10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

☒ Quarterly Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

For the quarterly period ended March 31, 2018

☐ Transition Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

For the transition period from to

Commission file number 001-31940

F.N.B. CORPORATION

(Exact name of registrant as specified in its charter)

Pennsylvania	25-1255406
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

One North Shore Center, 12 Federal Street, Pittsburgh, PA	15212
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: 800-555-5455

(Former name, former address and former fiscal year, if changed since last report)

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  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer	☒	Accelerated Filer	☐
Non-accelerated Filer	☐	Smaller reporting company	☐
		Emerging Growth Company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

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

APPLICABLE ONLY TO CORPORATE ISSUERS:

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	Outstanding at	April 30, 2018
Common Stock, $0.01 Par Value	323,851,407	Shares

F.N.B. CORPORATION

FORM 10-Q

March 31, 2018

INDEX

		PAGE
PART I – FINANCIAL INFORMATION
	Glossary of Acronyms and Terms	3
Item 1.	Financial Statements
	Consolidated Balance Sheets	4
	Consolidated Statements of Income	5
	Consolidated Statements of Comprehensive Income	6
	Consolidated Statements of Stockholders’ Equity	7
	Consolidated Statements of Cash Flows	8
	Notes to Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	52
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	75
Item 4.	Controls and Procedures	75
PART II – OTHER INFORMATION
Item 1.	Legal Proceedings	76
Item 1A.	Risk Factors	76
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	76
Item 3.	Defaults Upon Senior Securities	76
Item 4.	Mine Safety Disclosures	76
Item 5.	Other Information	76
Item 6.	Exhibits	77
Signatures		77

2

Glossary of Acronyms and Terms

AFS Available for sale

ALCO Asset/Liability Committee

AOCI Accumulated other comprehensive income

ASC Accounting Standards Codification

ASU Accounting Standards Update

BOLI Bank owned life insurance

Basel III Basel III Capital Rules

EVE Economic value of equity

FDIC Federal Deposit Insurance Corporation

FHLB Federal Home Loan Bank

FNB F.N.B. Corporation

FNBPA First National Bank of Pennsylvania

FRB Board of Governors of the Federal Reserve System

FTE Fully taxable equivalent

FVO Fair value option

GAAP U.S. generally accepted accounting principles

HTM Held to maturity

IRLC Interest rate lock commitments

LCR Liquidity Coverage Ratio

LIBOR London Inter-bank Offered Rate

MCH Months of Cash on Hand

MSR Mortgage servicing rights

OCC Office of the Comptroller of the Currency

OREO Other real estate owned

OTTI Other-than-temporary impairment

Regency Regency Finance Company

SBA Small Business Administration

SEC Securities and Exchange Commission

TCJA Tax Cuts and Jobs Act of 2017

TDR Troubled debt restructuring

TPS Trust preferred securities

UST U.S. Department of the Treasury

YDKN Yadkin Financial Corporation

3

PART I – FINANCIAL INFORMATION

ITEM 1.    FINANCIAL STATEMENTS

F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

Dollars in thousands, except share and per share data

	March 31, 2018			December 31, 2017
	(Unaudited)
Assets
Cash and due from banks	$	325,101		$	408,718
Interest bearing deposits with banks	61,228			70,725
Cash and Cash Equivalents	386,329			479,443
Securities available for sale	2,927,463			2,764,562
Debt securities held to maturity (fair value of $3,131,964 and $3,218,379)	3,224,000			3,242,268
Loans held for sale (includes$21,610 and $56,458 measured at fair value) (1)	37,982			92,891
Loans and leases, net of unearned income of $43,791 and $50,680	21,262,397			20,998,766
Allowance for credit losses	(179,247		)	(175,380		)
Net Loans and Leases	21,083,150			20,823,386
Premises and equipment, net	333,424			336,540
Goodwill	2,251,281			2,249,188
Core deposit and other intangible assets, net	87,858			92,075
Bank owned life insurance	529,843			526,818
Other assets	791,023			810,464
Total Assets	$	31,652,353		$	31,417,635
Liabilities
Deposits:
Non-interest-bearing demand	$	5,748,568		$	5,720,030
Interest-bearing demand	9,407,111			9,571,038
Savings	2,600,151			2,488,178
Certificates and other time deposits	4,741,259			4,620,479
Total Deposits	22,497,089			22,399,725
Short-term borrowings	3,802,480			3,678,337
Long-term borrowings	659,890			668,173
Other liabilities	259,441			262,206
Total Liabilities	27,218,900			27,008,441
Stockholders’ Equity
Preferred stock - $0.01 par value; liquidation preference of $1,000 per share
Authorized – 20,000,000 shares
Issued – 110,877 shares	106,882			106,882
Common stock - $0.01 par value
Authorized – 500,000,000 shares
Issued – 325,319,503 and 325,095,055 shares	3,255			3,253
Additional paid-in capital	4,037,847			4,033,567
Retained earnings	413,340			367,658
Accumulated other comprehensive loss	(108,724		)	(83,052		)
Treasury stock –1,632,510 and 1,629,915 shares at cost	(19,147		)	(19,114		)
Total Stockholders’ Equity	4,433,453			4,409,194
Total Liabilities and Stockholders’ Equity	$	31,652,353		$	31,417,635

(1) Amount represents loans for which we have elected the fair value option. See Note 18.

See accompanying Notes to Consolidated Financial Statements (unaudited)

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F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

Dollars in thousands, except per share data

Unaudited

	Three Months Ended March 31,
	2018		2017
Interest Income
Loans and leases, including fees	$	239,094	$	168,629
Securities:
Taxable	26,879		22,466
Tax-exempt	6,594		3,401
Dividends	—		9
Other	360		188
Total Interest Income	272,927		194,693
Interest Expense
Deposits	26,469		11,740
Short-term borrowings	15,207		6,674
Long-term borrowings	5,146		3,527
Total Interest Expense	46,822		21,941
Net Interest Income	226,105		172,752
Provision for credit losses	14,495		10,850
Net Interest Income After Provision for Credit Losses	211,610		161,902
Non-Interest Income
Service charges	30,077		24,581
Trust services	6,448		5,747
Insurance commissions and fees	5,135		5,141
Securities commissions and fees	4,319		3,623
Capital markets income	5,214		3,847
Mortgage banking operations	5,529		3,790
Bank owned life insurance	3,285		2,153
Net securities gains	—		2,625
Other	7,496		3,609
Total Non-Interest Income	67,503		55,116
Non-Interest Expense
Salaries and employee benefits	89,326		73,578
Net occupancy	15,568		11,349
Equipment	14,465		9,630
Amortization of intangibles	4,218		3,098
Outside services	14,725		13,043
FDIC insurance	8,834		5,387
Supplies	1,684		2,196
Bank shares and franchise taxes	3,452		2,980
Merger-related	—		52,724
Other	18,811		13,570
Total Non-Interest Expense	171,083		187,555
Income Before Income Taxes	108,030		29,463
Income taxes	21,268		6,484
Net Income	86,762		22,979
Preferred stock dividends	2,010		2,010
Net Income Available to Common Stockholders	$	84,752	$	20,969
Earnings per Common Share
Basic	$	0.26	$	0.09
Diluted	$	0.26	$	0.09
Cash Dividends per Common Share	$	0.12	$	0.12

See accompanying Notes to Consolidated Financial Statements (unaudited)

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F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

Dollars in thousands

Unaudited

	Three Months Ended March 31,
	2018			2017
Net income	$	86,762		$	22,979
Other comprehensive (loss) income:
Securities available for sale:
Unrealized (losses) gains arising during the period, net of tax (benefit) expense of $(8,467) and $3,248	(29,787		)	6,032
Reclassification adjustment for gains included in net income, net of tax expense of $0 and $424	—			(787		)
Derivative instruments:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $1,082and $(550)	3,804			(1,022		)
Reclassification adjustment for gains included in net income, net of tax expense of$49 and $125	(173		)	(233		)
Pension and postretirement benefit obligations:
Unrealized (losses) gains arising during the period, net of tax (benefit) expense of $136and$221	484			410
Other comprehensive (loss) income	(25,672		)	4,400
Comprehensive income	$	61,090		$	27,379

See accompanying Notes to Consolidated Financial Statements (unaudited)

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F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

Dollars in thousands, except per share data

Unaudited

	Preferred Stock		Common Stock		Additional Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Treasury Stock			Total
Balance at January 1, 2017	$	106,882	$	2,125	$	2,234,366	$	304,397		$	(61,369	)	$	(14,784	)	$	2,571,617
Comprehensive income							22,979			4,400						27,379
Dividends declared:
Preferred stock							(2,010		)							(2,010		)
Common stock: $0.12/share							(25,548		)							(25,548		)
Issuance of common stock			5		2,117								(2,925		)	(803		)
Issuance of common stock - acquisitions			1,116		1,780,891											1,782,007
Restricted stock compensation					1,394											1,394
Tax benefit of stock-based compensation					1,759											1,759
Balance at March 31, 2017	$	106,882	$	3,246	$	4,020,527	$	299,818		$	(56,969	)	$	(17,709	)	$	4,355,795
Balance at January 1, 2018	$	106,882	$	3,253	$	4,033,567	$	367,658		$	(83,052	)	$	(19,114	)	$	4,409,194
Comprehensive income							86,762			(25,672		)				61,090
Dividends declared:
Preferred stock							(2,010		)							(2,010		)
Common stock: $0.12/share							(39,070		)							(39,070		)
Issuance of common stock			2		2,341								(33		)	2,310
Restricted stock compensation					1,939											1,939
Balance at March 31, 2018	$	106,882	$	3,255	$	4,037,847	$	413,340		$	(108,724	)	$	(19,147	)	$	4,433,453

See accompanying Notes to Consolidated Financial Statements (unaudited)

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F.N.B. CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

Dollars in thousands

Unaudited

	Three Months Ended March 31,
	2018			2017
Operating Activities
Net income	$	86,762		$	22,979
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	23,676			17,276
Provision for credit losses	14,495			10,850
Deferred tax expense	1,864			11,224
Net securities gains	—			(2,625		)
Tax benefit of stock-based compensation	(233		)	(720		)
Loans originated for sale	(208,990		)	(182,771		)
Loans sold	269,235			135,405
Gain on sale of loans	(5,336		)	(3,344		)
Net change in:
Interest receivable	(828		)	(1,527		)
Interest payable	282			444
Bank owned life insurance	(3,093		)	(1,962		)
Other, net	32,559			13,403
Net cash flows provided by operating activities	210,393			18,632
Investing Activities
Net change in loans and leases	(284,196		)	(208,958		)
Securities available for sale:
Purchases	(357,784		)	(492,227		)
Sales	—			549,460
Maturities	153,401			119,867
Debt securities held to maturity:
Purchases	(63,918		)	(531,560		)
Sales	—			1,574
Maturities	80,492			119,324
Increase in premises and equipment	(9,347		)	(23,186		)
Net cash received in business combinations	—			197,682
Net cash flows used in investing activities	(481,352		)	(268,024		)
Financing Activities
Net change in:
Demand (non-interest bearing and interest bearing) and savings accounts	(23,416		)	73,291
Time deposits	122,040			11,421
Short-term borrowings	124,143			286,765
Proceeds from issuance of long-term borrowings	10,122			65,998
Repayment of long-term borrowings	(18,213		)	(82,506		)
Net proceeds from issuance of common stock	4,249			957
Cash dividends paid:
Preferred stock	(2,010		)	(2,010		)
Common stock	(39,070		)	(25,548		)
Net cash flows provided by financing activities	177,845			328,368
Net Increase (Decrease) in Cash and Cash Equivalents	(93,114		)	78,976
Cash and cash equivalents at beginning of period	479,443			371,407
Cash and Cash Equivalents at End of Period	$	386,329		$	450,383

See accompanying Notes to Consolidated Financial Statements (unaudited)

8

F.N.B. CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

March 31, 2018

The terms “FNB,” “the Corporation,” “we,” “us” and “our” throughout this Report mean F.N.B. Corporation and our consolidated subsidiaries, unless the context indicates that we refer only to the parent company, F.N.B. Corporation. When we refer to "FNBPA" in this Report, we mean our only bank subsidiary, First National Bank of Pennsylvania, and its subsidiaries.

NATURE OF OPERATIONS

F.N.B. Corporation, headquartered in Pittsburgh, Pennsylvania, is a diversified financial services company operating in eight states. Through FNBPA, we have over 150 years of serving the financial and banking needs of our customers. We hold a significant retail deposit market share in attractive markets including: Pittsburgh, Pennsylvania; Baltimore, Maryland; Cleveland, Ohio; and Charlotte, Raleigh-Durham and the Piedmont Triad (Winston-Salem, Greensboro and High Point) in North Carolina. As of March 31, 2018, we had 417 banking offices throughout Pennsylvania, Ohio, Maryland, West Virginia, North Carolina and South Carolina. We provide a full range of commercial banking, consumer banking and wealth management solutions through our subsidiary network which is led by our largest affiliate, FNBPA. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, business credit, capital markets and lease financing. Consumer banking provides a full line of consumer banking products and services including deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services. Wealth management services include fiduciary and brokerage services, asset management, private banking and insurance. We also operate Regency Finance Company, which had 77 consumer finance offices in Pennsylvania, Ohio, Kentucky and Tennessee as of March 31, 2018.

NOTE 1.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

Our accompanying Consolidated Financial Statements and these Notes to the Financial Statements include subsidiaries in which we have a controlling financial interest. We own and operate FNBPA, First National Trust Company, First National Investment Services Company, LLC, F.N.B. Investment Advisors, Inc., First National Insurance Agency, LLC, Regency, Bank Capital Services, LLC and F.N.B. Capital Corporation, LLC, and include results for each of these entities in the accompanying Consolidated Financial Statements.

The accompanying Consolidated Financial Statements include all adjustments that are necessary, in the opinion of management, to fairly reflect our financial position and results of operations in accordance with U.S. generally accepted accounting principles. All significant intercompany balances and transactions have been eliminated. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on our net income and stockholders’ equity. Events occurring subsequent to the date of the March 31, 2018 Balance Sheet have been evaluated for potential recognition or disclosure in the Consolidated Financial Statements through the date of the filing of the Consolidated Financial Statements with the Securities and Exchange Commission.

Certain information and Note disclosures normally included in Consolidated Financial Statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. The interim operating results are not necessarily indicative of operating results FNB expects for the full year. These interim unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in FNB’s 2017 Annual Report on Form 10-K filed with the SEC on February 28, 2018. For a detailed description of our significant accounting policies, see Note 1 "Summary of Significant Accounting Policies" in the 2017 Form 10-K. The accounting policies presented below have been added or amended for newly material items or the adoption of new accounting standards.

Use of Estimates

Our accounting and reporting policies conform with GAAP. The preparation of Financial Statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying Notes. Actual results could materially differ from those estimates. Material estimates that are particularly

9

susceptible to significant changes include the allowance for credit losses, accounting for acquired loans, fair value of financial instruments, goodwill and other intangible assets, income taxes and deferred tax assets and litigation.

Revenue from Contracts with Customers

We earn certain revenues from contracts with customers. These revenues are recognized when control of the promised services is transferred to the customers in an amount that reflects the consideration we expect to be entitled to in an exchange for those services.

In determining the appropriate revenue recognition for our contracts with customers, we consider whether the contract has commercial substance and is approved by both parties with identifiable contractual rights, payment terms, and the collectability of consideration is probable. Generally, we satisfy our performance obligations upon the completion of services at the amount to which we have the right to invoice or charge under contracts with an original expected duration of one year or less. We apply this guidance on a portfolio basis to contracts with similar characteristics and for which we believe the results would not differ materially from applying this guidance to individual contracts.

Our services provided under contracts with customers are transferred at the point in time when the services are rendered. Generally, we do not defer incremental direct costs to obtain contracts with customers that would be amortized in one year or less under the practical expedient. These costs are recognized as expense, primarily salary and benefit expense, in the period incurred.

Deposit Services.We recognize revenue on deposit services based on published fees for services provided. Demand and savings deposit customers have the right to cancel their depository arrangements and withdraw their deposited funds at any time without prior notice. When services involve deposited funds that can be retrieved by customers without penalties, we consider the service contract term to be day-to-day, where each day represents the renewal of the contract. The contract does not extend beyond the services performed and revenue is recognized at the end of the contract term (daily) as the performance obligation is satisfied.

No deposit services fees exist for long-term deposit products beyond early withdrawal penalties, which are earned on these products at the time of early termination.

Revenue from deposit services fees are reduced where we have a history of waived or reduced fees by customer request or due to a customer service issue, by historical experience, or another acceptable method in the same period as the related revenues. Revenues from deposit services are reported in the Consolidated Statements of Income as service charges and in the Community Banking segment as non-interest income.

Wealth Management Services.Wealth advisory and trust services are provided on a month-to-month basis and invoiced as services are rendered. Fees are based on a fixed amount or a scale based on the level of services provided or assets under management. The customer has the right to terminate their services agreement at any time. We determine the value of services performed based on the fee schedule in effect at the time the services are performed. Revenues from wealth advisory and trust services are reported in the Consolidated Statements of Income as trust services and securities commissions and fees, and in the Wealth segment as non-interest income.

Insurance Services.Insurance services include full-service insurance brokerage services offering numerous lines of commercial and personal insurance through major carriers to businesses and individuals within our geographic markets. We recognize revenue on insurance contracts in effect based on contractually specified commission payments on premiums that are paid by the customer to the insurance carrier. Contracts are cancellable at any time and we have no performance obligation to the customers beyond the time the insurance is placed into effect. Revenues from insurance services are reported in the Consolidated Statements of Income as insurance commissions and fees, and in the Insurance segment as non-interest income.

Debt Securities

Debt securities comprise a significant portion of our Consolidated Balance Sheets. Such securities can be classified as trading, HTM or AFS. As of March 31, 2018 and 2017, we did not hold any trading debt securities.

Debt securities HTM are the securities that management has the positive intent and ability to hold until their maturity. Such securities are carried at cost, adjusted for related amortization of premiums and accretion of discounts through interest income from securities, and subject to evaluation for OTTI.

10

Debt securities that are not classified as trading or HTM are classified as AFS. Such securities are carried at fair value with net unrealized gains and losses deemed to be temporary and OTTI attributable to non-credit factors reported separately as a component of other comprehensive income, net of tax.

We evaluate our debt securities in a loss position for OTTI on a quarterly basis at the individual security level based on our intent to sell. If we intend to sell the debt security or it is more likely than not we will be required to sell the security before recovery of its amortized cost basis, OTTI must be recognized in earnings equal to the entire difference between the investments’ amortized cost basis and its fair value. If we do not intend to sell the debt security and it is not more likely than not that we will be required to sell the security before recovery of its amortized cost basis, OTTI must be separated into the amount representing credit loss and the amount related to all other market factors. The amount related to credit loss will be recognized in earnings. The amount related to other market factors will be recognized in other comprehensive income, net of applicable taxes.

We perform our OTTI evaluation process in a consistent and systematic manner and include an evaluation of all available evidence. This process considers factors such as length of time and anticipated recovery period of the impairment, recent events specific to the issuer and recent experience regarding principal and interest payments.

Low Income Housing Tax Credit (LIHTC) Partnerships

We invest in various affordable housing projects that qualify for LIHTCs. The net investments are recorded in other assets on the Consolidated Balance Sheets. These investments generate a return through the realization of federal tax credits. We use the proportional amortization method to account for a majority of our investments in these entities. LIHTCs that do not meet the requirements of the proportional amortization method are recognized using the equity method. Our net investment in LIHTCs was $26.1 million and $20.9 million at March 31, 2018 and December 31, 2017, respectively. Our unfunded commitments in LIHTCs were $60.1 million and $67.2 million at March 31, 2018 and December 31, 2017, respectively.

NOTE 2.    NEW ACCOUNTING STANDARDS

The following table summarizes accounting pronouncements issued by the Financial Accounting Standards Board that we recently adopted or will be adopting in the future.

Standard	Description	Required Date of Adoption	Financial Statements Impact
Derivative and Hedging Activities
ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities	This Update improves the financial reporting of hedging to better align with a company’s risk management activities. In addition, this Update makes certain targeted improvements to simplify the application of the current hedge accounting guidance.	January 1, 2019 Early adoption is permitted.	This Update is to be applied using a modified retrospective method. The presentation and disclosure guidance are applied prospectively. We are currently assessing the potential impact to our Consolidated Financial Statements.
Securities
ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities	This Update shortens the amortization period for the premium on certain purchased callable securities to the earliest call date. The accounting for purchased callable debt securities held at a discount does not change.	January 1, 2019 Early adoption is permitted.	This Update is to be applied using a modified retrospective transition method. The adoption of this Update is not expected to have a material effect on our Consolidated Financial Statements.

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Standard	Description	Required Date of Adoption	Financial Statements Impact
Retirement Benefits
ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	This Update requires that an employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allows only the service cost component of net benefit cost to be eligible for capitalization.	January 1, 2018	We adopted this Update in the first quarter of 2018 by a retrospective transition method. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.
Statement of Cash Flows
ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force)	This Update adds or clarifies guidance on eight cash flow issues.	January 1, 2018	We adopted this Update in the first quarter of 2018 by retrospective application. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.
Credit Losses
ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This Update replaces the current incurred loss impairment methodology with a methodology that reflects current expected credit losses (commonly referred to as CECL) for most financial assets measured at amortized cost and certain other instruments, including loans, HTM debt securities, net investments in leases and off-balance sheet credit exposures. CECL requires loss estimates for the remaining life of the financial asset at the time the asset is originated or acquired, considering historical experience, current conditions and reasonable and supportable forecasts. In addition, the Update will require the use of a modified AFS debt security impairment model and eliminate the current accounting for purchased credit impaired loans and debt securities.	January 1, 2020 Early adoption is permitted for fiscal years beginning after December 15, 2018	This Update is to be applied using a cumulative-effect adjustment to retained earnings. The CECL model is a significant change from existing GAAP and may result in a material change to our accounting for financial instruments. We are reviewing our business processes, information systems and controls to support recognition and disclosures under this Update. This review includes an assessment of our existing credit models and the financial statement disclosure requirements. The impact of this Update will be dependent on the portfolio composition, credit quality and economic conditions at the time of adoption.
Extinguishments of Liabilities
ASU 2016-04, Liabilities - Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products (a consensus of the Emerging Issues Task Force)	This Update requires entities that sell prepaid stored-value products redeemable for goods, services or cash at third-party merchants to recognize breakage.	January 1, 2018	We adopted this Update in the first quarter of 2018. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.

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Standard	Description	Required Date of Adoption	Financial Statements Impact
Leases
ASU 2016-02, Leases (Topic 842)	This Updaterequires lessees to put most leases on their balance sheets but recognize expenses in the income statement similar to current accounting. In addition, the Update changes the guidance for sale-leaseback transactions, initial direct costs and lease executory costs for most entities. All entities will classify leases to determine how to recognize lease related revenue and expense.	January 1, 2019 Early adoption is permitted.	This Update is to be applied using a modified retrospective application including a number of optional practical expedients. We are in the process of reviewing our existing lease portfolios, implementing a software solution and assessing the potential impact to our Consolidated Financial Statements.
Financial Instruments – Recognition and Measurement
ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities	This Update amends the presentation and accounting for certain financial instruments, including liabilities measured at fair value under the FVO, and equity investments. The guidance also updates fair value presentation and disclosure requirements for financial instruments measured at amortized cost.	January 1, 2018	We adopted this Update in the first quarter of 2018 by a cumulative-effect adjustment. The adoption of this Update did not have a material effect on our Consolidated Financial Statements. During the first quarter of 2018, we transferred marketable equity securities totaling $1.1 million from securities AFS to other assets.
Revenue Recognition
ASU 2014-09, Revenue from Contracts with Customers (Topic 606)	This Update modifies the guidance used to recognize revenue from contracts with customers for transfers of goods and services and transfers of nonfinancial assets, unless those contracts are within the scope of other guidance. The guidance also requires new qualitative and quantitative disclosures about contract balances and performance obligations.	January 1, 2018	We adopted this Update in the first quarter of 2018 under the modified retrospective method. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.

NOTE 3.    MERGERS AND ACQUISITIONS

Yadkin Financial Corporation

On March 11, 2017, we completed our acquisition of YDKN, a bank holding company based in Raleigh, North Carolina. YDKN’s banking affiliate, Yadkin Bank, was merged into FNBPA on March 11, 2017. YDKN’s results of operations have been included in our Consolidated Statements of Income since that date. The acquisition enabled us to enter several North Carolina markets, including Raleigh, Charlotte and the Piedmont Triad, which is comprised of Winston-Salem, Greensboro and High Point. We also completed the core systems conversion activities during the first quarter of 2017.

On the acquisition date, the fair values of YDKN included $6.8 billion in assets, of which there was $5.1 billion in loans, and $5.2 billion in deposits. The acquisition was valued at $1.8 billion based on the acquisition date FNB common stock closing price of $15.97 and resulted in FNB issuing 111,619,622 shares of our common stock in exchange for 51,677,565 shares of YDKN common stock. Under the terms of the merger agreement, shareholders of YDKN received 2.16 shares of FNB common stock for each share of YDKN common stock and cash in lieu of fractional shares. YDKN’s fully vested and outstanding stock options were converted into options to purchase and receive FNB common stock. In conjunction with the acquisition, we assumed a warrant that was issued by YDKN to the UST under the Capital Purchase Program. Based on the exchange ratio, this

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warrant, which expires in 2019, was converted into a warrant to purchase up to 207,320 shares of FNB common stock with an exercise price of $9.63.

The acquisition of YDKN constituted a business combination and has been accounted for using the acquisition method of accounting, and accordingly, assets acquired, liabilities assumed and consideration exchanged were recorded at estimated fair value on the acquisition date. The determination of estimated fair values required management to make certain estimates about discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and may require adjustments, which can be updated for up to a year following the acquisition. As of March 31, 2018, all fair values and related adjustments to goodwill have been recorded.

NOTE 4.    SECURITIES

The amortized cost and fair value of securities are as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair  Value
Securities Available for Sale:
March 31, 2018
U.S. government-sponsored entities	$	364,600	$	—	$	(5,952	)	$	358,648
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,713,036		458		(41,921		)	1,671,573
Agency collateralized mortgage obligations	860,902		28		(28,580		)	832,350
Non-agency collateralized mortgage obligations	1		—		—			1
Commercial mortgage-backed securities	39,183		30		—			39,213
States of the U.S. and political subdivisions	21,138		3		(118		)	21,023
Other debt securities	4,916		—		(261		)	4,655
Total debt securities available for sale	$	3,003,776	$	519	$	(76,832	)	$	2,927,463
December 31, 2017
U.S. government-sponsored entities	$	347,767	$	52	$	(3,877	)	$	343,942
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,615,168		1,225		(17,519		)	1,598,874
Agency collateralized mortgage obligations	813,034		—		(18,077		)	794,957
Non-agency collateralized mortgage obligations	1		—		—			1
States of the U.S. and political subdivisions	21,151		6		(64		)	21,093
Other debt securities	4,913		—		(243		)	4,670
Total debt securities	2,802,034		1,283		(39,780		)	2,763,537
Equity securities	587		438		—			1,025
Total securities available for sale	$	2,802,621	$	1,721	$	(39,780	)	$	2,764,562

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(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair  Value
Debt Securities Held to Maturity:
March 31, 2018
U.S. Treasury	$	500	$	114	$	—		$	614
U.S. government-sponsored entities	247,272		81		(5,716		)	241,637
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,174,426		491		(27,472		)	1,147,445
Agency collateralized mortgage obligations	783,151		257		(29,971		)	753,437
Commercial mortgage-backed securities	79,476		32		(1,245		)	78,263
States of the U.S. and political subdivisions	939,175		2,483		(31,090		)	910,568
Total debt securities held to maturity	$	3,224,000	$	3,458	$	(95,494	)	$	3,131,964
December 31, 2017
U.S. Treasury	$	500	$	134	$	—		$	634
U.S. government-sponsored entities	247,310		93		(4,388		)	243,015
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,219,802		3,475		(9,058		)	1,214,219
Agency collateralized mortgage obligations	777,146		32		(20,095		)	757,083
Commercial mortgage-backed securities	80,786		414		(575		)	80,625
States of the U.S. and political subdivisions	916,724		13,209		(7,130		)	922,803
Total debt securities held to maturity	$	3,242,268	$	17,357	$	(41,246	)	$	3,218,379

Gross gains and gross losses were realized on securities as follows:

	Three Months Ended March 31,
(in thousands)	2018		2017
Gross gains	$	—	$	3,400
Gross losses	—		(775		)
Net gains	$	—	$	2,625

As of March 31, 2018, the amortized cost and fair value of debt securities, by contractual maturities, were as follows:

	Available for Sale				Held to Maturity
(in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	65,814	$	65,498	$	45,461	$	45,221
Due from one to five years	262,236		256,811		210,014		204,580
Due from five to ten years	7,876		7,725		94,022		93,225
Due after ten years	54,728		54,292		837,450		809,793
	390,654		384,326		1,186,947		1,152,819
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,713,036		1,671,573		1,174,426		1,147,445
Agency collateralized mortgage obligations	860,902		832,350		783,151		753,437
Non-agency collateralized mortgage obligations	1		1		—		—
Commercial mortgage-backed securities	39,183		39,213		79,476		78,263
Total debt securities	$	3,003,776	$	2,927,463	$	3,224,000	$	3,131,964

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Maturities may differ from contractual terms because borrowers may have the right to call or prepay obligations with or without penalties. Periodic payments are received on residential mortgage-backed securities based on the payment patterns of the underlying collateral.

Following is information relating to securities pledged:

(dollars in thousands)	March 31, 2018			December 31, 2017
Securities pledged (carrying value):
To secure public deposits, trust deposits and for other purposes as required by law	$	3,532,023		$	3,491,634
As collateral for short-term borrowings	298,233			263,756
Securities pledged as a percent of total securities	62.3		%	62.5		%

Following are summaries of the fair values and unrealized losses of temporarily impaired debt securities, segregated by length of impairment:

	Less than 12 Months						12 Months or More						Total
(dollars in thousands)	#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses
Debt Securities Available for Sale
March 31, 2018
U.S. government-sponsored entities	8	$	158,212	$	(1,389	)	10	$	200,436	$	(4,563	)	18	$	358,648	$	(5,952	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	59	1,212,767		(25,545		)	28	444,583		(16,376		)	87	1,657,350		(41,921		)
Agency collateralized mortgage obligations	16	470,878		(13,274		)	33	312,687		(15,306		)	49	783,565		(28,580		)
States of the U.S. and political subdivisions	7	11,434		(108		)	1	877		(10		)	8	12,311		(118		)
Other debt securities	—	—		—			3	4,655		(261		)	3	4,655		(261		)
Total temporarily impaired debt securities AFS	90	$	1,853,291	$	(40,316	)	75	$	963,238	$	(36,516	)	165	$	2,816,529	$	(76,832	)
December 31, 2017
U.S. government-sponsored entities	7	$	106,809	$	(363	)	10	$	201,485	$	(3,514	)	17	$	308,294	$	(3,877	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	43	976,738		(7,723		)	28	473,625		(9,796		)	71	1,450,363		(17,519		)
Agency collateralized mortgage obligations	14	409,005		(6,231		)	33	335,452		(11,846		)	47	744,457		(18,077		)
States of the U.S. and political subdivisions	7	11,254		(55		)	1	879		(9		)	8	12,133		(64		)
Other debt securities	—	—		—			3	4,670		(243		)	3	4,670		(243		)
Total temporarily impaired debt securities AFS	71	$	1,503,806	$	(14,372	)	75	$	1,016,111	$	(25,408	)	146	$	2,519,917	$	(39,780	)

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	Less than 12 Months						12 Months or More						Total
(dollars in thousands)	#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses
Debt Securities Held to Maturity
March 31, 2018
U.S. government-sponsored entities	4	$	54,558	$	(465	)	10	$	184,750	$	(5,251	)	14	$	239,308	$	(5,716	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	73	935,246		(20,410		)	11	173,759		(7,062		)	84	1,109,005		(27,472		)
Agency collateralized mortgage obligations	16	267,299		(5,862		)	35	444,572		(24,109		)	51	711,871		(29,971		)
Commercial mortgage-backed securities	6	48,737		(637		)	3	19,909		(608		)	9	68,646		(1,245		)
States of the U.S. and political subdivisions	148	517,101		(16,245		)	37	112,879		(14,845		)	185	629,980		(31,090		)
Total temporarily impaired debt securities HTM	247	$	1,822,941	$	(43,619	)	96	$	935,869	$	(51,875	)	343	$	2,758,810	$	(95,494	)
December 31, 2017
U.S. government-sponsored entities	4	$	54,790	$	(239	)	10	$	185,851	$	(4,149	)	14	$	240,641	$	(4,388	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	36	648,485		(4,855		)	11	183,989		(4,203		)	47	832,474		(9,058		)
Agency collateralized mortgage obligations	14	275,290		(1,701		)	35	473,257		(18,394		)	49	748,547		(20,095		)
Commercial mortgage-backed securities	3	26,399		(123		)	2	19,443		(452		)	5	45,842		(575		)
States of the U.S. and political subdivisions	16	56,739		(933		)	37	121,536		(6,197		)	53	178,275		(7,130		)
Total temporarily impaired debt securities HTM	73	$	1,061,703	$	(7,851	)	95	$	984,076	$	(33,395	)	168	$	2,045,779	$	(41,246	)

We do not intend to sell the debt securities and it is not more likely than not that we will be required to sell the securities before recovery of their amortized cost basis.

Other-Than-Temporary Impairment

We evaluate our investment securities portfolio for OTTI on a quarterly basis. Impairment is assessed at the individual security level. We consider an investment security impaired if the fair value of the security is less than its cost or amortized cost basis. We did not recognize any OTTI losses on securities for the three months ended March 31, 2018 or 2017.

States of the U.S. and Political Subdivisions

Our municipal bond portfolio with a carrying amount of $960.2 million as of March 31, 2018 is highly rated with an average entity-specific rating of AA and 100% of the portfolio rated A or better. All of the securities in the municipal portfolio except one are general obligation bonds. Geographically, municipal bonds support our primary footprint as 65% of the securities are from municipalities located throughout Pennsylvania, Ohio, Maryland, North Carolina and South Carolina. The average holding size of the securities in the municipal bond portfolio is $3.0 million. In addition to the strong stand-alone ratings, 62% of the municipalities have some formal credit enhancement insurance that strengthens the creditworthiness of their issue. Management reviews the credit profile of each issuer on a quarterly basis.

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NOTE 5.    LOANS AND LEASES

Following is a summary of loans and leases, net of unearned income:

(in thousands)	Originated Loans and Leases		Acquired Loans		Total Loans and Leases
March 31, 2018
Commercial real estate	$	5,465,150	$	3,346,325	$	8,811,475
Commercial and industrial	3,688,120		591,849		4,279,969
Commercial leases	279,582		—		279,582
Other	39,347		—		39,347
Total commercial loans and leases	9,472,199		3,938,174		13,410,373
Direct installment	1,737,242		134,397		1,871,639
Residential mortgages	2,131,338		630,763		2,762,101
Indirect installment	1,524,330		171		1,524,501
Consumer lines of credit	1,135,488		558,295		1,693,783
Total consumer loans	6,528,398		1,323,626		7,852,024
Total loans and leases, net of unearned income	$	16,000,597	$	5,261,800	$	21,262,397
December 31, 2017
Commercial real estate	$	5,174,783	$	3,567,081	$	8,741,864
Commercial and industrial	3,495,247		675,420		4,170,667
Commercial leases	266,720		—		266,720
Other	17,063		—		17,063
Total commercial loans and leases	8,953,813		4,242,501		13,196,314
Direct installment	1,755,713		149,822		1,905,535
Residential mortgages	2,036,226		666,465		2,702,691
Indirect installment	1,448,268		165		1,448,433
Consumer lines of credit	1,151,470		594,323		1,745,793
Total consumer loans	6,391,677		1,410,775		7,802,452
Total loans and leases, net of unearned income	$	15,345,490	$	5,653,276	$	20,998,766

The loans and leases portfolio categories are comprised of the following:

• Commercial real estate includes both owner-occupied and non-owner-occupied loans secured by commercial properties;

• Commercial and industrial includes loans to businesses that are not secured by real estate;

• Commercial leases consist of leases for new or used equipment;

• Other is comprised primarily of credit cards and mezzanine loans;

• Direct installment is comprised of fixed-rate, closed-end consumer loans for personal, family or household use, such as home equity loans and automobile loans;

• Residential mortgages consist of conventional and jumbo mortgage loans for 1-4 family properties;

• Indirect installment is comprised of loans originated by approved third parties and underwritten by us, primarily automobile loans; and

• Consumer lines of credit include home equity lines of credit and consumer lines of credit that are either unsecured or secured by collateral other than home equity.

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The loans and leases portfolio consists principally of loans to individuals and small- and medium-sized businesses within our primary market areas of Pennsylvania, eastern Ohio, Maryland, North Carolina, South Carolina and northern West Virginia.

The following table shows certain information relating to commercial real estate loans:

(dollars in thousands)	March 31, 2018			December 31, 2017
Commercial construction, acquisition and development loans	$	1,167,699		$	1,170,175
Percent of total loans and leases	5.5		%	5.6		%
Commercial real estate:
Percent owner-occupied	35.2		%	35.3		%
Percent non-owner-occupied	64.8		%	64.7		%

Acquired Loans

All acquired loans were initially recorded at fair value at the acquisition date. Refer to the Acquired Loans section in Note 1 of our 2017 Annual Report on Form 10-K for a discussion of ASC 310-20 and ASC 310-30 loans. The outstanding balance and the carrying amount of acquired loans included in the Consolidated Balance Sheets are as follows:

(in thousands)	March 31, 2018		December 31, 2017
Accounted for under ASC 310-30:
Outstanding balance	$	4,853,516	$	5,176,015
Carrying amount	4,521,926		4,834,256
Accounted for under ASC 310-20:
Outstanding balance	754,251		835,130
Carrying amount	733,037		812,322
Total acquired loans:
Outstanding balance	5,607,767		6,011,145
Carrying amount	5,254,963		5,646,578

The outstanding balance is the undiscounted sum of all amounts owed under the loan, including amounts deemed principal, interest, fees, penalties and other, whether or not currently due and whether or not any such amounts have been written or charged-off.

The carrying amount of purchased credit impaired loans included in the table above totaled $1.7 million at March 31, 2018 and $1.9 million at December 31, 2017, representing 0.03% of the carrying amount of total acquired loans as of each date.

The following table provides changes in accretable yield for all acquired loans accounted for under ASC 310-30. Loans accounted for under ASC 310-20 are not included in this table.

	Three Months Ended March 31,
(in thousands)	2018			2017
Balance at beginning of period	$	708,481		$	467,070
Acquisitions	—			443,261
Reduction due to unexpected early payoffs	(25,833		)	(20,560		)
Reclass from non-accretable difference	64,216			23,106
Disposals/transfers	(57		)	(36		)
Other	(403		)	—
Accretion	(59,079		)	(25,241		)
Balance at end of period	$	687,325		$	887,600

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Cash flows expected to be collected on acquired loans are estimated quarterly by incorporating several key assumptions similar to the initial estimate of fair value. These key assumptions include probability of default and the amount of actual prepayments after the acquisition date. Prepayments affect the estimated life of the loans and could change the amount of interest income, and possibly principal expected to be collected. In reforecasting future estimated cash flows, credit loss expectations are adjusted as necessary. Improved cash flow expectations for loans or pools are recorded first as a reversal of previously recorded impairment, if any, and then as an increase in prospective yield when all previously recorded impairment has been recaptured. Decreases in expected cash flows are recognized as impairment through a charge to the provision for credit losses and credit to the allowance for credit losses.

During the three months ended March 31, 2018, there was an overall improvement in cash flow expectations which resulted in a net reclassification of $64.2 million from the non-accretable difference to accretable yield. This reclassification was $23.1 million for the three months ended March 31, 2017. The reclassification from the non-accretable difference to the accretable yield results in prospective yield adjustments on the loan pools.

Credit Quality

Management monitors the credit quality of our loan portfolio using several performance measures to do so based on payment activity and borrower performance.

Non-performing loans include non-accrual loans and non-performing TDRs. Past due loans are reviewed on a monthly basis to identify loans for non-accrual status. We place originated loans on non-accrual status and discontinue interest accruals on originated loans generally when principal or interest is due and has remained unpaid for a certain number of days or when the full amount of principal and interest is due and has remained unpaid for a certain number of days, unless the loan is both well secured and in the process of collection. Commercial loans and leases are placed on non-accrual at 90 days, installment loans are placed on non-accrual at 120 days and residential mortgages and consumer lines of credit are generally placed on non-accrual at 180 days, though we may place a loan on non-accrual prior to these past due thresholds as warranted. When a loan is placed on non-accrual status, all unpaid accrued interest is reversed. Non-accrual loans may not be restored to accrual status until all delinquent principal and interest have been paid and the ultimate ability to collect the remaining principal and interest is reasonably assured. The majority of TDRs are loans in which we have granted a concession on the interest rate or the original repayment terms due to the borrower’s financial distress.

Following is a summary of non-performing assets:

(dollars in thousands)	March 31, 2018			December 31, 2017
Non-accrual loans	$	77,684		$	74,635
Troubled debt restructurings	24,452			23,481
Total non-performing loans	102,136			98,116
Other real estate owned	40,980			40,606
Total non-performing assets	$	143,116		$	138,722
Asset quality ratios:
Non-performing loans / total loans and leases	0.48		%	0.47		%
Non-performing loans + OREO / total loans and leases + OREO	0.67		%	0.66		%
Non-performing assets / total assets	0.45		%	0.44		%

The carrying value of residential other real estate owned held as a result of obtaining physical possession upon completion of a foreclosure or through completion of a deed in lieu of foreclosure amounted to $4.8 million at March 31, 2018 and $3.6 million at December 31, 2017. The recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process at March 31, 2018 and December 31, 2017 totaled $13.8 million and $15.2 million, respectively.

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The following tables provide an analysis of the aging of loans by class segregated by loans and leases originated and loans acquired:

(in thousands)	30-89 Days Past Due		>90 Days Past Due and Still Accruing		Non- Accrual		Total Past Due		Current		Total Loans and Leases
Originated Loans and Leases
March 31, 2018
Commercial real estate	$	8,345	$	1	$	27,349	$	35,695	$	5,429,455	$	5,465,150
Commercial and industrial	6,793		3		19,705		26,501		3,661,619		3,688,120
Commercial leases	692		—		1,399		2,091		277,491		279,582
Other	183		73		1,000		1,256		38,091		39,347
Total commercial loans and leases	16,013		77		49,453		65,543		9,406,656		9,472,199
Direct installment	8,129		3,913		8,411		20,453		1,716,789		1,737,242
Residential mortgages	14,870		1,982		5,254		22,106		2,109,232		2,131,338
Indirect installment	6,850		511		2,234		9,595		1,514,735		1,524,330
Consumer lines of credit	4,550		821		2,769		8,140		1,127,348		1,135,488
Total consumer loans	34,399		7,227		18,668		60,294		6,468,104		6,528,398
Total originated loans and leases	$	50,412	$	7,304	$	68,121	$	125,837	$	15,874,760	$	16,000,597
December 31, 2017
Commercial real estate	$	8,273	$	1	$	24,773	$	33,047	$	5,141,736	$	5,174,783
Commercial and industrial	8,948		3		17,077		26,028		3,469,219		3,495,247
Commercial leases	1,382		41		1,574		2,997		263,723		266,720
Other	83		153		1,000		1,236		15,827		17,063
Total commercial loans and leases	18,686		198		44,424		63,308		8,890,505		8,953,813
Direct installment	13,192		4,466		8,896		26,554		1,729,159		1,755,713
Residential mortgages	14,096		2,832		5,771		22,699		2,013,527		2,036,226
Indirect installment	10,313		611		2,240		13,164		1,435,104		1,448,268
Consumer lines of credit	5,859		1,014		2,313		9,186		1,142,284		1,151,470
Total consumer loans	43,460		8,923		19,220		71,603		6,320,074		6,391,677
Total originated loans and leases	$	62,146	$	9,121	$	63,644	$	134,911	$	15,210,579	$	15,345,490

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(in thousands)	30-89 Days Past Due		>90 Days Past Due and Still Accruing		Non- Accrual		Total Past Due (1) (2)		Current		(Discount) Premium			Total Loans
Acquired Loans
March 31, 2018
Commercial real estate	$	32,697	$	64,550	$	3,735	$	100,982	$	3,433,231	$	(187,888	)	$	3,346,325
Commercial and industrial	5,135		4,617		4,652		14,404		612,354		(34,909		)	591,849
Total commercial loans	37,832		69,167		8,387		115,386		4,045,585		(222,797		)	3,938,174
Direct installment	2,826		1,746		—		4,572		128,754		1,071			134,397
Residential mortgages	15,113		13,059		—		28,172		642,966		(40,375		)	630,763
Indirect installment	—		1		—		1		7		163			171
Consumer lines of credit	5,357		2,139		1,176		8,672		561,906		(12,283		)	558,295
Total consumer loans	23,296		16,945		1,176		41,417		1,333,633		(51,424		)	1,323,626
Total acquired loans	$	61,128	$	86,112	$	9,563	$	156,803	$	5,379,218	$	(274,221	)	$	5,261,800
December 31, 2017
Commercial real estate	$	34,928	$	63,092	$	3,975	$	101,995	$	3,657,152	$	(192,066	)	$	3,567,081
Commercial and industrial	3,187		6,452		5,663		15,302		698,265		(38,147		)	675,420
Total commercial loans	38,115		69,544		9,638		117,297		4,355,417		(230,213		)	4,242,501
Direct installment	5,267		2,013		—		7,280		141,386		1,156			149,822
Residential mortgages	17,191		15,139		—		32,330		675,499		(41,364		)	666,465
Indirect installment	—		1		—		1		10		154			165
Consumer lines of credit	6,353		3,253		1,353		10,959		596,298		(12,934		)	594,323
Total consumer loans	28,811		20,406		1,353		50,570		1,413,193		(52,988		)	1,410,775
Total acquired loans	$	66,926	$	89,950	$	10,991	$	167,867	$	5,768,610	$	(283,201	)	$	5,653,276

(1) Past due information for acquired loans is based on the contractual balance outstanding at March 31, 2018 and December 31, 2017.

(2) Acquired loans are considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if we can reasonably estimate the timing and amount of expected cash flows on such loans. In these instances, we do not consider acquired contractually delinquent loans to be non-accrual or non-performing and continue to recognize interest income on these loans using the accretion method. Acquired loans are considered non-accrual or non-performing when, due to credit deterioration or other factors, we determine we are no longer able to reasonably estimate the timing and amount of expected cash flows on such loans. We do not recognize interest income on acquired loans considered non-accrual or non-performing.

We utilize the following categories to monitor credit quality within our commercial loan and lease portfolio:

Rating Category	Definition
Pass	in general, the condition of the borrower and the performance of the loan is satisfactory or better
Special Mention	in general, the condition of the borrower has deteriorated, requiring an increased level of monitoring
Substandard	in general, the condition of the borrower has significantly deteriorated and the performance of the loan could further deteriorate if deficiencies are not corrected
Doubtful	in general, the condition of the borrower has significantly deteriorated and the collection in full of both principal and interest is highly questionable or improbable

The use of these internally assigned credit quality categories within the commercial loan and lease portfolio permits management’s use of transition matrices to estimate a quantitative portion of credit risk. Our internal credit risk grading system

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is based on past experiences with similarly graded loans and leases and conforms with regulatory categories. In general, loan and lease risk ratings within each category are reviewed on an ongoing basis according to our policy for each class of loans and leases. Each quarter, management analyzes the resulting ratings, as well as other external statistics and factors such as delinquency, to track the migration performance of the commercial loan and lease portfolio. Loans and leases within the Pass credit category or that migrate toward the Pass credit category generally have a lower risk of loss compared to loans and leases that migrate toward the Substandard or Doubtful credit categories. Accordingly, management applies higher risk factors to Substandard and Doubtful credit categories.

The following tables present a summary of our commercial loans and leases by credit quality category, segregated by loans and leases originated and loans acquired:

	Commercial Loan and Lease Credit Quality Categories
(in thousands)	Pass		Special Mention		Substandard		Doubtful		Total
Originated Loans and Leases
March 31, 2018
Commercial real estate	$	5,195,183	$	148,120	$	121,542	$	305	$	5,465,150
Commercial and industrial	3,412,745		191,627		80,803		2,945		3,688,120
Commercial leases	269,837		3,518		6,227		—		279,582
Other	38,231		43		1,073		—		39,347
Total originated commercial loans and leases	$	8,915,996	$	343,308	$	209,645	$	3,250	$	9,472,199
December 31, 2017
Commercial real estate	$	4,922,872	$	152,744	$	98,728	$	439	$	5,174,783
Commercial and industrial	3,266,966		132,975		92,091		3,215		3,495,247
Commercial leases	260,235		4,425		2,060		—		266,720
Other	15,866		43		1,154		—		17,063
Total originated commercial loans and leases	$	8,465,939	$	290,187	$	194,033	$	3,654	$	8,953,813
Acquired Loans
March 31, 2018
Commercial real estate	$	2,877,345	$	225,364	$	243,402	$	214	$	3,346,325
Commercial and industrial	520,361		28,166		43,314		8		591,849
Total acquired commercial loans	$	3,397,706	$	253,530	$	286,716	$	222	$	3,938,174
December 31, 2017
Commercial real estate	$	3,102,788	$	250,987	$	213,089	$	217	$	3,567,081
Commercial and industrial	603,611		26,059		45,661		89		675,420
Total acquired commercial loans	$	3,706,399	$	277,046	$	258,750	$	306	$	4,242,501

Credit quality information for acquired loans is based on the contractual balance outstanding at March 31, 2018 and December 31, 2017.

We use delinquency transition matrices within the consumer and other loan classes to enable management to estimate a quantitative portion of credit risk. Each month, management analyzes payment and volume activity, Fair Isaac Corporation (FICO) scores and other external factors such as unemployment, to determine how consumer loans are performing.

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Following is a table showing consumer loans by payment status:

	Consumer Loan Credit Quality by Payment Status
(in thousands)	Performing		Non- Performing		Total
Originated loans
March 31, 2018
Direct installment	$	1,721,589	$	15,653	$	1,737,242
Residential mortgages	2,115,204		16,134		2,131,338
Indirect installment	1,521,906		2,424		1,524,330
Consumer lines of credit	1,130,978		4,510		1,135,488
Total originated consumer loans	$	6,489,677	$	38,721	$	6,528,398
December 31, 2017
Direct installment	$	1,739,060	$	16,653	$	1,755,713
Residential mortgages	2,019,816		16,410		2,036,226
Indirect installment	1,445,833		2,435		1,448,268
Consumer lines of credit	1,147,576		3,894		1,151,470
Total originated consumer loans	$	6,352,285	$	39,392	$	6,391,677
Acquired loans
March 31, 2018
Direct installment	$	134,327	$	70	$	134,397
Residential mortgages	630,763		—		630,763
Indirect installment	171		—		171
Consumer lines of credit	556,633		1,662		558,295
Total acquired consumer loans	$	1,321,894	$	1,732	$	1,323,626
December 31, 2017
Direct installment	$	149,751	$	71	$	149,822
Residential mortgages	666,465		—		666,465
Indirect installment	165		—		165
Consumer lines of credit	592,384		1,939		594,323
Total acquired consumer loans	$	1,408,765	$	2,010	$	1,410,775

Loans and leases are designated as impaired when, in the opinion of management, based on current information and events, the collection of principal and interest in accordance with the loan and lease contract is doubtful. Typically, we do not consider loans and leases for impairment unless a sustained period of delinquency (i.e., 90-plus days) is noted or there are subsequent events that impact repayment probability (i.e., negative financial trends, bankruptcy filings, imminent foreclosure proceedings, etc.). Impairment is evaluated in the aggregate for consumer installment loans, residential mortgages, consumer lines of credit and commercial loan and lease relationships less than $0.5 million based on loan and lease segment loss given default. For commercial loan and lease relationships greater than or equal to $0.5 million, a specific valuation allowance is allocated, if necessary, so that the loan is reported net, at the present value of estimated future cash flows using a market interest rate or at the fair value of collateral if repayment is expected solely from the collateral. Consistent with our existing method of income recognition for loans and leases, interest income on impaired loans, except those classified as non-accrual, is recognized using the accrual method. Impaired loans, or portions thereof, are charged off when deemed uncollectible.

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Following is a summary of information pertaining to originated loans and leases considered to be impaired, by class of loan and lease:

(in thousands)	Unpaid Contractual Principal Balance		Recorded Investment With No Specific Reserve		Recorded Investment With Specific Reserve		Total Recorded Investment		Specific Reserve		Average Recorded Investment
At or for the Three Months Ended March 31, 2018
Commercial real estate	$	30,584	$	25,478	$	1,751	$	27,229	$	305	$	25,988
Commercial and industrial	26,034		15,859		5,007		20,866		2,945		20,479
Commercial leases	1,399		1,399		—		1,399		—		1,486
Other	—		—		—		—		—		—
Total commercial loans and leases	58,017		42,736		6,758		49,494		3,250		47,953
Direct installment	18,623		15,653		—		15,653		—		16,153
Residential mortgages	17,448		16,134		—		16,134		—		16,272
Indirect installment	4,648		2,424		—		2,424		—		2,429
Consumer lines of credit	5,698		4,510		—		4,510		—		4,202
Total consumer loans	46,417		38,721		—		38,721		—		39,056
Total	$	104,434	$	81,457	$	6,758	$	88,215	$	3,250	$	87,009
At or for the Year Ended December 31, 2017
Commercial real estate	$	27,718	$	21,748	$	2,906	$	24,654	$	439	$	24,413
Commercial and industrial	29,307		11,595		4,457		16,052		3,215		23,907
Commercial leases	1,574		1,574		—		1,574		—		1,386
Other	—		—		—		—		—		—
Total commercial loans and leases	58,599		34,917		7,363		42,280		3,654		49,706
Direct installment	19,375		16,653		—		16,653		—		16,852
Residential mortgages	17,754		16,410		—		16,410		—		15,984
Indirect installment	5,709		2,435		—		2,435		—		2,279
Consumer lines of credit	5,039		3,894		—		3,894		—		3,815
Total consumer loans	47,877		39,392		—		39,392		—		38,930
Total	$	106,476	$	74,309	$	7,363	$	81,672	$	3,654	$	88,636

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Interest income continued to accrue on certain impaired loans and totaled approximately $1.6 million and $1.9 million for the three months ended March 31, 2018 and 2017, respectively. The above tables do not reflect the additional allowance for credit losses relating to acquired loans. Following is a summary of the allowance for credit losses required for acquired loans due to changes in credit quality subsequent to the acquisition date:

(in thousands)	March 31, 2018			December 31, 2017
Commercial real estate	$	2,732		$	4,976
Commercial and industrial	1,785			(415		)
Total commercial loans	4,517			4,561
Direct installment	1,804			1,553
Residential mortgages	518			484
Indirect installment	240			177
Consumer lines of credit	(242		)	(77		)
Total consumer loans	2,320			2,137
Total allowance on acquired loans	$	6,837		$	6,698

Troubled Debt Restructurings

TDRs are loans whose contractual terms have been modified in a manner that grants a concession to a borrower experiencing financial difficulties. TDRs typically result from loss mitigation activities and could include the extension of a maturity date, interest rate reduction, principal forgiveness, deferral or decrease in payments for a period of time and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of collateral.

Following is a summary of the composition of total TDRs:

(in thousands)	Originated		Acquired		Total
March 31, 2018
Accruing:
Performing	$	19,525	$	249	$	19,774
Non-performing	21,283		3,169		24,452
Non-accrual	10,668		357		11,025
Total TDRs	$	51,476	$	3,775	$	55,251
December 31, 2017
Accruing:
Performing	$	19,538	$	266	$	19,804
Non-performing	20,173		3,308		23,481
Non-accrual	10,472		234		10,706
Total TDRs	$	50,183	$	3,808	$	53,991

TDRs that are accruing and performing include loans that met the criteria for non-accrual of interest prior to restructuring for which we can reasonably estimate the timing and amount of the expected cash flows on such loans and for which we expect to fully collect the new carrying value of the loans. During the three months ended March 31, 2018, we returned to performing status $1.2 million in restructured residential mortgage loans that have consistently met their modified obligations for more than six months. TDRs that are accruing and non-performing are comprised of consumer loans that have not demonstrated a consistent repayment pattern on the modified terms for more than six months, however it is expected that we will collect all future principal and interest payments. TDRs that are on non-accrual are not placed on accruing status until all delinquent principal and interest have been paid and the ultimate collectability of the remaining principal and interest is reasonably assured. Some loan modifications classified as TDRs may not ultimately result in the full collection of principal and interest, as modified, and may result in potential incremental losses which are factored into the allowance for credit losses.

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Excluding purchased impaired loans, commercial loans over $0.5 million whose terms have been modified in a TDR are generally placed on non-accrual, individually analyzed and measured for estimated impairment based on the fair value of the underlying collateral. Our allowance for credit losses included specific reserves for commercial TDRs and pooled reserves for individually impaired loans under $0.5 million based on loan segment loss given default. Upon default, the amount of the recorded investment in the TDR in excess of the fair value of the collateral, less estimated selling costs, is generally considered a confirmed loss and is charged-off against the allowance for credit losses. The reserve for commercial TDRs included in the allowance for credit losses is presented in the following table:

(in thousands)	March 31, 2018		December 31, 2017
Specific reserves for commercial TDRs	$	726	$	95
Pooled reserves for individual commercial loans	519		469

All other classes of loans, which are primarily secured by residential properties, whose terms have been modified in a TDR are pooled and measured for estimated impairment based on the expected net present value of the estimated future cash flows of the pool. Our allowance for credit losses included pooled reserves for these classes of loans of $4.0 million for both March 31, 2018 and December 31, 2017. Upon default of an individual loan, our charge-off policy is followed accordingly for that class of loan.

Following is a summary of TDR loans, by class:

	Three Months Ended March 31, 2018
(dollars in thousands)	Number of Contracts	Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment
Commercial real estate	1	$	328	$	328
Commercial and industrial	1	1,687		1,230
Total commercial loans	2	2,015		1,558
Direct installment	182	1,135		1,056
Residential mortgages	11	501		504
Indirect installment	9	13		12
Consumer lines of credit	21	352		287
Total consumer loans	223	2,001		1,859
Total	225	$	4,016	$	3,417

	Three Months Ended March 31, 2017
(dollars in thousands)	Number of Contracts	Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment
Commercial real estate	1	$	114	$	109
Commercial and industrial	—	—		—
Total commercial loans	1	114		109
Direct installment	171	1,488		1,412
Residential mortgages	8	163		176
Indirect installment	5	17		14
Consumer lines of credit	22	742		729
Total consumer loans	206	2,410		2,331
Total	207	$	2,524	$	2,440

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Following is a summary of originated TDRs, by class, for which there was a payment default, excluding loans that were either charged-off or cured by period end. Default occurs when a loan is 90 days or more past due and is within 12 months of restructuring.

	Three Months Ended March 31, 2018
(dollars in thousands)	Number of Contracts	Recorded Investment
Direct installment	45	$	130
Residential mortgages	4	190
Indirect installment	5	10
Consumer lines of credit	1	196
Total consumer loans	55	526
Total	55	$	526

	Three Months Ended March 31, 2017
(dollars in thousands)	Number of Contracts	Recorded Investment
Direct installment	29	$	82
Residential mortgages	2	224
Indirect installment	6	10
Consumer lines of credit	1	34
Total consumer loans	38	350
Total	38	$	350

NOTE 6.    ALLOWANCE FOR CREDIT LOSSES

The allowance for credit losses addresses credit losses inherent in the existing loan and lease portfolio and is presented as a reserve against loans and leases on the Consolidated Balance Sheets. Loan and lease losses are charged off against the allowance for credit losses, with recoveries of amounts previously charged off credited to the allowance for credit losses. Provisions for credit losses are charged to operations based on management’s periodic evaluation of the adequacy of the allowance for credit losses.

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Following is a summary of changes in the allowance for credit losses, by loan and lease class:

(in thousands)	Balance at Beginning of Period		Charge- Offs			Recoveries		Net Charge- Offs			Provision for Credit Losses			Balance at End of Period
Three Months Ended March 31, 2018
Commercial real estate	$	50,281	$	(225	)	$	337	$	112		$	3,123		$	53,516
Commercial and industrial	51,963		(5,920		)	369		(5,551		)	6,601			53,013
Commercial leases	5,646		(171		)	10		(161		)	630			6,115
Other	1,843		(797		)	297		(500		)	652			1,995
Total commercial loans and leases	109,733		(7,113		)	1,013		(6,100		)	11,006			114,639
Direct installment	20,936		(3,470		)	440		(3,030		)	2,222			20,128
Residential mortgages	15,507		(79		)	91		12			(239		)	15,280
Indirect installment	11,967		(2,409		)	895		(1,514		)	1,502			11,955
Consumer lines of credit	10,539		(531		)	121		(410		)	279			10,408
Total consumer loans	58,949		(6,489		)	1,547		(4,942		)	3,764			57,771
Total allowance on originated loans and leases	168,682		(13,602		)	2,560		(11,042		)	14,770			172,410
Purchased credit-impaired loans	635		—			—		—			(13		)	622
Other acquired loans	6,063		(309		)	723		414			(262		)	6,215
Total allowance on acquired loans	6,698		(309		)	723		414			(275		)	6,837
Total allowance for credit losses	$	175,380	$	(13,911	)	$	3,283	$	(10,628	)	$	14,495		$	179,247

(in thousands)	Balance at Beginning of Period		Charge- Offs			Recoveries		Net Charge- Offs			Provision for Credit Losses			Balance at End of Period
Three Months Ended March 31, 2017
Commercial real estate	$	46,635	$	(988	)	$	361	$	(627	)	$	381		$	46,389
Commercial and industrial	47,991		(2,463		)	474		(1,989		)	7,568			53,570
Commercial leases	3,280		(506		)	1		(505		)	738			3,513
Other	1,392		(973		)	327		(646		)	1,063			1,809
Total commercial loans and leases	99,298		(4,930		)	1,163		(3,767		)	9,750			105,281
Direct installment	21,391		(2,874		)	628		(2,246		)	1,065			20,210
Residential mortgages	10,082		(180		)	161		(19		)	147			10,210
Indirect installment	10,564		(2,370		)	781		(1,589		)	655			9,630
Consumer lines of credit	9,456		(458		)	165		(293		)	(280		)	8,883
Total consumer loans	51,493		(5,882		)	1,735		(4,147		)	1,587			48,933
Total allowance on originated loans and leases	150,791		(10,812		)	2,898		(7,914		)	11,337			154,214
Purchased credit-impaired loans	572		—			—		—			88			660
Other acquired loans	6,696		(482		)	269		(213		)	(575		)	5,908
Total allowance on acquired loans	7,268		(482		)	269		(213		)	(487		)	6,568
Total allowance for credit losses	$	158,059	$	(11,294	)	$	3,167	$	(8,127	)	$	10,850		$	160,782

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Following is a summary of the individual and collective originated allowance for credit losses and corresponding originated loan and lease balances by class:

	Originated Allowance				Originated Loans and Leases Outstanding
(in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Loans and Leases		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
March 31, 2018
Commercial real estate	$	305	$	53,211	$	5,465,150	$	12,292	$	5,452,858
Commercial and industrial	2,945		50,068		3,688,120		10,880		3,677,240
Commercial leases	—		6,115		279,582		—		279,582
Other	—		1,995		39,347		—		39,347
Total commercial loans and leases	3,250		111,389		9,472,199		23,172		9,449,027
Direct installment	—		20,128		1,737,242		—		1,737,242
Residential mortgages	—		15,280		2,131,338		—		2,131,338
Indirect installment	—		11,955		1,524,330		—		1,524,330
Consumer lines of credit	—		10,408		1,135,488		—		1,135,488
Total consumer loans	—		57,771		6,528,398		—		6,528,398
Total	$	3,250	$	169,160	$	16,000,597	$	23,172	$	15,977,425
December 31, 2017
Commercial real estate	$	439	$	49,842	$	5,174,783	$	11,114	$	5,163,669
Commercial and industrial	3,215		48,748		3,495,247		9,872		3,485,375
Commercial leases	—		5,646		266,720		—		266,720
Other	—		1,843		17,063		—		17,063
Total commercial loans and leases	3,654		106,079		8,953,813		20,986		8,932,827
Direct installment	—		20,936		1,755,713		—		1,755,713
Residential mortgages	—		15,507		2,036,226		—		2,036,226
Indirect installment	—		11,967		1,448,268		—		1,448,268
Consumer lines of credit	—		10,539		1,151,470		—		1,151,470
Total consumer loans	—		58,949		6,391,677		—		6,391,677
Total	$	3,654	$	165,028	$	15,345,490	$	20,986	$	15,324,504

The above table excludes acquired loans that were pooled into groups of loans for evaluating impairment.

NOTE 7.    LOAN SERVICING

Mortgage Loan Servicing

We retain the servicing rights on certain mortgage loans sold. The unpaid principal balance of mortgage loans serviced for others, as of March 31, 2018 and December 31, 2017, is listed below:

(in thousands)	March 31, 2018		December 31, 2017
Mortgage loans sold with servicing retained	$	3,417,642	$	3,256,548

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The following table summarizes activity relating to mortgage loans sold with servicing retained:

	Three Months Ended March 31,
(in thousands)	2018		2017
Mortgage loans sold with servicing retained	$	236,893	$	129,843
Pretax gains resulting from above loan sales (1)	3,798		3,638
Mortgage servicing fees (1)	2,174		1,603

(1) Recorded in mortgage banking operations.

Following is a summary of the MSR activity:

	Three Months Ended March 31,
(in thousands)	2018			2017
Balance at beginning of period	$	29,053		$	13,521
Fair value of MSRs acquired	—			8,553
Additions	2,710			1,454
Payoffs and curtailments	(405		)	(139		)
Amortization	(567		)	(523		)
Balance at end of period	$	30,791		$	22,866
Fair value, beginning of period	$	32,419		$	17,546
Fair value, end of period	36,445			26,962

We did not have a valuation allowance for MSRs for any of the periods presented in the table above.

The fair value of MSRs is highly sensitive to changes in assumptions and is determined by estimating the present value of the asset’s future cash flows utilizing market-based prepayment rates, discount rates and other assumptions validated through comparison to trade information, industry surveys and with the use of independent third party appraisals. Changes in prepayment speed assumptions have the most significant impact on the fair value of MSRs. Generally, as interest rates decline, mortgage loan prepayments accelerate due to increased refinance activity, which results in a decrease in the fair value of the MSR and as interest rates increase, mortgage loan prepayments decline, which results in an increase in the fair value of the MSR. Measurement of fair value is limited to the conditions existing and the assumptions utilized as of a particular point in time, and those assumptions may not be appropriate if they are applied at a different time.

Following is a summary of the sensitivity of the fair value of MSRs to changes in key assumptions:

(dollars in thousands)	March 31, 2018			December 31, 2017
Weighted average life (months)	84.5			80.4
Constant prepayment rate (annualized)	9.1		%	9.9		%
Discount rate	9.9		%	9.9		%
Effect on fair value due to change in interest rates:
+0.25%	$	1,179		$	1,737
+0.50%	2,131			3,220
-0.25%	(1,476		)	(1,937		)
-0.50%	(3,237		)	(4,007		)

The sensitivity calculations above are hypothetical and should not be considered to be predictive of future performance. Changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the changes in assumptions to fair value may not be linear. Also, in this table, the effects of an adverse variation in a particular assumption on the fair value of the MSRs is calculated without changing any other assumptions, while in reality, changes in one factor may result in changing another, which may magnify or contract the effect of the change.

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SBA-Guaranteed Loan Servicing

Beginning in March 2017, as a result of the YDKN acquisition, we retain the servicing rights on SBA-guaranteed loans sold to investors. The standard sale structure under the SBA Secondary Participation Guaranty Agreement provides for us to retain a portion of the cash flow from the interest payment received on the loan, which is commonly known as a servicing spread. The unpaid principal balance of SBA-guaranteed loans serviced for investors, as of March 31, 2018 and December 31, 2017, was as follows:

(in thousands)	March 31, 2018		December 31, 2017
SBA loans sold to investors with servicing retained	$	300,857	$	305,977

The following table summarizes activity relating to SBA loans sold with servicing retained:

	Three Months Ended March 31,
(in thousands)	2018		2017
SBA loans sold with servicing retained	$	12,288	$	—
Pretax gains resulting from above loan sales (1)	1,101		—
SBA servicing fees (1)	750		115

(1) Recorded in non-interest income.

Following is a summary of the activity in SBA servicing rights:

	Three Months Ended March 31,
(in thousands)	2017			2017
Balance at beginning of period	$	5,058		$	—
Fair value of servicing rights acquired	—			5,399
Additions	388			—
Impairment (charge) / recovery	(90		)	—
Amortization	(294		)	(60		)
Balance at end of period	$	5,062		$	5,339
Fair value, beginning of period	$	5,058		$	—
Fair value, end of period	5,062			5,339

Following is a summary of key assumptions and the sensitivity of the SBA loan servicing rights to changes in these assumptions:

	March 31, 2018														December 31, 2017
			Decline in fair value due to														Decline in fair value due to
(dollars in thousands)	Actual		10% adverse change			20% adverse change			1% adverse change			2% adverse change			Actual		10% adverse change			20% adverse change			1% adverse change			2% adverse change
Weighted-average life (months)	61.0														63.5
Constant prepayment rate (annualized)	10.01	%	$	(158	)	$	(309	)	$	—		$	—		9.29	%	$	(145	)	$	(284	)	$	—		$	—
Discount rate	14.76		—			—			(148		)	(287		)	14.87		—			—			(147		)	(286		)

The fair value of the SBA servicing rights is compared to the amortized basis. If the amortized basis exceeds the fair value, the asset is considered impaired and is written down to fair value through a valuation allowance on the asset and a charge against SBA income. We had a $0.4 million valuation allowance for SBA servicing rights as of March 31, 2018.

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NOTE 8.    BORROWINGS

Following is a summary of short-term borrowings:

(in thousands)	March 31, 2018		December 31, 2017
Securities sold under repurchase agreements	$	280,492	$	256,017
Federal Home Loan Bank advances	1,555,000		2,285,000
Federal funds purchased	1,830,000		1,000,000
Subordinated notes	136,988		137,320
Total short-term borrowings	$	3,802,480	$	3,678,337

Borrowings with original maturities of one year or less are classified as short-term. Securities sold under repurchase agreements are comprised of customer repurchase agreements, which are sweep accounts with next day maturities utilized by larger commercial customers to earn interest on their funds. Securities are pledged to these customers in an amount equal to the outstanding balance.

Following is a summary of long-term borrowings:

(in thousands)	March 31, 2018		December 31, 2017
Federal Home Loan Bank advances	$	300,053	$	310,061
Subordinated notes	89,523		87,614
Junior subordinated debt	110,466		110,347
Other subordinated debt	159,848		160,151
Total long-term borrowings	$	659,890	$	668,173

Our banking affiliate has available credit with the FHLB of $7.8 billion, of which $1.9 billion was utilized as of March 31, 2018. These advances are secured by loans collateralized by residential mortgages, home equity lines of credit, commercial real estate and FHLB stock and are scheduled to mature in various amounts periodically through the year 2021. Effective interest rates paid on the long-term advances ranged from 1.39% to 4.19% for the three months ended March 31, 2018 and 0.95% to 4.19% for the year ended December 31, 2017.

The junior subordinated debt is comprised of the debt securities issued by FNB in relation to our unconsolidated subsidiary trusts (collectively, the Trusts), which are unconsolidated variable interest entities, and is included on the balance sheet in long-term borrowings. Since third-party investors are the primary beneficiaries, the Trusts are not consolidated in our financial statements. We record the distributions on the junior subordinated debt issued to the Trusts as interest expense.

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The following table provides information relating to the Trusts as of March 31, 2018:

(dollars in thousands)	Trust Preferred Securities		Common Securities		Junior Subordinated Debt		Stated Maturity Date	Interest Rate		Rate Reset Factor
F.N.B. Statutory Trust II	$	21,500	$	665	$	22,165	6/15/2036	3.77	%	LIBOR + 165 basis points (bps)
Omega Financial Capital Trust I	26,000		1,114		26,483		10/18/2034	3.92	%	LIBOR + 219 bps
Yadkin Valley Statutory Trust I	25,000		774		20,925		12/15/2037	3.44	%	LIBOR + 132 bps
FNB Financial Services Capital Trust I	25,000		774		21,859		9/30/2035	3.79	%	LIBOR + 146 bps
American Community Capital Trust II	10,000		310		10,446		12/15/2033	5.11	%	LIBOR + 280 bps
Crescent Financial Capital Trust I	8,000		248		8,588		10/7/2033	4.82	%	LIBOR + 310 bps
Total	$	115,500	$	3,885	$	110,466

NOTE 9.    DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

We are exposed to certain risks arising from both our business operations and economic conditions. We principally manage our exposures to a wide variety of business and operational risks through management of our core business activities. We manage economic risks, including interest rate risk, primarily by managing the amount, source, and duration of our assets and liabilities, and through the use of derivative instruments. Derivative instruments are used to reduce the effects that changes in interest rates may have on net income and cash flows. We also use derivative instruments to facilitate transactions on behalf of our customers.

All derivatives are carried on the Consolidated Balance Sheets at fair value and do not take into account the effects of master netting arrangements we have with other financial institutions. Credit risk is included in the determination of the estimated fair value of derivatives. Derivative assets are reported in the Consolidated Balance Sheets in other assets and derivative liabilities are reported in the Consolidated Balance Sheets in other liabilities. Changes in fair value are recognized in earnings except for certain changes related to derivative instruments designated as part of a cash flow hedging relationship.

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The following table presents notional amounts and gross fair values of our derivative assets and derivative liabilities which are not offset in the balance sheet.

	March 31, 2018						December 31, 2017
	Notional		Fair Value				Notional		Fair Value
(in thousands)	Amount		Asset		Liability		Amount		Asset		Liability
Gross Derivatives
Subject to master netting arrangements:
Interest rate contracts – designated	$	705,000	$	—	$	3,662	$	705,000	$	228	$	1,982
Interest rate swaps – not designated	2,422,236		3,481		9,117		2,245,442		1,169		11,599
Equity contracts – not designated	1,180		26		—		1,180		51		—
Total subject to master netting arrangements	3,128,416		3,507		12,779		2,951,622		1,448		13,581
Not subject to master netting arrangements:
Interest rate swaps – not designated	2,422,236		15,176		38,787		2,245,442		27,233		15,303
Interest rate lock commitments – not designated	78,368		1,380		5		88,107		1,594		5
Forward delivery commitments – not designated	94,996		209		231		106,572		233		148
Credit risk contracts – not designated	206,747		20		64		235,196		39		109
Equity contracts – not designated	1,180		—		26		1,180		—		51
Total not subject to master netting arrangements	2,803,527		16,785		39,113		2,676,497		29,099		15,616
Total	$	5,931,943	$	20,292	$	51,892	$	5,628,119	$	30,547	$	29,197

Beginning in the first quarter of 2017, certain derivative exchanges have enacted a rule change which in effect results in the legal characterization of variation margin payments for certain derivative contracts as settlement of the derivatives mark-to-market exposure and not collateral. This rule change became effective for us in the first quarter of 2017. Accordingly, we have changed our reporting of certain derivatives to record variation margin on trades cleared through exchanges that have adopted the rule change as settled where we had previously recorded cash collateral. The daily settlement of the derivative exposure does not change or reset the contractual terms of the instrument.

Derivatives Designated as Hedging Instruments under GAAP

Interest Rate Contracts. We entered into interest rate derivative agreements to modify the interest rate characteristics of certain commercial loans and five of our FHLB advances from variable rate to fixed rate in order to reduce the impact of changes in future cash flows due to market interest rate changes. These agreements are designated as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows). The effective portion of the derivative’s gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings in the same line item associated with the forecasted transaction when the forecasted transaction affects earnings. Any ineffective portion of the gain or loss is reported in earnings immediately.

Following is a summary of key data related to interest rate contracts:

(in thousands)	March 31, 2018		December 31, 2017
Notional amount	$	705,000	$	705,000
Fair value included in other assets	—		228
Fair value included in other liabilities	3,662		1,982

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The following table shows amounts reclassified from accumulated other comprehensive income for the three months ended March 31, 2018:

(in thousands)	Total			Net of Tax
Reclassified from AOCI to interest income	$	93		$	73
Reclassified from AOCI to interest expense	(129		)	(102		)

As of March 31, 2018, the maximum length of time over which forecasted interest cash flows are hedged is 5 years. In the twelve months that follow March 31, 2018, we expect to reclassify from the amount currently reported in AOCI net derivative gains of $3.2 million ($2.5 million net of tax), in association with interest on the hedged loans and FHLB advances. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, and the addition of other hedges subsequent to March 31, 2018.

There were no components of derivative gains or losses excluded from the assessment of hedge effectiveness related to these cash flow hedges. For the three months ended March 31, 2018 and 2017, there was no hedge ineffectiveness. Also, during the three months ended March 31, 2018 and 2017, there were no gains or losses from cash flow hedge derivatives reclassified to earnings because it became probable that the original forecasted transactions would not occur.

Derivatives Not Designated as Hedging Instruments under GAAP

Interest Rate Swaps. We enter into interest rate swap agreements to meet the financing, interest rate and equity risk management needs of qualifying commercial loan customers. These agreements provide the customer the ability to convert from variable to fixed interest rates. The credit risk associated with derivatives executed with customers is essentially the same as that involved in extending loans and is subject to normal credit policies and monitoring. Swap derivative transactions with customers are not subject to enforceable master netting arrangements and are generally secured by rights to non-financial collateral, such as real and personal property.

We enter into positions with a derivative counterparty in order to offset our exposure on the fixed components of the customer interest rate swap agreements. We seek to minimize counterparty credit risk by entering into transactions only with high-quality financial dealer institutions. These arrangements meet the definition of derivatives, but are not designated as hedging instruments under ASC 815, Derivatives and Hedging.

Following is a summary of key data related to interest rate swaps:

(in thousands)	March 31, 2018		December 31, 2017
Notional amount	$	4,844,472	$	4,490,884
Fair value included in other assets	18,657		28,402
Fair value included in other liabilities	47,904		26,902

The interest rate swap agreement with the loan customer and with the counterparty is reported at fair value in other assets and other liabilities on the Consolidated Balance Sheets with any resulting gain or loss recorded in current period earnings as other income or other expense.

Interest Rate Lock Commitments. Interest rate lock commitments represent an agreement to extend credit to a mortgage loan borrower, or an agreement to purchase a loan from a third-party originator, whereby the interest rate on the loan is set prior to funding. We are bound to fund the loan at a specified rate, regardless of whether interest rates have changed between the commitment date and the loan funding date, subject to the loan approval process. The borrower is not obligated to perform under the commitment. As such, outstanding IRLCs subject us to interest rate risk and related price risk during the period from the commitment to the borrower through the loan funding date, or commitment expiration. The IRLCs generally range between 30 to 270 days. The IRLCs are reported at fair value in other assets and other liabilities on the Consolidated Balance Sheets with any resulting gain or loss recorded in current period earnings as mortgage banking operations income.

Forward Delivery Commitments. Forward delivery commitments on mortgage-backed securities are used to manage the interest rate and price risk of our IRLCs and mortgage loan held for sale inventory by fixing the forward sale price that will be realized upon sale of the mortgage loans into the secondary market. Historical commitment-to-closing ratios are considered to estimate the quantity of mortgage loans that will fund within the terms of the IRLCs. The forward delivery contracts are reported at fair

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value in other assets and other liabilities on the Consolidated Balance Sheets with any resulting gain or loss recorded in current period earnings as mortgage banking operations income.

Credit Risk Contracts. We purchase and sell credit protection under risk participation agreements to share with other counterparties some of the credit exposure related to interest rate derivative contracts or to take on credit exposure to generate revenue. We will make/receive payments under these agreements if a customer defaults on their obligation to perform under certain derivative swap contracts.

Risk participation agreements sold with notional amounts totaling $128.7 million as of March 31, 2018 have remaining terms ranging from three months to nine years. Under these agreements, our maximum exposure assuming a customer defaults on their obligation to perform under certain derivative swap contracts with third parties would be $0.06 million and $0.1 million at March 31, 2018 and December 31, 2017, respectively. The fair values of risk participation agreements purchased and sold were $0.02 million and $(0.06) million, respectively, at December 31, 2018 and $0.04 million and $(0.1) million, respectively at December 31, 2017.

Counterparty Credit Risk

We are party to master netting arrangements with most of our swap derivative dealer counterparties. Collateral, usually marketable securities and/or cash, is exchanged between FNB and our counterparties, and is generally subject to thresholds and transfer minimums. For swap transactions that require central clearing, we post cash to our clearing agency. Collateral positions are settled or valued daily, and adjustments to amounts received and pledged by us are made as appropriate to maintain proper collateralization for these transactions.

Certain master netting agreements contain provisions that, if violated, could cause the counterparties to request immediate settlement or demand full collateralization under the derivative instrument. If we had breached our agreements with our derivative counterparties we would be required to settle our obligations under the agreements at the termination value and would be required to pay an additional $0.6 million and $0.9 million as of March 31, 2018 and December 31, 2017, respectively, in excess of amounts previously posted as collateral with the respective counterparty.

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The following table presents a reconciliation of the net amounts of derivative assets and derivative liabilities presented in the balance sheets to the net amounts that would result in the event of offset:

			Amount Not Offset in the Balance Sheet
(in thousands)	Net Amount Presented in the Balance Sheet		Financial Instruments		Cash Collateral		Net Amount
March 31, 2018
Derivative Assets
Interest rate contracts:
Designated	$	—	$	—	$	—	$	—
Not designated	3,481		3,451		—		30
Equity contracts – not designated	26		26		—		—
Total	$	3,507	$	3,477	$	—	$	30

Derivative Liabilities
Interest rate contracts:
Designated	$	3,662	$	3,662	$	—	$	—
Not designated	9,117		8,592		—		525
Total	$	12,779	$	12,254	$	—	$	525

December 31, 2017
Derivative Assets
Interest rate contracts:
Designated	$	228	$	228	$	—	$	—
Not designated	1,169		1,169		—		—
Equity contracts – not designated	51		51		—		—
Total	$	1,448	$	1,448	$	—	$	—

Derivative Liabilities
Interest rate contracts:
Designated	$	1,982	$	1,982	$	—	$	—
Not designated	11,599		10,940		—		659
Total	$	13,581	$	12,922	$	—	$	659

The following table presents the effect of certain derivative financial instruments on the income statement:

		Three Months Ended March 31,
(in thousands)	Income Statement Location	2018			2017
Interest Rate Contracts	Interest income - loans and leases	$	93		$	506
Interest Rate Contracts	Interest expense – short-term borrowings	(129		)	148
Interest Rate Swaps	Other income	(160		)	(219		)
Credit Risk Contracts	Other income	27			19

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NOTE 10.    COMMITMENTS, CREDIT RISK AND CONTINGENCIES

We have commitments to extend credit and standby letters of credit that involve certain elements of credit risk in excess of the amount stated in the Consolidated Balance Sheets. Our exposure to credit loss in the event of non-performance by the customer is represented by the contractual amount of those instruments. The credit risk associated with commitments to extend credit and standby letters of credit is essentially the same as that involved in extending loans and leases to customers and is subject to normal credit policies. Since many of these commitments expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements.

Following is a summary of off-balance sheet credit risk information:

(in thousands)	March 31, 2018		December 31, 2017
Commitments to extend credit	$	7,097,958	$	6,957,822
Standby letters of credit	136,661		132,904

At March 31, 2018, funding of 76.4% of the commitments to extend credit was dependent on the financial condition of the customer. We have the ability to withdraw such commitments at our discretion. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Based on management’s credit evaluation of the customer, collateral may be deemed necessary. Collateral requirements vary and may include accounts receivable, inventory, property, plant and equipment and income-producing commercial properties.

Standby letters of credit are conditional commitments issued by us that may require payment at a future date. The credit risk involved in issuing letters of credit is actively monitored through review of the historical performance of our portfolios.

In addition to the above commitments, subordinated notes issued by FNB Financial Services, LP, a wholly-owned finance subsidiary, are fully and unconditionally guaranteed by FNB. These subordinated notes are included in the summaries of short-term borrowings and long-term borrowings in Note 8.

Other Legal Proceedings

In the ordinary course of business, we are routinely named as defendants in, or made parties to, pending and potential legal actions. Also, as regulated entities, we are subject to governmental and regulatory examinations, information-gathering requests, and may be subject to investigations and proceedings (both formal and informal). Such threatened claims, litigation, investigations, regulatory and administrative proceedings typically entail matters that are considered incidental to the normal conduct of business. Claims for significant monetary damages may be asserted in many of these types of legal actions, while claims for disgorgement, restitution, penalties and/or other remedial actions or sanctions may be sought in regulatory matters. In these instances, if we determine that we have meritorious defenses, we will engage in an aggressive defense. However, if management determines, in consultation with counsel, that settlement of a matter is in the best interest of our Company and our shareholders, we may do so. It is inherently difficult to predict the eventual outcomes of such matters given their complexity and the particular facts and circumstances at issue in each of these matters. However, on the basis of current knowledge and understanding, and advice of counsel, we do not believe that judgments, sanctions, settlements or orders, if any, that may arise from these matters (either individually or in the aggregate, after giving effect to applicable reserves and insurance coverage) will have a material adverse effect on our financial position or liquidity, although they could have a material effect on net income in a given period.

In view of the inherent unpredictability of outcomes in litigation and governmental and regulatory matters, particularly where (i) the damages sought are indeterminate, (ii) the proceedings are in the early stages, or (iii) the matters involve novel legal theories or a large number of parties, as a matter of course, there is considerable uncertainty surrounding the timing or ultimate resolution of litigation and governmental and regulatory matters, including a possible eventual loss, fine, penalty, business or adverse reputational impact, if any, associated with each such matter. In accordance with applicable accounting guidance, we establish accruals for litigation and governmental and regulatory matters when those matters proceed to a stage where they present loss contingencies that are both probable and reasonably estimable. In such cases, there may be a possible exposure to loss in excess of any amounts accrued. We will continue to monitor such matters for developments that could affect the amount of the accrual, and will adjust the accrual amount as appropriate. If the loss contingency in question is not both probable and reasonably estimable, we do not establish an accrual and the matter will continue to be monitored for any developments that would make the loss contingency both probable and reasonably estimable. We believe that our accruals for legal proceedings

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are appropriate and, in the aggregate, are not material to our consolidated financial position, although future accruals could have a material effect on net income in a given period.

NOTE 11.    STOCK INCENTIVE PLANS

Restricted Stock

We issue restricted stock awards, consisting of both restricted stock and restricted stock units, to key employees under our Incentive Compensation Plan (Plan). We issue time-based awards and performance-based awards under this Plan, both of which are based on a three-year vesting period. The grant date fair value of the time-based awards is equal to the price of our common stock on the grant date. The fair value of the performance-based awards is based on a Monte-Carlo simulation valuation of our common stock as of the grant date. The assumptions used for this valuation include stock price volatility, risk-free interest rate and dividend yield.

For performance-based restricted stock awards granted, the recipients will earn shares, totaling between 0% and 175% of the number of units issued, based on our total stockholder return relative to a specified peer group of financial institutions over the three-year period. These market-based restricted stock units are included in the table below as if the recipients earned shares equal to 100% of the units issued, regardless of the actual vesting percentages.

As of March 31, 2018, we had available up to 2,636,450 shares of common stock to issue under this Plan.

The unvested restricted stock awards are eligible to receive cash dividends or dividend equivalents which are ultimately used to purchase additional shares of stock and are subject to forfeiture if the requisite service period is not completed or the specified performance criteria are not met. These awards are subject to certain accelerated vesting provisions upon retirement, death, disability or in the event of a change of control as defined in the award agreements.

The following table summarizes the activity relating to restricted stock awards during the periods indicated:

	Three Months Ended March 31,
	2018				2017
	Awards		Weighted Average Grant Price per Share		Awards		Weighted Average Grant Price per Share
Unvested awards outstanding at beginning of period	1,975,862		$	13.64	1,836,363		$	12.97
Vested	(7,631	)	12.83		(243,982	)	11.83
Forfeited/expired	(19,893	)	14.02		(2,950	)	13.00
Dividend reinvestment	16,373		14.37		12,253		14.54
Unvested awards outstanding at end of period	1,964,711		13.65		1,601,684		13.16

The following table provides certain information related to restricted stock awards:

(in thousands)	Three Months Ended March 31,
	2018		2017
Stock-based compensation expense	$	1,939	$	1,760
Tax benefit related to stock-based compensation expense	407		616
Fair value of awards vested	110		3,802

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As of March 31, 2018, there was $9.8 million of unrecognized compensation cost related to unvested restricted stock awards, including $0.6 million that is subject to accelerated vesting under the Plan’s immediate vesting upon retirement. The components of the restricted stock awards as of March 31, 2018 are as follows:

(dollars in thousands)	Service- Based Awards		Performance- Based Awards		Total
Unvested restricted stock awards	1,050,062		914,649		1,964,711
Unrecognized compensation expense	$	5,691	$	4,061	$	9,752
Intrinsic value	$	14,123	$	12,302	$	26,425
Weighted average remaining life (in years)	1.76		1.50		1.64

Stock Options

All outstanding stock options were assumed from acquisitions and are fully vested. Upon consummation of our acquisitions, all outstanding stock options issued by the acquired companies were converted into equivalent FNB stock options. We issue shares of treasury stock or authorized but unissued shares to satisfy stock options exercised.

The following table summarizes the activity relating to stock options during the periods indicated:

	Three Months Ended March 31,
	2018				2017
	Shares		Weighted Average Exercise Price per  Share		Shares		Weighted Average Exercise Price per  Share
Options outstanding at beginning of period	722,650		$	7.96	892,532		$	8.95
Assumed from acquisitions	—		—		207,645		8.92
Exercised	(163,035	)	7.79		(131,792	)	9.44
Forfeited/expired	(237	)	10.72		(49,281	)	10.91
Options outstanding and exercisable at end of period	559,378		8.03		919,104		8.77

The intrinsic value of outstanding and exercisable stock options at March 31, 2018 was $3.0 million. The aggregate intrinsic value represents the amount by which the fair value of underlying stock exceeds the option exercise price.

NOTE 12.    RETIREMENT PLANS

Our subsidiaries participate in a qualified 401(k) defined contribution plan under which employees may contribute a percentage of their salary. Employees are eligible to participate upon their first day of employment. Under this plan, we match 100% of the first six percent that the employee defers. Additionally, we may provide a performance-based company contribution of up to three percent if we exceed annual financial goals. Our contribution expense is presented in the following table:

	Three Months Ended March 31,
(in thousands)	2018		2017
401(k) contribution expense	$	3,610	$	2,767

We also sponsor an Employee Retirement Income Security Act of 1974 (ERISA) Excess Lost Match Plan for certain officers. This plan provides retirement benefits equal to the difference, if any, between the maximum benefit allowable under the Internal Revenue Code and the amount that would have been provided under the qualified 401(k) defined contribution plan, if no limits were applied.

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Additionally, we sponsor a qualified non-contributory defined benefit pension plan and two supplemental non-qualified retirement plans that have been frozen. The net periodic benefit credit for these plans includes the following components:

	Three Months Ended March 31,
(in thousands)	2018			2017
Service cost	$	(4	)	$	(4	)
Interest cost	1,560			1,477
Expected return on plan assets	(2,895		)	(2,427		)
Amortization:
Unrecognized prior service cost	—			2
Unrecognized loss	623			628
Net periodic pension credit	$	(716	)	$	(324	)

NOTE 13.      INCOME TAXES

The TCJA includes several changes to existing U.S. tax laws that impact us, most notably a reduction of the U.S. corporate income tax rate from35%to21%, which became effective January 1, 2018. We recognized the initial income tax effects of the TCJA in our 2017 financial statements in accordance with Staff Accounting Bulletin No. 118, which provides SEC staff guidance for the application of ASC 740, Income Taxes, in the reporting period in which the TCJA was signed into law. As such, our financial results reflect the income tax effects of the TCJA for which the accounting under ASC 740 is complete, as well as for provisional amounts for those specific income tax effects under ASC 740 that are incomplete, but a reasonable estimate could be determined. We did not identify any items for which the income tax effects of the TCJA have not been completed and a reasonable estimate could not be determined as of December 31, 2017, which was our first reporting date after the TCJA enactment.Examples of unavailable or unanalyzed information for which we have provisional estimates include deferred taxes related to depreciation (including lease financing), partnership earnings, and realized built-in losses from a prior acquisition. These estimates are subject to change as additional data is gathered, as interpretations and guidance are received, and as the final analyses are completed. The measurement period ends when we have analyzed the information necessary to finalize our accounting, but cannot extend beyond one year from the TCJA enactment date.

Income Tax Expense

Federal and state income tax expense and the statutory tax rate and the actual effective tax rate consist of the following:

	Three Months Ended March 31,
(in thousands)	2018			2017
Current income taxes:
Federal taxes	$	17,700		$	6,688
State taxes	1,704			499
Total current income taxes	19,404			7,187
Deferred income taxes:
Federal taxes	1,902			1,690
State taxes	(38		)	(2,393		)
Total deferred income taxes	1,864			(703		)
Total income taxes	$	21,268		$	6,484
Statutory tax rate	21.0		%	35.0		%
Effective tax rate	19.7		%	22.0		%

The effective tax rate for the quarter ended March 31, 2018 under the 21% TCJA statutory federal tax rate was 19.7%. The effective tax rate for the quarter ended March 31, 2017 under the former 35% statutory federal tax rate was 22.0%. The effective tax rate for the quarter ended March 31, 2018 was lower than the statutory tax rate of 21% due to tax benefits resulting

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from tax-exempt income on investments, loans, tax credits and income from BOLI. The lower effective tax rate for the quarter ended March 31, 2017 primarily related to merger expenses from the Yadkin acquisition.

In the fourth quarter of 2017, we elected to change our accounting policy under ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) to reclassify the income tax effects related to the TCJA from AOCI to retained earnings.

Deferred Income Taxes

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and tax purposes. Deferred tax assets and liabilities are measured based on the enacted tax rates that will apply in the years in which the temporary differences are expected to be recovered or paid. As such, during December 2017, we remeasured our deferred tax assets and liabilities as a result of the passage of the TCJA. The primary impact of this remeasurement was a reduction in deferred tax assets and liabilities in connection with the reduction of the U.S. corporate income tax rate from 35% to 21%.

NOTE 14.    OTHER COMPREHENSIVE INCOME

The following table presents changes in AOCI, net of tax, by component:

(in thousands)	Unrealized Net Losses on Debt Securities Available for Sale			Unrealized Net Gains (Losses) on Derivative Instruments			Unrecognized Pension and Postretirement Obligations			Total
Three Months Ended March 31, 2018
Balance at beginning of period	$	(29,626	)	$	5,407		$	(58,833	)	$	(83,052	)
Other comprehensive (loss) income before reclassifications	(29,787		)	3,804			484			(25,499		)
Amounts reclassified from AOCI	—			(173		)	—			(173		)
Net current period other comprehensive (loss) income	(29,787		)	3,631			484			(25,672		)
Balance at end of period	$	(59,413	)	$	9,038		$	(58,349	)	$	(108,724	)

The amounts reclassified from AOCI related to debt securities available for sale are included in net securities gains on the Consolidated Income Statements, while the amounts reclassified from AOCI related to derivative instruments are included in interest income on loans and leases on the Consolidated Income Statements.

The tax (benefit) expense amounts reclassified from AOCI in connection with the debt securities available for sale and derivative instruments reclassifications are included in income taxes on the Consolidated Statements of Income.

NOTE 15.    EARNINGS PER COMMON SHARE

Basic earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding net of unvested shares of restricted stock.

Diluted earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding, adjusted for the dilutive effect of potential common shares issuable for stock options, warrants and restricted shares, as calculated using the treasury stock method. Adjustments to the weighted average number of shares of common stock outstanding are made only when such adjustments dilute earnings per common share.

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The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended March 31,
(dollars in thousands, except per share data)	2018		2017
Net income	$	86,762	$	22,979
Less: Preferred stock dividends	2,010		2,010
Net income available to common stockholders	$	84,752	$	20,969
Basic weighted average common shares outstanding	323,740,956		237,379,260
Net effect of dilutive stock options, warrants and restricted stock	2,026,012		1,882,423
Diluted weighted average common shares outstanding	325,766,968		239,261,683
Earnings per common share:
Basic	$	0.26	$	0.09
Diluted	$	0.26	$	0.09

The following table shows the average shares excluded from the above calculation as their effect would have been anti-dilutive: 

	Three Months Ended March 31,
	2018	2017
Average shares excluded from the diluted earnings per common share calculation	21	81,755

NOTE 16.    CASH FLOW INFORMATION

Following is a summary of supplemental cash flow information:

	Three Months Ended March 31,
	2018		2017
(in thousands)
Interest paid on deposits and other borrowings	$	46,540	$	18,606
Transfers of loans to other real estate owned	3,954		20,517

NOTE 17.    BUSINESS SEGMENTS

We operate in four reportable segments: Community Banking, Wealth Management, Insurance and Consumer Finance.

• The Community Banking segment provides commercial and consumer banking services. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, international banking, business credit, capital markets and lease financing. Consumer banking products and services include deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services.

• The Wealth Management segment provides a broad range of personal and corporate fiduciary services including the administration of decedent and trust estates. In addition, it offers various alternative products, including securities brokerage and investment advisory services, mutual funds and annuities.

• The Insurance segment includes a full-service insurance agency offering all lines of commercial and personal insurance through major carriers. The Insurance segment also includes a reinsurer.

• The Consumer Finance segment primarily makes installment loans to individuals and purchases installment sales finance contracts from retail merchants. The Consumer Finance segment activity is funded through the sale of subordinated notes, which are issued by a wholly-owned subsidiary and guaranteed by us.

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The following tables provide financial information for these segments of FNB. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of FNB, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments to reconcile to the Consolidated Financial Statements.

(in thousands)	Community Banking		Wealth Management		Insurance		Consumer Finance		Parent and Other			Consolidated
At or for the Three Months Ended March 31, 2018
Interest income	$	263,587	$	—	$	20	$	9,294	$	26		$	272,927
Interest expense	42,360		—		—		910		3,552			46,822
Net interest income	221,227		—		20		8,384		(3,526		)	226,105
Provision for credit losses	12,412		—		—		2,083		—			14,495
Non-interest income	53,312		11,002		4,303		638		(1,752		)	67,503
Non-interest expense (1)	148,667		8,278		3,711		5,230		979			166,865
Amortization of intangibles	4,105		61		52		—		—			4,218
Income tax expense (benefit)	21,720		589		124		474		(1,639		)	21,268
Net income (loss)	87,635		2,074		436		1,235		(4,618		)	86,762
Total assets	31,424,150		25,129		20,529		169,737		12,808			31,652,353
Total intangibles	2,315,127		10,128		12,075		1,809		—			2,339,139
At or for the Three Months Ended March 31, 2017
Interest income	$	185,381	$	—	$	20	$	9,902	$	(610	)	$	194,693
Interest expense	18,865		—		—		922		2,154			21,941
Net interest income	166,516		—		20		8,980		(2,764		)	172,752
Provision for credit losses	9,064		—		—		1,786		—			10,850
Non-interest income	40,716		9,549		4,325		710		(184		)	55,116
Non-interest expense (1)	168,283		7,540		3,315		5,231		88			184,457
Amortization of intangibles	2,982		61		55		—		—			3,098
Income tax expense (benefit)	6,311		711		347		1,067		(1,952		)	6,484
Net income (loss)	20,592		1,237		628		1,606		(1,084		)	22,979
Total assets	29,978,061		22,130		20,514		184,006		(14,016		)	30,190,695
Total intangibles	2,332,352		10,353		12,285		1,809		—			2,356,799

(1) Excludes amortization of intangibles, which is presented separately.

NOTE 18.    FAIR VALUE MEASUREMENTS

Refer to Note 24 "Fair Value Measurements" to the Consolidated Financial Statements of the Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC on February 28, 2018 for a description of additional valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis. Assets and liabilities measured at fair value rarely transfer between Level 1 and Level 2 measurements. There were no such transfers during the three-month periods ended March 31, 2018 and 2017.

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The following table presents the balances of assets and liabilities measured at fair value on a recurring basis:

(in thousands)	Level 1		Level 2		Level 3		Total
March 31, 2018
Assets Measured at Fair Value
Debt securities available for sale
U.S. government-sponsored entities	$	—	$	358,648	$	—	$	358,648
Residential mortgage-backed securities:
Agency mortgage-backed securities	—		1,671,573		—		1,671,573
Agency collateralized mortgage obligations	—		832,350		—		832,350
Non-agency collateralized mortgage obligations	—		1		—		1
Commercial mortgage-backed securities	—		39,213		—		39,213
States of the U.S. and political subdivisions	—		21,023		—		21,023
Other debt securities	—		4,655		—		4,655
Total debt securities available for sale	—		2,927,463		—		2,927,463
Loans held for sale	—		21,610		—		21,610
Marketable equity securities
Fixed income mutual fund	177		—		—		177
Financial services industry	—		944		—		944
Total marketable equity securities	177		944		—		1,121
Derivative financial instruments
Trading	—		18,683		—		18,683
Not for trading	—		229		1,380		1,609
Total derivative financial instruments	—		18,912		1,380		20,292
Total assets measured at fair value on a recurring basis	$	177	$	2,968,929	$	1,380	$	2,970,486
Liabilities Measured at Fair Value
Derivative financial instruments
Trading	$	—	$	47,930	$	—	$	47,930
Not for trading	—		3,957		5		3,962
Total derivative financial instruments	—		51,887		5		51,892
Total liabilities measured at fair value on a recurring basis	$	—	$	51,887	$	5	$	51,892

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(in thousands)	Level 1		Level 2		Level 3		Total
December 31, 2017
Assets Measured at Fair Value
Debt securities available for sale
U.S. government-sponsored entities	$	—	$	343,942	$	—	$	343,942
Residential mortgage-backed securities:
Agency mortgage-backed securities	—		1,598,874		—		1,598,874
Agency collateralized mortgage obligations	—		794,957		—		794,957
Non-agency collateralized mortgage obligations	—		1		—		1
States of the U.S. and political subdivisions	—		21,093		—		21,093
Other debt securities	—		4,670		—		4,670
Total debt securities available for sale	—		2,763,537		—		2,763,537
Equity securities available for sale
Fixed income mutual fund	161		—		—		161
Financial services industry	—		864		—		864
Total equity securities available for sale	161		864		—		1,025
Total securities available for sale	161		2,764,401		—		2,764,562
Loans held for sale	—		56,458		—		56,458
Derivative financial instruments
Trading	—		28,453		—		28,453
Not for trading	—		500		1,594		2,094
Total derivative financial instruments	—		28,953		1,594		30,547
Total assets measured at fair value on a recurring basis	$	161	$	2,849,812	$	1,594	$	2,851,567
Liabilities Measured at Fair Value
Derivative financial instruments
Trading	$	—	$	26,953	$	—	$	26,953
Not for trading	—		2,239		5		2,244
Total derivative financial instruments	—		29,192		5		29,197
Total liabilities measured at fair value on a recurring basis	$	—	$	29,192	$	5	$	29,197

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The following table presents additional information about assets measured at fair value on a recurring basis and for which we have utilized Level 3 inputs to determine fair value:

(in thousands)	Other Debt Securities			Equity Securities			Residential Non-Agency Collateralized Mortgage Obligations			Interest Rate Lock Commitments			Total
Three Months Ended March 31, 2018
Balance at beginning of period	$	—		$	—		$	—		$	1,594		$	1,594
Purchases, issuances, sales and settlements:
Purchases	—			—			—			1,380			1,380
Settlements	—			—			—			(1,594		)	(1,594		)
Balance at end of period	$	—		$	—		$	—		$	1,380		$	1,380
Year Ended December 31, 2017
Balance at beginning of period	$	—		$	492		$	894		$	—		$	1,386
Total gains (losses) – realized/unrealized:
Included in earnings	—			—			4			—			4
Included in other comprehensive income	—			86			(6		)	—			80
Accretion included in earnings	(1		)	—			1			—			—
Purchases, issuances, sales and settlements:
Purchases	12,048			—			—			1,594			13,642
Sales/redemptions	(12,047		)	—			(874		)	—			(12,921		)
Settlements	—			—			(19		)	(4,569		)	(4,588		)
Transfers from Level 3	—			(578		)	—			—			(578		)
Transfers into Level 3	—			—			—			4,569			4,569
Balance at end of period	$	—		$	—		$	—		$	1,594		$	1,594

We review fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation attributes may result in reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in/out of Level 3 at fair value at the beginning of the period in which the changes occur. There were no transfers of assets or liabilities between the hierarchy levels during the first three months of 2018. During the first quarter of 2017, we acquired $12.0 million in other debt securities from YDKN that are measured at Level 3. These securities were sold during the second quarter of 2017. During the first three months of 2017, we transferred equity securities totaling $0.6 million from Level 3 to Level 2, as a result of increased trading activity relating to these securities.

For the three months ended March 31, 2018, we recorded in earnings $0.5 million of unrealized gains relating to the adoption of ASU 2016-01 and market value adjustments on marketable equity securities. These unrealized gains included in earnings are in the other non-interest income line item in the consolidated statement of income. For the three months ended March 31, 2017, there were no gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held as of those dates. The total realized net securities gains included in earnings are in the net securities gains line item in the Consolidated Statements of Income.

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In accordance with GAAP, from time to time, we measure certain assets at fair value on a non-recurring basis. These adjustments to fair value usually result from the application of the lower of cost or fair value accounting or write-downs of individual assets. Valuation methodologies used to measure these fair value adjustments were described in Note 24 "Fair Value Measurements" in our 2017 Form 10-K. For assets measured at fair value on a non-recurring basis still held at the balance sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios:

(in thousands)	Level 1		Level 2		Level 3		Total
March 31, 2018
Impaired loans	$	—	$	2,032	$	1,475	$	3,507
Other real estate owned	—		—		1,621		1,621
Other assets - SBA servicing asset	—		—		5,062		5,062
December 31, 2017
Impaired loans	$	—	$	2,813	$	1,297	$	4,110
Other real estate owned	—		10,513		10,823		21,336
Loans held for sale - SBA	—		—		36,432		36,432
Other assets - SBA servicing asset	—		—		5,058		5,058

Substantially all of the fair value amounts in the table above were estimated at a date during the three months or twelve months ended March 31, 2018 and December 31, 2017, respectively. Consequently, the fair value information presented is not necessarily as of the period’s end.

Impaired loans measured or re-measured at fair value on a non-recurring basis during the three months ended March 31, 2018 had a carrying amount of $3.5 million, which includes an allocated allowance for credit losses of $3.2 million. The allowance for credit losses includes a provision applicable to the current period fair value measurements of $2.7 million, which was included in the provision for credit losses for the three months ended March 31, 2018.

OREO with a carrying amount of $2.0 million was written down to $1.6 million, resulting in a loss of $0.4 million, which was included in earnings for the three months ended March 31, 2018.

Fair Value of Financial Instruments

The following methods and assumptions were used to estimate the fair value of each financial instrument:

Cash and Cash Equivalents, Accrued Interest Receivable and Accrued Interest Payable. For these short-term instruments, the carrying amount is a reasonable estimate of fair value.

Securities. For both securities AFS and securities HTM, fair value equals the quoted market price from an active market, if available, and is classified within Level 1. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities or pricing models, and is classified as Level 2. Where there is limited market activity or significant valuation inputs are unobservable, securities are classified within Level 3. Under current market conditions, assumptions used to determine the fair value of Level 3 securities have greater subjectivity due to the lack of observable market transactions.

Loans and Leases. The fair value of fixed rate loans and leases is estimated by discounting the future cash flows using the current rates at which similar loans and leases would be made to borrowers with similar credit ratings and for the same remaining maturities less an illiquidity discount, as the fair value measurement represents an exit price from a market participants' viewpoint. The fair value of variable and adjustable rate loans and leases approximates the carrying amount. Due to the significant judgment involved in evaluating credit quality, loans and leases are classified within Level 3 of the fair value hierarchy.

Loan Servicing Rights. For both MSRs and SBA servicing rights, both classified as Level 3 assets, fair value is determined using a discounted cash flow valuation method. These models use significant unobservable inputs including discount rates, prepayment rates and cost to service which have greater subjectivity due to the lack of observable market transactions.

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Derivative Assets and Liabilities. See Note 24 "Fair Value Measurements" to the Consolidated Financial Statements of the Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC on February 28, 2018 for a description of valuation methodologies for derivative assets and liabilities measured at fair value.

Deposits. The estimated fair value of demand deposits, savings accounts and certain money market deposits is the amount payable on demand at the reporting date because of the customers’ ability to withdraw funds immediately. The fair value of fixed-maturity deposits is estimated by discounting future cash flows using rates currently offered for deposits of similar remaining maturities.

Short-Term Borrowings. The carrying amounts for short-term borrowings approximate fair value for amounts that mature in 90 days or less. The fair value of subordinated notes is estimated by discounting future cash flows using rates currently offered.

Long-Term Borrowings. The fair value of long-term borrowings is estimated by discounting future cash flows based on the market prices for the same or similar issues or on the current rates offered to us for debt of the same remaining maturities.

Loan Commitments and Standby Letters of Credit. Estimates of the fair value of these off-balance sheet items were not made because of the short-term nature of these arrangements and the credit standing of the counterparties. Also, unfunded loan commitments relate principally to variable rate commercial loans, typically are non-binding, and fees are not normally assessed on these balances.

Nature of Estimates. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable to other financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Further, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.

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The fair values of our financial instruments are as follows:

					Fair Value Measurements
(in thousands)	Carrying Amount		Fair  Value		Level 1		Level 2		Level 3
March 31, 2018
Financial Assets
Cash and cash equivalents	$	386,329	$	386,329	$	386,329	$	—	$	—
Debt securities available for sale	2,927,463		2,927,463		—		2,927,463		—
Debt securities held to maturity	3,224,000		3,131,964		—		3,131,964		—
Net loans and leases, including loans held for sale	21,121,132		20,900,639		—		21,610		20,879,029
Loan servicing rights	35,853		41,878		—		—		41,878
Marketable equity securities	1,121		1,121		177		944		—
Derivative assets	20,292		20,292		—		18,912		1,380
Accrued interest receivable	95,082		95,082		95,082		—		—
Financial Liabilities
Deposits	22,497,089		22,441,017		17,755,830		4,685,187		—
Short-term borrowings	3,802,480		3,802,988		3,802,988		—		—
Long-term borrowings	659,890		663,085		—		—		663,085
Derivative liabilities	51,892		51,892		—		51,887		5
Accrued interest payable	12,762		12,762		12,762		—		—
December 31, 2017
Financial Assets
Cash and cash equivalents	$	479,443	$	479,443	$	479,443	$	—	$	—
Securities available for sale	2,764,562		2,764,562		161		2,764,401		—
Debt securities held to maturity	3,242,268		3,218,379		—		3,218,379		—
Net loans and leases, including loans held for sale	20,916,277		20,661,196		—		56,458		20,604,738
Loan servicing rights	34,111		37,758		—		—		37,758
Derivative assets	30,547		30,547		—		28,953		1,594
Accrued interest receivable	94,254		94,254		94,254		—		—
Financial Liabilities
Deposits	22,399,725		22,359,182		17,779,246		4,579,936		—
Short-term borrowings	3,678,337		3,678,723		3,678,723		—		—
Long-term borrowings	668,173		675,489		—		—		675,489
Derivative liabilities	29,197		29,197		—		29,192		5
Accrued interest payable	12,480		12,480		12,480		—		—

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Management’s Discussion and Analysis represents an overview of and highlights material changes to our financial condition and results of operations at and for the three-month periods ended March 31, 2018 and 2017. This Discussion and Analysis should be read in conjunction with the Consolidated Financial Statements and notes thereto contained herein and our 2017 Annual Report on Form 10-K filed with the SEC on February 28, 2018. Our results of operations for the three months ended March 31, 2018 are not necessarily indicative of results expected for the full year.

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

A number of statements in this Report may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 including our expectations relative to business and financial metrics, our outlook regarding revenues, expenses, earnings. liquidity, asset quality and statements regarding the impact of technology enhancements and customer and business process improvements.

All forward-looking statements speak only as of the date they are made and are based on information available at that time. We assume no obligation to update forward-looking statements to reflect circumstances or events that occur after the date the forward-looking statements were made or to reflect the occurrence of unanticipated events except as required by federal securities laws. As forward-looking statements involve significant risks and uncertainties, caution should be exercised against placing undue reliance on such statements.

Such forward-looking statements may be expressed in a variety of ways, including the use of future and present tense language expressing expectations or predictions of future financial or business performance or conditions based on current performance and trends. Forward-looking statements are typically identified by words such as, "believe," "plan," "expect," "anticipate," "intend," "outlook," "estimate," "forecast," "will," "should," "project," "goal," and other similar words and expressions. These forward-looking statements involve certain risks and uncertainties. In addition to factors previously disclosed in our reports filed with the SEC, the following factors among others, could cause actual results to differ materially from forward-looking statements or historical performance: changes in asset quality and credit risk; the inability to sustain revenue and earnings growth; changes in interest rates and capital markets; inflation; potential difficulties encountered in expanding into a new and remote geographic market; customer borrowing, repayment, investment and deposit practices; customer disintermediation; the introduction, withdrawal, success and timing of business and technology initiatives; competitive conditions; the inability to realize cost savings or revenues or to implement integration plans and other consequences associated with acquisitions and divestitures; inability to originate and re-sell mortgage loans in accordance with business plans; economic conditions; interruption in or breach of security of our information systems; integrity and functioning of products, information systems and services provided by third party external vendors; changes in tax rules and regulations or interpretations including, but not limited to, the recently enacted Tax Cuts and Jobs Act;changes in accounting policies, standards and interpretations; liquidity risk; changes in asset valuations;and the impact, extent and timing of technological changes, capital management activities, and other actions of the OCC, the FRB, the Consumer Financial Protection Bureau, the FDIC and legislative and regulatory actions and reforms.

Actual results may differ materially from those expressed or implied as a result of these risks and uncertainties, including, but not limited to, the risk factors and other uncertainties described in our Annual Report on Form 10-K for the year ended December 31, 2017, our subsequent 2018 Quarterly Reports on Form 10-Q's (including the risk factors and risk management discussions) and our other subsequent filings with the SEC, which are available on our corporate website at https://www.fnb-online.com/about-us/investor-relations-shareholder-services. We have included our web address as an inactive textual reference only. Information on our website is not part of this Report.

APPLICATION OF CRITICAL ACCOUNTING POLICIES

A description of our critical accounting policies is included in the Management’s Discussion and Analysis of Financial Condition and Results of Operations section of our 2017 Annual Report on Form 10-K filed with the SEC on February 28, 2018 under the heading “Application of Critical Accounting Policies.” There have been no significant changes in critical accounting policies or the assumptions and judgments utilized in applying these policies since December 31, 2017.

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USE OF NON-GAAP FINANCIAL MEASURES AND KEY PERFORMANCE INDICATORS

To supplement our Consolidated Financial Statements presented in accordance with GAAP, we use certain non-GAAP financial measures, such as operating net income available to common stockholders, operating earnings per diluted common share, return on average tangible common equity, return on average tangible assets, tangible book value per common share, the ratio of tangible equity to tangible assets, the ratio of tangible common equity to tangible assets, efficiency ratio and net interest margin (FTE) to provide information useful to investors in understanding our operating performance and trends, and to facilitate comparisons with the performance of our peers. Management uses these measures internally to assess and better understand our underlying business performance and trends related to core business activities. The non-GAAP financial measures and key performance indicators we use may differ from the non-GAAP financial measures and key performance indicators other financial institutions use to assess their performance and trends.

These non-GAAP financial measures should be viewed as supplemental in nature, and not as a substitute for or superior to, our reported results prepared in accordance with GAAP. When non-GAAP financial measures are disclosed, the SEC's Regulation G requires: (i) the presentation of the most directly comparable financial measure calculated and presented in accordance with GAAP and (ii) a reconciliation of the differences between the non-GAAP financial measure presented and the most directly comparable financial measure calculated and presented in accordance with GAAP. Reconciliations of non-GAAP operating measures to the most directly comparable GAAP financial measures are included later in this report under the heading “Reconciliation of Non-GAAP Financial Measures and Key Performance Indicators to GAAP.”

Management believes merger expenses are not organic costs to run our operations and facilities. These charges principally represent expenses to satisfy contractual obligations of the acquired entity without any useful benefit to us to convert and consolidate the entity’s records, systems and data onto our platforms and professional fees related to the transaction. These costs are specific to each individual transaction, and may vary significantly based on the size and complexity of the transaction.

Management also considers the remeasurement of the deferred tax assets and liabilities due to the reduction in the corporate tax rate to be a significant item impacting earnings.  This tax item is specific to the TCJA that was signed into law in December 2017 which included a reduction of the U.S. corporate income tax rate from 35% to 21%, effective January 1, 2018.  We recognized the income tax effects of the net deferred tax asset revaluation in our 2017 financial statements.  We believe adjusting for this tax change gives supplemental comparative data from the prior years’ presentation.

For the calculation of net interest margin and efficiency ratio, net interest income amounts are reflected on a fully taxable equivalent basis which adjusts for the tax benefit of income on certain tax-exempt loans and investments using the federal statutory tax rate of 21% in 2018 and 35% in 2017. We use these non-GAAP measures to provide an economic view believed to be the preferred industry measurement for these items and to provide relevant comparison between taxable and non-taxable amounts.

FINANCIAL SUMMARY

Net income available to common stockholders for the first quarter of 2018 was $84.8 million or $0.26 per diluted share. Revenue (net interest income plus non-interest income) of $293.6 million for the first quarter of 2018 reflects continued loan and deposit growth and growth in non-interest income.

FNB made progress towards our long-term strategic goals with strong performances in several key areas during the first quarter of 2018. Our operating net income available to common stockholders and earnings per common share increased 56% and 13%, respectively, compared to the prior year, led by solid growth in loans and in our fee-based businesses. We are well-positioned across our footprint to build on those trends and continue to improve our key operating metrics, as we maintain our focus on delivering earnings per share growth and improved profitability.

Income Statement Highlights (First quarter of 2018 compared to first quarter of 2017)

• Net income available to common stockholders was $84.8 million, compared to $21.0 million.

• Operating net income available to common stockholders (non-GAAP) was $84.8 million, compared to $54.4 million.

• Earnings per diluted common share was $0.26, compared to $0.09.

• Operating earnings per diluted common share (non-GAAP) was $0.26, compared to $0.23.

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• Non-interest income was $67.5 million, compared to $55.1 million, due to the benefit of new markets and the further expansion of business lines, including wealth management, capital markets, mortgage banking and insurance.

• Net interest margin (FTE) (non-GAAP) was 3.39%, compared to 3.35%.

• Non-interest expense was $171.1 million compared to $187.6 million. Non-interest expense, excluding merger-related costs, was $171.1 million, compared to $134.8 million.

• Income tax expense increased $14.8 million, or 228.0%, primarily due to higher 2018 net income partially offset by the lower tax rate in 2018. Income tax expense in the first quarter of 2017 was impacted by merger-related expenses.

• The efficiency ratio (non-GAAP) improved to 55.8%, compared to 57.2%.

• The annualized net charge-offs to total average loans ratio was unchanged at 0.20%.

Balance Sheet Highlights (period-end balances, March 31, 2018 compared to December 31, 2017, unless otherwise indicated)

• Total assets were $31.7 billion, compared to $31.4 billion.

• Total stockholders’ equity was $4.4 billion for both periods with a slight increase of less than 1% since December 31, 2017.

• Loans grew 5.4% from March 31, 2017 to March 31, 2018 through continued organic growth.

• Deposits grew 5.5% from March 31, 2017 to March 31, 2018 through continued organic growth.

• The ratio of loans to deposits was 94.5%, compared to 93.7%.

• Asset quality was satisfactory with a delinquency ratio of 0.79% on the originated portfolio, compared to 0.88%.

RESULTS OF OPERATIONS

Three Months EndedMarch 31, 2018 Compared to the Three Months EndedMarch 31, 2017

Net income available to common stockholders for the three months ended March 31, 2018 was $84.8 million or $0.26 per diluted common share, compared to net income available to common stockholders for the three months ended March 31, 2017 of $21.0 million or $0.09 per diluted common share. The first three months of 2017 included merger-related expense of $52.7 million. There were no merger-related expenses recorded during the first three months of 2018. Operating earnings per diluted common share (non-GAAP) was $0.26 for the first three months of 2018 compared to $0.23 for the three months ended March 31, 2017. The effective tax rate for the first quarter of 2018 was 19.7%, compared to 22.0% in the year-ago quarter. The current quarter was impacted by the TCJA-enacted 21% statutory rate, while the year-ago quarter was impacted by merger-related expenses. Average diluted common shares outstanding increased 86.5 million shares, or 36.2%, to 325.8 million shares for the first three months of 2018, primarily as a result of the YDKN acquisition, for which we issued 111.6 million shares. The major categories of the income statement and their respective impact to the increase (decrease) in net income are presented in the following table:

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TABLE 1

	Three Months Ended March 31,				$			%
(in thousands, except per share data)	2018		2017		Change			Change
Net interest income	$	226,105	$	172,752	$	53,353		30.9	%
Provision for credit losses	14,495		10,850		3,645			33.6
Non-interest income	67,503		55,116		12,387			22.5
Non-interest expense	171,083		187,555		(16,472		)	(8.8	)
Income taxes	21,268		6,484		14,784			228.0
Net income	86,762		22,979		63,783			277.6
Less: Preferred stock dividends	2,010		2,010		—			—
Net income available to common stockholders	$	84,752	$	20,969	$	63,783		304.2	%
Earnings per common share – Basic	$	0.26	$	0.09	$	0.17		188.9	%
Earnings per common share – Diluted	0.26		0.09		0.17			188.9
Cash dividends per common share	0.12		0.12		—			—

The following table presents selected financial ratios and other relevant data used to analyze our performance:

TABLE 2

	Three Months Ended March 31,
	2018			2017
Return on average equity	7.94		%	3.10		%
Return on average tangible common equity (2)	18.01		%	6.14		%
Return on average assets	1.12		%	0.39		%
Return on average tangible assets (2)	1.25		%	0.45		%
Book value per common share (1)	$	13.37		$	13.16
Tangible book value per common share (1) (2)	$	6.14		$	5.86
Equity to assets (1)	14.01		%	14.43		%
Tangible equity to tangible assets (1) (2)	7.14		%	7.18		%
Common equity to assets (1)	13.67		%	14.07		%
Tangible common equity to tangible assets (1) (2)	6.78		%	6.80		%
Dividend payout ratio	46.10		%	121.83		%
Average equity to average assets	14.07		%	12.50		%

⁽¹⁾ Period-end ⁽²⁾ Non-GAAP

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The following table provides information regarding the average balances and yields earned on interest-earning assets (non-GAAP) and the average balances and rates paid on interest-bearing liabilities:

TABLE 3          

	Three Months Ended March 31,
	2018								2017
(dollars in thousands)	Average Balance			Interest Income/ Expense			Yield/ Rate		Average Balance			Interest Income/ Expense			Yield/ Rate
Assets
Interest-earning assets:
Interest-bearing deposits with banks	$	103,904		$	360		1.40	%	$	85,663		$	180		0.85	%
Federal funds sold	—			—			—		4,579			8			0.72
Taxable investment securities (1)	5,046,294			26,879			2.13		4,479,439			22,479			2.01
Tax-exempt investment securities (1)(2)	951,021			8,278			3.48		500,206			5,190			4.15
Loans held for sale	65,897			911			5.56		12,358			163			5.61
Loans and leases (2) (3)	21,155,619			239,602			4.58		16,190,470			170,195			4.26
Total interest-earning assets (2)	27,322,735			276,030			4.08		21,272,715			198,215			3.77
Cash and due from banks	358,717								294,739
Allowance for credit losses	(180,478		)						(161,371		)
Premises and equipment	336,816								273,908
Other assets	3,656,716								2,382,108
Total assets	$	31,494,506							$	24,062,099
Liabilities
Interest-bearing liabilities:
Deposits:
Interest-bearing demand	$	9,388,774		11,454			0.49		$	7,416,346		4,831			0.26
Savings	2,536,439			1,031			0.17		2,412,798			521			0.09
Certificates and other time	4,637,032			13,984			1.20		2,889,129			6,388			0.90
Short-term borrowings	3,985,254			15,207			1.54		3,202,033			6,674			0.84
Long-term borrowings	660,970			5,146			3.16		534,762			3,527			2.68
Total interest-bearing liabilities	21,208,469			46,822			0.89		16,455,068			21,941			0.54
Non-interest-bearing demand	5,607,640								4,414,354
Other liabilities	248,128								184,824
Total liabilities	27,064,237								21,054,246
Stockholders’ equity	4,430,269								3,007,853
Total liabilities and stockholders’ equity	$	31,494,506							$	24,062,099
Excess of interest-earning assets over interest-bearing liabilities	$	6,114,266							$	4,817,647
Net interest income (FTE) (2)				229,208								176,274
Tax-equivalent adjustment				(3,103		)						(3,522		)
Net interest income				$	226,105							$	172,752
Net interest spread							3.19	%							3.23	%
Net interest margin (2)							3.39	%							3.35	%

(1) The average balances and yields earned on securities are based on historical cost.

(2) The interest income amounts are reflected on an FTE basis (non-GAAP), which adjusts for the tax benefit of income on certain tax-exempt loans and investments using the federal statutory tax rate of 21% in 2018 and 35% in 2017. The yield on earning assets and the net interest margin are presented on an FTE basis. We believe this measure to be the preferred industry measurement of net interest income and provides relevant comparison between taxable and non-taxable amounts.

(3) Average balances include non-accrual loans. Loans and leases consist of average total loans less average unearned income.

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Net Interest Income

For the three months ended March 31, 2018, net interest income, which comprised 77.0% of revenue compared to 75.8% for the same period in 2017, was affected by the general level of interest rates, changes in interest rates, the timing of repricing of assets and liabilities, the shape of the yield curve, the level of non-accrual loans and changes in the amount and mix of interest-earning assets and interest-bearing liabilities.

Net interest income on an FTE basis (non-GAAP) increased $52.9 million or 30.0% from $176.3 million for the first three months of 2017 to $229.2 million for the first three months of 2018. Average interest-earning assets of $27.3 billion increased $6.1 billion or 28.4% and average interest-bearing liabilities of $21.2 billion increased $4.8 billion or 28.9% from the first quarter of 2017 due to the Yadkin acquisition and organic growth in loans and deposits. Our net interest margin FTE (non-GAAP) was 3.39% for the first three months of 2018, compared to 3.35% for the same period of 2017, due to a higher interest rate environment, as well as higher purchase accounting accretion. The tax-equivalent adjustments (non-GAAP) to net interest income from amounts reported on our financial statements are shown in the preceding table.

The following table provides certain information regarding changes in net interest income on an FTE basis (non-GAAP) attributable to changes in the average volumes and yields earned on interest-earning assets and the average volume and rates paid for interest-bearing liabilities for the three months ended March 31, 2018, compared to the three months ended March 31, 2017:

TABLE 4

(in thousands)	Volume			Rate			Net
Interest Income
Interest-bearing deposits with banks	$	44		$	136		$	180
Federal funds sold	(4		)	(4		)	(8		)
Securities (2)	7,001			487			7,488
Loans held for sale	736			9			745
Loans and leases (2)	55,292			14,118			69,410
Total interest income (2)	63,069			14,746			77,815
Interest Expense
Deposits:
Interest-bearing demand	1,761			4,862			6,623
Savings	17			493			510
Certificates and other time	4,735			2,861			7,596
Short-term borrowings	2,114			6,419			8,533
Long-term borrowings	988			631			1,619
Total interest expense	9,615			15,266			24,881
Net change (2)	$	53,454		$	(520	)	$	52,934

(1) The amount of change not solely due to rate or volume changes was allocated between the change due to rate and the change due to volume based on the net size of the rate and volume changes.

(2) Interest income amounts are reflected on an FTE basis (non-GAAP) which adjusts for the tax benefit of income on certain tax-exempt loans and investments using the federal statutory tax rate of 21% in 2018 and 35% in 2017. We believe this measure to be the preferred industry measurement of net interest income and provides relevant comparison between taxable and non-taxable amounts.

Interest income on an FTE basis (non-GAAP) of $276.0 million for the first three months of 2018, increased $77.8 million or 39.3% from the same quarter of 2017, primarily due to increased interest-earning assets. During the first three months of 2018 and 2017, we recognized $5.9 million and $3.4 million, respectively, in incremental purchase accounting accretion and cash recoveries on acquired loans; the 2018 increase included $1.8 million of higher incremental purchase accounting accretion and $0.7 million of higher cash recoveries. The increase in interest-earning assets was primarily driven by a $5.0 billion or 30.7% increase in average loans and leases, which reflects the benefit of our expanded banking footprint resulting from the YDKN acquisition and successful sales management, and includes $1.1 billion or 5.5% of organic growth. Additionally, average securities increased $1.0 billion or 20.4%, primarily as a result of the securities portfolio acquired from YDKN and the subsequent repositioning of that portfolio. The yield on average interest-earning assets (non-GAAP) increased 31 basis points

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from the first three months of 2017 to 4.08% for the first three months of 2018. The 31 basis points increase in earning asset yield was driven by an increase in yields in both investments and loans.  

Interest expense of $46.8 million for the first three months of 2018 increased $24.9 million or 113.4% from the same quarter of 2017 due to an increase in rates paid and growth in average interest-bearing liabilities, as interest-bearing deposits and short-term borrowings increased over the same quarter of 2017. Average interest-bearing deposits increased $3.8 billion or 30.2%, which reflects the benefit of our expanded banking footprint resulting from the YDKN acquisition, including $2.9 billion added at closing of the YDKN acquisition and organic growth in transaction deposits. Average short-term borrowings increased $783.2 million or 24.5%, primarily as a result of increases of $347.3 million in short-term FHLB borrowings and $449.7 million in federal funds purchased. Average long-term borrowings increased $126.2 million or 23.6%, primarily as a result of increases of $47.5 million, $46.8 million and $32.1 million in junior subordinated debt, subordinated debt and long-term FHLB advances, respectively, assumed in the YDKN transaction. Subsequent to the close of the acquisition, we remixed the long–term position based on our funding needs. The rate paid on interest-bearing liabilities increased 35 basis points to 0.89% for the first three months of 2018, due to the Federal Open Market Committee interest rate increases and changes in the funding mix.

Provision for Credit Losses

The provision for credit losses is determined based on management’s estimates of the appropriate level of allowance for credit losses needed to absorb probable losses inherent in the loan and lease portfolio, after giving consideration to charge-offs and recoveries for the period. The following table presents information regarding the provision for credit losses and net charge-offs:

TABLE 5

	Three Months Ended March 31,						$			%
(dollars in thousands)	2018			2017			Change			Change
Provision for credit losses:
Originated	$	14,770		$	11,337		$	3,433		30.3	%
Acquired	(275		)	(487		)	212			(43.5	)
Total provision for credit losses	$	14,495		$	10,850		$	3,645		33.6	%
Net loan charge-offs:
Originated	$	11,042		$	7,914		$	3,128		39.5	%
Acquired	(414		)	213			(627		)	(294.4	)
Total net loan charge-offs	$	10,628		$	8,127		$	2,501		30.8	%
Net loan charge-offs (annualized) / total average loans and leases	0.20		%	0.20		%
Net originated loan charge-offs (annualized) / total average originated loans and leases	0.29		%	0.25		%

The provision for credit losses of $14.5 million during the first three months of 2018 increased $3.6 million from the same period of 2017, primarily due to an increase of $3.4 million in the provision for the originated portfolio, which was attributable to higher organic loan growth during the first quarter of 2018 compared to the prior year-ago period, as well as additional reserves that were needed to cover higher charge-offs during the current period. For additional information relating to the allowance and provision for credit losses, refer to the Allowance for Credit Losses section of this Management’s Discussion and Analysis.

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Non-Interest Income

The breakdown of non-interest income for the three months ended March 31, 2018 and 2017 is presented in the following table:

TABLE 6

	Three Months Ended March 31,				$			%
(dollars in thousands)	2018		2017		Change			Change
Service charges	$	30,077	$	24,581	$	5,496		22.4	%
Trust services	6,448		5,747		701			12.2
Insurance commissions and fees	5,135		5,141		(6		)	(0.1	)
Securities commissions and fees	4,319		3,623		696			19.2
Capital markets income	5,214		3,847		1,367			35.5
Mortgage banking operations	5,529		3,790		1,739			45.9
Bank owned life insurance	3,285		2,153		1,132			52.6
Net securities gains	—		2,625		(2,625		)	(100.0	)
Other	7,496		3,609		3,887			107.7
Total non-interest income	$	67,503	$	55,116	$	12,387		22.5	%

Total non-interest income increased $12.4 million, to $67.5 million for the first three months of 2018, a 22.5% increase from the same period of 2017. The variances in significant individual non-interest income items are further explained in the following paragraphs, with most increases relating at least partially to expanded operations from the acquisition of YDKN in March of 2017.

Service charges on loans and deposits of $30.1 million for the first three months of 2018 increased $5.5 million or 22.4% from the same period of 2017. The increase was driven by the expanded customer base due to the YDKN acquisition, combined with organic growth in loans and deposit accounts.

Trust services of $6.4 million for the first three months of 2018 increased $0.7 million or 12.2% from the same period of 2017, primarily driven by strong organic growth activity and improved market conditions. The market value of assets under management increased $715.9 million or 16.9% to $4.9 billion from March 31, 2017 to March 31, 2018.

Securities commissions and fees of $4.3 million for the first three months of 2018 increased 19.2% from the same period of 2017. This increase reflects the benefit of expanded operations in North and South Carolina.

Capital markets income of $5.2 million for the first three months of 2018 increased $1.4 million or 35.5% from $3.8 million for 2017, as we earned more in fees through our commercial loans interest rate swap program, reflecting stronger demand from commercial loan customers to swap floating-rate interest payments for fixed-rate interest payments, enabling those customers to better manage their interest rate risk.

Mortgage banking operations income of $5.5 million for the first three months of 2018 increased $1.7 million or 45.9% from the same period of 2017. During the first three months of 2018, we sold $265.0 million of residential mortgage loans, a 98.5% increase compared to $133.5 million for the same period of 2017. However, sold loan margins have been lower in both retail and correspondent loans due to competitive pressure.

Income from BOLI of $3.3 million for the first three months of 2018 increased $1.1 million or 52.6% from $2.2 million in the same period of 2017, due to a combination of BOLI policies acquired from YDKN and investing in two new policies during the third and fourth quarters of 2017.

Net securities gains were $2.6 million for the first three months of 2017. These gains related to the sale of certain acquired YDKN securities after the closing of the acquisition. We did not record any securities gains for the first three months of 2018.

Other non-interest income was $7.5 million and $3.6 million for the first three months of 2018 and 2017, respectively. During the first three months of 2018, dividends on non-marketable equity securities increased by $2.3 million and SBA loan gain on sale and servicing-related income increased $1.4 million compared to the year-ago quarter.

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Non-Interest Expense

The breakdown of non-interest expense for the three months ended March 31, 2018 and 2017 is presented in the following table:

TABLE 7

	Three Months Ended March 31,				$			%
(dollars in thousands)	2018		2017		Change			Change
Salaries and employee benefits	$	89,326	$	73,578	$	15,748		21.4	%
Net occupancy	15,568		11,349		4,219			37.2
Equipment	14,465		9,630		4,835			50.2
Amortization of intangibles	4,218		3,098		1,120			36.2
Outside services	14,725		13,043		1,682			12.9
FDIC insurance	8,834		5,387		3,447			64.0
Supplies	1,684		2,196		(512		)	(23.3	)
Bank shares and franchise taxes	3,452		2,980		472			15.8
Merger-related	—		52,724		(52,724		)	(100.0	)
Other	18,811		13,570		5,241			38.6
Total non-interest expense	$	171,083	$	187,555	$	(16,472	)	(8.8	)%

Total non-interest expense of $171.1 million for the first three months of 2018 decreased $16.5 million, an 8.8% decrease from the same period of 2017. The variances in the individual non-interest expense items are further explained in the following paragraphs, with most increases relating at least partially to costs associated with expanded operations due to the acquisition of YDKN in March of 2017, offset by merger-related expenses of $52.7 million in the year-ago quarter.

Salaries and employee benefits of $89.3 million for the first three months of 2018 increased $15.7 million or 21.4% from the same period of 2017, primarily due to employees added in conjunction with the YDKN acquisition, combined with 2017 merit increases and higher benefit costs.

Net occupancy and equipment expense of $30.0 million for the first three months of 2018 increased $9.1 million or 43.2% from the same period of 2017, primarily due to the YDKN acquisition, and our presence in that new market, and our continued investment in new technology. The increased technology costs include upgrades to meet customer needs via the utilization of electronic delivery channels, such as online and mobile banking, investment in infrastructure to support our larger company and expenditures deemed necessary by management to maintain proficiency and compliance with expanding regulatory requirements.

Amortization of intangibles expense of $4.2 million for the first three months of 2018 increased $1.1 million or 36.2% from the first three months of 2017, due to the additional core deposit intangibles added as a result of the acquisition of YDKN.

Outside services expense of $14.7 million for the first three months of 2018 increased $1.7 million or 12.9% from the same period of 2017, primarily due to an increase of $0.7 million in legal expense, combined with various other miscellaneous increases. These increases were driven primarily by the YDKN acquisition.

FDIC insurance of $8.8 million for the first three months of 2018 increased $3.4 million or 64.0% from the same period of 2017, primarily due to a higher assessment base resulting from merger and acquisition activity combined with an increased rate due to YDKN's construction loan portfolio.

Other non-interest expense was $18.8 million and $13.6 million for the first three months of 2018 and 2017, respectively. During the first three months of 2018, business development costs increased by $1.0 million, miscellaneous losses increased by $0.9 million, historic and other tax credit investments expense increased by $0.8 million and marketing expense increased by $0.8 million. These increases were primarily related to the expanded operations in North and South Carolina.

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Income Taxes

The following table presents information regarding income tax expense and certain tax rates:

TABLE 8

	Three Months Ended March 31,
(dollars in thousands)	2018			2017
Income tax expense	$	21,268		$	6,484
Effective tax rate	19.7		%	22.0		%
Statutory tax rate	21.0		%	35.0		%

Both periods’ tax rates are lower than the federal statutory tax rates of 21% in 2018 and 35% in 2017, due to the tax benefits primarily resulting from tax-exempt income on investments and loans, tax credits and income from BOLI. The effective tax rate for the first quarter of 2018 was 19.7%, compared to 22.0% in the year-ago quarter. The current quarter was impacted by the TCJA-enacted 21% federal statutory rate while the year-ago quarter was impacted by merger-related expenses.

FINANCIAL CONDITION

The following table presents our condensed Consolidated Balance Sheets:

TABLE 9

(dollars in thousands)	March 31, 2018		December 31, 2017		$ Change			% Change
Assets
Cash and cash equivalents	$	386,329	$	479,443	$	(93,114	)	(19.4	)%
Securities	6,151,463		6,006,830		144,633			2.4
Loans held for sale	37,982		92,891		(54,909		)	(59.1	)
Loans and leases, net	21,083,150		20,823,386		259,764			1.2
Goodwill and other intangibles	2,339,139		2,341,263		(2,124		)	(0.1	)
Other assets	1,654,290		1,673,822		(19,532		)	(1.2	)
Total Assets	$	31,652,353	$	31,417,635	$	234,718		0.7	%
Liabilities and Stockholders’ Equity
Deposits	$	22,497,089	$	22,399,725	$	97,364		0.4	%
Borrowings	4,462,370		4,346,510		115,860			2.7
Other liabilities	259,441		262,206		(2,765		)	(1.1	)
Total liabilities	27,218,900		27,008,441		210,459			0.8
Stockholders’ equity	4,433,453		4,409,194		24,259			0.6
Total Liabilities and Stockholders’ Equity	$	31,652,353	$	31,417,635	$	234,718		0.7	%

Non-Performing Assets

Non-performing assets increased $4.4 million, from $138.7 million at December 31, 2017 to $143.1 million at March 31, 2018. This reflects increases of $3.0 million in non-accrual loans, $1.0 million in TDRs and $0.4 million in OREO. The increase in non-accrual loans is attributable to the migration of two commercial borrowers in the commercial and industrial portfolio, and a few smaller borrowers in the commercial real estate portfolio. The increase in TDRs is related to the modification of a commercial and industrial credit during the first quarter of 2018. The increase in OREO is the result of residential transfers during the first quarter of 2018 outpacing the properties that were sold during this same period.

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Following is a summary of total non-performing loans and leases, by class:

TABLE 10

(in thousands)	March 31, 2018		December 31, 2017		$ Change			% Change
Commercial real estate	$	33,697	$	31,399	$	2,298		7.3	%
Commercial and industrial	25,587		22,740		2,847			12.5
Commercial leases	1,399		1,574		(175		)	(11.1	)
Other	1,000		1,000		—			—
Total commercial loans and leases	61,683		56,713		4,970			8.8
Direct installment	15,722		16,725		(1,003		)	(6.0	)
Residential mortgages	16,135		16,409		(274		)	(1.7	)
Indirect installment	2,424		2,435		(11		)	(0.5	)
Consumer lines of credit	6,172		5,834		338			5.8
Total consumer loans	40,453		41,403		(950		)	(2.3	)
Total non-performing loans and leases	$	102,136	$	98,116	$	4,020		4.1	%

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Following is a summary of performing, non-performing and non-accrual TDRs, by class:

TABLE 11

(in thousands)	Performing		Non- Performing		Non- Accrual		Total
Originated
March 31, 2018
Commercial real estate	$	86	$	—	$	3,929	$	4,015
Commercial and industrial	2,750		1,230		587		4,567
Total commercial loans	2,836		1,230		4,516		8,582
Direct installment	11,092		7,241		3,546		21,879
Residential mortgages	3,716		10,881		2,011		16,608
Indirect installment	—		190		12		202
Consumer lines of credit	1,881		1,741		583		4,205
Total consumer loans	16,689		20,053		6,152		42,894
Total TDRs	$	19,525	$	21,283	$	10,668	$	51,476
December 31, 2017
Commercial real estate	$	92	$	—	$	3,870	$	3,962
Commercial and industrial	3,085		—		601		3,686
Total commercial loans	3,177		—		4,471		7,648
Direct installment	10,890		7,758		3,197		21,845
Residential mortgages	3,659		10,638		2,161		16,458
Indirect installment	—		195		14		209
Consumer lines of credit	1,812		1,582		629		4,023
Total consumer loans	16,361		20,173		6,001		42,535
Total TDRs	$	19,538	$	20,173	$	10,472	$	50,183
Acquired
March 31, 2018
Commercial real estate	$	—	$	2,613	$	—	$	2,613
Commercial and industrial	—		—		—		—
Total commercial loans	—		2,613		—		2,613
Direct installment	—		70		—		70
Residential mortgages	—		—		—		—
Indirect installment	—		—		—		—
Consumer lines of credit	249		486		357		1,092
Total consumer loans	249		556		357		1,162
Total TDRs	$	249	$	3,169	$	357	$	3,775
December 31, 2017
Commercial real estate	$	—	$	2,651	$	—	$	2,651
Commercial and industrial	—		—		—		—
Total commercial loans	—		2,651		—		2,651
Direct installment	15		71		—		86
Residential mortgages	—		—		—		—
Indirect installment	—		—		—		—
Consumer lines of credit	251		586		234		1,071
Total consumer loans	266		657		234		1,157
Total TDRs	$	266	$	3,308	$	234	$	3,808

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Allowance for Credit Losses

The allowance for credit losses of $179.2 million at March 31, 2018 increased $3.9 million or 2.2% from December 31, 2017, primarily in support of growth in originated loans and leases and a small increase in criticized commercial loans. The provision for credit losses during the three months ended March 31, 2018 was $14.5 million, which covered net charge-offs and supported higher organic loan growth. The amount of provision expense that resulted from the aforementioned increase in criticized commercial loans was offset by a provision benefit received through a decline in overall delinquency levels. Net charge-offs were $10.6 million during the three months ended March 31, 2018. The allowance for credit losses as a percentage of non-performing loans for the total portfolio decreased from 179% as of December 31, 2017 to 175% as of March 31, 2018, reflecting a slight increase in the level of non-performing loans relative to the increase in the allowance for credit losses during the three-month period.

Following is a summary of supplemental statistical ratios pertaining to our originated loans and leases portfolio. The originated loans and leases portfolio excludes loans acquired at fair value and accounted for in accordance with ASC 805, Business Combinations. Also see Note 5, Loans and Leases, of the Notes to Consolidated Financial Statements (Unaudited).

TABLE 12

	At or For the Three Months Ended
	March 31, 2018		December 31, 2017		March 31, 2017
Non-performing loans / total originated loans and leases	0.58	%	0.57	%	0.77	%
Non-performing loans + OREO / total originated loans and leases + OREO	0.81	%	0.81	%	1.12	%
Allowance for credit losses (originated loans) / total originated loans and leases	1.08	%	1.10	%	1.19	%
Net charge-offs on originated loans and leases (annualized) / total average originated loans and leases	0.29	%	0.35	%	0.25	%

Deposits

As a bank holding company, our primary source of funds is deposits. These deposits are provided by businesses, municipalities and individuals located within the markets served by our Community Banking subsidiary.

Following is a summary of deposits:

TABLE 13

(in thousands)	March 31, 2018		December 31, 2017		$ Change			% Change
Non-interest-bearing demand	$	5,748,568	$	5,720,030	$	28,538		0.5	%
Interest-bearing demand	9,407,111		9,571,038		(163,927		)	(1.7	)
Savings	2,600,151		2,488,178		111,973			4.5
Certificates and other time deposits	4,741,259		4,620,479		120,780			2.6
Total deposits	$	22,497,089	$	22,399,725	$	97,364		0.4	%

Total deposits increased from December 31, 2017, primarily as a result of organic growth in certificates and other time deposits. The growth reflects heightened deposit-gathering efforts focused on attracting new customer relationships through targeted promotional interest rates on 13-month, 19-month and 25-month certificates of deposit, combined with deepening relationships with existing customers through internal lead generation efforts. Relationship-based transaction deposits, which are comprised of demand (non-interest-bearing and interest-bearing) and savings accounts (including money market savings), declined in total over this period due somewhat to seasonal outflows. Generating growth in these deposits remains a key focus for us.

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Capital Resources and Regulatory Matters

The access to, and cost of, funding for new business initiatives, including acquisitions, the ability to engage in expanded business activities, the ability to pay dividends and the level and nature of regulatory oversight depend, in part, on our capital position.

The assessment of capital adequacy depends on a number of factors such as expected organic growth in the balance sheet, asset quality, liquidity, earnings performance, changing competitive conditions and economic forces. We seek to maintain a strong capital base to support our growth and expansion activities, to provide stability to current operations and to promote public confidence.

In accordance with the terms of our merger with Yadkin Financial Corporation, we issued 111,619,622 shares of our common stock on March 11, 2017.

We have an effective shelf registration statement filed with the SEC. Pursuant to this registration statement, we may, from time to time, issue and sell in one or more offerings any combination of common stock, preferred stock, debt securities, depositary shares, warrants, stock purchase contracts or units.

Capital management is a continuous process, with capital plans and stress testing for FNB and FNBPA updated at least annually. These capital plans include assessing the adequacy of expected capital levels assuming various scenarios by projecting capital needs for a forecast period of 2-3 years beyond the current year. From time to time, we issue shares initially acquired by us as treasury stock under our various benefit plans. We may continue to grow through acquisitions, which can potentially impact our capital position. We may issue additional preferred or common stock in order to maintain our well-capitalized status.

FNB and FNBPA are subject to various regulatory capital requirements administered by the federal banking agencies (see discussion under “Enhanced Regulatory Capital Standards”). Quantitative measures established by regulators to ensure capital adequacy require FNB and FNBPA to maintain minimum amounts and ratios of total, tier 1 and common equity tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined) and minimum leverage ratio (as defined). Failure to meet minimum capital requirements could lead to initiation of certain mandatory, and possibly additional discretionary actions, by regulators that, if undertaken, could have a direct material effect on our Consolidated Financial Statements, dividends and future merger and acquisition activity. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, FNB and FNBPA must meet specific capital guidelines that involve quantitative measures of assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. FNB’s and FNBPA’s capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.

As of March 31, 2018, the most recent notification from the federal banking agencies categorized FNB and FNBPA as “well-capitalized” under the regulatory framework for prompt corrective action. There are no conditions or events since the notification which management believes have changed this categorization. Our management believes that, as of March 31, 2018 and December 31, 2017, FNB and FNBPA met all “well-capitalized” requirements to which each of them was subject.

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Following are the capital amounts and related ratios as of March 31, 2018 and December 31, 2017 for FNB and FNBPA:

TABLE 14

	Actual				Well-Capitalized Requirements				Minimum Capital Requirements plus Capital Conservation Buffer
(dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
As of March 31, 2018
F.N.B. Corporation
Total capital	$	2,707,398	11.5	%	$	2,362,790	10.0	%	$	2,333,255	9.9	%
Tier 1 capital	2,219,884		9.4		1,890,232		8.0		1,860,697		7.9
Common equity tier 1	2,113,002		8.9		1,535,813		6.5		1,506,278		6.4
Leverage	2,219,884		7.6		1,462,494		5.0		1,169,995		4.0
Risk-weighted assets	23,627,896
FNBPA
Total capital	2,543,802		10.8	%	2,354,540		10.0	%	2,325,108		9.9	%
Tier 1 capital	2,368,177		10.1		1,883,632		8.0		1,854,200		7.9
Common equity tier 1	2,288,177		9.7		1,530,451		6.5		1,501,019		6.4
Leverage	2,368,177		8.2		1,453,002		5.0		1,162,401		4.0
Risk-weighted assets	23,545,397
As of December 31, 2017
F.N.B. Corporation
Total capital	$	2,666,272	11.4	%	$	2,340,362	10.0	%	$	2,164,835	9.3	%
Tier 1 capital	2,184,571		9.3		1,872,290		8.0		1,696,763		7.3
Common equity tier 1	2,077,689		8.9		1,521,235		6.5		1,345,708		5.8
Leverage	2,184,571		7.6		1,440,797		5.0		1,152,638		4.0
Risk-weighted assets	23,403,622
FNBPA
Total capital	2,504,191		10.7	%	2,332,593		10.0	%	2,157,649		9.3	%
Tier 1 capital	2,332,892		10.0		1,866,075		8.0		1,691,130		7.3
Common equity tier 1	2,252,892		9.7		1,516,186		6.5		1,341,241		5.8
Leverage	2,332,892		8.1		1,432,604		5.0		1,146,084		4.0
Risk-weighted assets	23,325,934

In accordance with Basel III, the implementation of capital requirements is transitional and phases-in from January 1, 2015 through January 1, 2019. The minimum capital requirements plus capital conservation buffer, which are presented for each period above based on the phase-in schedule, represent the minimum requirements needed to avoid limitations on distributions of dividends and certain discretionary bonus payments. Our management believes that FNB and FNBPA will continue to meet all “well-capitalized” requirements after Basel III is completely phased-in.

Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (Dodd-Frank Act)

The Dodd-Frank Act broadly affects the financial services industry by establishing a framework for systemic risk oversight, creating a resolution authority for institutions determined to be systemically important, mandating higher capital and liquidity requirements, requiring banks to pay increased fees to regulatory agencies and containing numerous other provisions aimed at strengthening the sound operation of the financial services sector that significantly change the system of regulatory oversight as described in more detail under Part I, Item 1, “Business - Government Supervision and Regulation” included in our 2017 Annual Report on Form 10-K as filed with the SEC on February 28, 2018. Many aspects of the Dodd-Frank Act are subject to further rulemaking and will take effect over several years, making it difficult to anticipate the overall financial impact to us or across the financial services industry.

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LIQUIDITY

Our goal in liquidity management is to satisfy the cash flow requirements of customers and the operating cash needs of FNB with cost-effective funding. Our Board of Directors has established an Asset/Liability Management Policy in order to guide management in achieving and maintaining earnings performance consistent with long-term goals, while maintaining acceptable levels of interest rate risk, a “well-capitalized” balance sheet and adequate levels of liquidity. Our Board of Directors has also established a Contingency Funding Policy to guide management in addressing stressed liquidity conditions. These policies designate our Asset/Liability Committee as the body responsible for meeting these objectives. The ALCO, which is comprised of members of executive management, reviews liquidity on a continuous basis and approves significant changes in strategies that affect balance sheet or cash flow positions. Liquidity is centrally managed on a daily basis by our Treasury Department.

FNBPA generates liquidity from its normal business operations. Liquidity sources from assets include payments from loans and investments, as well as the ability to securitize, pledge or sell loans, investment securities and other assets. Liquidity sources from liabilities are generated primarily through the banking offices of FNBPA in the form of deposits and customer repurchase agreements. FNB also has access to reliable and cost-effective wholesale sources of liquidity. Short- and long-term funds can be acquired to help fund normal business operations, as well as to serve as contingency funding in the event that we would be faced with a liquidity crisis.

The principal sources of the parent company’s liquidity are its strong existing cash resources plus dividends it receives from its subsidiaries. These dividends may be impacted by the parent’s or its subsidiaries’ capital needs, statutory laws and regulations, corporate policies, contractual restrictions, profitability and other factors. In addition, through one of our subsidiaries, we regularly issue subordinated notes, which are guaranteed by FNB. Cash on hand at the parent has been managed by various strategies over the last few years. These include strong earnings, increasing earnings retention rate and capital actions. The parent’s cash position decreased $3.8 million from $165.7 million at December 31, 2017 to $161.9 million at March 31, 2018, primarily due to one-time payouts related to the YDKN acquisition.

Management believes our cash levels are appropriate given the current environment. Two metrics that are used to gauge the adequacy of the parent company’s cash position are the LCR and MCH. The LCR is defined as the sum of cash on hand plus projected cash inflows over the next 12 months divided by projected cash outflows over the next 12 months. The MCH is defined as the number of months of corporate expenses and dividends that can be covered by the cash on hand and was impacted by the YDKN acquisition.

The LCR and MCH ratios are presented in the following table:

TABLE 15

(dollars in thousands)	March 31, 2018	December 31, 2017	Internal limit
Liquidity coverage ratio	1.8 times	1.8 times	> 1 time
Months of cash on hand	10.1 months	10.2 months	> 12 months

The MCH ratio fell below our internal limit due to the YDKN acquisition in March 2017. As a result of YDKN, our twelve-month projected dividend payout is estimated at $155 million, an increase of approximately $54 million pre-merger. YDKN did not manage to a similar ratio and held only a minimal amount of cash on hand at their holding company. Our ALCO is evaluating several alternatives, each of which would place the MCH ratio back into policy compliance. Management believes that this policy exception will be cured in 2018.

Our liquidity position has been positively impacted by our ability to generate growth in relationship-based accounts. Organic growth in low-cost transaction deposits was complemented by management’s strategy of heightened deposit gathering efforts during the third and fourth quarters of 2017 focused on attracting new customer relationships and deepening relationships with existing customers through internal lead generation efforts.  Total deposits were $22.5 billion at March 31, 2018, an increase of $97.4 million, or 0.4% from December 31, 2017. Growth in time deposits was $120.8 million, or 2.6%. Total non-interest demand deposit accounts grew by $28.5 million, or 0.5%, and savings accounts grew by $112.0 million, or 4.5%. These increases were offset by seasonally lower business demand deposit and interest checking balances.

FNBPA has significant unused wholesale credit availability sources that include the availability to borrow from the FHLB, the FRB, correspondent bank lines, access to brokered deposits and multiple other channels. In addition to credit availability, FNBPA also possesses salable unpledged government and agency securities which could be utilized to meet funding needs. The ALCO Policy minimum guideline level for salable unpledged government and agency securities is 3.0%.

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The following table presents certain information relating to FNBPA’s credit availability and salable unpledged securities:

TABLE 16

(dollars in thousands)	March 31, 2018			December 31, 2017
Unused wholesale credit availability	$	8,227,214		$	8,189,379
Unused wholesale credit availability as a % of FNBPA assets	26.2		%	26.3		%
Salable unpledged government and agency securities	$	2,290,999		$	2,231,812
Salable unpledged government and agency securities as a % of FNBPA assets	7.3		%	7.2		%

Another metric for measuring liquidity risk is the liquidity gap analysis. The following liquidity gap analysis as of March 31, 2018 compares the difference between our cash flows from existing earning assets and interest-bearing liabilities over future time intervals. Management seeks to limit the size of the liquidity gaps so that sources and uses of funds are reasonably matched in the normal course of business. A reasonably matched position lays a better foundation for dealing with additional funding needs during a potential liquidity crisis. The liquidity gap decreased during the three months as the twelve-month cumulative gap to total assets was (7.0)% and (5.8)% as of March 31, 2018 and December 31, 2017, respectively. Management calculates this ratio at least quarterly and it is reviewed monthly by ALCO.

TABLE 17

(dollars in thousands)	Within 1 Month			2-3 Months			4-6 Months			7-12 Months			Total 1 Year
Assets
Loans	$	465,764		$	1,001,045		$	1,245,511		$	2,252,490		$	4,964,810
Investments	167,647			134,319			218,091			499,488			1,019,545
	633,411			1,135,364			1,463,602			2,751,978			5,984,355
Liabilities
Non-maturity deposits	174,473			348,947			523,424			1,046,848			2,093,692
Time deposits	168,590			510,938			670,023			1,596,382			2,945,933
Borrowings	2,889,614			47,775			27,887			200,723			3,165,999
	3,232,677			907,660			1,221,334			2,843,953			8,205,624
Period Gap (Assets - Liabilities)	$	(2,599,266	)	$	227,704		$	242,268		$	(91,975	)	$	(2,221,269	)
Cumulative Gap	$	(2,599,266	)	$	(2,371,562	)	$	(2,129,294	)	$	(2,221,269	)
Cumulative Gap to Total Assets	(8.2		)%	(7.5		)%	(6.7		)%	(7.0		)%

In addition, the ALCO regularly monitors various liquidity ratios and stress scenarios of our liquidity position. The stress scenarios forecast that adequate funding will be available even under severe conditions. Management believes we have sufficient liquidity available to meet our normal operating and contingency funding cash needs.

MARKET RISK

Market risk refers to potential losses arising from changes in interest rates, foreign exchange rates, equity prices and commodity prices. We are primarily exposed to interest rate risk inherent in our lending and deposit-taking activities as a financial intermediary. To succeed in this capacity, we offer an extensive variety of financial products to meet the diverse needs of our customers. These products sometimes contribute to interest rate risk for us when product groups do not complement one another. For example, depositors may want short-term deposits, while borrowers desire long-term loans.

Changes in market interest rates may result in changes in the fair value of our financial instruments, cash flows and net interest income. The ALCO is responsible for market risk management which involves devising policy guidelines, risk measures and limits, and managing the amount of interest rate risk and its effect on net interest income and capital. We use derivative financial instruments for interest rate risk management purposes and not for trading or speculative purposes.

Interest rate risk is comprised of repricing risk, basis risk, yield curve risk and options risk. Repricing risk arises from differences in the cash flow or repricing between asset and liability portfolios. Basis risk arises when asset and liability

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portfolios are related to different market rate indexes, which do not always change by the same amount. Yield curve risk arises when asset and liability portfolios are related to different maturities on a given yield curve; when the yield curve changes shape, the risk position is altered. Options risk arises from “embedded options” within asset and liability products as certain borrowers have the option to prepay their loans when rates fall, while certain depositors can redeem their certificates of deposit early when rates rise.

We use an asset/liability model to measure our interest rate risk. Interest rate risk measures we utilize include earnings simulation, EVE and gap analysis. Gap analysis and EVE are static measures that do not incorporate assumptions regarding future business. Gap analysis, while a helpful diagnostic tool, displays cash flows for only a single rate environment. EVE’s long-term horizon helps identify changes in optionality and longer-term positions. However, EVE’s liquidation perspective does not translate into the earnings-based measures that are the focus of managing and valuing a going concern. Net interest income simulations explicitly measure the exposure to earnings from changes in market rates of interest. In these simulations, our current financial position is combined with assumptions regarding future business to calculate net interest income under various hypothetical rate scenarios. The ALCO reviews earnings simulations over multiple years under various interest rate scenarios on a periodic basis. Reviewing these various measures provides us with a comprehensive view of our interest rate risk profile.

The following repricing gap analysis as of March 31, 2018 compares the difference between the amount of interest-earning assets and interest-bearing liabilities subject to repricing over a period of time. Management utilizes the repricing gap analysis as a diagnostic tool in managing net interest income and EVE risk measures.

TABLE 18

(dollars in thousands)	Within 1 Month			2-3 Months			4-6 Months			7-12 Months			Total 1 Year
Assets
Loans	$	9,265,689		$	855,440		$	862,637		$	1,551,167		$	12,534,933
Investments	167,647			139,319			270,398			508,833			1,086,197
	9,433,336			994,759			1,133,035			2,060,000			13,621,130
Liabilities
Non-maturity deposits	6,134,551			—			—			—			6,134,551
Time deposits	268,562			511,290			668,221			1,591,924			3,039,997
Borrowings	3,382,956			522,775			10,638			166,225			4,082,594
	9,786,069			1,034,065			678,859			1,758,149			13,257,142
Off-balance sheet	(100,000		)	405,000			—			—			305,000
Period Gap (assets – liabilities + off-balance sheet)	$	(452,733	)	$	365,694		$	454,176		$	301,851		$	668,988
Cumulative Gap	$	(452,733	)	$	(87,039	)	$	367,137		$	668,988
Cumulative Gap to Assets	(1.6		)%	(0.3		)%	1.3		%	2.4		%

The twelve-month cumulative repricing gap to total assets was 2.4% and 3.0% as of March 31, 2018 and December 31, 2017, respectively. The positive cumulative gap positions indicate that we have a greater amount of repricing earning assets than repricing interest-bearing liabilities over the subsequent twelve months. If interest rates increase then net interest income will increase and, conversely, if interest rates decrease then net interest income will decrease.

The allocation of non-maturity deposits and customer repurchase agreements to the one-month maturity category above is based on the estimated sensitivity of each product to changes in market rates. For example, if a product’s rate is estimated to increase by 50% as much as the market rates, then 50% of the account balance was placed in this category.

Utilizing net interest income simulations, the following net interest income metrics were calculated using rate shocks which move market rates in an immediate and parallel fashion. The variance percentages represent the change between the net interest income and EVE calculated under the particular rate scenario versus the net interest income and EVE that was calculated assuming market rates as of March 31, 2018. Using a static balance sheet structure, the measures do not reflect all of management's potential counteractions.

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The following table presents an analysis of the potential sensitivity of our net interest income and EVE to changes in interest rates:

TABLE 19

	March 31, 2018		December 31, 2017		ALCO Limits
Net interest income change (12 months):
+ 300 basis points	3.3	%	3.0	%	n/a
+ 200 basis points	2.4	%	2.3	%	(5.0	)%
+ 100 basis points	1.4	%	1.3	%	(5.0	)%
- 100 basis points	(3.4	)%	(3.9	)%	(5.0	)%
Economic value of equity:
+ 300 basis points	(6.4	)%	(5.9	)%	(25.0	)%
+ 200 basis points	(4.0	)%	(3.7	)%	(15.0	)%
+ 100 basis points	(1.5	)%	(1.2	)%	(10.0	)%
- 100 basis points	(1.5	)%	(2.6	)%	(10.0	)%

We also model rate scenarios which move all rates gradually over twelve months (Rate Ramps) and model scenarios that gradually change the shape of the yield curve. Assuming a static balance sheet, a +300 basis point Rate Ramp increases net interest income (12 months) by 2.2% at March 31, 2018 and 2.0% at December 31, 2017.

Our strategy is generally to manage to a neutral interest rate risk position. However, given the current interest rate environment, the interest rate risk position has been managed to a modestly asset-sensitive position. Currently, rising rates are expected to have a modest, positive effect on net interest income versus net interest income if rates remained unchanged.

The ALCO utilizes several tactics to manage our interest rate risk position. As mentioned earlier, the growth in transaction deposits provides funding that is less interest rate-sensitive than short-term time deposits and wholesale borrowings. On the lending side, we regularly sell long-term fixed-rate residential mortgages to the secondary market and have been successful in the origination of consumer and commercial loans with short-term repricing characteristics. Total variable and adjustable-rate loans were 57.1% and 56.6% of total loans as of March 31, 2018 and December 31, 2017, respectively. As of March 31, 2018, 78.8% of these loans, or 45.0% of total loans, are tied to the Prime and one-month LIBOR rates. The investment portfolio is used, in part, to manage our interest rate risk position. Finally, we have made use of interest rate swaps to commercial borrowers (commercial swaps) to manage our interest rate risk position as the commercial swaps effectively increase adjustable-rate loans. As of March 31, 2018, the commercial swaps totaled $2.4 billion of notional principal, with $213.5 million in notional swap principal originated during the first three months of 2018. The success of the aforementioned tactics has resulted in a moderately asset-sensitive position. For additional information regarding interest rate swaps, see Note 9 in this Report.

We desired to remain modestly asset-sensitive during the first three months of 2018. A number of management actions and market occurrences resulted in an increase in the asset sensitivity of our interest rate risk position during the period. The increase was due to management's actions with the timing of funding loan and investment growth, as well as deposit activity. The primary driver increasing asset sensitivity was the strong interest rate swap activity. The swap activity occurred in conjunction with the growth in certain transaction accounts and time deposits referred to earlier.

We recognize that all asset/liability models have some inherent shortcomings. Asset/liability models require certain assumptions to be made, such as prepayment rates on interest-earning assets and repricing impact on non-maturity deposits, which may differ from actual experience. These business assumptions are based upon our experience, business plans, economic and market trends and available industry data. While management believes that its methodology for developing such assumptions is reasonable, there can be no assurance that modeled results will be achieved.

Furthermore, the metrics are based upon the balance sheet structure as of the valuation date and do not reflect the planned growth or management actions that could be taken.

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RISK MANAGEMENT

As a financial institution, we take on a certain amount of risk in every business decision, transaction and activity. Our Board of Directors and senior management have identified seven major categories of risk: credit risk, market risk, liquidity risk, reputational risk, operational risk, legal and compliance risk and strategic risk. In its oversight role of our risk management function, the Board of Directors focuses on the strategies, analyses and conclusions of management relating to identifying, understanding and managing risks so as to optimize total stockholder value, while balancing prudent business and safety and soundness considerations.

The Board of Directors adopted a risk appetite statement that defines acceptable risk levels or risk limits under which the company seeks to operate in order to optimize returns, while managing risk. As such, the board monitors a host of risk metrics from both business and operational units, as well as by risk category, to provide insight into how the company’s performance aligns with our risk appetite. The risk appetite dashboard is reviewed periodically by the Board of Directors and senior management to ensure performance alignment with our risk appetite, and where appropriate, makes adjustments to applicable business strategies and tactics where risks approach our desired risk tolerance limits.

We support our risk management process through a governance structure involving our Board of Directors and senior management. The joint Risk Committee of our Board of Directors and the FNBPA Board of Directors helps ensure that business decisions are executed within appropriate risk tolerances. The Risk Committee has oversight responsibilities with respect to the following:

• identification, measurement, assessment and monitoring of enterprise-wide risk;

• development of appropriate and meaningful risk metrics to use in connection with the oversight of our businesses and strategies;

• review and assessment of our policies and practices to manage our credit, market, liquidity, legal, regulatory and operating risk (including technology, operational, compliance and fiduciary risks); and

• identification and implementation of risk management best practices.

The Risk Committee serves as the primary point of contact between our Board of Directors and the Risk Management Council, which is the senior management level committee responsible for risk management. Risk appetite is an integral element of our business and capital planning processes through our Board Risk Committee and Risk Management Council. We use our risk appetite processes to promote appropriate alignment of risk, capital and performance tactics, while also considering risk capacity and appetite constraints from both financial and non-financial risks. Our top-down risk appetite process serves as a limit for undue risk-taking for bottom-up planning from our various business functions. Our Board Risk Committee, in collaboration with our Risk Management Council, approves our risk appetite on an annual basis, or more frequently, as needed to reflect changes in the risk environment, with the goal of ensuring that our risk appetite remains consistent with our strategic plans and business operations, regulatory environment and our shareholders' expectations. Reports relating to our risk appetite and strategic plans, and our ongoing monitoring thereof, are regularly presented to our various management level risk oversight and planning committees and periodically reported up through our Board Risk Committee.

As noted above, we have a Risk Management Council comprised of senior management. The purpose of this committee is to provide regular oversight of specific areas of risk with respect to the level of risk and risk management structure. Management has also established an Operational Risk Committee that is responsible for identifying, evaluating and monitoring operational risks across FNB, evaluating and approving appropriate remediation efforts to address identified operational risks and providing periodic reports concerning operational risks to the Risk Management Council. The Risk Management Council reports on a regular basis to the Risk Committee of our Board of Directors regarding our enterprise-wide risk profile and other significant risk management issues. Our Chief Risk Officer is responsible for the design and implementation of our enterprise-wide risk management strategy and framework through the Compliance Department and the Information and Cyber Security Department, both of which report to the Chief Risk Officer, and ensures the coordinated and consistent implementation of risk management initiatives and strategies on a day-to-day basis. Our Compliance Department, which reports to the Chief Risk Officer, is responsible for developing policies and procedures and monitoring compliance with applicable laws and regulations. Our Information and Cyber Security Department is responsible for maintaining a risk assessment of our information and cyber security risks and ensuring appropriate controls are in place to manage and control such risks, including designing appropriate testing plans to ensure the integrity of information and cyber security controls. Further, our audit function performs an independent assessment of our internal controls environment and plays an integral role in testing the operation of the internal controls systems and reporting findings to management and our Audit Committee. Both the Risk Committee and Audit Committee of our Board of Directors regularly report on risk-related matters to the full Board of Directors. In addition, both the

71

Risk Committee of our Board of Directors and our Risk Management Council regularly assess our enterprise-wide risk profile and provide guidance on actions needed to address key and emerging risk issues.

The Board of Directors believes that our enterprise-wide risk management process is effective and enables the Board of Directors to:

• assess the quality of the information we receive;

• understand the businesses, investments and financial, accounting, legal, regulatory and strategic considerations and the risks that we face;

• oversee and assess how senior management evaluates risk; and

• assess appropriately the quality of our enterprise-wide risk management process.

RECONCILIATIONS OF NON-GAAP FINANCIAL MEASURES AND KEY PERFORMANCE INDICATORS TO GAAP

Reconciliations of non-GAAP operating measures and key performance indicators discussed in this Report to the most directly comparable GAAP financial measures are included in the following tables.

TABLE 20

Operating Net Income Available to Common Stockholders

	Three Months Ended March 31,
(dollars in thousands)	2018		2017
Net income available to common stockholders	$	84,752	$	20,969
Merger-related expense	—		52,724
Tax benefit of merger-related expense	—		(17,579		)
Merger-related net securities gains	—		(2,609		)
Tax expense of merger-related net securities gains	—		913
Operating net income available to common stockholders (non-GAAP)	$	84,752	$	54,418

The table above shows how operating net income available to common stockholders (non-GAAP) is derived from amounts reported in our financial statements. We believe this measurement helps investors understand the effect of acquisition activity and recent tax reform on reported results. We use operating net income available to common stockholders to better understand business performance and the underlying trends produced by core business activities. We believe merger-related expenses are not organic costs to run our operations and facilities. These charges represent expenses to satisfy contractual obligations of an acquired entity without any useful benefit to us and to convert and consolidate the entity’s records onto our platforms. These costs are specific to each individual transaction, and may vary significantly based on the size and complexity of the transaction.

72

TABLE 21

Operating Earnings per Diluted Common Share

	Three Months Ended March 31,
	2018		2017
Net income per diluted common share	$	0.26	$	0.09
Merger-related expense	—		0.22
Tax benefit of merger-related expense	—		(0.07		)
Merger-related net securities gains	—		(0.01		)
Operating earnings per diluted common share (non-GAAP)	$	0.26	$	0.23

TABLE 22

Return on Average Tangible Common Equity

	Three Months Ended March 31,
(dollars in thousands)	2018			2017
Net income available to common stockholders (annualized)	$	343,716		$	85,042
Amortization of intangibles, net of tax (annualized)	13,513			8,166
Tangible net income available to common stockholders (annualized) (non-GAAP)	$	357,229		$	93,208
Average total stockholders’ equity	$	4,430,269		$	3,007,853
Less: Average preferred stockholders' equity	(106,882		)	(106,882		)
Less: Average intangibles (1)	(2,339,783		)	(1,381,712		)
Average tangible common equity (non-GAAP)	$	1,983,604		$	1,519,259
Return on average tangible common equity (non-GAAP)	18.01		%	6.14		%

(1)Excludes loan servicing rights.

TABLE 23

Return on Average Tangible Assets

	Three Months Ended March 31,
(dollars in thousands)	2018			2017
Net income (annualized)	$	351,867		$	93,191
Amortization of intangibles, net of tax (annualized)	13,513			8,166
Tangible net income (annualized) (non-GAAP)	$	365,380		$	101,357
Average total assets	$	31,494,506		$	24,062,099
Less: Average intangibles (1)	(2,339,783		)	(1,381,712		)
Average tangible assets (non-GAAP)	$	29,154,723		$	22,680,387
Return on average tangible assets (non-GAAP)	1.25		%	0.45		%

 (1)Excludes loan servicing rights.

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TABLE 24

Tangible Book Value per Common Share

	Three Months Ended March 31,
(in thousands, except per share data)	2018			2017
Total stockholders’ equity	$	4,433,453		$	4,355,795
Less: Preferred stockholders’ equity	(106,882		)	(106,882		)
Less: Intangibles (1)	(2,339,139		)	(2,356,800		)
Tangible common equity (non-GAAP)	$	1,987,432		$	1,892,113
Ending common shares outstanding	323,686,993			322,906,763
Tangible book value per common share (non-GAAP)	$	6.14		$	5.86

 (1)Excludes loan servicing rights.

TABLE 25

Tangible equity to tangible assets (period-end)

	Three Months Ended March 31,
(dollars in thousands)	2018			2017
Total stockholders' equity	$	4,433,453		$	4,355,795
Less:  Intangibles(1)	(2,339,139		)	(2,356,800		)
Tangible equity (non-GAAP)	$	2,094,314		$	1,998,995
Total assets	$	31,652,353		$	30,190,695
Less:  Intangibles(1)	(2,339,139		)	(2,356,800		)
Tangible assets (non-GAAP)	$	29,313,214		$	27,833,895
Tangible equity / tangible assets (period-end) (non-GAAP)	7.14		%	7.18		%

(1) Excludes loan servicing rights.

TABLE 26

Tangible common equity / tangible assets (period-end)

	Three Months Ended March 31,
(dollars in thousands)	2018			2017
Total stockholders' equity	$	4,433,453		$	4,355,795
Less:  Preferred stockholders' equity	(106,882		)	(106,882		)
Less:  Intangibles (1)	(2,339,139		)	(2,356,800		)
Tangible common equity (non-GAAP)	$	1,987,432		$	1,892,113
Total assets	$	31,652,353		$	30,190,695
Less:  Intangibles(1)	(2,339,139		)	(2,356,800		)
Tangible assets (non-GAAP)	$	29,313,214		$	27,833,895
Tangible common equity / tangible assets (period-end) (non-GAAP)	6.78		%	6.80		%

 (1) Excludes loan servicing rights.

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TABLE 27

Efficiency Ratio

	Three Months Ended March 31,
(dollars in thousands)	2018			2017
Non-interest expense	$	171,083		$	187,555
Less: Amortization of intangibles	(4,218		)	(3,098		)
Less: OREO expense	(1,367		)	(983		)
Less: Merger-related expense	—			(52,724		)
Adjusted non-interest expense	$	165,498		$	130,750
Net interest income	$	226,105		$	172,752
Taxable equivalent adjustment	3,103			3,522
Non-interest income	67,503			55,116
Less: Net securities gains	—			(2,625		)
Adjusted net interest income (FTE) + non-interest income	$	296,711		$	228,765
Efficiency ratio (FTE) (non-GAAP)	55.78		%	57.15		%

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The information called for by this item is provided in the Market Risk section of "Management’s Discussion and Analysis of Financial Condition and Results of Operations," which is included in Item 2 of this Report, and is incorporated herein by reference. There are no material changes in the information provided under Part II, Item 7A, “Quantitative and Qualitative Disclosures About Market Risk” included in our 2017 Annual Report on Form 10-K as filed with the SEC on February 28, 2018.

ITEM 4. CONTROLS AND PROCEDURES

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES. FNB’s management, with the participation of our principal executive and financial officers, evaluated our disclosure controls and procedures (as defined in Rules 13a–15(e) and 15d–15(e) under the Securities Exchange Act of 1934, as amended) as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on this evaluation, our management, including the Chief Executive Officer (CEO) and the Chief Financial Officer (CFO), concluded that, as of the end of the period covered by this quarterly report, our disclosure controls and procedures were effective as of such date at the reasonable assurance level as discussed below to ensure that information required to be disclosed by us in the reports we file under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

LIMITATIONS ON THE EFFECTIVENESS OF CONTROLS. FNB’s management, including the CEO and the CFO, does not expect that our disclosure controls and internal controls 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. 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 FNB 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. In addition, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the controls.

CHANGES IN INTERNAL CONTROLS. The CEO and the CFO have evaluated the changes to our internal controls over financial reporting that occurred during our fiscal quarter ended March 31, 2018, as required by paragraph (d) of Rules 13a–15 and 15d–15 under the Securities Exchange Act of 1934, as amended, and have concluded that there were no such changes that materially affected, or are reasonably likely to materially affect, our internal controls over financial reporting.

75

PART II - OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

The information required by this Item is set forth in the “Other Legal Proceedings” discussion in Note 9 of the Notes to the Consolidated Financial Statements, which is incorporated herein by reference in response to this Item.

ITEM 1A. RISK FACTORS

For information regarding risk factors that could affect our results of operations, financial condition and liquidity, see the risk factors disclosed in the “Risk Factors” section of our Annual Report on Form 10-K for the year ended December 31, 2017. See also Part I, Item 2 (Management’s Discussion and Analysis) of this Report.

There are no material changes from any of the risk factors previously disclosed in our 2017 Annual Report on Form 10-K as filed with the SEC on February 28, 2018.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

NONE

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

NONE

ITEM 4. MINE SAFETY DISCLOSURES

Not Applicable.

ITEM 5. OTHER INFORMATION

NONE

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ITEM 6.    EXHIBITS

Exhibit Index

Exhibit Number	Description
10.1	F.N.B. Corporation Performance-Based Restricted Stock Unit Award Agreement (Incorporated by reference to Exhibit 10.1 of FNB’s Current Report on Form 8‑K filed on April 6, 2018).
10.2	F.N.B. Corporation Time-Based Restricted Stock Unit Award Agreement (Incorporated by reference to Exhibit 10.2 of FNB’s Current Report on Form 8-K filed on April 6, 2018).
31.1.	Certification of Chief Executive Officer Sarbanes-Oxley Act Section 302. (filed herewith).
31.2.	Certification of Chief Financial Officer Sarbanes-Oxley Act Section 302. (filed herewith).
32.1.	Certification of Chief Executive Officer Sarbanes-Oxley Act Section 906. (furnished herewith).
32.2.	Certification of Chief Financial Officer Sarbanes-Oxley Act Section 906. (furnished herewith).
101	The following materials from F.N.B. Corporation’s Quarterly Report on Form 10-Q for the period ended March 31, 2018, formatted in XBRL: (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Income, (iii) the Consolidated Statements of Comprehensive Income, (iv) the Consolidated Statements of Stockholders’ Equity, (v) the Consolidated Statements of Cash Flows and (vi) the Notes to Consolidated Financial Statements. (filed herewith).

SIGNATURES

Pursuant to the requirements 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.

		F.N.B. Corporation
Dated:	May 10, 2018	/s/ Vincent J. Delie, Jr.
		Vincent J. Delie, Jr.
		Chairman, President and Chief Executive Officer
		(Principal Executive Officer)
Dated:	May 10, 2018	/s/ Vincent J. Calabrese, Jr.
		Vincent J. Calabrese, Jr.
		Chief Financial Officer
		(Principal Financial Officer)
Dated:	May 10, 2018	/s/ James L. Dutey
		James L. Dutey
		Corporate Controller
		(Principal Accounting Officer)

77

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

SARBANES-OXLEY ACT SECTION 302

I, Vincent J. Delie, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 31, 2018 of F.N.B. Corporation;

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 controls over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 10, 2018	/s/ Vincent J. Delie, Jr.
	Vincent J Delie, Jr. Chairman, President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

SARBANES-OXLEY ACT SECTION 302

I, Vincent J. Calabrese Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 31, 2018 of F.N.B. Corporation;

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 controls over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 10, 2018	/s/ Vincent J. Calabrese Jr.
	Vincent J. Calabrese Jr. Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

SARBANES-OXLEY ACT SECTION 906

Pursuant to Section 1350 of Title 18 of the United States Code, I, Vincent J. Delie, Jr., Chairman, President and Chief Executive Officer of F.N.B. Corporation (the “Company”), hereby certify that, to the best of my knowledge:

1. The Company’s Form 10-Q Quarterly Report for the period ended March 31, 2018 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 10, 2018	/s/ Vincent J. Delie, Jr.
	Vincent J Delie, Jr. Chairman, President and Chief Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

SARBANES-OXLEY ACT SECTION 906

Pursuant to Section 1350 of Title 18 of the United States Code, I, Vincent J. Calabrese, Jr., Chief Financial Officer of F.N.B. Corporation (the “Company”), hereby certify that, to the best of my knowledge:

1. The Company’s Form 10-Q Quarterly Report for the period ended March 31, 2018 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 10, 2018	/s/ Vincent J. Calabrese Jr.
	Vincent J. Calabrese Jr. Chief Financial Officer

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Trading Symbol	FNB
Entity Registrant Name	FNB CORP/PA/
Entity Central Index Key	0000037808
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		323,851,407

XML

Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks		$ 325,101	$ 408,718
Interest bearing deposits with banks		61,228	70,725
Cash and Cash Equivalents		386,329	479,443
Securities available for sale		2,927,463	2,764,562
Debt securities held to maturity (fair value of $3,131,964 and $3,218,379)		3,224,000	3,242,268
Loans held for sale (includes $21,610 and $56,458 measured at fair value) (1)	[1]	37,982	92,891
Loans and leases, net of unearned income of $43,791 and $50,680		21,262,397	20,998,766
Allowance for credit losses		(179,247)	(175,380)
Net Loans and Leases		21,083,150	20,823,386
Premises and equipment, net		333,424	336,540
Goodwill		2,251,281	2,249,188
Core deposit and other intangible assets, net		87,858	92,075
Bank owned life insurance		529,843	526,818
Other assets		791,023	810,464
Total Assets		31,652,353	31,417,635
Liabilities
Non-interest-bearing demand		5,748,568	5,720,030
Interest-bearing demand		9,407,111	9,571,038
Savings		2,600,151	2,488,178
Certificates and other time deposits		4,741,259	4,620,479
Total Deposits		22,497,089	22,399,725
Short-term borrowings		3,802,480	3,678,337
Long-term borrowings		659,890	668,173
Other liabilities		259,441	262,206
Total Liabilities		27,218,900	27,008,441
Stockholders’ Equity
Preferred stock - $0.01 par value; liquidation preference of $1,000 per share Authorized - 20,000,000 shares Issued - 110,877 shares		106,882	106,882
Common stock - $0.01 par value Authorized - 500,000,000 shares Issued - 325,319,503 and 325,095,055 shares		3,255	3,253
Additional paid-in capital		4,037,847	4,033,567
Retained earnings		413,340	367,658
Accumulated other comprehensive loss		(108,724)	(83,052)
Treasury stock – 1,632,510 and 1,629,915 shares at cost		(19,147)	(19,114)
Total Stockholders’ Equity		4,433,453	4,409,194
Total Liabilities and Stockholders’ Equity		$ 31,652,353	$ 31,417,635

[1] Amount represents loans for which we have elected the fair value option. See Note 18.

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Securities held to maturity, fair value		$ 3,131,964	$ 3,218,379
Loans held for sale, fair value	[1]	21,610	56,458
Unearned income on loans		$ 43,791	$ 50,680
Preferred stock, par value (in dollars per share)		$ 0.01	$ 0.01
Preferred stock, liquidation preference per share (in dollars per share)		$ 1,000	$ 1,000
Preferred stock, shares authorized		20,000,000	20,000,000
Preferred stock, shares issued		110,877	110,877
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01
Common stock, shares authorized		500,000,000	500,000,000
Common stock, shares issued		325,319,503	325,095,055
Treasury stock, shares		1,632,510	1,629,915

[1] Amount represents loans for which we have elected the fair value option. See Note 18.

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Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest Income
Loans and leases, including fees	$ 239,094	$ 168,629
Securities:
Taxable	26,879	22,466
Tax-exempt	6,594	3,401
Dividends	0	9
Other	360	188
Total Interest Income	272,927	194,693
Interest Expense
Deposits	26,469	11,740
Short-term borrowings	15,207	6,674
Long-term borrowings	5,146	3,527
Total Interest Expense	46,822	21,941
Net Interest Income	226,105	172,752
Provision for credit losses	14,495	10,850
Net Interest Income After Provision for Credit Losses	211,610	161,902
Non-Interest Income
Service charges	30,077	24,581
Trust services	6,448	5,747
Insurance commissions and fees	5,135	5,141
Securities commissions and fees	4,319	3,623
Capital markets income	5,214	3,847
Mortgage banking operations	5,529	3,790
Bank owned life insurance	3,285	2,153
Net securities gains	0	2,625
Other	7,496	3,609
Total Non-Interest Income	67,503	55,116
Non-Interest Expense
Salaries and employee benefits	89,326	73,578
Net occupancy	15,568	11,349
Equipment	14,465	9,630
Amortization of intangibles	4,218	3,098
Outside services	14,725	13,043
FDIC insurance	8,834	5,387
Supplies	1,684	2,196
Bank shares and franchise taxes	3,452	2,980
Merger-related	0	52,724
Other	18,811	13,570
Total Non-Interest Expense	171,083	187,555
Income Before Income Taxes	108,030	29,463
Income taxes	21,268	6,484
Net Income	86,762	22,979
Preferred stock dividends	2,010	2,010
Net Income Available to Common Stockholders	$ 84,752	$ 20,969
Earnings per Common Share
Basic (in USD per share)	$ 0.26	$ 0.09
Diluted (in USD per share)	0.26	0.09
Cash Dividends per Common Share (in USD per share)	$ 0.12	$ 0.12

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 86,762	$ 22,979
Securities available for sale:
Unrealized (losses) gains arising during the period, net of tax (benefit) expense of $(8,467) and $3,248	(29,787)	6,032
Reclassification adjustment for gains included in net income, net of tax expense of $0 and $424	0	(787)
Derivative instruments:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of $1,082 and $(550)	3,804	(1,022)
Reclassification adjustment for gains included in net income, net of tax expense of $49 and $125	(173)	(233)
Pension and postretirement benefit obligations:
Unrealized (losses) gains arising during the period, net of tax (benefit) expense of $136 and $221	484	410
Other comprehensive (loss) income	(25,672)	4,400
Comprehensive income	$ 61,090	$ 27,379

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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Unrealized gains arising during the period, tax expense	$ (8,467)	$ 3,248
Reclassification adjustment for gains included in net income, tax expense	0	424
Unrealized (losses) gains arising during the period, tax (benefit) expense	1,082	(550)
Reclassification adjustment for gains included in net income, tax expense	49	125
Unrealized gains arising during the period, tax expense	$ 136	$ 221

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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance at beginning of period at Dec. 31, 2016	$ 2,571,617	$ 106,882	$ 2,125	$ 2,234,366	$ 304,397	$ (61,369)	$ (14,784)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	27,379				22,979	4,400
Dividends declared:
Preferred stock	(2,010)				(2,010)
Common stock: $0.12/share	(25,548)				(25,548)
Issuance of common stock	(803)		5	2,117			(2,925)
Issuance of common stock - acquisitions	1,782,007		1,116	1,780,891
Restricted stock compensation	1,394			1,394
Tax benefit of stock-based compensation	1,759			1,759
Balance at end of period at Mar. 31, 2017	4,355,795	106,882	3,246	4,020,527	299,818	(56,969)	(17,709)
Balance at beginning of period at Dec. 31, 2017	4,409,194	106,882	3,253	4,033,567	367,658	(83,052)	(19,114)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	61,090				86,762	(25,672)
Dividends declared:
Preferred stock	(2,010)				(2,010)
Common stock: $0.12/share	(39,070)				(39,070)
Issuance of common stock	2,310		2	2,341			(33)
Restricted stock compensation	1,939			1,939
Balance at end of period at Mar. 31, 2018	$ 4,433,453	$ 106,882	$ 3,255	$ 4,037,847	$ 413,340	$ (108,724)	$ (19,147)

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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]
Common stock dividends per share (in USD per share)	$ 0.12	$ 0.12

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Activities
Net income	$ 86,762	$ 22,979
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	23,676	17,276
Provision for credit losses	14,495	10,850
Deferred tax expense	1,864	11,224
Net securities gains	0	(2,625)
Tax benefit of stock-based compensation	(233)	(720)
Loans originated for sale	(208,990)	(182,771)
Loans sold	269,235	135,405
Gain on sale of loans	(5,336)	(3,344)
Net change in:
Interest receivable	(828)	(1,527)
Interest payable	282	444
Bank owned life insurance	(3,093)	(1,962)
Other, net	32,559	13,403
Net cash flows provided by operating activities	210,393	18,632
Investing Activities
Net change in loans and leases	(284,196)	(208,958)
Securities available for sale:
Purchases	(357,784)	(492,227)
Sales	0	549,460
Maturities	153,401	119,867
Debt securities held to maturity:
Purchases	(63,918)	(531,560)
Sales	0	1,574
Maturities	80,492	119,324
Increase in premises and equipment	(9,347)	(23,186)
Net cash received in business combinations	0	197,682
Net cash flows used in investing activities	(481,352)	(268,024)
Financing Activities
Demand (non-interest bearing and interest bearing) and savings accounts	(23,416)	73,291
Time deposits	122,040	11,421
Short-term borrowings	124,143	286,765
Proceeds from issuance of long-term borrowings	10,122	65,998
Repayment of long-term borrowings	(18,213)	(82,506)
Net proceeds from issuance of common stock	4,249	957
Cash dividends paid:
Preferred stock	(2,010)	(2,010)
Common stock	(39,070)	(25,548)
Net cash flows provided by financing activities	177,845	328,368
Net Increase (Decrease) in Cash and Cash Equivalents	(93,114)	78,976
Cash and cash equivalents at beginning of period	479,443	371,407
Cash and Cash Equivalents at End of Period	$ 386,329	$ 450,383

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NATURE OF OPERATIONS

3 Months Ended

Mar. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

NATURE OF OPERATIONS

NATURE OF OPERATIONS

F.N.B. Corporation, headquartered in Pittsburgh, Pennsylvania, is a diversified financial services company operating in eight states. Through FNBPA, we have over 150 years of serving the financial and banking needs of our customers. We hold a significant retail deposit market share in attractive markets including: Pittsburgh, Pennsylvania; Baltimore, Maryland; Cleveland, Ohio; and Charlotte, Raleigh-Durham and the Piedmont Triad (Winston-Salem, Greensboro and High Point) in North Carolina. As of March 31, 2018, we had 417 banking offices throughout Pennsylvania, Ohio, Maryland, West Virginia, North Carolina and South Carolina. We provide a full range of commercial banking, consumer banking and wealth management solutions through our subsidiary network which is led by our largest affiliate, FNBPA. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, business credit, capital markets and lease financing. Consumer banking provides a full line of consumer banking products and services including deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services. Wealth management services include fiduciary and brokerage services, asset management, private banking and insurance. We also operate Regency Finance Company, which had 77 consumer finance offices in Pennsylvania, Ohio, Kentucky and Tennessee as of March 31, 2018.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

Our accompanying Consolidated Financial Statements and these Notes to the Financial Statements include subsidiaries in which we have a controlling financial interest. We own and operate FNBPA, First National Trust Company, First National Investment Services Company, LLC, F.N.B. Investment Advisors, Inc., First National Insurance Agency, LLC, Regency, Bank Capital Services, LLC and F.N.B. Capital Corporation, LLC, and include results for each of these entities in the accompanying Consolidated Financial Statements.

The accompanying Consolidated Financial Statements include all adjustments that are necessary, in the opinion of management, to fairly reflect our financial position and results of operations in accordance with U.S. generally accepted accounting principles. All significant intercompany balances and transactions have been eliminated. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on our net income and stockholders’ equity. Events occurring subsequent to the date of the March 31, 2018 Balance Sheet have been evaluated for potential recognition or disclosure in the Consolidated Financial Statements through the date of the filing of the Consolidated Financial Statements with the Securities and Exchange Commission.

Certain information and Note disclosures normally included in Consolidated Financial Statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. The interim operating results are not necessarily indicative of operating results FNB expects for the full year. These interim unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in FNB’s 2017 Annual Report on Form 10-K filed with the SEC on February 28, 2018. For a detailed description of our significant accounting policies, see Note 1 "Summary of Significant Accounting Policies" in the 2017 Form 10-K. The accounting policies presented below have been added or amended for newly material items or the adoption of new accounting standards.

Use of Estimates

Our accounting and reporting policies conform with GAAP. The preparation of Financial Statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying Notes. Actual results could materially differ from those estimates. Material estimates that are particularly susceptible to significant changes include the allowance for credit losses, accounting for acquired loans, fair value of financial instruments, goodwill and other intangible assets, income taxes and deferred tax assets and litigation.

Revenue from Contracts with Customers

We earn certain revenues from contracts with customers. These revenues are recognized when control of the promised services is transferred to the customers in an amount that reflects the consideration we expect to be entitled to in an exchange for those services.

In determining the appropriate revenue recognition for our contracts with customers, we consider whether the contract has commercial substance and is approved by both parties with identifiable contractual rights, payment terms, and the collectability of consideration is probable. Generally, we satisfy our performance obligations upon the completion of services at the amount to which we have the right to invoice or charge under contracts with an original expected duration of one year or less. We apply this guidance on a portfolio basis to contracts with similar characteristics and for which we believe the results would not differ materially from applying this guidance to individual contracts.

Our services provided under contracts with customers are transferred at the point in time when the services are rendered. Generally, we do not defer incremental direct costs to obtain contracts with customers that would be amortized in one year or less under the practical expedient. These costs are recognized as expense, primarily salary and benefit expense, in the period incurred.

Deposit Services.We recognize revenue on deposit services based on published fees for services provided. Demand and savings deposit customers have the right to cancel their depository arrangements and withdraw their deposited funds at any time without prior notice. When services involve deposited funds that can be retrieved by customers without penalties, we consider the service contract term to be day-to-day, where each day represents the renewal of the contract. The contract does not extend beyond the services performed and revenue is recognized at the end of the contract term (daily) as the performance obligation is satisfied.

No deposit services fees exist for long-term deposit products beyond early withdrawal penalties, which are earned on these products at the time of early termination.

Revenue from deposit services fees are reduced where we have a history of waived or reduced fees by customer request or due to a customer service issue, by historical experience, or another acceptable method in the same period as the related revenues. Revenues from deposit services are reported in the Consolidated Statements of Income as service charges and in the Community Banking segment as non-interest income.

Wealth Management Services.Wealth advisory and trust services are provided on a month-to-month basis and invoiced as services are rendered. Fees are based on a fixed amount or a scale based on the level of services provided or assets under management. The customer has the right to terminate their services agreement at any time. We determine the value of services performed based on the fee schedule in effect at the time the services are performed. Revenues from wealth advisory and trust services are reported in the Consolidated Statements of Income as trust services and securities commissions and fees, and in the Wealth segment as non-interest income.

Insurance Services.Insurance services include full-service insurance brokerage services offering numerous lines of commercial and personal insurance through major carriers to businesses and individuals within our geographic markets. We recognize revenue on insurance contracts in effect based on contractually specified commission payments on premiums that are paid by the customer to the insurance carrier. Contracts are cancellable at any time and we have no performance obligation to the customers beyond the time the insurance is placed into effect. Revenues from insurance services are reported in the Consolidated Statements of Income as insurance commissions and fees, and in the Insurance segment as non-interest income.

Debt Securities

Debt securities comprise a significant portion of our Consolidated Balance Sheets. Such securities can be classified as trading, HTM or AFS. As of March 31, 2018 and 2017, we did not hold any trading debt securities.

Debt securities HTM are the securities that management has the positive intent and ability to hold until their maturity. Such securities are carried at cost, adjusted for related amortization of premiums and accretion of discounts through interest income from securities, and subject to evaluation for OTTI.

Debt securities that are not classified as trading or HTM are classified as AFS. Such securities are carried at fair value with net unrealized gains and losses deemed to be temporary and OTTI attributable to non-credit factors reported separately as a component of other comprehensive income, net of tax.

We evaluate our debt securities in a loss position for OTTI on a quarterly basis at the individual security level based on our intent to sell. If we intend to sell the debt security or it is more likely than not we will be required to sell the security before recovery of its amortized cost basis, OTTI must be recognized in earnings equal to the entire difference between the investments’ amortized cost basis and its fair value. If we do not intend to sell the debt security and it is not more likely than not that we will be required to sell the security before recovery of its amortized cost basis, OTTI must be separated into the amount representing credit loss and the amount related to all other market factors. The amount related to credit loss will be recognized in earnings. The amount related to other market factors will be recognized in other comprehensive income, net of applicable taxes.

We perform our OTTI evaluation process in a consistent and systematic manner and include an evaluation of all available evidence. This process considers factors such as length of time and anticipated recovery period of the impairment, recent events specific to the issuer and recent experience regarding principal and interest payments.

Low Income Housing Tax Credit (LIHTC) Partnerships

We invest in various affordable housing projects that qualify for LIHTCs. The net investments are recorded in other assets on the Consolidated Balance Sheets. These investments generate a return through the realization of federal tax credits. We use the proportional amortization method to account for a majority of our investments in these entities. LIHTCs that do not meet the requirements of the proportional amortization method are recognized using the equity method. Our net investment in LIHTCs was $26.1 million and $20.9 million at March 31, 2018 and December 31, 2017, respectively. Our unfunded commitments in LIHTCs were $60.1 million and $67.2 million at March 31, 2018 and December 31, 2017, respectively.

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NEW ACCOUNTING STANDARDS

3 Months Ended

Mar. 31, 2018

Accounting Changes and Error Corrections [Abstract]

NEW ACCOUNTING STANDARDS

NEW ACCOUNTING STANDARDS

The following table summarizes accounting pronouncements issued by the Financial Accounting Standards Board that we recently adopted or will be adopting in the future.

Standard	Description	Required Date of Adoption	Financial Statements Impact
Derivative and Hedging Activities
ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities	This Update improves the financial reporting of hedging to better align with a company’s risk management activities. In addition, this Update makes certain targeted improvements to simplify the application of the current hedge accounting guidance.	January 1, 2019 Early adoption is permitted.	This Update is to be applied using a modified retrospective method. The presentation and disclosure guidance are applied prospectively. We are currently assessing the potential impact to our Consolidated Financial Statements.
Securities
ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities	This Update shortens the amortization period for the premium on certain purchased callable securities to the earliest call date. The accounting for purchased callable debt securities held at a discount does not change.	January 1, 2019 Early adoption is permitted.	This Update is to be applied using a modified retrospective transition method. The adoption of this Update is not expected to have a material effect on our Consolidated Financial Statements.

Standard	Description	Required Date of Adoption	Financial Statements Impact
Retirement Benefits
ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	This Update requires that an employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allows only the service cost component of net benefit cost to be eligible for capitalization.	January 1, 2018	We adopted this Update in the first quarter of 2018 by a retrospective transition method. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.
Statement of Cash Flows
ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force)	This Update adds or clarifies guidance on eight cash flow issues.	January 1, 2018	We adopted this Update in the first quarter of 2018 by retrospective application. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.
Credit Losses
ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This Update replaces the current incurred loss impairment methodology with a methodology that reflects current expected credit losses (commonly referred to as CECL) for most financial assets measured at amortized cost and certain other instruments, including loans, HTM debt securities, net investments in leases and off-balance sheet credit exposures. CECL requires loss estimates for the remaining life of the financial asset at the time the asset is originated or acquired, considering historical experience, current conditions and reasonable and supportable forecasts. In addition, the Update will require the use of a modified AFS debt security impairment model and eliminate the current accounting for purchased credit impaired loans and debt securities.	January 1, 2020 Early adoption is permitted for fiscal years beginning after December 15, 2018	This Update is to be applied using a cumulative-effect adjustment to retained earnings. The CECL model is a significant change from existing GAAP and may result in a material change to our accounting for financial instruments. We are reviewing our business processes, information systems and controls to support recognition and disclosures under this Update. This review includes an assessment of our existing credit models and the financial statement disclosure requirements. The impact of this Update will be dependent on the portfolio composition, credit quality and economic conditions at the time of adoption.
Extinguishments of Liabilities
ASU 2016-04, Liabilities - Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products (a consensus of the Emerging Issues Task Force)	This Update requires entities that sell prepaid stored-value products redeemable for goods, services or cash at third-party merchants to recognize breakage.	January 1, 2018	We adopted this Update in the first quarter of 2018. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.

Standard	Description	Required Date of Adoption	Financial Statements Impact
Leases
ASU 2016-02, Leases (Topic 842)	This Updaterequires lessees to put most leases on their balance sheets but recognize expenses in the income statement similar to current accounting. In addition, the Update changes the guidance for sale-leaseback transactions, initial direct costs and lease executory costs for most entities. All entities will classify leases to determine how to recognize lease related revenue and expense.	January 1, 2019 Early adoption is permitted.	This Update is to be applied using a modified retrospective application including a number of optional practical expedients. We are in the process of reviewing our existing lease portfolios, implementing a software solution and assessing the potential impact to our Consolidated Financial Statements.
Financial Instruments – Recognition and Measurement
ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities	This Update amends the presentation and accounting for certain financial instruments, including liabilities measured at fair value under the FVO, and equity investments. The guidance also updates fair value presentation and disclosure requirements for financial instruments measured at amortized cost.	January 1, 2018	We adopted this Update in the first quarter of 2018 by a cumulative-effect adjustment. The adoption of this Update did not have a material effect on our Consolidated Financial Statements. During the first quarter of 2018, we transferred marketable equity securities totaling $1.1 million from securities AFS to other assets.
Revenue Recognition
ASU 2014-09, Revenue from Contracts with Customers (Topic 606)	This Update modifies the guidance used to recognize revenue from contracts with customers for transfers of goods and services and transfers of nonfinancial assets, unless those contracts are within the scope of other guidance. The guidance also requires new qualitative and quantitative disclosures about contract balances and performance obligations.	January 1, 2018	We adopted this Update in the first quarter of 2018 under the modified retrospective method. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.

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MERGERS AND ACQUISITIONS

3 Months Ended

Mar. 31, 2018

Business Combinations [Abstract]

MERGERS AND ACQUISITIONS

MERGERS AND ACQUISITIONS

Yadkin Financial Corporation

On March 11, 2017, we completed our acquisition of YDKN, a bank holding company based in Raleigh, North Carolina. YDKN’s banking affiliate, Yadkin Bank, was merged into FNBPA on March 11, 2017. YDKN’s results of operations have been included in our Consolidated Statements of Income since that date. The acquisition enabled us to enter several North Carolina markets, including Raleigh, Charlotte and the Piedmont Triad, which is comprised of Winston-Salem, Greensboro and High Point. We also completed the core systems conversion activities during the first quarter of 2017.

On the acquisition date, the fair values of YDKN included $6.8 billion in assets, of which there was $5.1 billion in loans, and $5.2 billion in deposits. The acquisition was valued at $1.8 billion based on the acquisition date FNB common stock closing price of $15.97 and resulted in FNB issuing 111,619,622 shares of our common stock in exchange for 51,677,565 shares of YDKN common stock. Under the terms of the merger agreement, shareholders of YDKN received 2.16 shares of FNB common stock for each share of YDKN common stock and cash in lieu of fractional shares. YDKN’s fully vested and outstanding stock options were converted into options to purchase and receive FNB common stock. In conjunction with the acquisition, we assumed a warrant that was issued by YDKN to the UST under the Capital Purchase Program. Based on the exchange ratio, this warrant, which expires in 2019, was converted into a warrant to purchase up to 207,320 shares of FNB common stock with an exercise price of $9.63.

The acquisition of YDKN constituted a business combination and has been accounted for using the acquisition method of accounting, and accordingly, assets acquired, liabilities assumed and consideration exchanged were recorded at estimated fair value on the acquisition date. The determination of estimated fair values required management to make certain estimates about discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and may require adjustments, which can be updated for up to a year following the acquisition. As of March 31, 2018, all fair values and related adjustments to goodwill have been recorded.

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SECURITIES

3 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

SECURITIES

SECURITIES

The amortized cost and fair value of securities are as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair  Value
Securities Available for Sale:
March 31, 2018
U.S. government-sponsored entities	$	364,600	$	—	$	(5,952	)	$	358,648
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,713,036		458		(41,921		)	1,671,573
Agency collateralized mortgage obligations	860,902		28		(28,580		)	832,350
Non-agency collateralized mortgage obligations	1		—		—			1
Commercial mortgage-backed securities	39,183		30		—			39,213
States of the U.S. and political subdivisions	21,138		3		(118		)	21,023
Other debt securities	4,916		—		(261		)	4,655
Total debt securities available for sale	$	3,003,776	$	519	$	(76,832	)	$	2,927,463
December 31, 2017
U.S. government-sponsored entities	$	347,767	$	52	$	(3,877	)	$	343,942
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,615,168		1,225		(17,519		)	1,598,874
Agency collateralized mortgage obligations	813,034		—		(18,077		)	794,957
Non-agency collateralized mortgage obligations	1		—		—			1
States of the U.S. and political subdivisions	21,151		6		(64		)	21,093
Other debt securities	4,913		—		(243		)	4,670
Total debt securities	2,802,034		1,283		(39,780		)	2,763,537
Equity securities	587		438		—			1,025
Total securities available for sale	$	2,802,621	$	1,721	$	(39,780	)	$	2,764,562

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair  Value
Debt Securities Held to Maturity:
March 31, 2018
U.S. Treasury	$	500	$	114	$	—		$	614
U.S. government-sponsored entities	247,272		81		(5,716		)	241,637
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,174,426		491		(27,472		)	1,147,445
Agency collateralized mortgage obligations	783,151		257		(29,971		)	753,437
Commercial mortgage-backed securities	79,476		32		(1,245		)	78,263
States of the U.S. and political subdivisions	939,175		2,483		(31,090		)	910,568
Total debt securities held to maturity	$	3,224,000	$	3,458	$	(95,494	)	$	3,131,964
December 31, 2017
U.S. Treasury	$	500	$	134	$	—		$	634
U.S. government-sponsored entities	247,310		93		(4,388		)	243,015
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,219,802		3,475		(9,058		)	1,214,219
Agency collateralized mortgage obligations	777,146		32		(20,095		)	757,083
Commercial mortgage-backed securities	80,786		414		(575		)	80,625
States of the U.S. and political subdivisions	916,724		13,209		(7,130		)	922,803
Total debt securities held to maturity	$	3,242,268	$	17,357	$	(41,246	)	$	3,218,379

Gross gains and gross losses were realized on securities as follows:

	Three Months Ended March 31,
(in thousands)	2018		2017
Gross gains	$	—	$	3,400
Gross losses	—		(775		)
Net gains	$	—	$	2,625

As of March 31, 2018, the amortized cost and fair value of debt securities, by contractual maturities, were as follows:

	Available for Sale				Held to Maturity
(in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	65,814	$	65,498	$	45,461	$	45,221
Due from one to five years	262,236		256,811		210,014		204,580
Due from five to ten years	7,876		7,725		94,022		93,225
Due after ten years	54,728		54,292		837,450		809,793
	390,654		384,326		1,186,947		1,152,819
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,713,036		1,671,573		1,174,426		1,147,445
Agency collateralized mortgage obligations	860,902		832,350		783,151		753,437
Non-agency collateralized mortgage obligations	1		1		—		—
Commercial mortgage-backed securities	39,183		39,213		79,476		78,263
Total debt securities	$	3,003,776	$	2,927,463	$	3,224,000	$	3,131,964

Maturities may differ from contractual terms because borrowers may have the right to call or prepay obligations with or without penalties. Periodic payments are received on residential mortgage-backed securities based on the payment patterns of the underlying collateral.

Following is information relating to securities pledged:

(dollars in thousands)	March 31, 2018			December 31, 2017
Securities pledged (carrying value):
To secure public deposits, trust deposits and for other purposes as required by law	$	3,532,023		$	3,491,634
As collateral for short-term borrowings	298,233			263,756
Securities pledged as a percent of total securities	62.3		%	62.5		%

Following are summaries of the fair values and unrealized losses of temporarily impaired debt securities, segregated by length of impairment:

	Less than 12 Months						12 Months or More						Total
(dollars in thousands)	#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses
Debt Securities Available for Sale
March 31, 2018
U.S. government-sponsored entities	8	$	158,212	$	(1,389	)	10	$	200,436	$	(4,563	)	18	$	358,648	$	(5,952	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	59	1,212,767		(25,545		)	28	444,583		(16,376		)	87	1,657,350		(41,921		)
Agency collateralized mortgage obligations	16	470,878		(13,274		)	33	312,687		(15,306		)	49	783,565		(28,580		)
States of the U.S. and political subdivisions	7	11,434		(108		)	1	877		(10		)	8	12,311		(118		)
Other debt securities	—	—		—			3	4,655		(261		)	3	4,655		(261		)
Total temporarily impaired debt securities AFS	90	$	1,853,291	$	(40,316	)	75	$	963,238	$	(36,516	)	165	$	2,816,529	$	(76,832	)
December 31, 2017
U.S. government-sponsored entities	7	$	106,809	$	(363	)	10	$	201,485	$	(3,514	)	17	$	308,294	$	(3,877	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	43	976,738		(7,723		)	28	473,625		(9,796		)	71	1,450,363		(17,519		)
Agency collateralized mortgage obligations	14	409,005		(6,231		)	33	335,452		(11,846		)	47	744,457		(18,077		)
States of the U.S. and political subdivisions	7	11,254		(55		)	1	879		(9		)	8	12,133		(64		)
Other debt securities	—	—		—			3	4,670		(243		)	3	4,670		(243		)
Total temporarily impaired debt securities AFS	71	$	1,503,806	$	(14,372	)	75	$	1,016,111	$	(25,408	)	146	$	2,519,917	$	(39,780	)

	Less than 12 Months						12 Months or More						Total
(dollars in thousands)	#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses
Debt Securities Held to Maturity
March 31, 2018
U.S. government-sponsored entities	4	$	54,558	$	(465	)	10	$	184,750	$	(5,251	)	14	$	239,308	$	(5,716	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	73	935,246		(20,410		)	11	173,759		(7,062		)	84	1,109,005		(27,472		)
Agency collateralized mortgage obligations	16	267,299		(5,862		)	35	444,572		(24,109		)	51	711,871		(29,971		)
Commercial mortgage-backed securities	6	48,737		(637		)	3	19,909		(608		)	9	68,646		(1,245		)
States of the U.S. and political subdivisions	148	517,101		(16,245		)	37	112,879		(14,845		)	185	629,980		(31,090		)
Total temporarily impaired debt securities HTM	247	$	1,822,941	$	(43,619	)	96	$	935,869	$	(51,875	)	343	$	2,758,810	$	(95,494	)
December 31, 2017
U.S. government-sponsored entities	4	$	54,790	$	(239	)	10	$	185,851	$	(4,149	)	14	$	240,641	$	(4,388	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	36	648,485		(4,855		)	11	183,989		(4,203		)	47	832,474		(9,058		)
Agency collateralized mortgage obligations	14	275,290		(1,701		)	35	473,257		(18,394		)	49	748,547		(20,095		)
Commercial mortgage-backed securities	3	26,399		(123		)	2	19,443		(452		)	5	45,842		(575		)
States of the U.S. and political subdivisions	16	56,739		(933		)	37	121,536		(6,197		)	53	178,275		(7,130		)
Total temporarily impaired debt securities HTM	73	$	1,061,703	$	(7,851	)	95	$	984,076	$	(33,395	)	168	$	2,045,779	$	(41,246	)

We do not intend to sell the debt securities and it is not more likely than not that we will be required to sell the securities before recovery of their amortized cost basis.

Other-Than-Temporary Impairment

We evaluate our investment securities portfolio for OTTI on a quarterly basis. Impairment is assessed at the individual security level. We consider an investment security impaired if the fair value of the security is less than its cost or amortized cost basis. We did not recognize any OTTI losses on securities for the three months ended March 31, 2018 or 2017.

States of the U.S. and Political Subdivisions

Our municipal bond portfolio with a carrying amount of $960.2 million as of March 31, 2018 is highly rated with an average entity-specific rating of AA and 100% of the portfolio rated A or better. All of the securities in the municipal portfolio except one are general obligation bonds. Geographically, municipal bonds support our primary footprint as 65% of the securities are from municipalities located throughout Pennsylvania, Ohio, Maryland, North Carolina and South Carolina. The average holding size of the securities in the municipal bond portfolio is $3.0 million. In addition to the strong stand-alone ratings, 62% of the municipalities have some formal credit enhancement insurance that strengthens the creditworthiness of their issue. Management reviews the credit profile of each issuer on a quarterly basis.

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LOANS AND LEASES

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

LOANS AND LEASES

LOANS AND LEASES

Following is a summary of loans and leases, net of unearned income:

(in thousands)	Originated Loans and Leases		Acquired Loans		Total Loans and Leases
March 31, 2018
Commercial real estate	$	5,465,150	$	3,346,325	$	8,811,475
Commercial and industrial	3,688,120		591,849		4,279,969
Commercial leases	279,582		—		279,582
Other	39,347		—		39,347
Total commercial loans and leases	9,472,199		3,938,174		13,410,373
Direct installment	1,737,242		134,397		1,871,639
Residential mortgages	2,131,338		630,763		2,762,101
Indirect installment	1,524,330		171		1,524,501
Consumer lines of credit	1,135,488		558,295		1,693,783
Total consumer loans	6,528,398		1,323,626		7,852,024
Total loans and leases, net of unearned income	$	16,000,597	$	5,261,800	$	21,262,397
December 31, 2017
Commercial real estate	$	5,174,783	$	3,567,081	$	8,741,864
Commercial and industrial	3,495,247		675,420		4,170,667
Commercial leases	266,720		—		266,720
Other	17,063		—		17,063
Total commercial loans and leases	8,953,813		4,242,501		13,196,314
Direct installment	1,755,713		149,822		1,905,535
Residential mortgages	2,036,226		666,465		2,702,691
Indirect installment	1,448,268		165		1,448,433
Consumer lines of credit	1,151,470		594,323		1,745,793
Total consumer loans	6,391,677		1,410,775		7,802,452
Total loans and leases, net of unearned income	$	15,345,490	$	5,653,276	$	20,998,766

The loans and leases portfolio categories are comprised of the following:

• Commercial real estate includes both owner-occupied and non-owner-occupied loans secured by commercial properties;

• Commercial and industrial includes loans to businesses that are not secured by real estate;

• Commercial leases consist of leases for new or used equipment;

• Other is comprised primarily of credit cards and mezzanine loans;

• Direct installment is comprised of fixed-rate, closed-end consumer loans for personal, family or household use, such as home equity loans and automobile loans;

• Residential mortgages consist of conventional and jumbo mortgage loans for 1-4 family properties;

• Indirect installment is comprised of loans originated by approved third parties and underwritten by us, primarily automobile loans; and

• Consumer lines of credit include home equity lines of credit and consumer lines of credit that are either unsecured or secured by collateral other than home equity.

The loans and leases portfolio consists principally of loans to individuals and small- and medium-sized businesses within our primary market areas of Pennsylvania, eastern Ohio, Maryland, North Carolina, South Carolina and northern West Virginia.

The following table shows certain information relating to commercial real estate loans:

(dollars in thousands)	March 31, 2018			December 31, 2017
Commercial construction, acquisition and development loans	$	1,167,699		$	1,170,175
Percent of total loans and leases	5.5		%	5.6		%
Commercial real estate:
Percent owner-occupied	35.2		%	35.3		%
Percent non-owner-occupied	64.8		%	64.7		%

Acquired Loans

All acquired loans were initially recorded at fair value at the acquisition date. Refer to the Acquired Loans section in Note 1 of our 2017 Annual Report on Form 10-K for a discussion of ASC 310-20 and ASC 310-30 loans. The outstanding balance and the carrying amount of acquired loans included in the Consolidated Balance Sheets are as follows:

(in thousands)	March 31, 2018		December 31, 2017
Accounted for under ASC 310-30:
Outstanding balance	$	4,853,516	$	5,176,015
Carrying amount	4,521,926		4,834,256
Accounted for under ASC 310-20:
Outstanding balance	754,251		835,130
Carrying amount	733,037		812,322
Total acquired loans:
Outstanding balance	5,607,767		6,011,145
Carrying amount	5,254,963		5,646,578

The outstanding balance is the undiscounted sum of all amounts owed under the loan, including amounts deemed principal, interest, fees, penalties and other, whether or not currently due and whether or not any such amounts have been written or charged-off.

The carrying amount of purchased credit impaired loans included in the table above totaled $1.7 million at March 31, 2018 and $1.9 million at December 31, 2017, representing 0.03% of the carrying amount of total acquired loans as of each date.

The following table provides changes in accretable yield for all acquired loans accounted for under ASC 310-30. Loans accounted for under ASC 310-20 are not included in this table.

	Three Months Ended March 31,
(in thousands)	2018			2017
Balance at beginning of period	$	708,481		$	467,070
Acquisitions	—			443,261
Reduction due to unexpected early payoffs	(25,833		)	(20,560		)
Reclass from non-accretable difference	64,216			23,106
Disposals/transfers	(57		)	(36		)
Other	(403		)	—
Accretion	(59,079		)	(25,241		)
Balance at end of period	$	687,325		$	887,600

Cash flows expected to be collected on acquired loans are estimated quarterly by incorporating several key assumptions similar to the initial estimate of fair value. These key assumptions include probability of default and the amount of actual prepayments after the acquisition date. Prepayments affect the estimated life of the loans and could change the amount of interest income, and possibly principal expected to be collected. In reforecasting future estimated cash flows, credit loss expectations are adjusted as necessary. Improved cash flow expectations for loans or pools are recorded first as a reversal of previously recorded impairment, if any, and then as an increase in prospective yield when all previously recorded impairment has been recaptured. Decreases in expected cash flows are recognized as impairment through a charge to the provision for credit losses and credit to the allowance for credit losses.

During the three months ended March 31, 2018, there was an overall improvement in cash flow expectations which resulted in a net reclassification of $64.2 million from the non-accretable difference to accretable yield. This reclassification was $23.1 million for the three months ended March 31, 2017. The reclassification from the non-accretable difference to the accretable yield results in prospective yield adjustments on the loan pools.

Credit Quality

Management monitors the credit quality of our loan portfolio using several performance measures to do so based on payment activity and borrower performance.

Non-performing loans include non-accrual loans and non-performing TDRs. Past due loans are reviewed on a monthly basis to identify loans for non-accrual status. We place originated loans on non-accrual status and discontinue interest accruals on originated loans generally when principal or interest is due and has remained unpaid for a certain number of days or when the full amount of principal and interest is due and has remained unpaid for a certain number of days, unless the loan is both well secured and in the process of collection. Commercial loans and leases are placed on non-accrual at 90 days, installment loans are placed on non-accrual at 120 days and residential mortgages and consumer lines of credit are generally placed on non-accrual at 180 days, though we may place a loan on non-accrual prior to these past due thresholds as warranted. When a loan is placed on non-accrual status, all unpaid accrued interest is reversed. Non-accrual loans may not be restored to accrual status until all delinquent principal and interest have been paid and the ultimate ability to collect the remaining principal and interest is reasonably assured. The majority of TDRs are loans in which we have granted a concession on the interest rate or the original repayment terms due to the borrower’s financial distress.

Following is a summary of non-performing assets:

(dollars in thousands)	March 31, 2018			December 31, 2017
Non-accrual loans	$	77,684		$	74,635
Troubled debt restructurings	24,452			23,481
Total non-performing loans	102,136			98,116
Other real estate owned	40,980			40,606
Total non-performing assets	$	143,116		$	138,722
Asset quality ratios:
Non-performing loans / total loans and leases	0.48		%	0.47		%
Non-performing loans + OREO / total loans and leases + OREO	0.67		%	0.66		%
Non-performing assets / total assets	0.45		%	0.44		%

The carrying value of residential other real estate owned held as a result of obtaining physical possession upon completion of a foreclosure or through completion of a deed in lieu of foreclosure amounted to $4.8 million at March 31, 2018 and $3.6 million at December 31, 2017. The recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process at March 31, 2018 and December 31, 2017 totaled $13.8 million and $15.2 million, respectively.

The following tables provide an analysis of the aging of loans by class segregated by loans and leases originated and loans acquired:

(in thousands)	30-89 Days Past Due		>90 Days Past Due and Still Accruing		Non- Accrual		Total Past Due		Current		Total Loans and Leases
Originated Loans and Leases
March 31, 2018
Commercial real estate	$	8,345	$	1	$	27,349	$	35,695	$	5,429,455	$	5,465,150
Commercial and industrial	6,793		3		19,705		26,501		3,661,619		3,688,120
Commercial leases	692		—		1,399		2,091		277,491		279,582
Other	183		73		1,000		1,256		38,091		39,347
Total commercial loans and leases	16,013		77		49,453		65,543		9,406,656		9,472,199
Direct installment	8,129		3,913		8,411		20,453		1,716,789		1,737,242
Residential mortgages	14,870		1,982		5,254		22,106		2,109,232		2,131,338
Indirect installment	6,850		511		2,234		9,595		1,514,735		1,524,330
Consumer lines of credit	4,550		821		2,769		8,140		1,127,348		1,135,488
Total consumer loans	34,399		7,227		18,668		60,294		6,468,104		6,528,398
Total originated loans and leases	$	50,412	$	7,304	$	68,121	$	125,837	$	15,874,760	$	16,000,597
December 31, 2017
Commercial real estate	$	8,273	$	1	$	24,773	$	33,047	$	5,141,736	$	5,174,783
Commercial and industrial	8,948		3		17,077		26,028		3,469,219		3,495,247
Commercial leases	1,382		41		1,574		2,997		263,723		266,720
Other	83		153		1,000		1,236		15,827		17,063
Total commercial loans and leases	18,686		198		44,424		63,308		8,890,505		8,953,813
Direct installment	13,192		4,466		8,896		26,554		1,729,159		1,755,713
Residential mortgages	14,096		2,832		5,771		22,699		2,013,527		2,036,226
Indirect installment	10,313		611		2,240		13,164		1,435,104		1,448,268
Consumer lines of credit	5,859		1,014		2,313		9,186		1,142,284		1,151,470
Total consumer loans	43,460		8,923		19,220		71,603		6,320,074		6,391,677
Total originated loans and leases	$	62,146	$	9,121	$	63,644	$	134,911	$	15,210,579	$	15,345,490

(in thousands)	30-89 Days Past Due		>90 Days Past Due and Still Accruing		Non- Accrual		Total Past Due (1) (2)		Current		(Discount) Premium			Total Loans
Acquired Loans
March 31, 2018
Commercial real estate	$	32,697	$	64,550	$	3,735	$	100,982	$	3,433,231	$	(187,888	)	$	3,346,325
Commercial and industrial	5,135		4,617		4,652		14,404		612,354		(34,909		)	591,849
Total commercial loans	37,832		69,167		8,387		115,386		4,045,585		(222,797		)	3,938,174
Direct installment	2,826		1,746		—		4,572		128,754		1,071			134,397
Residential mortgages	15,113		13,059		—		28,172		642,966		(40,375		)	630,763
Indirect installment	—		1		—		1		7		163			171
Consumer lines of credit	5,357		2,139		1,176		8,672		561,906		(12,283		)	558,295
Total consumer loans	23,296		16,945		1,176		41,417		1,333,633		(51,424		)	1,323,626
Total acquired loans	$	61,128	$	86,112	$	9,563	$	156,803	$	5,379,218	$	(274,221	)	$	5,261,800
December 31, 2017
Commercial real estate	$	34,928	$	63,092	$	3,975	$	101,995	$	3,657,152	$	(192,066	)	$	3,567,081
Commercial and industrial	3,187		6,452		5,663		15,302		698,265		(38,147		)	675,420
Total commercial loans	38,115		69,544		9,638		117,297		4,355,417		(230,213		)	4,242,501
Direct installment	5,267		2,013		—		7,280		141,386		1,156			149,822
Residential mortgages	17,191		15,139		—		32,330		675,499		(41,364		)	666,465
Indirect installment	—		1		—		1		10		154			165
Consumer lines of credit	6,353		3,253		1,353		10,959		596,298		(12,934		)	594,323
Total consumer loans	28,811		20,406		1,353		50,570		1,413,193		(52,988		)	1,410,775
Total acquired loans	$	66,926	$	89,950	$	10,991	$	167,867	$	5,768,610	$	(283,201	)	$	5,653,276

(1) Past due information for acquired loans is based on the contractual balance outstanding at March 31, 2018 and December 31, 2017.

(2) Acquired loans are considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if we can reasonably estimate the timing and amount of expected cash flows on such loans. In these instances, we do not consider acquired contractually delinquent loans to be non-accrual or non-performing and continue to recognize interest income on these loans using the accretion method. Acquired loans are considered non-accrual or non-performing when, due to credit deterioration or other factors, we determine we are no longer able to reasonably estimate the timing and amount of expected cash flows on such loans. We do not recognize interest income on acquired loans considered non-accrual or non-performing.

We utilize the following categories to monitor credit quality within our commercial loan and lease portfolio:

Rating Category	Definition
Pass	in general, the condition of the borrower and the performance of the loan is satisfactory or better
Special Mention	in general, the condition of the borrower has deteriorated, requiring an increased level of monitoring
Substandard	in general, the condition of the borrower has significantly deteriorated and the performance of the loan could further deteriorate if deficiencies are not corrected
Doubtful	in general, the condition of the borrower has significantly deteriorated and the collection in full of both principal and interest is highly questionable or improbable

The use of these internally assigned credit quality categories within the commercial loan and lease portfolio permits management’s use of transition matrices to estimate a quantitative portion of credit risk. Our internal credit risk grading system is based on past experiences with similarly graded loans and leases and conforms with regulatory categories. In general, loan and lease risk ratings within each category are reviewed on an ongoing basis according to our policy for each class of loans and leases. Each quarter, management analyzes the resulting ratings, as well as other external statistics and factors such as delinquency, to track the migration performance of the commercial loan and lease portfolio. Loans and leases within the Pass credit category or that migrate toward the Pass credit category generally have a lower risk of loss compared to loans and leases that migrate toward the Substandard or Doubtful credit categories. Accordingly, management applies higher risk factors to Substandard and Doubtful credit categories.

The following tables present a summary of our commercial loans and leases by credit quality category, segregated by loans and leases originated and loans acquired:

	Commercial Loan and Lease Credit Quality Categories
(in thousands)	Pass		Special Mention		Substandard		Doubtful		Total
Originated Loans and Leases
March 31, 2018
Commercial real estate	$	5,195,183	$	148,120	$	121,542	$	305	$	5,465,150
Commercial and industrial	3,412,745		191,627		80,803		2,945		3,688,120
Commercial leases	269,837		3,518		6,227		—		279,582
Other	38,231		43		1,073		—		39,347
Total originated commercial loans and leases	$	8,915,996	$	343,308	$	209,645	$	3,250	$	9,472,199
December 31, 2017
Commercial real estate	$	4,922,872	$	152,744	$	98,728	$	439	$	5,174,783
Commercial and industrial	3,266,966		132,975		92,091		3,215		3,495,247
Commercial leases	260,235		4,425		2,060		—		266,720
Other	15,866		43		1,154		—		17,063
Total originated commercial loans and leases	$	8,465,939	$	290,187	$	194,033	$	3,654	$	8,953,813
Acquired Loans
March 31, 2018
Commercial real estate	$	2,877,345	$	225,364	$	243,402	$	214	$	3,346,325
Commercial and industrial	520,361		28,166		43,314		8		591,849
Total acquired commercial loans	$	3,397,706	$	253,530	$	286,716	$	222	$	3,938,174
December 31, 2017
Commercial real estate	$	3,102,788	$	250,987	$	213,089	$	217	$	3,567,081
Commercial and industrial	603,611		26,059		45,661		89		675,420
Total acquired commercial loans	$	3,706,399	$	277,046	$	258,750	$	306	$	4,242,501

Credit quality information for acquired loans is based on the contractual balance outstanding at March 31, 2018 and December 31, 2017.

We use delinquency transition matrices within the consumer and other loan classes to enable management to estimate a quantitative portion of credit risk. Each month, management analyzes payment and volume activity, Fair Isaac Corporation (FICO) scores and other external factors such as unemployment, to determine how consumer loans are performing.

Following is a table showing consumer loans by payment status:

	Consumer Loan Credit Quality by Payment Status
(in thousands)	Performing		Non- Performing		Total
Originated loans
March 31, 2018
Direct installment	$	1,721,589	$	15,653	$	1,737,242
Residential mortgages	2,115,204		16,134		2,131,338
Indirect installment	1,521,906		2,424		1,524,330
Consumer lines of credit	1,130,978		4,510		1,135,488
Total originated consumer loans	$	6,489,677	$	38,721	$	6,528,398
December 31, 2017
Direct installment	$	1,739,060	$	16,653	$	1,755,713
Residential mortgages	2,019,816		16,410		2,036,226
Indirect installment	1,445,833		2,435		1,448,268
Consumer lines of credit	1,147,576		3,894		1,151,470
Total originated consumer loans	$	6,352,285	$	39,392	$	6,391,677
Acquired loans
March 31, 2018
Direct installment	$	134,327	$	70	$	134,397
Residential mortgages	630,763		—		630,763
Indirect installment	171		—		171
Consumer lines of credit	556,633		1,662		558,295
Total acquired consumer loans	$	1,321,894	$	1,732	$	1,323,626
December 31, 2017
Direct installment	$	149,751	$	71	$	149,822
Residential mortgages	666,465		—		666,465
Indirect installment	165		—		165
Consumer lines of credit	592,384		1,939		594,323
Total acquired consumer loans	$	1,408,765	$	2,010	$	1,410,775

Loans and leases are designated as impaired when, in the opinion of management, based on current information and events, the collection of principal and interest in accordance with the loan and lease contract is doubtful. Typically, we do not consider loans and leases for impairment unless a sustained period of delinquency (i.e., 90-plus days) is noted or there are subsequent events that impact repayment probability (i.e., negative financial trends, bankruptcy filings, imminent foreclosure proceedings, etc.). Impairment is evaluated in the aggregate for consumer installment loans, residential mortgages, consumer lines of credit and commercial loan and lease relationships less than $0.5 million based on loan and lease segment loss given default. For commercial loan and lease relationships greater than or equal to $0.5 million, a specific valuation allowance is allocated, if necessary, so that the loan is reported net, at the present value of estimated future cash flows using a market interest rate or at the fair value of collateral if repayment is expected solely from the collateral. Consistent with our existing method of income recognition for loans and leases, interest income on impaired loans, except those classified as non-accrual, is recognized using the accrual method. Impaired loans, or portions thereof, are charged off when deemed uncollectible.

Following is a summary of information pertaining to originated loans and leases considered to be impaired, by class of loan and lease:

(in thousands)	Unpaid Contractual Principal Balance		Recorded Investment With No Specific Reserve		Recorded Investment With Specific Reserve		Total Recorded Investment		Specific Reserve		Average Recorded Investment
At or for the Three Months Ended March 31, 2018
Commercial real estate	$	30,584	$	25,478	$	1,751	$	27,229	$	305	$	25,988
Commercial and industrial	26,034		15,859		5,007		20,866		2,945		20,479
Commercial leases	1,399		1,399		—		1,399		—		1,486
Other	—		—		—		—		—		—
Total commercial loans and leases	58,017		42,736		6,758		49,494		3,250		47,953
Direct installment	18,623		15,653		—		15,653		—		16,153
Residential mortgages	17,448		16,134		—		16,134		—		16,272
Indirect installment	4,648		2,424		—		2,424		—		2,429
Consumer lines of credit	5,698		4,510		—		4,510		—		4,202
Total consumer loans	46,417		38,721		—		38,721		—		39,056
Total	$	104,434	$	81,457	$	6,758	$	88,215	$	3,250	$	87,009
At or for the Year Ended December 31, 2017
Commercial real estate	$	27,718	$	21,748	$	2,906	$	24,654	$	439	$	24,413
Commercial and industrial	29,307		11,595		4,457		16,052		3,215		23,907
Commercial leases	1,574		1,574		—		1,574		—		1,386
Other	—		—		—		—		—		—
Total commercial loans and leases	58,599		34,917		7,363		42,280		3,654		49,706
Direct installment	19,375		16,653		—		16,653		—		16,852
Residential mortgages	17,754		16,410		—		16,410		—		15,984
Indirect installment	5,709		2,435		—		2,435		—		2,279
Consumer lines of credit	5,039		3,894		—		3,894		—		3,815
Total consumer loans	47,877		39,392		—		39,392		—		38,930
Total	$	106,476	$	74,309	$	7,363	$	81,672	$	3,654	$	88,636

Interest income continued to accrue on certain impaired loans and totaled approximately $1.6 million and $1.9 million for the three months ended March 31, 2018 and 2017, respectively. The above tables do not reflect the additional allowance for credit losses relating to acquired loans. Following is a summary of the allowance for credit losses required for acquired loans due to changes in credit quality subsequent to the acquisition date:

(in thousands)	March 31, 2018			December 31, 2017
Commercial real estate	$	2,732		$	4,976
Commercial and industrial	1,785			(415		)
Total commercial loans	4,517			4,561
Direct installment	1,804			1,553
Residential mortgages	518			484
Indirect installment	240			177
Consumer lines of credit	(242		)	(77		)
Total consumer loans	2,320			2,137
Total allowance on acquired loans	$	6,837		$	6,698

Troubled Debt Restructurings

TDRs are loans whose contractual terms have been modified in a manner that grants a concession to a borrower experiencing financial difficulties. TDRs typically result from loss mitigation activities and could include the extension of a maturity date, interest rate reduction, principal forgiveness, deferral or decrease in payments for a period of time and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of collateral.

Following is a summary of the composition of total TDRs:

(in thousands)	Originated		Acquired		Total
March 31, 2018
Accruing:
Performing	$	19,525	$	249	$	19,774
Non-performing	21,283		3,169		24,452
Non-accrual	10,668		357		11,025
Total TDRs	$	51,476	$	3,775	$	55,251
December 31, 2017
Accruing:
Performing	$	19,538	$	266	$	19,804
Non-performing	20,173		3,308		23,481
Non-accrual	10,472		234		10,706
Total TDRs	$	50,183	$	3,808	$	53,991

TDRs that are accruing and performing include loans that met the criteria for non-accrual of interest prior to restructuring for which we can reasonably estimate the timing and amount of the expected cash flows on such loans and for which we expect to fully collect the new carrying value of the loans. During the three months ended March 31, 2018, we returned to performing status $1.2 million in restructured residential mortgage loans that have consistently met their modified obligations for more than six months. TDRs that are accruing and non-performing are comprised of consumer loans that have not demonstrated a consistent repayment pattern on the modified terms for more than six months, however it is expected that we will collect all future principal and interest payments. TDRs that are on non-accrual are not placed on accruing status until all delinquent principal and interest have been paid and the ultimate collectability of the remaining principal and interest is reasonably assured. Some loan modifications classified as TDRs may not ultimately result in the full collection of principal and interest, as modified, and may result in potential incremental losses which are factored into the allowance for credit losses.

Excluding purchased impaired loans, commercial loans over $0.5 million whose terms have been modified in a TDR are generally placed on non-accrual, individually analyzed and measured for estimated impairment based on the fair value of the underlying collateral. Our allowance for credit losses included specific reserves for commercial TDRs and pooled reserves for individually impaired loans under $0.5 million based on loan segment loss given default. Upon default, the amount of the recorded investment in the TDR in excess of the fair value of the collateral, less estimated selling costs, is generally considered a confirmed loss and is charged-off against the allowance for credit losses. The reserve for commercial TDRs included in the allowance for credit losses is presented in the following table:

(in thousands)	March 31, 2018		December 31, 2017
Specific reserves for commercial TDRs	$	726	$	95
Pooled reserves for individual commercial loans	519		469

All other classes of loans, which are primarily secured by residential properties, whose terms have been modified in a TDR are pooled and measured for estimated impairment based on the expected net present value of the estimated future cash flows of the pool. Our allowance for credit losses included pooled reserves for these classes of loans of $4.0 million for both March 31, 2018 and December 31, 2017. Upon default of an individual loan, our charge-off policy is followed accordingly for that class of loan.

Following is a summary of TDR loans, by class:

	Three Months Ended March 31, 2018
(dollars in thousands)	Number of Contracts	Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment
Commercial real estate	1	$	328	$	328
Commercial and industrial	1	1,687		1,230
Total commercial loans	2	2,015		1,558
Direct installment	182	1,135		1,056
Residential mortgages	11	501		504
Indirect installment	9	13		12
Consumer lines of credit	21	352		287
Total consumer loans	223	2,001		1,859
Total	225	$	4,016	$	3,417

	Three Months Ended March 31, 2017
(dollars in thousands)	Number of Contracts	Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment
Commercial real estate	1	$	114	$	109
Commercial and industrial	—	—		—
Total commercial loans	1	114		109
Direct installment	171	1,488		1,412
Residential mortgages	8	163		176
Indirect installment	5	17		14
Consumer lines of credit	22	742		729
Total consumer loans	206	2,410		2,331
Total	207	$	2,524	$	2,440

Following is a summary of originated TDRs, by class, for which there was a payment default, excluding loans that were either charged-off or cured by period end. Default occurs when a loan is 90 days or more past due and is within 12 months of restructuring.

	Three Months Ended March 31, 2018
(dollars in thousands)	Number of Contracts	Recorded Investment
Direct installment	45	$	130
Residential mortgages	4	190
Indirect installment	5	10
Consumer lines of credit	1	196
Total consumer loans	55	526
Total	55	$	526

	Three Months Ended March 31, 2017
(dollars in thousands)	Number of Contracts	Recorded Investment
Direct installment	29	$	82
Residential mortgages	2	224
Indirect installment	6	10
Consumer lines of credit	1	34
Total consumer loans	38	350
Total	38	$	350

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ALLOWANCE FOR CREDIT LOSSES

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

ALLOWANCE FOR CREDIT LOSSES

ALLOWANCE FOR CREDIT LOSSES

The allowance for credit losses addresses credit losses inherent in the existing loan and lease portfolio and is presented as a reserve against loans and leases on the Consolidated Balance Sheets. Loan and lease losses are charged off against the allowance for credit losses, with recoveries of amounts previously charged off credited to the allowance for credit losses. Provisions for credit losses are charged to operations based on management’s periodic evaluation of the adequacy of the allowance for credit losses.

Following is a summary of changes in the allowance for credit losses, by loan and lease class:

(in thousands)	Balance at Beginning of Period		Charge- Offs			Recoveries		Net Charge- Offs			Provision for Credit Losses			Balance at End of Period
Three Months Ended March 31, 2018
Commercial real estate	$	50,281	$	(225	)	$	337	$	112		$	3,123		$	53,516
Commercial and industrial	51,963		(5,920		)	369		(5,551		)	6,601			53,013
Commercial leases	5,646		(171		)	10		(161		)	630			6,115
Other	1,843		(797		)	297		(500		)	652			1,995
Total commercial loans and leases	109,733		(7,113		)	1,013		(6,100		)	11,006			114,639
Direct installment	20,936		(3,470		)	440		(3,030		)	2,222			20,128
Residential mortgages	15,507		(79		)	91		12			(239		)	15,280
Indirect installment	11,967		(2,409		)	895		(1,514		)	1,502			11,955
Consumer lines of credit	10,539		(531		)	121		(410		)	279			10,408
Total consumer loans	58,949		(6,489		)	1,547		(4,942		)	3,764			57,771
Total allowance on originated loans and leases	168,682		(13,602		)	2,560		(11,042		)	14,770			172,410
Purchased credit-impaired loans	635		—			—		—			(13		)	622
Other acquired loans	6,063		(309		)	723		414			(262		)	6,215
Total allowance on acquired loans	6,698		(309		)	723		414			(275		)	6,837
Total allowance for credit losses	$	175,380	$	(13,911	)	$	3,283	$	(10,628	)	$	14,495		$	179,247

(in thousands)	Balance at Beginning of Period		Charge- Offs			Recoveries		Net Charge- Offs			Provision for Credit Losses			Balance at End of Period
Three Months Ended March 31, 2017
Commercial real estate	$	46,635	$	(988	)	$	361	$	(627	)	$	381		$	46,389
Commercial and industrial	47,991		(2,463		)	474		(1,989		)	7,568			53,570
Commercial leases	3,280		(506		)	1		(505		)	738			3,513
Other	1,392		(973		)	327		(646		)	1,063			1,809
Total commercial loans and leases	99,298		(4,930		)	1,163		(3,767		)	9,750			105,281
Direct installment	21,391		(2,874		)	628		(2,246		)	1,065			20,210
Residential mortgages	10,082		(180		)	161		(19		)	147			10,210
Indirect installment	10,564		(2,370		)	781		(1,589		)	655			9,630
Consumer lines of credit	9,456		(458		)	165		(293		)	(280		)	8,883
Total consumer loans	51,493		(5,882		)	1,735		(4,147		)	1,587			48,933
Total allowance on originated loans and leases	150,791		(10,812		)	2,898		(7,914		)	11,337			154,214
Purchased credit-impaired loans	572		—			—		—			88			660
Other acquired loans	6,696		(482		)	269		(213		)	(575		)	5,908
Total allowance on acquired loans	7,268		(482		)	269		(213		)	(487		)	6,568
Total allowance for credit losses	$	158,059	$	(11,294	)	$	3,167	$	(8,127	)	$	10,850		$	160,782

Following is a summary of the individual and collective originated allowance for credit losses and corresponding originated loan and lease balances by class:

	Originated Allowance				Originated Loans and Leases Outstanding
(in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Loans and Leases		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
March 31, 2018
Commercial real estate	$	305	$	53,211	$	5,465,150	$	12,292	$	5,452,858
Commercial and industrial	2,945		50,068		3,688,120		10,880		3,677,240
Commercial leases	—		6,115		279,582		—		279,582
Other	—		1,995		39,347		—		39,347
Total commercial loans and leases	3,250		111,389		9,472,199		23,172		9,449,027
Direct installment	—		20,128		1,737,242		—		1,737,242
Residential mortgages	—		15,280		2,131,338		—		2,131,338
Indirect installment	—		11,955		1,524,330		—		1,524,330
Consumer lines of credit	—		10,408		1,135,488		—		1,135,488
Total consumer loans	—		57,771		6,528,398		—		6,528,398
Total	$	3,250	$	169,160	$	16,000,597	$	23,172	$	15,977,425
December 31, 2017
Commercial real estate	$	439	$	49,842	$	5,174,783	$	11,114	$	5,163,669
Commercial and industrial	3,215		48,748		3,495,247		9,872		3,485,375
Commercial leases	—		5,646		266,720		—		266,720
Other	—		1,843		17,063		—		17,063
Total commercial loans and leases	3,654		106,079		8,953,813		20,986		8,932,827
Direct installment	—		20,936		1,755,713		—		1,755,713
Residential mortgages	—		15,507		2,036,226		—		2,036,226
Indirect installment	—		11,967		1,448,268		—		1,448,268
Consumer lines of credit	—		10,539		1,151,470		—		1,151,470
Total consumer loans	—		58,949		6,391,677		—		6,391,677
Total	$	3,654	$	165,028	$	15,345,490	$	20,986	$	15,324,504

The above table excludes acquired loans that were pooled into groups of loans for evaluating impairment.

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LOAN SERVICING

3 Months Ended

Mar. 31, 2018

Transfers and Servicing [Abstract]

LOAN SERVICING

LOAN SERVICING

Mortgage Loan Servicing

We retain the servicing rights on certain mortgage loans sold. The unpaid principal balance of mortgage loans serviced for others, as of March 31, 2018 and December 31, 2017, is listed below:

(in thousands)	March 31, 2018		December 31, 2017
Mortgage loans sold with servicing retained	$	3,417,642	$	3,256,548

The following table summarizes activity relating to mortgage loans sold with servicing retained:

	Three Months Ended March 31,
(in thousands)	2018		2017
Mortgage loans sold with servicing retained	$	236,893	$	129,843
Pretax gains resulting from above loan sales (1)	3,798		3,638
Mortgage servicing fees (1)	2,174		1,603

(1) Recorded in mortgage banking operations.

Following is a summary of the MSR activity:

	Three Months Ended March 31,
(in thousands)	2018			2017
Balance at beginning of period	$	29,053		$	13,521
Fair value of MSRs acquired	—			8,553
Additions	2,710			1,454
Payoffs and curtailments	(405		)	(139		)
Amortization	(567		)	(523		)
Balance at end of period	$	30,791		$	22,866
Fair value, beginning of period	$	32,419		$	17,546
Fair value, end of period	36,445			26,962

We did not have a valuation allowance for MSRs for any of the periods presented in the table above.

The fair value of MSRs is highly sensitive to changes in assumptions and is determined by estimating the present value of the asset’s future cash flows utilizing market-based prepayment rates, discount rates and other assumptions validated through comparison to trade information, industry surveys and with the use of independent third party appraisals. Changes in prepayment speed assumptions have the most significant impact on the fair value of MSRs. Generally, as interest rates decline, mortgage loan prepayments accelerate due to increased refinance activity, which results in a decrease in the fair value of the MSR and as interest rates increase, mortgage loan prepayments decline, which results in an increase in the fair value of the MSR. Measurement of fair value is limited to the conditions existing and the assumptions utilized as of a particular point in time, and those assumptions may not be appropriate if they are applied at a different time.

Following is a summary of the sensitivity of the fair value of MSRs to changes in key assumptions:

(dollars in thousands)	March 31, 2018			December 31, 2017
Weighted average life (months)	84.5			80.4
Constant prepayment rate (annualized)	9.1		%	9.9		%
Discount rate	9.9		%	9.9		%
Effect on fair value due to change in interest rates:
+0.25%	$	1,179		$	1,737
+0.50%	2,131			3,220
-0.25%	(1,476		)	(1,937		)
-0.50%	(3,237		)	(4,007		)

The sensitivity calculations above are hypothetical and should not be considered to be predictive of future performance. Changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the changes in assumptions to fair value may not be linear. Also, in this table, the effects of an adverse variation in a particular assumption on the fair value of the MSRs is calculated without changing any other assumptions, while in reality, changes in one factor may result in changing another, which may magnify or contract the effect of the change.

SBA-Guaranteed Loan Servicing

Beginning in March 2017, as a result of the YDKN acquisition, we retain the servicing rights on SBA-guaranteed loans sold to investors. The standard sale structure under the SBA Secondary Participation Guaranty Agreement provides for us to retain a portion of the cash flow from the interest payment received on the loan, which is commonly known as a servicing spread. The unpaid principal balance of SBA-guaranteed loans serviced for investors, as of March 31, 2018 and December 31, 2017, was as follows:

(in thousands)	March 31, 2018		December 31, 2017
SBA loans sold to investors with servicing retained	$	300,857	$	305,977

The following table summarizes activity relating to SBA loans sold with servicing retained:

	Three Months Ended March 31,
(in thousands)	2018		2017
SBA loans sold with servicing retained	$	12,288	$	—
Pretax gains resulting from above loan sales (1)	1,101		—
SBA servicing fees (1)	750		115

(1) Recorded in non-interest income.

Following is a summary of the activity in SBA servicing rights:

	Three Months Ended March 31,
(in thousands)	2017			2017
Balance at beginning of period	$	5,058		$	—
Fair value of servicing rights acquired	—			5,399
Additions	388			—
Impairment (charge) / recovery	(90		)	—
Amortization	(294		)	(60		)
Balance at end of period	$	5,062		$	5,339
Fair value, beginning of period	$	5,058		$	—
Fair value, end of period	5,062			5,339

Following is a summary of key assumptions and the sensitivity of the SBA loan servicing rights to changes in these assumptions:

	March 31, 2018														December 31, 2017
			Decline in fair value due to														Decline in fair value due to
(dollars in thousands)	Actual		10% adverse change			20% adverse change			1% adverse change			2% adverse change			Actual		10% adverse change			20% adverse change			1% adverse change			2% adverse change
Weighted-average life (months)	61.0														63.5
Constant prepayment rate (annualized)	10.01	%	$	(158	)	$	(309	)	$	—		$	—		9.29	%	$	(145	)	$	(284	)	$	—		$	—
Discount rate	14.76		—			—			(148		)	(287		)	14.87		—			—			(147		)	(286		)

The fair value of the SBA servicing rights is compared to the amortized basis. If the amortized basis exceeds the fair value, the asset is considered impaired and is written down to fair value through a valuation allowance on the asset and a charge against SBA income. We had a $0.4 million valuation allowance for SBA servicing rights as of March 31, 2018.

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BORROWINGS

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

BORROWINGS

BORROWINGS

Following is a summary of short-term borrowings:

(in thousands)	March 31, 2018		December 31, 2017
Securities sold under repurchase agreements	$	280,492	$	256,017
Federal Home Loan Bank advances	1,555,000		2,285,000
Federal funds purchased	1,830,000		1,000,000
Subordinated notes	136,988		137,320
Total short-term borrowings	$	3,802,480	$	3,678,337

Borrowings with original maturities of one year or less are classified as short-term. Securities sold under repurchase agreements are comprised of customer repurchase agreements, which are sweep accounts with next day maturities utilized by larger commercial customers to earn interest on their funds. Securities are pledged to these customers in an amount equal to the outstanding balance.

Following is a summary of long-term borrowings:

(in thousands)	March 31, 2018		December 31, 2017
Federal Home Loan Bank advances	$	300,053	$	310,061
Subordinated notes	89,523		87,614
Junior subordinated debt	110,466		110,347
Other subordinated debt	159,848		160,151
Total long-term borrowings	$	659,890	$	668,173

Our banking affiliate has available credit with the FHLB of $7.8 billion, of which $1.9 billion was utilized as of March 31, 2018. These advances are secured by loans collateralized by residential mortgages, home equity lines of credit, commercial real estate and FHLB stock and are scheduled to mature in various amounts periodically through the year 2021. Effective interest rates paid on the long-term advances ranged from 1.39% to 4.19% for the three months ended March 31, 2018 and 0.95% to 4.19% for the year ended December 31, 2017.

The junior subordinated debt is comprised of the debt securities issued by FNB in relation to our unconsolidated subsidiary trusts (collectively, the Trusts), which are unconsolidated variable interest entities, and is included on the balance sheet in long-term borrowings. Since third-party investors are the primary beneficiaries, the Trusts are not consolidated in our financial statements. We record the distributions on the junior subordinated debt issued to the Trusts as interest expense.

The following table provides information relating to the Trusts as of March 31, 2018:

(dollars in thousands)	Trust Preferred Securities		Common Securities		Junior Subordinated Debt		Stated Maturity Date	Interest Rate		Rate Reset Factor
F.N.B. Statutory Trust II	$	21,500	$	665	$	22,165	6/15/2036	3.77	%	LIBOR + 165 basis points (bps)
Omega Financial Capital Trust I	26,000		1,114		26,483		10/18/2034	3.92	%	LIBOR + 219 bps
Yadkin Valley Statutory Trust I	25,000		774		20,925		12/15/2037	3.44	%	LIBOR + 132 bps
FNB Financial Services Capital Trust I	25,000		774		21,859		9/30/2035	3.79	%	LIBOR + 146 bps
American Community Capital Trust II	10,000		310		10,446		12/15/2033	5.11	%	LIBOR + 280 bps
Crescent Financial Capital Trust I	8,000		248		8,588		10/7/2033	4.82	%	LIBOR + 310 bps
Total	$	115,500	$	3,885	$	110,466

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

We are exposed to certain risks arising from both our business operations and economic conditions. We principally manage our exposures to a wide variety of business and operational risks through management of our core business activities. We manage economic risks, including interest rate risk, primarily by managing the amount, source, and duration of our assets and liabilities, and through the use of derivative instruments. Derivative instruments are used to reduce the effects that changes in interest rates may have on net income and cash flows. We also use derivative instruments to facilitate transactions on behalf of our customers.

All derivatives are carried on the Consolidated Balance Sheets at fair value and do not take into account the effects of master netting arrangements we have with other financial institutions. Credit risk is included in the determination of the estimated fair value of derivatives. Derivative assets are reported in the Consolidated Balance Sheets in other assets and derivative liabilities are reported in the Consolidated Balance Sheets in other liabilities. Changes in fair value are recognized in earnings except for certain changes related to derivative instruments designated as part of a cash flow hedging relationship.

The following table presents notional amounts and gross fair values of our derivative assets and derivative liabilities which are not offset in the balance sheet.

	March 31, 2018						December 31, 2017
	Notional		Fair Value				Notional		Fair Value
(in thousands)	Amount		Asset		Liability		Amount		Asset		Liability
Gross Derivatives
Subject to master netting arrangements:
Interest rate contracts – designated	$	705,000	$	—	$	3,662	$	705,000	$	228	$	1,982
Interest rate swaps – not designated	2,422,236		3,481		9,117		2,245,442		1,169		11,599
Equity contracts – not designated	1,180		26		—		1,180		51		—
Total subject to master netting arrangements	3,128,416		3,507		12,779		2,951,622		1,448		13,581
Not subject to master netting arrangements:
Interest rate swaps – not designated	2,422,236		15,176		38,787		2,245,442		27,233		15,303
Interest rate lock commitments – not designated	78,368		1,380		5		88,107		1,594		5
Forward delivery commitments – not designated	94,996		209		231		106,572		233		148
Credit risk contracts – not designated	206,747		20		64		235,196		39		109
Equity contracts – not designated	1,180		—		26		1,180		—		51
Total not subject to master netting arrangements	2,803,527		16,785		39,113		2,676,497		29,099		15,616
Total	$	5,931,943	$	20,292	$	51,892	$	5,628,119	$	30,547	$	29,197

Beginning in the first quarter of 2017, certain derivative exchanges have enacted a rule change which in effect results in the legal characterization of variation margin payments for certain derivative contracts as settlement of the derivatives mark-to-market exposure and not collateral. This rule change became effective for us in the first quarter of 2017. Accordingly, we have changed our reporting of certain derivatives to record variation margin on trades cleared through exchanges that have adopted the rule change as settled where we had previously recorded cash collateral. The daily settlement of the derivative exposure does not change or reset the contractual terms of the instrument.

Derivatives Designated as Hedging Instruments under GAAP

Interest Rate Contracts. We entered into interest rate derivative agreements to modify the interest rate characteristics of certain commercial loans and five of our FHLB advances from variable rate to fixed rate in order to reduce the impact of changes in future cash flows due to market interest rate changes. These agreements are designated as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows). The effective portion of the derivative’s gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings in the same line item associated with the forecasted transaction when the forecasted transaction affects earnings. Any ineffective portion of the gain or loss is reported in earnings immediately.

Following is a summary of key data related to interest rate contracts:

(in thousands)	March 31, 2018		December 31, 2017
Notional amount	$	705,000	$	705,000
Fair value included in other assets	—		228
Fair value included in other liabilities	3,662		1,982

The following table shows amounts reclassified from accumulated other comprehensive income for the three months ended March 31, 2018:

(in thousands)	Total			Net of Tax
Reclassified from AOCI to interest income	$	93		$	73
Reclassified from AOCI to interest expense	(129		)	(102		)

As of March 31, 2018, the maximum length of time over which forecasted interest cash flows are hedged is 5 years. In the twelve months that follow March 31, 2018, we expect to reclassify from the amount currently reported in AOCI net derivative gains of $3.2 million ($2.5 million net of tax), in association with interest on the hedged loans and FHLB advances. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, and the addition of other hedges subsequent to March 31, 2018.

There were no components of derivative gains or losses excluded from the assessment of hedge effectiveness related to these cash flow hedges. For the three months ended March 31, 2018 and 2017, there was no hedge ineffectiveness. Also, during the three months ended March 31, 2018 and 2017, there were no gains or losses from cash flow hedge derivatives reclassified to earnings because it became probable that the original forecasted transactions would not occur.

Derivatives Not Designated as Hedging Instruments under GAAP

Interest Rate Swaps. We enter into interest rate swap agreements to meet the financing, interest rate and equity risk management needs of qualifying commercial loan customers. These agreements provide the customer the ability to convert from variable to fixed interest rates. The credit risk associated with derivatives executed with customers is essentially the same as that involved in extending loans and is subject to normal credit policies and monitoring. Swap derivative transactions with customers are not subject to enforceable master netting arrangements and are generally secured by rights to non-financial collateral, such as real and personal property.

We enter into positions with a derivative counterparty in order to offset our exposure on the fixed components of the customer interest rate swap agreements. We seek to minimize counterparty credit risk by entering into transactions only with high-quality financial dealer institutions. These arrangements meet the definition of derivatives, but are not designated as hedging instruments under ASC 815, Derivatives and Hedging.

Following is a summary of key data related to interest rate swaps:

(in thousands)	March 31, 2018		December 31, 2017
Notional amount	$	4,844,472	$	4,490,884
Fair value included in other assets	18,657		28,402
Fair value included in other liabilities	47,904		26,902

The interest rate swap agreement with the loan customer and with the counterparty is reported at fair value in other assets and other liabilities on the Consolidated Balance Sheets with any resulting gain or loss recorded in current period earnings as other income or other expense.

Interest Rate Lock Commitments. Interest rate lock commitments represent an agreement to extend credit to a mortgage loan borrower, or an agreement to purchase a loan from a third-party originator, whereby the interest rate on the loan is set prior to funding. We are bound to fund the loan at a specified rate, regardless of whether interest rates have changed between the commitment date and the loan funding date, subject to the loan approval process. The borrower is not obligated to perform under the commitment. As such, outstanding IRLCs subject us to interest rate risk and related price risk during the period from the commitment to the borrower through the loan funding date, or commitment expiration. The IRLCs generally range between 30 to 270 days. The IRLCs are reported at fair value in other assets and other liabilities on the Consolidated Balance Sheets with any resulting gain or loss recorded in current period earnings as mortgage banking operations income.

Forward Delivery Commitments. Forward delivery commitments on mortgage-backed securities are used to manage the interest rate and price risk of our IRLCs and mortgage loan held for sale inventory by fixing the forward sale price that will be realized upon sale of the mortgage loans into the secondary market. Historical commitment-to-closing ratios are considered to estimate the quantity of mortgage loans that will fund within the terms of the IRLCs. The forward delivery contracts are reported at fair value in other assets and other liabilities on the Consolidated Balance Sheets with any resulting gain or loss recorded in current period earnings as mortgage banking operations income.

Credit Risk Contracts. We purchase and sell credit protection under risk participation agreements to share with other counterparties some of the credit exposure related to interest rate derivative contracts or to take on credit exposure to generate revenue. We will make/receive payments under these agreements if a customer defaults on their obligation to perform under certain derivative swap contracts.

Risk participation agreements sold with notional amounts totaling $128.7 million as of March 31, 2018 have remaining terms ranging from three months to nine years. Under these agreements, our maximum exposure assuming a customer defaults on their obligation to perform under certain derivative swap contracts with third parties would be $0.06 million and $0.1 million at March 31, 2018 and December 31, 2017, respectively. The fair values of risk participation agreements purchased and sold were $0.02 million and $(0.06) million, respectively, at December 31, 2018 and $0.04 million and $(0.1) million, respectively at December 31, 2017.

Counterparty Credit Risk

We are party to master netting arrangements with most of our swap derivative dealer counterparties. Collateral, usually marketable securities and/or cash, is exchanged between FNB and our counterparties, and is generally subject to thresholds and transfer minimums. For swap transactions that require central clearing, we post cash to our clearing agency. Collateral positions are settled or valued daily, and adjustments to amounts received and pledged by us are made as appropriate to maintain proper collateralization for these transactions.

Certain master netting agreements contain provisions that, if violated, could cause the counterparties to request immediate settlement or demand full collateralization under the derivative instrument. If we had breached our agreements with our derivative counterparties we would be required to settle our obligations under the agreements at the termination value and would be required to pay an additional $0.6 million and $0.9 million as of March 31, 2018 and December 31, 2017, respectively, in excess of amounts previously posted as collateral with the respective counterparty.

The following table presents a reconciliation of the net amounts of derivative assets and derivative liabilities presented in the balance sheets to the net amounts that would result in the event of offset:

			Amount Not Offset in the Balance Sheet
(in thousands)	Net Amount Presented in the Balance Sheet		Financial Instruments		Cash Collateral		Net Amount
March 31, 2018
Derivative Assets
Interest rate contracts:
Designated	$	—	$	—	$	—	$	—
Not designated	3,481		3,451		—		30
Equity contracts – not designated	26		26		—		—
Total	$	3,507	$	3,477	$	—	$	30

Derivative Liabilities
Interest rate contracts:
Designated	$	3,662	$	3,662	$	—	$	—
Not designated	9,117		8,592		—		525
Total	$	12,779	$	12,254	$	—	$	525

December 31, 2017
Derivative Assets
Interest rate contracts:
Designated	$	228	$	228	$	—	$	—
Not designated	1,169		1,169		—		—
Equity contracts – not designated	51		51		—		—
Total	$	1,448	$	1,448	$	—	$	—

Derivative Liabilities
Interest rate contracts:
Designated	$	1,982	$	1,982	$	—	$	—
Not designated	11,599		10,940		—		659
Total	$	13,581	$	12,922	$	—	$	659

The following table presents the effect of certain derivative financial instruments on the income statement:

		Three Months Ended March 31,
(in thousands)	Income Statement Location	2018			2017
Interest Rate Contracts	Interest income - loans and leases	$	93		$	506
Interest Rate Contracts	Interest expense – short-term borrowings	(129		)	148
Interest Rate Swaps	Other income	(160		)	(219		)
Credit Risk Contracts	Other income	27			19

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COMMITMENTS, CREDIT RISK AND CONTINGENCIES

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS, CREDIT RISK AND CONTINGENCIES

COMMITMENTS, CREDIT RISK AND CONTINGENCIES

We have commitments to extend credit and standby letters of credit that involve certain elements of credit risk in excess of the amount stated in the Consolidated Balance Sheets. Our exposure to credit loss in the event of non-performance by the customer is represented by the contractual amount of those instruments. The credit risk associated with commitments to extend credit and standby letters of credit is essentially the same as that involved in extending loans and leases to customers and is subject to normal credit policies. Since many of these commitments expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements.

Following is a summary of off-balance sheet credit risk information:

(in thousands)	March 31, 2018		December 31, 2017
Commitments to extend credit	$	7,097,958	$	6,957,822
Standby letters of credit	136,661		132,904

At March 31, 2018, funding of 76.4% of the commitments to extend credit was dependent on the financial condition of the customer. We have the ability to withdraw such commitments at our discretion. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Based on management’s credit evaluation of the customer, collateral may be deemed necessary. Collateral requirements vary and may include accounts receivable, inventory, property, plant and equipment and income-producing commercial properties.

Standby letters of credit are conditional commitments issued by us that may require payment at a future date. The credit risk involved in issuing letters of credit is actively monitored through review of the historical performance of our portfolios.

In addition to the above commitments, subordinated notes issued by FNB Financial Services, LP, a wholly-owned finance subsidiary, are fully and unconditionally guaranteed by FNB. These subordinated notes are included in the summaries of short-term borrowings and long-term borrowings in Note 8.

Other Legal Proceedings

In the ordinary course of business, we are routinely named as defendants in, or made parties to, pending and potential legal actions. Also, as regulated entities, we are subject to governmental and regulatory examinations, information-gathering requests, and may be subject to investigations and proceedings (both formal and informal). Such threatened claims, litigation, investigations, regulatory and administrative proceedings typically entail matters that are considered incidental to the normal conduct of business. Claims for significant monetary damages may be asserted in many of these types of legal actions, while claims for disgorgement, restitution, penalties and/or other remedial actions or sanctions may be sought in regulatory matters. In these instances, if we determine that we have meritorious defenses, we will engage in an aggressive defense. However, if management determines, in consultation with counsel, that settlement of a matter is in the best interest of our Company and our shareholders, we may do so. It is inherently difficult to predict the eventual outcomes of such matters given their complexity and the particular facts and circumstances at issue in each of these matters. However, on the basis of current knowledge and understanding, and advice of counsel, we do not believe that judgments, sanctions, settlements or orders, if any, that may arise from these matters (either individually or in the aggregate, after giving effect to applicable reserves and insurance coverage) will have a material adverse effect on our financial position or liquidity, although they could have a material effect on net income in a given period.

In view of the inherent unpredictability of outcomes in litigation and governmental and regulatory matters, particularly where (i) the damages sought are indeterminate, (ii) the proceedings are in the early stages, or (iii) the matters involve novel legal theories or a large number of parties, as a matter of course, there is considerable uncertainty surrounding the timing or ultimate resolution of litigation and governmental and regulatory matters, including a possible eventual loss, fine, penalty, business or adverse reputational impact, if any, associated with each such matter. In accordance with applicable accounting guidance, we establish accruals for litigation and governmental and regulatory matters when those matters proceed to a stage where they present loss contingencies that are both probable and reasonably estimable. In such cases, there may be a possible exposure to loss in excess of any amounts accrued. We will continue to monitor such matters for developments that could affect the amount of the accrual, and will adjust the accrual amount as appropriate. If the loss contingency in question is not both probable and reasonably estimable, we do not establish an accrual and the matter will continue to be monitored for any developments that would make the loss contingency both probable and reasonably estimable. We believe that our accruals for legal proceedings are appropriate and, in the aggregate, are not material to our consolidated financial position, although future accruals could have a material effect on net income in a given period.

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STOCK INCENTIVE PLANS

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK INCENTIVE PLANS

STOCK INCENTIVE PLANS

Restricted Stock

We issue restricted stock awards, consisting of both restricted stock and restricted stock units, to key employees under our Incentive Compensation Plan (Plan). We issue time-based awards and performance-based awards under this Plan, both of which are based on a three-year vesting period. The grant date fair value of the time-based awards is equal to the price of our common stock on the grant date. The fair value of the performance-based awards is based on a Monte-Carlo simulation valuation of our common stock as of the grant date. The assumptions used for this valuation include stock price volatility, risk-free interest rate and dividend yield.

For performance-based restricted stock awards granted, the recipients will earn shares, totaling between 0% and 175% of the number of units issued, based on our total stockholder return relative to a specified peer group of financial institutions over the three-year period. These market-based restricted stock units are included in the table below as if the recipients earned shares equal to 100% of the units issued, regardless of the actual vesting percentages.

As of March 31, 2018, we had available up to 2,636,450 shares of common stock to issue under this Plan.

The unvested restricted stock awards are eligible to receive cash dividends or dividend equivalents which are ultimately used to purchase additional shares of stock and are subject to forfeiture if the requisite service period is not completed or the specified performance criteria are not met. These awards are subject to certain accelerated vesting provisions upon retirement, death, disability or in the event of a change of control as defined in the award agreements.

The following table summarizes the activity relating to restricted stock awards during the periods indicated:

	Three Months Ended March 31,
	2018				2017
	Awards		Weighted Average Grant Price per Share		Awards		Weighted Average Grant Price per Share
Unvested awards outstanding at beginning of period	1,975,862		$	13.64	1,836,363		$	12.97
Vested	(7,631	)	12.83		(243,982	)	11.83
Forfeited/expired	(19,893	)	14.02		(2,950	)	13.00
Dividend reinvestment	16,373		14.37		12,253		14.54
Unvested awards outstanding at end of period	1,964,711		13.65		1,601,684		13.16

The following table provides certain information related to restricted stock awards:

(in thousands)	Three Months Ended March 31,
	2018		2017
Stock-based compensation expense	$	1,939	$	1,760
Tax benefit related to stock-based compensation expense	407		616
Fair value of awards vested	110		3,802

As of March 31, 2018, there was $9.8 million of unrecognized compensation cost related to unvested restricted stock awards, including $0.6 million that is subject to accelerated vesting under the Plan’s immediate vesting upon retirement. The components of the restricted stock awards as of March 31, 2018 are as follows:

(dollars in thousands)	Service- Based Awards		Performance- Based Awards		Total
Unvested restricted stock awards	1,050,062		914,649		1,964,711
Unrecognized compensation expense	$	5,691	$	4,061	$	9,752
Intrinsic value	$	14,123	$	12,302	$	26,425
Weighted average remaining life (in years)	1.76		1.50		1.64

Stock Options

All outstanding stock options were assumed from acquisitions and are fully vested. Upon consummation of our acquisitions, all outstanding stock options issued by the acquired companies were converted into equivalent FNB stock options. We issue shares of treasury stock or authorized but unissued shares to satisfy stock options exercised.

The following table summarizes the activity relating to stock options during the periods indicated:

	Three Months Ended March 31,
	2018				2017
	Shares		Weighted Average Exercise Price per  Share		Shares		Weighted Average Exercise Price per  Share
Options outstanding at beginning of period	722,650		$	7.96	892,532		$	8.95
Assumed from acquisitions	—		—		207,645		8.92
Exercised	(163,035	)	7.79		(131,792	)	9.44
Forfeited/expired	(237	)	10.72		(49,281	)	10.91
Options outstanding and exercisable at end of period	559,378		8.03		919,104		8.77

The intrinsic value of outstanding and exercisable stock options at March 31, 2018 was $3.0 million. The aggregate intrinsic value represents the amount by which the fair value of underlying stock exceeds the option exercise price.

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RETIREMENT PLANS

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

RETIREMENT PLANS

RETIREMENT PLANS

Our subsidiaries participate in a qualified 401(k) defined contribution plan under which employees may contribute a percentage of their salary. Employees are eligible to participate upon their first day of employment. Under this plan, we match 100% of the first six percent that the employee defers. Additionally, we may provide a performance-based company contribution of up to three percent if we exceed annual financial goals. Our contribution expense is presented in the following table:

	Three Months Ended March 31,
(in thousands)	2018		2017
401(k) contribution expense	$	3,610	$	2,767

We also sponsor an Employee Retirement Income Security Act of 1974 (ERISA) Excess Lost Match Plan for certain officers. This plan provides retirement benefits equal to the difference, if any, between the maximum benefit allowable under the Internal Revenue Code and the amount that would have been provided under the qualified 401(k) defined contribution plan, if no limits were applied.

Additionally, we sponsor a qualified non-contributory defined benefit pension plan and two supplemental non-qualified retirement plans that have been frozen. The net periodic benefit credit for these plans includes the following components:

	Three Months Ended March 31,
(in thousands)	2018			2017
Service cost	$	(4	)	$	(4	)
Interest cost	1,560			1,477
Expected return on plan assets	(2,895		)	(2,427		)
Amortization:
Unrecognized prior service cost	—			2
Unrecognized loss	623			628
Net periodic pension credit	$	(716	)	$	(324	)

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INCOME TAXES

3 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

The TCJA includes several changes to existing U.S. tax laws that impact us, most notably a reduction of the U.S. corporate income tax rate from35%to21%, which became effective January 1, 2018. We recognized the initial income tax effects of the TCJA in our 2017 financial statements in accordance with Staff Accounting Bulletin No. 118, which provides SEC staff guidance for the application of ASC 740, Income Taxes, in the reporting period in which the TCJA was signed into law. As such, our financial results reflect the income tax effects of the TCJA for which the accounting under ASC 740 is complete, as well as for provisional amounts for those specific income tax effects under ASC 740 that are incomplete, but a reasonable estimate could be determined. We did not identify any items for which the income tax effects of the TCJA have not been completed and a reasonable estimate could not be determined as of December 31, 2017, which was our first reporting date after the TCJA enactment.Examples of unavailable or unanalyzed information for which we have provisional estimates include deferred taxes related to depreciation (including lease financing), partnership earnings, and realized built-in losses from a prior acquisition. These estimates are subject to change as additional data is gathered, as interpretations and guidance are received, and as the final analyses are completed. The measurement period ends when we have analyzed the information necessary to finalize our accounting, but cannot extend beyond one year from the TCJA enactment date.

Income Tax Expense

Federal and state income tax expense and the statutory tax rate and the actual effective tax rate consist of the following:

	Three Months Ended March 31,
(in thousands)	2018			2017
Current income taxes:
Federal taxes	$	17,700		$	6,688
State taxes	1,704			499
Total current income taxes	19,404			7,187
Deferred income taxes:
Federal taxes	1,902			1,690
State taxes	(38		)	(2,393		)
Total deferred income taxes	1,864			(703		)
Total income taxes	$	21,268		$	6,484
Statutory tax rate	21.0		%	35.0		%
Effective tax rate	19.7		%	22.0		%

The effective tax rate for the quarter ended March 31, 2018 under the 21% TCJA statutory federal tax rate was 19.7%. The effective tax rate for the quarter ended March 31, 2017 under the former 35% statutory federal tax rate was 22.0%. The effective tax rate for the quarter ended March 31, 2018 was lower than the statutory tax rate of 21% due to tax benefits resulting from tax-exempt income on investments, loans, tax credits and income from BOLI. The lower effective tax rate for the quarter ended March 31, 2017 primarily related to merger expenses from the Yadkin acquisition.

In the fourth quarter of 2017, we elected to change our accounting policy under ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) to reclassify the income tax effects related to the TCJA from AOCI to retained earnings.

Deferred Income Taxes

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and tax purposes. Deferred tax assets and liabilities are measured based on the enacted tax rates that will apply in the years in which the temporary differences are expected to be recovered or paid. As such, during December 2017, we remeasured our deferred tax assets and liabilities as a result of the passage of the TCJA. The primary impact of this remeasurement was a reduction in deferred tax assets and liabilities in connection with the reduction of the U.S. corporate income tax rate from 35% to 21%.

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OTHER COMPREHENSIVE INCOME

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

OTHER COMPREHENSIVE INCOME

OTHER COMPREHENSIVE INCOME

The following table presents changes in AOCI, net of tax, by component:

(in thousands)	Unrealized Net Losses on Debt Securities Available for Sale			Unrealized Net Gains (Losses) on Derivative Instruments			Unrecognized Pension and Postretirement Obligations			Total
Three Months Ended March 31, 2018
Balance at beginning of period	$	(29,626	)	$	5,407		$	(58,833	)	$	(83,052	)
Other comprehensive (loss) income before reclassifications	(29,787		)	3,804			484			(25,499		)
Amounts reclassified from AOCI	—			(173		)	—			(173		)
Net current period other comprehensive (loss) income	(29,787		)	3,631			484			(25,672		)
Balance at end of period	$	(59,413	)	$	9,038		$	(58,349	)	$	(108,724	)

The amounts reclassified from AOCI related to debt securities available for sale are included in net securities gains on the Consolidated Income Statements, while the amounts reclassified from AOCI related to derivative instruments are included in interest income on loans and leases on the Consolidated Income Statements.

The tax (benefit) expense amounts reclassified from AOCI in connection with the debt securities available for sale and derivative instruments reclassifications are included in income taxes on the Consolidated Statements of Income.

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EARNINGS PER COMMON SHARE

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE

Basic earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding net of unvested shares of restricted stock.

Diluted earnings per common share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding, adjusted for the dilutive effect of potential common shares issuable for stock options, warrants and restricted shares, as calculated using the treasury stock method. Adjustments to the weighted average number of shares of common stock outstanding are made only when such adjustments dilute earnings per common share.

The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended March 31,
(dollars in thousands, except per share data)	2018		2017
Net income	$	86,762	$	22,979
Less: Preferred stock dividends	2,010		2,010
Net income available to common stockholders	$	84,752	$	20,969
Basic weighted average common shares outstanding	323,740,956		237,379,260
Net effect of dilutive stock options, warrants and restricted stock	2,026,012		1,882,423
Diluted weighted average common shares outstanding	325,766,968		239,261,683
Earnings per common share:
Basic	$	0.26	$	0.09
Diluted	$	0.26	$	0.09

The following table shows the average shares excluded from the above calculation as their effect would have been anti-dilutive: 

	Three Months Ended March 31,
	2018	2017
Average shares excluded from the diluted earnings per common share calculation	21	81,755

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CASH FLOW INFORMATION

3 Months Ended

Mar. 31, 2018

Supplemental Cash Flow Elements [Abstract]

CASH FLOW INFORMATION

CASH FLOW INFORMATION

Following is a summary of supplemental cash flow information:

	Three Months Ended March 31,
	2018		2017
(in thousands)
Interest paid on deposits and other borrowings	$	46,540	$	18,606
Transfers of loans to other real estate owned	3,954		20,517

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BUSINESS SEGMENTS

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

BUSINESS SEGMENTS

BUSINESS SEGMENTS

We operate in four reportable segments: Community Banking, Wealth Management, Insurance and Consumer Finance.

• The Community Banking segment provides commercial and consumer banking services. Commercial banking solutions include corporate banking, small business banking, investment real estate financing, international banking, business credit, capital markets and lease financing. Consumer banking products and services include deposit products, mortgage lending, consumer lending and a complete suite of mobile and online banking services.

• The Wealth Management segment provides a broad range of personal and corporate fiduciary services including the administration of decedent and trust estates. In addition, it offers various alternative products, including securities brokerage and investment advisory services, mutual funds and annuities.

• The Insurance segment includes a full-service insurance agency offering all lines of commercial and personal insurance through major carriers. The Insurance segment also includes a reinsurer.

• The Consumer Finance segment primarily makes installment loans to individuals and purchases installment sales finance contracts from retail merchants. The Consumer Finance segment activity is funded through the sale of subordinated notes, which are issued by a wholly-owned subsidiary and guaranteed by us.

The following tables provide financial information for these segments of FNB. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of FNB, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments to reconcile to the Consolidated Financial Statements.

(in thousands)	Community Banking		Wealth Management		Insurance		Consumer Finance		Parent and Other			Consolidated
At or for the Three Months Ended March 31, 2018
Interest income	$	263,587	$	—	$	20	$	9,294	$	26		$	272,927
Interest expense	42,360		—		—		910		3,552			46,822
Net interest income	221,227		—		20		8,384		(3,526		)	226,105
Provision for credit losses	12,412		—		—		2,083		—			14,495
Non-interest income	53,312		11,002		4,303		638		(1,752		)	67,503
Non-interest expense (1)	148,667		8,278		3,711		5,230		979			166,865
Amortization of intangibles	4,105		61		52		—		—			4,218
Income tax expense (benefit)	21,720		589		124		474		(1,639		)	21,268
Net income (loss)	87,635		2,074		436		1,235		(4,618		)	86,762
Total assets	31,424,150		25,129		20,529		169,737		12,808			31,652,353
Total intangibles	2,315,127		10,128		12,075		1,809		—			2,339,139
At or for the Three Months Ended March 31, 2017
Interest income	$	185,381	$	—	$	20	$	9,902	$	(610	)	$	194,693
Interest expense	18,865		—		—		922		2,154			21,941
Net interest income	166,516		—		20		8,980		(2,764		)	172,752
Provision for credit losses	9,064		—		—		1,786		—			10,850
Non-interest income	40,716		9,549		4,325		710		(184		)	55,116
Non-interest expense (1)	168,283		7,540		3,315		5,231		88			184,457
Amortization of intangibles	2,982		61		55		—		—			3,098
Income tax expense (benefit)	6,311		711		347		1,067		(1,952		)	6,484
Net income (loss)	20,592		1,237		628		1,606		(1,084		)	22,979
Total assets	29,978,061		22,130		20,514		184,006		(14,016		)	30,190,695
Total intangibles	2,332,352		10,353		12,285		1,809		—			2,356,799

(1) Excludes amortization of intangibles, which is presented separately.

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FAIR VALUE MEASUREMENTS

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

Refer to Note 24 "Fair Value Measurements" to the Consolidated Financial Statements of the Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC on February 28, 2018 for a description of additional valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis. Assets and liabilities measured at fair value rarely transfer between Level 1 and Level 2 measurements. There were no such transfers during the three-month periods ended March 31, 2018 and 2017.

The following table presents the balances of assets and liabilities measured at fair value on a recurring basis:

(in thousands)	Level 1		Level 2		Level 3		Total
March 31, 2018
Assets Measured at Fair Value
Debt securities available for sale
U.S. government-sponsored entities	$	—	$	358,648	$	—	$	358,648
Residential mortgage-backed securities:
Agency mortgage-backed securities	—		1,671,573		—		1,671,573
Agency collateralized mortgage obligations	—		832,350		—		832,350
Non-agency collateralized mortgage obligations	—		1		—		1
Commercial mortgage-backed securities	—		39,213		—		39,213
States of the U.S. and political subdivisions	—		21,023		—		21,023
Other debt securities	—		4,655		—		4,655
Total debt securities available for sale	—		2,927,463		—		2,927,463
Loans held for sale	—		21,610		—		21,610
Marketable equity securities
Fixed income mutual fund	177		—		—		177
Financial services industry	—		944		—		944
Total marketable equity securities	177		944		—		1,121
Derivative financial instruments
Trading	—		18,683		—		18,683
Not for trading	—		229		1,380		1,609
Total derivative financial instruments	—		18,912		1,380		20,292
Total assets measured at fair value on a recurring basis	$	177	$	2,968,929	$	1,380	$	2,970,486
Liabilities Measured at Fair Value
Derivative financial instruments
Trading	$	—	$	47,930	$	—	$	47,930
Not for trading	—		3,957		5		3,962
Total derivative financial instruments	—		51,887		5		51,892
Total liabilities measured at fair value on a recurring basis	$	—	$	51,887	$	5	$	51,892

(in thousands)	Level 1		Level 2		Level 3		Total
December 31, 2017
Assets Measured at Fair Value
Debt securities available for sale
U.S. government-sponsored entities	$	—	$	343,942	$	—	$	343,942
Residential mortgage-backed securities:
Agency mortgage-backed securities	—		1,598,874		—		1,598,874
Agency collateralized mortgage obligations	—		794,957		—		794,957
Non-agency collateralized mortgage obligations	—		1		—		1
States of the U.S. and political subdivisions	—		21,093		—		21,093
Other debt securities	—		4,670		—		4,670
Total debt securities available for sale	—		2,763,537		—		2,763,537
Equity securities available for sale
Fixed income mutual fund	161		—		—		161
Financial services industry	—		864		—		864
Total equity securities available for sale	161		864		—		1,025
Total securities available for sale	161		2,764,401		—		2,764,562
Loans held for sale	—		56,458		—		56,458
Derivative financial instruments
Trading	—		28,453		—		28,453
Not for trading	—		500		1,594		2,094
Total derivative financial instruments	—		28,953		1,594		30,547
Total assets measured at fair value on a recurring basis	$	161	$	2,849,812	$	1,594	$	2,851,567
Liabilities Measured at Fair Value
Derivative financial instruments
Trading	$	—	$	26,953	$	—	$	26,953
Not for trading	—		2,239		5		2,244
Total derivative financial instruments	—		29,192		5		29,197
Total liabilities measured at fair value on a recurring basis	$	—	$	29,192	$	5	$	29,197

The following table presents additional information about assets measured at fair value on a recurring basis and for which we have utilized Level 3 inputs to determine fair value:

(in thousands)	Other Debt Securities			Equity Securities			Residential Non-Agency Collateralized Mortgage Obligations			Interest Rate Lock Commitments			Total
Three Months Ended March 31, 2018
Balance at beginning of period	$	—		$	—		$	—		$	1,594		$	1,594
Purchases, issuances, sales and settlements:
Purchases	—			—			—			1,380			1,380
Settlements	—			—			—			(1,594		)	(1,594		)
Balance at end of period	$	—		$	—		$	—		$	1,380		$	1,380
Year Ended December 31, 2017
Balance at beginning of period	$	—		$	492		$	894		$	—		$	1,386
Total gains (losses) – realized/unrealized:
Included in earnings	—			—			4			—			4
Included in other comprehensive income	—			86			(6		)	—			80
Accretion included in earnings	(1		)	—			1			—			—
Purchases, issuances, sales and settlements:
Purchases	12,048			—			—			1,594			13,642
Sales/redemptions	(12,047		)	—			(874		)	—			(12,921		)
Settlements	—			—			(19		)	(4,569		)	(4,588		)
Transfers from Level 3	—			(578		)	—			—			(578		)
Transfers into Level 3	—			—			—			4,569			4,569
Balance at end of period	$	—		$	—		$	—		$	1,594		$	1,594

We review fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation attributes may result in reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in/out of Level 3 at fair value at the beginning of the period in which the changes occur. There were no transfers of assets or liabilities between the hierarchy levels during the first three months of 2018. During the first quarter of 2017, we acquired $12.0 million in other debt securities from YDKN that are measured at Level 3. These securities were sold during the second quarter of 2017. During the first three months of 2017, we transferred equity securities totaling $0.6 million from Level 3 to Level 2, as a result of increased trading activity relating to these securities.

For the three months ended March 31, 2018, we recorded in earnings $0.5 million of unrealized gains relating to the adoption of ASU 2016-01 and market value adjustments on marketable equity securities. These unrealized gains included in earnings are in the other non-interest income line item in the consolidated statement of income. For the three months ended March 31, 2017, there were no gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held as of those dates. The total realized net securities gains included in earnings are in the net securities gains line item in the Consolidated Statements of Income.

In accordance with GAAP, from time to time, we measure certain assets at fair value on a non-recurring basis. These adjustments to fair value usually result from the application of the lower of cost or fair value accounting or write-downs of individual assets. Valuation methodologies used to measure these fair value adjustments were described in Note 24 "Fair Value Measurements" in our 2017 Form 10-K. For assets measured at fair value on a non-recurring basis still held at the balance sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios:

(in thousands)	Level 1		Level 2		Level 3		Total
March 31, 2018
Impaired loans	$	—	$	2,032	$	1,475	$	3,507
Other real estate owned	—		—		1,621		1,621
Other assets - SBA servicing asset	—		—		5,062		5,062
December 31, 2017
Impaired loans	$	—	$	2,813	$	1,297	$	4,110
Other real estate owned	—		10,513		10,823		21,336
Loans held for sale - SBA	—		—		36,432		36,432
Other assets - SBA servicing asset	—		—		5,058		5,058

Substantially all of the fair value amounts in the table above were estimated at a date during the three months or twelve months ended March 31, 2018 and December 31, 2017, respectively. Consequently, the fair value information presented is not necessarily as of the period’s end.

Impaired loans measured or re-measured at fair value on a non-recurring basis during the three months ended March 31, 2018 had a carrying amount of $3.5 million, which includes an allocated allowance for credit losses of $3.2 million. The allowance for credit losses includes a provision applicable to the current period fair value measurements of $2.7 million, which was included in the provision for credit losses for the three months ended March 31, 2018.

OREO with a carrying amount of $2.0 million was written down to $1.6 million, resulting in a loss of $0.4 million, which was included in earnings for the three months ended March 31, 2018.

Fair Value of Financial Instruments

The following methods and assumptions were used to estimate the fair value of each financial instrument:

Cash and Cash Equivalents, Accrued Interest Receivable and Accrued Interest Payable. For these short-term instruments, the carrying amount is a reasonable estimate of fair value.

Securities. For both securities AFS and securities HTM, fair value equals the quoted market price from an active market, if available, and is classified within Level 1. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities or pricing models, and is classified as Level 2. Where there is limited market activity or significant valuation inputs are unobservable, securities are classified within Level 3. Under current market conditions, assumptions used to determine the fair value of Level 3 securities have greater subjectivity due to the lack of observable market transactions.

Loans and Leases. The fair value of fixed rate loans and leases is estimated by discounting the future cash flows using the current rates at which similar loans and leases would be made to borrowers with similar credit ratings and for the same remaining maturities less an illiquidity discount, as the fair value measurement represents an exit price from a market participants' viewpoint. The fair value of variable and adjustable rate loans and leases approximates the carrying amount. Due to the significant judgment involved in evaluating credit quality, loans and leases are classified within Level 3 of the fair value hierarchy.

Loan Servicing Rights. For both MSRs and SBA servicing rights, both classified as Level 3 assets, fair value is determined using a discounted cash flow valuation method. These models use significant unobservable inputs including discount rates, prepayment rates and cost to service which have greater subjectivity due to the lack of observable market transactions.

Derivative Assets and Liabilities. See Note 24 "Fair Value Measurements" to the Consolidated Financial Statements of the Annual Report on Form 10-K for the year ended December 31, 2017 filed with the SEC on February 28, 2018 for a description of valuation methodologies for derivative assets and liabilities measured at fair value.

Deposits. The estimated fair value of demand deposits, savings accounts and certain money market deposits is the amount payable on demand at the reporting date because of the customers’ ability to withdraw funds immediately. The fair value of fixed-maturity deposits is estimated by discounting future cash flows using rates currently offered for deposits of similar remaining maturities.

Short-Term Borrowings. The carrying amounts for short-term borrowings approximate fair value for amounts that mature in 90 days or less. The fair value of subordinated notes is estimated by discounting future cash flows using rates currently offered.

Long-Term Borrowings. The fair value of long-term borrowings is estimated by discounting future cash flows based on the market prices for the same or similar issues or on the current rates offered to us for debt of the same remaining maturities.

Loan Commitments and Standby Letters of Credit. Estimates of the fair value of these off-balance sheet items were not made because of the short-term nature of these arrangements and the credit standing of the counterparties. Also, unfunded loan commitments relate principally to variable rate commercial loans, typically are non-binding, and fees are not normally assessed on these balances.

Nature of Estimates. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable to other financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Further, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different.

The fair values of our financial instruments are as follows:

					Fair Value Measurements
(in thousands)	Carrying Amount		Fair  Value		Level 1		Level 2		Level 3
March 31, 2018
Financial Assets
Cash and cash equivalents	$	386,329	$	386,329	$	386,329	$	—	$	—
Debt securities available for sale	2,927,463		2,927,463		—		2,927,463		—
Debt securities held to maturity	3,224,000		3,131,964		—		3,131,964		—
Net loans and leases, including loans held for sale	21,121,132		20,900,639		—		21,610		20,879,029
Loan servicing rights	35,853		41,878		—		—		41,878
Marketable equity securities	1,121		1,121		177		944		—
Derivative assets	20,292		20,292		—		18,912		1,380
Accrued interest receivable	95,082		95,082		95,082		—		—
Financial Liabilities
Deposits	22,497,089		22,441,017		17,755,830		4,685,187		—
Short-term borrowings	3,802,480		3,802,988		3,802,988		—		—
Long-term borrowings	659,890		663,085		—		—		663,085
Derivative liabilities	51,892		51,892		—		51,887		5
Accrued interest payable	12,762		12,762		12,762		—		—
December 31, 2017
Financial Assets
Cash and cash equivalents	$	479,443	$	479,443	$	479,443	$	—	$	—
Securities available for sale	2,764,562		2,764,562		161		2,764,401		—
Debt securities held to maturity	3,242,268		3,218,379		—		3,218,379		—
Net loans and leases, including loans held for sale	20,916,277		20,661,196		—		56,458		20,604,738
Loan servicing rights	34,111		37,758		—		—		37,758
Derivative assets	30,547		30,547		—		28,953		1,594
Accrued interest receivable	94,254		94,254		94,254		—		—
Financial Liabilities
Deposits	22,399,725		22,359,182		17,779,246		4,579,936		—
Short-term borrowings	3,678,337		3,678,723		3,678,723		—		—
Long-term borrowings	668,173		675,489		—		—		675,489
Derivative liabilities	29,197		29,197		—		29,192		5
Accrued interest payable	12,480		12,480		12,480		—		—

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

Our accompanying Consolidated Financial Statements and these Notes to the Financial Statements include subsidiaries in which we have a controlling financial interest. We own and operate FNBPA, First National Trust Company, First National Investment Services Company, LLC, F.N.B. Investment Advisors, Inc., First National Insurance Agency, LLC, Regency, Bank Capital Services, LLC and F.N.B. Capital Corporation, LLC, and include results for each of these entities in the accompanying Consolidated Financial Statements.

The accompanying Consolidated Financial Statements include all adjustments that are necessary, in the opinion of management, to fairly reflect our financial position and results of operations in accordance with U.S. generally accepted accounting principles. All significant intercompany balances and transactions have been eliminated. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on our net income and stockholders’ equity. Events occurring subsequent to the date of the March 31, 2018 Balance Sheet have been evaluated for potential recognition or disclosure in the Consolidated Financial Statements through the date of the filing of the Consolidated Financial Statements with the Securities and Exchange Commission.

Certain information and Note disclosures normally included in Consolidated Financial Statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. The interim operating results are not necessarily indicative of operating results FNB expects for the full year. These interim unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in FNB’s 2017 Annual Report on Form 10-K filed with the SEC on February 28, 2018. For a detailed description of our significant accounting policies, see Note 1 "Summary of Significant Accounting Policies" in the 2017 Form 10-K. The accounting policies presented below have been added or amended for newly material items or the adoption of new accounting standards.

Use of Estimates

Use of Estimates

Our accounting and reporting policies conform with GAAP. The preparation of Financial Statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying Notes. Actual results could materially differ from those estimates. Material estimates that are particularly susceptible to significant changes include the allowance for credit losses, accounting for acquired loans, fair value of financial instruments, goodwill and other intangible assets, income taxes and deferred tax assets and litigation.

Revenue from Contracts with Customers

Revenue from Contracts with Customers

We earn certain revenues from contracts with customers. These revenues are recognized when control of the promised services is transferred to the customers in an amount that reflects the consideration we expect to be entitled to in an exchange for those services.

In determining the appropriate revenue recognition for our contracts with customers, we consider whether the contract has commercial substance and is approved by both parties with identifiable contractual rights, payment terms, and the collectability of consideration is probable. Generally, we satisfy our performance obligations upon the completion of services at the amount to which we have the right to invoice or charge under contracts with an original expected duration of one year or less. We apply this guidance on a portfolio basis to contracts with similar characteristics and for which we believe the results would not differ materially from applying this guidance to individual contracts.

Our services provided under contracts with customers are transferred at the point in time when the services are rendered. Generally, we do not defer incremental direct costs to obtain contracts with customers that would be amortized in one year or less under the practical expedient. These costs are recognized as expense, primarily salary and benefit expense, in the period incurred.

Deposit Services.We recognize revenue on deposit services based on published fees for services provided. Demand and savings deposit customers have the right to cancel their depository arrangements and withdraw their deposited funds at any time without prior notice. When services involve deposited funds that can be retrieved by customers without penalties, we consider the service contract term to be day-to-day, where each day represents the renewal of the contract. The contract does not extend beyond the services performed and revenue is recognized at the end of the contract term (daily) as the performance obligation is satisfied.

No deposit services fees exist for long-term deposit products beyond early withdrawal penalties, which are earned on these products at the time of early termination.

Revenue from deposit services fees are reduced where we have a history of waived or reduced fees by customer request or due to a customer service issue, by historical experience, or another acceptable method in the same period as the related revenues. Revenues from deposit services are reported in the Consolidated Statements of Income as service charges and in the Community Banking segment as non-interest income.

Wealth Management Services.Wealth advisory and trust services are provided on a month-to-month basis and invoiced as services are rendered. Fees are based on a fixed amount or a scale based on the level of services provided or assets under management. The customer has the right to terminate their services agreement at any time. We determine the value of services performed based on the fee schedule in effect at the time the services are performed. Revenues from wealth advisory and trust services are reported in the Consolidated Statements of Income as trust services and securities commissions and fees, and in the Wealth segment as non-interest income.

Insurance Services.Insurance services include full-service insurance brokerage services offering numerous lines of commercial and personal insurance through major carriers to businesses and individuals within our geographic markets. We recognize revenue on insurance contracts in effect based on contractually specified commission payments on premiums that are paid by the customer to the insurance carrier. Contracts are cancellable at any time and we have no performance obligation to the customers beyond the time the insurance is placed into effect. Revenues from insurance services are reported in the Consolidated Statements of Income as insurance commissions and fees, and in the Insurance segment as non-interest income.

Debt Securities

Debt Securities

Debt securities comprise a significant portion of our Consolidated Balance Sheets. Such securities can be classified as trading, HTM or AFS. As of March 31, 2018 and 2017, we did not hold any trading debt securities.

Debt securities HTM are the securities that management has the positive intent and ability to hold until their maturity. Such securities are carried at cost, adjusted for related amortization of premiums and accretion of discounts through interest income from securities, and subject to evaluation for OTTI.

Debt securities that are not classified as trading or HTM are classified as AFS. Such securities are carried at fair value with net unrealized gains and losses deemed to be temporary and OTTI attributable to non-credit factors reported separately as a component of other comprehensive income, net of tax.

We evaluate our debt securities in a loss position for OTTI on a quarterly basis at the individual security level based on our intent to sell. If we intend to sell the debt security or it is more likely than not we will be required to sell the security before recovery of its amortized cost basis, OTTI must be recognized in earnings equal to the entire difference between the investments’ amortized cost basis and its fair value. If we do not intend to sell the debt security and it is not more likely than not that we will be required to sell the security before recovery of its amortized cost basis, OTTI must be separated into the amount representing credit loss and the amount related to all other market factors. The amount related to credit loss will be recognized in earnings. The amount related to other market factors will be recognized in other comprehensive income, net of applicable taxes.

We perform our OTTI evaluation process in a consistent and systematic manner and include an evaluation of all available evidence. This process considers factors such as length of time and anticipated recovery period of the impairment, recent events specific to the issuer and recent experience regarding principal and interest payments.

Low Income Housing Tax Credit Partnerships

Low Income Housing Tax Credit (LIHTC) Partnerships

We invest in various affordable housing projects that qualify for LIHTCs. The net investments are recorded in other assets on the Consolidated Balance Sheets. These investments generate a return through the realization of federal tax credits. We use the proportional amortization method to account for a majority of our investments in these entities. LIHTCs that do not meet the requirements of the proportional amortization method are recognized using the equity method.

New Accounting Standards

Standard	Description	Required Date of Adoption	Financial Statements Impact
Derivative and Hedging Activities
ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities	This Update improves the financial reporting of hedging to better align with a company’s risk management activities. In addition, this Update makes certain targeted improvements to simplify the application of the current hedge accounting guidance.	January 1, 2019 Early adoption is permitted.	This Update is to be applied using a modified retrospective method. The presentation and disclosure guidance are applied prospectively. We are currently assessing the potential impact to our Consolidated Financial Statements.
Securities
ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities	This Update shortens the amortization period for the premium on certain purchased callable securities to the earliest call date. The accounting for purchased callable debt securities held at a discount does not change.	January 1, 2019 Early adoption is permitted.	This Update is to be applied using a modified retrospective transition method. The adoption of this Update is not expected to have a material effect on our Consolidated Financial Statements.

Standard	Description	Required Date of Adoption	Financial Statements Impact
Retirement Benefits
ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	This Update requires that an employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allows only the service cost component of net benefit cost to be eligible for capitalization.	January 1, 2018	We adopted this Update in the first quarter of 2018 by a retrospective transition method. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.
Statement of Cash Flows
ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force)	This Update adds or clarifies guidance on eight cash flow issues.	January 1, 2018	We adopted this Update in the first quarter of 2018 by retrospective application. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.
Credit Losses
ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	This Update replaces the current incurred loss impairment methodology with a methodology that reflects current expected credit losses (commonly referred to as CECL) for most financial assets measured at amortized cost and certain other instruments, including loans, HTM debt securities, net investments in leases and off-balance sheet credit exposures. CECL requires loss estimates for the remaining life of the financial asset at the time the asset is originated or acquired, considering historical experience, current conditions and reasonable and supportable forecasts. In addition, the Update will require the use of a modified AFS debt security impairment model and eliminate the current accounting for purchased credit impaired loans and debt securities.	January 1, 2020 Early adoption is permitted for fiscal years beginning after December 15, 2018	This Update is to be applied using a cumulative-effect adjustment to retained earnings. The CECL model is a significant change from existing GAAP and may result in a material change to our accounting for financial instruments. We are reviewing our business processes, information systems and controls to support recognition and disclosures under this Update. This review includes an assessment of our existing credit models and the financial statement disclosure requirements. The impact of this Update will be dependent on the portfolio composition, credit quality and economic conditions at the time of adoption.
Extinguishments of Liabilities
ASU 2016-04, Liabilities - Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products (a consensus of the Emerging Issues Task Force)	This Update requires entities that sell prepaid stored-value products redeemable for goods, services or cash at third-party merchants to recognize breakage.	January 1, 2018	We adopted this Update in the first quarter of 2018. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.

Standard	Description	Required Date of Adoption	Financial Statements Impact
Leases
ASU 2016-02, Leases (Topic 842)	This Updaterequires lessees to put most leases on their balance sheets but recognize expenses in the income statement similar to current accounting. In addition, the Update changes the guidance for sale-leaseback transactions, initial direct costs and lease executory costs for most entities. All entities will classify leases to determine how to recognize lease related revenue and expense.	January 1, 2019 Early adoption is permitted.	This Update is to be applied using a modified retrospective application including a number of optional practical expedients. We are in the process of reviewing our existing lease portfolios, implementing a software solution and assessing the potential impact to our Consolidated Financial Statements.
Financial Instruments – Recognition and Measurement
ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities	This Update amends the presentation and accounting for certain financial instruments, including liabilities measured at fair value under the FVO, and equity investments. The guidance also updates fair value presentation and disclosure requirements for financial instruments measured at amortized cost.	January 1, 2018	We adopted this Update in the first quarter of 2018 by a cumulative-effect adjustment. The adoption of this Update did not have a material effect on our Consolidated Financial Statements. During the first quarter of 2018, we transferred marketable equity securities totaling $1.1 million from securities AFS to other assets.
Revenue Recognition
ASU 2014-09, Revenue from Contracts with Customers (Topic 606)	This Update modifies the guidance used to recognize revenue from contracts with customers for transfers of goods and services and transfers of nonfinancial assets, unless those contracts are within the scope of other guidance. The guidance also requires new qualitative and quantitative disclosures about contract balances and performance obligations.	January 1, 2018	We adopted this Update in the first quarter of 2018 under the modified retrospective method. The adoption of this Update did not have a material effect on our Consolidated Financial Statements.

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SECURITIES (Tables)

3 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of Amortized Cost and Fair Value of Securities Available for Sale

The amortized cost and fair value of securities are as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair  Value
Securities Available for Sale:
March 31, 2018
U.S. government-sponsored entities	$	364,600	$	—	$	(5,952	)	$	358,648
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,713,036		458		(41,921		)	1,671,573
Agency collateralized mortgage obligations	860,902		28		(28,580		)	832,350
Non-agency collateralized mortgage obligations	1		—		—			1
Commercial mortgage-backed securities	39,183		30		—			39,213
States of the U.S. and political subdivisions	21,138		3		(118		)	21,023
Other debt securities	4,916		—		(261		)	4,655
Total debt securities available for sale	$	3,003,776	$	519	$	(76,832	)	$	2,927,463
December 31, 2017
U.S. government-sponsored entities	$	347,767	$	52	$	(3,877	)	$	343,942
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,615,168		1,225		(17,519		)	1,598,874
Agency collateralized mortgage obligations	813,034		—		(18,077		)	794,957
Non-agency collateralized mortgage obligations	1		—		—			1
States of the U.S. and political subdivisions	21,151		6		(64		)	21,093
Other debt securities	4,913		—		(243		)	4,670
Total debt securities	2,802,034		1,283		(39,780		)	2,763,537
Equity securities	587		438		—			1,025
Total securities available for sale	$	2,802,621	$	1,721	$	(39,780	)	$	2,764,562

Schedule of Amortized Cost and Fair Value of Securities Held to Maturity

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair  Value
Debt Securities Held to Maturity:
March 31, 2018
U.S. Treasury	$	500	$	114	$	—		$	614
U.S. government-sponsored entities	247,272		81		(5,716		)	241,637
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,174,426		491		(27,472		)	1,147,445
Agency collateralized mortgage obligations	783,151		257		(29,971		)	753,437
Commercial mortgage-backed securities	79,476		32		(1,245		)	78,263
States of the U.S. and political subdivisions	939,175		2,483		(31,090		)	910,568
Total debt securities held to maturity	$	3,224,000	$	3,458	$	(95,494	)	$	3,131,964
December 31, 2017
U.S. Treasury	$	500	$	134	$	—		$	634
U.S. government-sponsored entities	247,310		93		(4,388		)	243,015
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,219,802		3,475		(9,058		)	1,214,219
Agency collateralized mortgage obligations	777,146		32		(20,095		)	757,083
Commercial mortgage-backed securities	80,786		414		(575		)	80,625
States of the U.S. and political subdivisions	916,724		13,209		(7,130		)	922,803
Total debt securities held to maturity	$	3,242,268	$	17,357	$	(41,246	)	$	3,218,379

Gross Gains and Gross Losses Realized on Sales of Securities

Gross gains and gross losses were realized on securities as follows:

	Three Months Ended March 31,
(in thousands)	2018		2017
Gross gains	$	—	$	3,400
Gross losses	—		(775		)
Net gains	$	—	$	2,625

Amortized Cost and Fair Value of Securities, by Contractual Maturities

As of March 31, 2018, the amortized cost and fair value of debt securities, by contractual maturities, were as follows:

	Available for Sale				Held to Maturity
(in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	65,814	$	65,498	$	45,461	$	45,221
Due from one to five years	262,236		256,811		210,014		204,580
Due from five to ten years	7,876		7,725		94,022		93,225
Due after ten years	54,728		54,292		837,450		809,793
	390,654		384,326		1,186,947		1,152,819
Residential mortgage-backed securities:
Agency mortgage-backed securities	1,713,036		1,671,573		1,174,426		1,147,445
Agency collateralized mortgage obligations	860,902		832,350		783,151		753,437
Non-agency collateralized mortgage obligations	1		1		—		—
Commercial mortgage-backed securities	39,183		39,213		79,476		78,263
Total debt securities	$	3,003,776	$	2,927,463	$	3,224,000	$	3,131,964

Schedule of Securities Pledged as Collateral

Following is information relating to securities pledged:

(dollars in thousands)	March 31, 2018			December 31, 2017
Securities pledged (carrying value):
To secure public deposits, trust deposits and for other purposes as required by law	$	3,532,023		$	3,491,634
As collateral for short-term borrowings	298,233			263,756
Securities pledged as a percent of total securities	62.3		%	62.5		%

Summaries of Fair Values and Unrealized Losses of Impaired Securities, Segregated by Length of Impairment

Following are summaries of the fair values and unrealized losses of temporarily impaired debt securities, segregated by length of impairment:

	Less than 12 Months						12 Months or More						Total
(dollars in thousands)	#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses
Debt Securities Available for Sale
March 31, 2018
U.S. government-sponsored entities	8	$	158,212	$	(1,389	)	10	$	200,436	$	(4,563	)	18	$	358,648	$	(5,952	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	59	1,212,767		(25,545		)	28	444,583		(16,376		)	87	1,657,350		(41,921		)
Agency collateralized mortgage obligations	16	470,878		(13,274		)	33	312,687		(15,306		)	49	783,565		(28,580		)
States of the U.S. and political subdivisions	7	11,434		(108		)	1	877		(10		)	8	12,311		(118		)
Other debt securities	—	—		—			3	4,655		(261		)	3	4,655		(261		)
Total temporarily impaired debt securities AFS	90	$	1,853,291	$	(40,316	)	75	$	963,238	$	(36,516	)	165	$	2,816,529	$	(76,832	)
December 31, 2017
U.S. government-sponsored entities	7	$	106,809	$	(363	)	10	$	201,485	$	(3,514	)	17	$	308,294	$	(3,877	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	43	976,738		(7,723		)	28	473,625		(9,796		)	71	1,450,363		(17,519		)
Agency collateralized mortgage obligations	14	409,005		(6,231		)	33	335,452		(11,846		)	47	744,457		(18,077		)
States of the U.S. and political subdivisions	7	11,254		(55		)	1	879		(9		)	8	12,133		(64		)
Other debt securities	—	—		—			3	4,670		(243		)	3	4,670		(243		)
Total temporarily impaired debt securities AFS	71	$	1,503,806	$	(14,372	)	75	$	1,016,111	$	(25,408	)	146	$	2,519,917	$	(39,780	)

	Less than 12 Months						12 Months or More						Total
(dollars in thousands)	#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses			#	Fair  Value		Unrealized Losses
Debt Securities Held to Maturity
March 31, 2018
U.S. government-sponsored entities	4	$	54,558	$	(465	)	10	$	184,750	$	(5,251	)	14	$	239,308	$	(5,716	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	73	935,246		(20,410		)	11	173,759		(7,062		)	84	1,109,005		(27,472		)
Agency collateralized mortgage obligations	16	267,299		(5,862		)	35	444,572		(24,109		)	51	711,871		(29,971		)
Commercial mortgage-backed securities	6	48,737		(637		)	3	19,909		(608		)	9	68,646		(1,245		)
States of the U.S. and political subdivisions	148	517,101		(16,245		)	37	112,879		(14,845		)	185	629,980		(31,090		)
Total temporarily impaired debt securities HTM	247	$	1,822,941	$	(43,619	)	96	$	935,869	$	(51,875	)	343	$	2,758,810	$	(95,494	)
December 31, 2017
U.S. government-sponsored entities	4	$	54,790	$	(239	)	10	$	185,851	$	(4,149	)	14	$	240,641	$	(4,388	)
Residential mortgage-backed securities:
Agency mortgage-backed securities	36	648,485		(4,855		)	11	183,989		(4,203		)	47	832,474		(9,058		)
Agency collateralized mortgage obligations	14	275,290		(1,701		)	35	473,257		(18,394		)	49	748,547		(20,095		)
Commercial mortgage-backed securities	3	26,399		(123		)	2	19,443		(452		)	5	45,842		(575		)
States of the U.S. and political subdivisions	16	56,739		(933		)	37	121,536		(6,197		)	53	178,275		(7,130		)
Total temporarily impaired debt securities HTM	73	$	1,061,703	$	(7,851	)	95	$	984,076	$	(33,395	)	168	$	2,045,779	$	(41,246	)

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LOANS AND LEASES (Tables)

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Summary of Loans and Leases, Net of Unearned Income

Following is a summary of loans and leases, net of unearned income:

(in thousands)	Originated Loans and Leases		Acquired Loans		Total Loans and Leases
March 31, 2018
Commercial real estate	$	5,465,150	$	3,346,325	$	8,811,475
Commercial and industrial	3,688,120		591,849		4,279,969
Commercial leases	279,582		—		279,582
Other	39,347		—		39,347
Total commercial loans and leases	9,472,199		3,938,174		13,410,373
Direct installment	1,737,242		134,397		1,871,639
Residential mortgages	2,131,338		630,763		2,762,101
Indirect installment	1,524,330		171		1,524,501
Consumer lines of credit	1,135,488		558,295		1,693,783
Total consumer loans	6,528,398		1,323,626		7,852,024
Total loans and leases, net of unearned income	$	16,000,597	$	5,261,800	$	21,262,397
December 31, 2017
Commercial real estate	$	5,174,783	$	3,567,081	$	8,741,864
Commercial and industrial	3,495,247		675,420		4,170,667
Commercial leases	266,720		—		266,720
Other	17,063		—		17,063
Total commercial loans and leases	8,953,813		4,242,501		13,196,314
Direct installment	1,755,713		149,822		1,905,535
Residential mortgages	2,036,226		666,465		2,702,691
Indirect installment	1,448,268		165		1,448,433
Consumer lines of credit	1,151,470		594,323		1,745,793
Total consumer loans	6,391,677		1,410,775		7,802,452
Total loans and leases, net of unearned income	$	15,345,490	$	5,653,276	$	20,998,766

Certain Information Relating to Commercial Real Estate Loans

The following table shows certain information relating to commercial real estate loans:

(dollars in thousands)	March 31, 2018			December 31, 2017
Commercial construction, acquisition and development loans	$	1,167,699		$	1,170,175
Percent of total loans and leases	5.5		%	5.6		%
Commercial real estate:
Percent owner-occupied	35.2		%	35.3		%
Percent non-owner-occupied	64.8		%	64.7		%

Summary of Outstanding Principal Balance and Carrying Amount of Acquired Loans

The outstanding balance and the carrying amount of acquired loans included in the Consolidated Balance Sheets are as follows:

(in thousands)	March 31, 2018		December 31, 2017
Accounted for under ASC 310-30:
Outstanding balance	$	4,853,516	$	5,176,015
Carrying amount	4,521,926		4,834,256
Accounted for under ASC 310-20:
Outstanding balance	754,251		835,130
Carrying amount	733,037		812,322
Total acquired loans:
Outstanding balance	5,607,767		6,011,145
Carrying amount	5,254,963		5,646,578

Summary of Change in Accretable Yield of Acquired Loans

The following table provides changes in accretable yield for all acquired loans accounted for under ASC 310-30. Loans accounted for under ASC 310-20 are not included in this table.

	Three Months Ended March 31,
(in thousands)	2018			2017
Balance at beginning of period	$	708,481		$	467,070
Acquisitions	—			443,261
Reduction due to unexpected early payoffs	(25,833		)	(20,560		)
Reclass from non-accretable difference	64,216			23,106
Disposals/transfers	(57		)	(36		)
Other	(403		)	—
Accretion	(59,079		)	(25,241		)
Balance at end of period	$	687,325		$	887,600

Summary of Non-Performing Assets

Following is a summary of non-performing assets:

(dollars in thousands)	March 31, 2018			December 31, 2017
Non-accrual loans	$	77,684		$	74,635
Troubled debt restructurings	24,452			23,481
Total non-performing loans	102,136			98,116
Other real estate owned	40,980			40,606
Total non-performing assets	$	143,116		$	138,722
Asset quality ratios:
Non-performing loans / total loans and leases	0.48		%	0.47		%
Non-performing loans + OREO / total loans and leases + OREO	0.67		%	0.66		%
Non-performing assets / total assets	0.45		%	0.44		%

Age Analysis of Past Due Loans, by Class

The following tables provide an analysis of the aging of loans by class segregated by loans and leases originated and loans acquired:

(in thousands)	30-89 Days Past Due		>90 Days Past Due and Still Accruing		Non- Accrual		Total Past Due		Current		Total Loans and Leases
Originated Loans and Leases
March 31, 2018
Commercial real estate	$	8,345	$	1	$	27,349	$	35,695	$	5,429,455	$	5,465,150
Commercial and industrial	6,793		3		19,705		26,501		3,661,619		3,688,120
Commercial leases	692		—		1,399		2,091		277,491		279,582
Other	183		73		1,000		1,256		38,091		39,347
Total commercial loans and leases	16,013		77		49,453		65,543		9,406,656		9,472,199
Direct installment	8,129		3,913		8,411		20,453		1,716,789		1,737,242
Residential mortgages	14,870		1,982		5,254		22,106		2,109,232		2,131,338
Indirect installment	6,850		511		2,234		9,595		1,514,735		1,524,330
Consumer lines of credit	4,550		821		2,769		8,140		1,127,348		1,135,488
Total consumer loans	34,399		7,227		18,668		60,294		6,468,104		6,528,398
Total originated loans and leases	$	50,412	$	7,304	$	68,121	$	125,837	$	15,874,760	$	16,000,597
December 31, 2017
Commercial real estate	$	8,273	$	1	$	24,773	$	33,047	$	5,141,736	$	5,174,783
Commercial and industrial	8,948		3		17,077		26,028		3,469,219		3,495,247
Commercial leases	1,382		41		1,574		2,997		263,723		266,720
Other	83		153		1,000		1,236		15,827		17,063
Total commercial loans and leases	18,686		198		44,424		63,308		8,890,505		8,953,813
Direct installment	13,192		4,466		8,896		26,554		1,729,159		1,755,713
Residential mortgages	14,096		2,832		5,771		22,699		2,013,527		2,036,226
Indirect installment	10,313		611		2,240		13,164		1,435,104		1,448,268
Consumer lines of credit	5,859		1,014		2,313		9,186		1,142,284		1,151,470
Total consumer loans	43,460		8,923		19,220		71,603		6,320,074		6,391,677
Total originated loans and leases	$	62,146	$	9,121	$	63,644	$	134,911	$	15,210,579	$	15,345,490

(in thousands)	30-89 Days Past Due		>90 Days Past Due and Still Accruing		Non- Accrual		Total Past Due (1) (2)		Current		(Discount) Premium			Total Loans
Acquired Loans
March 31, 2018
Commercial real estate	$	32,697	$	64,550	$	3,735	$	100,982	$	3,433,231	$	(187,888	)	$	3,346,325
Commercial and industrial	5,135		4,617		4,652		14,404		612,354		(34,909		)	591,849
Total commercial loans	37,832		69,167		8,387		115,386		4,045,585		(222,797		)	3,938,174
Direct installment	2,826		1,746		—		4,572		128,754		1,071			134,397
Residential mortgages	15,113		13,059		—		28,172		642,966		(40,375		)	630,763
Indirect installment	—		1		—		1		7		163			171
Consumer lines of credit	5,357		2,139		1,176		8,672		561,906		(12,283		)	558,295
Total consumer loans	23,296		16,945		1,176		41,417		1,333,633		(51,424		)	1,323,626
Total acquired loans	$	61,128	$	86,112	$	9,563	$	156,803	$	5,379,218	$	(274,221	)	$	5,261,800
December 31, 2017
Commercial real estate	$	34,928	$	63,092	$	3,975	$	101,995	$	3,657,152	$	(192,066	)	$	3,567,081
Commercial and industrial	3,187		6,452		5,663		15,302		698,265		(38,147		)	675,420
Total commercial loans	38,115		69,544		9,638		117,297		4,355,417		(230,213		)	4,242,501
Direct installment	5,267		2,013		—		7,280		141,386		1,156			149,822
Residential mortgages	17,191		15,139		—		32,330		675,499		(41,364		)	666,465
Indirect installment	—		1		—		1		10		154			165
Consumer lines of credit	6,353		3,253		1,353		10,959		596,298		(12,934		)	594,323
Total consumer loans	28,811		20,406		1,353		50,570		1,413,193		(52,988		)	1,410,775
Total acquired loans	$	66,926	$	89,950	$	10,991	$	167,867	$	5,768,610	$	(283,201	)	$	5,653,276

(1) Past due information for acquired loans is based on the contractual balance outstanding at March 31, 2018 and December 31, 2017.

(2) Acquired loans are considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if we can reasonably estimate the timing and amount of expected cash flows on such loans. In these instances, we do not consider acquired contractually delinquent loans to be non-accrual or non-performing and continue to recognize interest income on these loans using the accretion method. Acquired loans are considered non-accrual or non-performing when, due to credit deterioration or other factors, we determine we are no longer able to reasonably estimate the timing and amount of expected cash flows on such loans. We do not recognize interest income on acquired loans considered non-accrual or non-performing.

Summary of Commercial Loans by Credit Quality

The following tables present a summary of our commercial loans and leases by credit quality category, segregated by loans and leases originated and loans acquired:

	Commercial Loan and Lease Credit Quality Categories
(in thousands)	Pass		Special Mention		Substandard		Doubtful		Total
Originated Loans and Leases
March 31, 2018
Commercial real estate	$	5,195,183	$	148,120	$	121,542	$	305	$	5,465,150
Commercial and industrial	3,412,745		191,627		80,803		2,945		3,688,120
Commercial leases	269,837		3,518		6,227		—		279,582
Other	38,231		43		1,073		—		39,347
Total originated commercial loans and leases	$	8,915,996	$	343,308	$	209,645	$	3,250	$	9,472,199
December 31, 2017
Commercial real estate	$	4,922,872	$	152,744	$	98,728	$	439	$	5,174,783
Commercial and industrial	3,266,966		132,975		92,091		3,215		3,495,247
Commercial leases	260,235		4,425		2,060		—		266,720
Other	15,866		43		1,154		—		17,063
Total originated commercial loans and leases	$	8,465,939	$	290,187	$	194,033	$	3,654	$	8,953,813
Acquired Loans
March 31, 2018
Commercial real estate	$	2,877,345	$	225,364	$	243,402	$	214	$	3,346,325
Commercial and industrial	520,361		28,166		43,314		8		591,849
Total acquired commercial loans	$	3,397,706	$	253,530	$	286,716	$	222	$	3,938,174
December 31, 2017
Commercial real estate	$	3,102,788	$	250,987	$	213,089	$	217	$	3,567,081
Commercial and industrial	603,611		26,059		45,661		89		675,420
Total acquired commercial loans	$	3,706,399	$	277,046	$	258,750	$	306	$	4,242,501

Summary of Consumer Loans by Payment Status

Following is a table showing consumer loans by payment status:

	Consumer Loan Credit Quality by Payment Status
(in thousands)	Performing		Non- Performing		Total
Originated loans
March 31, 2018
Direct installment	$	1,721,589	$	15,653	$	1,737,242
Residential mortgages	2,115,204		16,134		2,131,338
Indirect installment	1,521,906		2,424		1,524,330
Consumer lines of credit	1,130,978		4,510		1,135,488
Total originated consumer loans	$	6,489,677	$	38,721	$	6,528,398
December 31, 2017
Direct installment	$	1,739,060	$	16,653	$	1,755,713
Residential mortgages	2,019,816		16,410		2,036,226
Indirect installment	1,445,833		2,435		1,448,268
Consumer lines of credit	1,147,576		3,894		1,151,470
Total originated consumer loans	$	6,352,285	$	39,392	$	6,391,677
Acquired loans
March 31, 2018
Direct installment	$	134,327	$	70	$	134,397
Residential mortgages	630,763		—		630,763
Indirect installment	171		—		171
Consumer lines of credit	556,633		1,662		558,295
Total acquired consumer loans	$	1,321,894	$	1,732	$	1,323,626
December 31, 2017
Direct installment	$	149,751	$	71	$	149,822
Residential mortgages	666,465		—		666,465
Indirect installment	165		—		165
Consumer lines of credit	592,384		1,939		594,323
Total acquired consumer loans	$	1,408,765	$	2,010	$	1,410,775

Summary of Impaired Loans and Leases, by Class

Following is a summary of information pertaining to originated loans and leases considered to be impaired, by class of loan and lease:

(in thousands)	Unpaid Contractual Principal Balance		Recorded Investment With No Specific Reserve		Recorded Investment With Specific Reserve		Total Recorded Investment		Specific Reserve		Average Recorded Investment
At or for the Three Months Ended March 31, 2018
Commercial real estate	$	30,584	$	25,478	$	1,751	$	27,229	$	305	$	25,988
Commercial and industrial	26,034		15,859		5,007		20,866		2,945		20,479
Commercial leases	1,399		1,399		—		1,399		—		1,486
Other	—		—		—		—		—		—
Total commercial loans and leases	58,017		42,736		6,758		49,494		3,250		47,953
Direct installment	18,623		15,653		—		15,653		—		16,153
Residential mortgages	17,448		16,134		—		16,134		—		16,272
Indirect installment	4,648		2,424		—		2,424		—		2,429
Consumer lines of credit	5,698		4,510		—		4,510		—		4,202
Total consumer loans	46,417		38,721		—		38,721		—		39,056
Total	$	104,434	$	81,457	$	6,758	$	88,215	$	3,250	$	87,009
At or for the Year Ended December 31, 2017
Commercial real estate	$	27,718	$	21,748	$	2,906	$	24,654	$	439	$	24,413
Commercial and industrial	29,307		11,595		4,457		16,052		3,215		23,907
Commercial leases	1,574		1,574		—		1,574		—		1,386
Other	—		—		—		—		—		—
Total commercial loans and leases	58,599		34,917		7,363		42,280		3,654		49,706
Direct installment	19,375		16,653		—		16,653		—		16,852
Residential mortgages	17,754		16,410		—		16,410		—		15,984
Indirect installment	5,709		2,435		—		2,435		—		2,279
Consumer lines of credit	5,039		3,894		—		3,894		—		3,815
Total consumer loans	47,877		39,392		—		39,392		—		38,930
Total	$	106,476	$	74,309	$	7,363	$	81,672	$	3,654	$	88,636

Additional Allowance for Credit Losses Relating to Acquired Loans

Following is a summary of the allowance for credit losses required for acquired loans due to changes in credit quality subsequent to the acquisition date:

(in thousands)	March 31, 2018			December 31, 2017
Commercial real estate	$	2,732		$	4,976
Commercial and industrial	1,785			(415		)
Total commercial loans	4,517			4,561
Direct installment	1,804			1,553
Residential mortgages	518			484
Indirect installment	240			177
Consumer lines of credit	(242		)	(77		)
Total consumer loans	2,320			2,137
Total allowance on acquired loans	$	6,837		$	6,698

Summary of the composition of total TDRs

Following is a summary of the composition of total TDRs:

(in thousands)	Originated		Acquired		Total
March 31, 2018
Accruing:
Performing	$	19,525	$	249	$	19,774
Non-performing	21,283		3,169		24,452
Non-accrual	10,668		357		11,025
Total TDRs	$	51,476	$	3,775	$	55,251
December 31, 2017
Accruing:
Performing	$	19,538	$	266	$	19,804
Non-performing	20,173		3,308		23,481
Non-accrual	10,472		234		10,706
Total TDRs	$	50,183	$	3,808	$	53,991

Reserve for Commercial TDRs Included in Allowance for Credit Losses

The reserve for commercial TDRs included in the allowance for credit losses is presented in the following table:

(in thousands)	March 31, 2018		December 31, 2017
Specific reserves for commercial TDRs	$	726	$	95
Pooled reserves for individual commercial loans	519		469

Summary of Troubled Debt Restructurings by Class of Loans

Following is a summary of TDR loans, by class:

	Three Months Ended March 31, 2018
(dollars in thousands)	Number of Contracts	Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment
Commercial real estate	1	$	328	$	328
Commercial and industrial	1	1,687		1,230
Total commercial loans	2	2,015		1,558
Direct installment	182	1,135		1,056
Residential mortgages	11	501		504
Indirect installment	9	13		12
Consumer lines of credit	21	352		287
Total consumer loans	223	2,001		1,859
Total	225	$	4,016	$	3,417

	Three Months Ended March 31, 2017
(dollars in thousands)	Number of Contracts	Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment
Commercial real estate	1	$	114	$	109
Commercial and industrial	—	—		—
Total commercial loans	1	114		109
Direct installment	171	1,488		1,412
Residential mortgages	8	163		176
Indirect installment	5	17		14
Consumer lines of credit	22	742		729
Total consumer loans	206	2,410		2,331
Total	207	$	2,524	$	2,440

Summary of Originated Troubled Debt Restructurings by Class of Loans and Leases, Payment Default

Following is a summary of originated TDRs, by class, for which there was a payment default, excluding loans that were either charged-off or cured by period end. Default occurs when a loan is 90 days or more past due and is within 12 months of restructuring.

	Three Months Ended March 31, 2018
(dollars in thousands)	Number of Contracts	Recorded Investment
Direct installment	45	$	130
Residential mortgages	4	190
Indirect installment	5	10
Consumer lines of credit	1	196
Total consumer loans	55	526
Total	55	$	526

	Three Months Ended March 31, 2017
(dollars in thousands)	Number of Contracts	Recorded Investment
Direct installment	29	$	82
Residential mortgages	2	224
Indirect installment	6	10
Consumer lines of credit	1	34
Total consumer loans	38	350
Total	38	$	350

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ALLOWANCE FOR CREDIT LOSSES (Tables)

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Summary of Changes in Allowance for Credit Losses by Loan and Lease Class

Following is a summary of changes in the allowance for credit losses, by loan and lease class:

(in thousands)	Balance at Beginning of Period		Charge- Offs			Recoveries		Net Charge- Offs			Provision for Credit Losses			Balance at End of Period
Three Months Ended March 31, 2018
Commercial real estate	$	50,281	$	(225	)	$	337	$	112		$	3,123		$	53,516
Commercial and industrial	51,963		(5,920		)	369		(5,551		)	6,601			53,013
Commercial leases	5,646		(171		)	10		(161		)	630			6,115
Other	1,843		(797		)	297		(500		)	652			1,995
Total commercial loans and leases	109,733		(7,113		)	1,013		(6,100		)	11,006			114,639
Direct installment	20,936		(3,470		)	440		(3,030		)	2,222			20,128
Residential mortgages	15,507		(79		)	91		12			(239		)	15,280
Indirect installment	11,967		(2,409		)	895		(1,514		)	1,502			11,955
Consumer lines of credit	10,539		(531		)	121		(410		)	279			10,408
Total consumer loans	58,949		(6,489		)	1,547		(4,942		)	3,764			57,771
Total allowance on originated loans and leases	168,682		(13,602		)	2,560		(11,042		)	14,770			172,410
Purchased credit-impaired loans	635		—			—		—			(13		)	622
Other acquired loans	6,063		(309		)	723		414			(262		)	6,215
Total allowance on acquired loans	6,698		(309		)	723		414			(275		)	6,837
Total allowance for credit losses	$	175,380	$	(13,911	)	$	3,283	$	(10,628	)	$	14,495		$	179,247

(in thousands)	Balance at Beginning of Period		Charge- Offs			Recoveries		Net Charge- Offs			Provision for Credit Losses			Balance at End of Period
Three Months Ended March 31, 2017
Commercial real estate	$	46,635	$	(988	)	$	361	$	(627	)	$	381		$	46,389
Commercial and industrial	47,991		(2,463		)	474		(1,989		)	7,568			53,570
Commercial leases	3,280		(506		)	1		(505		)	738			3,513
Other	1,392		(973		)	327		(646		)	1,063			1,809
Total commercial loans and leases	99,298		(4,930		)	1,163		(3,767		)	9,750			105,281
Direct installment	21,391		(2,874		)	628		(2,246		)	1,065			20,210
Residential mortgages	10,082		(180		)	161		(19		)	147			10,210
Indirect installment	10,564		(2,370		)	781		(1,589		)	655			9,630
Consumer lines of credit	9,456		(458		)	165		(293		)	(280		)	8,883
Total consumer loans	51,493		(5,882		)	1,735		(4,147		)	1,587			48,933
Total allowance on originated loans and leases	150,791		(10,812		)	2,898		(7,914		)	11,337			154,214
Purchased credit-impaired loans	572		—			—		—			88			660
Other acquired loans	6,696		(482		)	269		(213		)	(575		)	5,908
Total allowance on acquired loans	7,268		(482		)	269		(213		)	(487		)	6,568
Total allowance for credit losses	$	158,059	$	(11,294	)	$	3,167	$	(8,127	)	$	10,850		$	160,782

Summary of Individual and Collective Allowance for Credit Losses and Loan and Lease Balances by Class

Following is a summary of the individual and collective originated allowance for credit losses and corresponding originated loan and lease balances by class:

	Originated Allowance				Originated Loans and Leases Outstanding
(in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Loans and Leases		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
March 31, 2018
Commercial real estate	$	305	$	53,211	$	5,465,150	$	12,292	$	5,452,858
Commercial and industrial	2,945		50,068		3,688,120		10,880		3,677,240
Commercial leases	—		6,115		279,582		—		279,582
Other	—		1,995		39,347		—		39,347
Total commercial loans and leases	3,250		111,389		9,472,199		23,172		9,449,027
Direct installment	—		20,128		1,737,242		—		1,737,242
Residential mortgages	—		15,280		2,131,338		—		2,131,338
Indirect installment	—		11,955		1,524,330		—		1,524,330
Consumer lines of credit	—		10,408		1,135,488		—		1,135,488
Total consumer loans	—		57,771		6,528,398		—		6,528,398
Total	$	3,250	$	169,160	$	16,000,597	$	23,172	$	15,977,425
December 31, 2017
Commercial real estate	$	439	$	49,842	$	5,174,783	$	11,114	$	5,163,669
Commercial and industrial	3,215		48,748		3,495,247		9,872		3,485,375
Commercial leases	—		5,646		266,720		—		266,720
Other	—		1,843		17,063		—		17,063
Total commercial loans and leases	3,654		106,079		8,953,813		20,986		8,932,827
Direct installment	—		20,936		1,755,713		—		1,755,713
Residential mortgages	—		15,507		2,036,226		—		2,036,226
Indirect installment	—		11,967		1,448,268		—		1,448,268
Consumer lines of credit	—		10,539		1,151,470		—		1,151,470
Total consumer loans	—		58,949		6,391,677		—		6,391,677
Total	$	3,654	$	165,028	$	15,345,490	$	20,986	$	15,324,504

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LOAN SERVICING (Tables)

3 Months Ended

Mar. 31, 2018

Mortgage Servicing Rights [Member]

Servicing Assets at Fair Value [Line Items]

Servicing Asset at Amortized Cost

The unpaid principal balance of mortgage loans serviced for others, as of March 31, 2018 and December 31, 2017, is listed below:

(in thousands)	March 31, 2018		December 31, 2017
Mortgage loans sold with servicing retained	$	3,417,642	$	3,256,548

The following table summarizes activity relating to mortgage loans sold with servicing retained:

	Three Months Ended March 31,
(in thousands)	2018		2017
Mortgage loans sold with servicing retained	$	236,893	$	129,843
Pretax gains resulting from above loan sales (1)	3,798		3,638
Mortgage servicing fees (1)	2,174		1,603

(1) Recorded in mortgage banking operations.

Following is a summary of the MSR activity:

	Three Months Ended March 31,
(in thousands)	2018			2017
Balance at beginning of period	$	29,053		$	13,521
Fair value of MSRs acquired	—			8,553
Additions	2,710			1,454
Payoffs and curtailments	(405		)	(139		)
Amortization	(567		)	(523		)
Balance at end of period	$	30,791		$	22,866
Fair value, beginning of period	$	32,419		$	17,546
Fair value, end of period	36,445			26,962

Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement

Following is a summary of the sensitivity of the fair value of MSRs to changes in key assumptions:

(dollars in thousands)	March 31, 2018			December 31, 2017
Weighted average life (months)	84.5			80.4
Constant prepayment rate (annualized)	9.1		%	9.9		%
Discount rate	9.9		%	9.9		%
Effect on fair value due to change in interest rates:
+0.25%	$	1,179		$	1,737
+0.50%	2,131			3,220
-0.25%	(1,476		)	(1,937		)
-0.50%	(3,237		)	(4,007		)

SBA-Guaranteed Loan Servicing [Member]

Servicing Assets at Fair Value [Line Items]

Servicing Asset at Amortized Cost

The unpaid principal balance of SBA-guaranteed loans serviced for investors, as of March 31, 2018 and December 31, 2017, was as follows:

(in thousands)	March 31, 2018		December 31, 2017
SBA loans sold to investors with servicing retained	$	300,857	$	305,977

The following table summarizes activity relating to SBA loans sold with servicing retained:

	Three Months Ended March 31,
(in thousands)	2018		2017
SBA loans sold with servicing retained	$	12,288	$	—
Pretax gains resulting from above loan sales (1)	1,101		—
SBA servicing fees (1)	750		115

(1) Recorded in non-interest income.

Following is a summary of the activity in SBA servicing rights:

	Three Months Ended March 31,
(in thousands)	2017			2017
Balance at beginning of period	$	5,058		$	—
Fair value of servicing rights acquired	—			5,399
Additions	388			—
Impairment (charge) / recovery	(90		)	—
Amortization	(294		)	(60		)
Balance at end of period	$	5,062		$	5,339
Fair value, beginning of period	$	5,058		$	—
Fair value, end of period	5,062			5,339

Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement

Following is a summary of key assumptions and the sensitivity of the SBA loan servicing rights to changes in these assumptions:

	March 31, 2018														December 31, 2017
			Decline in fair value due to														Decline in fair value due to
(dollars in thousands)	Actual		10% adverse change			20% adverse change			1% adverse change			2% adverse change			Actual		10% adverse change			20% adverse change			1% adverse change			2% adverse change
Weighted-average life (months)	61.0														63.5
Constant prepayment rate (annualized)	10.01	%	$	(158	)	$	(309	)	$	—		$	—		9.29	%	$	(145	)	$	(284	)	$	—		$	—
Discount rate	14.76		—			—			(148		)	(287		)	14.87		—			—			(147		)	(286		)

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BORROWINGS (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Summary of Short-Term Borrowings

Following is a summary of short-term borrowings:

(in thousands)	March 31, 2018		December 31, 2017
Securities sold under repurchase agreements	$	280,492	$	256,017
Federal Home Loan Bank advances	1,555,000		2,285,000
Federal funds purchased	1,830,000		1,000,000
Subordinated notes	136,988		137,320
Total short-term borrowings	$	3,802,480	$	3,678,337

Summary of Long-Term Borrowings

Following is a summary of long-term borrowings:

(in thousands)	March 31, 2018		December 31, 2017
Federal Home Loan Bank advances	$	300,053	$	310,061
Subordinated notes	89,523		87,614
Junior subordinated debt	110,466		110,347
Other subordinated debt	159,848		160,151
Total long-term borrowings	$	659,890	$	668,173

Junior Subordinated Debt Trusts

The following table provides information relating to the Trusts as of March 31, 2018:

(dollars in thousands)	Trust Preferred Securities		Common Securities		Junior Subordinated Debt		Stated Maturity Date	Interest Rate		Rate Reset Factor
F.N.B. Statutory Trust II	$	21,500	$	665	$	22,165	6/15/2036	3.77	%	LIBOR + 165 basis points (bps)
Omega Financial Capital Trust I	26,000		1,114		26,483		10/18/2034	3.92	%	LIBOR + 219 bps
Yadkin Valley Statutory Trust I	25,000		774		20,925		12/15/2037	3.44	%	LIBOR + 132 bps
FNB Financial Services Capital Trust I	25,000		774		21,859		9/30/2035	3.79	%	LIBOR + 146 bps
American Community Capital Trust II	10,000		310		10,446		12/15/2033	5.11	%	LIBOR + 280 bps
Crescent Financial Capital Trust I	8,000		248		8,588		10/7/2033	4.82	%	LIBOR + 310 bps
Total	$	115,500	$	3,885	$	110,466

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Schedule of Notional Amounts and Gross Fair Values of Derivative Assets and Derivative Liabilities

The following table presents notional amounts and gross fair values of our derivative assets and derivative liabilities which are not offset in the balance sheet.

	March 31, 2018						December 31, 2017
	Notional		Fair Value				Notional		Fair Value
(in thousands)	Amount		Asset		Liability		Amount		Asset		Liability
Gross Derivatives
Subject to master netting arrangements:
Interest rate contracts – designated	$	705,000	$	—	$	3,662	$	705,000	$	228	$	1,982
Interest rate swaps – not designated	2,422,236		3,481		9,117		2,245,442		1,169		11,599
Equity contracts – not designated	1,180		26		—		1,180		51		—
Total subject to master netting arrangements	3,128,416		3,507		12,779		2,951,622		1,448		13,581
Not subject to master netting arrangements:
Interest rate swaps – not designated	2,422,236		15,176		38,787		2,245,442		27,233		15,303
Interest rate lock commitments – not designated	78,368		1,380		5		88,107		1,594		5
Forward delivery commitments – not designated	94,996		209		231		106,572		233		148
Credit risk contracts – not designated	206,747		20		64		235,196		39		109
Equity contracts – not designated	1,180		—		26		1,180		—		51
Total not subject to master netting arrangements	2,803,527		16,785		39,113		2,676,497		29,099		15,616
Total	$	5,931,943	$	20,292	$	51,892	$	5,628,119	$	30,547	$	29,197

Summary of Amounts Reclassified from Accumulated Other Comprehensive Income (AOCI)

The following table shows amounts reclassified from accumulated other comprehensive income for the three months ended March 31, 2018:

(in thousands)	Total			Net of Tax
Reclassified from AOCI to interest income	$	93		$	73
Reclassified from AOCI to interest expense	(129		)	(102		)

Effect of Derivative Financial Instruments on Income Statement

The following table presents the effect of certain derivative financial instruments on the income statement:

		Three Months Ended March 31,
(in thousands)	Income Statement Location	2018			2017
Interest Rate Contracts	Interest income - loans and leases	$	93		$	506
Interest Rate Contracts	Interest expense – short-term borrowings	(129		)	148
Interest Rate Swaps	Other income	(160		)	(219		)
Credit Risk Contracts	Other income	27			19

Designated as Hedging Instrument [Member]

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Summary of Key Data Related to Interest Rate

Following is a summary of key data related to interest rate contracts:

(in thousands)	March 31, 2018		December 31, 2017
Notional amount	$	705,000	$	705,000
Fair value included in other assets	—		228
Fair value included in other liabilities	3,662		1,982

Not Designated as Hedging Instrument [Member]

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Summary of Key Data Related to Interest Rate

Following is a summary of key data related to interest rate swaps:

(in thousands)	March 31, 2018		December 31, 2017
Notional amount	$	4,844,472	$	4,490,884
Fair value included in other assets	18,657		28,402
Fair value included in other liabilities	47,904		26,902

Counter Party [Member]

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Derivative Assets

The following table presents a reconciliation of the net amounts of derivative assets and derivative liabilities presented in the balance sheets to the net amounts that would result in the event of offset:

			Amount Not Offset in the Balance Sheet
(in thousands)	Net Amount Presented in the Balance Sheet		Financial Instruments		Cash Collateral	Net Amount
March 31, 2018
Derivative Assets
Interest rate contracts:
Designated	$	—	$	—	—	$	—
Not designated	3,481		3,451		—	30
Equity contracts – not designated	26		26		—	—
Total	$	3,507	$	3,477	—	$	30

December 31, 2017
Derivative Assets
Interest rate contracts:
Designated	$	228	$	228	$	—	$	—
Not designated	1,169		1,169		—		—
Equity contracts – not designated	51		51		—		—
Total	$	1,448	$	1,448	$	—	$	—

Derivative Liabilities

The following table presents a reconciliation of the net amounts of derivative assets and derivative liabilities presented in the balance sheets to the net amounts that would result in the event of offset:

			Amount Not Offset in the Balance Sheet
(in thousands)	Net Amount Presented in the Balance Sheet		Financial Instruments		Cash Collateral	Net Amount
March 31, 2018
Derivative Liabilities
Interest rate contracts:
Designated	$	3,662	$	3,662	—	$	—
Not designated	9,117		8,592		—	525
Total	$	12,779	$	12,254	—	$	525

December 31, 2017
Derivative Liabilities
Interest rate contracts:
Designated	$	1,982	$	1,982	$	—	$	—
Not designated	11,599		10,940		—		659
Total	$	13,581	$	12,922	$	—	$	659

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COMMITMENTS, CREDIT RISK AND CONTINGENCIES (Tables)

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Summary of Off-Balance Sheet Credit Risk Information

Following is a summary of off-balance sheet credit risk information:

(in thousands)	March 31, 2018		December 31, 2017
Commitments to extend credit	$	7,097,958	$	6,957,822
Standby letters of credit	136,661		132,904

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STOCK INCENTIVE PLANS (Tables)

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Activity Relating to Restricted Stock Awards

The following table summarizes the activity relating to restricted stock awards during the periods indicated:

	Three Months Ended March 31,
	2018				2017
	Awards		Weighted Average Grant Price per Share		Awards		Weighted Average Grant Price per Share
Unvested awards outstanding at beginning of period	1,975,862		$	13.64	1,836,363		$	12.97
Vested	(7,631	)	12.83		(243,982	)	11.83
Forfeited/expired	(19,893	)	14.02		(2,950	)	13.00
Dividend reinvestment	16,373		14.37		12,253		14.54
Unvested awards outstanding at end of period	1,964,711		13.65		1,601,684		13.16

Schedule of Certain Information Related to Restricted Stock Awards

The following table provides certain information related to restricted stock awards:

(in thousands)	Three Months Ended March 31,
	2018		2017
Stock-based compensation expense	$	1,939	$	1,760
Tax benefit related to stock-based compensation expense	407		616
Fair value of awards vested	110		3,802

Components of Restricted Stock Awards

The components of the restricted stock awards as of March 31, 2018 are as follows:

(dollars in thousands)	Service- Based Awards		Performance- Based Awards		Total
Unvested restricted stock awards	1,050,062		914,649		1,964,711
Unrecognized compensation expense	$	5,691	$	4,061	$	9,752
Intrinsic value	$	14,123	$	12,302	$	26,425
Weighted average remaining life (in years)	1.76		1.50		1.64

Summary of Activity Relating to Stock Options Awards

The following table summarizes the activity relating to stock options during the periods indicated:

	Three Months Ended March 31,
	2018				2017
	Shares		Weighted Average Exercise Price per  Share		Shares		Weighted Average Exercise Price per  Share
Options outstanding at beginning of period	722,650		$	7.96	892,532		$	8.95
Assumed from acquisitions	—		—		207,645		8.92
Exercised	(163,035	)	7.79		(131,792	)	9.44
Forfeited/expired	(237	)	10.72		(49,281	)	10.91
Options outstanding and exercisable at end of period	559,378		8.03		919,104		8.77

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RETIREMENT PLANS (Tables)

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Schedule of Contribution Expense

Our contribution expense is presented in the following table:

	Three Months Ended March 31,
(in thousands)	2018		2017
401(k) contribution expense	$	3,610	$	2,767

Net Periodic Benefit Credit for Defined Benefit Plans

The net periodic benefit credit for these plans includes the following components:

	Three Months Ended March 31,
(in thousands)	2018			2017
Service cost	$	(4	)	$	(4	)
Interest cost	1,560			1,477
Expected return on plan assets	(2,895		)	(2,427		)
Amortization:
Unrecognized prior service cost	—			2
Unrecognized loss	623			628
Net periodic pension credit	$	(716	)	$	(324	)

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INCOME TAXES (Tables)

3 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

Federal and state income tax expense and the statutory tax rate and the actual effective tax rate consist of the following:

	Three Months Ended March 31,
(in thousands)	2018			2017
Current income taxes:
Federal taxes	$	17,700		$	6,688
State taxes	1,704			499
Total current income taxes	19,404			7,187
Deferred income taxes:
Federal taxes	1,902			1,690
State taxes	(38		)	(2,393		)
Total deferred income taxes	1,864			(703		)
Total income taxes	$	21,268		$	6,484
Statutory tax rate	21.0		%	35.0		%
Effective tax rate	19.7		%	22.0		%

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OTHER COMPREHENSIVE INCOME (Tables)

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

Changes in AOCI, Net of Tax, by Component

The following table presents changes in AOCI, net of tax, by component:

(in thousands)	Unrealized Net Losses on Debt Securities Available for Sale			Unrealized Net Gains (Losses) on Derivative Instruments			Unrecognized Pension and Postretirement Obligations			Total
Three Months Ended March 31, 2018
Balance at beginning of period	$	(29,626	)	$	5,407		$	(58,833	)	$	(83,052	)
Other comprehensive (loss) income before reclassifications	(29,787		)	3,804			484			(25,499		)
Amounts reclassified from AOCI	—			(173		)	—			(173		)
Net current period other comprehensive (loss) income	(29,787		)	3,631			484			(25,672		)
Balance at end of period	$	(59,413	)	$	9,038		$	(58,349	)	$	(108,724	)

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EARNINGS PER COMMON SHARE (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Common Share

The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended March 31,
(dollars in thousands, except per share data)	2018		2017
Net income	$	86,762	$	22,979
Less: Preferred stock dividends	2,010		2,010
Net income available to common stockholders	$	84,752	$	20,969
Basic weighted average common shares outstanding	323,740,956		237,379,260
Net effect of dilutive stock options, warrants and restricted stock	2,026,012		1,882,423
Diluted weighted average common shares outstanding	325,766,968		239,261,683
Earnings per common share:
Basic	$	0.26	$	0.09
Diluted	$	0.26	$	0.09

Schedule of Average Shares Excluded from Diluted Earnings Per Common Share Calculation

The following table shows the average shares excluded from the above calculation as their effect would have been anti-dilutive: 

	Three Months Ended March 31,
	2018	2017
Average shares excluded from the diluted earnings per common share calculation	21	81,755

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CASH FLOW INFORMATION (Tables)

3 Months Ended

Mar. 31, 2018

Supplemental Cash Flow Elements [Abstract]

Summary of Supplemental Cash Flow Information

Following is a summary of supplemental cash flow information:

	Three Months Ended March 31,
	2018		2017
(in thousands)
Interest paid on deposits and other borrowings	$	46,540	$	18,606
Transfers of loans to other real estate owned	3,954		20,517

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BUSINESS SEGMENTS (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Financial Information for Segments

The following tables provide financial information for these segments of FNB. The information provided under the caption “Parent and Other” represents operations not considered to be reportable segments and/or general operating expenses of FNB, and includes the parent company, other non-bank subsidiaries and eliminations and adjustments to reconcile to the Consolidated Financial Statements.

(in thousands)	Community Banking		Wealth Management		Insurance		Consumer Finance		Parent and Other			Consolidated
At or for the Three Months Ended March 31, 2018
Interest income	$	263,587	$	—	$	20	$	9,294	$	26		$	272,927
Interest expense	42,360		—		—		910		3,552			46,822
Net interest income	221,227		—		20		8,384		(3,526		)	226,105
Provision for credit losses	12,412		—		—		2,083		—			14,495
Non-interest income	53,312		11,002		4,303		638		(1,752		)	67,503
Non-interest expense (1)	148,667		8,278		3,711		5,230		979			166,865
Amortization of intangibles	4,105		61		52		—		—			4,218
Income tax expense (benefit)	21,720		589		124		474		(1,639		)	21,268
Net income (loss)	87,635		2,074		436		1,235		(4,618		)	86,762
Total assets	31,424,150		25,129		20,529		169,737		12,808			31,652,353
Total intangibles	2,315,127		10,128		12,075		1,809		—			2,339,139
At or for the Three Months Ended March 31, 2017
Interest income	$	185,381	$	—	$	20	$	9,902	$	(610	)	$	194,693
Interest expense	18,865		—		—		922		2,154			21,941
Net interest income	166,516		—		20		8,980		(2,764		)	172,752
Provision for credit losses	9,064		—		—		1,786		—			10,850
Non-interest income	40,716		9,549		4,325		710		(184		)	55,116
Non-interest expense (1)	168,283		7,540		3,315		5,231		88			184,457
Amortization of intangibles	2,982		61		55		—		—			3,098
Income tax expense (benefit)	6,311		711		347		1,067		(1,952		)	6,484
Net income (loss)	20,592		1,237		628		1,606		(1,084		)	22,979
Total assets	29,978,061		22,130		20,514		184,006		(14,016		)	30,190,695
Total intangibles	2,332,352		10,353		12,285		1,809		—			2,356,799

(1) Excludes amortization of intangibles, which is presented separately.

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FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table presents the balances of assets and liabilities measured at fair value on a recurring basis:

(in thousands)	Level 1		Level 2		Level 3		Total
March 31, 2018
Assets Measured at Fair Value
Debt securities available for sale
U.S. government-sponsored entities	$	—	$	358,648	$	—	$	358,648
Residential mortgage-backed securities:
Agency mortgage-backed securities	—		1,671,573		—		1,671,573
Agency collateralized mortgage obligations	—		832,350		—		832,350
Non-agency collateralized mortgage obligations	—		1		—		1
Commercial mortgage-backed securities	—		39,213		—		39,213
States of the U.S. and political subdivisions	—		21,023		—		21,023
Other debt securities	—		4,655		—		4,655
Total debt securities available for sale	—		2,927,463		—		2,927,463
Loans held for sale	—		21,610		—		21,610
Marketable equity securities
Fixed income mutual fund	177		—		—		177
Financial services industry	—		944		—		944
Total marketable equity securities	177		944		—		1,121
Derivative financial instruments
Trading	—		18,683		—		18,683
Not for trading	—		229		1,380		1,609
Total derivative financial instruments	—		18,912		1,380		20,292
Total assets measured at fair value on a recurring basis	$	177	$	2,968,929	$	1,380	$	2,970,486
Liabilities Measured at Fair Value
Derivative financial instruments
Trading	$	—	$	47,930	$	—	$	47,930
Not for trading	—		3,957		5		3,962
Total derivative financial instruments	—		51,887		5		51,892
Total liabilities measured at fair value on a recurring basis	$	—	$	51,887	$	5	$	51,892

(in thousands)	Level 1		Level 2		Level 3		Total
December 31, 2017
Assets Measured at Fair Value
Debt securities available for sale
U.S. government-sponsored entities	$	—	$	343,942	$	—	$	343,942
Residential mortgage-backed securities:
Agency mortgage-backed securities	—		1,598,874		—		1,598,874
Agency collateralized mortgage obligations	—		794,957		—		794,957
Non-agency collateralized mortgage obligations	—		1		—		1
States of the U.S. and political subdivisions	—		21,093		—		21,093
Other debt securities	—		4,670		—		4,670
Total debt securities available for sale	—		2,763,537		—		2,763,537
Equity securities available for sale
Fixed income mutual fund	161		—		—		161
Financial services industry	—		864		—		864
Total equity securities available for sale	161		864		—		1,025
Total securities available for sale	161		2,764,401		—		2,764,562
Loans held for sale	—		56,458		—		56,458
Derivative financial instruments
Trading	—		28,453		—		28,453
Not for trading	—		500		1,594		2,094
Total derivative financial instruments	—		28,953		1,594		30,547
Total assets measured at fair value on a recurring basis	$	161	$	2,849,812	$	1,594	$	2,851,567
Liabilities Measured at Fair Value
Derivative financial instruments
Trading	$	—	$	26,953	$	—	$	26,953
Not for trading	—		2,239		5		2,244
Total derivative financial instruments	—		29,192		5		29,197
Total liabilities measured at fair value on a recurring basis	$	—	$	29,192	$	5	$	29,197

Additional Information about Assets Measured at Fair Value on Recurring Basis

The following table presents additional information about assets measured at fair value on a recurring basis and for which we have utilized Level 3 inputs to determine fair value:

(in thousands)	Other Debt Securities			Equity Securities			Residential Non-Agency Collateralized Mortgage Obligations			Interest Rate Lock Commitments			Total
Three Months Ended March 31, 2018
Balance at beginning of period	$	—		$	—		$	—		$	1,594		$	1,594
Purchases, issuances, sales and settlements:
Purchases	—			—			—			1,380			1,380
Settlements	—			—			—			(1,594		)	(1,594		)
Balance at end of period	$	—		$	—		$	—		$	1,380		$	1,380
Year Ended December 31, 2017
Balance at beginning of period	$	—		$	492		$	894		$	—		$	1,386
Total gains (losses) – realized/unrealized:
Included in earnings	—			—			4			—			4
Included in other comprehensive income	—			86			(6		)	—			80
Accretion included in earnings	(1		)	—			1			—			—
Purchases, issuances, sales and settlements:
Purchases	12,048			—			—			1,594			13,642
Sales/redemptions	(12,047		)	—			(874		)	—			(12,921		)
Settlements	—			—			(19		)	(4,569		)	(4,588		)
Transfers from Level 3	—			(578		)	—			—			(578		)
Transfers into Level 3	—			—			—			4,569			4,569
Balance at end of period	$	—		$	—		$	—		$	1,594		$	1,594

Additional Information about Assets Measured at Fair Value on Non-Recurring Basis

For assets measured at fair value on a non-recurring basis still held at the balance sheet date, the following table provides the hierarchy level and the fair value of the related assets or portfolios:

(in thousands)	Level 1		Level 2		Level 3		Total
March 31, 2018
Impaired loans	$	—	$	2,032	$	1,475	$	3,507
Other real estate owned	—		—		1,621		1,621
Other assets - SBA servicing asset	—		—		5,062		5,062
December 31, 2017
Impaired loans	$	—	$	2,813	$	1,297	$	4,110
Other real estate owned	—		10,513		10,823		21,336
Loans held for sale - SBA	—		—		36,432		36,432
Other assets - SBA servicing asset	—		—		5,058		5,058

Fair Values of Financial Instruments

The fair values of our financial instruments are as follows:

					Fair Value Measurements
(in thousands)	Carrying Amount		Fair  Value		Level 1		Level 2		Level 3
March 31, 2018
Financial Assets
Cash and cash equivalents	$	386,329	$	386,329	$	386,329	$	—	$	—
Debt securities available for sale	2,927,463		2,927,463		—		2,927,463		—
Debt securities held to maturity	3,224,000		3,131,964		—		3,131,964		—
Net loans and leases, including loans held for sale	21,121,132		20,900,639		—		21,610		20,879,029
Loan servicing rights	35,853		41,878		—		—		41,878
Marketable equity securities	1,121		1,121		177		944		—
Derivative assets	20,292		20,292		—		18,912		1,380
Accrued interest receivable	95,082		95,082		95,082		—		—
Financial Liabilities
Deposits	22,497,089		22,441,017		17,755,830		4,685,187		—
Short-term borrowings	3,802,480		3,802,988		3,802,988		—		—
Long-term borrowings	659,890		663,085		—		—		663,085
Derivative liabilities	51,892		51,892		—		51,887		5
Accrued interest payable	12,762		12,762		12,762		—		—
December 31, 2017
Financial Assets
Cash and cash equivalents	$	479,443	$	479,443	$	479,443	$	—	$	—
Securities available for sale	2,764,562		2,764,562		161		2,764,401		—
Debt securities held to maturity	3,242,268		3,218,379		—		3,218,379		—
Net loans and leases, including loans held for sale	20,916,277		20,661,196		—		56,458		20,604,738
Loan servicing rights	34,111		37,758		—		—		37,758
Derivative assets	30,547		30,547		—		28,953		1,594
Accrued interest receivable	94,254		94,254		94,254		—		—
Financial Liabilities
Deposits	22,399,725		22,359,182		17,779,246		4,579,936		—
Short-term borrowings	3,678,337		3,678,723		3,678,723		—		—
Long-term borrowings	668,173		675,489		—		—		675,489
Derivative liabilities	29,197		29,197		—		29,192		5
Accrued interest payable	12,480		12,480		12,480		—		—

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NATURE OF OPERATIONS (Detail)	3 Months Ended
	Mar. 31, 2018 Office State
Segment Reporting Information [Line Items]
Number of states, Company operating financial services | State	8
Number of banking offices	417
Number of consumer finance offices	77
Minimum [Member]
Segment Reporting Information [Line Items]
Years of service (over)	150 years

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Net investment in LIHTCs	$ 26.1	$ 20.9
Qualified affordable housing project investments, commitment	$ 60.1	$ 67.2

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NEW ACCOUNTING STANDARDS (Details) $ in Millions	Mar. 31, 2018 USD ($)
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	$ 1.1

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MERGERS AND ACQUISITIONS - Additional Information (Detail) - Yadkin Financial Corporation (YDKN) [Member] $ / shares in Units, $ in Billions	Mar. 11, 2017 USD ($) $ / shares shares
Business Acquisition [Line Items]
Assets acquired as a result of merger	$ 6.8
Loans acquired as a result of merger	5.1
Deposits acquired as a result of merger	5.2
Value of acquisition	$ 1.8
Closing price of common stock (in dollars per share) | $ / shares	$ 15.97
Number of shares (in shares) | shares	111,619,622
Common shares to be acquired (shares) | shares	51,677,565
Ratio of shares entitled to receive as per merger agreement	2.16
Warrant Expires in 2019 [Member]
Business Acquisition [Line Items]
Warrant issued (in shares) | shares	207,320
Warrant issued, exercise price (in dollars per share) | $ / shares	$ 9.63

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SECURITIES - Amortized Cost and Fair Value of Securities Available for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 3,003,776	$ 2,802,621
Gross Unrealized Gains	519	1,721
Gross Unrealized Losses	(76,832)	(39,780)
Securities available for sale	2,927,463	2,764,562
U.S. Government-Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	364,600	347,767
Gross Unrealized Gains	0	52
Gross Unrealized Losses	(5,952)	(3,877)
Securities available for sale	358,648	343,942
Agency Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,713,036	1,615,168
Gross Unrealized Gains	458	1,225
Gross Unrealized Losses	(41,921)	(17,519)
Securities available for sale	1,671,573	1,598,874
Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	860,902	813,034
Gross Unrealized Gains	28	0
Gross Unrealized Losses	(28,580)	(18,077)
Securities available for sale	832,350	794,957
Non-Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1	1
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Securities available for sale	1	1
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	39,183
Gross Unrealized Gains	30
Gross Unrealized Losses	0
Securities available for sale	39,213
States of the U.S. and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	21,138	21,151
Gross Unrealized Gains	3	6
Gross Unrealized Losses	(118)	(64)
Securities available for sale	21,023	21,093
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,916	4,913
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(261)	(243)
Securities available for sale	$ 4,655	4,670
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		2,802,034
Gross Unrealized Gains		1,283
Gross Unrealized Losses		(39,780)
Securities available for sale		2,763,537
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		587
Gross Unrealized Gains		438
Gross Unrealized Losses		0
Securities available for sale		$ 1,025

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SECURITIES - Amortized Cost and Fair Value of Securities Held to Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investment Securities Held To Maturity [Line Items]
Amortized Cost	$ 3,224,000	$ 3,242,268
Gross Unrealized Gains	3,458	17,357
Gross Unrealized Losses	(95,494)	(41,246)
Fair Value	3,131,964	3,218,379
U.S. Treasury [Member]
Investment Securities Held To Maturity [Line Items]
Amortized Cost	500	500
Gross Unrealized Gains	114	134
Gross Unrealized Losses	0	0
Fair Value	614	634
U.S. Government-Sponsored Entities [Member]
Investment Securities Held To Maturity [Line Items]
Amortized Cost	247,272	247,310
Gross Unrealized Gains	81	93
Gross Unrealized Losses	(5,716)	(4,388)
Fair Value	241,637	243,015
Agency Mortgage-Backed Securities [Member]
Investment Securities Held To Maturity [Line Items]
Amortized Cost	1,174,426	1,219,802
Gross Unrealized Gains	491	3,475
Gross Unrealized Losses	(27,472)	(9,058)
Fair Value	1,147,445	1,214,219
Agency Collateralized Mortgage Obligations [Member]
Investment Securities Held To Maturity [Line Items]
Amortized Cost	783,151	777,146
Gross Unrealized Gains	257	32
Gross Unrealized Losses	(29,971)	(20,095)
Fair Value	753,437	757,083
Commercial Mortgage-Backed Securities [Member]
Investment Securities Held To Maturity [Line Items]
Amortized Cost	79,476	80,786
Gross Unrealized Gains	32	414
Gross Unrealized Losses	(1,245)	(575)
Fair Value	78,263	80,625
States of the U.S. and Political Subdivisions [Member]
Investment Securities Held To Maturity [Line Items]
Amortized Cost	939,175	916,724
Gross Unrealized Gains	2,483	13,209
Gross Unrealized Losses	(31,090)	(7,130)
Fair Value	$ 910,568	$ 922,803

XML

SECURITIES - Gross Gains and Gross Losses Realized on Sales of Securities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Gross gains	$ 0	$ 3,400
Gross losses	0	(775)
Net gains	$ 0	$ 2,625

XML

SECURITIES - Amortized Cost and Fair Value of Securities, by Contractual Maturities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Securities [Line Items]
Available for sale, due in one year or less, amortized cost	$ 65,814
Available for sale, due from one to five years, amortized cost	262,236
Available for sale, due from five to ten years, amortized cost	7,876
Available for sale, due after ten years, amortized cost	54,728
Available for sale, with contractual maturities, amortized cost	390,654
Total securities available for sale, amortized cost	3,003,776	$ 2,802,621
Available for sale, due in one year or less, fair value	65,498
Available for sale, due from one to five years, fair value	256,811
Available for sale, due from five to ten years, fair value	7,725
Available for sale, due after ten years, fair value	54,292
Available for sale, with contractual maturities, fair value	384,326
Total securities available for sale, fair value	2,927,463	2,764,562
Held to maturity, due in one year or less, amortized cost	45,461
Held to maturity, due from one to five years, amortized cost	210,014
Held to maturity, due from five to ten years, amortized cost	94,022
Held to maturity, due after ten years, amortized cost	837,450
Securities held to maturity, with contractual maturities, amortized cost	1,186,947
Held to maturity, with contractual maturities, amortized cost	3,224,000	3,242,268
Held to maturity, due in one year or less, fair value	45,221
Held to maturity, due from one to five years, fair value	204,580
Held to maturity, due from five to ten years, fair value	93,225
Held to maturity, due after ten years, fair value	809,793
Securities held to maturity, with contractual maturities, fair value	1,152,819
Held to maturity, with contractual maturities, fair value	3,131,964	3,218,379
Agency Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, amortized cost	1,713,036	1,615,168
Total securities available for sale, fair value	1,671,573	1,598,874
Held to maturity, with contractual maturities, amortized cost	1,174,426
Held to maturity, with contractual maturities, fair value	1,147,445
Agency Collateralized Mortgage Obligations [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, amortized cost	860,902	813,034
Total securities available for sale, fair value	832,350	794,957
Held to maturity, with contractual maturities, amortized cost	783,151
Held to maturity, with contractual maturities, fair value	753,437
Non-Agency Collateralized Mortgage Obligations [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, amortized cost	1	1
Total securities available for sale, fair value	1	1
Held to maturity, with contractual maturities, amortized cost	0
Held to maturity, with contractual maturities, fair value	0
Commercial Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, amortized cost	39,183
Total securities available for sale, fair value	39,213
Held to maturity, with contractual maturities, amortized cost	79,476
Held to maturity, with contractual maturities, fair value	$ 78,263
Equity Securities [Member]
Schedule Of Securities [Line Items]
Total securities available for sale, amortized cost		587
Total securities available for sale, fair value		$ 1,025

XML

SECURITIES - Schedule of Securities Pledged as Collateral (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Securities pledged (carrying value), to secure public deposits, trust deposits and for other purposes as required by law	$ 3,532,023	$ 3,491,634
Securities pledged (carrying value), as collateral for short-term borrowings	$ 298,233	$ 263,756
Securities pledged as a percent of total securities	62.30%	62.50%

XML

SECURITIES - Fair Values and Unrealized Losses of Impaired Securities, by Length of Impairment (Detail) $ in Thousands	Mar. 31, 2018 USD ($) Security	Dec. 31, 2017 USD ($) Security
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	90	71
Number of available for sale securities, Greater than 1 year | Security	75	75
Number of available for sale securities | Security	165	146
Securities available for sale, less than 12 months, fair value	$ 1,853,291	$ 1,503,806
Securities available for sale, less than 12 months, unrealized losses	(40,316)	(14,372)
Securities available for sale, 12 months or more, fair value	963,238	1,016,111
Securities available for sale, 12 months or more, unrealized losses	(36,516)	(25,408)
Securities available for sale, fair value, total	2,816,529	2,519,917
Securities available for sale, unrealized losses, total	$ (76,832)	$ (39,780)
Number of held to maturity securities | Security	343	168
Securities held to maturity, less than 12 months, fair value	$ 1,822,941	$ 1,061,703
Securities held to maturity, less than 12 months, unrealized losses	(43,619)	(7,851)
Securities held to maturity, greater than 12 months, fair value	935,869	984,076
Securities held to maturity, greater than 12 months, unrealized losses	(51,875)	(33,395)
Securities held to maturity, fair value, total	2,758,810	2,045,779
Securities held to maturity, unrealized losses, total	$ (95,494)	$ (41,246)
Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	247	73
Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	96	95
U.S. Government-Sponsored Entities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	8	7
Number of available for sale securities, Greater than 1 year | Security	10	10
Number of available for sale securities | Security	18	17
Securities available for sale, less than 12 months, fair value	$ 158,212	$ 106,809
Securities available for sale, less than 12 months, unrealized losses	(1,389)	(363)
Securities available for sale, 12 months or more, fair value	200,436	201,485
Securities available for sale, 12 months or more, unrealized losses	(4,563)	(3,514)
Securities available for sale, fair value, total	358,648	308,294
Securities available for sale, unrealized losses, total	$ (5,952)	$ (3,877)
Number of held to maturity securities | Security	14	14
Securities held to maturity, less than 12 months, fair value	$ 54,558	$ 54,790
Securities held to maturity, less than 12 months, unrealized losses	(465)	(239)
Securities held to maturity, greater than 12 months, fair value	184,750	185,851
Securities held to maturity, greater than 12 months, unrealized losses	(5,251)	(4,149)
Securities held to maturity, fair value, total	239,308	240,641
Securities held to maturity, unrealized losses, total	$ (5,716)	$ (4,388)
U.S. Government-Sponsored Entities [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	4	4
U.S. Government-Sponsored Entities [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	10	10
Agency Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	59	43
Number of available for sale securities, Greater than 1 year | Security	28	28
Number of available for sale securities | Security	87	71
Securities available for sale, less than 12 months, fair value	$ 1,212,767	$ 976,738
Securities available for sale, less than 12 months, unrealized losses	(25,545)	(7,723)
Securities available for sale, 12 months or more, fair value	444,583	473,625
Securities available for sale, 12 months or more, unrealized losses	(16,376)	(9,796)
Securities available for sale, fair value, total	1,657,350	1,450,363
Securities available for sale, unrealized losses, total	$ (41,921)	$ (17,519)
Number of held to maturity securities | Security	84	47
Securities held to maturity, less than 12 months, fair value	$ 935,246	$ 648,485
Securities held to maturity, less than 12 months, unrealized losses	(20,410)	(4,855)
Securities held to maturity, greater than 12 months, fair value	173,759	183,989
Securities held to maturity, greater than 12 months, unrealized losses	(7,062)	(4,203)
Securities held to maturity, fair value, total	1,109,005	832,474
Securities held to maturity, unrealized losses, total	$ (27,472)	$ (9,058)
Agency Mortgage-Backed Securities [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	73	36
Agency Mortgage-Backed Securities [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	11	11
Agency Collateralized Mortgage Obligations [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	16	14
Number of available for sale securities, Greater than 1 year | Security	33	33
Number of available for sale securities | Security	49	47
Securities available for sale, less than 12 months, fair value	$ 470,878	$ 409,005
Securities available for sale, less than 12 months, unrealized losses	(13,274)	(6,231)
Securities available for sale, 12 months or more, fair value	312,687	335,452
Securities available for sale, 12 months or more, unrealized losses	(15,306)	(11,846)
Securities available for sale, fair value, total	783,565	744,457
Securities available for sale, unrealized losses, total	$ (28,580)	$ (18,077)
Number of held to maturity securities | Security	51	49
Securities held to maturity, less than 12 months, fair value	$ 267,299	$ 275,290
Securities held to maturity, less than 12 months, unrealized losses	(5,862)	(1,701)
Securities held to maturity, greater than 12 months, fair value	444,572	473,257
Securities held to maturity, greater than 12 months, unrealized losses	(24,109)	(18,394)
Securities held to maturity, fair value, total	711,871	748,547
Securities held to maturity, unrealized losses, total	$ (29,971)	$ (20,095)
Agency Collateralized Mortgage Obligations [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	16	14
Agency Collateralized Mortgage Obligations [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	35	35
Commercial Mortgage-Backed Securities [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	9	5
Securities held to maturity, less than 12 months, fair value	$ 48,737	$ 26,399
Securities held to maturity, less than 12 months, unrealized losses	(637)	(123)
Securities held to maturity, greater than 12 months, fair value	19,909	19,443
Securities held to maturity, greater than 12 months, unrealized losses	(608)	(452)
Securities held to maturity, fair value, total	68,646	45,842
Securities held to maturity, unrealized losses, total	$ (1,245)	$ (575)
Commercial Mortgage-Backed Securities [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	6	3
Commercial Mortgage-Backed Securities [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	3	2
States of the U.S. and Political Subdivisions [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	7	7
Number of available for sale securities, Greater than 1 year | Security	1	1
Number of available for sale securities | Security	8	8
Securities available for sale, less than 12 months, fair value	$ 11,434	$ 11,254
Securities available for sale, less than 12 months, unrealized losses	(108)	(55)
Securities available for sale, 12 months or more, fair value	877	879
Securities available for sale, 12 months or more, unrealized losses	(10)	(9)
Securities available for sale, fair value, total	12,311	12,133
Securities available for sale, unrealized losses, total	$ (118)	$ (64)
Number of held to maturity securities | Security	185	53
Securities held to maturity, less than 12 months, fair value	$ 517,101	$ 56,739
Securities held to maturity, less than 12 months, unrealized losses	(16,245)	(933)
Securities held to maturity, greater than 12 months, fair value	112,879	121,536
Securities held to maturity, greater than 12 months, unrealized losses	(14,845)	(6,197)
Securities held to maturity, fair value, total	629,980	178,275
Securities held to maturity, unrealized losses, total	$ (31,090)	$ (7,130)
States of the U.S. and Political Subdivisions [Member] | Less than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	148	16
States of the U.S. and Political Subdivisions [Member] | Greater than 12 Months [Member]
Schedule Of Securities [Line Items]
Number of held to maturity securities | Security	37	37
Other Debt Securities [Member]
Schedule Of Securities [Line Items]
Number of available for sale securities, Less than 1 year | Security	0	0
Number of available for sale securities, Greater than 1 year | Security	3	3
Number of available for sale securities | Security	3	3
Securities available for sale, less than 12 months, fair value	$ 0	$ 0
Securities available for sale, less than 12 months, unrealized losses	0	0
Securities available for sale, 12 months or more, fair value	4,655	4,670
Securities available for sale, 12 months or more, unrealized losses	(261)	(243)
Securities available for sale, fair value, total	4,655	4,670
Securities available for sale, unrealized losses, total	$ (261)	$ (243)

XML

SECURITIES - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule Of Securities [Line Items]
Other than temporary impairment losses, investments, available-for-sale securities	$ 0	$ 0
Municipal bond portfolio, value	$ 960,200
Percentage of formal credit enhancement insurance of municipalities	62.00%
Municipal Bonds [Member] | Weighted Average [Member]
Schedule Of Securities [Line Items]
Average holding size of securities in bond portfolio	$ 3,000
Municipal Bonds [Member] | Credit Concentration Risk [Member] | General Obligation Bonds [Member] | A Rating [Member] | Minimum [Member]
Schedule Of Securities [Line Items]
Percentage of portfolio	100.00%
Municipal Bonds [Member] | Geographic Concentration Risk [Member] | Pennsylvania, Ohio and Maryland [Member]
Schedule Of Securities [Line Items]
Percentage of portfolio	65.00%

XML

LOANS AND LEASES - Net of Unearned Income (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	$ 21,262,397	$ 20,998,766
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	8,811,475	8,741,864
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	4,279,969	4,170,667
Commercial Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	279,582	266,720
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	39,347	17,063
Total Commercial Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	13,410,373	13,196,314
Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,871,639	1,905,535
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	2,762,101	2,702,691
Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,524,501	1,448,433
Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,693,783	1,745,793
Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	7,852,024	7,802,452
Originated Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	16,000,597	15,345,490
Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	5,465,150	5,174,783
Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	3,688,120	3,495,247
Originated Loans and Leases [Member] | Commercial Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	279,582	266,720
Originated Loans and Leases [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	39,347	17,063
Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	9,472,199	8,953,813
Originated Loans and Leases [Member] | Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,737,242	1,755,713
Originated Loans and Leases [Member] | Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	2,131,338	2,036,226
Originated Loans and Leases [Member] | Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,524,330	1,448,268
Originated Loans and Leases [Member] | Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	1,135,488	1,151,470
Originated Loans and Leases [Member] | Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	6,528,398	6,391,677
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	5,261,800	5,653,276
Acquired Loans [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	3,346,325	3,567,081
Acquired Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	591,849	675,420
Acquired Loans [Member] | Commercial Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	0	0
Acquired Loans [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	0	0
Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	3,938,174	4,242,501
Acquired Loans [Member] | Direct Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	134,397	149,822
Acquired Loans [Member] | Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	630,763	666,465
Acquired Loans [Member] | Indirect Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	171	165
Acquired Loans [Member] | Consumer Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	558,295	594,323
Acquired Loans [Member] | Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of unearned income	$ 1,323,626	$ 1,410,775

XML

LOANS AND LEASES - Commercial Real Estate Loans (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Commercial construction, acquisition and development loans	$ 1,167,699	$ 1,170,175
Credit Concentration Risk [Member] | Commercial Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Percent of total loans and leases	5.50%	5.60%
Loan Portfolio Diversification Risk [Member] | Commercial Real Estate Loans [Member] | Owner-Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Percent of total loans and leases	35.20%	35.30%
Loan Portfolio Diversification Risk [Member] | Commercial Real Estate Loans [Member] | Non-Owner-Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Percent of total loans and leases	64.80%	64.70%

XML

LOANS AND LEASES - Outstanding Principal Balance and Carrying Amount of Acquired Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 21,262,397	$ 20,998,766
Accounted for under ASC 310-30 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	4,853,516	5,176,015
Carrying amount	4,521,926	4,834,256
Accounted for under ASC 310-20 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	754,251	835,130
Carrying amount	733,037	812,322
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	5,607,767	6,011,145
Carrying amount	$ 5,254,963	$ 5,646,578

XML

LOANS AND LEASES - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 21,262,397,000		$ 20,998,766,000
Reclassification from non-accretable difference	$ 64,216,000	$ 23,106,000
Sustained period of delinquency for impairment evaluation	90 years
Valuation for impairment of loans with pooled reserves	$ 500,000
Minimum amount to allocate specific valuation allowance	500,000
Interest income on impaired loans	1,600,000	$ 1,900,000
Restructured loans returned to performing status	1,200,000
Minimum reserves for commercial loan	500,000
Pooled reserves for all other classes of loans	$ 4,000,000		4,000,000
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due Period For Loan To Be In Default	12 months
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due Period For Loan To Be In Default	90 days
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold period past due for default non-accrual status of trade accounts receivable	90 days
Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold period past due for default non-accrual status of trade accounts receivable	120 days
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold period past due for default non-accrual status of trade accounts receivable	180 days
Carrying value of OREO through foreclosure	$ 4,800,000		3,600,000
Mortgage loans on real estate, foreclosure	13,800,000		15,200,000
Purchased Credit-Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 1,700,000		$ 1,900,000
Purchased Credit-Impaired Loans [Member] | Credit Concentration Risk [Member] | Acquired Loans Receivable [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio			0.03%
Purchased Credit-Impaired Loans [Member] | Credit Concentration Risk [Member] | Acquired Loans Receivable [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio	0.03%

XML

LOANS AND LEASES - Change in Accretable Yield of Acquired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 708,481	$ 467,070
Acquisitions	0	443,261
Reduction due to unexpected early payoffs	(25,833)	(20,560)
Reclass from non-accretable difference	64,216	23,106
Disposals/transfers	(57)	(36)
Other	(403)	0
Accretion	(59,079)	(25,241)
Balance at end of period	$ 687,325	$ 887,600

XML

LOANS AND LEASES - Non-Performing Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings	$ 55,251	$ 53,991
Non-Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	77,684	74,635
Troubled debt restructurings	24,452	23,481
Total non-performing loans	102,136	98,116
Other real estate owned	40,980	40,606
Total non-performing assets	$ 143,116	$ 138,722
Non-performing loans / total loans and leases	0.48%	0.47%
Non-performing loans OREO / total loans and leases OREO	0.67%	0.66%
Non-performing assets / total assets	0.45%	0.44%

XML

LOANS AND LEASES - Age Analysis of Past Due Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 21,262,397	$ 20,998,766
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	8,811,475	8,741,864
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	4,279,969	4,170,667
Commercial Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	279,582	266,720
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	39,347	17,063
Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	13,410,373	13,196,314
Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,871,639	1,905,535
Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,762,101	2,702,691
Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,524,501	1,448,433
Consumer Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,693,783	1,745,793
Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	7,852,024	7,802,452
Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	125,837	134,911
Non- Accrual	68,121	63,644
Current	15,874,760	15,210,579
Total Loans	16,000,597	15,345,490
Originated Loans and Leases [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	50,412	62,146
Originated Loans and Leases [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	7,304	9,121
Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	35,695	33,047
Non- Accrual	27,349	24,773
Current	5,429,455	5,141,736
Total Loans	5,465,150	5,174,783
Originated Loans and Leases [Member] | Commercial Real Estate [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8,345	8,273
Originated Loans and Leases [Member] | Commercial Real Estate [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1	1
Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	26,501	26,028
Non- Accrual	19,705	17,077
Current	3,661,619	3,469,219
Total Loans	3,688,120	3,495,247
Originated Loans and Leases [Member] | Commercial and Industrial [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	6,793	8,948
Originated Loans and Leases [Member] | Commercial and Industrial [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3	3
Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,091	2,997
Non- Accrual	1,399	1,574
Current	277,491	263,723
Total Loans	279,582	266,720
Originated Loans and Leases [Member] | Commercial Leases [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	692	1,382
Originated Loans and Leases [Member] | Commercial Leases [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	41
Originated Loans and Leases [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,256	1,236
Non- Accrual	1,000	1,000
Current	38,091	15,827
Total Loans	39,347	17,063
Originated Loans and Leases [Member] | Other [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	183	83
Originated Loans and Leases [Member] | Other [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	73	153
Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	65,543	63,308
Non- Accrual	49,453	44,424
Current	9,406,656	8,890,505
Total Loans	9,472,199	8,953,813
Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	16,013	18,686
Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	77	198
Originated Loans and Leases [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	20,453	26,554
Non- Accrual	8,411	8,896
Current	1,716,789	1,729,159
Total Loans	1,737,242	1,755,713
Originated Loans and Leases [Member] | Direct Installment [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8,129	13,192
Originated Loans and Leases [Member] | Direct Installment [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,913	4,466
Originated Loans and Leases [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	22,106	22,699
Non- Accrual	5,254	5,771
Current	2,109,232	2,013,527
Total Loans	2,131,338	2,036,226
Originated Loans and Leases [Member] | Residential Mortgages [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	14,870	14,096
Originated Loans and Leases [Member] | Residential Mortgages [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,982	2,832
Originated Loans and Leases [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9,595	13,164
Non- Accrual	2,234	2,240
Current	1,514,735	1,435,104
Total Loans	1,524,330	1,448,268
Originated Loans and Leases [Member] | Indirect Installment [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	6,850	10,313
Originated Loans and Leases [Member] | Indirect Installment [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	511	611
Originated Loans and Leases [Member] | Consumer Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8,140	9,186
Non- Accrual	2,769	2,313
Current	1,127,348	1,142,284
Total Loans	1,135,488	1,151,470
Originated Loans and Leases [Member] | Consumer Lines of Credit [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,550	5,859
Originated Loans and Leases [Member] | Consumer Lines of Credit [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	821	1,014
Originated Loans and Leases [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	60,294	71,603
Non- Accrual	18,668	19,220
Current	6,468,104	6,320,074
Total Loans	6,528,398	6,391,677
Originated Loans and Leases [Member] | Consumer Loan [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	34,399	43,460
Originated Loans and Leases [Member] | Consumer Loan [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	7,227	8,923
Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	156,803	167,867
Non- Accrual	9,563	10,991
Current	5,379,218	5,768,610
(Discount) Premium	(274,221)	(283,201)
Total Loans	5,261,800	5,653,276
Acquired Loans [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	61,128	66,926
Acquired Loans [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	86,112	89,950
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	100,982	101,995
Non- Accrual	3,735	3,975
Current	3,433,231	3,657,152
(Discount) Premium	(187,888)	(192,066)
Total Loans	3,346,325	3,567,081
Acquired Loans [Member] | Commercial Real Estate [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	32,697	34,928
Acquired Loans [Member] | Commercial Real Estate [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	64,550	63,092
Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	14,404	15,302
Non- Accrual	4,652	5,663
Current	612,354	698,265
(Discount) Premium	(34,909)	(38,147)
Total Loans	591,849	675,420
Acquired Loans [Member] | Commercial and Industrial [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5,135	3,187
Acquired Loans [Member] | Commercial and Industrial [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,617	6,452
Acquired Loans [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	115,386	117,297
Non- Accrual	8,387	9,638
Current	4,045,585	4,355,417
(Discount) Premium	(222,797)	(230,213)
Total Loans	3,938,174	4,242,501
Acquired Loans [Member] | Commercial Loans [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	37,832	38,115
Acquired Loans [Member] | Commercial Loans [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	69,167	69,544
Acquired Loans [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	0
Acquired Loans [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	0
Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	3,938,174	4,242,501
Acquired Loans [Member] | Direct Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,572	7,280
Non- Accrual	0	0
Current	128,754	141,386
(Discount) Premium	1,071	1,156
Total Loans	134,397	149,822
Acquired Loans [Member] | Direct Installment [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,826	5,267
Acquired Loans [Member] | Direct Installment [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,746	2,013
Acquired Loans [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	28,172	32,330
Non- Accrual	0	0
Current	642,966	675,499
(Discount) Premium	(40,375)	(41,364)
Total Loans	630,763	666,465
Acquired Loans [Member] | Residential Mortgages [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	15,113	17,191
Acquired Loans [Member] | Residential Mortgages [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	13,059	15,139
Acquired Loans [Member] | Indirect Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1	1
Non- Accrual	0	0
Current	7	10
(Discount) Premium	163	154
Total Loans	171	165
Acquired Loans [Member] | Indirect Installment [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Acquired Loans [Member] | Indirect Installment [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1	1
Acquired Loans [Member] | Consumer Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8,672	10,959
Non- Accrual	1,176	1,353
Current	561,906	596,298
(Discount) Premium	(12,283)	(12,934)
Total Loans	558,295	594,323
Acquired Loans [Member] | Consumer Lines of Credit [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5,357	6,353
Acquired Loans [Member] | Consumer Lines of Credit [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,139	3,253
Acquired Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	41,417	50,570
Non- Accrual	1,176	1,353
Current	1,333,633	1,413,193
(Discount) Premium	(51,424)	(52,988)
Total Loans	1,323,626	1,410,775
Acquired Loans [Member] | Consumer Loan [Member] | 30-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	23,296	28,811
Acquired Loans [Member] | Consumer Loan [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 16,945	$ 20,406

XML

LOANS AND LEASES - Commercial Loans and Leases by Credit Quality (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	$ 21,262,397	$ 20,998,766
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	8,811,475	8,741,864
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	4,279,969	4,170,667
Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	279,582	266,720
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	39,347	17,063
Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	13,410,373	13,196,314
Originated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	16,000,597	15,345,490
Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	5,465,150	5,174,783
Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,688,120	3,495,247
Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	279,582	266,720
Originated Loans and Leases [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	39,347	17,063
Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	9,472,199	8,953,813
Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	5,261,800	5,653,276
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,346,325	3,567,081
Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	591,849	675,420
Acquired Loans [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	0	0
Acquired Loans [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	0	0
Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,938,174	4,242,501
Pass [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	5,195,183	4,922,872
Pass [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,412,745	3,266,966
Pass [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	269,837	260,235
Pass [Member] | Originated Loans and Leases [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	38,231	15,866
Pass [Member] | Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	8,915,996	8,465,939
Pass [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,877,345	3,102,788
Pass [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	520,361	603,611
Pass [Member] | Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,397,706	3,706,399
Special Mention [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	148,120	152,744
Special Mention [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	191,627	132,975
Special Mention [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,518	4,425
Special Mention [Member] | Originated Loans and Leases [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	43	43
Special Mention [Member] | Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	343,308	290,187
Special Mention [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	225,364	250,987
Special Mention [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	28,166	26,059
Special Mention [Member] | Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	253,530	277,046
Substandard [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	121,542	98,728
Substandard [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	80,803	92,091
Substandard [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	6,227	2,060
Substandard [Member] | Originated Loans and Leases [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	1,073	1,154
Substandard [Member] | Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	209,645	194,033
Substandard [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	243,402	213,089
Substandard [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	43,314	45,661
Substandard [Member] | Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	286,716	258,750
Doubtful [Member] | Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	305	439
Doubtful [Member] | Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	2,945	3,215
Doubtful [Member] | Originated Loans and Leases [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	0	0
Doubtful [Member] | Originated Loans and Leases [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	0	0
Doubtful [Member] | Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	3,250	3,654
Doubtful [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	214	217
Doubtful [Member] | Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	8	89
Doubtful [Member] | Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total commercial loans and leases	$ 222	$ 306

XML

LOANS AND LEASES - Consumer Loans by Payment Status (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Credit Quality [Line Items]
Carrying amount	$ 21,262,397	$ 20,998,766
Direct Installment [Member]
Credit Quality [Line Items]
Carrying amount	1,871,639	1,905,535
Residential Mortgages [Member]
Credit Quality [Line Items]
Carrying amount	2,762,101	2,702,691
Indirect Installment [Member]
Credit Quality [Line Items]
Carrying amount	1,524,501	1,448,433
Originated Loans and Leases [Member]
Credit Quality [Line Items]
Carrying amount	16,000,597	15,345,490
Originated Loans and Leases [Member] | Direct Installment [Member]
Credit Quality [Line Items]
Carrying amount	1,737,242	1,755,713
Originated Loans and Leases [Member] | Residential Mortgages [Member]
Credit Quality [Line Items]
Carrying amount	2,131,338	2,036,226
Originated Loans and Leases [Member] | Indirect Installment [Member]
Credit Quality [Line Items]
Carrying amount	1,524,330	1,448,268
Acquired Loans [Member]
Credit Quality [Line Items]
Carrying amount	5,261,800	5,653,276
Acquired Loans [Member] | Direct Installment [Member]
Credit Quality [Line Items]
Carrying amount	134,397	149,822
Acquired Loans [Member] | Residential Mortgages [Member]
Credit Quality [Line Items]
Carrying amount	630,763	666,465
Acquired Loans [Member] | Indirect Installment [Member]
Credit Quality [Line Items]
Carrying amount	171	165
Consumer Loan [Member] | Originated Loans and Leases [Member]
Credit Quality [Line Items]
Carrying amount	6,528,398	6,391,677
Consumer Loan [Member] | Originated Loans and Leases [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	6,489,677	6,352,285
Consumer Loan [Member] | Originated Loans and Leases [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	38,721	39,392
Consumer Loan [Member] | Originated Loans and Leases [Member] | Direct Installment [Member]
Credit Quality [Line Items]
Carrying amount	1,737,242	1,755,713
Consumer Loan [Member] | Originated Loans and Leases [Member] | Direct Installment [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	1,721,589	1,739,060
Consumer Loan [Member] | Originated Loans and Leases [Member] | Direct Installment [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	15,653	16,653
Consumer Loan [Member] | Originated Loans and Leases [Member] | Residential Mortgages [Member]
Credit Quality [Line Items]
Carrying amount	2,131,338	2,036,226
Consumer Loan [Member] | Originated Loans and Leases [Member] | Residential Mortgages [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	2,115,204	2,019,816
Consumer Loan [Member] | Originated Loans and Leases [Member] | Residential Mortgages [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	16,134	16,410
Consumer Loan [Member] | Originated Loans and Leases [Member] | Indirect Installment [Member]
Credit Quality [Line Items]
Carrying amount	1,524,330	1,448,268
Consumer Loan [Member] | Originated Loans and Leases [Member] | Indirect Installment [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	1,521,906	1,445,833
Consumer Loan [Member] | Originated Loans and Leases [Member] | Indirect Installment [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	2,424	2,435
Consumer Loan [Member] | Originated Loans and Leases [Member] | Consumer Lines of Credit [Member]
Credit Quality [Line Items]
Carrying amount	1,135,488	1,151,470
Consumer Loan [Member] | Originated Loans and Leases [Member] | Consumer Lines of Credit [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	1,130,978	1,147,576
Consumer Loan [Member] | Originated Loans and Leases [Member] | Consumer Lines of Credit [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	4,510	3,894
Consumer Loan [Member] | Acquired Loans [Member]
Credit Quality [Line Items]
Carrying amount	1,323,626	1,410,775
Consumer Loan [Member] | Acquired Loans [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	1,321,894	1,408,765
Consumer Loan [Member] | Acquired Loans [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	1,732	2,010
Consumer Loan [Member] | Acquired Loans [Member] | Direct Installment [Member]
Credit Quality [Line Items]
Carrying amount	134,397	149,822
Consumer Loan [Member] | Acquired Loans [Member] | Direct Installment [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	134,327	149,751
Consumer Loan [Member] | Acquired Loans [Member] | Direct Installment [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	70	71
Consumer Loan [Member] | Acquired Loans [Member] | Residential Mortgages [Member]
Credit Quality [Line Items]
Carrying amount	630,763	666,465
Consumer Loan [Member] | Acquired Loans [Member] | Residential Mortgages [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	630,763	666,465
Consumer Loan [Member] | Acquired Loans [Member] | Residential Mortgages [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	0	0
Consumer Loan [Member] | Acquired Loans [Member] | Indirect Installment [Member]
Credit Quality [Line Items]
Carrying amount	171	165
Consumer Loan [Member] | Acquired Loans [Member] | Indirect Installment [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	171	165
Consumer Loan [Member] | Acquired Loans [Member] | Indirect Installment [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	0	0
Consumer Loan [Member] | Acquired Loans [Member] | Consumer Lines of Credit [Member]
Credit Quality [Line Items]
Carrying amount	558,295	594,323
Consumer Loan [Member] | Acquired Loans [Member] | Consumer Lines of Credit [Member] | Performing [Member]
Credit Quality [Line Items]
Carrying amount	556,633	592,384
Consumer Loan [Member] | Acquired Loans [Member] | Consumer Lines of Credit [Member] | Non-Performing [Member]
Credit Quality [Line Items]
Carrying amount	$ 1,662	$ 1,939

XML

LOANS AND LEASES - Impaired Loans and Lease (Detail) - Originated Loans and Leases [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	$ 104,434	$ 106,476
Recorded Investment With No Specific Reserve	81,457	74,309
Recorded Investment With Specific Reserve	6,758	7,363
Total Recorded Investment	88,215	81,672
Specific Reserve	3,250	3,654
Average Recorded Investment	87,009	88,636
Commercial Real Estate [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	30,584	27,718
Recorded Investment With No Specific Reserve	25,478	21,748
Recorded Investment With Specific Reserve	1,751	2,906
Total Recorded Investment	27,229	24,654
Specific Reserve	305	439
Average Recorded Investment	25,988	24,413
Commercial and Industrial [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	26,034	29,307
Recorded Investment With No Specific Reserve	15,859	11,595
Recorded Investment With Specific Reserve	5,007	4,457
Total Recorded Investment	20,866	16,052
Specific Reserve	2,945	3,215
Average Recorded Investment	20,479	23,907
Commercial Leases [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	1,399	1,574
Recorded Investment With No Specific Reserve	1,399	1,574
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	1,399	1,574
Specific Reserve	0	0
Average Recorded Investment	1,486	1,386
Other [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	0	0
Recorded Investment With No Specific Reserve	0	0
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	0	0
Specific Reserve	0	0
Average Recorded Investment	0	0
Total Commercial Loans and Leases [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	58,017	58,599
Recorded Investment With No Specific Reserve	42,736	34,917
Recorded Investment With Specific Reserve	6,758	7,363
Total Recorded Investment	49,494	42,280
Specific Reserve	3,250	3,654
Average Recorded Investment	47,953	49,706
Direct Installment [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	18,623	19,375
Recorded Investment With No Specific Reserve	15,653	16,653
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	15,653	16,653
Specific Reserve	0	0
Average Recorded Investment	16,153	16,852
Residential Mortgages [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	17,448	17,754
Recorded Investment With No Specific Reserve	16,134	16,410
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	16,134	16,410
Specific Reserve	0	0
Average Recorded Investment	16,272	15,984
Indirect Installment [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	4,648	5,709
Recorded Investment With No Specific Reserve	2,424	2,435
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	2,424	2,435
Specific Reserve	0	0
Average Recorded Investment	2,429	2,279
Consumer Lines of Credit [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	5,698	5,039
Recorded Investment With No Specific Reserve	4,510	3,894
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	4,510	3,894
Specific Reserve	0	0
Average Recorded Investment	4,202	3,815
Consumer Loan [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	46,417	47,877
Recorded Investment With No Specific Reserve	38,721	39,392
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	38,721	39,392
Specific Reserve	0	0
Average Recorded Investment	$ 39,056	$ 38,930

XML

LOANS AND LEASES - Additional Allowance for Credit Losses Relating to Acquired Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	$ 179,247	$ 175,380	$ 160,782	$ 158,059
Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	6,837	6,698	$ 6,568	$ 7,268
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	2,732	4,976
Acquired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	1,785	(415)
Acquired Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	4,517	4,561
Acquired Loans [Member] | Direct Installment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	1,804	1,553
Acquired Loans [Member] | Residential Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	518	484
Acquired Loans [Member] | Indirect Installment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	240	177
Acquired Loans [Member] | Consumer Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	(242)	(77)
Acquired Loans [Member] | Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance on acquired loans	$ 2,320	$ 2,137

XML

LOANS AND LEASES - Summary of Payment Status of TDRs (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	$ 55,251	$ 53,991
Originated Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	51,476	50,183
Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	3,775	3,808
Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	19,774	19,804
Performing [Member] | Originated Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	19,525	19,538
Performing [Member] | Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	249	266
Non-Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	24,452	23,481
Non-Performing [Member] | Originated Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	21,283	20,173
Non-Performing [Member] | Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	3,169	3,308
Non-Accrual [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	11,025	10,706
Non-Accrual [Member] | Originated Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	10,668	10,472
Non-Accrual [Member] | Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings ("TDRs")	$ 357	$ 234

XML

LOANS AND LEASES - Reserve for Commercial TDRs Included in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Total allowance on acquired loans	$ 179,247	$ 175,380	$ 160,782	$ 158,059
Specific Reserves for Commercial TDRs [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Total allowance on acquired loans	726	95
Pooled Reserves for Individual Commercial Loans [Member] | Total Commercial Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Total allowance on acquired loans	$ 519	$ 469

XML

LOANS AND LEASES - Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Contract	Mar. 31, 2017 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	225	207
Pre- Modification Outstanding Recorded Investment	$ 4,016	$ 2,524
Post- Modification Outstanding Recorded Investment	$ 3,417	$ 2,440
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	1
Pre- Modification Outstanding Recorded Investment	$ 328	$ 114
Post- Modification Outstanding Recorded Investment	$ 328	$ 109
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	0
Pre- Modification Outstanding Recorded Investment	$ 1,687	$ 0
Post- Modification Outstanding Recorded Investment	$ 1,230	$ 0
Total Commercial Loans and Leases [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2	1
Pre- Modification Outstanding Recorded Investment	$ 2,015	$ 114
Post- Modification Outstanding Recorded Investment	$ 1,558	$ 109
Direct Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	182	171
Pre- Modification Outstanding Recorded Investment	$ 1,135	$ 1,488
Post- Modification Outstanding Recorded Investment	$ 1,056	$ 1,412
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	11	8
Pre- Modification Outstanding Recorded Investment	$ 501	$ 163
Post- Modification Outstanding Recorded Investment	$ 504	$ 176
Indirect Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	9	5
Pre- Modification Outstanding Recorded Investment	$ 13	$ 17
Post- Modification Outstanding Recorded Investment	$ 12	$ 14
Consumer Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	21	22
Pre- Modification Outstanding Recorded Investment	$ 352	$ 742
Post- Modification Outstanding Recorded Investment	$ 287	$ 729
Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	223	206
Pre- Modification Outstanding Recorded Investment	$ 2,001	$ 2,410
Post- Modification Outstanding Recorded Investment	$ 1,859	$ 2,331

XML

LOANS AND LEASES - Originated Troubled Debt Restructurings, Payment Default (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Contract	Mar. 31, 2017 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	55	38
Recorded Investment | $	$ 526	$ 350
Direct Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	45	29
Recorded Investment | $	$ 130	$ 82
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	4	2
Recorded Investment | $	$ 190	$ 224
Indirect Installment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	5	6
Recorded Investment | $	$ 10	$ 10
Consumer Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	1
Recorded Investment | $	$ 196	$ 34
Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	55	38
Recorded Investment | $	$ 526	$ 350

XML

ALLOWANCE FOR CREDIT LOSSES - Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	$ 175,380	$ 158,059
Charge- Offs	(13,911)	(11,294)
Recoveries	3,283	3,167
Net Charge- Offs	(10,628)	(8,127)
Provision for credit losses	14,495	10,850
Balance at End of Period	179,247	160,782
Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	168,682	150,791
Charge- Offs	(13,602)	(10,812)
Recoveries	2,560	2,898
Net Charge- Offs	(11,042)	(7,914)
Provision for credit losses	14,770	11,337
Balance at End of Period	172,410	154,214
Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	6,698	7,268
Charge- Offs	(309)	(482)
Recoveries	723	269
Net Charge- Offs	414	(213)
Provision for credit losses	(275)	(487)
Balance at End of Period	6,837	6,568
Commercial Real Estate [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	50,281	46,635
Charge- Offs	(225)	(988)
Recoveries	337	361
Net Charge- Offs	112	(627)
Provision for credit losses	3,123	381
Balance at End of Period	53,516	46,389
Commercial Real Estate [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	4,976
Balance at End of Period	2,732
Commercial and Industrial [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	51,963	47,991
Charge- Offs	(5,920)	(2,463)
Recoveries	369	474
Net Charge- Offs	(5,551)	(1,989)
Provision for credit losses	6,601	7,568
Balance at End of Period	53,013	53,570
Commercial and Industrial [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	(415)
Balance at End of Period	1,785
Commercial Leases [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	5,646	3,280
Charge- Offs	(171)	(506)
Recoveries	10	1
Net Charge- Offs	(161)	(505)
Provision for credit losses	630	738
Balance at End of Period	6,115	3,513
Other [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	1,843	1,392
Charge- Offs	(797)	(973)
Recoveries	297	327
Net Charge- Offs	(500)	(646)
Provision for credit losses	652	1,063
Balance at End of Period	1,995	1,809
Total Commercial Loans and Leases [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	109,733	99,298
Charge- Offs	(7,113)	(4,930)
Recoveries	1,013	1,163
Net Charge- Offs	(6,100)	(3,767)
Provision for credit losses	11,006	9,750
Balance at End of Period	114,639	105,281
Total Commercial Loans and Leases [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	4,561
Balance at End of Period	4,517
Direct Installment [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	20,936	21,391
Charge- Offs	(3,470)	(2,874)
Recoveries	440	628
Net Charge- Offs	(3,030)	(2,246)
Provision for credit losses	2,222	1,065
Balance at End of Period	20,128	20,210
Direct Installment [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	1,553
Balance at End of Period	1,804
Residential Mortgages [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	15,507	10,082
Charge- Offs	(79)	(180)
Recoveries	91	161
Net Charge- Offs	12	(19)
Provision for credit losses	(239)	147
Balance at End of Period	15,280	10,210
Residential Mortgages [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	484
Balance at End of Period	518
Indirect Installment [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	11,967	10,564
Charge- Offs	(2,409)	(2,370)
Recoveries	895	781
Net Charge- Offs	(1,514)	(1,589)
Provision for credit losses	1,502	655
Balance at End of Period	11,955	9,630
Indirect Installment [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	177
Balance at End of Period	240
Consumer Lines of Credit [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	10,539	9,456
Charge- Offs	(531)	(458)
Recoveries	121	165
Net Charge- Offs	(410)	(293)
Provision for credit losses	279	(280)
Balance at End of Period	10,408	8,883
Consumer Lines of Credit [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	(77)
Balance at End of Period	(242)
Consumer Loan [Member] | Originated Loans and Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	58,949	51,493
Charge- Offs	(6,489)	(5,882)
Recoveries	1,547	1,735
Net Charge- Offs	(4,942)	(4,147)
Provision for credit losses	3,764	1,587
Balance at End of Period	57,771	48,933
Consumer Loan [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	2,137
Balance at End of Period	2,320
Purchased Credit-Impaired Loans [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	635	572
Charge- Offs	0	0
Recoveries	0	0
Net Charge- Offs	0	0
Provision for credit losses	(13)	88
Balance at End of Period	622	660
Other Acquired Loans [Member] | Acquired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at Beginning of Period	6,063	6,696
Charge- Offs	(309)	(482)
Recoveries	723	269
Net Charge- Offs	414	(213)
Provision for credit losses	(262)	(575)
Balance at End of Period	$ 6,215	$ 5,908

XML

ALLOWANCE FOR CREDIT LOSSES - Individual and Collective Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	$ 21,262,397	$ 20,998,766
Commercial Real Estate [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	8,811,475	8,741,864
Commercial and Industrial [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	4,279,969	4,170,667
Commercial Leases [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	279,582	266,720
Other [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	39,347	17,063
Total Commercial Loans and Leases [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	13,410,373	13,196,314
Direct Installment [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	1,871,639	1,905,535
Residential Mortgages [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	2,762,101	2,702,691
Indirect Installment [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	1,524,501	1,448,433
Consumer Lines of Credit [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	1,693,783	1,745,793
Consumer Loan [Member]
Valuation Allowance [Line Items]
Originated loans and leases outstanding, loans and leases	7,852,024	7,802,452
Originated Loans and Leases [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	3,250	3,654
Originated allowance, collectively evaluated for impairment	169,160	165,028
Originated loans and leases outstanding, loans and leases	16,000,597	15,345,490
Originated loans and leases outstanding, individually evaluated for impairment	23,172	20,986
Originated loans and leases outstanding, collectively evaluated for impairment	15,977,425	15,324,504
Originated Loans and Leases [Member] | Commercial Real Estate [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	305	439
Originated allowance, collectively evaluated for impairment	53,211	49,842
Originated loans and leases outstanding, loans and leases	5,465,150	5,174,783
Originated loans and leases outstanding, individually evaluated for impairment	12,292	11,114
Originated loans and leases outstanding, collectively evaluated for impairment	5,452,858	5,163,669
Originated Loans and Leases [Member] | Commercial and Industrial [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	2,945	3,215
Originated allowance, collectively evaluated for impairment	50,068	48,748
Originated loans and leases outstanding, loans and leases	3,688,120	3,495,247
Originated loans and leases outstanding, individually evaluated for impairment	10,880	9,872
Originated loans and leases outstanding, collectively evaluated for impairment	3,677,240	3,485,375
Originated Loans and Leases [Member] | Commercial Leases [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	0	0
Originated allowance, collectively evaluated for impairment	6,115	5,646
Originated loans and leases outstanding, loans and leases	279,582	266,720
Originated loans and leases outstanding, individually evaluated for impairment	0	0
Originated loans and leases outstanding, collectively evaluated for impairment	279,582	266,720
Originated Loans and Leases [Member] | Other [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	0	0
Originated allowance, collectively evaluated for impairment	1,995	1,843
Originated loans and leases outstanding, loans and leases	39,347	17,063
Originated loans and leases outstanding, individually evaluated for impairment	0	0
Originated loans and leases outstanding, collectively evaluated for impairment	39,347	17,063
Originated Loans and Leases [Member] | Total Commercial Loans and Leases [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	3,250	3,654
Originated allowance, collectively evaluated for impairment	111,389	106,079
Originated loans and leases outstanding, loans and leases	9,472,199	8,953,813
Originated loans and leases outstanding, individually evaluated for impairment	23,172	20,986
Originated loans and leases outstanding, collectively evaluated for impairment	9,449,027	8,932,827
Originated Loans and Leases [Member] | Direct Installment [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	0	0
Originated allowance, collectively evaluated for impairment	20,128	20,936
Originated loans and leases outstanding, loans and leases	1,737,242	1,755,713
Originated loans and leases outstanding, individually evaluated for impairment	0	0
Originated loans and leases outstanding, collectively evaluated for impairment	1,737,242	1,755,713
Originated Loans and Leases [Member] | Residential Mortgages [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	0	0
Originated allowance, collectively evaluated for impairment	15,280	15,507
Originated loans and leases outstanding, loans and leases	2,131,338	2,036,226
Originated loans and leases outstanding, individually evaluated for impairment	0	0
Originated loans and leases outstanding, collectively evaluated for impairment	2,131,338	2,036,226
Originated Loans and Leases [Member] | Indirect Installment [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	0	0
Originated allowance, collectively evaluated for impairment	11,955	11,967
Originated loans and leases outstanding, loans and leases	1,524,330	1,448,268
Originated loans and leases outstanding, individually evaluated for impairment	0	0
Originated loans and leases outstanding, collectively evaluated for impairment	1,524,330	1,448,268
Originated Loans and Leases [Member] | Consumer Lines of Credit [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	0	0
Originated allowance, collectively evaluated for impairment	10,408	10,539
Originated loans and leases outstanding, loans and leases	1,135,488	1,151,470
Originated loans and leases outstanding, individually evaluated for impairment	0	0
Originated loans and leases outstanding, collectively evaluated for impairment	1,135,488	1,151,470
Originated Loans and Leases [Member] | Consumer Loan [Member]
Valuation Allowance [Line Items]
Originated allowance, individually evaluated for impairment	0	0
Originated allowance, collectively evaluated for impairment	57,771	58,949
Originated loans and leases outstanding, loans and leases	6,528,398	6,391,677
Originated loans and leases outstanding, individually evaluated for impairment	0	0
Originated loans and leases outstanding, collectively evaluated for impairment	$ 6,528,398	$ 6,391,677

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LOAN SERVICING - Mortgage Servicing Rights Activity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Mortgage loans sold with servicing retained	$ 3,417,642		$ 3,256,548
Mortgage loans sold with servicing retained	236,893	$ 129,843
Pretax gains resulting from above loan sales	3,798	3,638
Mortgage servicing fees	2,174	1,603
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	29,053	13,521
Fair value of MSRs acquired	0	8,553
Additions	2,710	1,454
Payoffs and curtailments	(405)	(139)
Amortization	(567)	(523)
Balance at end of period	30,791	22,866
Loan servicing rights, fair value, start	32,419	17,546
Loan servicing rights, fair value, end	36,445	26,962
Small Business Administration Loans [Member]
Servicing Assets at Fair Value [Line Items]
Mortgage loans sold with servicing retained	300,857		$ 305,977
Mortgage loans sold with servicing retained	12,288	0
Pretax gains resulting from above loan sales	1,101	0
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	5,058	0
Additions	388	0
Amortization	(294)	(60)
Balance at end of period	5,062	5,339
Loan servicing rights, fair value, start	5,058	0
Loan servicing rights, fair value, end	$ 5,062	$ 5,339

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LOAN SERVICING - Activity in SBA-Guaranteed Loan Servicing Asset (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Servicing Assets at Fair Value [Line Items]
SBA servicing fees	$ 30,077	$ 24,581
SBA-Guaranteed Loan Servicing [Member]
Servicing Assets at Fair Value [Line Items]
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance	400
SBA loans sold to investors with servicing retained	300,857		$ 305,977
SBA loans sold with servicing retained	12,288	0
Gain from sale of SBA loan, pretax	1,101	0
SBA servicing fees	750	115
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period	5,058	0
Fair value of servicing rights acquired	0	5,399
Additions	388	0
Impairment (charge) / recovery	(90)	0
Amortization	(294)	(60)
Balance at end of period	5,062	5,339
Loan servicing rights, fair value, start	5,058	0
Loan servicing rights, fair value, end	$ 5,062	$ 5,339

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LOAN SERVICING - Sensitivity of Fair Value to Changes in key Assumptions (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Mortgage Servicing Rights [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Weighted average life (months)	84 months 16 days		80 months 12 days
Constant prepayment rate (annualized)	9.10%		9.90%
Discount rate	9.90%		9.90%
Sensitivity analysis of fair value, change in interest rates, plus .25%	$ 1,179		$ 1,737
Sensitivity analysis of fair value, change in interest rates, plus .50%	2,131		3,220
Sensitivity analysis of fair value, change in interest rates, minus .25%	1,476		1,937
Sensitivity analysis of fair value, change in interest rates, minus .50%	$ 3,237		$ 4,007
SBA-Guaranteed Loan Servicing [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Weighted average life (months)	61 months		63 months 16 days
Constant prepayment rate (annualized)	10.01%	9.29%
Discount rate	14.76%	14.87%
Effect on fair value due to 10% adverse change of consistent repayment rate	$ (158)		$ (145)
Effect on fair value due to 20% adverse change of consistent repayment rate	(309)		(284)
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 1 percent adverse change in prepayment speed	0		0
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 2 percent adverse change in prepayment speed	0		0
Effect on fair value due to 10% adverse change of discount rate	0		0
Effect on fair value due to 20% adverse change of discount rate	0		0
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 1 percent adverse change in discount rate	(148)		(147)
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 2 percent adverse change in discount rate	$ (287)		$ (286)

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BORROWINGS - Summary of Short-Term Borrowings (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Securities sold under repurchase agreements	$ 280,492	$ 256,017
Federal Home Loan Bank advances	1,555,000	2,285,000
Federal funds purchased	1,830,000	1,000,000
Subordinated notes	136,988	137,320
Total short-term borrowings	$ 3,802,480	$ 3,678,337

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BORROWINGS - Summary of Long-Term Borrowings (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Federal Home Loan Bank advances	$ 300,053	$ 310,061
Subordinated notes	89,523	87,614
Junior subordinated debt	110,466	110,347
Other subordinated debt	159,848	160,151
Total long-term borrowings	$ 659,890	$ 668,173

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BORROWINGS - Additional Information (Detail) - FHLB [Member] - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Credit available with FHLB	$ 7,820,000,000
Credit with FHLB utilized	$ 1,900,000,000
Federal Home Loan Bank advances are scheduled to mature periodically through the year	2021
Minimum [Member]
Debt Instrument [Line Items]
Effective interest rates	1.39%	0.95%
Maximum [Member]
Debt Instrument [Line Items]
Effective interest rates	4.19%	4.19%

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BORROWINGS - Junior Subordinated Debt Trusts (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 110,466	$ 110,347
Trust Preferred Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	115,500
Common Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	3,885
F.N.B. Statutory Trust II [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 22,165
Interest Rate	3.77%
F.N.B. Statutory Trust II [Member] | LIBOR [Member]
Subordinated Borrowing [Line Items]
Basis spread on variable rate	1.65%
F.N.B. Statutory Trust II [Member] | Trust Preferred Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 21,500
F.N.B. Statutory Trust II [Member] | Common Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	665
Omega Financial Capital Trust I [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 26,483
Interest Rate	3.92%
Omega Financial Capital Trust I [Member] | LIBOR [Member]
Subordinated Borrowing [Line Items]
Basis spread on variable rate	2.19%
Omega Financial Capital Trust I [Member] | Trust Preferred Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 26,000
Omega Financial Capital Trust I [Member] | Common Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	1,114
Yadkin Valley Statutory Trust I [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 20,925
Interest Rate	3.44%
Yadkin Valley Statutory Trust I [Member] | LIBOR [Member]
Subordinated Borrowing [Line Items]
Basis spread on variable rate	1.32%
Yadkin Valley Statutory Trust I [Member] | Trust Preferred Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 25,000
Yadkin Valley Statutory Trust I [Member] | Common Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	774
FNB Financial Services Capital Trust I [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 21,859
Interest Rate	3.79%
FNB Financial Services Capital Trust I [Member] | LIBOR [Member]
Subordinated Borrowing [Line Items]
Basis spread on variable rate	1.46%
FNB Financial Services Capital Trust I [Member] | Trust Preferred Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 25,000
FNB Financial Services Capital Trust I [Member] | Common Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	774
American Community Capital Trust II [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 10,446
Interest Rate	5.11%
American Community Capital Trust II [Member] | LIBOR [Member]
Subordinated Borrowing [Line Items]
Basis spread on variable rate	2.80%
American Community Capital Trust II [Member] | Trust Preferred Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 10,000
American Community Capital Trust II [Member] | Common Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	310
Crescent Financial Capital Trust I [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 8,588
Interest Rate	4.82%
Crescent Financial Capital Trust I [Member] | LIBOR [Member]
Subordinated Borrowing [Line Items]
Basis spread on variable rate	3.10%
Crescent Financial Capital Trust I [Member] | Trust Preferred Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 8,000
Crescent Financial Capital Trust I [Member] | Common Securities [Member]
Subordinated Borrowing [Line Items]
Junior subordinated debt	$ 248

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amounts and Gross Fair Values (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Notional amount	$ 5,931,943	$ 5,628,119
Derivative asset, not offset against collateral	3,507	1,448
Derivative liability, not offset against collateral	12,779	13,581
Derivative asset, not subject to master netting arrangement	16,785	29,099
Derivative liability, not subject to master netting arrangement	39,113	15,616
Fair value, asset	20,292	30,547
Fair value, liability	51,892	29,197
Interest rate contracts - designated [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, not offset against collateral	0	228
Derivative liability, not offset against collateral	3,662	1,982
Interest rate swaps - not designated [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, not offset against collateral	3,481	1,169
Derivative liability, not offset against collateral	9,117	11,599
Derivative asset, not subject to master netting arrangement	15,176	27,233
Derivative liability, not subject to master netting arrangement	38,787	15,303
Equity contracts - not designated [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, not offset against collateral	26	51
Derivative liability, not offset against collateral	0	0
Derivative asset, not subject to master netting arrangement	0	0
Derivative liability, not subject to master netting arrangement	26	51
Interest rate lock commitments – not designated [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, not subject to master netting arrangement	1,380	1,594
Derivative liability, not subject to master netting arrangement	5	5
Forward delivery commitments – not designated [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, not subject to master netting arrangement	209	233
Derivative liability, not subject to master netting arrangement	231	148
Credit risk contracts - not designated [Member]
Derivatives, Fair Value [Line Items]
Notional amount	128,700
Derivative asset, not subject to master netting arrangement	20	39
Derivative liability, not subject to master netting arrangement	64	109
Subject to Master Netting Arrangements [Member]
Derivatives, Fair Value [Line Items]
Notional amount	3,128,416	2,951,622
Subject to Master Netting Arrangements [Member] | Interest rate contracts - designated [Member]
Derivatives, Fair Value [Line Items]
Notional amount	705,000	705,000
Subject to Master Netting Arrangements [Member] | Interest rate swaps - not designated [Member]
Derivatives, Fair Value [Line Items]
Notional amount	2,422,236	2,245,442
Subject to Master Netting Arrangements [Member] | Equity contracts - not designated [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,180	1,180
Not Subject to Master Netting Arrangements [Member]
Derivatives, Fair Value [Line Items]
Notional amount	2,803,527	2,676,497
Not Subject to Master Netting Arrangements [Member] | Interest rate swaps - not designated [Member]
Derivatives, Fair Value [Line Items]
Notional amount	2,422,236	2,245,442
Not Subject to Master Netting Arrangements [Member] | Equity contracts - not designated [Member]
Derivatives, Fair Value [Line Items]
Notional amount	1,180	1,180
Not Subject to Master Netting Arrangements [Member] | Interest rate lock commitments – not designated [Member]
Derivatives, Fair Value [Line Items]
Notional amount	78,368	88,107
Not Subject to Master Netting Arrangements [Member] | Forward delivery commitments – not designated [Member]
Derivatives, Fair Value [Line Items]
Notional amount	94,996	106,572
Not Subject to Master Netting Arrangements [Member] | Credit risk contracts - not designated [Member]
Derivatives, Fair Value [Line Items]
Notional amount	$ 206,747	$ 235,196

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Key Data Related to Interest Rate (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 5,931,943	$ 5,628,119
Fair value included in other assets	20,292	30,547
Fair value included in other liabilities	51,892	29,197
Designated as Hedging Instrument [Member] | Interest rate contracts - designated [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	705,000	705,000
Fair value included in other assets	0	228
Designated as Hedging Instrument [Member] | Trading Liabilities [Member] | Interest rate contracts - designated [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value included in other liabilities	3,662	1,982
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	4,844,472	4,490,884
Fair value included in other assets	18,657	28,402
Not Designated as Hedging Instrument [Member] | Trading Liabilities [Member] | Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value included in other liabilities	$ 47,904	$ 26,902

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Amounts Reclassified from AOCI (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassified from AOCI to interest expense	$ 46,822	$ 21,941
Reclassification out of Accumulated Other Comprehensive Income [Member] | Total [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassified from AOCI to interest income	93
Reclassified from AOCI to interest expense	(129)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net of Tax [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassified from AOCI to interest income	73
Reclassified from AOCI to interest expense	$ (102)

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Derivative [Line Items]
Notional amount	$ 5,931,943,000		$ 5,628,119,000
Additional amount in excess of posted collateral required in case of breached agreements	$ 600,000		900,000
Interest rate contracts [Member]
Derivative [Line Items]
Maximum length of time hedged in interest rate cash flow hedge	5 years
Period to reclassification of cash flow hedge gain loss	12 months
Derivative gains to be reclassified within twelve months	$ 3,200,000
Derivative gains to be reclassified within twelve months, net of tax	2,500,000
Derivative gain or loses excluded from assessment of hedge effectiveness	0
Hedge ineffectiveness	0	$ 0
Gains or losses from cash flow hedge derivatives reclassified to earnings	$ 0	$ 0
Interest Rate Lock Commitments [Member] | Minimum [Member]
Derivative [Line Items]
Lock in period for interest rates	30 days
Interest Rate Lock Commitments [Member] | Maximum [Member]
Derivative [Line Items]
Lock in period for interest rates	270 days
Credit risk contracts - not designated [Member]
Derivative [Line Items]
Notional amount	$ 128,700,000
Maximum exposure under credit risk agreement assuming customer default	60,000		100,000
Credit risk derivatives, purchased at fair value	20,000		40,000
Credit risk derivatives, sold at fair value	$ 60,000		$ 100,000
Credit risk contracts - not designated [Member] | Minimum [Member]
Derivative [Line Items]
Risk participation agreements, term	3 months
Credit risk contracts - not designated [Member] | Maximum [Member]
Derivative [Line Items]
Risk participation agreements, term	9 years

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 3,507	$ 1,448
Financial Instruments	3,477	1,448
Cash Collateral	0	0
Net Amount	30	0
Interest rate contracts - designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	0	228
Financial Instruments	0	228
Cash Collateral	0	0
Net Amount	0	0
Interest rate swaps - not designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	3,481	1,169
Financial Instruments	3,451	1,169
Cash Collateral	0	0
Net Amount	30	0
Equity contracts - not designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	26	51
Financial Instruments	26	51
Cash Collateral	0	0
Net Amount	$ 0	$ 0

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 12,779	$ 13,581
Financial Instruments	12,254	12,922
Cash Collateral	0	0
Net Amount	525	659
Interest rate contracts - designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	3,662	1,982
Financial Instruments	3,662	1,982
Cash Collateral	0	0
Net Amount	0	0
Interest rate swaps - not designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	9,117	11,599
Financial Instruments	8,592	10,940
Cash Collateral	0	0
Net Amount	525	659
Equity contracts - not designated [Member]
Derivative [Line Items]
Net Amount Presented in the Balance Sheet	$ 0	$ 0

XML

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Derivative Financial Instruments on Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest Rate Contracts [Member] | Interest Income - Loans and Leases [Member]
Derivative [Line Items]
Derivative financial instrument, net	$ 93	$ 506
Interest Rate Contracts [Member] | Interest Expense - Short-term Borrowings [Member]
Derivative [Line Items]
Derivative financial instrument, net	(129)	148
Interest Rate Swap [Member] | Other Income [Member]
Derivative [Line Items]
Derivative financial instrument, net	(160)	(219)
Credit risk contracts - not designated [Member] | Other Income [Member]
Derivative [Line Items]
Derivative financial instrument, net	$ 27	$ 19

XML

COMMITMENTS, CREDIT RISK AND CONTINGENCIES - Off-Balance Sheet Credit Risk (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Extended credit and standby letters of credit	$ 136,661	$ 132,904
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Extended credit and standby letters of credit	$ 7,097,958	$ 6,957,822

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COMMITMENTS, CREDIT RISK AND CONTINGENCIES - Additional Information (Detail)	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Percentage of Commitments to extend credit dependent upon the financial condition of the customers	76.40%

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STOCK INCENTIVE PLANS - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares available under incentive compensation plans (in shares) | shares	2,636,450
Unrecognized compensation expense	$ 9,752
Intrinsic value of outstanding and exercisable stock options	3,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	9,800
Amount subject to accelerated vesting under Incentive Compensation Plan	$ 600
Service-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of awards issued, years	3 years
Unrecognized compensation expense	$ 5,691
Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of awards issued, years	3 years
Unrecognized compensation expense	$ 4,061
Performance-Based Awards [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock percentage of number of units issued	0.00%
Performance-Based Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock percentage of number of units issued	175.00%
Market Based Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock percentage of number of units issued	100.00%

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STOCK INCENTIVE PLANS - Restricted Stock Awards Activity (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, unvested awards outstanding at end of period	1,964,711
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, unvested awards outstanding at beginning of period	1,975,862	1,836,363
Shares, vested	(7,631)	(243,982)
Shares, forfeited/expired	(19,893)	(2,950)
Shares, dividend reinvestment	16,373	12,253
Shares, unvested awards outstanding at end of period	1,964,711	1,601,684
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant price, invested awards outstanding at beginning of period (in USD per share)	$ 13.64	$ 12.97
Weighted average grant price, vested (in USD per share)	12.83	11.83
Weighted average grant price, forfeited/expired (in USD per share)	14.02	13.00
Weighted average grant price, dividend reinvestment (in USD per share)	14.37	14.54
Weighted average grant price, invested awards outstanding at end of period (in USD per share)	$ 13.65	$ 13.16

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STOCK INCENTIVE PLANS - Schedule of Certain Information Related to Restricted Stock Awards (Detail) - Restricted Stock [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1,939	$ 1,760
Tax benefit related to stock-based compensation expense	407	616
Fair value of awards vested	$ 110	$ 3,802

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STOCK INCENTIVE PLANS - Components of Restricted Stock Awards (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock awards (in shares) | shares	1,964,711
Unrecognized compensation expense	$ 9,752
Intrinsic value	$ 26,425
Weighted average remaining life (in years)	1 year 7 months 19 days
Service-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock awards (in shares) | shares	1,050,062
Unrecognized compensation expense	$ 5,691
Intrinsic value	$ 14,123
Weighted average remaining life (in years)	1 year 9 months 2 days
Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock awards (in shares) | shares	914,649
Unrecognized compensation expense	$ 4,061
Intrinsic value	$ 12,302
Weighted average remaining life (in years)	1 year 5 months 30 days

XML

STOCK INCENTIVE PLANS - Stock Options Awards Activity (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Shares, options outstanding at beginning of period	722,650	892,532
Shares, assumed from acquisitions	0	207,645
Shares, exercised	(163,035)	(131,792)
Shares, forfeited/expired	(237)	(49,281)
Shares, options outstanding and exercisable at end of period	559,378	919,104
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, options outstanding at beginning of period (in USD per share)	$ 7.96	$ 8.95
Weighted average exercise price, assumed from acquisitions (in USD per share)	0.00	8.92
Weighted average exercise price, exercised (in USD per share)	7.79	9.44
Weighted average exercise price, forfeited/expired (in USD per share)	10.72	10.91
Weighted average exercise price, options outstanding and exercisable at end of period (in USD per share)	$ 8.03	$ 8.77

XML

RETIREMENT PLANS - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018 RetirementPlans
Retirement Benefits [Abstract]
Percent of employer match	100.00%
Employee contribution percentage	6.00%
Additional discretionary contribution, annual financial goals, percentage	3.00%
Number of supplemental non qualified retirement plans	2

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RETIREMENT PLANS - Contribution Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Retirement Benefits [Abstract]
401(k) contribution expense	$ 3,610	$ 2,767

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RETIREMENT PLANS - Net Periodic Benefit Credit (Detail) - Defined Benefit Plans [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ (4)	$ (4)
Interest cost	1,560	1,477
Expected return on plan assets	(2,895)	(2,427)
Amortization:
Unrecognized prior service cost	0	2
Unrecognized loss	623	628
Net periodic pension credit	$ (716)	$ (324)

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INCOME TAXES - Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Current, federal taxes	$ 17,700	$ 6,688
Current, state taxes	1,704	499
Total current income taxes	19,404	7,187
Deferred, federal taxes	1,902	1,690
Deferred, state taxes	(38)	(2,393)
Total deferred income taxes	1,864	(703)
Income taxes	$ 21,268	$ 6,484
Statutory tax rate	21.00%	35.00%
Effective tax rate	19.70%	22.00%

XML

INCOME TAXES (Details)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Effective tax rate	19.70%	22.00%

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OTHER COMPREHENSIVE INCOME (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 4,409,194
Balance at end of period	4,433,453
Unrealized Net Losses on Debt Securities Available for Sale [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(29,626)
Other comprehensive (loss) income before reclassifications	(29,787)
Amounts reclassified from AOCI	0
Net current period other comprehensive (loss) income	(29,787)
Balance at end of period	(59,413)
Unrealized Net Gains (Losses) on Derivative Instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	5,407
Other comprehensive (loss) income before reclassifications	3,804
Amounts reclassified from AOCI	(173)
Net current period other comprehensive (loss) income	3,631
Balance at end of period	9,038
Unrecognized Pension and Postretirement Obligations [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(58,833)
Other comprehensive (loss) income before reclassifications	484
Amounts reclassified from AOCI	0
Net current period other comprehensive (loss) income	484
Balance at end of period	(58,349)
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(83,052)
Other comprehensive (loss) income before reclassifications	(25,499)
Amounts reclassified from AOCI	(173)
Net current period other comprehensive (loss) income	(25,672)
Balance at end of period	$ (108,724)

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EARNINGS PER COMMON SHARE - Computation of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 86,762	$ 22,979
Less: Preferred stock dividends	2,010	2,010
Net Income Available to Common Stockholders	$ 84,752	$ 20,969
Basic weighted average common shares outstanding	323,740,956	237,379,260
Net effect of dilutive stock options, warrants and restricted stock	2,026,012	1,882,423
Diluted weighted average common shares outstanding	325,766,968	239,261,683
Basic (in USD per share)	$ 0.26	$ 0.09
Diluted (in USD per share)	$ 0.26	$ 0.09

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EARNINGS PER COMMON SHARE - Average Shares Excluded from Earnings Per Common Share (Detail) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Average shares excluded from the diluted earnings per common share calculation	21	81,755

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CASH FLOW INFORMATION (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Interest paid on deposits and other borrowings	$ 46,540	$ 18,606
Transfers of loans to other real estate owned	$ 3,954	$ 20,517

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BUSINESS SEGMENTS - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018 Segment
Segment Reporting [Abstract]
Number of reportable segments	4

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BUSINESS SEGMENTS - Financial Information for Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Interest income	$ 272,927	$ 194,693
Interest expense	46,822	21,941
Net Interest Income	226,105	172,752
Provision for credit losses	14,495	10,850
Non-interest income	67,503	55,116
Non-interest expense	166,865	184,457
Amortization of intangibles	4,218	3,098
Income tax expense (benefit)	21,268	6,484
Net income (loss)	86,762	22,979
Total assets	31,652,353	30,190,695	$ 31,417,635
Total intangibles	2,339,139	2,356,799
Operating Segments [Member] | Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income	263,587	185,381
Interest expense	42,360	18,865
Net Interest Income	221,227	166,516
Provision for credit losses	12,412	9,064
Non-interest income	53,312	40,716
Non-interest expense	148,667	168,283
Amortization of intangibles	4,105	2,982
Income tax expense (benefit)	21,720	6,311
Net income (loss)	87,635	20,592
Total assets	31,424,150	29,978,061
Total intangibles	2,315,127	2,332,352
Operating Segments [Member] | Wealth Management [Member]
Segment Reporting Information [Line Items]
Interest income	0	0
Interest expense	0	0
Net Interest Income	0	0
Provision for credit losses	0	0
Non-interest income	11,002	9,549
Non-interest expense	8,278	7,540
Amortization of intangibles	61	61
Income tax expense (benefit)	589	711
Net income (loss)	2,074	1,237
Total assets	25,129	22,130
Total intangibles	10,128	10,353
Operating Segments [Member] | Insurance [Member]
Segment Reporting Information [Line Items]
Interest income	20	20
Interest expense	0	0
Net Interest Income	20	20
Provision for credit losses	0	0
Non-interest income	4,303	4,325
Non-interest expense	3,711	3,315
Amortization of intangibles	52	55
Income tax expense (benefit)	124	347
Net income (loss)	436	628
Total assets	20,529	20,514
Total intangibles	12,075	12,285
Operating Segments [Member] | Consumer Finance [Member]
Segment Reporting Information [Line Items]
Interest income	9,294	9,902
Interest expense	910	922
Net Interest Income	8,384	8,980
Provision for credit losses	2,083	1,786
Non-interest income	638	710
Non-interest expense	5,230	5,231
Amortization of intangibles	0	0
Income tax expense (benefit)	474	1,067
Net income (loss)	1,235	1,606
Total assets	169,737	184,006
Total intangibles	1,809	1,809
Parent and Other [Member]
Segment Reporting Information [Line Items]
Interest income	26	(610)
Interest expense	3,552	2,154
Net Interest Income	(3,526)	(2,764)
Provision for credit losses	0	0
Non-interest income	(1,752)	(184)
Non-interest expense	979	88
Amortization of intangibles	0	0
Income tax expense (benefit)	(1,639)	(1,952)
Net income (loss)	(4,618)	(1,084)
Total assets	12,808	(14,016)
Total intangibles	$ 0	$ 0

XML

FAIR VALUE MEASUREMENTS - Assets and Liabilities on Recurring Basis (Detail) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		$ 2,927,463	$ 2,764,562
Loans held for sale	[1]	21,610	56,458
Derivative assets		20,292	30,547
Derivative liabilities		51,892	29,197
U.S. Government-Sponsored Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		358,648	343,942
Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		832,350	794,957
Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		1	1
Commercial Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		39,213
States of the U.S. and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		21,023	21,093
Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		4,655	4,670
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		0	161
Derivative assets		0	0
Derivative liabilities		0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		2,927,463	2,764,401
Derivative assets		18,912	28,953
Derivative liabilities		51,887	29,192
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, securities available for sale		0	0
Derivative assets		1,380	1,594
Derivative liabilities		5	5
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		2,927,463	2,763,537
Assets measured at fair value, equity securities available for sale		1,121	1,025
Assets measured at fair value, securities available for sale			2,764,562
Loans held for sale		21,610	56,458
Derivative assets		20,292	30,547
Assets measured at fair value on a recurring basis, Total		2,970,486	2,851,567
Derivative liabilities		51,892	29,197
Liabilities measured at fair value on a recurring basis, Total		51,892	29,197
Fair Value, Measurements, Recurring [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		47,930	26,953
Fair Value, Measurements, Recurring [Member] | Not for Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		3,962	2,244
Fair Value, Measurements, Recurring [Member] | Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		18,683	28,453
Fair Value, Measurements, Recurring [Member] | Not for Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		1,609	2,094
Fair Value, Measurements, Recurring [Member] | Fixed Income Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, equity securities available for sale		177	161
Fair Value, Measurements, Recurring [Member] | Financial Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, equity securities available for sale		944	864
Fair Value, Measurements, Recurring [Member] | U.S. Government-Sponsored Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		358,648	343,942
Fair Value, Measurements, Recurring [Member] | Agency Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		1,671,573	1,598,874
Fair Value, Measurements, Recurring [Member] | Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		832,350	794,957
Fair Value, Measurements, Recurring [Member] | Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		1	1
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		39,213
Fair Value, Measurements, Recurring [Member] | States of the U.S. and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		21,023	21,093
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		4,655	4,670
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Assets measured at fair value, equity securities available for sale		177	161
Assets measured at fair value, securities available for sale			161
Loans held for sale		0	0
Derivative assets		0	0
Assets measured at fair value on a recurring basis, Total		177	161
Derivative liabilities		0	0
Liabilities measured at fair value on a recurring basis, Total		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Not for Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Not for Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Fixed Income Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, equity securities available for sale		177	161
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Financial Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, equity securities available for sale		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | U.S. Government-Sponsored Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Agency Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Commercial Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | States of the U.S. and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		2,927,463	2,763,537
Assets measured at fair value, equity securities available for sale		944	864
Assets measured at fair value, securities available for sale			2,764,401
Loans held for sale		21,610	56,458
Derivative assets		18,912	28,953
Assets measured at fair value on a recurring basis, Total		2,968,929	2,849,812
Derivative liabilities		51,887	29,192
Liabilities measured at fair value on a recurring basis, Total		51,887	29,192
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		47,930	26,953
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not for Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		3,957	2,239
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		18,683	28,453
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not for Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		229	500
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Fixed Income Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, equity securities available for sale		0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Financial Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, equity securities available for sale		944	864
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. Government-Sponsored Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		358,648	343,942
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Agency Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		1,671,573	1,598,874
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		832,350	794,957
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		1	1
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Commercial Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		39,213
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | States of the U.S. and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		21,023	21,093
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		4,655	4,670
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Assets measured at fair value, equity securities available for sale		0	0
Assets measured at fair value, securities available for sale			0
Loans held for sale		0	0
Derivative assets		1,380	1,594
Assets measured at fair value on a recurring basis, Total		1,380	1,594
Derivative liabilities		5	5
Liabilities measured at fair value on a recurring basis, Total		5	5
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Not for Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		5	5
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Not for Trading Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		1,380	1,594
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Fixed Income Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, equity securities available for sale		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Financial Services Industry [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, equity securities available for sale		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | U.S. Government-Sponsored Entities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Agency Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Commercial Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | States of the U.S. and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value		$ 0	$ 0

[1] Amount represents loans for which we have elected the fair value option. See Note 18.

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FAIR VALUE MEASUREMENTS - Rollforward on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 1,594	$ 1,386
Total gains (losses) – realized/unrealized:
Included in earnings		4
Included in other comprehensive income		80
Accretion included in earnings		0
Purchases, issuances, sales and settlements:
Purchases	1,380	13,642
Sales/redemptions		(12,921)
Settlements	(1,594)	(4,588)
Transfers from Level 3		(578)
Transfers into Level 3		4,569
Balance at end of period	1,380	1,594
Other Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0	0
Total gains (losses) – realized/unrealized:
Included in earnings		0
Included in other comprehensive income		0
Accretion included in earnings		(1)
Purchases, issuances, sales and settlements:
Purchases	0	12,048
Sales/redemptions		(12,047)
Settlements	0	0
Transfers from Level 3		0
Transfers into Level 3		0
Balance at end of period	0	0
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0	492
Total gains (losses) – realized/unrealized:
Included in earnings		0
Included in other comprehensive income		86
Accretion included in earnings		0
Purchases, issuances, sales and settlements:
Purchases	0	0
Sales/redemptions		0
Settlements	0	0
Transfers from Level 3		(578)
Transfers into Level 3		0
Balance at end of period	0	0
Residential Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0	894
Total gains (losses) – realized/unrealized:
Included in earnings		4
Included in other comprehensive income		(6)
Accretion included in earnings		1
Purchases, issuances, sales and settlements:
Purchases	0	0
Sales/redemptions		(874)
Settlements	0	(19)
Transfers from Level 3		0
Transfers into Level 3		0
Balance at end of period	0	0
Interest Rate Lock Commitments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	1,594	0
Total gains (losses) – realized/unrealized:
Included in earnings		0
Included in other comprehensive income		0
Accretion included in earnings		0
Purchases, issuances, sales and settlements:
Purchases	1,380	1,594
Sales/redemptions		0
Settlements	(1,594)	(4,569)
Transfers from Level 3		0
Transfers into Level 3		4,569
Balance at end of period	$ 1,380	$ 1,594

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FAIR VALUE MEASUREMENTS - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value Measurements Disclosure [Line Items]
Retained earnings	$ 413,340,000		$ 367,658,000
Allocated allowance for loan losses	3,200,000
Provision for fair value measurements included in allowance for loan losses	2,700,000
Carrying amount of OREO	2,000,000
Written down of OREO	1,600,000
Loss from OREO included in earnings	$ 400,000
Short-term borrowings approximate fair value for amounts that mature, days, less than	90 days
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Measurements Disclosure [Line Items]
Impaired loans, carrying amount	$ 3,500,000
Allocated allowance for loan losses	3,507,000		$ 4,110,000
Assets Still Held [Member]
Fair Value Measurements Disclosure [Line Items]
Included in earnings		$ 0
Other Debt Securities [Member] | Yadkin Financial Corporation (YDKN) [Member]
Fair Value Measurements Disclosure [Line Items]
Business acquisition		12,000,000
Equity Securities [Member]
Fair Value Measurements Disclosure [Line Items]
Transfer of equity security to non-marketable equity securities, included in other assets	0
Fair value, net derivative asset (liability) measured on recurring basis, unobservable inputs reconciliation, transfers, net		$ 600,000
Accounting Standards Update 2016-01 [Member]
Fair Value Measurements Disclosure [Line Items]
Retained earnings	$ 500,000

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FAIR VALUE MEASUREMENTS - Additional Information on Non-Recurring Basis (Detail) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		$ 3,200
Loans held for sale	[1]	21,610	$ 56,458
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan servicing rights, fair value		0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan servicing rights, fair value		0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan servicing rights, fair value		41,878	37,758
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		3,507	4,110
Other real estate owned		1,621	21,336
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0	0
Other real estate owned		0	0
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		2,032	2,813
Other real estate owned		0	10,513
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		1,475	1,297
Other real estate owned		1,621	10,823
SBA-Guaranteed Loan Servicing [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan servicing rights, fair value		5,062	5,058	$ 5,339	$ 0
SBA-Guaranteed Loan Servicing [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale			36,432
Loan servicing rights, fair value		5,062	5,058
SBA-Guaranteed Loan Servicing [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale			0
Loan servicing rights, fair value		0	0
SBA-Guaranteed Loan Servicing [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale			0
Loan servicing rights, fair value		0	0
SBA-Guaranteed Loan Servicing [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale			36,432
Loan servicing rights, fair value		$ 5,062	$ 5,058

[1] Amount represents loans for which we have elected the fair value option. See Note 18.

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FAIR VALUE MEASUREMENTS - Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 386,329	$ 479,443	$ 450,383	$ 371,407
Securities available for sale	2,927,463	2,764,562
Securities held to maturity	3,224,000	3,242,268
Securities held to maturity, fair value	3,131,964	3,218,379
Derivative assets	20,292	30,547
Deposits	22,497,089	22,399,725
Short-term borrowings	3,802,480	3,678,337
Long-term borrowings	659,890	668,173
Derivative liabilities	51,892	29,197
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	386,329	479,443
Securities available for sale	2,927,463	2,764,562
Securities held to maturity	3,224,000	3,242,268
Net loans and leases	21,121,132	20,916,277
Loan servicing rights	35,853	34,111
Marketable securities, equity securities	1,121
Derivative assets	20,292	30,547
Accrued interest receivable	95,082	94,254
Deposits	22,497,089	22,399,725
Short-term borrowings	3,802,480	3,678,337
Long-term borrowings	659,890	668,173
Derivative liabilities	51,892	29,197
Accrued interest payable	12,762	12,480
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, fair value	386,329	479,443
Securities available for sale	2,927,463	2,764,562
Securities held to maturity, fair value	3,131,964	3,218,379
Net loans and leases, fair value	20,900,639	20,661,196
Loan servicing rights, fair value	41,878	37,758
Marketable securities, equity securities, fair value	1,121
Derivative assets	20,292	30,547
Accrued interest receivable	95,082	94,254
Deposits, fair value	22,441,017	22,359,182
Short-term borrowings, fair value	3,802,988	3,678,723
Long-term borrowings, fair value	663,085	675,489
Derivative liabilities	51,892	29,197
Accrued interest payable	12,762	12,480
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, fair value	386,329	479,443
Securities available for sale	0	161
Securities held to maturity, fair value	0	0
Net loans and leases, fair value	0	0
Loan servicing rights, fair value	0	0
Marketable securities, equity securities, fair value	177
Derivative assets	0	0
Accrued interest receivable	95,082	94,254
Deposits, fair value	17,755,830	17,779,246
Short-term borrowings, fair value	3,802,988	3,678,723
Long-term borrowings, fair value	0	0
Derivative liabilities	0	0
Accrued interest payable	12,762	12,480
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, fair value	0	0
Securities available for sale	2,927,463	2,764,401
Securities held to maturity, fair value	3,131,964	3,218,379
Net loans and leases, fair value	21,610	56,458
Loan servicing rights, fair value	0	0
Marketable securities, equity securities, fair value	944
Derivative assets	18,912	28,953
Accrued interest receivable	0	0
Deposits, fair value	4,685,187	4,579,936
Short-term borrowings, fair value	0	0
Long-term borrowings, fair value	0	0
Derivative liabilities	51,887	29,192
Accrued interest payable	0	0
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, fair value	0	0
Securities available for sale	0	0
Securities held to maturity, fair value	0	0
Net loans and leases, fair value	20,879,029	20,604,738
Loan servicing rights, fair value	41,878	37,758
Marketable securities, equity securities, fair value	0
Derivative assets	1,380	1,594
Accrued interest receivable	0	0
Deposits, fair value	0	0
Short-term borrowings, fair value	0	0
Long-term borrowings, fair value	663,085	675,489
Derivative liabilities	5	5
Accrued interest payable	$ 0	$ 0