and its subsidiaries, all of which are wholly-owned. All significant intercompany accounts and transactions have been eliminated. Certain reclassifications have been made to 2010 and 2011 financial statements to conform to the 2012 presentation.

Consolidation of Bank Charters

Effective December 30, 2012, the Company consolidated its eleven bank charters into one charter. Regulatory, compliance and technology complexities and the opportunity for cost savings were the reasons for making this change. We expect to operate the prior eleven bank charters as regions with local management decisions with recommendations from the bank region’s advisory board to benefit the customers and communities it serves as we do currently.

Stock Split

On April 26, 2011, the Company’s Board of Directors declared a three-for-two stock split in the form of a 50% stock dividend effective for shareholders of record on May 16, 2011 that was distributed on June 1, 2011. All share and per share amounts in this report have been restated to reflect this stock split. An amount equal to the par value of the additional common shares issued pursuant to the stock split was reflected as a transfer from retained earnings to common stock on the consolidated financial statements as of and for the year ended December 31, 2011.

F-7

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

Increase in Authorized Shares

On April 24, 2012, the Company’s shareholders approved an amendment to the Company’s Amended and Restated Certificate of Formation to increase the number of authorized common shares to 80,000,000.

Stock Repurchase

On October 26, 2011, the Company’s Board of Directors authorized the repurchase of up to 750,000 shares of its common stock through September 30, 2014. The stock buyback plan authorizes management to repurchase the stock at such time as repurchases are considered beneficial to stockholders. Any repurchase of stock will be made through the open market, block trades or in privately negotiated transactions in accordance with applicable laws and regulations. Under the repurchase plan, there is no minimum number of shares that the Company is required to repurchase. Through December 31, 2012, no shares have been repurchased under this authorization.

Investment Securities

The Company records its available-for-sale and trading securities portfolio at fair value.

Management classifies debt and equity securities as held-to-maturity, available-for-sale, or trading based on its intent. Debt securities that management has the positive intent and ability to hold to maturity are classified as held-to-maturity and recorded at cost, adjusted for amortization of premiums and accretion of discounts, which are recognized as adjustments to interest income using the interest method. Securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at estimated fair value, with all unrealized gains and unrealized losses judged to be temporary, net of deferred income taxes, excluded from earnings and reported in the consolidated statements of comprehensive earnings. Available- for-sale securities that have unrealized losses that are judged other than temporary are included in gain (loss) on sale of securities and a new cost basis is established. Securities classified as trading are recorded at estimated fair value with unrealized gains and losses included in earnings.

Fair values of these securities are determined based on methodologies in accordance with current authoritative accounting guidance. Fair values are volatile and may be influenced by a number of factors, including market interest rates, prepayment speeds, discount rates, credit ratings and yield curves. Fair values for investment securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on the quoted prices of similar instruments or an estimate of fair value by using a range of fair value estimates in the market place as a result of the illiquid market specific to the type of security.

When the fair value of a security is below its amortized cost, and depending on the length of time the condition exists and the extent the fair value is below amortized cost, additional analysis is performed to determine whether an other-than-temporary impairment condition exists. Available-for-sale and held-to-maturity securities are analyzed quarterly for possible other-than-temporary impairment. The analysis considers (i) whether we have the intent to sell our securities prior to recovery and/or maturity, (ii) whether it is more likely than not that we will have to sell our securities prior to recovery and/or maturity, (iii) the length of time and extent to which the fair value has been less than costs, and (iv) the financial condition of the issuer. Often, the information available to conduct these assessments is limited and rapidly changing, making estimates of fair value subject to judgment. If actual information or conditions are different than estimated, the extent of the impairment of the security may be different than previously estimated, which could have a material effect on the Company’s results of operations and financial condition.

F-8

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

The Company’s investment portfolio consists of traditional investments, substantially in U. S. Treasury securities, obligations of U. S. government sponsored-enterprises and agencies, mortgage pass-through securities, corporate bonds and general obligation or revenue based municipal bonds. Pricing for such securities is generally readily available and transparent in the market. The Company utilizes independent third party pricing services to value its investment securities. The Company reviews the prices supplied by the independent pricing services as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with traditional pricing matrices. The Company validates quarterly, on a sample basis, prices supplied by the independent pricing services by comparison to prices obtained from other third party sources.

Loans and Allowance for Loan Losses

Loans held for investment are stated at the amount of unpaid principal, reduced by unearned income and an allowance for loan losses. Interest on loans is calculated by using the simple interest method on daily balances of the principal amounts outstanding. The Company defers and amortizes net loan origination fees and costs as an adjustment to yield. The allowance for loan losses is established through a provision for loan losses charged to expense. Loans are charged against the allowance for loan losses when management believes the collectability of the principal is unlikely.

The Company has certain lending policies and procedures in place that are designed to maximize loan income with an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis and makes changes as appropriate. Management receives and reviews periodic reports related to loan originations, quality, concentrations, delinquencies, nonperforming and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions, both by type of loan and geographic location.

Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and effectively. Underwriting standards are designed to determine whether the borrower possesses sound business ethics and practices and to evaluate current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the identified cash flows of the borrower and, secondarily, on the underlying collateral provided by the borrower. Most commercial loans are secured by the assets being financed or other business assets, such as accounts receivable or inventory and include personal guarantees.

Agricultural loans are subject to underwriting standards and processes similar to commercial loans. These agricultural loans are based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. Most agricultural loans are secured by the agriculture related assets being financed, such as farm land, cattle or equipment and include personal guarantees.

Real estate loans are also subject to underwriting standards and processes similar to commercial and agricultural loans. These loans are underwritten primarily based on projected cash flows and, secondarily, as loans secured by real estate. The repayment of real estate loans is generally largely dependent on the successful operation of the property securing the loans or the business conducted on the property securing the loan. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s real estate portfolio are generally diverse in terms of type and geographic location. This diversity helps reduce the exposure to adverse economic events that affect any single market or industry. Generally, real estate loans are owner occupied which further reduces the Company’s risk.

Consumer loan underwriting utilizes methodical credit standards and analysis to supplement the Company’s underwriting policies and procedures. The Company’s loan policy addresses types of consumer loans that may be originated and the collateral, if secured, which must be perfected. The relatively smaller individual dollar amounts of consumer loans that are spread over numerous individual borrowers also minimize the Company’s risk.

The allowance is an amount management believes is appropriate to absorb probable losses that have been incurred on existing loans as of the balance sheet date based upon management’s review and evaluation of the loan portfolio. The allowance for loan losses is comprised of three elements: (i) specific reserves determined in accordance with

F-9

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

current authoritative accounting guidance based on probable losses on classified loans; (ii) general reserve determined in accordance with current authoritative accounting guidance that considers historical loss rates; and (iii) qualitative reserves determined in accordance with current authoritative accounting guidance based upon general economic conditions and other qualitative risk factors both internal and external to the Company. The allowance for loan losses is increased by charges to income and decreased by charge-offs (net of recoveries). Management’s periodic evaluation of the appropriateness of the allowance is based on general economic conditions, the financial condition of borrowers, the value and liquidity of collateral, delinquency, prior loan loss experience, and the results of periodic reviews of the portfolio. For purposes of determining our general reserve, the loan portfolio, less cash secured loans, government guaranteed loans and classified loans, is multiplied by the Company’s historical loss rate. Our methodology is constructed so that specific reserves are increased in response to deterioration in credit quality and a corresponding increase in risk of loss. In addition, we adjust our allowance for qualitative factors such as current local economic conditions and trends, including, without limitations, unemployment, changes in lending staff, policies and procedures, changes in credit concentrations, changes in the trends and severity of problem loans and changes in trends in volume and terms of loans. This additional qualitative reserve serves to compensate for additional areas of uncertainty inherent in our portfolio that are not reflected in our historic loss factors.

Although we believe we use the best information available to make loan loss allowance determinations, future adjustments could be necessary if circumstances or economic conditions differ substantially from the assumptions used in making our initial determinations. A further downturn in the economy and employment could result in increased levels of non-performing assets and charge-offs, increased loan provisions and reductions in income. Additionally, bank regulatory agencies periodically review our allowance for loan losses and could require additions to the loan loss allowance based on their judgment of information available to them at the time of their examination.

Accrual of interest is discontinued on a loan and payments are applied to principal when management believes, after considering economic and business conditions and collection efforts, the borrower’s financial condition is such that collection of interest is doubtful. Except consumer loans, generally all loans past due greater than 90 days, based on contractual terms, are placed on non-accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Consumer loans are generally charged-off when a loan becomes past due 90 days. For other loans in the portfolio, facts and circumstances are evaluated in making charge-off decisions.

Loans are considered impaired when, based on current information and events, it is probable we will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. If a loan is impaired, a specific reserve is recorded, if necessary. Interest payments on impaired loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Impaired loans, or portions thereof, are charged off when deemed uncollectable.

The Company’s policy requires measurement of the allowance for an impaired, collateral dependent loan based on the fair value of the collateral. Other loan impairments are measured based on the present value of expected future cash flows or the loan’s observable market price. At December 31, 2012 and 2011, all significant impaired loans have been determined to be collateral dependent and the allowance for loss has been measured utilizing the estimated fair value of the collateral.

From time to time, the Company modifies its loan agreement with a borrower. A modified loan is considered a troubled debt restructuring when two conditions are met: (i) the borrower is experiencing financial difficulty and (ii) concessions are made by the Company that would not otherwise be considered for a borrower with similar credit risk characteristics. Modifications to loan terms may include a lower interest rate, a reduction of principal, or a longer term to maturity. To date, troubled debt restructurings have been such that, after considering economic and business conditions and collection efforts, the collection of interest is doubtful and therefore the loan has been placed on non-accrual. Each of these loans is evaluated for impairment and a specific reserve is recorded based on probable losses, taking into consideration the related collateral and modified loan terms and cash flow. As of December 31, 2012 and 2011, all of the Company’s troubled debt restructured loans are included in the non-accrual totals.

F-10

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

The Company originates certain mortgage loans for sale in the secondary market. Accordingly, these loans are classified as held for sale and are carried at the lower of cost or fair value on an aggregate basis. The mortgage loan sales contracts contain indemnification clauses should the loans default, generally in the first three to six months, or if documentation is determined not to be in compliance with regulations. The Company’s historic losses as a result of these indemnities have been insignificant.

Other Real Estate

Other real estate is foreclosed property held pending disposition and is initially recorded at fair value, less estimated costs to sell. At foreclosure, if the fair value of the real estate, less estimated costs to sell, is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for loan losses. Any subsequent reduction in value is recognized by a charge to income. Operating and holding expenses of such properties, net of related income, and gains and losses on their disposition are included in net gain (loss) on sale of foreclosed assets as incurred.

Bank Premises and Equipment

Bank premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed principally on a straight-line basis over the estimated useful lives of the related assets. Leasehold improvements are amortized over the life of the respective lease or the estimated useful lives of the improvements, whichever is shorter.

Business Combinations, Goodwill and Other Intangible Assets

The Company accounts for all business combinations under the purchase method of accounting. Tangible and intangible assets and liabilities of the acquired entity are recorded at fair value. Intangible assets with finite useful lives represent the future benefit associated with the acquisition of the core deposits and are amortized over seven years, utilizing a method that approximates the expected attrition of the deposits. Goodwill and intangible assets with indefinite lives are not amortized, but rather tested annually for impairment as of June 30 each year and totaled $71,865,000 at both December 31, 2012 and 2011. There was no impairment recorded for the years ended December 31, 2012, 2011 and 2010.

The carrying amount of goodwill arising from acquisitions that qualify as an asset purchase for federal income tax purposes was approximately $49,609,000 at both December 31, 2012 and 2011, and is deductible for federal income tax purposes.

Securities Sold Under Agreements To Repurchase

Securities sold under agreements to repurchase, which are classified as short-term borrowings, generally mature within one to four days from the transaction date. Securities sold under agreements to repurchase are reflected at the amount of the cash received in connection with the transaction. The Company may be required to provide additional collateral based on the estimated fair value of the underlying securities.

F-11

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

Segment Reporting

The Company has determined that its banking regions meet the aggregation criteria of the current authoritative accounting guidance since each of its banking regions offers similar products and services, operates in a similar manner, has similar customers and reports to the same regulatory authority, and therefore operates one line of business (community banking) located in a single geographic area (Texas).

Statements of Cash Flows

For purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks, including interest-bearing deposits in banks with original maturity of 90 days or less, and federal funds sold.

Accumulated Other Comprehensive Income (Loss)

Unrealized gains on the Company’s available-for-sale securities (after applicable income tax expense) totaling $59,669,000 and $54,568,000 at December 31, 2012 and 2011, respectively, and the minimum pension liability totaled (after applicable income tax benefit) totaling $8,360,000 and $7,343,000 at December 31, 2012 and 2011, respectively, are included in accumulated other comprehensive income.

Income Taxes

The Company’s provision for income taxes is based on income before income taxes adjusted for permanent differences between financial reporting and taxable income. Deferred tax assets and liabilities are determined using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws.

Stock Based Compensation

The Company grants stock options for a fixed number of shares to employees with an exercise price equal to the fair value of the shares at the grant date. The Company recorded stock option expense totaling $334,000, $427,000 and $387,000 for the years ended December 31, 2012, 2011 and 2010, respectively.

Advertising Costs

Advertising costs are expensed as incurred.

F-12

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

Per Share Data

Net earnings per share (“EPS”) are computed by dividing net earnings by the weighted average number of common stock shares outstanding during the period. The Company calculates dilutive EPS assuming all outstanding options to purchase common stock have been exercised at the beginning of the year (or the time of issuance, if later.) The dilutive effect of the outstanding options is reflected by application of the treasury stock method, whereby the proceeds from the exercised options are assumed to be used to purchase common stock at the average market price during the period. The following table reconciles the computation of basic EPS to dilutive EPS:

	Net Earnings (in thousands)		Weighted Average Shares		Per Share Amount
For the year ended December 31, 2012
Net earnings per share, basic	$	74,225		31,480,155	$	2.36
Effect of stock options		—		21,112		—
Net earnings per share, assuming dilution	$	74,225		31,501,267	$	2.36
For the year ended December 31, 2011:
Net earnings per share, basic	$	68,369		31,443,712	$	2.17
Effect of stock options		—		18,252		—
Net earnings per share, assuming dilution	$	68,369		31,461,964	$	2.17
For the year ended December 31, 2010:
Net earnings per share, basic	$	59,659		31,291,486	$	1.91
Effect of stock options		—		28,077		—
Net earnings per share, assuming dilution	$	59,659		31,319,563	$	1.91

Recently Issued Authoritative Accounting Guidance

In 2011, the Financial Accounting Standards Board (the “FASB”) amended its authoritative guidance to require that all changes in stockholders’ equity be presented in either a single continuous statement of comprehensive income or in two separate but consecutive statements. Additionally, the authoritative guidance requires entities to present, on the face of the financial statements, reclassification adjustments for items that are reclassified from other comprehensive income to net income in the statement or statements where the components of net income and the components of other comprehensive income are presented. The option to present components of other comprehensive income as part of the statement of changes in stockholder’s equity was eliminated. The new guidance was effective January 1, 2012, although certain provisions in the guidance have been deferred to allow the FASB time to re-deliberate. The new guidance did not have a significant impact on the Company’s financial statements.

In 2011, the FASB amended its authoritative guidance related to goodwill impairment to give entities the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary. However, if an entity concludes otherwise, then it is required to perform the first step of the two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit. The new guidance was effective for annual and interim impairment tests in 2012, and did not have a significant impact on the Company’s financial statements.

F-13

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

In 2011, the FASB amended its authoritative guidance related to fair value measurements and disclosures to converge the fair value measurement guidance in U.S. generally accepted accounting principles and International Financial Reporting Standards. The amendment clarifies the application of existing fair value measurement requirements, changes certain principles in existing literature and requires additional fair value disclosures. The new guidance was effective January 1, 2012 and did not have a significant impact on the Company’s financial statement, except for additional disclosures.

In 2011, the FASB amended its authoritative guidance related to offsetting assets and liabilities to require an entity to disclose both gross and net information about financial instruments, such as sales and repurchase agreements and reverse sales and repurchase agreements and securities borrowing/lending arrangements, and derivative instruments that are eligible for offset in the statement of financial position and/or subject to a master netting arrangement or similar agreement. The new guidance is effective for annual and interim periods beginning on January 1, 2013, and is not expected to have a significant impact on the Company’s financial statements.

2. INTEREST-BEARING TIME DEPOSITS IN BANKS AND SECURITIES:

Interest-bearing time deposits in banks totaled $49,005,000 and $61,175,000 at December 31, 2012 and 2011, respectively, and have original maturities generally ranging from one to two years. Of these amounts, $44,776,000 and $51,813,000, respectively, are time deposits with balances greater than $100,000 at December 31, 2012 and 2011.

F-14

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

A summary of the Company’s available-for-sale and held-to-maturity securities as of December 31, 2012 and 2011 are as follows (in thousands):

	December 31, 2012
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U. S. Treasury securities	$	6,042	$	48	$	—		$	6,090
Obligations of U.S. government sponsored-enterprises and agencies		219,420		4,060		—			223,480
Obligations of state and political subdivisions		786,278		57,541		(129	)		843,690
Corporate bonds and other		117,244		6,020		(73	)		123,191
Residential mortgage-backed securities		564,434		23,285		(443	)		587,276
Commercial mortgage-backed securities		33,819		1,739		(250	)		35,308
Total securities available-for-sale	$	1,727,237	$	92,693	$	(895	)	$	1,819,035
Securities held-to-maturity:
Obligations of state and political subdivisions	$	735	$	7	$	—		$	742
Residential mortgage-backed securities		294		11		—			305
Commercial mortgage-backed securities		32		1		—			33
Total debt securities held-to-maturity	$	1,061	$	19	$	—		$	1,080

F-15

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

	December 31, 2011
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U. S. Treasury Securities	$	15,143	$	204	$	—		$	15,347
Obligations of U.S. government sponsored-enterprises and agencies		255,548		5,802		(4	)		261,346
Obligations of state and political subdivisions		655,957		48,812		(98	)		704,671
Corporate bonds and other		127,514		4,215		(255	)		131,474
Residential mortgage-backed securities		681,277		24,247		(89	)		705,435
Commercial mortgage-backed securities		22,003		1,113		—			23,116
Total securities available-for-sale	$	1,757,442	$	84,393	$	(446	)	$	1,841,389
Securities held-to-maturity:
Obligations of state and political subdivisions	$	3,187	$	30	$	—		$	3,217
Residential mortgage-backed securities		358		14		—			372
Commercial mortgage-backed securities		64		2		—			66
Total debt securities held-to-maturity	$	3,609	$	46	$	—		$	3,655

The Company invests in mortgage-backed securities that have expected maturities that differ from their contractual maturities. These differences arise because borrowers may have the right to call or prepay obligations with or without a prepayment penalty. These securities include collateralized mortgage obligations (CMOs) and other asset backed securities. The expected maturities of these securities at December 31, 2012, were computed by using scheduled amortization of balances and historical prepayment rates. At December 31, 2012 and 2011, the Company did not hold any CMOs that entail higher risks than standard mortgage-backed securities.

F-16

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

The amortized cost and estimated fair value of debt securities at December 31, 2012, by contractual and expected maturity, are shown below (in thousands):

	Available-for-Sale				Held-to-Maturity
	Amortized Cost Basis		Estimated Fair Value		Amortized Cost Basis		Estimated Fair Value
Due within one year	$	156,237	$	158,605	$	655	$	658
Due after one year through five years		494,482		514,761		80		84
Due after five years through ten years		467,185		509,127		—		—
Due after ten years		11,080		13,958		—		—
Mortgage-backed securities		598,253		622,584		326		338
Total	$	1,727,237	$	1,819,035	$	1,061	$	1,080

The following table discloses, as of December 31, 2012 and 2011, the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 or more months (in thousands):

	Less than 12 Months				12 Months or Longer				Total
December 31, 2012	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of state and political subdivisions	$	36,480	$	129	$	—	$	—	$	36,480	$	129
Residential mortgage-backed securities		17,344		401		3,574		42		20,918		443
Commercial mortgage-backed securities		12,453		250		—		—		12,453		250
Corporate bonds and other		4,994		73		—		—		4,994		73
Total	$	71,271	$	853	$	3,574	$	42	$	74,845	$	895

	Less than 12 Months				12 Months or Longer				Total
December 31, 2011	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of U. S. government sponsored-enterprises and agencies	$	3,114	$	4	$	—	$	—	$	3,114	$	4
Obligations of state and political subdivisions		9,595		98		—		—		9,595		98
Residential mortgage-backed securities		13,722		89		—		—		13,722		89
Corporate bonds and other		17,533		255		—		—		17,533		255
Total	$	43,964	$	446	$	—	$	—	$	43,964	$	446

The number of investment positions in this unrealized loss position totaled 90 at December 31, 2012. We do not believe these unrealized losses are “other than temporary” as (i) we do not have the intent to sell our securities prior to recovery and/or maturity and, (ii) it is more likely than not that we will not have to sell our securities prior to recovery and/or maturity. In making this determination, we also consider the length of time and extent to which fair value has been less than cost and the financial condition of the issuer. The unrealized losses noted are interest rate related due to the level of interest rates at December 31, 2012 compared to the time of purchase. We have reviewed the ratings of the issuers and have not identified any issues related to the ultimate repayment of principal as a result of credit concerns on these securities. Our mortgage related securities are backed by GNMA, FNMA and FHLMC or are collateralized by securities backed by these agencies.

Securities, carried at approximately $843,859,000 and $829,074,000 at December 31, 2012 and 2011, respectively, were pledged as collateral for public or trust fund deposits, securities sold under agreements to repurchase and for other purposes required or permitted by law.

F-17

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

During 2012, 2011, and 2010, sales of investment securities that were classified as available-for-sale totaled approximately $144,144,000, $22,970,000, and $28,039,000 respectively. Gross realized gains from 2012, 2011, and 2010, securities sales were approximately $2,816,000, $505,000, and $363,000, respectively. Gross realized losses from 2012 and 2011 securities sales were approximately $44,000 and $13,000, respectively. There were no losses on securities sales in 2010. The specific identification method was used to determine cost in computing the realized gains and losses.

3. LOANS AND ALLOWANCE FOR LOAN LOSSES:

Major classifications of loans are as follows (in thousands):

	December 31,
	2012		2011
Commercial	$	509,609	$	454,087
Agricultural		68,306		68,122
Real estate		1,226,823		1,041,396
Consumer		272,428		212,310
Total loans held for investment	$	2,077,166	$	1,775,915

Certain amounts above for December 31, 2011 have been reclassified from prior presentation to be consistent with December 31, 2012 presentation.

Loans held for sale totaled $11,457,000 and $10,629,000 at December 31, 2012 and 2011, respectively, in which the carrying amounts approximate fair value.

The Company’s non-accrual loans, loan still accruing and past due 90 days or more restructured loans are as follows (in thousands):

	December 31,
	2012		2011
Non-accrual loans	$	21,800	$	19,975
Loans still accruing and past due 90 days or more		97		96
Restructured loans *		—		—
Total	$	21,897	$	20,071

* Restructured loans whose interest collection, after considering economic and business conditions and collection efforts, are doubtful are included in non-accrual loans.

F-18

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

The Company’s recorded investment in impaired loans and the related valuation allowance are as follows (in thousands):

December 31, 2012				December 31, 2011
Recorded Investment		Valuation Allowance		Recorded Investment		Valuation Allowance
$	21,800	$	6,010	$	19,975	$	5,953

The average recorded investment in impaired loans for the years ended December 31, 2012, 2011, and 2010 was approximately $24,025,000, $22,348,000, and $17,242,000 respectively. The Company had approximately $25,462,000, and $29,535,000 in nonaccrual, past due 90 days still accruing, restructured loans and foreclosed assets at December 31, 2012 and 2011, respectively. Non-accrual loans totaled $21,800,000 and $19,975,000, respectively, of this amount and consisted of (in thousands):

	December 31,
	2012		2011
Commercial	$	2,251	$	3,450
Agricultural		372		145
Real Estate		18,698		16,193
Consumer		479		187
Total	$	21,800	$	19,975

No additional funds are committed to be advanced in connection with impaired loans.

The Company’s impaired loans and related allowance as of December 31, 2012 and 2011 is summarized in the following table (in thousands). No interest income was recognized on impaired loans subsequent to their classification as impaired.

December 31, 2012	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment
Commercial	$	2,677	$	20	$	2,231	$	2,251	$	1,350	$	2,966
Agricultural		381		—		372		372		131		437
Real Estate		22,569		2,049		16,649		18,698		4,356		20,164
Consumer		543		115		364		479		173		458
Total	$	26,170	$	2,184	$	19,616	$	21,800	$	6,010	$	24,025

December 31, 2011	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment
Commercial	$	3,856	$	—	$	3,450	$	3,450	$	2,092	$	3,801
Agricultural		199		3		142		145		79		246
Real Estate		19,305		1,786		14,407		16,193		3,708		18,068
Consumer		227		29		158		187		74		233
Total	$	23,587	$	1,818	$	18,157	$	19,975	$	5,953	$	22,348

The Company recognized interest income on impaired loans of approximately $384,000, $1,137,000 and $425,000 during the years ended December 31, 2012, 2011, and 2010, respectively.

F-19

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

From a credit risk standpoint, the Company classifies its loans in one of four categories: (i) pass, (ii) special mention, (iii) substandard or (iv) doubtful. Loans classified as loss are charged-off.

The classifications of loans reflect a judgment about the risks of default and loss associated with the loan. The Company reviews the ratings on our credits as part of our on-going monitoring of the credit quality of our loan portfolio. Ratings are adjusted to reflect the degree of risk and loss that is felt to be inherent in each credit as of each monthly reporting period. Our methodology is structured so that specific reserves are increased in accordance with deterioration in credit quality (and a corresponding increase in risk and loss) or decreased in accordance with improvement in credit quality (and a corresponding decrease in risk and loss).

Credits rated special mention show clear signs of financial weaknesses or deterioration in credit worthiness, however, such concerns are not so pronounced that the Company generally expects to experience significant loss within the short-term. Such credits typically maintain the ability to perform within standard credit terms and credit exposure is not as prominent as credits rated more harshly.

Credit rated substandard are those in which the normal repayment of principal and interest may be, or has been, jeopardized by reason of adverse trends or developments of a financial, managerial, economic or political nature, or important weaknesses exist in collateral. A protracted workout on these credits is a distinct possibility. Prompt corrective action is therefore required to strengthen the Company’s position, and/or to reduce exposure and to assure that adequate remedial measures are taken by the borrower. Credit exposure becomes more likely in such credits and a serious evaluation of the secondary support to the credit is performed.

Credits rated doubtful are those in which full collection of principal appears highly questionable, and which some degree of loss is anticipated, even thought the ultimate amount of loss may not yet be certain and/or other factors exist which could affect collection of debt. Based upon available information, positive action by the Company is required to avert or minimize loss. Credits rated doubtful are generally also placed on nonaccrual.

At December 31, 2012 and 2011, the following summarizes the Company’s internal ratings of its loans (in thousands):

December 31, 2012	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	498,188	$	2,193	$	9,198	$	30	$	509,609
Agricultural		64,397		342		3,559		8		68,306
Real Estate		1,176,330		14,680		35,673		140		1,226,823
Consumer		271,114		382		911		21		272,428
Total	$	2,010,029	$	17,597	$	49,341	$	199	$	2,077,166

December 31, 2011	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	432,110	$	9,227	$	12,748	$	2	$	454,087
Agricultural		65,007		347		2,755		13		68,122
Real Estate		980,308		20,922		40,068		98		1,041,396
Consumer		211,177		302		820		11		212,310
Total	$	1,688,602	$	30,798	$	56,391	$	124	$	1,775,915

F-20

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

At December 31, 2012 and 2011, the Company’s past due loans are as follows (in thousands):

December 31, 2012	15-59 Days Past Due *		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Total Current		Total Loans		Total 90 Days Past Due Still Accruing
Commercial	$	1,708	$	470	$	247	$	2,425	$	507,184	$	509,609	$	—
Agricultural		467		95		—		562		67,744		68,306		—
Real Estate		10,141		2,711		1,237		14,089		1,212,734		1,226,823		34
Consumer		1,660		287		163		2,110		270,318		272,428		63
Total	$	13,976	$	3,563	$	1,647	$	19,186	$	2,057,980	$	2,077,166	$	97

December 31, 2011	15-59 Days Past Due *		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Total Current		Total Loans		Total 90 Days Past Due Still Accruing
Commercial	$	1,574	$	430	$	—	$	2,004	$	452,083	$	454,087	$	—
Agricultural		300		60		—		360		67,762		68,122		—
Real Estate		10,215		547		988		11,750		1,029,646		1,041,396		62
Consumer		1,396		128		47		1,571		210,739		212,310		34
Total	$	13,485	$	1,165	$	1,035	$	15,685	$	1,760,230	$	1,775,915	$	96

* The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

The allowance for loan losses as of December 31, 2012 and 2011, is presented below (in thousands). Management has evaluated the appropriateness of the allowance for loan losses by estimating the losses in various categories of the loan portfolio which are identified below:

	2012		2011
Allowance for loan losses provided for:
Loans specifically evaluated as impaired	$	6,010	$	5,953
Remaining portfolio		28,829		28,362
Total allowance for loan losses	$	34,839	$	34,315

The following table details the allowance for loan loss at December 31, 2012 and 2011 by portfolio segment (in thousands). Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	3,253	$	388	$	8,380	$	308	$	12,329
Loan collectively evaluated for impairment		4,090		1,153		15,683		1,584		22,510
Total	$	7,343	$	1,541	$	24,063	$	1,892	$	34,839

December 31, 2011	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	4,647	$	758	$	8,310	$	282	$	13,997
Loan collectively evaluated for impairment		5,017		724		13,223		1,354		20,318
Total	$	9,664	$	1,482	$	21,533	$	1,636	$	34,315

F-21

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

Changes in the allowance for loan losses for the years ended December 31, 2012 and 2011 are summarized as follows (in thousands):

December 31, 2012	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	9,664		$	1,482		$	21,533		$	1,636		$	34,315
Provision (credit) for loan losses		(2,103	)		58			4,842			687			3,484
Recoveries		281			54			639			421			1,395
Charge-offs		(499	)		(53	)		(2,951	)		(852	)		(4,355	)
Ending balance	$	7,343		$	1,541		$	24,063		$	1,892		$	34,839

December 31, 2011	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	7,745		$	2,299		$	19,101		$	1,961		$	31,106
Provision (credit) for loan losses		1,949			(755	)		5,240			192			6,626
Recoveries		610			33			874			390			1,907
Charge-offs		(640	)		(95	)		(3,682	)		(907	)		(5,324	)
Ending balance	$	9,664		$	1,482		$	21,533		$	1,636		$	34,315

The Company’s recorded investment in loans as of December 31, 2012 and 2011 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology was as follows (in thousands):

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	11,421	$	3,909	$	50,493	$	1,314	$	67,137
Loan collectively evaluated for impairment		498,188		64,397		1,176,330		271,114		2,010,029
Total	$	509,609	$	68,306	$	1,226,823	$	272,428	$	2,077,166

December 31, 2011	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	21,977	$	3,115	$	61,088	$	1,133	$	87,313
Loan collectively evaluated for impairment		432,110		65,007		980,308		211,177		1,688,602
Total	$	454,087	$	68,122	$	1,041,396	$	212,310	$	1,775,915

The Company’s loans that were modified in the years ended December 31, 2012 and 2011, and considered a troubled debt restructuring are as follows (dollars in thousands):

	Year ended December 31, 2012						Year ended December 31, 2011
	Number		Pre-Modification Recorded Investment		Post- Modification Recorded Investment		Number		Pre-Modification Recorded Investment		Post- Modification Recorded Investment
Commercial		18	$	1,180	$	1,180		8	$	2,467	$	2,467
Agricultural		5		354		354		4		2,566		2,566
Real Estate		34		12,304		12,304		9		2,292		2,292
Consumer		2		20		20		—		—		—
Total		59	$	13,858	$	13,858		21	$	7,325	$	7,325

F-22

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

The balances below provide information as to how the loans were modified as troubled debt restructured loans during the year ended December 31, 2012 and 2011 (in thousands):

	Year ended December 31, 2012						Year ended December 31, 2011
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	509	$	298	$	373	$	2,350	$	118	$	—
Agricultural		243		15		95		—		2,566		—
Real Estate		935		2,893		8,477		492		1,468		331
Consumer		—		19		1		—		—		—
Total	$	1,687	$	3,225	$	8,946	$	2,842	$	4,152	$	331

There were eight loans modified as a troubled debt restructured loan within the previous 12 months and for which there was a payment default during the year ended December 31, 2012. A default for purposes of this disclosure is a troubled debt restructured loan in which the borrower is 90 days past due or results in the foreclosure and repossession of the applicable collateral. There were no such defaults for the year ended December 31, 2011. The loans are as follows (dollars in thousands):

	Year ended December 31, 2012
	Number		Balance
Commercial		1	$	30
Agriculture		—		—
Real Estate		6		1,509
Consumer		1		19
Total		8	$	1,558

As of December 31, 2012, the Company has no commitments to lend additional funds to loan customers whose terms have been modified in troubled debt restructurings.

An analysis of the changes in loans to officers, directors, principal shareholders, or associates of such persons for the year ended December 31, 2012 (determined as of each respective year-end) follows (in thousands):

	Beginning Balance		Additional Loans		Payments		Ending Balance
Year ended December 31, 2012	$	42,548	$	81,196	$	80,226	$	43,518

In the opinion of management, those loans are on substantially the same terms, including interest rates and collateral requirements, as those prevailing at the time for comparable transactions with unaffiliated persons.

We have established a line of credit with the Federal Home Loan Bank of Dallas to provide liquidity and meet pledging requirements for those customers eligible to have securities pledged to secure certain uninsured deposits. At December 31, 2012, approximately $223,678,000 in loans held by our bank subsidiary were subject to blanket liens as security for letters of credit issued under these lines of credit. At December 31, 2012, $87,700,000 letters of credit issued by the Federal Home Loan Bank of Dallas were outstanding under these lines of credit. These letters of credit were pledged as collateral for public funds held by our bank.

F-23

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

4. BANK PREMISES AND EQUIPMENT:

The following is a summary of bank premises and equipment (in thousands):

	Useful Life	December 31,
		2012			2011
Land	—	$	19,024		$	17,542
Buildings	20 to 40 years		81,988			76,822
Furniture and equipment	3 to 10 years		47,921			42,844
Leasehold improvements	Lesser of lease term or 5 to 15 years		4,137			3,991
			153,070			141,199
Less- accumulated depreciation and amortization			(68,948	)		(64,716	)
		$	84,122		$	76,483

Depreciation expense for the years ended December 31, 2012, 2011 and 2010 amounted to $6,492,000, $5,875,000, and $5,604,000, respectively and is included in the captions net occupancy expense and equipment expense in the accompanying consolidated statements of earnings.

The Company is lessor for portions of its banking premises. Total rental income for all leases included in net occupancy expense is approximately $1,703,000, $1,646,000 and $1,687,000, for the years ended December 31, 2012, 2011, and 2010, respectively.

5. DEPOSITS AND SHORT-TERM BORROWINGS

Time deposits of $100,000 or more totaled approximately $354,775,000 and $433,813,000 at December 31, 2012 and 2011, respectively.

At December 31, 2012, the scheduled maturities of time deposits (in thousands) were, as follows:

Year ending December 31,
2013	$	581,053
2014		37,769
2015		8,366
2016		4,893
Thereafter		4,959
	$	637,040

Deposits received from related parties at December 31, 2012 and 2011 totaled $109,638,000 and $93,267,000, respectively.

Included in short-term borrowings at December 31, 2012 and 2011 are $235,572,000 and $205,561,000, respectively, in securities sold under agreements to repurchase.

F-24

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

6. LINE OF CREDIT

The Company renewed its loan agreement, effective June 30, 2011, with The Frost National Bank. Under the loan agreement, as renewed and amended, the Company is permitted to draw up to $25.0 million on a revolving line of credit. Prior to June 30, 2013, interest is paid quarterly at Wall Street Journal Prime and the line of credit matures June 30, 2013. If a balance exists at June 30, 2013, the principal balance converts to a term facility payable quarterly over five years and interest is paid quarterly at the election of the Company at Wall Street Journal Prime plus 50 basis points or LIBOR plus 250 basis points. The line of credit is unsecured. Among other provisions in the credit agreement, the Company must satisfy certain financial covenants during the term of the loan agreement, including, without limitation, covenants that require the Company to maintain certain capital, tangible net worth, loan loss reserve, non-performing asset and cash flow coverage ratio. In addition, the credit agreement contains certain operational covenants, that among others, restricts the payment of dividends above 55% of consolidated net income, limits the incurrence of debt (excluding any amounts acquired in an acquisition) and prohibits the disposal of assets except in the ordinary course of business. Management believes the Company was in compliance with the financial and operational covenants at December 31, 2012. There was no outstanding balance under the line of credit as of December 31, 2012 or 2011.

7. INCOME TAXES:

The Company files a consolidated federal income tax return. Income tax expense is comprised of the following:

	Year Ended December 31,
	2012		2011		2010
Current federal income tax	$	23,605	$	21,727	$	19,625
Current state income tax		13		84		51
Deferred federal income tax expense (benefit)		1,517		2,005		1,089
Income tax expense	$	25,135	$	23,816	$	20,765

Income tax expense, as a percentage of pretax earnings, differs from the statutory federal income tax rate as follows:

	As a Percent of Pretax Earnings
	2012			2011			2010
Statutory federal income tax rate		35.0	%		35.0	%		35.0	%
Reductions in tax rate resulting from interest income exempt from federal income tax		(9.7	)		(9.3	)		(9.2	)
Effect of state income tax		0.1			0.1			0.1
ESOP tax credit		(0.3	)		(0.3	)		(0.3	)
Other		0.2			0.3			0.2
Effective income tax rate		25.3	%		25.8	%		25.8	%

F-25

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

The approximate effects of each type of difference that gave rise to the Company’s deferred tax assets and liabilities at December 31, 2012 and 2011 are as follows:

	2012			2011
Deferred tax assets:
Tax basis of loans in excess of financial statement basis	$	12,534		$	12,231
Minimum liability in defined benefit plan		4,502			3,954
Recognized for financial reporting purposes but not for tax purposes:
Deferred compensation		2,002			1,807
Write-downs and adjustments to other real estate owned and repossessed assets		148			538
Other deferred tax assets		255			306
Total deferred tax assets		19,441			18,836
Deferred tax liabilities:
Financial statement basis of fixed assets in excess of tax basis		5,678			5,204
Intangible asset amortization deductible for tax purposes, but not for financial reporting purposes		8,992			7,761
Recognized for financial reporting purposes but not for tax purposes:
Accretion on investment securities		1,563			2,129
Pension plan contributions		2,147			1,668
Net unrealized gain on investment securities Available-for-sale		32,130			29,383
Other deferred tax liabilities		389			433
Total deferred tax liabilities		50,899			46,578
Net deferred tax asset (liability)	$	(31,458	)	$	(27,742	)

Current authoritative accounting guidance prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of cumulative benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. Current authoritative accounting guidance also provides guidance on the accounting for and disclosure of unrecognized tax benefits, interest and penalties. The Company concluded the tax benefits of positions taken and expected to be taken on its tax returns should be recognized in the financial statements under this guidance. The Company files income tax returns in the U.S. federal jurisdiction and several U.S. state jurisdictions. We are no longer subject to U.S. federal income tax examinations by tax authorities for years before 2009 or Texas state tax examinations by tax authorities for years before 2011.

F-26

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

8. EXTRAORDINARY ITEM:

In the third quarter of 2010, the Company recorded income from an extraordinary item in the amount of $1.3 million, after income taxes, related to the expropriation of a portion of our real property. The Texas Department of Transportation (TXDOT) expropriated a portion of our real property at our Southlake bank location to expand highway access. TXDOT paid $2.2 million for land and damages to our existing property resulting in a net gain of $2.0 million before income taxes. As a result, our prior location’s accessibility significantly deteriorated and we constructed a new bank location in Southlake. We sold the prior Southlake location in August 2011.

9. FAIR VALUE DISCLOSURES:

The accounting authoritative guidance for fair value measurements defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs. 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 and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact.

The accounting authoritative guidance requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement costs). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, the accounting authoritative guidance establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

• Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

• Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (for example, interest rates, volatilities, prepayment speeds, loss severities, credit risks and default rates) or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3 Inputs – Significant unobservable inputs that reflect an entity’s own assumptions that market participants would use in pricing the assets or liabilities.

A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.

F-27

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

Securities classified as trading and available for sale are reported at fair value utilizing Level 1 and Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include market spreads, cash flows, the United States Treasury yield curve, live trading levels, trade execution data, dealer quotes, market consensus prepayments speeds, credit information and the security’s terms and conditions, among other items. Securities are considered to be measured with Level 1 inputs at the time of purchase and for 30 days following. After 30 days, the majority of securities are transferred to Level 2 as they are considered to be measured with Level 2 inputs, with the exception of U. S. Treasury securities and any other security for which there remain Level 1 inputs. Transfers are recognized on the actual date of transfer.

There were no transfers between Level 2 and Level 3 during the year ended December 31, 2012.

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of December 31, 2012, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available for sale investment securities:
U. S. Treasury securities	$	6,090	$	—	$	—	$	6,090
Obligations of U. S. government sponsored-enterprises and agencies		—		223,480		—		223,480
Obligations of state and political subdivisions		16,725		826,965		—		843,690
Corporate bonds		—		119,009		—		119,009
Mortgage-backed securities		—		622,584		—		622,584
Other securities		4,182		—		—		4,182
Total	$	26,997	$	1,792,038	$	—	$	1,819,035

Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis, that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). Financial assets and financial liabilities measured at fair value on a non-recurring basis include the following at December 31, 2012:

Impaired Loans – Impaired loans are reported at the fair value of the underlying collateral if repayment is expected solely from the collateral. Collateral values are estimated using Level 2 inputs based on observable market data or Level 3 input based on the discounting of the collateral. At December 31, 2012, impaired loans with a carrying value of $21,800,000 were reduced by specific valuation reserves totaling $6,010,000 resulting in a net fair value of $15,790,000.

Loans Held for Sale – Loans held for sale are reported at the lower of cost or fair value. In determining whether the fair value of loans held for sale is less than cost when quoted market prices are not available, the Company considers investor commitments/contracts. These loans are considered Level 2 of the fair value hierarchy. At December 31, 2012, the Company’s mortgage loans held for sale were recorded at cost as fair value exceeded cost.

F-28

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

Certain non-financial assets and non-financial liabilities measured at fair value on a non-recurring basis include other real estate owned, goodwill and other intangible assets and other non-financial long-lived assets. Non-financial assets measured at fair value on a non-recurring basis during the year ended December 31, 2012 and 2011 include other real estate owned which, subsequent to their initial transfer to other real estate owned from loans, were re-measured at fair value through a write-down included in gain (loss) on sale of foreclosed assets. During the reported periods, all fair value measurements for foreclosed assets utilized Level 2 inputs based on observable market data, generally third-party appraisals, or Level 3 inputs based on customized discounting criteria. These appraisals are evaluated individually and discounted as necessary due to the age of the appraisal, lack of comparable sales, expected holding periods of property or special use type of the property. Such discounts vary by appraisal based on the above factors but generally range from 5% to 25% of the appraised value. Reevaluation of other real estate owned is performed at least annually as required by regulatory guidelines or more often if particular circumstances arise. The following table presents other real estate owned that were re-measured subsequent to their initial transfer to other real estate owned (in thousands):

	Year Ended December 31,
	2012			2011
Carrying value of other real estate owned prior to remeasurement	$	5,375		$	7,064
Write-downs included in gain (loss) on sale of other real estate owned		(704	)		(1,522	)
Fair value	$	4,671		$	5,542

At December 31, 2012 and 2011, other real estate owned totaled $3,505,000 and $9,209,000, respectively.

The Company is required under current authoritative accounting guidance to disclose the estimated fair value of their financial instrument assets and liabilities including those subject to the requirements discussed above. For the Company, as for most financial institutions, substantially all of its assets and liabilities are considered financial instruments, as defined. Many of the Company’s financial instruments, however, lack an available trading market as characterized by a willing buyer and willing seller engaging in an exchange transaction.

The estimated fair value amounts of financial instruments have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to interpret data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a current market exchange. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

In addition, reasonable comparability between financial institutions may not be likely due to the wide range of permitted valuation techniques and numerous estimates which must be made given the absence of active secondary markets for many of the financial instruments. This lack of uniform valuation methodologies also introduces a greater degree of subjectivity to these estimated fair values.

Cash and due from banks, federal funds sold, interest bearing deposits and time deposits in banks and accrued interest receivable and payable are liquid in nature and considered Level 1 or 2 of the fair value hierarchy.

Financial instruments with stated maturities have been valued using a present value discounted cash flow with a discount rate approximating current market for similar assets and liabilities and are considered Levels 2 and 3 of the fair value hierarchy. Financial instrument liabilities with no stated maturities have an estimated fair value equal to both the amount payable on demand and the carrying value and are considered Level 1 of the fair value hierarchy.

The carrying value and the estimated fair value of the Company’s contractual off-balance-sheet unfunded lines of credit, loan commitments and letters of credit, which are generally priced at market at the time of funding, are not material.

F-29

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

The estimated fair values and carrying values of all financial instruments at December 31, 2012 and 2011, were as follows (in thousands):

	2012				2011
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Cash and due from banks	$	207,018	$	207,018	$	146,239	$	146,239
Federal funds sold		14,045		14,045		—		—
Interest-bearing deposits in banks		139,676		139,676		104,597		104,597
Interest-bearing time deposits in banks		49,005		49,288		61,175		61,175
Available for sale securities		1,819,035		1,819,035		1,841,389		1,841,389
Held to maturity securities		1,061		1,080		3,609		3,655
Loans		2,053,784		2,081,091		1,752,229		1,757,732
Accrued interest receivable		23,122		23,122		22,446		22,446
Deposits with stated maturities		637,040		638,227		752,298		754,186
Deposits with no stated maturities		2,995,544		2,995,544		2,582,500		2,582,500
Short-term borrowings		259,697		259,697		207,756		207,756
Accrued interest payable		287		287		594		594

F-30

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

10. COMMITMENTS AND CONTINGENCIES:

The Company is engaged in legal actions arising from the normal course of business. In management’s opinion, the Company has adequate legal defenses with respect to these actions, and as of December 31, 2012 the resolution of these matters is not expected to have material adverse effects upon the results of operations or financial condition of the Company.

The Company leases a portion of its bank premises and equipment under operating leases. At December 31, 2012, future minimum lease commitments were: 2013 – $821,000; 2014 – $608,000; 2015 – $524,000; 2016 – $466,000; 2017 – $279,000 and thereafter – $28,000.

11. FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK:

The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include unfunded lines of credit, commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets.

The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for unfunded lines of credit, commitments to extend credit and standby letters of credit is represented by the contractual notional amount of these instruments. The Company generally uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments.

	Contract or Notional Amount at December 31, 2012 (in thousands)
Financial instruments whose contract amounts represent credit risk:
Unfunded lines of credit	$	335,654
Unfunded commitments to extend credit		75,604
Standby letters of credit		19,985
	$	431,243

Unfunded lines of credit and commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, property, plant, and equipment, livestock, and income-producing commercial properties.

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The average collateral value held on letters of credit usually exceeds the contract amount.

The Company has no other significant off-balance sheet arrangements or transactions that would expose the Company to liability that is not reflected in the consolidated financial statements.

F-31

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

12. CONCENTRATION OF CREDIT RISK:

The Company grants commercial, retail, agriculture and residential real estate loans to customers primarily in North Central, Southeastern and West Texas. Although the Company has a diversified loan portfolio, a substantial portion of its borrowers’ ability to honor their commitments is dependent upon each local economic sector. In addition, the Company holds mortgage related securities which are backed by GNMA, FNMA or FHLMC or are collateralized by securities backed by these agencies.

13. PENSION AND PROFIT SHARING PLANS:

The Company’s defined benefit pension plan was frozen effective January 1, 2004 whereby no additional years of service will accrue to participants, unless the pension plan is reinstated at a future date. The pension plan covered substantially all of the Company’s employees. The benefits for each employee were based on years of service and a percentage of the employee’s qualifying compensation during the final years of employment. The Company’s funding policy was and is to contribute annually the amount necessary to satisfy the Internal Revenue Service’s funding standards. Contributions to the pension plan, prior to freezing the plan, were intended to provide not only for benefits attributed to service to date but also for those expected to be earned in the future. As a result of the Pension Protection Act of 2006, the Company will be required to contribute amounts in future years to fund any shortfalls. The Company has evaluated the provisions of the Act as well as the Internal Revenue Service’s funding standards to develop a plan for funding in future years. The Company made a contribution totaling $2.0 million and $1.5 million in 2012 and 2011, respectively, and is continuing to evaluate future funding amounts.

Using an actuarial measurement date of December 31, 2012 and 2011, respectively, benefit obligation activity and fair value of plan assets for the years ended December 31, 2012 and 2011, and a statement of the funded status as of December 31, 2012 and 2011, are as follows (in thousands):

	2012			2011
Reconciliation of benefit obligations:
Benefit obligation at January 1	$	24,608		$	22,263
Interest cost on projected benefit obligation		1,113			1,139
Actuarial loss		3,470			2,320
Benefits paid		(1,353	)		(1,114	)
Benefit obligation at December 31		27,838			24,608
Reconciliation of fair value of plan assets:
Fair value of plan assets at January 1	$	18,077		$	17,184
Actual return on plan assets		2,387			506
Employer contributions		2,000			1,500
Benefits paid		(1,354	)		(1,114	)
Fair value of plan assets at December 31		21,110			18,076
Funded status	$	(6,728	)	$	(6,532	)

Amounts recognized as a component of accumulated other comprehensive earnings as of year-end that have not been recognized as a component of the net period benefit cost of the Company’s defined benefit pension plan are as follows (in thousands):

	2012			2011
Net actuarial loss	$	(13,184	)	$	(11,620	)
Deferred tax benefit		4,824			4,277
Amounts included in accumulated other comprehensive earnings, net of tax	$	(8,360	)	$	(7,343	)

F-32

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

Current authoritative accounting guidance requires an employer to recognize the overfunded or underfunded status of defined benefit post-retirement benefit plans as an asset or a liability in its balance sheet. The funded status is measured as the difference between plan assets at fair value and the benefit obligation. An employer is also required to measure the funded status of a plan as of the date of its year-end statement of financial position with changes in the funded status recognized through comprehensive income. Current authoritative accounting guidance also requires certain disclosures regarding the effects on net periodic benefit cost for the next fiscal year that arise from delayed recognition of gains or losses.

Net periodic pension cost for the years ended December 31, 2012, 2011, and 2010, included (in thousands):

	Year Ended December 31,
	2012			2011			2010
Service cost - benefits earned during the period	$	—		$	—		$	—
Interest cost on projected benefit obligation		1,113			1,139			1,159
Expected return on plan assets		(1,140	)		(1,220	)		(1,092	)
Amortization of unrecognized net loss		659			434			416
Net periodic pension cost	$	632		$	353		$	483

The following table sets forth the rates used in the actuarial calculations of the present value of benefit obligations and net periodic pension cost and the rate of return on plan assets:

	2012			2011			2010
Weighted average discount rate		3.75	%		4.65	%		5.25	%
Expected long-term rate of return on assets		6.25	%		6.75	%		6.75	%

The expected long-term rate of return on plan assets is based on historical returns and expectations of future returns based on asset mix, after consultation with our investment advisors and actuaries. The weighted average discount rate is estimated based on setting a discount rate to establish an obligation for pension benefits equivalent to an amount that, if invested in high quality fixed income securities, would produce a return that matches the expected benefit payment stream.

The major type of plan assets in the pension plan and the targeted allocation percentage as of December 31, 2012 and 2011 is as follows:

	December 31, 2012 Allocation			December 31, 2011 Allocation			Targeted Allocation
Equity securities		74	%		82	%		75	%
Debt securities		24	%		16	%		25	%
Cash and equivalents		2	%		2	%		—

F-33

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

The range and weighted average final maturities of debt securities held in the pension plan as of December 31, 2012 are 1.75 to 8.67 years and approximately 4.24 years, respectively. Assets held in the pension are considered either Level 1 consisting of the publicly traded common stocks and publically traded mutual funds or Level 2 consisting of agency and corporate debt securities. There were no Level 3 securities. See note 9 for a discussion of the fair value hierarchy. The breakdown by level is as follows (in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Money market fund	$	513	$	—	$	—	$	513
Obligations of state and political subdivisions		—		708		—		708
Corporate bonds		—		1,833		—		1,833
Mortgage-backed securities		—		1,018		—		1,018
Corporate stocks and mutual funds		17,038		—		—		17,038
Total	$	17,551	$	3,559	$	—	$	21,110

First Financial Trust & Asset Management Company, National Association, a wholly owned subsidiary of the Company, manages the pension plan assets as well as the profit sharing plan assets (see below). The investment strategy and targeted allocations are based on similar strategies First Financial Trust & Asset Management Company, National Association employs for most of its managed accounts whereby appropriate diversification is achieved. First Financial Trust & Asset Management Company, National Association is prohibited from holding investments deemed to be high risk by the Office of the Comptroller of the Currency.

An estimate of the undiscounted projected future payments to eligible participants for the next five years and the following five years in the aggregate is as follows (in thousands):

Year Ending December 31,
2013	$	1,309
2014		1,393
2015		1,403
2016		1,412
2017		1,447
2018 to 2022	$	8,214

As of December 31, 2012 and 2011, the pension plan’s assets included Company common stock valued at approximately $1,202,000 and $1,030,000, respectively.

The Company also provides a profit sharing plan, which covers substantially all full-time employees. The profit sharing plan is a defined contribution plan and allows employees to contribute a percentage of their base annual salary. Employees are fully vested to the extent of their contributions and become fully vested in the Company’s contributions over a six-year vesting period. Costs related to the Company’s defined contribution plan totaled approximately $4,711,000, $4,688,000, and $4,299,000 in 2012, 2011 and 2010, respectively, and are included in salaries and employee benefits in the accompanying consolidated statements of earnings. As of December 31, 2012 and 2011, the profit sharing plan’s assets included Company common stock valued at approximately $29,043,000 and $25,715,000, respectively.

F-34

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

In 2004, after freezing our pension plan, we added a safe harbor match to the 401(k) plan. We match a maximum of 4% on employee deferrals of 5% of their employee compensation. Total expense for this matching in 2012, 2011 and 2010 was $1,383,000, $1,305,000 and $1,220,000, respectively, and is included in salaries and employee benefits in the statements of earnings.

The Company has a directors’ deferred compensation plan whereby the directors may elect to defer up to 100% of their directors’ fees. All deferred compensation is invested in the Company’s common stock held in a rabbi trust. The stock is held in nominee name of the trustee, and the principal and earnings of the trust are held separate and apart from other funds of the Company, and are used exclusively for the uses and purposes of the deferred compensation agreement. The accounts of the trust have been consolidated in the financial statements of the Company.

14. DIVIDENDS FROM SUBSIDIARIES:

At December 31, 2012, approximately $59,966,000 was available for the declaration of dividends by the Company’s subsidiaries without the prior approval of regulatory agencies.

15. REGULATORY MATTERS:

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

Quantitative measures established by regulation to ensure capital adequacy require the Company and each of its subsidiaries to maintain minimum amounts and ratios (set forth in the table below) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes as of December 31, 2012 and 2011, that Company and each of its subsidiaries meet all capital adequacy requirements to which they are subject.

As of December 31, 2012 and 2011, the most recent notification from each respective subsidiary’s primary regulator categorized each of the Company’s subsidiaries as well-capitalized. To be categorized as well-capitalized, the subsidiaries must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the following table.

F-35

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

There are no conditions or events since that notification that management believes have changed the institutions’ categories. Bankshares’ and its significant subsidiaries’ actual capital amounts and ratios are presented in the table below (in thousands):

											To Be Well
											Capitalized Under
						For Capital					Prompt Corrective
	Actual					Adequacy Purposes:					Action Provisions:
	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2012:
Total Capital (to Risk-Weighted Assets):
Consolidated	$	475,442		19	%	³$	203,620	³	8	%		N/A
First Financial Bank - Abilene	$	376,106		15	%	³$	202,391	³	8	%	³$	252,988	³	10	%
Tier1 Capital (to Risk-Weighted Assets):
Consolidated	$	443,481		17	%	³$	101,810	³	4	%		N/A
First Financial Bank - Abilene	$	344,335		14	%	³$	101,195	³	4	%	³$	151,793	³	6	%
Tier1 Capital (to Average Assets):
Consolidated	$	443,481		11	%	³$	125,558	³	3	%		N/A
First Financial Bank - Abilene	$	344,335		8	%	³$	125,413	³	3	%	³$	209,021	³	5	%

											To Be Well
											Capitalized Under
						For Capital					Prompt Corrective
	Actual					Adequacy Purposes:					Action Provisions:
	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2011:
Total Capital (to Risk-Weighted Assets):
Consolidated	$	426,532		19	%	³$	182,050	³	8	%		N/A
First Financial Bank - Abilene	$	110,120		15	%	³$	56,943	³	8	%	³$	71,179	³	10	%
First Financial Bank - San Angelo	$	38,744		18	%	³$	16,988	³	8	%	³$	21,235	³	10	%
First Financial Bank - Weatherford	$	33,975		16	%	³$	16,894	³	8	%	³$	21,117	³	10	%
First Financial Bank - Stephenville	$	33,062		14	%	³$	18,488	³	8	%	³$	23,109	³	10	%
First Financial Bank - Southlake	$	31,753		15	%	³$	16,570	³	8	%	³$	20,713	³	10	%
Tier1 Capital (to Risk-Weighted Assets):
Consolidated	$	397,916		17	%	³$	91,025	³	4	%		N/A
First Financial Bank - Abilene	$	103,002		14	%	³$	28,472	³	4	%	³$	42,707	³	6	%
First Financial Bank - San Angelo	$	36,237		17	%	³$	8,494	³	4	%	³$	12,741	³	6	%
First Financial Bank - Weatherford	$	31,309		15	%	³$	8,447	³	4	%	³$	12,670	³	6	%
First Financial Bank - Stephenville	$	30,143		13	%	³$	9,244	³	4	%	³$	13,866	³	6	%
First Financial Bank - Southlake	$	29,126		14	%	³$	8,285	³	4	%	³$	12,428	³	6	%
Tier1 Capital (to Average Assets):
Consolidated	$	397,916		10	%	³$	115,610	³	3	%		N/A
First Financial Bank - Abilene	$	103,002		8	%	³$	38,902	³	3	%	³$	64,837	³	5	%
First Financial Bank - San Angelo	$	36,237		9	%	³$	11,679	³	3	%	³$	19,465	³	5	%
First Financial Bank - Weatherford	$	31,309		8	%	³$	11,126	³	3	%	³$	18,544	³	5	%
First Financial Bank - Stephenville	$	30,143		9	%	³$	10,148	³	3	%	³$	16,914	³	5	%
First Financial Bank - Southlake	$	29,126		9	%	³$	9,225	³	3	%	³$	15,375	³	5	%

F-36

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

In connection with the First Financial Trust & Asset Management Company, N.A.’s (the “Trust Company”) application to obtain our trust charter, the Trust Company is required to maintain tangible net assets of $2,000,000 at all times. As of December 31, 2012, our Trust Company had tangible net assets totaling $5,099,000.

Our subsidiary bank may be required at times to maintain reserve balances with the Federal Reserve Bank. No such reserves were required at December 31, 2012 or December 31, 2011.

16. STOCK OPTION PLAN:

The Company has an incentive stock plan to provide for the granting of options to senior management of the Company at prices not less than market at the date of grant. At December 31, 2012, the Company had allocated 1,920,000 shares of stock for issuance under the plan. The plan provides that options granted are exercisable after two years from date of grant at a rate of 20% each year cumulatively during the 10-year term of the option. Shares are issued under the stock option plan from available authorized shares. An analysis of stock option activity for the year ended December 31, 2012 is presented in the table and narrative below:

	Shares			Weighted-Average Ex. Price		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value ($000)
Outstanding, beginning of year		481,024		$	29.11
Granted		—			—
Exercised		(37,246	)		22.13
Cancelled		(23,685	)		31.95
Outstanding, end of year		420,093		$	29.62		6.06	$	12,443
Exercisable at end of year		179,678		$	26.75		3.92	$	4,806

The options outstanding at December 31, 2012, had exercise prices ranging between $15.40 and $33.55. Stock options have been adjusted retroactively for the effects of stock dividends and splits.

The following table summarizes information concerning outstanding and vested stock options as of December 31, 2012:

Exercise Price	Number Outstanding		Remaining Contracted Life (Years)		Number Vested
$15.40		11,805		0.4		11,805
$22.05		53,319		2.1		53,319
$27.32		82,994		4.1		62,984
$33.55		125,925		6.4		50,370
$31.45		146,050		8.8		1,200

F-37

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

The fair value of the options granted in 2011 was estimated using the Black-Scholes options pricing model with the following weighted-average assumptions: risk-free interest rate of 1.34%; expected dividend yield of 2.88%; expected life of 5.93 years; and expected volatility of 26.92%.

The weighted-average grant-date fair value of options granted during the year ended December 31, 2011 was $5.94. There were no grants during 2012 and 2010. The total intrinsic value of options exercised during the years ended December 31, 2012, 2011, and 2010, was $510,000, $619,000, and $778,000, respectively.

As of December 31, 2012, there was $1,118,000 of total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan. That cost is expected to be recognized over a weighted-average period of 1.95 years. The total fair value of shares vested during the years ended December 31, 2012, 2011, and 2010 was $423,000, $369,000 and $213,000 respectively.

The aggregate intrinsic value of vested stock options at December 31, 2012 totaled $2,203,000.

F-38

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

17. CONDENSED FINANCIAL INFORMATION - PARENT COMPANY:

Condensed Balance Sheets-December 31, 2012 and 2011

	2012			2011
ASSETS
Cash in subsidiary bank	$	4,780		$	16,800
Cash in unaffiliated banks		2			2
Interest-bearing deposits in unaffiliated bank		—			5,026
Interest-bearing deposits in subsidiary bank		67,263			28,192
Total cash and cash equivalents		72,045			50,020
Interest-bearing time deposits in unaffiliated banks		3,078			2,118
Securities available-for-sale, at fair value		12,706			17,729
Investment in and advances to subsidiaries, at equity		468,502			446,320
Intangible assets		723			723
Other assets		1,961			2,009
Total assets	$	559,015		$	518,919
LIABILITIES AND SHAREHOLDERS’ EQUITY
Total liabilities	$	2,052		$	10,382
Shareholders’ equity:
Common stock		315			315
Capital surplus		277,412			276,126
Retained earnings		227,927			184,871
Treasury shares		(5,007	)		(4,597	)
Deferred compensation		5,007			4,597
Accumulated other comprehensive earnings		51,309			47,225
Total shareholders’ equity		556,963			508,537
Total liabilities and shareholders’ equity	$	559,015		$	518,919

Condensed Statements of Earnings-

For the Years Ended December 31, 2012, 2011 and 2010

	2012		2011		2010
Income:
Cash dividends from subsidiaries	$	58,400	$	47,350	$	41,050
Excess of earnings over dividends of subsidiary bank		17,547		22,722		20,149
Other income		2,682		2,435		1,991
		78,629		72,507		63,190
Expenses:
Salaries and employee benefits		3,668		3,493		2,833
Other operating expenses		2,338		2,199		2,068
		6,006		5,692		4,901
Earnings before income taxes		72,623		66,815		58,289
Income tax benefit		1,602		1,554		1,370
Net earnings	$	74,225	$	68,369	$	59,659

F-39

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

Condensed Statements of Cash Flows-

For the Years Ended December 31, 2012, 2011, and 2010

	2012			2011			2010
Cash flows from operating activities:
Net earnings	$	74,225		$	68,369		$	59,659
Adjustments to reconcile net earnings to net cash provided by operating activities:
Excess of earnings over dividends of subsidiary bank		(17,547	)		(22,722	)		(20,149	)
Depreciation and amortization, net		142			187			171
Decrease in other assets		34			396			10
Increase (decrease) in liabilities		(918	)		774			(29	)
Net cash provided by operating activities		55,936			47,004			39,662
Cash flows from investing activities:
Acquisition of bank		—			—			(18,200	)
Net decrease (increase) in interest-bearing time deposits in unaffiliated banks		(960	)		2,160			(198	)
Purchase of available for sale securities		—			(5,756	)		(5,649	)
Maturities of available for sale securities		5,430			2,500			2,500
Purchases of bank premises and equipment		(86	)		(204	)		(59	)
Repayment from (of advances related to) investment in and advances to subsidiaries, net		(400	)		820			(200	)
Net cash used in (provided by) investing activities		3,984			(480	)		(21,806	)
Cash flows from financing activities:
Proceeds of stock issuances		824			950			790
Cash dividends paid		(38,719	)		(29,359	)		(28,346	)
Net cash used in financing activities		(37,895	)		(28,409	)		(27,556	)
Net increase (decrease) in cash and cash equivalents		22,025			18,115			(9,700	)
Cash and cash equivalents, beginning of year		50,020			31,905			41,605
Cash and cash equivalents, end of year	$	72,045		$	50,020		$	31,905

In connection with the Company’s Federal Housing Administration (FHA) mortgage loan originations, the parent company has executed a corporate guarantee agreement in which the parent company guarantees the ongoing FHA net worth and liquidity compliance of First Financial Bank, N.A., Abilene.

F-40

FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

December 31, 2012, 2011 and 2010

18. CASH FLOW INFORMATION:

Supplemental information on cash flows and noncash transactions is as follows (in thousands):

	Year Ended December 31,
	2012		2011		2010
Supplemental cash flow information:
Interest paid	$	5,419	$	8,664	$	13,802
Federal income taxes paid		20,779		18,942		18,844
Schedule of noncash investing and financing activities:
Assets acquired through foreclosure		2,459		6,013		11,017
Investment securities purchased but not settled		8,589		21,325		14,945

19. SUBSEQUENT EVENT (UNAUDITED):

On February 20, 2013, the Company announced that it has entered into a definitive agreement to acquire Orange Savings Bank, SSB in Orange, Texas for an expected combination of cash and stock purchase price of approximately $56.0 million. Pending regulatory and shareholder approval, the acquisition is expected to be finalized in the second quarter of 2013.

F-41

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF REGISTRANT

Names of Subsidiary	Place of Organization	Percentage of Voting Securities Owned
First Financial Investments, Inc.	Texas		100	%
First Technology Services, Inc.	Texas		100	%
Abilene, Texas
First Financial Trust & Asset Management	Texas		100	%
Company, National Association*
Abilene, Texas
First Financial Bank, National Association*	Texas		100	%
Abilene, Texas
First Financial Insurance Agency, Inc.	Texas		100	%
Abilene, Texas

* National charter.

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-114121) pertaining to the 2002 Incentive Stock Option Plan for Key Employees of First Financial Bankshares, Inc. of our reports dated February 22, 2013, with respect to the consolidated financial statements of First Financial Bankshares, Inc. and subsidiaries, and the effectiveness of internal control over financial reporting of First Financial Bankshares, Inc. and subsidiaries, included in this Annual Report (Form 10-K) for the year ended December 31, 2012.

/s/ Ernst & Young LLP

Dallas, Texas

February 22, 2013

EX-31.1

Exhibit 31.1

Certification of

Chief Executive Officer

of First Financial Bankshares, Inc.

I, F. Scott Dueser, Chairman of the Board, President and Chief Executive Officer of First Financial Bankshares, Inc., certify that:

1. I have reviewed this Form 10-K of First Financial Bankshares, 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 that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

5. The registrant’s other certifying officers 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 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 22, 2013

By:	/s/ F. SCOTT DUESER
	F. Scott Dueser
	Chairman of the Board, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification of

Chief Financial Officer

of First Financial Bankshares, Inc.

I, J. Bruce Hildebrand, Executive Vice President and Chief Financial Officer of First Financial Bankshares, Inc., certify that:

1. I have reviewed this Form 10-K of First Financial Bankshares, 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 that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

5. The registrant’s other certifying officers 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 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 22, 2013

By:	/s/ J. Bruce Hildebrand
	J. Bruce Hildebrand
	Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of

Chief Executive Officer

of First Financial Bankshares, Inc.

This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States code) and accompanies the annual report on Form 10-K (the “Form 10-K”) for the year ended December 31, 2012 of First Financial Bankshares, Inc.

I, F. Scott Dueser, the Chairman of the Board, President and Chief Executive Officer of the Issuer certify that:

1. the Form 10-K fully complies with the requirements of section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

2. the information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: February 22, 2013

By:	/s/ F. SCOTT DUESER
	F. Scott Dueser
	Chairman of the Board, President and Chief Executive Officer

Subscribed and sworn to before me this 22nd day of February, 2013.

/s/ Vickie L. Sadler

Vickie L. Sadler

Notary Public

My commission expires: November 25, 2014

EX-32.2

Exhibit 32.2

Certification of

Chief Financial Officer

of First Financial Bankshares, Inc.

This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States code) and accompanies the annual report on Form 10-K (the “Form 10-K”) for the year ended December 31, 2012 of First Financial Bankshares, Inc.

I, J. Bruce Hildebrand, the Executive Vice President and Chief Financial Officer of the Issuer certify that:

1. the Form 10-K fully complies with the requirements of section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

2. the information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: February 22, 2013

By:	/s/ J. Bruce Hildebrand
	J. Bruce Hildebrand
	Chief Financial Officer

Subscribed and sworn to before me this 22nd day of February, 2013.

/s/ Vickie L. Sadler

Vickie L. Sadler

Notary Public

My commission expires: November 25, 2014

XML

Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Actual Capital Amounts and Ratios

											To Be Well
											Capitalized Under
						For Capital					Prompt Corrective
	Actual					Adequacy Purposes:					Action Provisions:
	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2012:
Total Capital (to Risk-Weighted Assets):
Consolidated	$	475,442		19	%	³$	203,620	³	8	%		N/A
First Financial Bank - Abilene	$	376,106		15	%	³$	202,391	³	8	%	³$	252,988	³	10	%
Tier1 Capital (to Risk-Weighted Assets):
Consolidated	$	443,481		17	%	³$	101,810	³	4	%		N/A
First Financial Bank - Abilene	$	344,335		14	%	³$	101,195	³	4	%	³$	151,793	³	6	%
Tier1 Capital (to Average Assets):
Consolidated	$	443,481		11	%	³$	125,558	³	3	%		N/A
First Financial Bank - Abilene	$	344,335		8	%	³$	125,413	³	3	%	³$	209,021	³	5	%

											To Be Well
											Capitalized Under
						For Capital					Prompt Corrective
	Actual					Adequacy Purposes:					Action Provisions:
	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2011:
Total Capital (to Risk-Weighted Assets):
Consolidated	$	426,532		19	%	³$	182,050	³	8	%		N/A
First Financial Bank - Abilene	$	110,120		15	%	³$	56,943	³	8	%	³$	71,179	³	10	%
First Financial Bank - San Angelo	$	38,744		18	%	³$	16,988	³	8	%	³$	21,235	³	10	%
First Financial Bank - Weatherford	$	33,975		16	%	³$	16,894	³	8	%	³$	21,117	³	10	%
First Financial Bank - Stephenville	$	33,062		14	%	³$	18,488	³	8	%	³$	23,109	³	10	%
First Financial Bank - Southlake	$	31,753		15	%	³$	16,570	³	8	%	³$	20,713	³	10	%
Tier1 Capital (to Risk-Weighted Assets):
Consolidated	$	397,916		17	%	³$	91,025	³	4	%		N/A
First Financial Bank - Abilene	$	103,002		14	%	³$	28,472	³	4	%	³$	42,707	³	6	%
First Financial Bank - San Angelo	$	36,237		17	%	³$	8,494	³	4	%	³$	12,741	³	6	%
First Financial Bank - Weatherford	$	31,309		15	%	³$	8,447	³	4	%	³$	12,670	³	6	%
First Financial Bank - Stephenville	$	30,143		13	%	³$	9,244	³	4	%	³$	13,866	³	6	%
First Financial Bank - Southlake	$	29,126		14	%	³$	8,285	³	4	%	³$	12,428	³	6	%
Tier1 Capital (to Average Assets):
Consolidated	$	397,916		10	%	³$	115,610	³	3	%		N/A
First Financial Bank - Abilene	$	103,002		8	%	³$	38,902	³	3	%	³$	64,837	³	5	%
First Financial Bank - San Angelo	$	36,237		9	%	³$	11,679	³	3	%	³$	19,465	³	5	%
First Financial Bank - Weatherford	$	31,309		8	%	³$	11,126	³	3	%	³$	18,544	³	5	%
First Financial Bank - Stephenville	$	30,143		9	%	³$	10,148	³	3	%	³$	16,914	³	5	%
First Financial Bank - Southlake	$	29,126		9	%	³$	9,225	³	3	%	³$	15,375	³	5	%

XML

Loans and Allowance for Loan Losses - Schedule of Impaired Loans and Related Allowance (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	$ 26,170	$ 23,587
Recorded Investment With No Allowance	2,184	1,818
Recorded Investment With Allowance	19,616	18,157
Total Recorded Investment	21,800	19,975
Related Allowance	6,010	5,953
Average Recorded Investment	24,025	22,348	17,242
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	2,677	3,856
Recorded Investment With No Allowance	20
Recorded Investment With Allowance	2,231	3,450
Total Recorded Investment	2,251	3,450
Related Allowance	1,350	2,092
Average Recorded Investment	2,966	3,801
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	381	199
Recorded Investment With No Allowance		3
Recorded Investment With Allowance	372	142
Total Recorded Investment	372	145
Related Allowance	131	79
Average Recorded Investment	437	246
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	22,569	19,305
Recorded Investment With No Allowance	2,049	1,786
Recorded Investment With Allowance	16,649	14,407
Total Recorded Investment	18,698	16,193
Related Allowance	4,356	3,708
Average Recorded Investment	20,164	18,068
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Contractual Principal Balance	543	227
Recorded Investment With No Allowance	115	29
Recorded Investment With Allowance	364	158
Total Recorded Investment	479	187
Related Allowance	173	74
Average Recorded Investment	$ 458	$ 233

XML

Interest-Bearing Time Deposits in Banks and Securities - Continuous Unrealized-Loss Position of Available-For-Sale and Held-To-Maturity Securities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value	$ 71,271	$ 43,964
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	853	446
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value	3,574
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	42
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value	74,845	43,964
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss	895	446
Obligations of U.S. government sponsored-enterprises and agencies [Member]
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value		3,114
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss		4
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value		3,114
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss		4
Obligations of state and political subdivisions [Member]
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value	36,480	9,595
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	129	98
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value	36,480	9,595
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss	129	98
Residential mortgage-backed securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value	17,344	13,722
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	401	89
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value	3,574
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss	42
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value	20,918	13,722
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss	443	89
Corporate Bonds And Other [Member]
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value	4,994	17,533
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	73	255
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value	4,994	17,533
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss	73	255
Commercial mortgage-backed securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Fair Value	12,453
Available-for-sale and held-to-maturity securities, continuous unrealized loss position Less than 12 Months, Unrealized Loss	250
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Fair Value
Available-for-sale and held-to-maturity securities, continuous unrealized loss position 12 Months or Longer, Unrealized Loss
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Fair Value	12,453
Available-for-sale and held-to-maturity securities, continuous unrealized loss position, Unrealized Loss	$ 250

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Income Taxes - Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Expenses [Line Items]
Current federal income tax	$ 23,605	$ 21,727	$ 19,625
Current state income tax	13	84	51
Deferred federal income tax expense (benefit)	(1,517)	2,005	1,089
Income tax expense	$ 25,135	$ 23,816	$ 20,765

XML

Loans and Allowance for Loan Losses - Schedule of Internal Ratings of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	$ 2,077,166	$ 1,775,915
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	509,609	454,087
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	68,306	68,122
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	1,226,823	1,041,396
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	272,428	212,310
Pass [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	2,010,029	1,688,602
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	498,188	432,110
Pass [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	64,397	65,007
Pass [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	1,176,330	980,308
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	271,114	211,177
Special Mention [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	17,597	30,798
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	2,193	9,227
Special Mention [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	342	347
Special Mention [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	14,680	20,922
Special Mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	382	302
Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	49,341	56,391
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	9,198	12,748
Substandard [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	3,559	2,755
Substandard [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	35,673	40,068
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	911	820
Doubtful [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	199	124
Doubtful [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	30	2
Doubtful [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	8	13
Doubtful [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	140	98
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Internal ratings of loan	$ 21	$ 11

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Fair Value Disclosures - Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 207,018	$ 146,239
Federal funds sold	14,045
INTEREST-BEARING DEPOSITS IN BANKS	139,676	104,597
INTEREST-BEARING TIME DEPOSITS IN BANKS	49,005	61,175
Available for sale securities	1,819,035	1,841,389
Held to maturity securities	1,061	3,609
Loans	2,053,784	1,752,229
Short-term borrowings	259,697	207,756
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	207,018	146,239
Federal funds sold	14,045
INTEREST-BEARING DEPOSITS IN BANKS	139,676	104,597
INTEREST-BEARING TIME DEPOSITS IN BANKS	49,005	61,175
Available for sale securities	1,819,035	1,841,389
Held to maturity securities	1,061	3,609
Loans	2,053,784	1,752,229
Accrued interest receivable	23,122	22,446
Deposits with stated maturities	637,040	752,298
Deposits with no stated maturities	2,995,544	2,582,500
Short-term borrowings	259,697	207,756
Accrued interest payable	287	594
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	207,018	146,239
Federal funds sold	14,045
INTEREST-BEARING DEPOSITS IN BANKS	139,676	104,597
INTEREST-BEARING TIME DEPOSITS IN BANKS	49,288	61,175
Available for sale securities	1,819,035	1,841,389
Held to maturity securities	1,080	3,655
Loans	2,081,091	1,757,732
Accrued interest receivable	23,122	22,446
Deposits with stated maturities	638,227	754,186
Deposits with no stated maturities	2,995,544	2,582,500
Short-term borrowings	259,697	207,756
Accrued interest payable	$ 287	$ 594

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Interest-Bearing Time Deposits in Banks and Securities - Summary of Available-for-Sale and Held-to-Maturity Securities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	$ 1,727,237	$ 1,757,442
Securities available-for-sale, Gross Unrealized Holding Gains	92,693	84,393
Securities available-for-sale, Gross Unrealized Holding Losses	(895)	(446)
Securities Available-for-sale, at fair value	1,819,035	1,841,389
Securities held-to-maturity, Amortized Cost Basis	1,061	3,609
Securities held-to-maturity, Gross Unrealized Holding Gains	19	46
Securities held-to-maturity, Gross Unrealized Holding Losses
Securities held-to-maturity, Estimated Fair Value	1,080	3,655
U.S. Treasury securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	6,042	15,143
Securities available-for-sale, Gross Unrealized Holding Gains	48	204
Securities available-for-sale, Gross Unrealized Holding Losses
Securities Available-for-sale, at fair value	6,090	15,347
Obligations of U.S. government sponsored-enterprises and agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	219,420	255,548
Securities available-for-sale, Gross Unrealized Holding Gains	4,060	5,802
Securities available-for-sale, Gross Unrealized Holding Losses		(4)
Securities Available-for-sale, at fair value	223,480	261,346
Obligations of state and political subdivisions [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	786,278	655,957
Securities available-for-sale, Gross Unrealized Holding Gains	57,541	48,812
Securities available-for-sale, Gross Unrealized Holding Losses	(129)	(98)
Securities Available-for-sale, at fair value	843,690	704,671
Securities held-to-maturity, Amortized Cost Basis	735	3,187
Securities held-to-maturity, Gross Unrealized Holding Gains	7	30
Securities held-to-maturity, Gross Unrealized Holding Losses
Securities held-to-maturity, Estimated Fair Value	742	3,217
Corporate Bonds and Other [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	117,244	127,514
Securities available-for-sale, Gross Unrealized Holding Gains	6,020	4,215
Securities available-for-sale, Gross Unrealized Holding Losses	(73)	(255)
Securities Available-for-sale, at fair value	123,191	131,474
Residential mortgage-backed securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	564,434	681,277
Securities available-for-sale, Gross Unrealized Holding Gains	23,285	24,247
Securities available-for-sale, Gross Unrealized Holding Losses	(443)	(89)
Securities Available-for-sale, at fair value	587,276	705,435
Securities held-to-maturity, Amortized Cost Basis	294	358
Securities held-to-maturity, Gross Unrealized Holding Gains	11	14
Securities held-to-maturity, Gross Unrealized Holding Losses
Securities held-to-maturity, Estimated Fair Value	305	372
Commercial mortgage-backed securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Securities available-for-sale, Amortized Cost Basis	33,819	22,003
Securities available-for-sale, Gross Unrealized Holding Gains	1,739	1,113
Securities available-for-sale, Gross Unrealized Holding Losses	(250)
Securities Available-for-sale, at fair value	35,308	23,116
Securities held-to-maturity, Amortized Cost Basis	32	64
Securities held-to-maturity, Gross Unrealized Holding Gains	1	2
Securities held-to-maturity, Gross Unrealized Holding Losses
Securities held-to-maturity, Estimated Fair Value	$ 33	$ 66

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Bank Premises and Equipment (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Bank Premises and Equipment

The following is a summary of bank premises and equipment (in thousands):

	Useful Life	December 31,
		2012			2011
Land	—	$	19,024		$	17,542
Buildings	20 to 40 years		81,988			76,822
Furniture and equipment	3 to 10 years		47,921			42,844
Leasehold improvements	Lesser of lease term or 5 to 15 years		4,137			3,991
			153,070			141,199
Less- accumulated depreciation and amortization			(68,948	)		(64,716	)
		$	84,122		$	76,483

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Commitments and Contingencies - Additional Information (Detail) (USD $)	Dec. 31, 2012
Future Contractual Minimum Rental Revenues On Leases [Line Items]
Future minimum lease commitments, 2013	$ 821,000
Future minimum lease commitments, 2014	608,000
Future minimum lease commitments, 2015	524,000
Future minimum lease commitments, 2016	466,000
Future minimum lease commitments, 2017	279,000
Future minimum lease commitments, thereafter	$ 28,000

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Income Taxes - Additional Information (Detail)	Dec. 31, 2012
Income Taxes [Line Items]
Tax position measured if more-likely-than-not threshold is exceeded, percentage	50.00%

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Dividends from Subsidiaries - Additional Information (Detail) (USD $)	Dec. 31, 2012
Equity [Line Items]
Amount available for the declaration of dividends by subsidiary banks without prior approval of regulatory agencies	$ 59,966,000

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Loans and Allowance for Loan Losses - Allowance for Loan Losses by Estimating Probable Losses in Various Categories of Loan Portfolio (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Adequacy Of Allowance For Loan Losses By Estimating Probable Losses In Various Categories Of Loan Portfolio [Line Items]
Loans specifically evaluated as impaired	$ 6,010	$ 5,953
Remaining portfolio	28,829	28,362
Total allowance for loan losses	$ 34,839	$ 34,315	$ 31,106

XML

Fair Value Disclosures - Additional Information (Detail) (USD $)			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum [Member]
Fair Value Inputs Assets And Liabilities Quantitative Information [Line Items]
Impaired loans carrying value	$ 21,800,000
Impaired loans valuation reserves	6,010,000
Impaired loans net fair value	15,790,000
Debt discount, percentage			5.00%	25.00%
Other real estate owned, total	$ 3,505,000	$ 9,209,000

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Pension and Profit Sharing Plans - Pension Plan and Targeted Allocation Percentage (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Equity securities [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Allocation	74.00%	82.00%
Targeted Allocation	75.00%
Debt securities [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Allocation	24.00%	16.00%
Targeted Allocation	25.00%
Cash and equivalents [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Allocation	2.00%	2.00%

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Pension and Profit Sharing Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012 Y	Dec. 31, 2011	Dec. 31, 2010
Pension And Profit Sharing Plans [Line Items]
Contributions towards pension plan	$ 2,000,000	$ 1,500,000
Weighted average final maturities of debt securities held in the pension plan, Years	4.24
Level 3 securities	0
Common stock value	315,000	314,000
Vesting period	6 years
Defined contribution plan cost	4,711,000	4,688,000	4,299,000
Employee deferrals	4.00%
Employee compensation	5.00%
Directors' fees	100.00%
Pension plan's assets [Member]
Pension And Profit Sharing Plans [Line Items]
Common stock value	1,202,000	1,030,000
Profit sharing plan's assets [Member]
Pension And Profit Sharing Plans [Line Items]
Common stock value	29,043,000	25,715,000
Safe harbor 401(k) plan [Member]
Pension And Profit Sharing Plans [Line Items]
Total expense	$ 1,383,000	$ 1,305,000	$ 1,220,000
Minimum [Member]
Pension And Profit Sharing Plans [Line Items]
Weighted average final maturities of debt securities held in the pension plan, Years	1.75
Maximum [Member]
Pension And Profit Sharing Plans [Line Items]
Weighted average final maturities of debt securities held in the pension plan, Years	8.67

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Pension and Profit Sharing Plans - Breakdown by Level (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	$ 21,110
Money market fund [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	513
Obligations of state and political subdivisions [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	708
Corporate bonds [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	1,833
Mortgage-backed securities [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	1,018
Corporate stocks and mutual funds [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	17,038
Level 1 Inputs [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	17,551
Level 1 Inputs [Member] | Money market fund [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	513
Level 1 Inputs [Member] | Obligations of state and political subdivisions [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 1 Inputs [Member] | Corporate bonds [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 1 Inputs [Member] | Mortgage-backed securities [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 1 Inputs [Member] | Corporate stocks and mutual funds [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	17,038
Level 2 Inputs [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	3,559
Level 2 Inputs [Member] | Money market fund [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 2 Inputs [Member] | Obligations of state and political subdivisions [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	708
Level 2 Inputs [Member] | Corporate bonds [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	1,833
Level 2 Inputs [Member] | Mortgage-backed securities [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value	1,018
Level 2 Inputs [Member] | Corporate stocks and mutual funds [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 3 Inputs [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 3 Inputs [Member] | Money market fund [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 3 Inputs [Member] | Obligations of state and political subdivisions [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 3 Inputs [Member] | Corporate bonds [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 3 Inputs [Member] | Mortgage-backed securities [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value
Level 3 Inputs [Member] | Corporate stocks and mutual funds [Member]
Pension And Profit Sharing Plans [Line Items]
Total Fair Value

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Fair Value Disclosures - Other Real Estate Owned (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Summary Of Activity Related To Other Real Estate Owned [Line Items]
Carrying value of other real estate owned prior to re-measurement	$ 5,375	$ 7,064
Write-downs included in gain (loss) on sale of other real estate owned	(704)	(1,522)
Fair value	$ 4,671	$ 5,542

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Income Taxes - Percentage of Pretax Earnings, Differs from the Statutory Federal Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Rate Reconciliation [Line Items]
Statutory federal income tax rate	35.00%	35.00%	35.00%
Reductions in tax rate resulting from interest income exempt from federal income tax	(9.70%)	(9.30%)	(9.20%)
Effect of state income tax	0.10%	0.10%	0.10%
ESOP tax credit	(0.30%)	(0.30%)	(0.30%)
Other	0.20%	0.30%	0.20%
Effective income tax rate	25.30%	25.80%	25.80%

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Stock Option Plan

12 Months Ended

Dec. 31, 2012

Stock Option Plan

16. STOCK OPTION PLAN:

The Company has an incentive stock plan to provide for the granting of options to senior management of the Company at prices not less than market at the date of grant. At December 31, 2012, the Company had allocated 1,920,000 shares of stock for issuance under the plan. The plan provides that options granted are exercisable after two years from date of grant at a rate of 20% each year cumulatively during the 10-year term of the option. Shares are issued under the stock option plan from available authorized shares. An analysis of stock option activity for the year ended December 31, 2012 is presented in the table and narrative below:

	Shares			Weighted-Average Ex. Price		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value ($000)
Outstanding, beginning of year		481,024		$	29.11
Granted		—			—
Exercised		(37,246	)		22.13
Cancelled		(23,685	)		31.95
Outstanding, end of year		420,093		$	29.62		6.06	$	12,443
Exercisable at end of year		179,678		$	26.75		3.92	$	4,806

The options outstanding at December 31, 2012, had exercise prices ranging between $15.40 and $33.55. Stock options have been adjusted retroactively for the effects of stock dividends and splits.

The following table summarizes information concerning outstanding and vested stock options as of December 31, 2012:

Exercise Price	Number Outstanding		Remaining Contracted Life (Years)		Number Vested
$15.40		11,805		0.4		11,805
$22.05		53,319		2.1		53,319
$27.32		82,994		4.1		62,984
$33.55		125,925		6.4		50,370
$31.45		146,050		8.8		1,200

The fair value of the options granted in 2011 was estimated using the Black-Scholes options pricing model with the following weighted-average assumptions: risk-free interest rate of 1.34%; expected dividend yield of 2.88%; expected life of 5.93 years; and expected volatility of 26.92%.

The weighted-average grant-date fair value of options granted during the year ended December 31, 2011 was $5.94. There were no grants during 2012 and 2010. The total intrinsic value of options exercised during the years ended December 31, 2012, 2011, and 2010, was $510,000, $619,000, and $778,000, respectively.

As of December 31, 2012, there was $1,118,000 of total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan. That cost is expected to be recognized over a weighted-average period of 1.95 years. The total fair value of shares vested during the years ended December 31, 2012, 2011, and 2010 was $423,000, $369,000 and $213,000 respectively.

The aggregate intrinsic value of vested stock options at December 31, 2012 totaled $2,203,000.

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Loans and Allowance for Loan Losses - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012 Contract	Dec. 31, 2011	Dec. 31, 2010
Summary Of Allowance For Loan Losses On Impaired Loans [Line Items]
Loans held for sale	$ 11,457,000	$ 10,629,000
Average recorded investment in impaired loans	24,025,000	22,348,000	17,242,000
Nonaccrual loans still accruing, past due 90 days, restructured loans and foreclosed assets	25,462,000	29,535,000
Non-accrual loans	21,800,000	19,975,000
Interest income recognized on impaired loans	384,000	1,137,000	425,000
Number of loans	8
Default for purposes of this disclosure is a troubled debt restructured loan	90 days
Loans held by subsidiaries subject to blanket liens	223,678,000
Letters of credit outstanding, amount	$ 87,700,000

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Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2012

Supplemental Information on Cash Flows and Noncash Transactions

Supplemental information on cash flows and noncash transactions is as follows (in thousands):

	Year Ended December 31,
	2012		2011		2010
Supplemental cash flow information:
Interest paid	$	5,419	$	8,664	$	13,802
Federal income taxes paid		20,779		18,942		18,844
Schedule of noncash investing and financing activities:
Assets acquired through foreclosure		2,459		6,013		11,017
Investment securities purchased but not settled		8,589		21,325		14,945

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Fair Value Disclosures - Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	$ 1,819,035
U.S. Treasury securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	6,090
Obligations of U.S. government sponsored-enterprises and agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	223,480
Obligations of state and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	843,690
Corporate Bonds and Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	119,009
Mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	622,584
Collateralized Securities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	4,182
Level 1 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	26,997
Level 1 Inputs [Member] | U.S. Treasury securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	6,090
Level 1 Inputs [Member] | Obligations of U.S. government sponsored-enterprises and agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 1 Inputs [Member] | Obligations of state and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	16,725
Level 1 Inputs [Member] | Corporate Bonds and Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 1 Inputs [Member] | Mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 1 Inputs [Member] | Collateralized Securities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	4,182
Level 2 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	1,792,038
Level 2 Inputs [Member] | U.S. Treasury securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 2 Inputs [Member] | Obligations of U.S. government sponsored-enterprises and agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	223,480
Level 2 Inputs [Member] | Obligations of state and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	826,965
Level 2 Inputs [Member] | Corporate Bonds and Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	119,009
Level 2 Inputs [Member] | Mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value	622,584
Level 2 Inputs [Member] | Collateralized Securities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 3 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 3 Inputs [Member] | U.S. Treasury securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Obligations of U.S. government sponsored-enterprises and agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Obligations of state and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Corporate Bonds and Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value
Level 3 Inputs [Member] | Collateralized Securities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investment securities, Total Fair Value

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Condensed Financial Information - Parent Company - Condensed Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net earnings	$ 74,225	$ 68,369	$ 59,659
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization, net	7,920	7,352	7,102
Decrease in other assets	(5,170)	(1,075)	4,573
Increase (decrease) in liabilities	1,818	1,132	(2,415)
Net cash provided by operating activities	93,062	95,111	71,828
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of bank			(2,463)
Purchase of available for sale securities	(2,049,275)	(2,171,404)	(2,068,639)
Maturities of available for securities	1,909,635	1,886,632	1,812,241
Purchases of bank premises and equipment	(16,180)	(14,777)	(11,240)
Net cash used in (provided by) investing activities	(294,991)	(331,030)	(355,808)
Cash flows from financing activities:
Proceeds of stock issuances	824	950	789
Cash dividends paid	(38,719)	(29,359)	(28,346)
Net cash provided by (used in) financing activities	311,832	222,488	283,329
Net increase (decrease) in cash and cash equivalents	109,903	(13,431)	(651)
CASH AND CASH EQUIVALENTS, beginning of year	250,836	264,267	264,918
Cash and cash equivalents, end of year	360,739	250,836	264,267
Parent company [Member]
Cash flows from operating activities:
Net earnings	74,225	68,369	59,659
Adjustments to reconcile net earnings to net cash provided by operating activities:
Excess of earnings over dividends of subsidiary bank	(17,547)	(22,722)	(20,149)
Depreciation and amortization, net	142	187	171
Decrease in other assets	34	396	10
Increase (decrease) in liabilities	(918)	774	(29)
Net cash provided by operating activities	55,936	47,004	39,662
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of bank			(18,200)
Net decrease (increase) in interest-bearing time deposits in unaffiliated banks	(960)	2,160	(198)
Purchase of available for sale securities		(5,756)	(5,649)
Maturities of available for securities	5,430	2,500	2,500
Purchases of bank premises and equipment	(86)	(204)	(59)
Repayment from (of advances related to) investment in and advances to subsidiaries, net	(400)	820	(200)
Net cash used in (provided by) investing activities	3,984	(480)	(21,806)
Cash flows from financing activities:
Proceeds of stock issuances	824	950	790
Cash dividends paid	(38,719)	(29,359)	(28,346)
Net cash provided by (used in) financing activities	(37,895)	(28,409)	(27,556)
Net increase (decrease) in cash and cash equivalents	22,025	18,115	(9,700)
CASH AND CASH EQUIVALENTS, beginning of year	50,020	31,905	41,605
Cash and cash equivalents, end of year	$ 72,045	$ 50,020	$ 31,905

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Financial Instruments with Off-Balance-Sheet Risk (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Financial Instruments with Off-Balance-Sheet Risk

The Company generally uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments.

	Contract or Notional Amount at December 31, 2012 (in thousands)
Financial instruments whose contract amounts represent credit risk:
Unfunded lines of credit	$	335,654
Unfunded commitments to extend credit		75,604
Standby letters of credit		19,985
	$	431,243

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Loans and Allowance for Loan Losses - Recorded Investment in Impaired Loans and Related Valuation Allowance (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Recorded Investment	$ 21,800	$ 19,975
Valuation Allowance	$ 6,010	$ 5,953

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Deposits and Short-Term Borrowings - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Time Deposits [Line Items]
Time deposit balance threshold	$ 100,000	$ 100,000
Time deposits of $100,000 or more totaled	354,775,000	433,813,000
Deposits received from related parties	109,638,000	93,267,000
Short-term borrowings [Member]
Time Deposits [Line Items]
Securities sold under agreements to repurchase	$ 235,572,000	$ 205,561,000

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Loans and Allowance for Loan Losses - Schedule of Loans Modified and Considered Troubled Debt Restructuring (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 SecurityLoan	Dec. 31, 2011 SecurityLoan
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	59	21
Pre-Modification Recorded Investment	$ 13,858	$ 7,325
Post-Modification Recorded Investment	13,858	7,325
Commercial [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	18	8
Pre-Modification Recorded Investment	1,180	2,467
Post-Modification Recorded Investment	1,180	2,467
Agricultural [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	5	4
Pre-Modification Recorded Investment	354	2,566
Post-Modification Recorded Investment	354	2,566
Real Estate [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	34	9
Pre-Modification Recorded Investment	12,304	2,292
Post-Modification Recorded Investment	12,304	2,292
Consumer [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	2
Pre-Modification Recorded Investment	20
Post-Modification Recorded Investment	$ 20

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Interest-Bearing Time Deposits in Banks and Securities - Amortized Cost and Estimated Fair Value of Debt Securities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments [Line Items]
Available-for-Sale Amortized Cost Basis, Due within one year	$ 156,237
Available-for-Sale Amortized Cost Basis, Due after one year through five years	494,482
Available-for-Sale Amortized Cost Basis, Due after five years through ten years	467,185
Available-for-Sale Amortized Cost Basis, Due after ten years	11,080
Available-for-Sale Amortized Cost Basis, Mortgage-backed securities	598,253
Available-for-Sale Amortized Cost Basis, Total	1,727,237
Available-for-Sale Estimated Fair Value, Due within one year	158,605
Available-for-Sale Estimated Fair Value, Due after one year through five years	514,761
Available-for-Sale Estimated Fair Value, Due after five years through ten years	509,127
Available-for-Sale Estimated Fair Value, Due after ten years	13,958
Available-for-Sale Estimated Fair Value, Mortgage-backed securities	622,584
Available-for-Sale Estimated Fair Value, Total	1,819,035
Held-to-Maturity Amortized Cost Basis, Due within one year	655
Held-to-Maturity Amortized Cost Basis, Due after one year through five years	80
Held-to-Maturity Amortized Cost Basis, Due after five year through ten years
Held-to-Maturity Amortized Cost Basis, Due after ten years
Held-to-Maturity Amortized Cost Basis, Mortgage-backed securities	326
Held-to-Maturity Amortized Cost Basis, Total	1,061
Held-to-Maturity Estimated Fair Value, Due within one year	658
Held-to-Maturity Estimated Fair Value, Due after one year through five years	84
Held-to-Maturity Estimated Fair Value, Due after five year through ten years
Held-to-Maturity Estimated Fair Value, Due after ten years
Held-to-Maturity Estimated Fair Value, Mortgage-backed securities	338
Held-to-Maturity Estimated Fair Value, Total	$ 1,080

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net earnings	$ 74,225	$ 68,369	$ 59,659
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	7,920	7,352	7,102
Provision for loan losses	3,484	6,626	8,962
Securities premium amortization (discount accretion), net	15,757	8,251	4,460
Gain on sale of assets, net	(2,628)	(80)	(2,765)
Deferred federal income tax expense (benefit)	(1,517)	2,005	1,089
Change in loans held for sale	(827)	2,531	(8,837)
Change in other assets	(5,170)	(1,075)	4,573
Change in other liabilities	1,818	1,132	(2,415)
Total adjustments	18,837	26,742	12,169
Net cash provided by operating activities	93,062	95,111	71,828
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash paid for acquisition of bank, less cash acquired			(2,463)
Net decrease (increase) in interest-bearing time deposits in banks	12,170	42,511	(47,063)
Activity in available-for-sale securities:
Sales	144,144	22,970	28,039
Maturities	1,909,635	1,886,632	1,812,241
Purchases	(2,049,275)	(2,171,404)	(2,068,639)
Activity in held-to-maturity securities - maturities	2,557	5,458	6,216
Net increase in loans	(306,412)	(108,152)	(82,823)
Purchases of bank premises and equipment and computer software	(16,180)	(14,777)	(11,240)
Proceeds from sale of other assets	8,370	5,732	9,924
Net cash used in (provided by) investing activities	(294,991)	(331,030)	(355,808)
Cash flows from financing activities:
Net increase in noninterest-bearing deposits	210,132	142,103	99,387
Net increase in interest-bearing deposits	87,654	79,394	179,237
Net increase in short-term borrowings	51,941	29,400	32,262
Common stock transactions:
Proceeds from stock issuances	824	950	789
Dividends paid	(38,719)	(29,359)	(28,346)
Net cash provided by (used in) financing activities	311,832	222,488	283,329
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	109,903	(13,431)	(651)
CASH AND CASH EQUIVALENTS, beginning of year	250,836	264,267	264,918
Cash and cash equivalents, end of year	$ 360,739	$ 250,836	$ 264,267

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Loans and Allowance for Loan Losses - Schedule of How Loans were Modified as Troubled Debt Restructured Loans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate	$ 1,687	$ 2,842
Extended Maturity	3,225	4,152
Combined Rate and Maturity	8,946	331
Commercial [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate	509	2,350
Extended Maturity	298	118
Combined Rate and Maturity	373
Agricultural [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate	243
Extended Maturity	15	2,566
Combined Rate and Maturity	95
Real Estate [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate	935	492
Extended Maturity	2,893	1,468
Combined Rate and Maturity	8,477	331
Consumer [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Adjusted Interest Rate
Extended Maturity	19
Combined Rate and Maturity	$ 1

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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Apr. 26, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Apr. 24, 2012	Oct. 26, 2011
Summary Of Significant Accounting Policies [Line Items]
Stock split conversion ratio	Three-for-two
Percentage of stock dividend declared	50.00%
Common stock, shares authorized		80,000,000	80,000,000		80,000,000
Stock repurchase program, number of shares authorized to be repurchased						750,000
Loans past due		90 days
Impairment recorded		$ 0	$ 0	$ 0
Other identifiable intangible assets, amortized period (years)		7 years
Goodwill and intangible assets with indefinite lives		71,865,000	71,865,000
Carrying amount of goodwill arising from acquisitions, is deductible for federal income tax purposes		49,609,000	49,609,000
Securities sold under agreements to repurchase maturity range (in days)		one to four
Interest-bearing time deposits, maturity period (in days)		90 days or less
Unrealized gains in available-for-sale securities, included in accumulated other comprehensive income		59,669,000	54,568,000
Minimum pension liability, included in accumulated other comprehensive income		8,360,000	7,343,000
Recorded stock option expense		$ 334,000	$ 427,000	$ 387,000

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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2012

Nature of Operations

Nature of Operations

First Financial Bankshares, Inc. (a Texas corporation) (“Bankshares”, “Company”, “we” or “us”) is a financial holding company which owns all of the capital stock of one bank with 55 locations located in Texas as of December 31, 2012. The subsidiary bank is First Financial Bank, National Association, Abilene. The bank’s primary source of revenue is providing loans and banking services to consumers and commercial customers in the market area in which the subsidiary is located. In addition, the Company also owns First Financial Trust & Asset Management Company, National Association, First Financial Insurance Agency, Inc., and First Technology Services, Inc. During 2011, First Financial Bankshares of Delaware, Inc and First Financial Investments of Delaware, Inc. were merged into the Company.

A summary of significant accounting policies of Bankshares and subsidiaries applied in the preparation of the accompanying consolidated financial statements follows. The accounting principles followed by the Company and the methods of applying them are in conformity with both U. S. generally accepted accounting principles and prevailing practices of the banking industry.

The Company evaluated subsequent events for potential recognition through the date the consolidated financial statements were issued.

Use of Estimates in Preparation of Financial Statements

Use of Estimates in Preparation of Financial Statements

The preparation of financial statements in conformity with U. S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Consolidation

Consolidation

The accompanying consolidated financial statements include the accounts of Bankshares and its subsidiaries, all of which are wholly-owned. All significant intercompany accounts and transactions have been eliminated. Certain reclassifications have been made to 2010 and 2011 financial statements to conform to the 2012 presentation.

Consolidation of Bank Charters

Consolidation of Bank Charters

Effective December 30, 2012, the Company consolidated its eleven bank charters into one charter. Regulatory, compliance and technology complexities and the opportunity for cost savings were the reasons for making this change. We expect to operate the prior eleven bank charters as regions with local management decisions with recommendations from the bank region’s advisory board to benefit the customers and communities it serves as we do currently.

Stock Split

Stock Split

On April 26, 2011, the Company’s Board of Directors declared a three-for-two stock split in the form of a 50% stock dividend effective for shareholders of record on May 16, 2011 that was distributed on June 1, 2011. All share and per share amounts in this report have been restated to reflect this stock split. An amount equal to the par value of the additional common shares issued pursuant to the stock split was reflected as a transfer from retained earnings to common stock on the consolidated financial statements as of and for the year ended December 31, 2011.

Increase in Authorized Shares

Increase in Authorized Shares

On April 24, 2012, the Company’s shareholders approved an amendment to the Company’s Amended and Restated Certificate of Formation to increase the number of authorized common shares to 80,000,000.

Stock Repurchase

Stock Repurchase

On October 26, 2011, the Company’s Board of Directors authorized the repurchase of up to 750,000 shares of its common stock through September 30, 2014. The stock buyback plan authorizes management to repurchase the stock at such time as repurchases are considered beneficial to stockholders. Any repurchase of stock will be made through the open market, block trades or in privately negotiated transactions in accordance with applicable laws and regulations. Under the repurchase plan, there is no minimum number of shares that the Company is required to repurchase. Through December 31, 2012, no shares have been repurchased under this authorization.

Investment Securities

Investment Securities

The Company records its available-for-sale and trading securities portfolio at fair value.

Management classifies debt and equity securities as held-to-maturity, available-for-sale, or trading based on its intent. Debt securities that management has the positive intent and ability to hold to maturity are classified as held-to-maturity and recorded at cost, adjusted for amortization of premiums and accretion of discounts, which are recognized as adjustments to interest income using the interest method. Securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at estimated fair value, with all unrealized gains and unrealized losses judged to be temporary, net of deferred income taxes, excluded from earnings and reported in the consolidated statements of comprehensive earnings. Available- for-sale securities that have unrealized losses that are judged other than temporary are included in gain (loss) on sale of securities and a new cost basis is established. Securities classified as trading are recorded at estimated fair value with unrealized gains and losses included in earnings.

Fair values of these securities are determined based on methodologies in accordance with current authoritative accounting guidance. Fair values are volatile and may be influenced by a number of factors, including market interest rates, prepayment speeds, discount rates, credit ratings and yield curves. Fair values for investment securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on the quoted prices of similar instruments or an estimate of fair value by using a range of fair value estimates in the market place as a result of the illiquid market specific to the type of security.

When the fair value of a security is below its amortized cost, and depending on the length of time the condition exists and the extent the fair value is below amortized cost, additional analysis is performed to determine whether an other-than-temporary impairment condition exists. Available-for-sale and held-to-maturity securities are analyzed quarterly for possible other-than-temporary impairment. The analysis considers (i) whether we have the intent to sell our securities prior to recovery and/or maturity, (ii) whether it is more likely than not that we will have to sell our securities prior to recovery and/or maturity, (iii) the length of time and extent to which the fair value has been less than costs, and (iv) the financial condition of the issuer. Often, the information available to conduct these assessments is limited and rapidly changing, making estimates of fair value subject to judgment. If actual information or conditions are different than estimated, the extent of the impairment of the security may be different than previously estimated, which could have a material effect on the Company’s results of operations and financial condition.

The Company’s investment portfolio consists of traditional investments, substantially in U. S. Treasury securities, obligations of U. S. government sponsored-enterprises and agencies, mortgage pass-through securities, corporate bonds and general obligation or revenue based municipal bonds. Pricing for such securities is generally readily available and transparent in the market. The Company utilizes independent third party pricing services to value its investment securities. The Company reviews the prices supplied by the independent pricing services as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with traditional pricing matrices. The Company validates quarterly, on a sample basis, prices supplied by the independent pricing services by comparison to prices obtained from other third party sources.

Loans and Allowance for Loan Losses

Loans and Allowance for Loan Losses

Loans held for investment are stated at the amount of unpaid principal, reduced by unearned income and an allowance for loan losses. Interest on loans is calculated by using the simple interest method on daily balances of the principal amounts outstanding. The Company defers and amortizes net loan origination fees and costs as an adjustment to yield. The allowance for loan losses is established through a provision for loan losses charged to expense. Loans are charged against the allowance for loan losses when management believes the collectability of the principal is unlikely.

The Company has certain lending policies and procedures in place that are designed to maximize loan income with an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis and makes changes as appropriate. Management receives and reviews periodic reports related to loan originations, quality, concentrations, delinquencies, nonperforming and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions, both by type of loan and geographic location.

Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and effectively. Underwriting standards are designed to determine whether the borrower possesses sound business ethics and practices and to evaluate current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the identified cash flows of the borrower and, secondarily, on the underlying collateral provided by the borrower. Most commercial loans are secured by the assets being financed or other business assets, such as accounts receivable or inventory and include personal guarantees.

Agricultural loans are subject to underwriting standards and processes similar to commercial loans. These agricultural loans are based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. Most agricultural loans are secured by the agriculture related assets being financed, such as farm land, cattle or equipment and include personal guarantees.

Real estate loans are also subject to underwriting standards and processes similar to commercial and agricultural loans. These loans are underwritten primarily based on projected cash flows and, secondarily, as loans secured by real estate. The repayment of real estate loans is generally largely dependent on the successful operation of the property securing the loans or the business conducted on the property securing the loan. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s real estate portfolio are generally diverse in terms of type and geographic location. This diversity helps reduce the exposure to adverse economic events that affect any single market or industry. Generally, real estate loans are owner occupied which further reduces the Company’s risk.

Consumer loan underwriting utilizes methodical credit standards and analysis to supplement the Company’s underwriting policies and procedures. The Company’s loan policy addresses types of consumer loans that may be originated and the collateral, if secured, which must be perfected. The relatively smaller individual dollar amounts of consumer loans that are spread over numerous individual borrowers also minimize the Company’s risk.

The allowance is an amount management believes is appropriate to absorb probable losses that have been incurred on existing loans as of the balance sheet date based upon management’s review and evaluation of the loan portfolio. The allowance for loan losses is comprised of three elements: (i) specific reserves determined in accordance with current authoritative accounting guidance based on probable losses on classified loans; (ii) general reserve determined in accordance with current authoritative accounting guidance that considers historical loss rates; and (iii) qualitative reserves determined in accordance with current authoritative accounting guidance based upon general economic conditions and other qualitative risk factors both internal and external to the Company. The allowance for loan losses is increased by charges to income and decreased by charge-offs (net of recoveries). Management’s periodic evaluation of the appropriateness of the allowance is based on general economic conditions, the financial condition of borrowers, the value and liquidity of collateral, delinquency, prior loan loss experience, and the results of periodic reviews of the portfolio. For purposes of determining our general reserve, the loan portfolio, less cash secured loans, government guaranteed loans and classified loans, is multiplied by the Company’s historical loss rate. Our methodology is constructed so that specific reserves are increased in response to deterioration in credit quality and a corresponding increase in risk of loss. In addition, we adjust our allowance for qualitative factors such as current local economic conditions and trends, including, without limitations, unemployment, changes in lending staff, policies and procedures, changes in credit concentrations, changes in the trends and severity of problem loans and changes in trends in volume and terms of loans. This additional qualitative reserve serves to compensate for additional areas of uncertainty inherent in our portfolio that are not reflected in our historic loss factors.

Although we believe we use the best information available to make loan loss allowance determinations, future adjustments could be necessary if circumstances or economic conditions differ substantially from the assumptions used in making our initial determinations. A further downturn in the economy and employment could result in increased levels of non-performing assets and charge-offs, increased loan provisions and reductions in income. Additionally, bank regulatory agencies periodically review our allowance for loan losses and could require additions to the loan loss allowance based on their judgment of information available to them at the time of their examination.

Accrual of interest is discontinued on a loan and payments are applied to principal when management believes, after considering economic and business conditions and collection efforts, the borrower’s financial condition is such that collection of interest is doubtful. Except consumer loans, generally all loans past due greater than 90 days, based on contractual terms, are placed on non-accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Consumer loans are generally charged-off when a loan becomes past due 90 days. For other loans in the portfolio, facts and circumstances are evaluated in making charge-off decisions.

Loans are considered impaired when, based on current information and events, it is probable we will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. If a loan is impaired, a specific reserve is recorded, if necessary. Interest payments on impaired loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Impaired loans, or portions thereof, are charged off when deemed uncollectable.

The Company’s policy requires measurement of the allowance for an impaired, collateral dependent loan based on the fair value of the collateral. Other loan impairments are measured based on the present value of expected future cash flows or the loan’s observable market price. At December 31, 2012 and 2011, all significant impaired loans have been determined to be collateral dependent and the allowance for loss has been measured utilizing the estimated fair value of the collateral.

From time to time, the Company modifies its loan agreement with a borrower. A modified loan is considered a troubled debt restructuring when two conditions are met: (i) the borrower is experiencing financial difficulty and (ii) concessions are made by the Company that would not otherwise be considered for a borrower with similar credit risk characteristics. Modifications to loan terms may include a lower interest rate, a reduction of principal, or a longer term to maturity. To date, troubled debt restructurings have been such that, after considering economic and business conditions and collection efforts, the collection of interest is doubtful and therefore the loan has been placed on non-accrual. Each of these loans is evaluated for impairment and a specific reserve is recorded based on probable losses, taking into consideration the related collateral and modified loan terms and cash flow. As of December 31, 2012 and 2011, all of the Company’s troubled debt restructured loans are included in the non-accrual totals.

The Company originates certain mortgage loans for sale in the secondary market. Accordingly, these loans are classified as held for sale and are carried at the lower of cost or fair value on an aggregate basis. The mortgage loan sales contracts contain indemnification clauses should the loans default, generally in the first three to six months, or if documentation is determined not to be in compliance with regulations. The Company’s historic losses as a result of these indemnities have been insignificant.

Other Real Estate

Other Real Estate

Other real estate is foreclosed property held pending disposition and is initially recorded at fair value, less estimated costs to sell. At foreclosure, if the fair value of the real estate, less estimated costs to sell, is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for loan losses. Any subsequent reduction in value is recognized by a charge to income. Operating and holding expenses of such properties, net of related income, and gains and losses on their disposition are included in net gain (loss) on sale of foreclosed assets as incurred.

Bank Premises and Equipment

Bank Premises and Equipment

Bank premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed principally on a straight-line basis over the estimated useful lives of the related assets. Leasehold improvements are amortized over the life of the respective lease or the estimated useful lives of the improvements, whichever is shorter.

Business Combinations, Goodwill and Other Intangible Assets

Business Combinations, Goodwill and Other Intangible Assets

The Company accounts for all business combinations under the purchase method of accounting. Tangible and intangible assets and liabilities of the acquired entity are recorded at fair value. Intangible assets with finite useful lives represent the future benefit associated with the acquisition of the core deposits and are amortized over seven years, utilizing a method that approximates the expected attrition of the deposits. Goodwill and intangible assets with indefinite lives are not amortized, but rather tested annually for impairment as of June 30 each year and totaled $71,865,000 at both December 31, 2012 and 2011. There was no impairment recorded for the years ended December 31, 2012, 2011 and 2010.

The carrying amount of goodwill arising from acquisitions that qualify as an asset purchase for federal income tax purposes was approximately $49,609,000 at both December 31, 2012 and 2011, and is deductible for federal income tax purposes.

Securities Sold Under Agreements To Repurchase

Securities Sold Under Agreements To Repurchase

Securities sold under agreements to repurchase, which are classified as short-term borrowings, generally mature within one to four days from the transaction date. Securities sold under agreements to repurchase are reflected at the amount of the cash received in connection with the transaction. The Company may be required to provide additional collateral based on the estimated fair value of the underlying securities.

Segment Reporting

Segment Reporting

The Company has determined that its banking regions meet the aggregation criteria of the current authoritative accounting guidance since each of its banking regions offers similar products and services, operates in a similar manner, has similar customers and reports to the same regulatory authority, and therefore operates one line of business (community banking) located in a single geographic area (Texas).

Statements of Cash Flows

Statements of Cash Flows

For purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks, including interest-bearing deposits in banks with original maturity of 90 days or less, and federal funds sold.

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

Unrealized gains on the Company’s available-for-sale securities (after applicable income tax expense) totaling $59,669,000 and $54,568,000 at December 31, 2012 and 2011, respectively, and the minimum pension liability totaled (after applicable income tax benefit) totaling $8,360,000 and $7,343,000 at December 31, 2012 and 2011, respectively, are included in accumulated other comprehensive income.

Income Taxes

Income Taxes

The Company’s provision for income taxes is based on income before income taxes adjusted for permanent differences between financial reporting and taxable income. Deferred tax assets and liabilities are determined using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws.

Stock Based Compensation

Stock Based Compensation

The Company grants stock options for a fixed number of shares to employees with an exercise price equal to the fair value of the shares at the grant date. The Company recorded stock option expense totaling $334,000, $427,000 and $387,000 for the years ended December 31, 2012, 2011 and 2010, respectively.

Advertising Costs

Advertising Costs

Advertising costs are expensed as incurred.

Per Share Data

Per Share Data

Net earnings per share (“EPS”) are computed by dividing net earnings by the weighted average number of common stock shares outstanding during the period. The Company calculates dilutive EPS assuming all outstanding options to purchase common stock have been exercised at the beginning of the year (or the time of issuance, if later.) The dilutive effect of the outstanding options is reflected by application of the treasury stock method, whereby the proceeds from the exercised options are assumed to be used to purchase common stock at the average market price during the period. The following table reconciles the computation of basic EPS to dilutive EPS:

	Net Earnings (in thousands)		Weighted Average Shares		Per Share Amount
For the year ended December 31, 2012
Net earnings per share, basic	$	74,225		31,480,155	$	2.36
Effect of stock options		—		21,112		—
Net earnings per share, assuming dilution	$	74,225		31,501,267	$	2.36
For the year ended December 31, 2011:
Net earnings per share, basic	$	68,369		31,443,712	$	2.17
Effect of stock options		—		18,252		—
Net earnings per share, assuming dilution	$	68,369		31,461,964	$	2.17
For the year ended December 31, 2010:
Net earnings per share, basic	$	59,659		31,291,486	$	1.91
Effect of stock options		—		28,077		—
Net earnings per share, assuming dilution	$	59,659		31,319,563	$	1.91

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Subsequent Event

12 Months Ended

Dec. 31, 2012

Subsequent Event

19. SUBSEQUENT EVENT (UNAUDITED):

On February 20, 2013, the Company announced that it has entered into a definitive agreement to acquire Orange Savings Bank, SSB in Orange, Texas for an expected combination of cash and stock purchase price of approximately $56.0 million. Pending regulatory and shareholder approval, the acquisition is expected to be finalized in the second quarter of 2013.

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Loans and Allowance for Loan Losses - Schedule of Past Due Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	$ 13,976	[1]	$ 13,485	[1]
60-89 Days Past Due	3,563		1,165
Greater Than 90 Days	1,647		1,035
Total Past Due	19,186		15,685
Total Current	2,057,980		1,760,230
Total	2,077,166		1,775,915
Total 90 Days Past Due Still Accruing	97		96
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	1,708	[1]	1,574	[1]
60-89 Days Past Due	470		430
Greater Than 90 Days	247
Total Past Due	2,425		2,004
Total Current	507,184		452,083
Total	509,609		454,087
Total 90 Days Past Due Still Accruing
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	467	[1]	300	[1]
60-89 Days Past Due	95		60
Greater Than 90 Days
Total Past Due	562		360
Total Current	67,744		67,762
Total	68,306		68,122
Total 90 Days Past Due Still Accruing
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	10,141	[1]	10,215	[1]
60-89 Days Past Due	2,711		547
Greater Than 90 Days	1,237		988
Total Past Due	14,089		11,750
Total Current	1,212,734		1,029,646
Total	1,226,823		1,041,396
Total 90 Days Past Due Still Accruing	34		62
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
15-59 Days Past Due	1,660	[1]	1,396	[1]
60-89 Days Past Due	287		128
Greater Than 90 Days	163		47
Total Past Due	2,110		1,571
Total Current	270,318		210,739
Total	272,428		212,310
Total 90 Days Past Due Still Accruing	$ 63		$ 34

[1] * The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

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Summary of Significant Accounting Policies - Computation of Basic EPS to Dilutive EPS (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net earnings	$ 74,225	$ 68,369	$ 59,659
Effect of stock options, Net Earnings
Net earnings per share, assuming dilution, Net Earnings	$ 74,225	$ 68,369	$ 59,659
Net earnings per share, basic, Weighted Average Shares	31,480,155	31,443,712	31,291,486
Effect of stock options, Weighted Average Shares	21,112	18,252	28,077
Net earnings per share, assuming dilution, Weighted Average Shares	31,501,267	31,461,964	31,319,563
Net earnings per share, basic, Per Share Amount	$ 2.36	$ 2.17	$ 1.91
Effect of stock options, Per Share Amount
Net earnings per share, assuming dilution, Per Share Amount	$ 2.36	$ 2.17	$ 1.91

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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Computation of Basic EPS to Dilutive EPS

The following table reconciles the computation of basic EPS to dilutive EPS:

	Net Earnings (in thousands)		Weighted Average Shares		Per Share Amount
For the year ended December 31, 2012
Net earnings per share, basic	$	74,225		31,480,155	$	2.36
Effect of stock options		—		21,112		—
Net earnings per share, assuming dilution	$	74,225		31,501,267	$	2.36
For the year ended December 31, 2011:
Net earnings per share, basic	$	68,369		31,443,712	$	2.17
Effect of stock options		—		18,252		—
Net earnings per share, assuming dilution	$	68,369		31,461,964	$	2.17
For the year ended December 31, 2010:
Net earnings per share, basic	$	59,659		31,291,486	$	1.91
Effect of stock options		—		28,077		—
Net earnings per share, assuming dilution	$	59,659		31,319,563	$	1.91

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Interest-Bearing Time Deposits in Banks and Securities (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Available-for-Sale and Held-to-Maturity Securities

A summary of the Company’s available-for-sale and held-to-maturity securities as of December 31, 2012 and 2011 are as follows (in thousands):

	December 31, 2012
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U. S. Treasury securities	$	6,042	$	48	$	—		$	6,090
Obligations of U.S. government sponsored-enterprises and agencies		219,420		4,060		—			223,480
Obligations of state and political subdivisions		786,278		57,541		(129	)		843,690
Corporate bonds and other		117,244		6,020		(73	)		123,191
Residential mortgage-backed securities		564,434		23,285		(443	)		587,276
Commercial mortgage-backed securities		33,819		1,739		(250	)		35,308
Total securities available-for-sale	$	1,727,237	$	92,693	$	(895	)	$	1,819,035
Securities held-to-maturity:
Obligations of state and political subdivisions	$	735	$	7	$	—		$	742
Residential mortgage-backed securities		294		11		—			305
Commercial mortgage-backed securities		32		1		—			33
Total debt securities held-to-maturity	$	1,061	$	19	$	—		$	1,080

	December 31, 2011
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U. S. Treasury Securities	$	15,143	$	204	$	—		$	15,347
Obligations of U.S. government sponsored-enterprises and agencies		255,548		5,802		(4	)		261,346
Obligations of state and political subdivisions		655,957		48,812		(98	)		704,671
Corporate bonds and other		127,514		4,215		(255	)		131,474
Residential mortgage-backed securities		681,277		24,247		(89	)		705,435
Commercial mortgage-backed securities		22,003		1,113		—			23,116
Total securities available-for-sale	$	1,757,442	$	84,393	$	(446	)	$	1,841,389
Securities held-to-maturity:
Obligations of state and political subdivisions	$	3,187	$	30	$	—		$	3,217
Residential mortgage-backed securities		358		14		—			372
Commercial mortgage-backed securities		64		2		—			66
Total debt securities held-to-maturity	$	3,609	$	46	$	—		$	3,655

Amortized Cost and Estimated Fair Value of Debt Securities

The amortized cost and estimated fair value of debt securities at December 31, 2012, by contractual and expected maturity, are shown below (in thousands):

	Available-for-Sale				Held-to-Maturity
	Amortized Cost Basis		Estimated Fair Value		Amortized Cost Basis		Estimated Fair Value
Due within one year	$	156,237	$	158,605	$	655	$	658
Due after one year through five years		494,482		514,761		80		84
Due after five years through ten years		467,185		509,127		—		—
Due after ten years		11,080		13,958		—		—
Mortgage-backed securities		598,253		622,584		326		338
Total	$	1,727,237	$	1,819,035	$	1,061	$	1,080

Continuous Unrealized-Loss Position Of Available-For-Sale And Held-To-Maturity Securities

The following table discloses, as of December 31, 2012 and 2011, the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 or more months (in thousands):

	Less than 12 Months				12 Months or Longer				Total
December 31, 2012	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of state and political subdivisions	$	36,480	$	129	$	—	$	—	$	36,480	$	129
Residential mortgage-backed securities		17,344		401		3,574		42		20,918		443
Commercial mortgage-backed securities		12,453		250		—		—		12,453		250
Corporate bonds and other		4,994		73		—		—		4,994		73
Total	$	71,271	$	853	$	3,574	$	42	$	74,845	$	895

	Less than 12 Months				12 Months or Longer				Total
December 31, 2011	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of U. S. government sponsored-enterprises and agencies	$	3,114	$	4	$	—	$	—	$	3,114	$	4
Obligations of state and political subdivisions		9,595		98		—		—		9,595		98
Residential mortgage-backed securities		13,722		89		—		—		13,722		89
Corporate bonds and other		17,533		255		—		—		17,533		255
Total	$	43,964	$	446	$	—	$	—	$	43,964	$	446

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Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash dividend per share	$ 0.99	$ 0.95	$ 0.91
Percentage of stock dividend		50.00%

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Loans and Allowance for Loan Losses (Tables)

12 Months Ended

Dec. 31, 2012

Major Classifications of Loans

Major classifications of loans are as follows (in thousands):

	December 31,
	2012		2011
Commercial	$	509,609	$	454,087
Agricultural		68,306		68,122
Real estate		1,226,823		1,041,396
Consumer		272,428		212,310
Total loans held for investment	$	2,077,166	$	1,775,915

Non-Accrual Loans, Loan Still Accruing and Past Due 90 Days or More Restructured Loans

The Company’s non-accrual loans, loan still accruing and past due 90 days or more restructured loans are as follows (in thousands):

	December 31,
	2012		2011
Non-accrual loans	$	21,800	$	19,975
Loans still accruing and past due 90 days or more		97		96
Restructured loans*		—		—
Total	$	21,897	$	20,071

* Restructured loans whose interest collection, after considering economic and business conditions and collection efforts, are doubtful are included in non-accrual loans.

Recorded Investment in Impaired Loans and Related Valuation Allowance

The Company’s recorded investment in impaired loans and the related valuation allowance are as follows (in thousands):

December 31, 2012				December 31, 2011
Recorded Investment		Valuation Allowance		Recorded Investment		Valuation Allowance
$	21,800	$	6,010	$	19,975	$	5,953

Schedule of Non-Accrual Loans

Non-accrual loans totaled $21,800,000 and $19,975,000, respectively, of this amount and consisted of (in thousands):

	December 31,
	2012		2011
Commercial	$	2,251	$	3,450
Agricultural		372		145
Real Estate		18,698		16,193
Consumer		479		187
Total	$	21,800	$	19,975

Schedule of Impaired Loans and Related Allowance

The Company’s impaired loans and related allowance as of December 31, 2012 and 2011 is summarized in the following table (in thousands). No interest income was recognized on impaired loans subsequent to their classification as impaired.

December 31, 2012	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment
Commercial	$	2,677	$	20	$	2,231	$	2,251	$	1,350	$	2,966
Agricultural		381		—		372		372		131		437
Real Estate		22,569		2,049		16,649		18,698		4,356		20,164
Consumer		543		115		364		479		173		458
Total	$	26,170	$	2,184	$	19,616	$	21,800	$	6,010	$	24,025

December 31, 2011	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment
Commercial	$	3,856	$	—	$	3,450	$	3,450	$	2,092	$	3,801
Agricultural		199		3		142		145		79		246
Real Estate		19,305		1,786		14,407		16,193		3,708		18,068
Consumer		227		29		158		187		74		233
Total	$	23,587	$	1,818	$	18,157	$	19,975	$	5,953	$	22,348

Schedule of Internal Ratings of Loans

At December 31, 2012 and 2011, the following summarizes the Company’s internal ratings of its loans (in thousands):

December 31, 2012	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	498,188	$	2,193	$	9,198	$	30	$	509,609
Agricultural		64,397		342		3,559		8		68,306
Real Estate		1,176,330		14,680		35,673		140		1,226,823
Consumer		271,114		382		911		21		272,428
Total	$	2,010,029	$	17,597	$	49,341	$	199	$	2,077,166

December 31, 2011	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	432,110	$	9,227	$	12,748	$	2	$	454,087
Agricultural		65,007		347		2,755		13		68,122
Real Estate		980,308		20,922		40,068		98		1,041,396
Consumer		211,177		302		820		11		212,310
Total	$	1,688,602	$	30,798	$	56,391	$	124	$	1,775,915

Schedule of Past Due Loans

At December 31, 2012 and 2011, the Company’s past due loans are as follows (in thousands):

December 31, 2012	15-59 Days Past Due *		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Total Current		Total Loans		Total 90 Days Past Due Still Accruing
Commercial	$	1,708	$	470	$	247	$	2,425	$	507,184	$	509,609	$	—
Agricultural		467		95		—		562		67,744		68,306		—
Real Estate		10,141		2,711		1,237		14,089		1,212,734		1,226,823		34
Consumer		1,660		287		163		2,110		270,318		272,428		63
Total	$	13,976	$	3,563	$	1,647	$	19,186	$	2,057,980	$	2,077,166	$	97

December 31, 2011	15-59 Days Past Due *		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Total Current		Total Loans		Total 90 Days Past Due Still Accruing
Commercial	$	1,574	$	430	$	—	$	2,004	$	452,083	$	454,087	$	—
Agricultural		300		60		—		360		67,762		68,122		—
Real Estate		10,215		547		988		11,750		1,029,646		1,041,396		62
Consumer		1,396		128		47		1,571		210,739		212,310		34
Total	$	13,485	$	1,165	$	1,035	$	15,685	$	1,760,230	$	1,775,915	$	96

* The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

Allowance for Loan Losses by Estimating Probable Losses in Various Categories of Loan Portfolio

The allowance for loan losses as of December 31, 2012 and 2011, is presented below (in thousands). Management has evaluated the appropriateness of the allowance for loan losses by estimating the losses in various categories of the loan portfolio which are identified below:

	2012		2011
Allowance for loan losses provided for:
Loans specifically evaluated as impaired	$	6,010	$	5,953
Remaining portfolio		28,829		28,362
Total allowance for loan losses	$	34,839	$	34,315

Schedule of Allowance for Loan Loss by Portfolio Segment

The following table details the allowance for loan loss at December 31, 2012 and 2011 by portfolio segment (in thousands). Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	3,253	$	388	$	8,380	$	308	$	12,329
Loan collectively evaluated for impairment		4,090		1,153		15,683		1,584		22,510
Total	$	7,343	$	1,541	$	24,063	$	1,892	$	34,839

December 31, 2011	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	4,647	$	758	$	8,310	$	282	$	13,997
Loan collectively evaluated for impairment		5,017		724		13,223		1,354		20,318
Total	$	9,664	$	1,482	$	21,533	$	1,636	$	34,315

Changes in Allowance for Loan Losses

Changes in the allowance for loan losses for the years ended December 31, 2012 and 2011 are summarized as follows (in thousands):

December 31, 2012	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	9,664		$	1,482		$	21,533		$	1,636		$	34,315
Provision (credit) for loan losses		(2,103	)		58			4,842			687			3,484
Recoveries		281			54			639			421			1,395
Charge-offs		(499	)		(53	)		(2,951	)		(852	)		(4,355	)
Ending balance	$	7,343		$	1,541		$	24,063		$	1,892		$	34,839

December 31, 2011	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	7,745		$	2,299		$	19,101		$	1,961		$	31,106
Provision (credit) for loan losses		1,949			(755	)		5,240			192			6,626
Recoveries		610			33			874			390			1,907
Charge-offs		(640	)		(95	)		(3,682	)		(907	)		(5,324	)
Ending balance	$	9,664		$	1,482		$	21,533		$	1,636		$	34,315

Schedule of Investment in Loans Related to Balance in Allowance for Loan Losses on Basis of Company's Impairment Methodology

The Company’s recorded investment in loans as of December 31, 2012 and 2011 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology was as follows (in thousands):

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	11,421	$	3,909	$	50,493	$	1,314	$	67,137
Loan collectively evaluated for impairment		498,188		64,397		1,176,330		271,114		2,010,029
Total	$	509,609	$	68,306	$	1,226,823	$	272,428	$	2,077,166

December 31, 2011	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	21,977	$	3,115	$	61,088	$	1,133	$	87,313
Loan collectively evaluated for impairment		432,110		65,007		980,308		211,177		1,688,602
Total	$	454,087	$	68,122	$	1,041,396	$	212,310	$	1,775,915

Schedule of Loans Modified and Considered Troubled Debt Restructuring

The Company’s loans that were modified in the years ended December 31, 2012 and 2011, and considered a troubled debt restructuring are as follows (dollars in thousands):

	Year ended December 31, 2012						Year ended December 31, 2011
	Number		Pre-Modification Recorded Investment		Post- Modification Recorded Investment		Number		Pre-Modification Recorded Investment		Post- Modification Recorded Investment
Commercial		18	$	1,180	$	1,180		8	$	2,467	$	2,467
Agricultural		5		354		354		4		2,566		2,566
Real Estate		34		12,304		12,304		9		2,292		2,292
Consumer		2		20		20		—		—		—
Total		59	$	13,858	$	13,858		21	$	7,325	$	7,325

Schedule of How Loans Were Modified as Troubled Debt Restructured Loans

The balances below provide information as to how the loans were modified as troubled debt restructured loans during the year ended December 31, 2012 and 2011 (in thousands):

	Year ended December 31, 2012						Year ended December 31, 2011
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	509	$	298	$	373	$	2,350	$	118	$	—
Agricultural		243		15		95		—		2,566		—
Real Estate		935		2,893		8,477		492		1,468		331
Consumer		—		19		1		—		—		—
Total	$	1,687	$	3,225	$	8,946	$	2,842	$	4,152	$	331

Schedule of Troubled Debt Restructuring

The loans are as follows (dollars in thousands):

	Year ended December 31, 2012
	Number		Balance
Commercial		1	$	30
Agriculture		—		—
Real Estate		6		1,509
Consumer		1		19
Total		8	$	1,558

Analysis of Changes in Loans to Officers, Directors, Principal Shareholders, or Associates of Such Persons

An analysis of the changes in loans to officers, directors, principal shareholders, or associates of such persons for the year ended December 31, 2012 (determined as of each respective year-end) follows (in thousands):

	Beginning Balance		Additional Loans		Payments		Ending Balance
Year ended December 31, 2012	$	42,548	$	81,196	$	80,226	$	43,518

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Pension and Profit Sharing Plans - Component Of Accumulated Other Comprehensive Earnings (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Net actuarial loss	$ (13,184)	$ (11,620)
Deferred tax benefit	4,824	4,277
Amounts included in accumulated other comprehensive earnings, net of tax	$ (8,360)	$ (7,343)

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Stock Option Plan (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Analysis of Stock Option Activity

An analysis of stock option activity for the year ended December 31, 2012 is presented in the table and narrative below:

	Shares			Weighted-Average Ex. Price		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value ($000)
Outstanding, beginning of year		481,024		$	29.11
Granted		—			—
Exercised		(37,246	)		22.13
Cancelled		(23,685	)		31.95
Outstanding, end of year		420,093		$	29.62		6.06	$	12,443
Exercisable at end of year		179,678		$	26.75		3.92	$	4,806

Schedule of Information Concerning Outstanding and Vested Stock Options

The following table summarizes information concerning outstanding and vested stock options as of December 31, 2012:

Exercise Price	Number Outstanding		Remaining Contracted Life (Years)		Number Vested
$15.40		11,805		0.4		11,805
$22.05		53,319		2.1		53,319
$27.32		82,994		4.1		62,984
$33.55		125,925		6.4		50,370
$31.45		146,050		8.8		1,200

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Loans and Allowance for Loan Losses - Schedule of Non-Accrual Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 21,800	$ 19,975
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	2,251	3,450
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	372	145
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	18,698	16,193
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 479	$ 187

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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Deferred Income Tax Assets And Liabilities [Line Items]
Tax basis of loans in excess of financial statement basis	$ 12,534	$ 12,231
Minimum liability in defined benefit plan	4,502	3,954
Deferred compensation	2,002	1,807
Write-downs and adjustments to other real estate owned and repossessed assets	148	538
Other deferred tax assets	255	306
Total deferred tax assets	19,441	18,836
Financial statement basis of fixed assets in excess of tax basis	5,678	5,204
Intangible asset amortization deductible for tax purposes, but not for financial reporting purposes	8,992	7,761
Accretion on investment securities	1,563	2,129
Pension plan contributions	2,147	1,668
Net unrealized gain on investment securities Available-for-sale	32,130	29,383
Other deferred tax liabilities	389	433
Total deferred tax liabilities	50,899	46,578
Net deferred tax asset (liability)	$ (31,458)	$ (27,742)

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Cash and due from banks	$ 207,018	$ 146,239
Federal funds sold	14,045
INTEREST-BEARING DEPOSITS IN BANKS	139,676	104,597
Total cash and cash equivalents	360,739	250,836
INTEREST-BEARING TIME DEPOSITS IN BANKS	49,005	61,175
Securities available-for-sale, at fair value	1,819,035	1,841,389
SECURITIES HELD-TO-MATURITY (fair value of $1,080 in 2012 and $3,655 in 2011)	1,061	3,609
LOANS:
Held for investment	2,077,166	1,775,915
Less - allowance for loan losses	(34,839)	(34,315)
Net loans held for investment	2,042,327	1,741,600
Held for sale	11,457	10,629
Net loans	2,053,784	1,752,229
BANK PREMISES AND EQUIPMENT, net	84,122	76,483
Intangible assets	71,973	72,122
Other assets	62,293	62,688
Total assets	4,502,012	4,120,531
LIABILITIES AND SHAREHOLDERS' EQUITY
NONINTEREST-BEARING DEPOSITS	1,311,708	1,101,576
INTEREST-BEARING DEPOSITS	2,320,876	2,233,222
Total deposits	3,632,584	3,334,798
DIVIDENDS PAYABLE		7,550
Short-term borrowings	259,697	207,756
OTHER LIABILITIES	52,768	61,890
Total liabilities	3,945,049	3,611,994
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY:
Common stock, $0.01 par value; authorized 80,000,000 shares; 31,496,881 and 31,459,635 issued at December 31, 2012 and 2011, respectively	315	314
Capital surplus	277,412	276,127
Retained earnings	227,927	184,871
Treasury stock (shares at cost: 266,845 and 258,235 at December 31, 2012 and 2011, respectively)	(5,007)	(4,597)
Deferred Compensation	5,007	4,597
Accumulated other comprehensive earnings	51,309	47,225
Total shareholders' equity	556,963	508,537
Total liabilities and shareholders' equity	$ 4,502,012	$ 4,120,531

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Interest-Bearing Time Deposits in Banks and Securities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest Bearing Time Deposits In Banks And Securities [Line Items]
INTEREST-BEARING TIME DEPOSITS IN BANKS	$ 49,005,000	$ 61,175,000
Interesting-bearing deposits, maturity period, years	90 days or less
Time deposits with balances greater than $100,000	44,776,000	51,813,000
Time deposits balances	100,000	100,000
Number of investment positions	90
Securities pledged as collateral	843,859,000	829,074,000
Sales of investment securities available-for-sale	144,144,000	22,970,000	28,039,000
Gross realized gains from securities sales and calls	2,816,000	505,000	363,000
Gross realized losses from sales	$ 44,000	$ 13,000	$ 0
Minimum [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Interesting-bearing deposits, maturity period, years	One
Maximum [Member]
Interest Bearing Time Deposits In Banks And Securities [Line Items]
Interesting-bearing deposits, maturity period, years	Two

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Condensed Financial Information - Parent Company - Condensed Statements of Earnings (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income:
Income, total	$ 159,796	$ 160,021	$ 149,699
Expenses:
Salaries and employee benefits	58,269	56,256	52,641
EARNINGS BEFORE INCOME TAXES AND EXTRAORDINARY ITEM	99,360	92,185	78,431
Income tax benefit	(25,135)	(23,816)	(20,068)
Net earnings	74,225	68,369	59,659
Parent company [Member]
Income:
Cash dividends from subsidiaries	58,400	47,350	41,050
Excess of earnings over dividends of subsidiary bank	17,547	22,722	20,149
Other income	2,682	2,435	1,991
Income, total	78,629	72,507	63,190
Expenses:
Salaries and employee benefits	3,668	3,493	2,833
Other operating expenses	2,338	2,199	2,068
Expenses, total	6,006	5,692	4,901
EARNINGS BEFORE INCOME TAXES AND EXTRAORDINARY ITEM	72,623	66,815	58,289
Income tax benefit	1,602	1,554	1,370
Net earnings	$ 74,225	$ 68,369	$ 59,659

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Consolidated Statements of Comprehensive Earnings (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net earnings	$ 74,225	$ 68,369	$ 59,659
OTHER ITEMS OF COMPREHENSIVE EARNINGS:
Change in unrealized gain (loss) on investment securities available-for-sale, before income tax	10,619	44,279	(15,332)
Reclassification adjustment for realized gains on investment securities included in net earnings, before income tax	(2,772)	(492)	(363)
Minimum liability pension adjustment, before income tax	(1,564)	(2,599)	(650)
Total other items of comprehensive earnings	6,283	41,188	(16,345)
Income tax benefit (expense) related to:
Investment securities	(2,746)	(15,325)	5,493
Minimum liability pension adjustment	547	909	227
Income tax expense related to other items of comprehensive earnings	(2,199)	(14,416)	5,720
COMPREHENSIVE EARNINGS	$ 78,309	$ 95,141	$ 49,034

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Stock Option Plan - Schedule of Information Concerning Outstanding and Vested Stock Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012
Exercise Price $15.40 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	$ 15.40
Number Outstanding	11,805
Number Vested	11,805
Remaining Contracted Life (Years)	4 months 24 days
Exercise Price $22.05 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	$ 22.05
Number Outstanding	53,319
Number Vested	53,319
Remaining Contracted Life (Years)	2 years 1 month 6 days
Exercise Price $27.32 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	$ 27.32
Number Outstanding	82,994
Number Vested	62,984
Remaining Contracted Life (Years)	4 years 1 month 6 days
Exercise Price $33.55 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	$ 33.55
Number Outstanding	125,925
Number Vested	50,370
Remaining Contracted Life (Years)	6 years 4 months 24 days
Exercise Price $31.45 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	$ 31.45
Number Outstanding	146,050
Number Vested	1,200
Remaining Contracted Life (Years)	8 years 9 months 18 days

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Loans and Allowance for Loan Losses - Changes in Allowance for Loan Losses (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 34,315	$ 31,106
Provision (credit) for loan losses	3,484	6,626
Recoveries	1,395	1,907
Charge-offs	(4,355)	(5,324)
Ending balance	34,839	34,315
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	9,664	7,745
Provision (credit) for loan losses	(2,103)	1,949
Recoveries	281	610
Charge-offs	(499)	(640)
Ending balance	7,343	9,664
Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,482	2,299
Provision (credit) for loan losses	58	(755)
Recoveries	54	33
Charge-offs	(53)	(95)
Ending balance	1,541	1,482
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	21,533	19,101
Provision (credit) for loan losses	4,842	5,240
Recoveries	639	874
Charge-offs	(2,951)	(3,682)
Ending balance	24,063	21,533
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,636	1,961
Provision (credit) for loan losses	687	192
Recoveries	421	390
Charge-offs	(852)	(907)
Ending balance	$ 1,892	$ 1,636

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Subsequent Event - Additional Information (Detail) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Feb. 20, 2013
Subsequent Event [Member]
Subsequent Event [Line Items]
Date of Acquisition Agreement	Feb. 20, 2013
Combination of cash and stock purchase price	$ 56.0

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Expense

The Company files a consolidated federal income tax return. Income tax expense is comprised of the following:

	Year Ended December 31,
	2012		2011		2010
Current federal income tax	$	23,605	$	21,727	$	19,625
Current state income tax		13		84		51
Deferred federal income tax expense (benefit)		1,517		2,005		1,089
Income tax expense	$	25,135	$	23,816	$	20,765

Percentage of Pretax Earnings, Differs from the Statutory Federal Income Tax Rate

Income tax expense, as a percentage of pretax earnings, differs from the statutory federal income tax rate as follows:

	As a Percent of Pretax Earnings
	2012			2011			2010
Statutory federal income tax rate		35.0	%		35.0	%		35.0	%
Reductions in tax rate resulting from interest income exempt from federal income tax		(9.7	)		(9.3	)		(9.2	)
Effect of state income tax		0.1			0.1			0.1
ESOP tax credit		(0.3	)		(0.3	)		(0.3	)
Other		0.2			0.3			0.2
Effective income tax rate		25.3	%		25.8	%		25.8	%

Schedule of Deferred Tax Assets and Liabilities

The approximate effects of each type of difference that gave rise to the Company’s deferred tax assets and liabilities at December 31, 2012 and 2011 are as follows:

	2012			2011
Deferred tax assets:
Tax basis of loans in excess of financial statement basis	$	12,534		$	12,231
Minimum liability in defined benefit plan		4,502			3,954
Recognized for financial reporting purposes but not for tax purposes:
Deferred compensation		2,002			1,807
Write-downs and adjustments to other real estate owned and repossessed assets		148			538
Other deferred tax assets		255			306
Total deferred tax assets		19,441			18,836
Deferred tax liabilities:
Financial statement basis of fixed assets in excess of tax basis		5,678			5,204
Intangible asset amortization deductible for tax purposes, but not for financial reporting purposes		8,992			7,761
Recognized for financial reporting purposes but not for tax purposes:
Accretion on investment securities		1,563			2,129
Pension plan contributions		2,147			1,668
Net unrealized gain on investment securities Available-for-sale		32,130			29,383
Other deferred tax liabilities		389			433
Total deferred tax liabilities		50,899			46,578
Net deferred tax asset (liability)	$	(31,458	)	$	(27,742	)

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Bank Premises and Equipment - Summary of Bank Premises and Equipment (Detail) (USD $) In Thousands, unless otherwise specified											12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Buildings [Member]	Dec. 31, 2011 Buildings [Member]	Dec. 31, 2012 Furniture and equipment [Member]	Dec. 31, 2011 Furniture and equipment [Member]	Dec. 31, 2012 Leasehold improvements [Member]	Dec. 31, 2011 Leasehold improvements [Member]	Dec. 31, 2012 Land [Member]	Dec. 31, 2011 Land [Member]	Dec. 31, 2012 Minimum [Member] Buildings [Member]	Dec. 31, 2012 Minimum [Member] Furniture and equipment [Member]	Dec. 31, 2012 Minimum [Member] Leasehold improvements [Member]	Dec. 31, 2012 Maximum [Member] Buildings [Member]	Dec. 31, 2012 Maximum [Member] Furniture and equipment [Member]	Dec. 31, 2012 Maximum [Member] Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Land									$ 19,024	$ 17,542
Buildings			81,988	76,822
Furniture and equipment					47,921	42,844
Leasehold improvements							4,137	3,991
Gross	153,070	141,199
Less-accumulated depreciation and amortization	(68,948)	(64,716)
Premises and equipment, Net	$ 84,122	$ 76,483
Useful Life in years											20 years	3 years	5 years	40 years	10 years	15 years

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Pension and Profit Sharing Plans

12 Months Ended

Dec. 31, 2012

Pension and Profit Sharing Plans

13. PENSION AND PROFIT SHARING PLANS:

The Company’s defined benefit pension plan was frozen effective January 1, 2004 whereby no additional years of service will accrue to participants, unless the pension plan is reinstated at a future date. The pension plan covered substantially all of the Company’s employees. The benefits for each employee were based on years of service and a percentage of the employee’s qualifying compensation during the final years of employment. The Company’s funding policy was and is to contribute annually the amount necessary to satisfy the Internal Revenue Service’s funding standards. Contributions to the pension plan, prior to freezing the plan, were intended to provide not only for benefits attributed to service to date but also for those expected to be earned in the future. As a result of the Pension Protection Act of 2006, the Company will be required to contribute amounts in future years to fund any shortfalls. The Company has evaluated the provisions of the Act as well as the Internal Revenue Service’s funding standards to develop a plan for funding in future years. The Company made a contribution totaling $2.0 million and $1.5 million in 2012 and 2011, respectively, and is continuing to evaluate future funding amounts.

Using an actuarial measurement date of December 31, 2012 and 2011, respectively, benefit obligation activity and fair value of plan assets for the years ended December 31, 2012 and 2011, and a statement of the funded status as of December 31, 2012 and 2011, are as follows (in thousands):

	2012			2011
Reconciliation of benefit obligations:
Benefit obligation at January 1	$	24,608		$	22,263
Interest cost on projected benefit obligation		1,113			1,139
Actuarial loss		3,470			2,320
Benefits paid		(1,353	)		(1,114	)
Benefit obligation at December 31		27,838			24,608
Reconciliation of fair value of plan assets:
Fair value of plan assets at January 1	$	18,077		$	17,184
Actual return on plan assets		2,387			506
Employer contributions		2,000			1,500
Benefits paid		(1,354	)		(1,114	)
Fair value of plan assets at December 31		21,110			18,076
Funded status	$	(6,728	)	$	(6,532	)

Amounts recognized as a component of accumulated other comprehensive earnings as of year-end that have not been recognized as a component of the net period benefit cost of the Company’s defined benefit pension plan are as follows (in thousands):

	2012			2011
Net actuarial loss	$	(13,184	)	$	(11,620	)
Deferred tax benefit		4,824			4,277
Amounts included in accumulated other comprehensive earnings, net of tax	$	(8,360	)	$	(7,343	)

Current authoritative accounting guidance requires an employer to recognize the overfunded or underfunded status of defined benefit post-retirement benefit plans as an asset or a liability in its balance sheet. The funded status is measured as the difference between plan assets at fair value and the benefit obligation. An employer is also required to measure the funded status of a plan as of the date of its year-end statement of financial position with changes in the funded status recognized through comprehensive income. Current authoritative accounting guidance also requires certain disclosures regarding the effects on net periodic benefit cost for the next fiscal year that arise from delayed recognition of gains or losses.

Net periodic pension cost for the years ended December 31, 2012, 2011, and 2010, included (in thousands):

	Year Ended December 31,
	2012			2011			2010
Service cost - benefits earned during the period	$	—		$	—		$	—
Interest cost on projected benefit obligation		1,113			1,139			1,159
Expected return on plan assets		(1,140	)		(1,220	)		(1,092	)
Amortization of unrecognized net loss		659			434			416
Net periodic pension cost	$	632		$	353		$	483

The following table sets forth the rates used in the actuarial calculations of the present value of benefit obligations and net periodic pension cost and the rate of return on plan assets:

	2012			2011			2010
Weighted average discount rate		3.75	%		4.65	%		5.25	%
Expected long-term rate of return on assets		6.25	%		6.75	%		6.75	%

The expected long-term rate of return on plan assets is based on historical returns and expectations of future returns based on asset mix, after consultation with our investment advisors and actuaries. The weighted average discount rate is estimated based on setting a discount rate to establish an obligation for pension benefits equivalent to an amount that, if invested in high quality fixed income securities, would produce a return that matches the expected benefit payment stream.

The major type of plan assets in the pension plan and the targeted allocation percentage as of December 31, 2012 and 2011 is as follows:

	December 31, 2012 Allocation			December 31, 2011 Allocation			Targeted Allocation
Equity securities		74	%		82	%		75	%
Debt securities		24	%		16	%		25	%
Cash and equivalents		2	%		2	%		—

The range and weighted average final maturities of debt securities held in the pension plan as of December 31, 2012 are 1.75 to 8.67 years and approximately 4.24 years, respectively. Assets held in the pension are considered either Level 1 consisting of the publicly traded common stocks and publically traded mutual funds or Level 2 consisting of agency and corporate debt securities. There were no Level 3 securities. See note 9 for a discussion of the fair value hierarchy. The breakdown by level is as follows (in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Money market fund	$	513	$	—	$	—	$	513
Obligations of state and political subdivisions		—		708		—		708
Corporate bonds		—		1,833		—		1,833
Mortgage-backed securities		—		1,018		—		1,018
Corporate stocks and mutual funds		17,038		—		—		17,038
Total	$	17,551	$	3,559	$	—	$	21,110

First Financial Trust & Asset Management Company, National Association, a wholly owned subsidiary of the Company, manages the pension plan assets as well as the profit sharing plan assets (see below). The investment strategy and targeted allocations are based on similar strategies First Financial Trust & Asset Management Company, National Association employs for most of its managed accounts whereby appropriate diversification is achieved. First Financial Trust & Asset Management Company, National Association is prohibited from holding investments deemed to be high risk by the Office of the Comptroller of the Currency.

An estimate of the undiscounted projected future payments to eligible participants for the next five years and the following five years in the aggregate is as follows (in thousands):

Year Ending December 31,
2013	$	1,309
2014		1,393
2015		1,403
2016		1,412
2017		1,447
2018 to 2022	$	8,214

As of December 31, 2012 and 2011, the pension plan’s assets included Company common stock valued at approximately $1,202,000 and $1,030,000, respectively.

The Company also provides a profit sharing plan, which covers substantially all full-time employees. The profit sharing plan is a defined contribution plan and allows employees to contribute a percentage of their base annual salary. Employees are fully vested to the extent of their contributions and become fully vested in the Company’s contributions over a six-year vesting period. Costs related to the Company’s defined contribution plan totaled approximately $4,711,000, $4,688,000, and $4,299,000 in 2012, 2011 and 2010, respectively, and are included in salaries and employee benefits in the accompanying consolidated statements of earnings. As of December 31, 2012 and 2011, the profit sharing plan’s assets included Company common stock valued at approximately $29,043,000 and $25,715,000, respectively.

In 2004, after freezing our pension plan, we added a safe harbor match to the 401(k) plan. We match a maximum of 4% on employee deferrals of 5% of their employee compensation. Total expense for this matching in 2012, 2011 and 2010 was $1,383,000, $1,305,000 and $1,220,000, respectively, and is included in salaries and employee benefits in the statements of earnings.

The Company has a directors’ deferred compensation plan whereby the directors may elect to defer up to 100% of their directors’ fees. All deferred compensation is invested in the Company’s common stock held in a rabbi trust. The stock is held in nominee name of the trustee, and the principal and earnings of the trust are held separate and apart from other funds of the Company, and are used exclusively for the uses and purposes of the deferred compensation agreement. The accounts of the trust have been consolidated in the financial statements of the Company.

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Fair Value Disclosures (Tables)

12 Months Ended

Dec. 31, 2012

Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of December 31, 2012, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available for sale investment securities:
U. S. Treasury securities	$	6,090	$	—	$	—	$	6,090
Obligations of U. S. government sponsored-enterprises and agencies		—		223,480		—		223,480
Obligations of state and political subdivisions		16,725		826,965		—		843,690
Corporate bonds		—		119,009		—		119,009
Mortgage-backed securities		—		622,584		—		622,584
Other securities		4,182		—		—		4,182
Total	$	26,997	$	1,792,038	$	—	$	1,819,035

Other Real Estate Owned

The following table presents other real estate owned that were re-measured subsequent to their initial transfer to other real estate owned (in thousands):

	Year Ended December 31,
	2012			2011
Carrying value of other real estate owned prior to remeasurement	$	5,375		$	7,064
Write-downs included in gain (loss) on sale of other real estate owned		(704	)		(1,522	)
Fair value	$	4,671		$	5,542

Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments Under Current Authoritative Guidance

The estimated fair values and carrying values of all financial instruments at December 31, 2012 and 2011, were as follows (in thousands):

	2012				2011
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Cash and due from banks	$	207,018	$	207,018	$	146,239	$	146,239
Federal funds sold		14,045		14,045		—		—
Interest-bearing deposits in banks		139,676		139,676		104,597		104,597
Interest-bearing time deposits in banks		49,005		49,288		61,175		61,175
Available for sale securities		1,819,035		1,819,035		1,841,389		1,841,389
Held to maturity securities		1,061		1,080		3,609		3,655
Loans		2,053,784		2,081,091		1,752,229		1,757,732
Accrued interest receivable		23,122		23,122		22,446		22,446
Deposits with stated maturities		637,040		638,227		752,298		754,186
Deposits with no stated maturities		2,995,544		2,995,544		2,582,500		2,582,500
Short-term borrowings		259,697		259,697		207,756		207,756
Accrued interest payable		287		287		594		594

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Cash Flow Information - Supplemental Information on Cash Flows and Noncash Transactions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplemental cash flow information:
Interest paid	$ 5,419	$ 8,664	$ 13,802
Federal income taxes paid	20,779	18,942	18,844
Schedule of noncash investing and financing activities:
Assets acquired through foreclosure	2,459	6,013	11,017
Investment securities purchased but not settled	$ 8,589	$ 21,325	$ 14,945

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Regulatory Matters

12 Months Ended

Dec. 31, 2012

Regulatory Matters

15. REGULATORY MATTERS:

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

Quantitative measures established by regulation to ensure capital adequacy require the Company and each of its subsidiaries to maintain minimum amounts and ratios (set forth in the table below) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes as of December 31, 2012 and 2011, that Company and each of its subsidiaries meet all capital adequacy requirements to which they are subject.

As of December 31, 2012 and 2011, the most recent notification from each respective subsidiary’s primary regulator categorized each of the Company’s subsidiaries as well-capitalized. To be categorized as well-capitalized, the subsidiaries must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the following table.

There are no conditions or events since that notification that management believes have changed the institutions’ categories. Bankshares’ and its significant subsidiaries’ actual capital amounts and ratios are presented in the table below (in thousands):

											To Be Well
											Capitalized Under
						For Capital					Prompt Corrective
	Actual					Adequacy Purposes:					Action Provisions:
	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2012:
Total Capital (to Risk-Weighted Assets):
Consolidated	$	475,442		19	%	³$	203,620	³	8	%		N/A
First Financial Bank - Abilene	$	376,106		15	%	³$	202,391	³	8	%	³$	252,988	³	10	%
Tier1 Capital (to Risk-Weighted Assets):
Consolidated	$	443,481		17	%	³$	101,810	³	4	%		N/A
First Financial Bank - Abilene	$	344,335		14	%	³$	101,195	³	4	%	³$	151,793	³	6	%
Tier1 Capital (to Average Assets):
Consolidated	$	443,481		11	%	³$	125,558	³	3	%		N/A
First Financial Bank - Abilene	$	344,335		8	%	³$	125,413	³	3	%	³$	209,021	³	5	%

											To Be Well
											Capitalized Under
						For Capital					Prompt Corrective
	Actual					Adequacy Purposes:					Action Provisions:
	Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2011:
Total Capital (to Risk-Weighted Assets):
Consolidated	$	426,532		19	%	³$	182,050	³	8	%		N/A
First Financial Bank - Abilene	$	110,120		15	%	³$	56,943	³	8	%	³$	71,179	³	10	%
First Financial Bank - San Angelo	$	38,744		18	%	³$	16,988	³	8	%	³$	21,235	³	10	%
First Financial Bank - Weatherford	$	33,975		16	%	³$	16,894	³	8	%	³$	21,117	³	10	%
First Financial Bank - Stephenville	$	33,062		14	%	³$	18,488	³	8	%	³$	23,109	³	10	%
First Financial Bank - Southlake	$	31,753		15	%	³$	16,570	³	8	%	³$	20,713	³	10	%
Tier1 Capital (to Risk-Weighted Assets):
Consolidated	$	397,916		17	%	³$	91,025	³	4	%		N/A
First Financial Bank - Abilene	$	103,002		14	%	³$	28,472	³	4	%	³$	42,707	³	6	%
First Financial Bank - San Angelo	$	36,237		17	%	³$	8,494	³	4	%	³$	12,741	³	6	%
First Financial Bank - Weatherford	$	31,309		15	%	³$	8,447	³	4	%	³$	12,670	³	6	%
First Financial Bank - Stephenville	$	30,143		13	%	³$	9,244	³	4	%	³$	13,866	³	6	%
First Financial Bank - Southlake	$	29,126		14	%	³$	8,285	³	4	%	³$	12,428	³	6	%
Tier1 Capital (to Average Assets):
Consolidated	$	397,916		10	%	³$	115,610	³	3	%		N/A
First Financial Bank - Abilene	$	103,002		8	%	³$	38,902	³	3	%	³$	64,837	³	5	%
First Financial Bank - San Angelo	$	36,237		9	%	³$	11,679	³	3	%	³$	19,465	³	5	%
First Financial Bank - Weatherford	$	31,309		8	%	³$	11,126	³	3	%	³$	18,544	³	5	%
First Financial Bank - Stephenville	$	30,143		9	%	³$	10,148	³	3	%	³$	16,914	³	5	%
First Financial Bank - Southlake	$	29,126		9	%	³$	9,225	³	3	%	³$	15,375	³	5	%

In connection with the First Financial Trust & Asset Management Company, N.A.’s (the “Trust Company”) application to obtain our trust charter, the Trust Company is required to maintain tangible net assets of $2,000,000 at all times. As of December 31, 2012, our Trust Company had tangible net assets totaling $5,099,000.

Our subsidiary bank may be required at times to maintain reserve balances with the Federal Reserve Bank. No such reserves were required at December 31, 2012 or December 31, 2011.

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Deposits and Short-Term Borrowings - Scheduled Maturities of Time Deposits (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Deposits [Line Items]
2013	$ 581,053
2014	37,769
2015	8,366
2016	4,893
Thereafter	4,959
Time deposits	$ 637,040

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Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Deferred Compensation [Member]	Accumulated Other Comprehensive Earnings (Losses) [Member]
BEGINNING BALANCE at Dec. 31, 2009	$ 415,702	$ 208	$ 269,294	$ 115,123	$ (3,833)	$ 3,833	$ 31,077
BEGINNING BALANCE, shares at Dec. 31, 2009		20,826,431			(162,836)
Net earnings	59,659			59,659
Stock issued in acquisition of Sam Houston Financial Corp.	4,032	1	4,031
Stock issued in acquisition of Sam Houston Financial Corp., shares		85,306
Stock option exercises	789		789
Stock option exercises, shares		30,404
Cash dividends declared	(28,385)			(28,385)
Minimum liability pension adjustment, net of related income taxes	(423)						(423)
Change in unrealized gain on investment in securities available-for-sale, net of related income taxes	(10,201)						(10,201)
Additional tax benefit related to directors' deferred compensation plan	128		128
Shares purchased in connection with directors' deferred compensation plan, net					(374)	374
Shares purchased in connection with directors' deferred compensation plan, net, shares					(3,493)
Stock option expense	387		387
ENDING BALANCE at Dec. 31, 2010	441,688	209	274,629	146,397	(4,207)	4,207	20,453
ENDING BALANCE, shares at Dec. 31, 2010		20,942,141			(166,329)
Net earnings	68,369			68,369
Stock option exercises	950		950
Stock option exercises, shares		36,317
Cash dividends declared	(29,790)			(29,790)
Minimum liability pension adjustment, net of related income taxes	(1,690)						(1,690)
Change in unrealized gain on investment in securities available-for-sale, net of related income taxes	28,462						28,462
Additional tax benefit related to directors' deferred compensation plan	121		121
Shares purchased in connection with directors' deferred compensation plan, net					(390)	390
Shares purchased in connection with directors' deferred compensation plan, net, shares					(8,760)
Stock option expense	427		427
Three-for-two stock split in the form of a 50% stock dividend		105		(105)
Three-for-two stock split in the form of a 50% stock dividend, shares		10,481,177			(83,146)
ENDING BALANCE at Dec. 31, 2011	508,537	314	276,127	184,871	(4,597)	4,597	47,225
ENDING BALANCE, shares at Dec. 31, 2011		31,459,635			(258,235)
Net earnings	74,225			74,225
Stock option exercises	825	1	824
Stock option exercises, shares		37,246
Cash dividends declared	(31,169)			(31,169)
Minimum liability pension adjustment, net of related income taxes	(1,017)						(1,017)
Change in unrealized gain on investment in securities available-for-sale, net of related income taxes	5,101						5,101
Additional tax benefit related to directors' deferred compensation plan	127		127
Shares purchased in connection with directors' deferred compensation plan, net					(410)	410
Shares purchased in connection with directors' deferred compensation plan, net, shares					(8,610)
Stock option expense	334		334
ENDING BALANCE at Dec. 31, 2012	$ 556,963	$ 315	$ 277,412	$ 227,927	$ (5,007)	$ 5,007	$ 51,309
ENDING BALANCE, shares at Dec. 31, 2012		31,496,881			(266,845)

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
SECURITIES HELD-TO-MATURITY, fair value	$ 1,080	$ 3,655
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	31,496,881	31,459,635
Treasury stock, shares	266,845	258,235

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Extraordinary Item

12 Months Ended

Dec. 31, 2012

Extraordinary Item

8. EXTRAORDINARY ITEM:

In the third quarter of 2010, the Company recorded income from an extraordinary item in the amount of $1.3 million, after income taxes, related to the expropriation of a portion of our real property. The Texas Department of Transportation (TXDOT) expropriated a portion of our real property at our Southlake bank location to expand highway access. TXDOT paid $2.2 million for land and damages to our existing property resulting in a net gain of $2.0 million before income taxes. As a result, our prior location’s accessibility significantly deteriorated and we constructed a new bank location in Southlake. We sold the prior Southlake location in August 2011.

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Stock Option Plan - Schedule of Analysis of Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning of year, Shares	481,024
Granted, Shares
Exercised, Shares	(37,246)
Cancelled, Shares	(23,685)
Outstanding, end of year, Shares	420,093
Exercisable at end of year, Shares	179,678
Outstanding, beginning of year, Weighted-Average Ex. Price	$ 29.11
Granted, Weighted-Average Ex. Price
Exercised, Weighted-Average Ex. Price	$ 22.13
Cancelled, Weighted-Average Ex. Price	$ 31.95
Outstanding, end of year, Weighted-Average Ex. Price	$ 29.62
Exercisable at end of year, Weighted-Average Ex. Price	$ 26.75
Outstanding, end of year, Weighted-Average Remaining Contractual Term (Years)	6 years 22 days
Exercisable at end of year, Weighted-Average Remaining Contractual Term (Years)	3 years 11 months 1 day
Outstanding, end of year, Aggregate Intrinsic Value	$ 12,443
Exercisable at end of year, Aggregate Intrinsic Value	$ 4,806

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Regulatory Matters - Additional Information (Detail) (USD $)	Dec. 31, 2012
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Required tangible net assets	$ 2,000,000
Tangible net assets, total	$ 5,099,000

XML

Document and Entity Information (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Feb. 22, 2013	Jun. 30, 2012
Entity Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Trading Symbol	FFIN
Entity Registrant Name	FIRST FINANCIAL BANKSHARES INC
Entity Central Index Key	0000036029
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		31,502,907
Entity Public Float			$ 1.03

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Fair Value Disclosures

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures

9. FAIR VALUE DISCLOSURES:

The accounting authoritative guidance for fair value measurements defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs. 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 and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact.

The accounting authoritative guidance requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement costs). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, the accounting authoritative guidance establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

• Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

• Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (for example, interest rates, volatilities, prepayment speeds, loss severities, credit risks and default rates) or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3 Inputs – Significant unobservable inputs that reflect an entity’s own assumptions that market participants would use in pricing the assets or liabilities.

A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.

In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

Securities classified as trading and available for sale are reported at fair value utilizing Level 1 and Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include market spreads, cash flows, the United States Treasury yield curve, live trading levels, trade execution data, dealer quotes, market consensus prepayments speeds, credit information and the security’s terms and conditions, among other items. Securities are considered to be measured with Level 1 inputs at the time of purchase and for 30 days following. After 30 days, the majority of securities are transferred to Level 2 as they are considered to be measured with Level 2 inputs, with the exception of U. S. Treasury securities and any other security for which there remain Level 1 inputs. Transfers are recognized on the actual date of transfer.

There were no transfers between Level 2 and Level 3 during the year ended December 31, 2012.

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of December 31, 2012, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available for sale investment securities:
U. S. Treasury securities	$	6,090	$	—	$	—	$	6,090
Obligations of U. S. government sponsored-enterprises and agencies		—		223,480		—		223,480
Obligations of state and political subdivisions		16,725		826,965		—		843,690
Corporate bonds		—		119,009		—		119,009
Mortgage-backed securities		—		622,584		—		622,584
Other securities		4,182		—		—		4,182
Total	$	26,997	$	1,792,038	$	—	$	1,819,035

Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis, that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). Financial assets and financial liabilities measured at fair value on a non-recurring basis include the following at December 31, 2012:

Impaired Loans – Impaired loans are reported at the fair value of the underlying collateral if repayment is expected solely from the collateral. Collateral values are estimated using Level 2 inputs based on observable market data or Level 3 input based on the discounting of the collateral. At December 31, 2012, impaired loans with a carrying value of $21,800,000 were reduced by specific valuation reserves totaling $6,010,000 resulting in a net fair value of $15,790,000.

Loans Held for Sale – Loans held for sale are reported at the lower of cost or fair value. In determining whether the fair value of loans held for sale is less than cost when quoted market prices are not available, the Company considers investor commitments/contracts. These loans are considered Level 2 of the fair value hierarchy. At December 31, 2012, the Company’s mortgage loans held for sale were recorded at cost as fair value exceeded cost.

Certain non-financial assets and non-financial liabilities measured at fair value on a non-recurring basis include other real estate owned, goodwill and other intangible assets and other non-financial long-lived assets. Non-financial assets measured at fair value on a non-recurring basis during the year ended December 31, 2012 and 2011 include other real estate owned which, subsequent to their initial transfer to other real estate owned from loans, were re-measured at fair value through a write-down included in gain (loss) on sale of foreclosed assets. During the reported periods, all fair value measurements for foreclosed assets utilized Level 2 inputs based on observable market data, generally third-party appraisals, or Level 3 inputs based on customized discounting criteria. These appraisals are evaluated individually and discounted as necessary due to the age of the appraisal, lack of comparable sales, expected holding periods of property or special use type of the property. Such discounts vary by appraisal based on the above factors but generally range from 5% to 25% of the appraised value. Reevaluation of other real estate owned is performed at least annually as required by regulatory guidelines or more often if particular circumstances arise. The following table presents other real estate owned that were re-measured subsequent to their initial transfer to other real estate owned (in thousands):

	Year Ended December 31,
	2012			2011
Carrying value of other real estate owned prior to remeasurement	$	5,375		$	7,064
Write-downs included in gain (loss) on sale of other real estate owned		(704	)		(1,522	)
Fair value	$	4,671		$	5,542

At December 31, 2012 and 2011, other real estate owned totaled $3,505,000 and $9,209,000, respectively.

The Company is required under current authoritative accounting guidance to disclose the estimated fair value of their financial instrument assets and liabilities including those subject to the requirements discussed above. For the Company, as for most financial institutions, substantially all of its assets and liabilities are considered financial instruments, as defined. Many of the Company’s financial instruments, however, lack an available trading market as characterized by a willing buyer and willing seller engaging in an exchange transaction.

The estimated fair value amounts of financial instruments have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to interpret data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a current market exchange. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

In addition, reasonable comparability between financial institutions may not be likely due to the wide range of permitted valuation techniques and numerous estimates which must be made given the absence of active secondary markets for many of the financial instruments. This lack of uniform valuation methodologies also introduces a greater degree of subjectivity to these estimated fair values.

Cash and due from banks, federal funds sold, interest bearing deposits and time deposits in banks and accrued interest receivable and payable are liquid in nature and considered Level 1 or 2 of the fair value hierarchy.

Financial instruments with stated maturities have been valued using a present value discounted cash flow with a discount rate approximating current market for similar assets and liabilities and are considered Levels 2 and 3 of the fair value hierarchy. Financial instrument liabilities with no stated maturities have an estimated fair value equal to both the amount payable on demand and the carrying value and are considered Level 1 of the fair value hierarchy.

The carrying value and the estimated fair value of the Company’s contractual off-balance-sheet unfunded lines of credit, loan commitments and letters of credit, which are generally priced at market at the time of funding, are not material.

The estimated fair values and carrying values of all financial instruments at December 31, 2012 and 2011, were as follows (in thousands):

	2012				2011
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Cash and due from banks	$	207,018	$	207,018	$	146,239	$	146,239
Federal funds sold		14,045		14,045		—		—
Interest-bearing deposits in banks		139,676		139,676		104,597		104,597
Interest-bearing time deposits in banks		49,005		49,288		61,175		61,175
Available for sale securities		1,819,035		1,819,035		1,841,389		1,841,389
Held to maturity securities		1,061		1,080		3,609		3,655
Loans		2,053,784		2,081,091		1,752,229		1,757,732
Accrued interest receivable		23,122		23,122		22,446		22,446
Deposits with stated maturities		637,040		638,227		752,298		754,186
Deposits with no stated maturities		2,995,544		2,995,544		2,582,500		2,582,500
Short-term borrowings		259,697		259,697		207,756		207,756
Accrued interest payable		287		287		594		594

XML

Financial Instruments with Off-Balance-Sheet Risk - Schedule of Financial Instruments with Off-Balance-Sheet Risk (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Concentration Risk [Line Items]
Financial instruments whose contract amounts represent credit risk	$ 431,243
Unfunded lines of credit [Member]
Concentration Risk [Line Items]
Financial instruments whose contract amounts represent credit risk	335,654
Unfunded commitments to extend credit [Member]
Concentration Risk [Line Items]
Financial instruments whose contract amounts represent credit risk	75,604
Standby letters of credit [Member]
Concentration Risk [Line Items]
Financial instruments whose contract amounts represent credit risk	$ 19,985

XML

Regulatory Matters - Schedule of Actual Capital Amounts and Ratios (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount	$ 475,442	$ 426,532
Tier1 Capital (to Risk-Weighted Assets), Actual Amount	443,481	397,916
Tier1 Capital (to Average Assets), Actual Amount	443,481	397,916
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	203,620
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	101,810
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount	125,558
Total Capital (to Risk-Weighted Assets), Actual Ratio	19.00%	19.00%
Tier1 Capital (to Risk-Weighted Assets), Actual Ratio	17.00%	17.00%
Tier1 Capital (to Average Assets), Actual Ratio	11.00%	10.00%
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	8.00%
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	4.00%
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio	3.00%
Abilene [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount	376,106	110,120
Tier1 Capital (to Risk-Weighted Assets), Actual Amount	344,335	103,002
Tier1 Capital (to Average Assets), Actual Amount	344,335	103,002
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	202,391
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount	101,195
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount	125,413
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	252,988
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	151,793
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	209,021
Total Capital (to Risk-Weighted Assets), Actual Ratio	15.00%	15.00%
Tier1 Capital (to Risk-Weighted Assets), Actual Ratio	14.00%	14.00%
Tier1 Capital (to Average Assets), Actual Ratio	8.00%	8.00%
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	8.00%
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio	4.00%
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio	3.00%
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%
San Angelo [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount		38,744
Tier1 Capital (to Risk-Weighted Assets), Actual Amount		36,237
Tier1 Capital (to Average Assets), Actual Amount		36,237
Total Capital (to Risk-Weighted Assets), Actual Ratio		18.00%
Tier1 Capital (to Risk-Weighted Assets), Actual Ratio		17.00%
Tier1 Capital (to Average Assets), Actual Ratio		9.00%
Weatherford [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount		33,975
Tier1 Capital (to Risk-Weighted Assets), Actual Amount		31,309
Tier1 Capital (to Average Assets), Actual Amount		31,309
Total Capital (to Risk-Weighted Assets), Actual Ratio		16.00%
Tier1 Capital (to Risk-Weighted Assets), Actual Ratio		15.00%
Tier1 Capital (to Average Assets), Actual Ratio		8.00%
Stephenville [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount		33,062
Tier1 Capital (to Risk-Weighted Assets), Actual Amount		30,143
Tier1 Capital (to Average Assets), Actual Amount		30,143
Total Capital (to Risk-Weighted Assets), Actual Ratio		14.00%
Tier1 Capital (to Risk-Weighted Assets), Actual Ratio		13.00%
Tier1 Capital (to Average Assets), Actual Ratio		9.00%
Southlake [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount		31,753
Tier1 Capital (to Risk-Weighted Assets), Actual Amount		29,126
Tier1 Capital (to Average Assets), Actual Amount		29,126
Total Capital (to Risk-Weighted Assets), Actual Ratio		15.00%
Tier1 Capital (to Risk-Weighted Assets), Actual Ratio		14.00%
Tier1 Capital (to Average Assets), Actual Ratio		9.00%
Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		182,050
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		91,025
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount		115,610
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		8.00%
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		4.00%
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio		3.00%
Minimum [Member] | Abilene [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		56,943
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		28,472
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount		38,902
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		71,179
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		42,707
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		64,837
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		8.00%
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		4.00%
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio		3.00%
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		10.00%
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		6.00%
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		5.00%
Minimum [Member] | San Angelo [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		16,988
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		8,494
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount		11,679
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		21,235
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		12,741
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		19,465
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		8.00%
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		4.00%
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio		3.00%
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		10.00%
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		6.00%
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		5.00%
Minimum [Member] | Weatherford [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		16,894
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		8,447
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount		11,126
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		21,117
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		12,670
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		18,544
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		8.00%
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		4.00%
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio		3.00%
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		10.00%
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		6.00%
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		5.00%
Minimum [Member] | Stephenville [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		18,488
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		9,244
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount		10,148
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		23,109
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		13,866
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		16,914
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		8.00%
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		4.00%
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio		3.00%
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		10.00%
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		6.00%
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		5.00%
Minimum [Member] | Southlake [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		16,570
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Amount		8,285
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount		9,225
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		20,713
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		12,428
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		$ 15,375
Total Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		8.00%
Tier1 Capital (to Risk-Weighted Assets), For Capital Adequacy Purposes, Ratio		4.00%
Tier1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio		3.00%
Total Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		10.00%
Tier1 Capital (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		6.00%
Tier1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		5.00%

XML

Consolidated Statements of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
INTEREST INCOME:
Interest and fees on loans	$ 102,172	$ 98,767	$ 92,715
Interest on investment securities:
Taxable	31,318	37,721	36,227
Exempt from federal income tax	25,552	22,312	19,216
Interest on federal funds sold and interest-bearing deposits in banks	754	1,221	1,541
Income, total	159,796	160,021	149,699
INTEREST EXPENSE:
Interest on deposits	4,877	7,822	13,071
Other	235	202	457
Total interest expense	5,112	8,024	13,528
Net interest income	154,684	151,997	136,171
Provision for loan losses	3,484	6,626	8,962
Net interest income after provision for loan losses	151,200	145,371	127,209
NONINTEREST INCOME:
Trust fees	14,464	12,671	10,809
Service charges on deposit accounts	16,693	17,689	20,104
ATM, interchange and credit card fees	15,187	13,587	11,276
Real estate mortgage operations	5,094	3,943	3,812
Net gain on sale of available-for-sale securities	2,772	492	363
Net gain (loss) on sale of foreclosed assets	(350)	(1,315)	457
Other	3,349	4,371	2,657
Total noninterest income	57,209	51,438	49,478
NONINTEREST EXPENSE:
Salaries and employee benefits	58,269	56,256	52,641
Net occupancy expense	7,076	6,862	6,442
Equipment expense	8,790	7,800	7,476
FDIC insurance premiums	2,220	2,646	4,000
ATM, interchange and credit card expenses	5,448	4,918	3,779
Professional and service fees	3,044	3,232	2,839
Printing, stationery and supplies	1,970	1,831	1,717
Amortization of intangible assets	149	402	609
Other expenses	22,083	20,677	18,753
Total noninterest expense	109,049	104,624	98,256
EARNINGS BEFORE INCOME TAXES AND EXTRAORDINARY ITEM	99,360	92,185	78,431
INCOME TAX EXPENSE	25,135	23,816	20,068
NET EARNINGS BEFORE EXTRAORDINARY ITEM	74,225	68,369	58,363
EXTRAORDINARY ITEM - EXPROPRIATION OF LAND, NET OF INCOME TAXES OF $697			1,296
Net earnings	$ 74,225	$ 68,369	$ 59,659
NET EARNINGS PER SHARE, BASIC BEFORE EXTRAORDINARY ITEM	$ 2.36	$ 2.17	$ 1.87
NET EARNINGS PER SHARE, ASSUMING DILUTION BEFORE EXTRAORDINARY ITEM	$ 2.36	$ 2.17	$ 1.87
NET EARNINGS PER SHARE, BASIC	$ 2.36	$ 2.17	$ 1.91
NET EARNINGS PER SHARE, ASSUMING DILUTION	$ 2.36	$ 2.17	$ 1.91

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Loans and Allowance for Loan Losses

12 Months Ended

Dec. 31, 2012

Loans and Allowance for Loan Losses

3. LOANS AND ALLOWANCE FOR LOAN LOSSES:

Major classifications of loans are as follows (in thousands):

	December 31,
	2012		2011
Commercial	$	509,609	$	454,087
Agricultural		68,306		68,122
Real estate		1,226,823		1,041,396
Consumer		272,428		212,310
Total loans held for investment	$	2,077,166	$	1,775,915

Certain amounts above for December 31, 2011 have been reclassified from prior presentation to be consistent with December 31, 2012 presentation.

Loans held for sale totaled $11,457,000 and $10,629,000 at December 31, 2012 and 2011, respectively, in which the carrying amounts approximate fair value.

The Company’s non-accrual loans, loan still accruing and past due 90 days or more restructured loans are as follows (in thousands):

	December 31,
	2012		2011
Non-accrual loans	$	21,800	$	19,975
Loans still accruing and past due 90 days or more		97		96
Restructured loans *		—		—
Total	$	21,897	$	20,071

* Restructured loans whose interest collection, after considering economic and business conditions and collection efforts, are doubtful are included in non-accrual loans.

The Company’s recorded investment in impaired loans and the related valuation allowance are as follows (in thousands):

December 31, 2012				December 31, 2011
Recorded Investment		Valuation Allowance		Recorded Investment		Valuation Allowance
$	21,800	$	6,010	$	19,975	$	5,953

The average recorded investment in impaired loans for the years ended December 31, 2012, 2011, and 2010 was approximately $24,025,000, $22,348,000, and $17,242,000 respectively. The Company had approximately $25,462,000, and $29,535,000 in nonaccrual, past due 90 days still accruing, restructured loans and foreclosed assets at December 31, 2012 and 2011, respectively. Non-accrual loans totaled $21,800,000 and $19,975,000, respectively, of this amount and consisted of (in thousands):

	December 31,
	2012		2011
Commercial	$	2,251	$	3,450
Agricultural		372		145
Real Estate		18,698		16,193
Consumer		479		187
Total	$	21,800	$	19,975

No additional funds are committed to be advanced in connection with impaired loans.

The Company’s impaired loans and related allowance as of December 31, 2012 and 2011 is summarized in the following table (in thousands). No interest income was recognized on impaired loans subsequent to their classification as impaired.

December 31, 2012	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment
Commercial	$	2,677	$	20	$	2,231	$	2,251	$	1,350	$	2,966
Agricultural		381		—		372		372		131		437
Real Estate		22,569		2,049		16,649		18,698		4,356		20,164
Consumer		543		115		364		479		173		458
Total	$	26,170	$	2,184	$	19,616	$	21,800	$	6,010	$	24,025

December 31, 2011	Unpaid Contractual Principal Balance		Recorded Investment With No Allowance		Recorded Investment With Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment
Commercial	$	3,856	$	—	$	3,450	$	3,450	$	2,092	$	3,801
Agricultural		199		3		142		145		79		246
Real Estate		19,305		1,786		14,407		16,193		3,708		18,068
Consumer		227		29		158		187		74		233
Total	$	23,587	$	1,818	$	18,157	$	19,975	$	5,953	$	22,348

The Company recognized interest income on impaired loans of approximately $384,000, $1,137,000 and $425,000 during the years ended December 31, 2012, 2011, and 2010, respectively.

From a credit risk standpoint, the Company classifies its loans in one of four categories: (i) pass, (ii) special mention, (iii) substandard or (iv) doubtful. Loans classified as loss are charged-off.

The classifications of loans reflect a judgment about the risks of default and loss associated with the loan. The Company reviews the ratings on our credits as part of our on-going monitoring of the credit quality of our loan portfolio. Ratings are adjusted to reflect the degree of risk and loss that is felt to be inherent in each credit as of each monthly reporting period. Our methodology is structured so that specific reserves are increased in accordance with deterioration in credit quality (and a corresponding increase in risk and loss) or decreased in accordance with improvement in credit quality (and a corresponding decrease in risk and loss).

Credits rated special mention show clear signs of financial weaknesses or deterioration in credit worthiness, however, such concerns are not so pronounced that the Company generally expects to experience significant loss within the short-term. Such credits typically maintain the ability to perform within standard credit terms and credit exposure is not as prominent as credits rated more harshly.

Credit rated substandard are those in which the normal repayment of principal and interest may be, or has been, jeopardized by reason of adverse trends or developments of a financial, managerial, economic or political nature, or important weaknesses exist in collateral. A protracted workout on these credits is a distinct possibility. Prompt corrective action is therefore required to strengthen the Company’s position, and/or to reduce exposure and to assure that adequate remedial measures are taken by the borrower. Credit exposure becomes more likely in such credits and a serious evaluation of the secondary support to the credit is performed.

Credits rated doubtful are those in which full collection of principal appears highly questionable, and which some degree of loss is anticipated, even thought the ultimate amount of loss may not yet be certain and/or other factors exist which could affect collection of debt. Based upon available information, positive action by the Company is required to avert or minimize loss. Credits rated doubtful are generally also placed on nonaccrual.

At December 31, 2012 and 2011, the following summarizes the Company’s internal ratings of its loans (in thousands):

December 31, 2012	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	498,188	$	2,193	$	9,198	$	30	$	509,609
Agricultural		64,397		342		3,559		8		68,306
Real Estate		1,176,330		14,680		35,673		140		1,226,823
Consumer		271,114		382		911		21		272,428
Total	$	2,010,029	$	17,597	$	49,341	$	199	$	2,077,166

December 31, 2011	Pass		Special Mention		Substandard		Doubtful		Total
Commercial	$	432,110	$	9,227	$	12,748	$	2	$	454,087
Agricultural		65,007		347		2,755		13		68,122
Real Estate		980,308		20,922		40,068		98		1,041,396
Consumer		211,177		302		820		11		212,310
Total	$	1,688,602	$	30,798	$	56,391	$	124	$	1,775,915

At December 31, 2012 and 2011, the Company’s past due loans are as follows (in thousands):

December 31, 2012	15-59 Days Past Due *		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Total Current		Total Loans		Total 90 Days Past Due Still Accruing
Commercial	$	1,708	$	470	$	247	$	2,425	$	507,184	$	509,609	$	—
Agricultural		467		95		—		562		67,744		68,306		—
Real Estate		10,141		2,711		1,237		14,089		1,212,734		1,226,823		34
Consumer		1,660		287		163		2,110		270,318		272,428		63
Total	$	13,976	$	3,563	$	1,647	$	19,186	$	2,057,980	$	2,077,166	$	97

December 31, 2011	15-59 Days Past Due *		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Total Current		Total Loans		Total 90 Days Past Due Still Accruing
Commercial	$	1,574	$	430	$	—	$	2,004	$	452,083	$	454,087	$	—
Agricultural		300		60		—		360		67,762		68,122		—
Real Estate		10,215		547		988		11,750		1,029,646		1,041,396		62
Consumer		1,396		128		47		1,571		210,739		212,310		34
Total	$	13,485	$	1,165	$	1,035	$	15,685	$	1,760,230	$	1,775,915	$	96

* The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

The allowance for loan losses as of December 31, 2012 and 2011, is presented below (in thousands). Management has evaluated the appropriateness of the allowance for loan losses by estimating the losses in various categories of the loan portfolio which are identified below:

	2012		2011
Allowance for loan losses provided for:
Loans specifically evaluated as impaired	$	6,010	$	5,953
Remaining portfolio		28,829		28,362
Total allowance for loan losses	$	34,839	$	34,315

The following table details the allowance for loan loss at December 31, 2012 and 2011 by portfolio segment (in thousands). Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	3,253	$	388	$	8,380	$	308	$	12,329
Loan collectively evaluated for impairment		4,090		1,153		15,683		1,584		22,510
Total	$	7,343	$	1,541	$	24,063	$	1,892	$	34,839

December 31, 2011	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	4,647	$	758	$	8,310	$	282	$	13,997
Loan collectively evaluated for impairment		5,017		724		13,223		1,354		20,318
Total	$	9,664	$	1,482	$	21,533	$	1,636	$	34,315

Changes in the allowance for loan losses for the years ended December 31, 2012 and 2011 are summarized as follows (in thousands):

December 31, 2012	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	9,664		$	1,482		$	21,533		$	1,636		$	34,315
Provision (credit) for loan losses		(2,103	)		58			4,842			687			3,484
Recoveries		281			54			639			421			1,395
Charge-offs		(499	)		(53	)		(2,951	)		(852	)		(4,355	)
Ending balance	$	7,343		$	1,541		$	24,063		$	1,892		$	34,839

December 31, 2011	Commercial			Agricultural			Real Estate			Consumer			Total
Beginning balance	$	7,745		$	2,299		$	19,101		$	1,961		$	31,106
Provision (credit) for loan losses		1,949			(755	)		5,240			192			6,626
Recoveries		610			33			874			390			1,907
Charge-offs		(640	)		(95	)		(3,682	)		(907	)		(5,324	)
Ending balance	$	9,664		$	1,482		$	21,533		$	1,636		$	34,315

The Company’s recorded investment in loans as of December 31, 2012 and 2011 related to the balance in the allowance for loan losses on the basis of the Company’s impairment methodology was as follows (in thousands):

December 31, 2012	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	11,421	$	3,909	$	50,493	$	1,314	$	67,137
Loan collectively evaluated for impairment		498,188		64,397		1,176,330		271,114		2,010,029
Total	$	509,609	$	68,306	$	1,226,823	$	272,428	$	2,077,166

December 31, 2011	Commercial		Agricultural		Real Estate		Consumer		Total
Loans individually evaluated for impairment	$	21,977	$	3,115	$	61,088	$	1,133	$	87,313
Loan collectively evaluated for impairment		432,110		65,007		980,308		211,177		1,688,602
Total	$	454,087	$	68,122	$	1,041,396	$	212,310	$	1,775,915

The Company’s loans that were modified in the years ended December 31, 2012 and 2011, and considered a troubled debt restructuring are as follows (dollars in thousands):

	Year ended December 31, 2012						Year ended December 31, 2011
	Number		Pre-Modification Recorded Investment		Post- Modification Recorded Investment		Number		Pre-Modification Recorded Investment		Post- Modification Recorded Investment
Commercial		18	$	1,180	$	1,180		8	$	2,467	$	2,467
Agricultural		5		354		354		4		2,566		2,566
Real Estate		34		12,304		12,304		9		2,292		2,292
Consumer		2		20		20		—		—		—
Total		59	$	13,858	$	13,858		21	$	7,325	$	7,325

The balances below provide information as to how the loans were modified as troubled debt restructured loans during the year ended December 31, 2012 and 2011 (in thousands):

	Year ended December 31, 2012						Year ended December 31, 2011
	Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity		Adjusted Interest Rate		Extended Maturity		Combined Rate and Maturity
Commercial	$	509	$	298	$	373	$	2,350	$	118	$	—
Agricultural		243		15		95		—		2,566		—
Real Estate		935		2,893		8,477		492		1,468		331
Consumer		—		19		1		—		—		—
Total	$	1,687	$	3,225	$	8,946	$	2,842	$	4,152	$	331

There were eight loans modified as a troubled debt restructured loan within the previous 12 months and for which there was a payment default during the year ended December 31, 2012. A default for purposes of this disclosure is a troubled debt restructured loan in which the borrower is 90 days past due or results in the foreclosure and repossession of the applicable collateral. There were no such defaults for the year ended December 31, 2011. The loans are as follows (dollars in thousands):

	Year ended December 31, 2012
	Number		Balance
Commercial		1	$	30
Agriculture		—		—
Real Estate		6		1,509
Consumer		1		19
Total		8	$	1,558

As of December 31, 2012, the Company has no commitments to lend additional funds to loan customers whose terms have been modified in troubled debt restructurings.

An analysis of the changes in loans to officers, directors, principal shareholders, or associates of such persons for the year ended December 31, 2012 (determined as of each respective year-end) follows (in thousands):

	Beginning Balance		Additional Loans		Payments		Ending Balance
Year ended December 31, 2012	$	42,548	$	81,196	$	80,226	$	43,518

In the opinion of management, those loans are on substantially the same terms, including interest rates and collateral requirements, as those prevailing at the time for comparable transactions with unaffiliated persons.

We have established a line of credit with the Federal Home Loan Bank of Dallas to provide liquidity and meet pledging requirements for those customers eligible to have securities pledged to secure certain uninsured deposits. At December 31, 2012, approximately $223,678,000 in loans held by our bank subsidiary were subject to blanket liens as security for letters of credit issued under these lines of credit. At December 31, 2012, $87,700,000 letters of credit issued by the Federal Home Loan Bank of Dallas were outstanding under these lines of credit. These letters of credit were pledged as collateral for public funds held by our bank.

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Interest-Bearing Time Deposits in Banks and Securities

12 Months Ended

Dec. 31, 2012

Interest-Bearing Time Deposits in Banks and Securities

2. INTEREST-BEARING TIME DEPOSITS IN BANKS AND SECURITIES:

Interest-bearing time deposits in banks totaled $49,005,000 and $61,175,000 at December 31, 2012 and 2011, respectively, and have original maturities generally ranging from one to two years. Of these amounts, $44,776,000 and $51,813,000, respectively, are time deposits with balances greater than $100,000 at December 31, 2012 and 2011.

A summary of the Company’s available-for-sale and held-to-maturity securities as of December 31, 2012 and 2011 are as follows (in thousands):

	December 31, 2012
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U. S. Treasury securities	$	6,042	$	48	$	—		$	6,090
Obligations of U.S. government sponsored-enterprises and agencies		219,420		4,060		—			223,480
Obligations of state and political subdivisions		786,278		57,541		(129	)		843,690
Corporate bonds and other		117,244		6,020		(73	)		123,191
Residential mortgage-backed securities		564,434		23,285		(443	)		587,276
Commercial mortgage-backed securities		33,819		1,739		(250	)		35,308
Total securities available-for-sale	$	1,727,237	$	92,693	$	(895	)	$	1,819,035
Securities held-to-maturity:
Obligations of state and political subdivisions	$	735	$	7	$	—		$	742
Residential mortgage-backed securities		294		11		—			305
Commercial mortgage-backed securities		32		1		—			33
Total debt securities held-to-maturity	$	1,061	$	19	$	—		$	1,080

	December 31, 2011
	Amortized Cost Basis		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Estimated Fair Value
Securities available-for-sale:
U. S. Treasury Securities	$	15,143	$	204	$	—		$	15,347
Obligations of U.S. government sponsored-enterprises and agencies		255,548		5,802		(4	)		261,346
Obligations of state and political subdivisions		655,957		48,812		(98	)		704,671
Corporate bonds and other		127,514		4,215		(255	)		131,474
Residential mortgage-backed securities		681,277		24,247		(89	)		705,435
Commercial mortgage-backed securities		22,003		1,113		—			23,116
Total securities available-for-sale	$	1,757,442	$	84,393	$	(446	)	$	1,841,389
Securities held-to-maturity:
Obligations of state and political subdivisions	$	3,187	$	30	$	—		$	3,217
Residential mortgage-backed securities		358		14		—			372
Commercial mortgage-backed securities		64		2		—			66
Total debt securities held-to-maturity	$	3,609	$	46	$	—		$	3,655

The Company invests in mortgage-backed securities that have expected maturities that differ from their contractual maturities. These differences arise because borrowers may have the right to call or prepay obligations with or without a prepayment penalty. These securities include collateralized mortgage obligations (CMOs) and other asset backed securities. The expected maturities of these securities at December 31, 2012, were computed by using scheduled amortization of balances and historical prepayment rates. At December 31, 2012 and 2011, the Company did not hold any CMOs that entail higher risks than standard mortgage-backed securities.

The amortized cost and estimated fair value of debt securities at December 31, 2012, by contractual and expected maturity, are shown below (in thousands):

	Available-for-Sale				Held-to-Maturity
	Amortized Cost Basis		Estimated Fair Value		Amortized Cost Basis		Estimated Fair Value
Due within one year	$	156,237	$	158,605	$	655	$	658
Due after one year through five years		494,482		514,761		80		84
Due after five years through ten years		467,185		509,127		—		—
Due after ten years		11,080		13,958		—		—
Mortgage-backed securities		598,253		622,584		326		338
Total	$	1,727,237	$	1,819,035	$	1,061	$	1,080

The following table discloses, as of December 31, 2012 and 2011, the Company’s investment securities that have been in a continuous unrealized-loss position for less than 12 months and for 12 or more months (in thousands):

	Less than 12 Months				12 Months or Longer				Total
December 31, 2012	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of state and political subdivisions	$	36,480	$	129	$	—	$	—	$	36,480	$	129
Residential mortgage-backed securities		17,344		401		3,574		42		20,918		443
Commercial mortgage-backed securities		12,453		250		—		—		12,453		250
Corporate bonds and other		4,994		73		—		—		4,994		73
Total	$	71,271	$	853	$	3,574	$	42	$	74,845	$	895

	Less than 12 Months				12 Months or Longer				Total
December 31, 2011	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Obligations of U. S. government sponsored-enterprises and agencies	$	3,114	$	4	$	—	$	—	$	3,114	$	4
Obligations of state and political subdivisions		9,595		98		—		—		9,595		98
Residential mortgage-backed securities		13,722		89		—		—		13,722		89
Corporate bonds and other		17,533		255		—		—		17,533		255
Total	$	43,964	$	446	$	—	$	—	$	43,964	$	446

The number of investment positions in this unrealized loss position totaled 90 at December 31, 2012. We do not believe these unrealized losses are “other than temporary” as (i) we do not have the intent to sell our securities prior to recovery and/or maturity and, (ii) it is more likely than not that we will not have to sell our securities prior to recovery and/or maturity. In making this determination, we also consider the length of time and extent to which fair value has been less than cost and the financial condition of the issuer. The unrealized losses noted are interest rate related due to the level of interest rates at December 31, 2012 compared to the time of purchase. We have reviewed the ratings of the issuers and have not identified any issues related to the ultimate repayment of principal as a result of credit concerns on these securities. Our mortgage related securities are backed by GNMA, FNMA and FHLMC or are collateralized by securities backed by these agencies.

Securities, carried at approximately $843,859,000 and $829,074,000 at December 31, 2012 and 2011, respectively, were pledged as collateral for public or trust fund deposits, securities sold under agreements to repurchase and for other purposes required or permitted by law.

During 2012, 2011, and 2010, sales of investment securities that were classified as available-for-sale totaled approximately $144,144,000, $22,970,000, and $28,039,000 respectively. Gross realized gains from 2012, 2011, and 2010, securities sales were approximately $2,816,000, $505,000, and $363,000, respectively. Gross realized losses from 2012 and 2011 securities sales were approximately $44,000 and $13,000, respectively. There were no losses on securities sales in 2010. The specific identification method was used to determine cost in computing the realized gains and losses.

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Dividends from Subsidiaries

12 Months Ended

Dec. 31, 2012

Dividends from Subsidiaries

14. DIVIDENDS FROM SUBSIDIARIES:

At December 31, 2012, approximately $59,966,000 was available for the declaration of dividends by the Company’s subsidiaries without the prior approval of regulatory agencies.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies

10. COMMITMENTS AND CONTINGENCIES:

The Company is engaged in legal actions arising from the normal course of business. In management’s opinion, the Company has adequate legal defenses with respect to these actions, and as of December 31, 2012 the resolution of these matters is not expected to have material adverse effects upon the results of operations or financial condition of the Company.

The Company leases a portion of its bank premises and equipment under operating leases. At December 31, 2012, future minimum lease commitments were: 2013 – $821,000; 2014 – $608,000; 2015 – $524,000; 2016 – $466,000; 2017 – $279,000 and thereafter – $28,000.

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Pension and Profit Sharing Plans - Net Periodic Pension Cost (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost - benefits earned during the period
Interest cost on projected benefit obligation	1,113	1,139	1,159
Expected return on plan assets	(1,140)	(1,220)	(1,092)
Amortization of unrecognized net loss	659	434	416
Net periodic pension cost	$ 632	$ 353	$ 483

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Line of Credit

12 Months Ended

Dec. 31, 2012

Line of Credit

6. LINE OF CREDIT

The Company renewed its loan agreement, effective June 30, 2011, with The Frost National Bank. Under the loan agreement, as renewed and amended, the Company is permitted to draw up to $25.0 million on a revolving line of credit. Prior to June 30, 2013, interest is paid quarterly at Wall Street Journal Prime and the line of credit matures June 30, 2013. If a balance exists at June 30, 2013, the principal balance converts to a term facility payable quarterly over five years and interest is paid quarterly at the election of the Company at Wall Street Journal Prime plus 50 basis points or LIBOR plus 250 basis points. The line of credit is unsecured. Among other provisions in the credit agreement, the Company must satisfy certain financial covenants during the term of the loan agreement, including, without limitation, covenants that require the Company to maintain certain capital, tangible net worth, loan loss reserve, non-performing asset and cash flow coverage ratio. In addition, the credit agreement contains certain operational covenants, that among others, restricts the payment of dividends above 55% of consolidated net income, limits the incurrence of debt (excluding any amounts acquired in an acquisition) and prohibits the disposal of assets except in the ordinary course of business. Management believes the Company was in compliance with the financial and operational covenants at December 31, 2012. There was no outstanding balance under the line of credit as of December 31, 2012 or 2011.

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Loans and Allowance for Loan Losses - Schedule of Investment in Loans Related to Balance in Allowance for Loan Losses on Basis of Company's Impairment Methodology (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	$ 67,137	$ 87,313
Loan collectively evaluated for impairment	2,010,029	1,688,602
Total	2,077,166	1,775,915
Commercial [Member]
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	11,421	21,977
Loan collectively evaluated for impairment	498,188	432,110
Total	509,609	454,087
Agricultural [Member]
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	3,909	3,115
Loan collectively evaluated for impairment	64,397	65,007
Total	68,306	68,122
Real Estate [Member]
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	50,493	61,088
Loan collectively evaluated for impairment	1,176,330	980,308
Total	1,226,823	1,041,396
Consumer [Member]
Schedule Of Allowance For Credit Losses And Recorded Investment In Financing Receivables [Line Items]
Loans individually evaluated for impairment	1,314	1,133
Loan collectively evaluated for impairment	271,114	211,177
Total	$ 272,428	$ 212,310

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Bank Premises and Equipment

12 Months Ended

Dec. 31, 2012

Bank Premises and Equipment

4. BANK PREMISES AND EQUIPMENT:

The following is a summary of bank premises and equipment (in thousands):

	Useful Life	December 31,
		2012			2011
Land	—	$	19,024		$	17,542
Buildings	20 to 40 years		81,988			76,822
Furniture and equipment	3 to 10 years		47,921			42,844
Leasehold improvements	Lesser of lease term or 5 to 15 years		4,137			3,991
			153,070			141,199
Less- accumulated depreciation and amortization			(68,948	)		(64,716	)
		$	84,122		$	76,483

Depreciation expense for the years ended December 31, 2012, 2011 and 2010 amounted to $6,492,000, $5,875,000, and $5,604,000, respectively and is included in the captions net occupancy expense and equipment expense in the accompanying consolidated statements of earnings.

The Company is lessor for portions of its banking premises. Total rental income for all leases included in net occupancy expense is approximately $1,703,000, $1,646,000 and $1,687,000, for the years ended December 31, 2012, 2011, and 2010, respectively.

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Deposits and Short-Term Borrowings

12 Months Ended

Dec. 31, 2012

Deposits and Short-Term Borrowings

5. DEPOSITS AND SHORT-TERM BORROWINGS

Time deposits of $100,000 or more totaled approximately $354,775,000 and $433,813,000 at December 31, 2012 and 2011, respectively.

At December 31, 2012, the scheduled maturities of time deposits (in thousands) were, as follows:

Year ending December 31,
2013	$	581,053
2014		37,769
2015		8,366
2016		4,893
Thereafter		4,959
	$	637,040

Deposits received from related parties at December 31, 2012 and 2011 totaled $109,638,000 and $93,267,000, respectively.

Included in short-term borrowings at December 31, 2012 and 2011 are $235,572,000 and $205,561,000, respectively, in securities sold under agreements to repurchase.

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Income Taxes

12 Months Ended

Dec. 31, 2012

Income Taxes

7. INCOME TAXES:

The Company files a consolidated federal income tax return. Income tax expense is comprised of the following:

	Year Ended December 31,
	2012		2011		2010
Current federal income tax	$	23,605	$	21,727	$	19,625
Current state income tax		13		84		51
Deferred federal income tax expense (benefit)		1,517		2,005		1,089
Income tax expense	$	25,135	$	23,816	$	20,765

Income tax expense, as a percentage of pretax earnings, differs from the statutory federal income tax rate as follows:

	As a Percent of Pretax Earnings
	2012			2011			2010
Statutory federal income tax rate		35.0	%		35.0	%		35.0	%
Reductions in tax rate resulting from interest income exempt from federal income tax		(9.7	)		(9.3	)		(9.2	)
Effect of state income tax		0.1			0.1			0.1
ESOP tax credit		(0.3	)		(0.3	)		(0.3	)
Other		0.2			0.3			0.2
Effective income tax rate		25.3	%		25.8	%		25.8	%

The approximate effects of each type of difference that gave rise to the Company’s deferred tax assets and liabilities at December 31, 2012 and 2011 are as follows:

	2012			2011
Deferred tax assets:
Tax basis of loans in excess of financial statement basis	$	12,534		$	12,231
Minimum liability in defined benefit plan		4,502			3,954
Recognized for financial reporting purposes but not for tax purposes:
Deferred compensation		2,002			1,807
Write-downs and adjustments to other real estate owned and repossessed assets		148			538
Other deferred tax assets		255			306
Total deferred tax assets		19,441			18,836
Deferred tax liabilities:
Financial statement basis of fixed assets in excess of tax basis		5,678			5,204
Intangible asset amortization deductible for tax purposes, but not for financial reporting purposes		8,992			7,761
Recognized for financial reporting purposes but not for tax purposes:
Accretion on investment securities		1,563			2,129
Pension plan contributions		2,147			1,668
Net unrealized gain on investment securities Available-for-sale		32,130			29,383
Other deferred tax liabilities		389			433
Total deferred tax liabilities		50,899			46,578
Net deferred tax asset (liability)	$	(31,458	)	$	(27,742	)

Current authoritative accounting guidance prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of cumulative benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. Current authoritative accounting guidance also provides guidance on the accounting for and disclosure of unrecognized tax benefits, interest and penalties. The Company concluded the tax benefits of positions taken and expected to be taken on its tax returns should be recognized in the financial statements under this guidance. The Company files income tax returns in the U.S. federal jurisdiction and several U.S. state jurisdictions. We are no longer subject to U.S. federal income tax examinations by tax authorities for years before 2009 or Texas state tax examinations by tax authorities for years before 2011.

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Loans and Allowance for Loan Losses - Analysis of Changes in Loans to Officers, Directors, Principal Shareholders, or Associates of Such Persons (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 42,548
Additional Loans	81,196
Payments	80,226
Ending Balance	$ 43,518

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Pension and Profit Sharing Plans - Benefit Obligations and Net Periodic Pension Cost and Rate of Return on Plan Assets (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair Value Measurement Inputs Disclosure [Line Items]
Weighted average discount rate	3.75%	4.65%	5.25%
Expected long-term rate of return on assets	6.25%	6.75%	6.75%

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Bank Premises and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 6,492,000	$ 5,875,000	$ 5,604,000
Rental income for leases included in net occupancy expense	$ 1,703,000	$ 1,646,000	$ 1,687,000

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Loans and Allowance for Loan Losses - Schedule of Troubled Debt Restructuring (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012 Contract
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	8
Balance	$ 1,558
Commercial [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	1
Balance	30
Agricultural [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	0
Balance	0
Real Estate [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	6
Balance	1,509
Consumer [Member]
Troubled Debt Restructured Loan Modifications by Class [Line Items]
Number	1
Balance	$ 19

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Stock Option Plan - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012 Y	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of stock for issuance under the plan	1,920,000
Options exercisable period after, years	two
Percentage of options granted	20.00%
Duration of options granted, years	10
Stock options outstanding, exercise price range, lower	$ 15.40
Stock options outstanding, exercise price range, upper	$ 33.55
Weighted-average assumptions, risk-free interest rate		1.34%
Expected dividend yield		2.88%
Expected life		5 years 11 months 5 days
Expected volatility		26.92%
Weighted-average grant-date fair value of options granted	$ 0.00	$ 5.94	$ 0.00
Total intrinsic value of options exercised	$ 510,000	$ 619,000	$ 778,000
Total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan	1,118,000
Weighted-average period of unrecognized compensation cost recognition, years	1 year 11 months 12 days
Total fair value of shares vested	423,000	369,000	213,000
Aggregate intrinsic value of vested stock options	$ 2,203,000

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Deposits and Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2012

Scheduled Maturities of Time Deposits

At December 31, 2012, the scheduled maturities of time deposits (in thousands) were, as follows:

Year ending December 31,
2013	$	581,053
2014		37,769
2015		8,366
2016		4,893
Thereafter		4,959
	$	637,040

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Loans and Allowance for Loan Losses - Non-Accrual Loans, Loan Still Accruing and Past Due 90 Days or More Restructured Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Non-accrual loans	$ 21,800		$ 19,975
Loans still accruing and past due 90 days or more	97		96
Restructured loans	0	[1]	0	[1]
Total	$ 21,897		$ 20,071

[1] * Restructured loans whose interest collection, after considering economic and business conditions and collection efforts, are doubtful are included in non-accrual loans.

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Concentration of Credit Risk

12 Months Ended

Dec. 31, 2012

Concentration of Credit Risk

12. CONCENTRATION OF CREDIT RISK:

The Company grants commercial, retail, agriculture and residential real estate loans to customers primarily in North Central, Southeastern and West Texas. Although the Company has a diversified loan portfolio, a substantial portion of its borrowers’ ability to honor their commitments is dependent upon each local economic sector. In addition, the Company holds mortgage related securities which are backed by GNMA, FNMA or FHLMC or are collateralized by securities backed by these agencies.

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Condensed Financial Information - Parent Company

12 Months Ended

Dec. 31, 2012

Condensed Financial Information - Parent Company

17. CONDENSED FINANCIAL INFORMATION - PARENT COMPANY:

Condensed Balance Sheets-December 31, 2012 and 2011

	2012			2011
ASSETS
Cash in subsidiary bank	$	4,780		$	16,800
Cash in unaffiliated banks		2			2
Interest-bearing deposits in unaffiliated bank		—			5,026
Interest-bearing deposits in subsidiary bank		67,263			28,192
Total cash and cash equivalents		72,045			50,020
Interest-bearing time deposits in unaffiliated banks		3,078			2,118
Securities available-for-sale, at fair value		12,706			17,729
Investment in and advances to subsidiaries, at equity		468,502			446,320
Intangible assets		723			723
Other assets		1,961			2,009
Total assets	$	559,015		$	518,919
LIABILITIES AND SHAREHOLDERS’ EQUITY
Total liabilities	$	2,052		$	10,382
Shareholders’ equity:
Common stock		315			315
Capital surplus		277,412			276,126
Retained earnings		227,927			184,871
Treasury shares		(5,007	)		(4,597	)
Deferred compensation		5,007			4,597
Accumulated other comprehensive earnings		51,309			47,225
Total shareholders’ equity		556,963			508,537
Total liabilities and shareholders’ equity	$	559,015		$	518,919

Condensed Statements of Earnings-

For the Years Ended December 31, 2012, 2011 and 2010

	2012		2011		2010
Income:
Cash dividends from subsidiaries	$	58,400	$	47,350	$	41,050
Excess of earnings over dividends of subsidiary bank		17,547		22,722		20,149
Other income		2,682		2,435		1,991
		78,629		72,507		63,190
Expenses:
Salaries and employee benefits		3,668		3,493		2,833
Other operating expenses		2,338		2,199		2,068
		6,006		5,692		4,901
Earnings before income taxes		72,623		66,815		58,289
Income tax benefit		1,602		1,554		1,370
Net earnings	$	74,225	$	68,369	$	59,659

Condensed Statements of Cash Flows-

For the Years Ended December 31, 2012, 2011, and 2010

	2012			2011			2010
Cash flows from operating activities:
Net earnings	$	74,225		$	68,369		$	59,659
Adjustments to reconcile net earnings to net cash provided by operating activities:
Excess of earnings over dividends of subsidiary bank		(17,547	)		(22,722	)		(20,149	)
Depreciation and amortization, net		142			187			171
Decrease in other assets		34			396			10
Increase (decrease) in liabilities		(918	)		774			(29	)
Net cash provided by operating activities		55,936			47,004			39,662
Cash flows from investing activities:
Acquisition of bank		—			—			(18,200	)
Net decrease (increase) in interest-bearing time deposits in unaffiliated banks		(960	)		2,160			(198	)
Purchase of available for sale securities		—			(5,756	)		(5,649	)
Maturities of available for sale securities		5,430			2,500			2,500
Purchases of bank premises and equipment		(86	)		(204	)		(59	)
Repayment from (of advances related to) investment in and advances to subsidiaries, net		(400	)		820			(200	)
Net cash used in (provided by) investing activities		3,984			(480	)		(21,806	)
Cash flows from financing activities:
Proceeds of stock issuances		824			950			790
Cash dividends paid		(38,719	)		(29,359	)		(28,346	)
Net cash used in financing activities		(37,895	)		(28,409	)		(27,556	)
Net increase (decrease) in cash and cash equivalents		22,025			18,115			(9,700	)
Cash and cash equivalents, beginning of year		50,020			31,905			41,605
Cash and cash equivalents, end of year	$	72,045		$	50,020		$	31,905

In connection with the Company’s Federal Housing Administration (FHA) mortgage loan originations, the parent company has executed a corporate guarantee agreement in which the parent company guarantees the ongoing FHA net worth and liquidity compliance of First Financial Bank, N.A., Abilene.

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Condensed Financial Information - Parent Company - Condensed Balance Sheets (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
ASSETS
INTEREST-BEARING DEPOSITS IN BANKS	$ 139,676,000	$ 104,597,000
Total cash and cash equivalents	360,739,000	250,836,000	264,267,000	264,918,000
Interest-bearing time deposits in unaffiliated banks	49,005,000	61,175,000
Securities available-for-sale, at fair value	1,819,035,000	1,841,389,000
Intangible assets	71,973,000	72,122,000
Other assets	62,293,000	62,688,000
Total assets	4,502,012,000	4,120,531,000
LIABILITIES AND SHAREHOLDERS' EQUITY
Total liabilities	3,945,049,000	3,611,994,000
SHAREHOLDERS' EQUITY:
Common stock	315,000	314,000
Capital surplus	277,412,000	276,127,000
Retained earnings	227,927,000	184,871,000
Treasury shares	5,007,000	4,597,000
Deferred Compensation	5,007,000	4,597,000
Accumulated other comprehensive earnings	51,309,000	47,225,000
Total shareholders' equity	556,963,000	508,537,000	441,688,000	415,702,000
Total liabilities and shareholders' equity	4,502,012,000	4,120,531,000
Subsidiary bank [Member]
ASSETS
Cash in banks	4,780,000	16,800,000
INTEREST-BEARING DEPOSITS IN BANKS	67,263,000	28,192,000
Unaffiliated banks [Member]
ASSETS
Cash in banks	2,000	2,000
INTEREST-BEARING DEPOSITS IN BANKS		5,026,000
Interest-bearing time deposits in unaffiliated banks	3,078,000	2,118,000
Parent company [Member]
ASSETS
Total cash and cash equivalents	72,045,000	50,020,000	31,905,000	41,605,000
Securities available-for-sale, at fair value	12,706,000	17,729,000
Investment in and advances to subsidiaries, at equity	468,502,000	446,320,000
Intangible assets	723,000	723,000
Other assets	1,961,000	2,009,000
Total assets	559,015,000	518,919,000
LIABILITIES AND SHAREHOLDERS' EQUITY
Total liabilities	2,052,000	10,382,000
SHAREHOLDERS' EQUITY:
Common stock	315,000	315,000
Capital surplus	277,412,000	276,126,000
Retained earnings	227,927,000	184,871,000
Treasury shares	(5,007,000)	(4,597,000)
Deferred Compensation	5,007,000	4,597,000
Accumulated other comprehensive earnings	51,309,000	47,225,000
Total shareholders' equity	556,963,000	508,537,000
Total liabilities and shareholders' equity	$ 559,015,000	$ 518,919,000

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Loans and Allowance for Loan Losses - Major Classifications of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Loans [Line Items]
Commercial	$ 509,609	$ 454,087
Agricultural	68,306	68,122
Real estate	1,226,823	1,041,396
Consumer	272,428	212,310
Total	$ 2,077,166	$ 1,775,915

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Condensed Financial Information - Parent Company (Tables)

12 Months Ended

Dec. 31, 2012

Condensed Balance Sheets

Condensed Balance Sheets-December 31, 2012 and 2011

	2012			2011
ASSETS
Cash in subsidiary bank	$	4,780		$	16,800
Cash in unaffiliated banks		2			2
Interest-bearing deposits in unaffiliated bank		—			5,026
Interest-bearing deposits in subsidiary bank		67,263			28,192
Total cash and cash equivalents		72,045			50,020
Interest-bearing time deposits in unaffiliated banks		3,078			2,118
Securities available-for-sale, at fair value		12,706			17,729
Investment in and advances to subsidiaries, at equity		468,502			446,320
Intangible assets		723			723
Other assets		1,961			2,009
Total assets	$	559,015		$	518,919
LIABILITIES AND SHAREHOLDERS’ EQUITY
Total liabilities	$	2,052		$	10,382
Shareholders’ equity:
Common stock		315			315
Capital surplus		277,412			276,126
Retained earnings		227,927			184,871
Treasury shares		(5,007	)		(4,597	)
Deferred compensation		5,007			4,597
Accumulated other comprehensive earnings		51,309			47,225
Total shareholders’ equity		556,963			508,537
Total liabilities and shareholders’ equity	$	559,015		$	518,919

Condensed Statements of Earnings

Condensed Statements of Earnings-

For the Years Ended December 31, 2012, 2011 and 2010

	2012		2011		2010
Income:
Cash dividends from subsidiaries	$	58,400	$	47,350	$	41,050
Excess of earnings over dividends of subsidiary bank		17,547		22,722		20,149
Other income		2.682		2,435		1,991
		78,629		72,507		63,190
Expenses:
Salaries and employee benefits		3,668		3,493		2,833
Other operating expenses		2,338		2,199		2,068
		6,006		5,692		4,901
Earnings before income taxes		72,623		66,815		58,289
Income tax benefit		1,602		1,554		1,370
Net earnings	$	74,225	$	68,369	$	59,659

Condensed Statements of Cash Flows

Condensed Statements of Cash Flows-

For the Years Ended December 31, 2012, 2011, and 2010

	2012			2011			2010
Cash flows from operating activities:
Net earnings	$	74,225		$	68,369		$	59,659
Adjustments to reconcile net earnings to net cash provided by operating activities:
Excess of earnings over dividends of subsidiary bank		(17,547	)		(22,722	)		(20,149	)
Depreciation and amortization, net		142			187			171
Decrease in other assets		34			396			10
Increase (decrease) in liabilities		(918	)		774			(29	)
Net cash provided by operating activities		55,936			47,004			39,662
Cash flows from investing activities:
Acquisition of bank		—			—			(18,200	)
Net decrease (increase) in interest-bearing time deposits in unaffiliated banks		(960	)		2,160			(198	)
Purchase of available for sale securities		—			(5,756	)		(5,649	)
Maturities of available for securities		5,430			2,500			2,500
Purchases of bank premises and equipment		(86	)		(204	)		(59	)
Repayment from (of advances related to) investment in and advances to subsidiaries, net		(400	)		820			(200	)
Net cash used in (provided by) investing activities		3,984			(480	)		(21,806	)
Cash flows from financing activities:
Proceeds of stock issuances		824			950			790
Cash dividends paid		(38,719	)		(29,359	)		(28,346	)
Net cash used in financing activities		(37,895	)		(28,409	)		(27,556	)
Net increase (decrease) in cash and cash equivalents		22,025			18,115			(9,700	)
Cash and cash equivalents, beginning of year		50,020			31,905			41,605
Cash and cash equivalents, end of year	$	72,045		$	50,020		$	31,905

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Consolidated Statements of Earnings (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2010
EXPROPRIATION OF LAND, INCOME TAX	$ 697

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Pension and Profit Sharing Plans - Estimate of Undiscounted Projected Future Payments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
2013	$ 1,309
2014	1,393
2015	1,403
2016	1,412
2017	1,447
2018 to 2022	$ 8,214

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Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2012

Summary of Significant Accounting Policies

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

Nature of Operations

First Financial Bankshares, Inc. (a Texas corporation) (“Bankshares”, “Company”, “we” or “us”) is a financial holding company which owns all of the capital stock of one bank with 55 locations located in Texas as of December 31, 2012. The subsidiary bank is First Financial Bank, National Association, Abilene. The bank’s primary source of revenue is providing loans and banking services to consumers and commercial customers in the market area in which the subsidiary is located. In addition, the Company also owns First Financial Trust & Asset Management Company, National Association, First Financial Insurance Agency, Inc., and First Technology Services, Inc. During 2011, First Financial Bankshares of Delaware, Inc and First Financial Investments of Delaware, Inc. were merged into the Company.

A summary of significant accounting policies of Bankshares and subsidiaries applied in the preparation of the accompanying consolidated financial statements follows. The accounting principles followed by the Company and the methods of applying them are in conformity with both U. S. generally accepted accounting principles and prevailing practices of the banking industry.

The Company evaluated subsequent events for potential recognition through the date the consolidated financial statements were issued.

Use of Estimates in Preparation of Financial Statements

The preparation of financial statements in conformity with U. S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Consolidation

The accompanying consolidated financial statements include the accounts of Bankshares and its subsidiaries, all of which are wholly-owned. All significant intercompany accounts and transactions have been eliminated. Certain reclassifications have been made to 2010 and 2011 financial statements to conform to the 2012 presentation.

Consolidation of Bank Charters

Effective December 30, 2012, the Company consolidated its eleven bank charters into one charter. Regulatory, compliance and technology complexities and the opportunity for cost savings were the reasons for making this change. We expect to operate the prior eleven bank charters as regions with local management decisions with recommendations from the bank region’s advisory board to benefit the customers and communities it serves as we do currently.

Stock Split

On April 26, 2011, the Company’s Board of Directors declared a three-for-two stock split in the form of a 50% stock dividend effective for shareholders of record on May 16, 2011 that was distributed on June 1, 2011. All share and per share amounts in this report have been restated to reflect this stock split. An amount equal to the par value of the additional common shares issued pursuant to the stock split was reflected as a transfer from retained earnings to common stock on the consolidated financial statements as of and for the year ended December 31, 2011.

Increase in Authorized Shares

On April 24, 2012, the Company’s shareholders approved an amendment to the Company’s Amended and Restated Certificate of Formation to increase the number of authorized common shares to 80,000,000.

Stock Repurchase

On October 26, 2011, the Company’s Board of Directors authorized the repurchase of up to 750,000 shares of its common stock through September 30, 2014. The stock buyback plan authorizes management to repurchase the stock at such time as repurchases are considered beneficial to stockholders. Any repurchase of stock will be made through the open market, block trades or in privately negotiated transactions in accordance with applicable laws and regulations. Under the repurchase plan, there is no minimum number of shares that the Company is required to repurchase. Through December 31, 2012, no shares have been repurchased under this authorization.

Investment Securities

The Company records its available-for-sale and trading securities portfolio at fair value.

Management classifies debt and equity securities as held-to-maturity, available-for-sale, or trading based on its intent. Debt securities that management has the positive intent and ability to hold to maturity are classified as held-to-maturity and recorded at cost, adjusted for amortization of premiums and accretion of discounts, which are recognized as adjustments to interest income using the interest method. Securities not classified as held-to-maturity or trading are classified as available-for-sale and recorded at estimated fair value, with all unrealized gains and unrealized losses judged to be temporary, net of deferred income taxes, excluded from earnings and reported in the consolidated statements of comprehensive earnings. Available- for-sale securities that have unrealized losses that are judged other than temporary are included in gain (loss) on sale of securities and a new cost basis is established. Securities classified as trading are recorded at estimated fair value with unrealized gains and losses included in earnings.

Fair values of these securities are determined based on methodologies in accordance with current authoritative accounting guidance. Fair values are volatile and may be influenced by a number of factors, including market interest rates, prepayment speeds, discount rates, credit ratings and yield curves. Fair values for investment securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on the quoted prices of similar instruments or an estimate of fair value by using a range of fair value estimates in the market place as a result of the illiquid market specific to the type of security.

When the fair value of a security is below its amortized cost, and depending on the length of time the condition exists and the extent the fair value is below amortized cost, additional analysis is performed to determine whether an other-than-temporary impairment condition exists. Available-for-sale and held-to-maturity securities are analyzed quarterly for possible other-than-temporary impairment. The analysis considers (i) whether we have the intent to sell our securities prior to recovery and/or maturity, (ii) whether it is more likely than not that we will have to sell our securities prior to recovery and/or maturity, (iii) the length of time and extent to which the fair value has been less than costs, and (iv) the financial condition of the issuer. Often, the information available to conduct these assessments is limited and rapidly changing, making estimates of fair value subject to judgment. If actual information or conditions are different than estimated, the extent of the impairment of the security may be different than previously estimated, which could have a material effect on the Company’s results of operations and financial condition.

The Company’s investment portfolio consists of traditional investments, substantially in U. S. Treasury securities, obligations of U. S. government sponsored-enterprises and agencies, mortgage pass-through securities, corporate bonds and general obligation or revenue based municipal bonds. Pricing for such securities is generally readily available and transparent in the market. The Company utilizes independent third party pricing services to value its investment securities. The Company reviews the prices supplied by the independent pricing services as well as the underlying pricing methodologies for reasonableness and to ensure such prices are aligned with traditional pricing matrices. The Company validates quarterly, on a sample basis, prices supplied by the independent pricing services by comparison to prices obtained from other third party sources.

Loans and Allowance for Loan Losses

Loans held for investment are stated at the amount of unpaid principal, reduced by unearned income and an allowance for loan losses. Interest on loans is calculated by using the simple interest method on daily balances of the principal amounts outstanding. The Company defers and amortizes net loan origination fees and costs as an adjustment to yield. The allowance for loan losses is established through a provision for loan losses charged to expense. Loans are charged against the allowance for loan losses when management believes the collectability of the principal is unlikely.

The Company has certain lending policies and procedures in place that are designed to maximize loan income with an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis and makes changes as appropriate. Management receives and reviews periodic reports related to loan originations, quality, concentrations, delinquencies, nonperforming and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions, both by type of loan and geographic location.

Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and effectively. Underwriting standards are designed to determine whether the borrower possesses sound business ethics and practices and to evaluate current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the identified cash flows of the borrower and, secondarily, on the underlying collateral provided by the borrower. Most commercial loans are secured by the assets being financed or other business assets, such as accounts receivable or inventory and include personal guarantees.

Agricultural loans are subject to underwriting standards and processes similar to commercial loans. These agricultural loans are based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. Most agricultural loans are secured by the agriculture related assets being financed, such as farm land, cattle or equipment and include personal guarantees.

Real estate loans are also subject to underwriting standards and processes similar to commercial and agricultural loans. These loans are underwritten primarily based on projected cash flows and, secondarily, as loans secured by real estate. The repayment of real estate loans is generally largely dependent on the successful operation of the property securing the loans or the business conducted on the property securing the loan. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s real estate portfolio are generally diverse in terms of type and geographic location. This diversity helps reduce the exposure to adverse economic events that affect any single market or industry. Generally, real estate loans are owner occupied which further reduces the Company’s risk.

Consumer loan underwriting utilizes methodical credit standards and analysis to supplement the Company’s underwriting policies and procedures. The Company’s loan policy addresses types of consumer loans that may be originated and the collateral, if secured, which must be perfected. The relatively smaller individual dollar amounts of consumer loans that are spread over numerous individual borrowers also minimize the Company’s risk.

The allowance is an amount management believes is appropriate to absorb probable losses that have been incurred on existing loans as of the balance sheet date based upon management’s review and evaluation of the loan portfolio. The allowance for loan losses is comprised of three elements: (i) specific reserves determined in accordance with current authoritative accounting guidance based on probable losses on classified loans; (ii) general reserve determined in accordance with current authoritative accounting guidance that considers historical loss rates; and (iii) qualitative reserves determined in accordance with current authoritative accounting guidance based upon general economic conditions and other qualitative risk factors both internal and external to the Company. The allowance for loan losses is increased by charges to income and decreased by charge-offs (net of recoveries). Management’s periodic evaluation of the appropriateness of the allowance is based on general economic conditions, the financial condition of borrowers, the value and liquidity of collateral, delinquency, prior loan loss experience, and the results of periodic reviews of the portfolio. For purposes of determining our general reserve, the loan portfolio, less cash secured loans, government guaranteed loans and classified loans, is multiplied by the Company’s historical loss rate. Our methodology is constructed so that specific reserves are increased in response to deterioration in credit quality and a corresponding increase in risk of loss. In addition, we adjust our allowance for qualitative factors such as current local economic conditions and trends, including, without limitations, unemployment, changes in lending staff, policies and procedures, changes in credit concentrations, changes in the trends and severity of problem loans and changes in trends in volume and terms of loans. This additional qualitative reserve serves to compensate for additional areas of uncertainty inherent in our portfolio that are not reflected in our historic loss factors.

Although we believe we use the best information available to make loan loss allowance determinations, future adjustments could be necessary if circumstances or economic conditions differ substantially from the assumptions used in making our initial determinations. A further downturn in the economy and employment could result in increased levels of non-performing assets and charge-offs, increased loan provisions and reductions in income. Additionally, bank regulatory agencies periodically review our allowance for loan losses and could require additions to the loan loss allowance based on their judgment of information available to them at the time of their examination.

Accrual of interest is discontinued on a loan and payments are applied to principal when management believes, after considering economic and business conditions and collection efforts, the borrower’s financial condition is such that collection of interest is doubtful. Except consumer loans, generally all loans past due greater than 90 days, based on contractual terms, are placed on non-accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Consumer loans are generally charged-off when a loan becomes past due 90 days. For other loans in the portfolio, facts and circumstances are evaluated in making charge-off decisions.

Loans are considered impaired when, based on current information and events, it is probable we will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. If a loan is impaired, a specific reserve is recorded, if necessary. Interest payments on impaired loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Impaired loans, or portions thereof, are charged off when deemed uncollectable.

The Company’s policy requires measurement of the allowance for an impaired, collateral dependent loan based on the fair value of the collateral. Other loan impairments are measured based on the present value of expected future cash flows or the loan’s observable market price. At December 31, 2012 and 2011, all significant impaired loans have been determined to be collateral dependent and the allowance for loss has been measured utilizing the estimated fair value of the collateral.

From time to time, the Company modifies its loan agreement with a borrower. A modified loan is considered a troubled debt restructuring when two conditions are met: (i) the borrower is experiencing financial difficulty and (ii) concessions are made by the Company that would not otherwise be considered for a borrower with similar credit risk characteristics. Modifications to loan terms may include a lower interest rate, a reduction of principal, or a longer term to maturity. To date, troubled debt restructurings have been such that, after considering economic and business conditions and collection efforts, the collection of interest is doubtful and therefore the loan has been placed on non-accrual. Each of these loans is evaluated for impairment and a specific reserve is recorded based on probable losses, taking into consideration the related collateral and modified loan terms and cash flow. As of December 31, 2012 and 2011, all of the Company’s troubled debt restructured loans are included in the non-accrual totals.

The Company originates certain mortgage loans for sale in the secondary market. Accordingly, these loans are classified as held for sale and are carried at the lower of cost or fair value on an aggregate basis. The mortgage loan sales contracts contain indemnification clauses should the loans default, generally in the first three to six months, or if documentation is determined not to be in compliance with regulations. The Company’s historic losses as a result of these indemnities have been insignificant.

Other Real Estate

Other real estate is foreclosed property held pending disposition and is initially recorded at fair value, less estimated costs to sell. At foreclosure, if the fair value of the real estate, less estimated costs to sell, is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for loan losses. Any subsequent reduction in value is recognized by a charge to income. Operating and holding expenses of such properties, net of related income, and gains and losses on their disposition are included in net gain (loss) on sale of foreclosed assets as incurred.

Bank Premises and Equipment

Bank premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed principally on a straight-line basis over the estimated useful lives of the related assets. Leasehold improvements are amortized over the life of the respective lease or the estimated useful lives of the improvements, whichever is shorter.

Business Combinations, Goodwill and Other Intangible Assets

The Company accounts for all business combinations under the purchase method of accounting. Tangible and intangible assets and liabilities of the acquired entity are recorded at fair value. Intangible assets with finite useful lives represent the future benefit associated with the acquisition of the core deposits and are amortized over seven years, utilizing a method that approximates the expected attrition of the deposits. Goodwill and intangible assets with indefinite lives are not amortized, but rather tested annually for impairment as of June 30 each year and totaled $71,865,000 at both December 31, 2012 and 2011. There was no impairment recorded for the years ended December 31, 2012, 2011 and 2010.

The carrying amount of goodwill arising from acquisitions that qualify as an asset purchase for federal income tax purposes was approximately $49,609,000 at both December 31, 2012 and 2011, and is deductible for federal income tax purposes.

Securities Sold Under Agreements To Repurchase

Securities sold under agreements to repurchase, which are classified as short-term borrowings, generally mature within one to four days from the transaction date. Securities sold under agreements to repurchase are reflected at the amount of the cash received in connection with the transaction. The Company may be required to provide additional collateral based on the estimated fair value of the underlying securities.

Segment Reporting

The Company has determined that its banking regions meet the aggregation criteria of the current authoritative accounting guidance since each of its banking regions offers similar products and services, operates in a similar manner, has similar customers and reports to the same regulatory authority, and therefore operates one line of business (community banking) located in a single geographic area (Texas).

Statements of Cash Flows

For purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks, including interest-bearing deposits in banks with original maturity of 90 days or less, and federal funds sold.

Accumulated Other Comprehensive Income (Loss)

Unrealized gains on the Company’s available-for-sale securities (after applicable income tax expense) totaling $59,669,000 and $54,568,000 at December 31, 2012 and 2011, respectively, and the minimum pension liability totaled (after applicable income tax benefit) totaling $8,360,000 and $7,343,000 at December 31, 2012 and 2011, respectively, are included in accumulated other comprehensive income.

Income Taxes

The Company’s provision for income taxes is based on income before income taxes adjusted for permanent differences between financial reporting and taxable income. Deferred tax assets and liabilities are determined using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws.

Stock Based Compensation

The Company grants stock options for a fixed number of shares to employees with an exercise price equal to the fair value of the shares at the grant date. The Company recorded stock option expense totaling $334,000, $427,000 and $387,000 for the years ended December 31, 2012, 2011 and 2010, respectively.

Advertising Costs

Advertising costs are expensed as incurred.

Per Share Data

Net earnings per share (“EPS”) are computed by dividing net earnings by the weighted average number of common stock shares outstanding during the period. The Company calculates dilutive EPS assuming all outstanding options to purchase common stock have been exercised at the beginning of the year (or the time of issuance, if later.) The dilutive effect of the outstanding options is reflected by application of the treasury stock method, whereby the proceeds from the exercised options are assumed to be used to purchase common stock at the average market price during the period. The following table reconciles the computation of basic EPS to dilutive EPS:

	Net Earnings (in thousands)		Weighted Average Shares		Per Share Amount
For the year ended December 31, 2012
Net earnings per share, basic	$	74,225		31,480,155	$	2.36
Effect of stock options		—		21,112		—
Net earnings per share, assuming dilution	$	74,225		31,501,267	$	2.36
For the year ended December 31, 2011:
Net earnings per share, basic	$	68,369		31,443,712	$	2.17
Effect of stock options		—		18,252		—
Net earnings per share, assuming dilution	$	68,369		31,461,964	$	2.17
For the year ended December 31, 2010:
Net earnings per share, basic	$	59,659		31,291,486	$	1.91
Effect of stock options		—		28,077		—
Net earnings per share, assuming dilution	$	59,659		31,319,563	$	1.91

Recently Issued Authoritative Accounting Guidance

In 2011, the Financial Accounting Standards Board (the “FASB”) amended its authoritative guidance to require that all changes in stockholders’ equity be presented in either a single continuous statement of comprehensive income or in two separate but consecutive statements. Additionally, the authoritative guidance requires entities to present, on the face of the financial statements, reclassification adjustments for items that are reclassified from other comprehensive income to net income in the statement or statements where the components of net income and the components of other comprehensive income are presented. The option to present components of other comprehensive income as part of the statement of changes in stockholder’s equity was eliminated. The new guidance was effective January 1, 2012, although certain provisions in the guidance have been deferred to allow the FASB time to re-deliberate. The new guidance did not have a significant impact on the Company’s financial statements.

In 2011, the FASB amended its authoritative guidance related to goodwill impairment to give entities the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary. However, if an entity concludes otherwise, then it is required to perform the first step of the two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit. The new guidance was effective for annual and interim impairment tests in 2012, and did not have a significant impact on the Company’s financial statements.

In 2011, the FASB amended its authoritative guidance related to fair value measurements and disclosures to converge the fair value measurement guidance in U.S. generally accepted accounting principles and International Financial Reporting Standards. The amendment clarifies the application of existing fair value measurement requirements, changes certain principles in existing literature and requires additional fair value disclosures. The new guidance was effective January 1, 2012 and did not have a significant impact on the Company’s financial statement, except for additional disclosures.

In 2011, the FASB amended its authoritative guidance related to offsetting assets and liabilities to require an entity to disclose both gross and net information about financial instruments, such as sales and repurchase agreements and reverse sales and repurchase agreements and securities borrowing/lending arrangements, and derivative instruments that are eligible for offset in the statement of financial position and/or subject to a master netting arrangement or similar agreement. The new guidance is effective for annual and interim periods beginning on January 1, 2013, and is not expected to have a significant impact on the Company’s financial statements.

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Loans and Allowance for Loan Losses - Schedule of Allowance for Loan Loss by Portfolio Segment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	$ 12,329	$ 13,997
Loans collectively evaluated for impairment	22,510	20,318
Total allowance for loan losses	34,839	34,315	31,106
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	3,253	4,647
Loans collectively evaluated for impairment	4,090	5,017
Total allowance for loan losses	7,343	9,664	7,745
Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	388	758
Loans collectively evaluated for impairment	1,153	724
Total allowance for loan losses	1,541	1,482	2,299
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	8,380	8,310
Loans collectively evaluated for impairment	15,683	13,223
Total allowance for loan losses	24,063	21,533	19,101
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	308	282
Loans collectively evaluated for impairment	1,584	1,354
Total allowance for loan losses	$ 1,892	$ 1,636	$ 1,961

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Pension and Profit Sharing Plans - Benefit Obligation Activity and Fair Value of Plan Assets and Statement of Funded Status (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	$ 1,113	$ 1,139	$ 1,159
Employer contributions	2,000	1,500
Fair value of plan assets at December 31	21,110
Reconciliation of benefit obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at January 1	24,608	22,263
Interest cost on projected benefit obligation	1,113	1,139
Actuarial loss (gain)	3,470	2,320
Benefits paid	(1,353)	(1,114)
Benefit obligation at December 31	27,838	24,608
Reconciliation of fair value of plan assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1	18,076	17,184
Actual return on plan assets	2,387	506
Employer contributions	2,000	1,500
Benefits paid	(1,354)	(1,114)
Fair value of plan assets at December 31	21,110	18,076
Funded status at December 31	$ (6,728)	$ (6,532)

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Line of Credit - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Line of Credit Facility [Line Items]
Revolving line of credit, permitted	$ 25.0
Line of credit, maturity date	Jun. 30, 2013
Term facility payable (in years)	Five
Interest paid on basis points	Prime plus 50 basis points or LIBOR plus 250 basis points
Percentage of restricted dividend payments	55.00%
Line of credit	$ 0	$ 0
Prime rate basis [Member]
Line of Credit Facility [Line Items]
Interest rate spread above benchmark rate	0.50%
LIBOR basis [Member]
Line of Credit Facility [Line Items]
Interest rate spread above benchmark rate	2.50%

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Cash Flow Information

12 Months Ended

Dec. 31, 2012

Cash Flow Information

18. CASH FLOW INFORMATION:

Supplemental information on cash flows and noncash transactions is as follows (in thousands):

	Year Ended December 31,
	2012		2011		2010
Supplemental cash flow information:
Interest paid	$	5,419	$	8,664	$	13,802
Federal income taxes paid		20,779		18,942		18,844
Schedule of noncash investing and financing activities:
Assets acquired through foreclosure		2,459		6,013		11,017
Investment securities purchased but not settled		8,589		21,325		14,945

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Extraordinary Item - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2010	Dec. 31, 2012	Dec. 31, 2010
Extraordinary Item [Line Items]
Income from an extraordinary item net of tax	$ 1,300,000		$ 1,296,000
Receipt from Texas Department of Transportation for land and damages to our existing property		2,200,000
Net gain of before income taxes		$ 2,000,000

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Pension and Profit Sharing Plans (Tables)

12 Months Ended

Dec. 31, 2012

Benefit Obligation Activity and Fair Value of Plan Assets and Statement of Funded Status

Using an actuarial measurement date of December 31, 2012 and 2011, respectively, benefit obligation activity and fair value of plan assets for the years ended December 31, 2012 and 2011, and a statement of the funded status as of December 31, 2012 and 2011, are as follows (in thousands):

	2012			2011
Reconciliation of benefit obligations:
Benefit obligation at January 1	$	24,608		$	22,263
Interest cost on projected benefit obligation		1,113			1,139
Actuarial loss		3,470			2,320
Benefits paid		(1,353	)		(1,114	)
Benefit obligation at December 31		27,838			24,608
Reconciliation of fair value of plan assets:
Fair value of plan assets at January 1	$	18,077		$	17,184
Actual return on plan assets		2,387			506
Employer contributions		2,000			1,500
Benefits paid		(1,354	)		(1,114	)
Fair value of plan assets at December 31		21,110			18,076
Funded status	$	(6,728	)	$	(6,532	)

Component Of Accumulated Other Comprehensive Earnings

Amounts recognized as a component of accumulated other comprehensive earnings as of year-end that have not been recognized as a component of the net period benefit cost of the Company’s defined benefit pension plan are as follows (in thousands):

	2012			2011
Net actuarial loss	$	(13,184	)	$	(11,620	)
Deferred tax benefit		4,824			4,277
Amounts included in accumulated other comprehensive earnings, net of tax	$	(8,360	)	$	(7,343	)

Net Periodic Pension Cost

Net periodic pension cost for the years ended December 31, 2012, 2011, and 2010, included (in thousands):

	Year Ended December 31,
	2012			2011			2010
Service cost - benefits earned during the period	$	—		$	—		$	—
Interest cost on projected benefit obligation		1,113			1,139			1,159
Expected return on plan assets		(1,140	)		(1,220	)		(1,092	)
Amortization of unrecognized net loss		659			434			416
Net periodic pension cost	$	632		$	353		$	483

Benefit Obligations and Net Periodic Pension Cost and Rate of Return on Plan Assets

The following table sets forth the rates used in the actuarial calculations of the present value of benefit obligations and net periodic pension cost and the rate of return on plan assets:

	2012			2011			2010
Weighted average discount rate		3.75	%		4.65	%		5.25	%
Expected long-term rate of return on assets		6.25	%		6.75	%		6.75	%

Pension Plan and Targeted Allocation Percentage

The major type of plan assets in the pension plan and the targeted allocation percentage as of December 31, 2012 and 2011 is as follows:

	December 31, 2012 Allocation			December 31, 2011 Allocation			Targeted Allocation
Equity securities		74	%		82	%		75	%
Debt securities		24	%		16	%		25	%
Cash and equivalents		2	%		2	%		—

Breakdown by Level

The breakdown by level is as follows (in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Money market fund	$	513	$	—	$	—	$	513
Obligations of state and political subdivisions		—		708		—		708
Corporate bonds		—		1,833		—		1,833
Mortgage-backed securities		—		1,018		—		1,018
Corporate stocks and mutual funds		17,038		—		—		17,038
Total	$	17,551	$	3,559	$	—	$	21,110

Estimate of Undiscounted Projected Future Payments

An estimate of the undiscounted projected future payments to eligible participants for the next five years and the following five years in the aggregate is as follows (in thousands):

Year Ending December 31,
2013	$	1,309
2014		1,393
2015		1,403
2016		1,412
2017		1,447
2018 to 2022	$	8,214

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Financial Instruments with Off-Balance-Sheet Risk

12 Months Ended

Dec. 31, 2012

Financial Instruments with Off-Balance-Sheet Risk

11. FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK:

The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include unfunded lines of credit, commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets.

The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for unfunded lines of credit, commitments to extend credit and standby letters of credit is represented by the contractual notional amount of these instruments. The Company generally uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments.

	Contract or Notional Amount at December 31, 2012 (in thousands)
Financial instruments whose contract amounts represent credit risk:
Unfunded lines of credit	$	335,654
Unfunded commitments to extend credit		75,604
Standby letters of credit		19,985
	$	431,243

Unfunded lines of credit and commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, property, plant, and equipment, livestock, and income-producing commercial properties.

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The average collateral value held on letters of credit usually exceeds the contract amount.

The Company has no other significant off-balance sheet arrangements or transactions that would expose the Company to liability that is not reflected in the consolidated financial statements.