10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2015

¨ 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 000-08467

WESBANCO, INC.

(Exact name of Registrant as specified in its charter)

WEST VIRGINIA	55-0571723
(State of incorporation)	(IRS Employer Identification No.)
1 Bank Plaza, Wheeling, WV	26003
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: 304-234-9000

NOT APPLICABLE

(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  þ    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (section 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  þ    No  ¨

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

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

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

As of October 23, 2015, there were 38,512,012 shares of WesBanco, Inc. common stock, $2.0833 par value, outstanding.

WESBANCO, INC.

TABLE OF CONTENTS

Item No.	ITEM	Page No.
	PART I - FINANCIAL INFORMATION
1	Financial Statements
	Consolidated Balance Sheets at September 30, 2015 (unaudited) and December 31, 2014		3
	Consolidated Statements of Comprehensive Income for the three and nine months ended September  30, 2015 and 2014 (unaudited)		4
	Consolidated Statements of Changes in Shareholders’ Equity for the nine months ended September  30, 2015 and 2014 (unaudited)		5
	Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 and 2014 (unaudited)		6
	Notes to Consolidated Financial Statements (unaudited)		7
2	Management’s Discussion and Analysis of Financial Condition and Results of Operations		29
3	Quantitative and Qualitative Disclosures About Market Risk		49
4	Controls and Procedures		51
	PART II - OTHER INFORMATION
1	Legal Proceedings		52
2	Unregistered Sales of Equity Securities and Use of Proceeds		52
6	Exhibits		54
	Signatures		55

2

PART I - FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

WESBANCO, INC. CONSOLIDATED BALANCE SHEETS

(unaudited, in thousands, except shares)	September 30, 2015			December 31, 2014
ASSETS
Cash and due from banks, including interest bearing amounts of $2,144 and $8,405, respectively	$	92,975		$	94,002
Securities:
Available-for-sale, at fair value		1,559,718			917,424
Held-to-maturity (fair values of $983,997 and $619,617, respectively)		957,352			593,670
Total securities		2,517,070			1,511,094
Loans held for sale		10,765			5,865
Portfolio loans, net of unearned income		4,950,642			4,086,766
Allowance for loan losses		(41,624	)		(44,654	)
Net portfolio loans		4,909,018			4,042,112
Premises and equipment, net		111,699			93,135
Accrued interest receivable		27,000			18,481
Goodwill and other intangible assets, net		492,725			319,506
Bank-owned life insurance		155,894			123,298
Other assets		135,284			89,072
Total Assets	$	8,452,430		$	6,296,565
LIABILITIES
Deposits:
Non-interest bearing demand	$	1,280,329		$	1,061,075
Interest bearing demand		1,206,837			885,037
Money market		1,011,420			954,957
Savings deposits		1,064,426			842,818
Certificates of deposit		1,630,890			1,305,096
Total deposits		6,193,902			5,048,983
Federal Home Loan Bank borrowings		893,117			223,126
Other short-term borrowings		84,587			80,690
Junior subordinated debt owed to unconsolidated subsidiary trusts		106,196			106,176
Total borrowings		1,083,900			409,992
Accrued interest payable		2,832			1,620
Other liabilities		56,054			47,780
Total Liabilities		7,336,688			5,508,375
SHAREHOLDERS’ EQUITY
Preferred stock, no par value; 1,000,000 shares authorized; none outstanding		—			—
Common stock, $2.0833 par value; 100,000,000 and 50,000,000 shares authorized in 2015 and 2014, respectively; 38,546,042 and 29,367,511 issued in 2015 and 2014, respectively; outstanding: 38,517,542 and 29,298,188 shares in 2015 and 2014, respectively		80,304			61,182
Capital surplus		515,783			244,661
Retained earnings		535,777			504,578
Treasury stock (28,550 and 69,323 shares in 2015 and 2014, respectively, at cost)		(890	)		(2,151	)
Accumulated other comprehensive loss		(14,446	)		(18,825	)
Deferred benefits for directors		(786	)		(1,255	)
Total Shareholders’ Equity		1,115,742			788,190
Total Liabilities and Shareholders’ Equity	$	8,452,430		$	6,296,565

See Notes to Consolidated Financial Statements.

3

WESBANCO, INC. CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(unaudited, in thousands, except shares and per share amounts)	2015			2014			2015		2014
INTEREST AND DIVIDEND INCOME
Loans, including fees	$	51,876		$	43,399		$	151,913	$	128,691
Interest and dividends on securities:
Taxable		10,251			7,375			28,792		22,051
Tax-exempt		4,535			3,413			12,120		10,234
Total interest and dividends on securities		14,786			10,788			40,912		32,285
Other interest income		273			116			1,227		829
Total interest and dividend income		66,935			54,303			194,052		161,805
INTEREST EXPENSE
Interest bearing demand deposits		517			399			1,425		1,168
Money market deposits		485			487			1,430		1,394
Savings deposits		165			135			475		398
Certificates of deposit		2,662			3,254			8,403		10,305
Total interest expense on deposits		3,829			4,275			11,733		13,265
Federal Home Loan Bank borrowings		1,650			264			3,157		650
Other short-term borrowings		89			348			254		1,255
Junior subordinated debt owed to unconsolidated subsidiary trusts		758			805			2,541		2,392
Total interest expense		6,326			5,692			17,685		17,562
NET INTEREST INCOME		60,609			48,611			176,367		144,243
Provision for credit losses		1,798			1,478			5,768		4,526
Net interest income after provision for credit losses		58,811			47,133			170,599		139,717
NON-INTEREST INCOME
Trust fees		5,127			5,096			16,656		15,954
Service charges on deposits		4,425			4,170			12,342		12,107
Electronic banking fees		3,849			3,268			10,670		9,549
Net securities brokerage revenue		1,996			1,701			5,897		5,533
Bank-owned life insurance		1,021			882			3,264		3,577
Net gains on sales of mortgage loans		779			550			1,459		1,178
Net securities gains		47			581			69		756
Net (loss) / gain on other real estate owned and other assets		(18	)		(1,167	)		167		(1,218	)
Other income		960			1,573			3,916		4,508
Total non-interest income		18,186			16,654			54,440		51,944
NON-INTEREST EXPENSE
Salaries and wages		19,832			17,331			57,468		50,700
Employee benefits		6,028			5,051			20,151		16,289
Net occupancy		3,533			2,916			10,298		9,265
Equipment		3,731			2,837			9,689		8,534
Marketing		1,514			1,276			4,221		3,992
FDIC insurance		1,064			786			3,014		2,543
Amortization of intangible assets		815			477			2,325		1,454
Restructuring and merger-related expense		185			—			11,033		—
Other operating expenses		10,279			8,589			28,830		26,884
Total non-interest expense		46,981			39,263			147,029		119,661
Income before provision for income taxes		30,016			24,524			78,010		72,000
Provision for income taxes		7,768			6,358			20,250		18,538
NET INCOME	$	22,248		$	18,166		$	57,760	$	53,462
EARNINGS PER COMMON SHARE
Basic	$	0.58		$	0.62		$	1.55	$	1.83
Diluted	$	0.58		$	0.62		$	1.55	$	1.82
AVERAGE COMMON SHARES OUTSTANDING
Basic		38,523,593			29,280,648			37,144,783		29,235,364
Diluted		38,556,995			29,360,880			37,204,114		29,316,914
DIVIDENDS DECLARED PER COMMON SHARE	$	0.23		$	0.22		$	0.69	$	0.66
COMPREHENSIVE INCOME	$	29,504		$	16,136		$	62,139	$	58,773

See Notes to Consolidated Financial Statements.

4

WESBANCO, INC. CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY

For the Nine Months Ended September 30, 2015 and 2014

	Common Stock														Accumulated Other			Deferred
(unaudited, in thousands, except shares and per share amounts)	Shares Outstanding			Amount		Capital Surplus			Retained Earnings			Treasury Stock			Comprehensive Income (Loss)			Benefits for Directors			Total
December 31, 2014		29,298,188		$	61,182	$	244,661		$	504,578		$	(2,151	)	$	(18,825	)	$	(1,255	)	$	788,190
Net income		—			—		—			57,760			—			—			—			57,760
Other comprehensive income		—			—		—			—			—			4,379			—			4,379
Comprehensive income		—			—		—			—			—			—			—			62,139
Common dividends declared ($0.69 per share)		—			—		—			(26,561	)		—			—			—			(26,561	)
Shares issued for acquisition		9,178,531			19,122		274,507			—			—			—			—			293,629
Treasury shares acquired		(64,102	)		—		—			—			(2,065	)		—			—			(2,065	)
Stock options exercised		55,375			—		(295	)		—			1,768			—			—			1,473
Restricted stock granted		49,550			—		(1,558	)		—			1,558			—			—			—
Repurchase of stock warrant		—			—		(2,247	)		—			—			—			—			(2,247	)
Stock compensation expense		—			—		1,184			—			—			—			—			1,184
Deferred benefits for directors- net		—			—		(469	)		—			—			—			469			—
September 30, 2015		38,517,542		$	80,304	$	515,783		$	535,777		$	(890	)	$	(14,446	)	$	(786	)	$	1,115,742
December 31, 2013		29,175,236		$	61,182	$	244,974		$	460,351		$	(5,969	)	$	(12,734	)	$	(1,209	)	$	746,595
Net income		—			—		—			53,462			—			—			—			53,462
Other comprehensive income		—			—		—			—			—			5,311			—			5,311
Comprehensive income		—			—		—			—			—			—			—			58,773
Common dividends declared ($0.66 per share)		—			—		—			(19,302	)		—			—			—			(19,302	)
Treasury shares acquired		(2,258	)		—		49			—			(69	)		—			—			(20	)
Stock options exercised		68,143			—		(342	)		—			2,116			—			—			1,774
Restricted stock granted		42,554			—		(1,321	)		—			1,321			—			—			—
Stock compensation expense		—			—		964			—			—			—			—			964
Deferred benefits for directors- net		—			—		34			—			—			—			(34	)		—
September 30, 2014		29,283,675		$	61,182	$	244,358		$	494,511		$	(2,601	)	$	(7,423	)	$	(1,243	)	$	788,784

See Notes to Consolidated Financial Statements.

5

WESBANCO, INC. CONSOLIDATED STATEMENTS OF CASH FLOWS

	For the Nine Months Ended September 30,
(unaudited, in thousands)	2015			2014
NET CASH PROVIDED BY OPERATING ACTIVITIES	$	58,591		$	70,215
INVESTING ACTIVITIES
Net increase in loans		(176,375	)		(142,693	)
Securities available-for-sale:
Proceeds from sales		570,739			4,819
Proceeds from maturities, prepayments and calls		233,756			169,094
Purchases of securities		(509,216	)		(192,340	)
Securities held-to-maturity:
Proceeds from maturities, prepayments and calls		39,492			34,572
Purchases of securities		(297,692	)		(33,153	)
Proceeds from bank-owned life insurance		1,281			2,284
Cash paid to acquire a business, net of cash acquired		(28,551	)		—
Purchases of premises and equipment – net		(6,936	)		(4,409	)
Net cash used in investing activities		(173,502	)		(161,826	)
FINANCING ACTIVITIES
(Decrease) increase in deposits		(99,569	)		39,688
Proceeds from Federal Home Loan Bank borrowings		791,910			100,532
Repayment of Federal Home Loan Bank borrowings		(514,081	)		(16,559	)
Decrease in other short-term borrowings		(1,103	)		(64,074	)
Increase in federal funds purchased		—			30,000
Repayment of junior subordinated debt		(36,083	)		—
Repurchase of common stock warrant		(2,247	)		—
Dividends paid to common shareholders		(24,148	)		(18,695	)
Treasury shares (purchased) sold - net		(795	)		1,587
Net cash provided by financing activities		113,884			72,479
Net decrease in cash and cash equivalents		(1,027	)		(19,132	)
Cash and cash equivalents at beginning of the period		94,002			95,551
Cash and cash equivalents at end of the period	$	92,975		$	76,419
SUPPLEMENTAL DISCLOSURES
Interest paid on deposits and other borrowings	$	19,166		$	18,672
Income taxes paid		9,695			12,300
Transfers of loans to other real estate owned		1,029			1,832
Non-cash transactions related to ESB acquisition		(301,933	)		—

See Notes to Consolidated Financial Statements.

6

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of presentation — The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2014.

WesBanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2014 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly WesBanco’s financial position and results of operations for each of the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.

Recent accounting pronouncements — In September 2015, the Financial Accounting Standards Board (the “FASB”) issued an Accounting Standards Update (“ASU”) (ASU 2015-16) that eliminates the requirement that an acquirer in a business combination account for measurement-period adjustments retrospectively. Instead, acquirers must recognize measurement-period adjustments during the period in which they determine the amounts, including the effect on earnings of any amounts they would have recorded in previous periods if the accounting had been completed at the acquisition date. The acquirer still must disclose the amounts and reasons for adjustments to the provisional amounts. The acquirer also must disclose, by line item, the amount of the adjustment reflected in the current-period income statement that would have been recognized in previous periods if the adjustment to provisional amounts had been recognized as of the acquisition date. Alternatively, an acquirer may present those amounts separately on the face of the income statement. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2015, including interim periods with those fiscal years. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

In May 2015, the FASB issued ASU 2015-07 related to disclosures for investments in certain entities that calculate net asset value (NAV) per share (or its equivalent). This update removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient and modifies certain disclosure requirements. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2015, and requires retrospective adoption. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

In April 2015, the FASB issued ASU 2015-05 that provides guidance on when to account for a cloud computing arrangement as a software license. The guidance applies only to internal-use software that a customer obtains access to in a hosting arrangement if both of the following criteria are met: (1) The customer has the contractual right to take possession of the software at any time during the hosting period without significant penalty, (2) it is feasible for the customer to either run the software on its own hardware or contract with another party unrelated to the vendor to host the software. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

In February 2015, the FASB issued ASU 2015-02 that revised the consolidation model, requiring reporting entities to reevaluate whether they should consolidate certain legal entities under the revised model. The amendments in this update modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities, and eliminate the presumption that a general partner should consolidate and affect the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The pronouncement also provides for a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements similar to those in Rule 2a-7 of the Investment Company Act of 1940 for registered money market funds. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

        In August 2014, the FASB issued ASU 2014-14 related to the classification of certain government-guaranteed mortgage loans upon foreclosure. The amendments in this update require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the following conditions are met: (1) The loan has a government guarantee that is not separable from the loan before foreclosure, (2) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim, (3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based upon the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The pronouncement is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014 and may be adopted under either a modified retrospective transition method or a prospective transition method. However, the same method of transition as elected under ASU 2014-04 must be applied. While early adoption was permitted, WesBanco elected to adopt the ASU in the first quarter of 2015, which was the first interim period after December 31, 2014. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In June 2014, the FASB issued ASU 2014-11 related to repurchase-to-maturity transactions, repurchase financing and disclosures. The pronouncement changes the accounting for repurchase-to-maturity transactions and linked repurchase financings to secured borrowing accounting, which is consistent with the accounting for other repurchase agreements. The pronouncement also requires two new disclosures. The first disclosure requires an entity to disclose information on transfers accounted for as sales in transactions that are economically similar to repurchase agreements. The second disclosure provides increased transparency about the types of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The pronouncement is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. WesBanco adopted the ASU in the first quarter of 2015. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

7

In May 2014, the FASB issued ASU 2014-09 related to the recognition of revenue from contracts with customers. The new revenue pronouncement creates a single source of revenue guidance for all companies in all industries and is more principles-based than current revenue guidance. The pronouncement provides a five-step model for a company to recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The five steps are, (1) identify the contract with the customer, (2) identify the separate performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the separate performance obligations and (5) recognize revenue when each performance obligation is satisfied. The pronouncement was originally effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2016 using either a full retrospective approach for all periods presented in the period of adoption or a modified retrospective approach. Early adoption is not permitted. On July 9, 2015, the FASB approved a one-year deferral of the effective date of the update. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is now permitted as of the original effective date for interim and annual reporting periods in fiscal years beginning after December 15, 2016. WesBanco is currently evaluating the impact of the adoption of this pronouncement on its Consolidated Financial Statements.

NOTE 2. MERGERS AND ACQUISITIONS

On February 10, 2015, WesBanco completed its acquisition of ESB Financial Corporation (“ESB”), and its wholly-owned banking subsidiary, ESB Bank (“ESB Bank”), a Pennsylvania-chartered stock savings bank headquartered in Ellwood City, Pennsylvania. The transaction expanded WesBanco’s franchise in the Pittsburgh region of western Pennsylvania from 16 to 38 offices.

On the acquisition date, ESB had $1.9 billion in assets, excluding goodwill, which included $701.0 million in loans, and $486.9 million in securities. The ESB acquisition was valued at $339.0 million, based on WesBanco’s closing stock price on February 10, 2015 of $32.00, and resulted in WesBanco issuing 9,178,531 shares of its common stock and $45.0 million in cash and other assets in exchange for ESB common stock. The assets and liabilities of ESB were recorded on WesBanco’s balance sheet at their preliminary estimated fair values as of February 10, 2015, the acquisition date, and ESB’s results of operations have been included in WesBanco’s Consolidated Statements of Income since that date. ESB was merged into WesBanco and ESB Bank was merged into WesBanco Bank, Inc. (the “Bank”) on February 10, 2015. Based on a preliminary purchase price allocation, WesBanco recorded $169.7 million in goodwill and $5.3 million in core deposit intangibles in its community banking segment, representing the principal change in goodwill and intangibles from December 31, 2014. None of the goodwill is deductible for income tax purposes as the acquisition is accounted for as a tax-free exchange for tax purposes. As a result of the full integration of the operations of ESB, it is not practicable to determine the proforma results or revenue and net income included in WesBanco’s operating results relating to ESB since the date of acquisition because ESB has been fully integrated into WesBanco’s operations, and the operating results of ESB can therefore not be separately identified.

For the nine months ended September 30, 2015, WesBanco recorded merger-related expenses of $11.0 million associated with the ESB acquisition. In 2014 WesBanco recognized $1.3 million in merger-related expenses in connection with the ESB acquisition.

The purchase price of the ESB acquisition and resulting goodwill is summarized as follows:

(unaudited, in thousands)	February 10, 2015
Purchase Price:
Fair value of WesBanco shares issued, (net of equity issuance costs of $0.1 million)	$	293,933
Cash consideration for outstanding ESB shares, options and restricted stock		37,036
Settlement of pre-existing loan to ESB		8,000
Total purchase price	$	338,969
Fair value of:
Tangible assets acquired	$	1,858,014
Core deposit and other intangible assets acquired		5,346
Liabilities assumed		(1,702,554	)
Net cash received in the acquisition		8,485
Fair value of net assets acquired		169,291
Goodwill recognized	$	169,678

8

The following table presents the preliminary allocation of the purchase price of the assets acquired and the liabilities assumed at the date of acquisition, as WesBanco intends to finalize its accounting for the acquisition of ESB during 2015:

(unaudited, in thousands)	February 10, 2015
Assets
Cash and due from banks	$	8,485
Securities		486,891
Loans		700,964
Goodwill and other intangible assets		175,023
Accrued income and other assets (1)		670,160
Total Assets	$	2,041,523
Liabilities
Deposits	$	1,246,992
Borrowings		433,454
Accrued expenses and other liabilities		22,108
Total liabilities		1,702,554
Purchase price	$	338,969

⁽¹⁾ Includes receivables of $560.7 million from the sale of available-for-sale securities prior to the acquisition date.

NOTE 3. EARNINGS PER COMMON SHARE

Earnings per common share are calculated as follows:

	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
(unaudited, in thousands, except shares and per share amounts)	2015		2014		2015		2014
Numerator for both basic and diluted earnings per common share:
Net income	$	22,248	$	18,166	$	57,760	$	53,462
Denominator:
Total average basic common shares outstanding		38,523,593		29,280,648		37,144,783		29,235,364
Effect of dilutive stock options and warrant		33,402		80,232		59,331		81,550
Total diluted average common shares outstanding		38,556,995		29,360,880		37,204,114		29,316,914
Earnings per common share - basic	$	0.58	$	0.62	$	1.55	$	1.83
Earnings per common share - diluted	$	0.58	$	0.62	$	1.55	$	1.82

All stock options outstanding were included in the computation of diluted earnings per share for the three and nine months ended September 30, 2015 and 2014, respectively, as all were considered dilutive.

On February 10, 2015, WesBanco issued 9,178,531 shares to complete its acquisition of ESB. These shares are included in average shares outstanding beginning on that date. For additional information relating to the ESB acquisition, refer to Note 2, “Mergers and Acquisitions.”

9

NOTE 4. SECURITIES

The following table presents the fair value and amortized cost of available-for-sale and held-to-maturity securities:

	September 30, 2015									December 31, 2014
(unaudited, in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-sale
Obligations of government agencies	$	79,390	$	1,433	$	(14	)	$	80,809	$	86,964	$	1,087	$	(315	)	$	87,736
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,248,057		6,767		(4,376	)		1,250,448		703,535		4,336		(6,758	)		701,113
Obligations of states and political subdivisions		85,523		4,830		(44	)		90,309		86,073		5,365		(5	)		91,433
Corporate debt securities		127,201		318		(170	)		127,349		25,974		141		(119	)		25,996
Total debt securities	$	1,540,171	$	13,348	$	(4,604	)	$	1,548,915	$	902,546	$	10,929	$	(7,197	)	$	906,278
Equity securities		10,106		697		—			10,803		10,304		842		—			11,146
Total available-for-sale securities	$	1,550,277	$	14,045	$	(4,604	)	$	1,559,718	$	912,850	$	11,771	$	(7,197	)	$	917,424
Held-to-maturity
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies	$	161,495	$	2,848	$	(358	)	$	163,985	$	79,004	$	3,262	$	(246	)	$	82,020
Obligations of states and political subdivisions		766,423		25,359		(1,336	)		790,446		507,927		23,917		(1,043	)		530,801
Corporate debt securities		29,434		183		(51	)		29,566		6,739		106		(49	)		6,796
Total held-to-maturity securities	$	957,352	$	28,390	$	(1,745	)	$	983,997	$	593,670	$	27,285	$	(1,338	)	$	619,617
Total securities	$	2,507,629	$	42,435	$	(6,349	)	$	2,543,715	$	1,506,520	$	39,056	$	(8,535	)	$	1,537,041

At September 30, 2015, and December 31, 2014, there were no holdings of any one issuer, other than the U.S. government and its agencies, in an amount greater than 10% of WesBanco’s shareholders’ equity.

The following table presents the fair value of available-for-sale and held-to-maturity securities by contractual maturity at September 30, 2015. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date.

	September 30, 2015
(unaudited, in thousands)	One Year or less		One to Five Years		Five to Ten Years		After Ten Years		Mortgage-backed and Equity		Total
Available-for-sale
Obligations of government agencies	$	—	$	20,000	$	39,115	$	21,694	$	—	$	80,809
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies (1)		—		—		—		—		1,250,448		1,250,448
Obligations of states and political subdivisions		7,286		26,827		33,021		23,175		—		90,309
Corporate debt securities		49,777		61,384		14,251		1,937		—		127,349
Equity securities (2)		—		—		—		—		10,803		10,803
Total available-for-sale securities	$	57,063	$	108,211	$	86,387	$	46,806	$	1,261,251	$	1,559,718
Held-to-maturity (3)
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies (1)	$	—	$	—	$	—	$	—	$	163,985	$	163,985
Obligations of states and political subdivisions		1,863		34,159		342,764		411,660		—		790,446
Corporate debt securities		—		1,010		24,616		3,940		—		29,566
Total held-to-maturity securities	$	1,863	$	35,169	$	367,380	$	415,600	$	163,985	$	983,997
Total securities	$	58,926	$	143,380	$	453,767	$	462,406	$	1,425,236	$	2,543,715

⁽¹⁾  Mortgage-backed and collateralized mortgage securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds.

⁽²⁾ Equity securities, which have no stated maturity, are not assigned a maturity category.

⁽³⁾ The held-to-maturity portfolio is carried at an amortized cost of $957.4 million.

10

Securities with aggregate fair values of $1.1 billion and $706.5 million at September 30, 2015 and December 31, 2014, respectively, were pledged as security for public and trust funds, and securities sold under agreements to repurchase. Proceeds from the sale of available-for-sale securities were $570.7 million, primarily due to the ESB portfolio restructuring, and $4.8 million for the nine months ended September 30, 2015 and 2014, respectively. Net unrealized gains on available-for-sale securities included in accumulated other comprehensive income net of tax, as of September 30, 2015 and December 31, 2014 were $6.0 million and $2.9 million, respectively.

The following table presents the gross realized gains and losses on sales and calls of securities for the three and nine months ended September 30, 2015 and 2014, respectively.

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
(unaudited, in thousands)	2015			2014			2015			2014
Gross realized gains	$	48		$	602		$	74		$	967
Gross realized losses		(1	)		(21	)		(5	)		(211	)
Net realized gains (losses)	$	47		$	581		$	69		$	756

The following tables provide information on unrealized losses on investment securities that have been in an unrealized loss position for less than twelve months and twelve months or more as of September 30, 2015 and December 31, 2014:

	September 30, 2015
	Less than 12 months							12 months or more							Total
(unaudited, dollars in thousands)	Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities
Obligations of government agencies	$	12,986	$	(14	)		2	$	—	$	—			—	$	12,986	$	(14	)		2
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		430,580		(1,753	)		73		145,652		(2,981	)		31		576,232		(4,734	)		104
Obligations of states and political subdivisions		120,249		(941	)		166		20,601		(439	)		30		140,850		(1,380	)		196
Corporate debt securities		71,958		(172	)		22		1,937		(49	)		1		73,895		(221	)		23
Total temporarily impaired securities	$	635,773	$	(2,880	)		263	$	168,190	$	(3,469	)		62	$	803,963	$	(6,349	)		325
	December 31, 2014
	Less than 12 months							12 months or more							Total
(unaudited, dollars in thousands)	Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities
Obligations of government agencies	$	19,362	$	(77	)		5	$	19,757	$	(238	)		4	$	39,119	$	(315	)		9
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		78,786		(386	)		19		240,055		(6,618	)		43		318,841		(7,004	)		62
Obligations of states and political subdivisions		12,615		(96	)		15		61,548		(952	)		93		74,163		(1,048	)		108
Corporate debt securities		2,969		(31	)		1		4,573		(137	)		2		7,542		(168	)		3
Total temporarily impaired securities	$	113,732	$	(590	)		40	$	325,933	$	(7,945	)		142	$	439,665	$	(8,535	)		182

Unrealized losses on debt securities in the tables represent temporary fluctuations resulting from changes in market rates in relation to fixed yields. Unrealized losses in the available-for-sale portfolio are accounted for as an adjustment, net of taxes, to other comprehensive income in shareholders’ equity.

WesBanco does not believe the securities presented above are impaired due to reasons of credit quality, as there are no debt securities rated below investment grade and all are paying principal and interest according to their contractual terms. WesBanco does not intend to sell, nor is it more likely than not that it will be required to sell, loss position securities prior to recovery of their cost, and therefore, management believes the unrealized losses detailed above are temporary and no impairment loss relating to these securities has been recognized.

Securities that do not have readily determinable fair values and for which WesBanco does not exercise significant influence are carried at cost. Cost method investments consist primarily of FHLB of Pittsburgh and FHLB of Cincinnati stock totaling $39.5 million and $11.6 million at September 30, 2015 and December 31, 2014, respectively, and are included in other assets in the Consolidated Balance Sheets. Cost method investments are evaluated for impairment whenever events or circumstances suggest that their carrying value may not be recoverable.

11

NOTE 5. LOANS AND THE ALLOWANCE FOR CREDIT LOSSES

The recorded investment in loans is presented in the Consolidated Balance Sheets net of deferred loan fees and costs of $1.4 million and $2.4 million at September 30, 2015 and December 31, 2014, respectively.

(unaudited, in thousands)	September 30, 2015		December 31, 2014
Commercial real estate:
Land and construction	$	326,754	$	262,643
Improved property		1,856,584		1,682,817
Total commercial real estate		2,183,338		1,945,460
Commercial and industrial		725,730		638,410
Residential real estate		1,243,630		928,770
Home equity		403,387		330,031
Consumer		394,557		244,095
Total portfolio loans		4,950,642		4,086,766
Loans held for sale		10,765		5,865
Total loans	$	4,961,407	$	4,092,631

The following tables summarize changes in the allowance for credit losses applicable to each category of the loan portfolio:

	Allowance for Credit Losses By Category For the Nine Months Ended September 30, 2015 and 2014
(unaudited, in thousands)	Commercial Real Estate- Land and Construction			Commercial Real Estate- Improved Property			Commercial & Industrial			Residential Real Estate			Home Equity			Consumer			Deposit Overdraft			Total
Balance at December 31, 2014:
Allowance for loan losses	$	5,654		$	17,573		$	9,063		$	5,382		$	2,329		$	4,078		$	575		$	44,654
Allowance for loan commitments		194			10			112			9			90			40			—			455
Total beginning allowance for credit losses		5,848			17,583			9,175			5,391			2,419			4,118			575			45,109
Provision for credit losses:
Provision for loan losses		(826	)		977			2,434			325			1,320			922			441			5,593
Provision for loan commitments		9			11			137			—			19			(1	)		—			175
Total provision for credit losses		(817	)		988			2,571			325			1,339			921			441			5,768
Charge-offs		—			(3,964	)		(2,267	)		(1,482	)		(1,124	)		(1,968	)		(610	)		(11,415	)
Recoveries		1			661			356			472			161			968			173			2,792
Net charge-offs		1			(3,303	)		(1,911	)		(1,010	)		(963	)		(1,000	)		(437	)		(8,623	)
Balance at September 30, 2015:
Allowance for loan losses		4,829			15,247			9,586			4,697			2,686			4,000			579			41,624
Allowance for loan commitments		203			21			249			9			109			39			—			630
Total ending allowance for credit losses	$	5,032		$	15,268		$	9,835		$	4,706		$	2,795		$	4,039		$	579		$	42,254
Balance at December 31, 2013:
Allowance for loan losses	$	6,056		$	18,157		$	9,925		$	5,673		$	2,017		$	5,020		$	520		$	47,368
Allowance for loan commitments		301			62			130			5			85			19			—			602
Total beginning allowance for credit losses		6,357			18,219			10,055			5,678			2,102			5,039			520			47,970
Provision for credit losses:
Provision for loan losses		(812	)		(403	)		1,357			1,867			860			1,066			660			4,595
Provision for loan commitments		(35	)		(42	)		(6	)		1			12			1			—			(69	)
Total provision for credit losses		(847	)		(445	)		1,351			1,868			872			1,067			660			4,526
Charge-offs		—			(1,696	)		(2,632	)		(2,025	)		(591	)		(2,326	)		(577	)		(9,847	)
Recoveries		—			457			1,058			339			94			782			183			2,913
Net charge-offs		—			(1,239	)		(1,574	)		(1,686	)		(497	)		(1,544	)		(394	)		(6,934	)
Balance at September 30, 2014:
Allowance for loan losses		5,244			16,515			9,708			5,854			2,380			4,542			786			45,029
Allowance for loan commitments		266			20			124			6			97			20			—			533
Total ending allowance for credit losses	$	5,510		$	16,535		$	9,832		$	5,860		$	2,477		$	4,562		$	786		$	45,562

12

The following tables present the allowance for credit losses and recorded investments in loans by category:

	Allowance for Credit Losses and Recorded Investment in Loans
(unaudited, in thousands)	Commercial Real Estate- Land and Construction		Commercial Real Estate- Improved Property		Commercial and Industrial		Residential Real Estate		Home Equity		Consumer		Over-draft		Total
September 30, 2015
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	1,152	$	1,498	$	—	$	—	$	—	$	—	$	2,650
Allowance for loans collectively evaluated for impairment		4,829		14,095		8,088		4,697		2,686		4,000		579		38,974
Allowance for loan commitments		203		21		249		9		109		39		—		630
Total allowance for credit losses	$	5,032	$	15,268	$	9,835	$	4,706	$	2,795	$	4,039	$	579	$	42,254
Portfolio loans:
Individually evaluated for impairment (1)	$	873	$	12,468	$	4,884	$	—	$	—	$	—	$	—	$	18,225
Collectively evaluated for impairment		325,881		1,844,116		720,846		1,243,630		403,387		394,557		—		4,932,417
Total portfolio loans	$	326,754	$	1,856,584	$	725,730	$	1,243,630	$	403,387	$	394,557	$	—	$	4,950,642
December 31, 2014
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	2,765	$	1,033	$	—	$	—	$	—	$	—	$	3,798
Allowance for loans collectively evaluated for impairment		5,654		14,808		8,030		5,382		2,329		4,078		575		40,856
Allowance for loan commitments		194		10		112		9		90		40		—		455
Total allowance for credit losses	$	5,848	$	17,583	$	9,175	$	5,391	$	2,419	$	4,118	$	575	$	45,109
Portfolio loans:
Individually evaluated for impairment (1)	$	—	$	11,469	$	2,844	$	—	$	—	$	—	$	—	$	14,313
Collectively evaluated for impairment		262,643		1,671,348		635,566		928,770		330,031		244,095		—		4,072,453
Total portfolio loans	$	262,643	$	1,682,817	$	638,410	$	928,770	$	330,031	$	244,095	$	—	$	4,086,766

⁽¹⁾  Commercial loans greater than $1 million that are reported as non-accrual or as troubled debt restructuring (“TDR”), including acquired with deteriorated credit quality, are individually evaluated for impairment.

WesBanco maintains an internal loan grading system to reflect the credit quality of commercial loans. Commercial loan risk grades are determined based on an evaluation of the relevant characteristics of each loan, assigned at the inception of each loan and adjusted thereafter at any time to reflect changes in the risk profile throughout the life of each loan. The primary factors used to determine the risk grade are the reliability and sustainability of the primary source of repayment and overall financial strength of the borrower. This includes an analysis of cash flow available to repay debt, profitability, liquidity, leverage, and overall financial trends. Other factors include management, industry or property type risks, an assessment of secondary sources of repayment such as collateral or guarantees, other terms and conditions of the loan that may increase or reduce its risk, and economic conditions and other external factors that may influence repayment capacity and financial condition.

Commercial real estate – land and construction consists of loans to finance investments in vacant land, land development, construction of residential housing, and construction of commercial buildings. Commercial real estate – improved property consists of loans for the purchase or refinance of all types of improved owner-occupied and investment properties. Factors that are considered in assigning the risk grade vary depending on the type of property financed. The risk grade assigned to construction and development loans is based on the overall viability of the project, the experience and financial capacity of the developer or builder to successfully complete the project, project specific and market absorption rates and comparable property values, and the amount of pre-sales for residential housing construction or pre-leases for commercial investment property. The risk grade assigned to commercial investment property loans is based primarily on the adequacy of net rental income generated by the property to service the debt, the type, quality, industry and mix of tenants, and the terms of leases, but also considers the overall financial capacity of the investors and their experience in owning and managing investment property. The risk grade assigned to owner-occupied commercial real estate and commercial and industrial loans is based primarily on historical and projected earnings, the adequacy of operating cash flow to service all of the business’ debt, and the capital resources, liquidity and leverage of the business, but also considers the industry in which the business operates, the business’ specific competitive advantages or disadvantages, the quality and experience of management, and external influences on the business such as economic conditions. Other factors that are considered for commercial and industrial loans include the type, quality and marketability of non-real estate collateral and whether the structure of the loan increases or reduces its risk. The type, age, condition, location and any environmental risks associated with a property are also considered for all types of commercial real estate. The overall financial condition and repayment capacity of any guarantors is also evaluated to determine the extent to which they mitigate other risks of the loan. The following paragraphs provide descriptions of risk grades that are applicable to commercial real estate and commercial and industrial loans.

Pass loans are those that exhibit a history of positive financial results that are at least comparable to the average for their industry or type of real estate. The primary source of repayment is acceptable and these loans are expected to perform satisfactorily during most economic cycles. Pass loans typically have no significant external factors that are expected to adversely affect these borrowers more than others in the same industry or property type. Any minor unfavorable characteristics of these loans are outweighed or mitigated by other positive factors including but not limited to adequate secondary or tertiary sources of repayment.

Criticized or compromised loans are currently protected but have weaknesses, which, if not corrected, may be inadequately protected at some future date. These loans represent an unwarranted credit risk and would generally not be extended in the normal course of lending. Specific issues which may warrant this grade include declining financial results, increased reliance on secondary sources of repayment or guarantor support and adverse external influences that may negatively impact the business or property.

13

Substandard and doubtful loans are equivalent to the classifications used by banking regulators. Substandard loans are inadequately protected by the current repayment capacity and equity of the borrower or collateral pledged, if any. Substandard loans have one or more well-defined weaknesses that jeopardize their repayment or collection in full. These loans may or may not be reported as non-accrual. Doubtful loans have all the weaknesses inherent to a substandard loan with the added characteristic that full repayment is highly questionable or improbable on the basis of currently existing facts, conditions and collateral values. However, recognition of loss may be deferred if there are reasonably specific pending factors that will reduce the risk if they occur.

The following tables summarize commercial loans by their assigned risk grade:

	Commerical Loans by Internally Assigned Risk Grade
(unaudited, in thousands)	Commercial Real Estate- Land and Construction		Commercial Real Estate- Improved Property		Commercial & Industrial		Total Commercial Loans
As of September 30, 2015
Pass	$	316,128	$	1,807,011	$	704,472	$	2,827,611
Criticized - compromised		8,170		13,895		10,188		32,253
Classified - substandard		2,456		35,678		11,070		49,204
Classified - doubtful		—		—		—		—
Total	$	326,754	$	1,856,584	$	725,730	$	2,909,068
As of December 31, 2014
Pass	$	257,218	$	1,627,771	$	617,742	$	2,502,731
Criticized - compromised		3,645		17,873		12,770		34,288
Classified - substandard		1,780		37,173		7,898		46,851
Classified - doubtful		—		—		—		—
Total	$	262,643	$	1,682,817	$	638,410	$	2,583,870

Residential real estate, home equity and consumer loans are not assigned internal risk grades other than as required by regulatory guidelines that are based primarily on the age of past due loans. WesBanco primarily evaluates the credit quality of residential real estate, home equity and consumer loans based on repayment performance and historical loss rates. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard in accordance with regulatory guidelines were $15.4 million at September 30, 2015 and $15.2 million at December 31, 2014, of which $2.8 and $2.2 million were accruing, for each period, respectively. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard are not included in the tables above.

14

Acquired Loans - Loans acquired in connection with acquisitions are recorded at their acquisition-date fair value in accordance with ASC 805, Business Combinations, with no carryover of related allowance for credit losses. Determining the fair value of the acquired loans involves estimating the principal and interest cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. Management considers a number of factors in evaluating the acquisition-date fair value including the remaining life of the acquired loans, delinquency status, estimated prepayments, payment options and other loan features, internal risk grade, estimated value of the underlying collateral and interest rate environment.

Loans acquired with deteriorated credit quality are accounted for in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality (ASC 310-30), and therefore impaired if, at acquisition, the loans have evidence of credit quality deterioration since origination and it is probable that all contractually required payments will not be collected. At acquisition, WesBanco considers several factors as indicators that an acquired loan has evidence of deterioration in credit quality. These factors include loans 90 days or more past due, loans with an internal risk grade of substandard or below, loans classified as non-accrual by the acquired institution, and loans that have been previously modified as a TDR.

Acquired loans that were not individually determined to be impaired are considered performing and are accounted for in accordance with ASC 310-20, Nonrefundable Fees and Other Costs (ASC 310-20), whereby the premium or discount derived from the fair market value adjustment, on a loan-by-loan or pooled basis, is recognized into interest income on a level yield over the remaining expected life of the loan or pool.

Under the ASC 310-30 model, the excess of cash flows expected to be collected at acquisition over recorded fair value is referred to as the accretable yield and is the interest component of expected cash flow. The accretable yield is recognized into income over the remaining life of the loan if the timing and/or amount of cash flows expected to be collected can be reasonably estimated. If the timing or amount of cash flows expected to be collected cannot be reasonably estimated, the cost recovery method of income recognition is used. The difference between the loan’s total scheduled principal and interest payments over all cash flows expected to be collected at acquisition, considering the impact of prepayments, is referred to as the non-accretable difference. The non-accretable difference represents contractually required principal and interest payments which WesBanco does not expect to collect.

Over the life of the loan, management continues to estimate cash flows expected to be collected. Decreases in expected cash flows are recognized as impairments through a charge to the provision for loan losses resulting in an increase in the allowance for loan losses. Subsequent improvements in cash flows result in first, reversal of existing valuation allowances recognized subsequent to acquisition, if any, and next, an increase in the amount of accretable yield to be subsequently recognized in interest income on a prospective basis over the loan’s remaining life.

In conjunction with the ESB acquisition, WesBanco acquired loans with a book value of $716.2 million. These loans were recorded at their fair value of $701.0 million, with $690.1 million categorized as performing. The fair market value adjustment on performing loans of $10.0 million at acquisition date is expected to be recognized into interest income on a level yield basis over the remaining expected life of the performing loans.

Loans acquired with deteriorated credit quality with a book value of $16.1 million and contractually required payments of $21.8 million were recorded at their estimated fair value of $10.9 million. The accretable yield on the acquired impaired loans was estimated at $1.9 million at the acquisition date with $1.4 million remaining at September 30, 2015. For the nine months ended September 30, 2015 accretion recognized in interest income on acquired impaired loans was $0.5 million. The balance of loans acquired with deteriorated credit quality at September 30, 2015, was $9.6 million, of which $8.3 million were categorized as non-accrual and $1.3 million were categorized as accruing TDRs, while the non-accretable difference was $9.0 million. At September 30, 2015 no allowance for loan losses has been recognized related to the acquired impaired loans.

15

The following tables summarize the age analysis of all categories of loans:

	Age Analysis of Loans
(unaudited, in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total Past Due		Total Loans		90 Days or More Past  Due and Accruing (1)
As of September 30, 2015
Commercial real estate:
Land and construction	$	322,921	$	—	$	14	$	3,819	$	3,833	$	326,754	$	2,528
Improved property		1,844,067		2,066		1,887		8,564		12,517		1,856,584		—
Total commercial real estate		2,166,988		2,066		1,901		12,383		16,350		2,183,338		2,528
Commercial and industrial		723,414		79		178		2,059		2,316		725,730		769
Residential real estate		1,230,877		1,419		3,031		8,303		12,753		1,243,630		1,888
Home equity		398,446		2,154		376		2,411		4,941		403,387		516
Consumer		389,776		3,342		971		468		4,781		394,557		378
Total portfolio loans		4,909,501		9,060		6,457		25,624		41,141		4,950,642		6,079
Loans held for sale		10,765		—		—		—		—		10,765		—
Total loans	$	4,920,266	$	9,060	$	6,457	$	25,624	$	41,141	$	4,961,407	$	6,079
Impaired loans included above are as follows:
Non-accrual loans	$	19,854	$	855	$	1,530	$	19,055	$	21,440	$	41,294
TDRs accruing interest (1)		10,830		503		207		490		1,200		12,030
Total impaired	$	30,684	$	1,358	$	1,737	$	19,545	$	22,640	$	53,324
As of December 31, 2014
Commercial real estate:
Land and construction	$	261,356	$	20	$	—	$	1,267	$	1,287	$	262,643	$	71
Improved property		1,665,363		961		4,772		11,721		17,454		1,682,817		—
Total commercial real estate		1,926,719		981		4,772		12,988		18,741		1,945,460		71
Commercial and industrial		634,482		1,834		240		1,854		3,928		638,410		22
Residential real estate		915,968		1,237		3,384		8,181		12,802		928,770		1,306
Home equity		325,291		1,877		895		1,968		4,740		330,031		570
Consumer		240,365		2,571		685		474		3,730		244,095		319
Total portfolio loans		4,042,825		8,500		9,976		25,465		43,941		4,086,766		2,288
Loans held for sale		5,865		—		—		—		—		5,865		—
Total loans	$	4,048,690	$	8,500	$	9,976	$	25,465	$	43,941	$	4,092,631	$	2,288
Impaired loans included above are as follows:
Non-accrual loans	$	7,562	$	2,884	$	5,552	$	22,820	$	31,256	$	38,818
TDRs accruing interest (1)		11,016		151		542		357		1,050		12,066
Total impaired	$	18,578	$	3,035	$	6,094	$	23,177	$	32,306	$	50,884

⁽¹⁾ Loans 90 days or more past due and accruing interest exclude TDRs 90 days or more past due and accruing interest.

Impaired Loans — A loan is considered impaired, based on current information and events, if it is probable that WesBanco will be unable to collect the payments of principal and interest when due according to the contractual terms of the loan agreement. Impaired loans generally included all non-accrual loans and TDRs.

Loans are generally placed on non-accrual when they are 90 days past due unless the loan is well-secured and in the process of collection. Loans may also be placed on non-accrual when full collection of principal is in doubt even if payments on such loans remain current, or may remain on non-accrual if they were past due but subsequently brought current.

Loans are categorized as TDRs when the Bank, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that it would not otherwise consider.

Acquired loans that have experienced a deterioration of credit quality from origination to acquisition for which it is probable that WesBanco will be unable to collect all contractually-required payments receivable, including both principal and interest, are considered impaired.

16

The following tables summarize impaired loans:

	Impaired Loans
	September 30, 2015						December 31, 2014
(unaudited, in thousands)	Unpaid Principal Balance (1)		Recorded Investment		Related Allowance		Unpaid Principal Balance (1)		Recorded Investment		Related Allowance
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	2,485	$	2,319	$	—	$	1,588	$	1,488	$	—
Improved property		24,277		17,234		—		16,480		14,684		—
Commercial and industrial		3,608		2,924		—		3,152		2,597		—
Residential real estate		18,736		17,048		—		20,077		18,544		—
Home equity		3,689		3,310		—		2,890		2,663		—
Consumer		1,421		1,095		—		1,287		1,086		—
Total impaired loans without a specific allowance		54,216		43,930		—		45,474		41,062		—
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—		—		—		—		—
Improved property		5,719		4,510		1,152		7,980		7,980		2,765
Commercial and industrial		6,188		4,884		1,498		1,842		1,842		1,033
Total impaired loans with a specific allowance		11,907		9,394		2,650		9,822		9,822		3,798
Total impaired loans	$	66,123	$	53,324	$	2,650	$	55,296	$	50,884	$	3,798

⁽¹⁾ The difference between the unpaid principal balance and the recorded investment generally reflects amounts that have been previously charged-off and fair market value adjustments on acquired impaired loans.

	Impaired Loans
	For the Three Months Ended										For the Nine Months Ended
	September 30, 2015					September 30, 2014					September 30, 2015				September 30, 2014
	Average		Interest			Average		Interest			Average		Interest		Average		Interest
	Recorded		Income			Recorded		Income			Recorded		Income		Recorded		Income
(unaudited, in thousands)	Investment		Recognized			Investment		Recognized			Investment		Recognized		Investment		Recognized
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	2,414	$	12		$	1,749	$	11		$	2,198	$	30	$	2,099	$	26
Improved property		19,118		245			17,672		169			18,850		708		18,415		322
Commercial and industrial		3,193		37			4,071		(2	)		2,854		99		3,802		87
Residential real estate		17,508		200			18,337		219			18,173		665		18,900		610
Home equity		3,153		34			2,191		13			2,896		75		2,279		48
Consumer		1,142		27			1,087		26			1,176		73		1,131		72
Total impaired loans without a specific allowance		46,528		555			45,107		436			46,147		1,650		46,626		1,165
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—			—		—			—		—		—		—
Improved property		6,011		(56	)		2,269		109			6,617		—		1,499		113
Commercial and industrial		4,707		63			1,938		27			3,256		200		2,134		68
Total impaired loans with a specific allowance		10,718		7			4,207		136			9,873		200		3,633		181
Total impaired loans	$	57,246	$	562		$	49,314	$	572		$	56,020	$	1,850	$	50,259	$	1,346

17

The following tables present the recorded investment in non-accrual loans and TDRs:

	Non-accrual Loans (1)
	September 30,		December 31,
(unaudited, in thousands)	2015		2014
Commercial real estate:
Land and construction	$	1,369	$	1,488
Improved property		19,732		20,227
Total commercial real estate		21,101		21,715
Commercial and industrial		7,591		4,110
Residential real estate		9,331		10,329
Home equity		2,643		1,923
Consumer		628		741
Total	$	41,294	$	38,818

⁽¹⁾  Total non-accrual loans include loans that are also restructured. Such loans are also set forth in the following table as non-accrual TDRs.

	TDRs
	September 30, 2015						December 31, 2014
(unaudited, in thousands)	Accruing		Non- Accrual		Total		Accruing		Non- Accrual		Total
Commercial real estate:
Land and construction	$	950	$	509	$	1,459	$	—	$	464	$	464
Improved property		2,012		9,615		11,627		2,437		1,850		4,287
Total commercial real estate		2,962		10,124		13,086		2,437		2,314		4,751
Commercial and industrial		217		242		459		329		478		807
Residential real estate		7,717		1,826		9,543		8,215		2,074		10,289
Home equity		667		271		938		740		245		985
Consumer		467		198		665		345		309		654
Total	$	12,030	$	12,661	$	24,691	$	12,066	$	5,420	$	17,486

As of September 30, 2015, there were two TDRs greater than $1.0 million. The concessions granted in the majority of loans reported as accruing and non-accrual TDRs are extensions of the maturity date or the amortization period, reductions in the interest rate below the prevailing market rate for loans with comparable characteristics, and/or permitting interest-only payments for longer than three months.

Total TDRs at September 30, 2015 include $9.3 million from the ESB acquisition with $1.3 million accruing and $8.0 million on non-accrual.

The following table presents details related to loans identified as TDRs during the three and nine months ended September 30, 2015 and 2014, respectively:

	New TDRs (1)
	For the Three Months Ended
	September 30, 2015						September 30, 2014
			Pre-		Post-				Pre-		Post-
			Modification		Modification				Modification		Modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(unaudited, dollars in thousands)	Modifications		Investment		Investment		Modifications		Investment		Investment
Commercial real estate:
Land and construction		1	$	13	$	12		—	$	—	$	—
Improved Property		—		—		—		2		475		465
Total commercial real estate		1		13		12		2		475		465
Commercial and industrial		—		—		—		—		—		—
Residential real estate		—		—		—		1		112		112
Home equity		—		—		—		1		58		57
Consumer		—		—		—		2		52		50
Total		1	$	13	$	12		6	$	697	$	684

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

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	New TDRs (1)
	For the Nine Months Ended
	September 30, 2015						September 30, 2014
			Pre-		Post-				Pre-		Post-
			Modification		Modification				Modification		Modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(unaudited, dollars in thousands)	Modifications		Investment		Investment		Modifications		Investment		Investment
Commercial real estate:
Land and construction		8	$	1,065	$	1,002		—	$	—	$	—
Improved property		7		9,336		8,541		4		692		664
Total commercial real estate		15		10,401		9,543		4		692		664
Commercial and industrial		2		42		50		—		—		—
Residential real estate		8		466		447		5		286		278
Home equity		1		7		6		1		59		57
Consumer		19		279		267		12		191		163
Total		45	$	11,195	$	10,313		22	$	1,228	$	1,162

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

The following tables summarize TDRs which defaulted (defined as past due 90 days) during the three and nine months ended September 30, 2015 and 2014, respectively, that were restructured within the last twelve months prior to September 30, 2015 and 2014, respectively:

	Defaulted TDRs (1)
	For the Three Months Ended
	September 30, 2015				September 30, 2014
	Number of		Recorded		Number of		Recorded
(unaudited, dollars in thousands)	Defaults		Investment		Defaults		Investment
Commercial real estate:
Land and construction		—	$	—		—	$	—
Improved property		—		—		—		—
Total commercial real estate		—		—		—		—
Commercial and industrial		—		—		—		—
Residential real estate		—		—		—		—
Home equity		—		—		—		—
Consumer		1		20		—		—
Total		1	$	20		—	$	—

⁽¹⁾  Excludes loans that were either charged-off or cured by period end. The recorded investment is as of September 30, 2015 and 2014, respectively.

	Defaulted TDRs (1)
	For the Nine Months Ended
	September 30, 2015				September 30, 2014
	Number of		Recorded		Number of		Recorded
(unaudited, dollars in thousands)	Defaults		Investment		Defaults		Investment
Commercial real estate:
Land and construction		—	$	—		—	$	—
Improved property		—		—		—		—
Total commercial real estate		—		—		—		—
Commercial and industrial		—		—		—		—
Residential real estate		—		—		1		45
Home equity		1		42		—		—
Consumer		1		20		—		—
Total		2	$	62		1	$	45

⁽¹⁾  Excludes loans that were either charged-off or cured by period end. The recorded investment is as of September 30, 2015 and 2014, respectively.

TDRs that defaulted during the nine month period that were restructured within the last twelve months represented less than 1.0% of the total TDR balance at September 30, 2015. These loans are placed on non-accrual status unless they are both well-secured and in the process of collection. At September 30, 2015, the loans in the table above were not accruing interest.

19

The following table summarizes other real estate owned and repossessed assets included in other assets:

	September 30,		December 31,
(unaudited, in thousands)	2015		2014
Other real estate owned	$	5,967	$	4,920
Repossessed assets		95		162
Total other real estate owned and repossessed assets	$	6,062	$	5,082

Residential real estate included in other real estate owned at September 30, 2015 and December 31, 2014 was $2.0 million and $0.6 million, respectively. At September 30, 2015, formal foreclosure proceedings were in process on residential real estate loans totaling $3.8 million.

NOTE 6. PENSION PLAN

The following table presents the net periodic pension cost for WesBanco’s Defined Benefit Pension Plan (the “Plan”) and the related components:

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
(unaudited, in thousands)	2015			2014			2015			2014
Service cost – benefits earned during year	$	846		$	734		$	2,509		$	2,176
Interest cost on projected benefit obligation		1,228			1,196			3,643			3,549
Expected return on plan assets		(1,950	)		(1,822	)		(5,785	)		(5,407	)
Amortization of prior service cost		7			11			19			33
Amortization of net loss		801			370			2,378			1,100
Net periodic pension cost	$	932		$	489		$	2,764		$	1,451

The Plan covers all employees of WesBanco and its subsidiaries who were hired on or before August 1, 2007 who satisfy minimum age and length of service requirements, and is not available to employees hired after such date.

A minimum required contribution of $3.1 million was due for 2015 which could have been offset by the Plan’s $34.9 million available credit balance. A voluntary contribution of $3.5 million was made in June 2015.

20

NOTE 7. FAIR VALUE MEASUREMENT

Fair value estimates are based on quoted market prices, if available, quoted market prices of similar assets or liabilities, or the present value of expected future cash flows and other valuation techniques. These valuations are significantly affected by discount rates, cash flow assumptions, and risk assumptions used. Therefore, fair value estimates may not be substantiated by comparison to independent markets and are not intended to reflect the proceeds that may be realizable in an immediate settlement of the instruments.

Fair value is determined at one point in time and is not representative of future value. These amounts do not reflect the total value of a going concern organization. Management does not have the intention to dispose of a significant portion of its assets and liabilities and therefore, the unrealized gains or losses should not be interpreted as a forecast of future earnings and cash flows.

The following is a discussion of assets and liabilities measured at fair value on a recurring basis and valuation techniques applied:

Securities available-for-sale: The fair value of securities available-for-sale which are measured on a recurring basis are determined primarily by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other similar securities. These securities are classified within level 1 or 2 in the fair value hierarchy. Certain equity securities that are lightly traded in over-the-counter markets are classified as level 2 in the fair value hierarchy, as quoted market prices may not be available on the fair value measurement date. Positions that are not traded in active markets for which valuations are generated using assumptions not observable in the market or management’s best estimate are classified within level 3 of the fair value hierarchy. This includes certain specific municipal debt issues for which the credit quality and discount rate must be estimated.

We may be required from time to time to measure certain assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from application of lower of cost or market accounting or write-downs of individual assets.

Impaired loans: Impaired loans are carried at the lower of cost or the fair value of the collateral for collateral-dependent loans. Collateral may be in the form of real estate or business assets including equipment, inventory and accounts receivable. The use of independent appraisals, discounted cash flow models and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral and impaired loans are therefore classified within level 3 of the fair value hierarchy.

Other real estate owned and repossessed assets: Other real estate owned and repossessed assets are carried at the lower of the investment in the assets or the fair value of the assets less estimated selling costs. The use of independent appraisals and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral, and therefore other real estate owned and repossessed assets are classified within level 3 of the fair value hierarchy.

Loans held for sale: Loans held for sale are carried, in aggregate, at the lower of cost or fair value. The use of a valuation model using quoted prices of similar instruments are significant inputs in arriving at the fair value and therefore loans held for sale are classified within level 2 of the fair value hierarchy.

21

The following tables set forth WesBanco’s financial assets and liabilities that were accounted for at fair value on a recurring and nonrecurring basis by level within the fair value hierarchy as of September 30, 2015 and December 31, 2014:

			September 30, 2015
			Fair Value Measurements Using:
(unaudited, in thousands)	September 30, 2015		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Recurring fair value measurements
Securities - available-for-sale
Obligations of government agencies	$	80,809	$	—	$	80,809	$	—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,250,448		—		1,250,448		—
Obligations of state and political subdivisions		90,309		—		90,309		—
Corporate debt securities		127,349		—		127,349		—
Equity securities		10,803		7,844		2,959		—
Total securities - available-for-sale	$	1,559,718	$	7,844	$	1,551,874	$	—
Total recurring fair value measurements	$	1,559,718	$	7,844	$	1,551,874	$	—
Nonrecurring fair value measurements
Impaired loans	$	6,744	$	—	$	—	$	6,744
Other real estate owned and repossessed assets		6,062		—		—		6,062
Loans held for sale		10,765		—		10,765		—
Total nonrecurring fair value measurements	$	23,571	$	—	$	10,765	$	12,806
			December 31, 2014
			Fair Value Measurements Using:
(unaudited, in thousands)	December 31, 2014		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Recurring fair value measurements
Securities - available-for-sale
Obligations of government agencies	$	87,736	$	—	$	87,736	$	—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		701,113		—		701,113		—
Obligations of state and political subdivisions		91,433		—		91,433		—
Corporate debt securities		25,996		—		25,996		—
Equity securities		11,146		8,440		2,706		—
Total securities - available-for-sale	$	917,424	$	8,440	$	908,984	$	—
Total recurring fair value measurements	$	917,424	$	8,440	$	908,984	$	—
Nonrecurring fair value measurements
Impaired loans	$	6,024	$	—	$	—	$	6,024
Other real estate owned and repossessed assets		5,082		—		—		5,082
Loans held for sale		5,865		—		5,865		—
Total nonrecurring fair value measurements	$	16,971	$	—	$	5,865	$	11,106

WesBanco’s policy is to recognize transfers between levels as of the actual date of the event or change in circumstances that caused the transfer. There were no transfers between level 1, 2 or 3 for the nine months ended September 30, 2015 or 2014.

22

The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which WesBanco has utilized level 3 inputs to determine fair value:

	Quantitative Information about Level 3 Fair Value Measurements
(unaudited, in thousands)	Fair Value Estimate		Valuation Techniques	Unobservable Input	Range (Weighted Average)
September 30, 2015:
Impaired loans	$	6,744	Appraisal of collateral (1)	Appraisal adjustments (2)	0% to (39.1%) / (20.3%)
				Liquidation expenses (2)	(3.1%) to (8.0%) / (6.9%)
Other real estate owned and repossessed assets		6,062	Appraisal of collateral (1), (3)
December 31, 2014:
Impaired loans	$	6,024	Appraisal of collateral (1)	Appraisal adjustments (2)	0% to (39.7%) / (6.7%)
				Liquidation expenses (2)	(1.2%) to (8.0%) / (6.7%)
Other real estate owned and repossessed assets		5,082	Appraisal of collateral (1), (3)

⁽¹⁾ Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.

⁽²⁾  Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of appraisal adjustments and liquidation expenses are presented as a percent of the appraisal.

⁽³⁾  Includes estimated liquidation expenses and numerous dissimilar qualitative adjustments by management which are not identifiable.

23

The estimated fair values of WesBanco’s financial instruments are summarized below:

					Fair Value Measurements at September 30, 2015
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Financial Assets
Cash and due from banks	$	92,975	$	92,975	$	92,975	$	—	$	—
Securities available-for-sale		1,559,718		1,559,718		7,844		1,551,874		—
Securities held-to-maturity		957,352		983,997		—		983,280		717
Net loans		4,909,018		4,849,478		—		—		4,849,478
Loans held for sale		10,765		10,765		—		10,765		—
Accrued interest receivable		27,000		27,000		27,000		—		—
Bank-owned life insurance		155,894		155,894		155,894		—		—
Financial Liabilities
Deposits		6,193,902		6,203,633		4,563,012		1,640,621		—
Federal Home Loan Bank borrowings		893,117		895,641		—		895,641		—
Other borrowings		84,587		84,590		81,744		2,846		—
Junior subordinated debt		106,196		76,865		—		76,865		—
Accrued interest payable		2,832		2,832		2,832		—		—
					Fair Value Measurements at December 31, 2014
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Financial Assets
Cash and due from banks	$	94,002	$	94,002	$	94,002	$	—	$	—
Securities available-for-sale		917,424		917,424		8,440		908,984		—
Securities held-to-maturity		593,670		619,617		—		618,895		722
Net loans		4,042,112		4,047,648		—		—		4,047,648
Loans held for sale		5,865		5,865		—		5,865		—
Accrued interest receivable		18,481		18,481		18,481		—		—
Bank-owned life insurance		123,298		123,298		123,298		—		—
Financial Liabilities
Deposits		5,048,983		5,056,828		3,743,887		1,312,941		—
Federal Home Loan Bank borrowings		223,126		225,456		—		225,456		—
Other borrowings		80,690		80,696		77,534		3,162		—
Junior subordinated debt		106,176		79,212		—		79,212		—
Accrued interest payable		1,620		1,620		1,620		—		—

The following methods and assumptions were used to measure the fair value of financial instruments recorded at cost on WesBanco’s consolidated balance sheets:

Cash and due from banks: The carrying amount for cash and due from banks is a reasonable estimate of fair value.

Securities held-to-maturity: Fair values for securities held-to-maturity are determined in the same manner as securities available-for-sale which is described above.

Net loans: Fair values for loans are estimated using a discounted cash flow methodology. The discount rates take into account interest rates currently being offered to customers for loans with similar terms, the credit risk associated with the loan and other market factors, including liquidity. The valuation of the loan portfolio reflects discounts that WesBanco believes are consistent with transactions occurring in the marketplace for both performing and distressed loan types. The carrying value that fair value is compared to is net of the allowance for loan losses and other associated premiums and discounts. Due to the significant judgment involved in evaluating credit quality, loans are classified within level 3 of the fair value hierarchy.

Accrued interest receivable: The carrying amount of accrued interest receivable approximates its fair value.

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Bank-owned life insurance: The carrying value of bank-owned life insurance represents the net cash surrender value of the underlying insurance policies, should these policies be terminated. Management believes that the carrying value approximates its fair value.

Deposits: The carrying amount is considered a reasonable estimate of fair value for demand, savings and other variable rate deposit accounts. The fair value of fixed maturity certificates of deposit is estimated by a discounted cash flow method using rates currently offered for deposits of similar remaining maturities.

Federal Home Loan Bank borrowings: The fair value of FHLB borrowings is based on rates currently available to WesBanco for borrowings with similar terms and remaining maturities.

Other borrowings: The carrying amount of federal funds purchased and overnight sweep accounts generally approximate fair value. Other repurchase agreements are based on quoted market prices if available. If market prices are not available, for certain fixed and adjustable rate repurchase agreements, then quoted market prices of similar instruments are used.

Junior subordinated debt owed to unconsolidated subsidiary trusts: Due to the pooled nature of these instruments, which are not actively traded, estimated fair value is based on recent similar transactions of single-issuer trust preferred securities.

Accrued interest payable: The carrying amount of accrued interest payable approximates its fair value.

Off-balance sheet financial instruments: Off-balance sheet financial instruments consist of commitments to extend credit, including letters of credit. Fair values for commitments to extend credit are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present credit standing of the counterparties. The estimated fair value of the commitments to extend credit and letters of credit are insignificant and therefore are not presented in the above tables.

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NOTE 8. COMPREHENSIVE INCOME

The activity in accumulated other comprehensive income for the nine months ended September 30, 2015 and 2014 is as follows:

	Accumulated Other Comprehensive Income (1)
(unaudited, in thousands)	Defined Benefit Pension Plan			Unrealized Gains (Losses) on Securities Available-for-Sale			Unrealized Gains on Securities Transferred from Available-for- Sale to Held-to-Maturity			Total
Balance at December 31, 2014	$	(22,776	)	$	2,892		$	1,059		$	(18,825	)
Other comprehensive income before reclassifications		—			3,105			—			3,105
Amounts reclassified from accumulated other comprehensive income		1,493			(20	)		(199	)		1,274
Period change		1,493			3,085			(199	)		4,379
Balance at September 30, 2015	$	(21,283	)	$	5,977		$	860		$	(14,446	)
Balance at December 31, 2013	$	(7,966	)	$	(6,126	)	$	1,358		$	(12,734	)
Other comprehensive income before reclassifications		—			5,344			—			5,344
Amounts reclassified from accumulated other comprehensive income		716			(525	)		(224	)		(33	)
Period change		716			4,819			(224	)		5,311
Balance at September 30, 2014	$	(7,250	)	$	(1,307	)	$	1,134		$	(7,423	)

⁽¹⁾  All amounts are net of tax. Related income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 37%.

The following table provides details about amounts reclassified from accumulated other comprehensive income for the three and nine months ended September 30, 2015 and 2014:

Details about Accumulated Other Comprehensive Income Components	For the Three Months Ended September 30,						For the Nine Months Ended September 30,						Affected Line Item in the Statement of Net Income
(unaudited, in thousands)	2015			2014			2015			2014
Securities available-for-sale (1):
Net securities gains reclassified into earnings	$	(11	)	$	(583	)	$	(32	)	$	(831	)	Net securities gains (Non-interest income)
Related income tax expense		4			214			12			306		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		(7	)		(369	)		(20	)		(525	)
Securities held-to-maturity (1):
Amortization of unrealized gain transferred from available-for-sale		(104	)		(84	)		(317	)		(354	)	Interest and dividends on securities (Interest and dividend income)
Related income tax expense		38			31			118			130		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		(66	)		(53	)		(199	)		(224	)
Defined benefit pension plan (2):
Amortization of net loss and prior service costs		808			382			2,397			1,134		Employee benefits (Non-interest expense)
Related income tax benefit		(296	)		(140	)		(904	)		(418	)	Provision for income taxes
Net effect on accumulated other comprehensive income for the period		512			242			1,493			716
Total reclassifications for the period	$	439		$	(180	)	$	1,274		$	(33	)

⁽¹⁾ For additional detail related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income see Note 4, “Securities.”

⁽²⁾ Included in the computation of net periodic pension cost. See Note 6, “Pension Plan” for additional detail.

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NOTE 9. COMMITMENTS AND CONTINGENT LIABILITIES

Commitments — In the normal course of business, WesBanco offers off-balance sheet credit arrangements to enable its customers to meet their financing objectives. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. WesBanco’s exposure to credit losses in the event of non-performance by the other parties to the financial instruments for commitments to extend credit and standby letters of credit is limited to the contractual amount of those instruments. WesBanco uses the same credit policies in making commitments and conditional obligations as for all other lending. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The allowance for credit losses associated with commitments was $0.6 million and $0.5 million as of September 30, 2015 and December 31, 2014, respectively, and is included in other liabilities on the Consolidated Balance Sheets.

Letters of credit are conditional commitments issued by banks to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements, including normal business activities, bond financing and similar transactions. Letters of credit are considered guarantees. The liability associated with letters of credit was $0.2 million as of both September 30, 2015 and December 31, 2014.

Contingent obligations to purchase loans funded by other entities include affordable housing plan guarantees and credit card guarantees. Affordable housing plan guarantees are performance guarantees for various building project loans. The guarantee amortizes as the loan balances decrease. Credit card guarantees are credit card balances not owned by WesBanco, whereby the Bank guarantees the performance of the cardholder.

The following table presents total commitments to extend credit, guarantees and various letters of credit outstanding:

	September 30,		December 31,
(unaudited, in thousands)	2015		2014
Lines of credit	$	1,162,715	$	984,352
Loans approved but not closed		283,912		116,757
Overdraft limits		106,025		95,965
Letters of credit		27,605		23,362
Contingent obligations to purchase loans funded by other entities		9,256		8,312

Contingent Liabilities — WesBanco is a party to various legal and administrative proceedings and claims. While any litigation contains an element of uncertainty, management does not believe that a material loss related to such proceedings or claims pending or known to be threatened is reasonably possible.

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NOTE 10. BUSINESS SEGMENTS

WesBanco operates two reportable segments: community banking and trust and investment services. WesBanco’s community banking segment offers services traditionally offered by full-service commercial banks, including commercial demand, individual demand and time deposit accounts, as well as commercial, mortgage and individual installment loans, and certain non-traditional offerings, such as insurance and securities brokerage services. The trust and investment services segment offers trust services as well as various alternative investment products including mutual funds. The market value of assets managed or held in custody by the trust and investment services segment was approximately $3.7 billion and $3.8 billion at September 30, 2015 and 2014, respectively. These assets are held by WesBanco in fiduciary or agency capacities for their customers and therefore are not included as assets on WesBanco’s Consolidated Balance Sheets.

Condensed financial information by business segment is presented below:

(unaudited, in thousands)	Community Banking		Trust and Investment Services		Consolidated
For the Three Months ended September 30, 2015:
Interest income	$	66,935	$	—	$	66,935
Interest expense		6,326		—		6,326
Net interest income		60,609		—		60,609
Provision for credit losses		1,798		—		1,798
Net interest income after provision for credit losses		58,811		—		58,811
Non-interest income		13,060		5,126		18,186
Non-interest expense		44,039		2,942		46,981
Income before provision for income taxes		27,832		2,184		30,016
Provision for income taxes		6,894		874		7,768
Net income	$	20,938	$	1,310	$	22,248
For the Three Months ended September 30, 2014:
Interest income	$	54,303	$	—	$	54,303
Interest expense		5,692		—		5,692
Net interest income		48,611		—		48,611
Provision for credit losses		1,478		—		1,478
Net interest income after provision for credit losses		47,133		—		47,133
Non-interest income		11,558		5,096		16,654
Non-interest expense		36,292		2,971		39,263
Income before provision for income taxes		22,399		2,125		24,524
Provision for income taxes		5,508		850		6,358
Net income	$	16,891	$	1,275	$	18,166
For the Nine Months ended September 30, 2015:
Interest income	$	194,052	$	—	$	194,052
Interest expense		17,685		—		17,685
Net interest income		176,367		—		176,367
Provision for credit losses		5,768		—		5,768
Net interest income after provision for credit losses		170,599		—		170,599
Non-interest income		37,785		16,655		54,440
Non-interest expense		137,903		9,126		147,029
Income before provision for income taxes		70,481		7,529		78,010
Provision for income taxes		17,238		3,012		20,250
Net income	$	53,243	$	4,517	$	57,760
For the Nine Months ended September 30, 2014:
Interest income	$	161,805	$	—	$	161,805
Interest expense		17,562		—		17,562
Net interest income		144,243		—		144,243
Provision for credit losses		4,526		—		4,526
Net interest income after provision for credit losses		139,717		—		139,717
Non-interest income		35,990		15,954		51,944
Non-interest expense		110,485		9,176		119,661
Income before provision for income taxes		65,222		6,778		72,000
Provision for income taxes		15,827		2,711		18,538
Net income	$	49,395	$	4,067	$	53,462

Total non-fiduciary assets of the trust and investment services segment were $3.6 million and $4.0 million at September 30, 2015 and 2014, respectively. All other assets, including goodwill and other intangible assets, were allocated to the community banking segment.

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

Management’s Discussion and Analysis (“MD&A”) represents an overview of the results of operations and financial condition of WesBanco for the three and nine months ended September 30, 2015. This discussion and analysis should be read in conjunction with the Consolidated Financial Statements and Notes thereto.

FORWARD-LOOKING STATEMENTS

Forward-looking statements in this report relating to WesBanco’s plans, strategies, objectives, expectations, intentions and adequacy of resources, are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. The information contained in this report should be read in conjunction with WesBanco’s Form 10-K for the year ended December 31, 2014 and documents subsequently filed by WesBanco with the Securities and Exchange Commission (“SEC”), including WesBanco’s Form 10-Q for the quarters ended March 31 and June 30, 2015, which are available at the SEC’s website, www.sec.gov or at WesBanco’s website, www.wesbanco.com. Investors are cautioned that forward-looking statements, which are not historical fact, involve risks and uncertainties, including those detailed in WesBanco’s most recent Annual Report on Form 10-K filed with the SEC under “Risk Factors” in Part I, Item 1A. Such statements are subject to important factors that could cause actual results to differ materially from those contemplated by such statements, including, without limitation, the effects of changing regional and national economic conditions; changes in interest rates, spreads on earning assets and interest-bearing liabilities, and associated interest rate sensitivity; sources of liquidity available to WesBanco and its related subsidiary operations; potential future credit losses and the credit risk of commercial, real estate, and consumer loan customers and their borrowing activities; actions of the Federal Reserve Board, the Federal Deposit Insurance Corporation, the SEC, the Financial Institution Regulatory Authority, the Municipal Securities Rulemaking Board, the Securities Investors Protection Corporation, and other regulatory bodies; potential legislative and federal and state regulatory actions and reform, including, without limitation, the impact of the implementation of the Dodd-Frank Act; adverse decisions of federal and state courts; fraud, scams and schemes of third parties; internet hacking; competitive conditions in the financial services industry; rapidly changing technology affecting financial services; marketability of debt instruments and corresponding impact on fair value adjustments; and/or other external developments materially impacting WesBanco’s operational and financial performance. WesBanco does not assume any duty to update forward-looking statements.

OVERVIEW

WesBanco is a multi-state bank holding company with total assets of approximately $8.5 billion, operating through 141 branches, one loan production office and 129 ATM machines in West Virginia, Ohio and western Pennsylvania, offering retail banking, corporate banking, personal and corporate trust services, brokerage services, mortgage banking and insurance. WesBanco’s businesses are significantly impacted by economic factors such as market interest rates, federal monetary and regulatory policies, local and regional economic conditions and the competitive environment’s effect upon WesBanco’s business volumes. WesBanco’s deposit levels are affected by numerous factors including personal savings rates, personal income, and competitive rates on alternative investments, as well as competition from other financial institutions within the markets we serve and liquidity needs of WesBanco. Loan levels are also subject to various factors including construction demand, business financing needs, consumer spending and interest rates, as well as loan terms offered by competing lenders.

On February 10, 2015, WesBanco completed the acquisition of ESB, a Pennsylvania savings bank holding company headquartered in Ellwood City, Lawrence County, northwest of Pittsburgh, PA, with approximately $2.0 billion in assets and 23 offices in four southwestern PA counties, three of which were in the Pittsburgh Metropolitan Statistical Area (“MSA”). The transaction expanded WesBanco’s franchise in western Pennsylvania from 16 to 38 offices with approximately $1.7 billion in total deposits. ESB’s results were included in WesBanco’s results from the date of the consummation of the merger.

APPLICATION OF CRITICAL ACCOUNTING POLICIES AND ESTIMATES

WesBanco’s critical accounting policies involving the significant judgments and assumptions used in the preparation of the Consolidated Financial Statements as of September 30, 2015 have remained unchanged from the disclosures presented in WesBanco’s Annual Report on Form 10-K for the year ended December 31, 2014 within the section “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

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RESULTS OF OPERATIONS

EARNINGS SUMMARY

Net income for the three months ended September 30, 2015 was $22.2 million, while diluted earnings per share were $0.58, compared to $18.2 million or $0.62 per diluted share for the third quarter of 2014. Net income for the first nine months of 2015 was $57.8 million or $1.55 per diluted share compared to $53.5 million or $1.82 per diluted share for the same period of 2014. For the nine month period ending September 30, 2015, net income excluding after-tax merger-related expenses of $7.2 million, increased 21.5% to $64.9 million (non-GAAP measure) compared to $53.5 million for the same period in 2014, while diluted earnings per share, excluding after-tax merger-related expenses, totaled $1.75 (non-GAAP measure), compared to $1.82 per share for the same 2014 period.

	For the Three Months Ended September 30,									For the Nine Months Ended September 30,
	2015					2014				2015						2014
(unaudited, dollars in thousands, except per share amounts)	Net Income			Diluted Earnings Per Share		Net Income		Diluted Earnings Per Share		Net Income			Diluted Earnings Per Share			Net Income		Diluted Earnings Per Share
Net income (Non-GAAP)(1)	$	22,368		$	0.58	$	18,166	$	0.62	$	64,931		$	1.75		$	53,462	$	1.82
Less: After tax merger-related expenses		(120	)		—		—		—		(7,171	)		(0.20	)		—		—
Net income (GAAP)	$	22,248		$	0.58	$	18,166	$	0.62	$	57,760		$	1.55		$	53,462	$	1.82

(1) The above non-GAAP financial measures used by WesBanco provide information useful to investors in understanding WesBanco’s operating performance and trends, and facilitate comparisons with the performance of WesBanco’s peers.

Net interest income increased $12.0 million or 24.7% in the third quarter of 2015 compared to the third quarter of 2014 due to a 33.3% increase in average earning assets, primarily through the acquisition, and through a 6.3% increase in average loan balances, exclusive of ESB, partially offset by a 22 basis point decrease in the net interest margin. Year-to-date, net interest income increased $32.1 million or 22.3%. The net interest margin decreased to 3.36% in the third quarter compared to 3.58% in the same quarter of 2014. The decrease in the net interest margin is primarily due to a 41 basis point decline in the average rate earned on securities due to lower yields on ESB’s retained securities portfolio and other purchased securities, while rates on loans decreased by 15 basis points due to repricing of existing loans and competitive pricing on new loans. The lower rates were due to the low interest rate environment and were somewhat mitigated by a reduction in funding costs of 9 basis points. In addition, the aforementioned loan growth improves asset yields as the average rate on loans is higher than the average rate on securities. Funding costs continued to decrease in 2015 as a result of a 31 basis point decrease in the average rate on CDs as higher-rate CDs matured. Overall, average deposits increased by 21.9% in the third quarter of 2015 compared to the same quarter of 2014 with a decrease in total rate of 10 basis points on interest bearing deposits. To replace funding from runoff of higher cost CDs, increased average FHLB borrowings of intermediate terms in the first nine months of 2015 resulted in an increase in the third quarter cost of FHLB borrowings by 11 basis points compared to the third quarter of 2014. The decline in the net interest margin is also due to asset and liability mix shifts post-ESB, with a greater percentage of lower-yielding investment securities and a greater percentage of CDs versus lower-cost deposit types. Compared to the second quarter of 2015, margin compression resulted primarily due to repricing of existing loans and competitive pricing on new loans. Year-to-date the net interest margin decreased to 3.44% from 3.62% in the same period of 2014, as a result of changes to individual balances and rates similar to the third quarter.

The provision for credit losses was $1.8 million in the third quarter of 2015 compared to $1.5 million in the same quarter of 2014. Year-to-date, the provision was $5.8 million compared to $4.5 million for 2014. Net charge-offs for the first nine months of 2015 were $8.6 million or 0.24% of average portfolio loans compared to $6.9 million for the same period of 2014, also representing 0.24% of average portfolio loans. The increase in charge-offs was primarily due to two non-energy industry-related commercial credits placed on nonaccrual and charged-down by $2.5 million. However, other credit metrics continue to improve overall.

For the third quarter of 2015, non-interest income increased $1.5 million or 9.2% compared to the third quarter of 2014. Service charges on deposits increased $0.3 million or 6.1% from the addition of ESB and an overall higher fee schedule. Electronic banking fees increased $0.6 million or 17.8% from increases in transaction volume. Net securities brokerage revenue increased by $0.3 million or 17.3% through the addition of support and sales staff in several regions. Net gains on sales of mortgage loans increased $0.2 million or 41.6% from increases in originations and a larger percentage of originations being sold into the secondary market. Net losses on other real estate owned and other assets improved by $1.1 million due to a $1.4 million charge in the third quarter of 2014 relating to the prepayment of a repurchase agreement with another bank. These increases were partially offset by a decrease in net securities gains of $0.5 million and lower other service fee income, primarily customer loan swap fees. For the first nine months of 2015, non-interest income increased by $2.5 million or 4.8%, reflecting similar trends as in the third quarter, while trust fees increased $0.7 million or 4.4% for the year-to-date period from higher fees and customer development initiatives.

In the third quarter of 2015, net revenue growth of 20.7% outpaced non-interest expense growth of 19.2%, excluding merger-related expenses of $0.2 million, compared to the third quarter of 2014. As a result, the efficiency ratio (net of merger-related expenses) improved in the current quarter to 57.6% from 58.5% in the third quarter of 2014. Overall non-interest expense increased $7.7 million in the third quarter, principally from the acquisition which increased assets by $2.0 billion and added 23 offices to our branch network, and $0.2 million of merger-related expenses. Salaries and wages increased $2.5 million or 14.4%, due to an increase in average full-time equivalent employees from the merger, increased stock compensation costs and routine annual adjustments to compensation, partially offset by increased deferrals of compensation costs on new loan originations. Employee benefits expense increased $1.0 million or 19.3%, primarily from increased pension, health insurance, social security contributions and other benefit plan costs. Net occupancy increased $0.6 million principally due to increased building-related costs including utilities, lease expense, and depreciation. Equipment costs increased $0.9 million related to continuous improvements in computer system infrastructure, and origination and customer support systems. Amortization of intangible assets increased $0.3 million from additional ESB intangible assets, primarily related to core deposits. Year-to-date through September 30, 2015, non-interest expense for the combined company increased by $16.3 million or 13.7%, excluding merger-related expenses, compared to the first nine months of 2014, reflecting factors similar to the three month period.

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The provision for federal and state income taxes increased to $20.3 million in 2015 compared to $18.5 million in the first nine months of 2014. The increase in income tax expense was due to an increase in pre-tax income, partially offset by a $0.5 million benefit relating to the completion of an IRS audit which closed the 2011 and 2012 tax years, which resulted in an effective tax rate of 26.0% for 2015 compared to 25.8% for 2014.

NET INTEREST INCOME

TABLE 1. NET INTEREST INCOME

	For the Three Months Ended September 30,						For the Nine Months  Ended September 30,
(unaudited, dollars in thousands)	2015			2014			2015			2014
Net interest income	$	60,609		$	48,611		$	176,367		$	144,243
Taxable equivalent adjustments to net interest income		2,442			1,838			6,526			5,511
Net interest income, fully taxable equivalent	$	63,051		$	50,449		$	182,893		$	149,754
Net interest spread, non-taxable equivalent		3.15	%		3.34	%		3.24	%		3.38	%
Benefit of net non-interest bearing liabilities		0.08	%		0.11	%		0.08	%		0.11	%
Net interest margin		3.23	%		3.45	%		3.32	%		3.49	%
Taxable equivalent adjustment		0.13	%		0.13	%		0.12	%		0.13	%
Net interest margin, fully taxable equivalent		3.36	%		3.58	%		3.44	%		3.62	%

Net interest income, which is WesBanco’s largest source of revenue, is the difference between interest income on earning assets, primarily loans and securities, and interest expense on liabilities (deposits and short and long-term borrowings). Net interest income is affected by the general level and changes in interest rates, the steepness and shape of the yield curve, changes in the amount and composition of interest earning assets and interest bearing liabilities, as well as the frequency of repricing of existing assets and liabilities. Net interest income increased $12.0 million or 24.7% in the third quarter of 2015 compared to the third quarter of 2014 due to a 33.3% increase in average earning assets, primarily from the acquisition, and through a 6.3% increase in average loan balances, exclusive of ESB, partially offset by a 22 basis point decrease in the net interest margin. Year-to-date, net interest income increased $32.1 million or 22.3%. Average loan balances increased by $950.6 million or 23.9% from the third quarter of 2014, of which $228.0 million of the increase was from organic loan growth. Total average deposits increased by $1.1 billion or 21.9% as all major categories within deposits increased. Excluding the ESB acquisition, average certificates of deposit, which have the highest interest cost among interest bearing deposits, decreased by $214.3 million or 15.4%, while all other deposit types increased by $181.0 million or 4.8%. These lower-cost and non-interest bearing deposit increases were the result of marketing campaigns, customer incentives, wealth management and business initiatives as well as deposits from Marcellus and Utica shale gas bonus and royalty payments. The net interest margin decreased to 3.36% in the third quarter of 2015 compared to 3.58% in the same quarter of 2014, primarily due to a 41 basis point decline in the average rate earned on securities due to lower yields on ESB’s retained securities portfolio and other purchased securities, while rates on loans decreased by 15 basis points. The decrease in the margin is also due to asset and liability mix shifts post-ESB, with a greater percentage of lower-yielding investment securities and a greater percentage of CDs versus lower-cost deposit types. Year-to-date the net interest margin decreased to 3.44% from 3.62% in the same period of 2014, as a result of changes to individual balances and rates similar to the third quarter. The cost of funds continued to improve, declining 9 basis points from the third quarter of 2014 due primarily to a 31 basis point decrease in the average rate on CDs, increases in the percentage of lower-cost and non-interest bearing deposit balances to total deposits and lower rates on other borrowings. Excluding accretion of various purchase accounting adjustments related to recent acquisitions and the interest recognized on a tax refund in 2014, the net interest margin would have been 3.26% and 3.34% in the third quarter and year-to-date periods of 2015, respectively, compared to 3.54% and 3.56% for the same periods of 2014.

Interest income increased in the third quarter of 2015 by $12.6 million or 23.3% and by $32.2 million or 19.9% in the first nine months of 2015 compared to the same periods in 2014 due to higher average balances of earning assets acquired both in the ESB acquisition and organically, partially offset by lower yields on loans and on the investment portfolio. Rates decreased 15 basis points in the third quarter on average loan balances from reduced rates on acquired, newly-originated and contractually-repricing assets due to the necessity of offering lower rates on quality credits in an increasingly competitive and low interest rate environment. However, the increase in average loan balances helped to mitigate the effect of the lower rates, as rates earned on loans are higher than those on securities. In the third quarter of 2015, average loans represented 66.1% of average earning assets, decreasing from 71.1% in the same quarter of 2014 due to the acquired ESB loan portfolio being smaller than the acquired investment portfolio. Total securities yields decreased by 41 basis points in the third quarter of 2015 from the same period in 2014 due to lower yields on ESB’s retained securities portfolio and other purchased securities at current lower available interest rates. The former ESB securities portfolio was also restructured and not fully invested until June which accounted for approximately $0.8 million in potential interest income. Within the investment portfolio, the average rate declined on taxable and tax-exempt securities by 30 and 74 basis points, respectively, from the third quarter of 2014. The average balance of tax-exempt securities, which provide the highest yield within securities, increased $223.1 million or 55.0% over the last year, but were only 25.3% of total average securities in the third quarter of 2015 compared to 25.6% in the third quarter of 2014, further contributing to the overall lower yield on total securities. Taxable securities balances increased by $678.9 million or 57.7% from the third quarter of 2014 as a significant portion of the acquired securities consisted of 10-15 year residential mortgage pools. Shorter-term mortgage pools reduce the average life of the portfolio, particularly for the portion accounted for as available-for-sale, positioning the Bank for possible future increases in interest rates, while maintaining required levels of pledgeable securities.

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Portfolio loans increased $918.9 million in the twelve months ended September 30, 2015 with $701.0 million from the ESB acquisition and $217.9 million from loan growth exclusive of ESB as originations continued to outpace paydowns. Organic loan growth from December 31, 2014, annualized, was 5.3%, primarily due to $1.3 billion in loan originations for the first nine months of 2015 compared to $1.0 billion for the first nine months of last year. Loan growth occurred in all major categories with approximately 30.0% of the growth in commercial and industrial loans. Loan growth was driven by increased business activity, additional commercial and residential lending personnel in our urban markets, focused marketing efforts, and continued improvement in loan origination processes.

Interest expense increased $0.6 million or 11.1% in the third quarter of 2015 and, despite the acquisition of ESB’s deposits of $1.2 billion, only increased $0.1 million or 0.7% in the first nine months of 2015 compared to the same periods in 2014. The increases in the third quarter and first nine month periods were due to an increase in the average balance of FHLB borrowings, generally short to medium term, offset somewhat by a continued reduction in the rate paid on other interest bearing liabilities. Total average interest bearing liabilities increased $1.5 billion or 33.8% in the third quarter due to deposits from the ESB acquisition, increased organic deposits and increased FHLB borrowings. The average rate paid on interest bearing liabilities decreased 9 basis points in the third quarter of 2015 compared to the same period in 2014. Rates paid on overall interest bearing deposits declined by 10 basis points to 0.31% in the third quarter predominantly due to a 31 basis point decline in rates on certificates of deposit from maturities of higher-rate CDs, combined with management reducing offered rates and the repricing of acquired CDs through purchase accounting on the acquisition date at lower market rates. The rates paid on other deposit types remained nearly unchanged in the third quarter and year-to-date periods. Changes in the deposit funding mix somewhat offset the decrease in the rates paid, with average certificates of deposit increasing to 27.3% of total average deposits compared to 27.1% in the third quarter of last year, due exclusively to the acquisition of ESB. WesBanco continues to focus on reducing rate offerings and growing customers with multiple banking relationships, as opposed to single service certificate of deposit customers. To replace funding from the runoff of higher cost CDs, the average balance of FHLB borrowings increased in the third quarter by $616.0 million or 445.8% from the same period of 2014 and was 12.7% of total interest bearing liabilities as compared to 3.1% in the same period of 2014. Due to a shift in the term length of new FHLB borrowings from short to medium, the average rate increased in the third quarter by 11 basis points compared to the same period in 2014.

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TABLE 2. AVERAGE BALANCE SHEETS AND NET INTEREST MARGIN ANALYSIS

	For the Three Months Ended September 30,										For the Nine Months Ended September 30,
	2015					2014					2015					2014
(unaudited, dollars in thousands)	Average Balance		Average Rate			Average Balance		Average Rate			Average Balance		Average Rate			Average Balance		Average Rate
ASSETS
Due from banks - interest bearing	$	10,448		0.19	%	$	20,064		0.24	%	$	16,754		0.17	%	$	31,668		0.23	%
Loans, net of unearned income (1)		4,933,840		4.17	%		3,983,285		4.32	%		4,789,807		4.24	%		3,919,006		4.39	%
Securities: (2)
Taxable		1,854,679		2.21	%		1,175,750		2.51	%		1,719,438		2.23	%		1,164,693		2.52	%
Tax-exempt (3)		628,475		4.44	%		405,338		5.18	%		542,700		4.58	%		403,970		5.20	%
Total securities		2,483,154		2.78	%		1,581,088		3.19	%		2,262,138		2.80	%		1,568,663		3.21	%
Other earning assets (4)		34,712		3.09	%		15,337		2.73	%		24,953		6.43	%		12,600		8.20	%
Total earning assets (3)		7,462,154		3.70	%		5,599,774		3.98	%		7,093,652		3.78	%		5,531,937		4.04	%
Other assets		937,706					709,003					906,112					706,815
Total Assets	$	8,399,860				$	6,308,777				$	7,999,764				$	6,238,752
LIABILITIES AND SHAREHOLDERS’ EQUITY
Interest bearing demand deposits	$	1,193,502		0.17	%	$	894,386		0.18	%	$	1,127,608		0.17	%	$	895,687		0.17	%
Money market accounts		1,007,674		0.19	%		989,935		0.20	%		1,006,046		0.19	%		970,189		0.19	%
Savings deposits		1,070,179		0.06	%		826,048		0.06	%		1,035,882		0.06	%		819,863		0.06	%
Certificates of deposit		1,708,206		0.62	%		1,391,740		0.93	%		1,732,117		0.65	%		1,446,443		0.95	%
Total interest bearing deposits		4,979,561		0.31	%		4,102,109		0.41	%		4,901,653		0.32	%		4,132,182		0.43	%
Federal Home Loan Bank borrowings		754,194		0.87	%		138,175		0.76	%		493,788		0.85	%		66,421		1.31	%
Other borrowings		103,461		0.34	%		95,915		1.44	%		105,573		0.32	%		105,046		1.60	%
Junior subordinated debt		106,196		2.83	%		106,161		3.01	%		118,085		2.88	%		106,151		3.01	%
Total interest bearing liabilities (1)		5,943,412		0.42	%		4,442,360		0.51	%		5,619,099		0.42	%		4,409,800		0.53	%
Non-interest bearing demand deposits		1,285,509					1,036,173					1,250,913					1,014,061
Other liabilities		62,323					42,572					92,258					41,597
Shareholders’ equity		1,108,616					787,672					1,037,494					773,294
Total Liabilities and Shareholders’ Equity	$	8,399,860				$	6,308,777				$	7,999,764				$	6,238,752
Taxable equivalent net interest spread				3.28	%				3.47	%				3.36	%				3.51	%
Taxable equivalent net interest margin				3.36	%				3.58	%				3.44	%				3.62	%

(1) Gross of allowance for loan losses and net of unearned income. Includes non-accrual and loans held for sale. Loan fees included in interest income on loans totaled $40 thousand and $0.8 million for the three months ended September 30, 2015 and 2014, respectively, and $0.8 million and $2.5 million for the nine months ended September 30, 2015 and 2014, respectively. Additionally, loan accretion included in net interest income on loans acquired from prior acquisitions was $1.1 million and $0.4 million for the three months ended September 30, 2015 and 2014, respectively, and $3.0 million and $1.1 million for the nine months ended September 30, 2015 and 2014, respectively, while accretion on interest bearing liabilities from prior acquisitions was $0.8 million and $0.2 million for the three months ended September 30, 2015 and 2014, respectively, and $2.7 million and $0.6 million for the nine months ended September 30, 2015 and 2014, respectively.

(2) Average yields on available-for-sale securities are calculated based on amortized cost and include premium amortization and discount accretion from prior acquisitions.

(3) Taxable equivalent basis is calculated on tax-exempt securities using a tax rate of 35% for each year presented.

(4) Interest income on other earning assets includes $0.6 million of a special dividend from FHLB Pittsburgh for the nine months ended September 30, 2015 and $0.5 million of interest on a federal income tax refund for the nine months ended September 30, 2014.

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TABLE 3. RATE/VOLUME ANALYSIS OF CHANGES IN INTEREST INCOME AND INTEREST EXPENSE

	Three Months Ended September 30, 2015 Compared to September 30, 2014									Nine Months Ended September 30, 2015 Compared to September 30, 2014
(unaudited, in thousands)	Volume			Rate			Net  Increase (Decrease)			Volume			Rate			Net  Increase (Decrease)
Increase (decrease) in interest income:
Due from banks - interest bearing	$	(5	)	$	(2	)	$	(7	)	$	(23	)	$	(10	)	$	(33	)
Loans, net of unearned income		10,040			(1,563	)		8,477			27,749			(4,527	)		23,222
Taxable securities		3,839			(963	)		2,876			9,526			(2,785	)		6,741
Tax-exempt securities (1)		2,563			(837	)		1,726			4,931			(2,029	)		2,902
Other earning assets		147			17			164			627			(196	)		431
Total interest income change (1)		16,584			(3,348	)		13,236			42,810			(9,547	)		33,263
Increase (decrease) in interest expense:
Interest bearing demand deposits		130			(12	)		118			295			(38	)		257
Money market accounts		9			(11	)		(2	)		51			(15	)		36
Savings deposits		38			(8	)		30			100			(23	)		77
Certificates of deposit		640			(1,232	)		(592	)		1,787			(3,689	)		(1,902	)
Federal Home Loan Bank borrowings		1,342			44			1,386			2,807			(300	)		2,507
Other borrowings		25			(284	)		(259	)		6			(1,007	)		(1,001	)
Junior subordinated debt		—			(47	)		(47	)		260			(111	)		149
Total interest expense change		2,184			(1,550	)		634			5,306			(5,183	)		123
Net interest income increase (decrease) (1)	$	14,400		$	(1,798	)	$	12,602		$	37,504		$	(4,364	)	$	33,140

(1) Taxable equivalent basis is calculated on tax-exempt securities using a tax rate of 35% for each year presented.

PROVISION FOR CREDIT LOSSES

The provision for credit losses is the amount to be added to the allowance for credit losses after net charge-offs have been deducted to bring the allowance to a level considered appropriate to absorb probable losses in the loan portfolio. The provision for credit losses also includes the amount to be added to the reserve for loan commitments to bring that reserve to a level considered appropriate to absorb probable losses on unfunded commitments. The provision for credit losses was $1.8 million in the third quarter of 2015 compared to $1.5 million in the same quarter of 2014. Year-to-date, the provision was $5.8 million compared to $4.5 million for 2014. Net charge-offs for the first nine months of 2015 were $8.6 million or 0.24% of average portfolio loans compared to $6.9 million for the same period of 2014, also representing 0.24% of average portfolio loans. The increase in charge-offs was primarily due to two non-energy industry-related commercial credits placed on nonaccrual and charged-down by $2.5 million and additional charge-offs from ESB. However, other credit metrics continue to improve overall. Non-performing loans, including TDRs, as well as criticized and classified loans, improved as a percentage of total portfolio loans from their pre-acquisition levels in late 2014. (Please see the Allowance for Credit Losses section of this MD&A for additional discussion).

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NON-INTEREST INCOME

TABLE 4. NON-INTEREST INCOME

	For the Three  Months Ended September 30,												For the Nine Months Ended September 30,
(unaudited, dollars in thousands)	2015			2014			$ Change			% Change			2015		2014			$ Change			% Change
Trust fees	$	5,127		$	5,096		$	31			0.6		$	16,656	$	15,954		$	702			4.4
Service charges on deposits		4,425			4,170			255			6.1			12,342		12,107			235			1.9
Electronic banking fees		3,849			3,268			581			17.8			10,670		9,549			1,121			11.7
Net securities brokerage revenue		1,996			1,701			295			17.3			5,897		5,533			364			6.6
Bank-owned life insurance		1,021			882			139			15.8			3,264		3,577			(313	)		(8.8	)
Net gains on sales of mortgage loans		779			550			229			41.6			1,459		1,178			281			23.9
Net securities gains		47			581			(534	)		(91.9	)		69		756			(687	)		(90.9	)
Net (loss) / gain on other real estate owned and other assets		(18	)		(1,167	)		1,149			98.5			167		(1,218	)		1,385			113.7
Net insurance services revenue		863			665			198			29.8			2,394		2,069			325			15.7
Other		97			908			(811	)		(89.3	)		1,522		2,439			(917	)		(37.6	)
Total non-interest income	$	18,186		$	16,654		$	1,532			9.2		$	54,440	$	51,944		$	2,496			4.8

Non-interest income is a significant source of revenue and an important part of WesBanco’s results of operations. WesBanco offers its customers a wide range of retail, commercial, investment and electronic banking services, which are viewed as a vital component of WesBanco’s ability to attract and maintain customers, as well as providing additional fee income beyond normal spread-related income to WesBanco. For the first nine months of 2015, non-interest income increased $2.5 million or 4.8% compared to 2014. The increase was primarily due to improved electronic banking fees, a net gain on other assets, and higher trust fees, while bank owned-life insurance income was down $0.3 million due to decreased death benefits year over year and other non-interest income was impacted by recent declines in the market value of the deferred compensation plan. For the third quarter non-interest income increased $1.5 million or 9.2%, reflecting similar trends as in the first nine months, however trust fees increased only 0.6% due to due to recent declines in the market value of trust assets.

Trust fees increased 0.6% compared to the third quarter of 2014, and $0.7 million or 4.4% compared to the first nine months of 2014 from higher fees and customer development initiatives. Total trust assets of $3.7 billion at September 30, 2015 decreased 3.5% from September 30, 2014 due to market value declines. At September 30, 2015, trust assets include managed assets of $3.1 billion and non-managed (custodial) assets of $0.6 billion. Assets managed for the WesMark Funds, a proprietary group of mutual funds that is advised by WesBanco’s trust and investment services group, were $896.7 million as of September 30, 2015 and $933.4 million at September 30, 2014 and are included in trust managed assets.

Service charges on deposits increased $0.3 million or 6.1% compared to the third quarter of 2014 due to the larger customer deposit base from the recent acquisition and an overall higher fee schedule, somewhat offset by lower customer usage patterns.

Electronic banking fees, which include debit card interchange fees, continued to grow, increasing 11.7% compared to the first nine months of 2014, due to a higher volume of debit card transactions from the acquisition and WesBanco’s legacy customers. The volume increase is due to both marketing and process initiatives as well as a higher volume of customers using these products.

Net securities brokerage revenue increased $0.3 million or 17.3% compared to the third quarter of 2014 and $0.4 million or 6.6% compared to the first nine months of 2014 through the addition of support and sales staff in several regions.

Net gains on sales of mortgage loans increased $0.3 million or 23.9% compared to the first nine months of 2014 from increases in originations and a larger percentage of originations being sold into the secondary market. Total mortgage production was $234.2 million in the first nine months of 2015, up 17.3% from the comparable 2014 period. Mortgages sold into the secondary market represented $99.9 million or 42.7% of overall mortgage loan production in the first nine months of 2015 compared to $77.1 million or 38.6% in the first nine months of 2014.

Net gains/(losses) on other assets improved by $1.1 million compared to the third quarter of 2014 due to a $1.4 million charge in the third quarter of 2014 relating to the prepayment of a repurchase agreement with another bank.

Other income decreased $0.8 million compared to the third quarter of 2014 and $0.9 million year-to-date primarily due to market adjustments on the deferred compensation plan and due to lower swap fees on loans.

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NON-INTEREST EXPENSE

TABLE 5. NON-INTEREST EXPENSE

	For the Three  Months Ended September 30,										For the Nine Months Ended September 30,
(unaudited, dollars in thousands)	2015		2014		$ Change			% Change			2015		2014		$ Change			% Change
Salaries and wages	$	19,832	$	17,331	$	2,501			14.4		$	57,468	$	50,700	$	6,768			13.3
Employee benefits		6,028		5,051		977			19.3			20,151		16,289		3,862			23.7
Net occupancy		3,533		2,916		617			21.2			10,298		9,265		1,033			11.1
Equipment		3,731		2,837		894			31.5			9,689		8,534		1,155			13.5
Marketing		1,514		1,276		238			18.7			4,221		3,992		229			5.7
FDIC insurance		1,064		786		278			35.4			3,014		2,543		471			18.5
Amortization of intangible assets		815		477		338			70.9			2,325		1,454		871			59.9
Restructuring and merger-related expenses		185		—		185			100.0			11,033		—		11,033			100.0
Miscellaneous, franchise, and other taxes		1,507		1,612		(105	)		(6.5	)		4,588		4,849		(261	)		(5.4	)
Postage		1,014		792		222			28.0			2,671		2,484		187			7.5
Consulting, regulatory, accounting and advisory fees		1,146		856		290			33.9			3,634		2,874		760			26.4
Other real estate owned and foreclosure expenses		310		248		62			25.0			325		687		(362	)		(52.7	)
Legal fees		593		654		(61	)		(9.3	)		1,809		2,023		(214	)		(10.6	)
Communications		380		343		37			10.8			1,148		1,217		(69	)		(5.7	)
ATM and interchange expenses		1,171		1,012		159			15.7			3,261		3,185		76			2.4
Supplies		780		591		189			32.0			2,198		1,818		380			20.9
Other		3,378		2,481		897			36.2			9,196		7,747		1,449			18.7
Total non-interest expense	$	46,981	$	39,263	$	7,718			19.7		$	147,029	$	119,661	$	27,368			22.9

Non-interest expense increased $7.7 million in the third quarter of 2015, principally from the acquisition which increased assets by $2.0 billion and added 23 offices to our branch network, and $0.2 million of merger-related expenses. Salaries and wages increased $2.5 million or 14.4%, primarily due to a 13.9% increase in average full-time equivalent employees, while employee benefits expense increased $1.0 million or 19.3%, primarily from increased pension, health insurance, social security contributions and other benefit plan costs. Net occupancy and equipment increased $1.5 million principally due to increased building-related costs, improvements in computer system infrastructure, and origination and customer support systems. Year-to-date through September 30, 2015, non-interest expense increased by $16.3 million or 13.7%, excluding merger-related expenses, compared to the first nine months of 2014, reflecting factors similar to the three month period.

Salaries and wages increased $2.5 million or 14.4% from the third quarter of 2014 and $6.8 million or 13.3% over the first nine months of 2014 due to a 12.9% increase in average full-time equivalent employees primarily from the merger, increased stock compensation costs and routine annual adjustments to compensation, partially offset by increased deferrals of compensation costs on new loan originations. Salaries and wages in 2015 also include $0.8 million related to temporary post-merger personnel costs incurred as a result of the timing of the April 24 weekend systems and branch conversions. Employee benefit expenses increased 23.7% year-to-date, primarily from increased pension, health insurance, social security contributions and other benefit plan costs including the addition of ESB’s personnel.

Net occupancy increased $1.0 million in the first nine months of 2015 principally due to increased building-related costs including utilities, depreciation and other maintenance costs resulting primarily from the additional ESB offices.

Equipment increased $1.2 million in the first nine months of 2015 due to improvements in computer system infrastructure, and loan origination and customer support systems. In addition, teller cash recycling machines introduced into our branches have improved the speed of customer service, improved cash controls and reduced full-time equivalent employees.

Amortization of intangible assets increased $0.9 million in the first nine months of 2015 due to the ESB acquisition, which added approximately $5.3 million in core deposit intangibles and $2.2 million in non-compete agreements with former ESB executives with contracts ranging from one to four years.

Restructuring and merger-related expenses of $11.0 million in 2015 related to the ESB acquisition include $7.8 million in executive change-in-control and employee severance expenses, $1.7 million in investment banking services, $0.5 million in audit and valuation services, $0.4 million in marketing expenses, $0.3 million in legal expenses and $0.3 million of various other merger-related expenses.

Other real estate owned and foreclosure expenses decreased $0.4 million in 2015 compared to 2014 due to lower foreclosure and liquidation activity even as related assets increased. Other real estate owned and repossessed assets increased $1.4 million from the third quarter of 2014 to $6.1 million due to the ESB acquisition.

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INCOME TAXES

The provision for federal and state income taxes increased to $20.3 million in 2015 compared to $18.5 million in the first nine months of 2014. The increase in income tax expense was due to an increase in pre-tax income, partially offset by a $0.5 million benefit relating to the completion of an IRS audit which closed the 2011 and 2012 tax years, which resulted in an effective tax rate of 26.0% for 2015 compared to 25.8% for 2014. The effective tax rate is anticipated to range between 26.0% and 27.0% for the remainder of 2015.

FINANCIAL CONDITION

Total assets increased 34.2% during the first nine months of 2015, while deposits and shareholders’ equity increased 22.7% and 41.6%, respectively, compared to December 31, 2014 primarily due to the acquisition of ESB. Total portfolio loans increased $863.9 million or 21.1% with $701.0 million from the ESB acquisition and the remaining $162.9 million from WesBanco’s originations outpacing pay downs, which were a result of increased business activity, additional lending personnel, focused marketing efforts, an expanded presence in larger urban markets, and continued improvement in the loan origination process. Deposits increased $1.1 billion from the ESB acquisition. Organic deposits were virtually unchanged as demand, savings and money market deposits increased 7.4%, 3.7% and 2.5%, respectively, while certificates of deposit decreased 13.2% due to lower rate offerings on maturities. The increase in demand deposits and savings deposits were attributable to marketing, incentives paid to customers, focused retail and business strategies to obtain more account relationships, and customers’ preference for short-term maturities, coupled with initial deposits from bonus and royalty payments from Marcellus and Utica shale gas energy companies in WesBanco’s southwestern Pennsylvania, eastern Ohio and northern West Virginia markets. Total borrowings increased 164.4% during the first nine months of 2015. FHLB borrowings increased $670.0 million from December 31, 2014, due primarily to $277.9 million in new borrowings, coupled with $392.1 million in FHLB borrowings provided from the ESB acquisition. New borrowings were utilized to manage WesBanco’s normal liquidity needs, including loan and investment funding, as well as certificates of deposit runoff. Total shareholders’ equity increased by approximately $327.6 million or 41.6%, compared to December 31, 2014, primarily due to $293.6 million of common stock issued in the ESB acquisition and net income exceeding dividends for the period by $31.2 million, coupled with a $4.4 million increase in accumulated other comprehensive income.

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TABLE 6. COMPOSITION OF SECURITIES (1)

(unaudited, dollars in thousands)	September 30, 2015			December 31, 2014			$ Change			% Change
Available-for-sale (at fair value)
Obligations of government agencies	$	80,809		$	87,736		$	(6,927	)		(7.9	)
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,250,448			701,113			549,335			78.4
Obligations of states and political subdivisions		90,309			91,433			(1,124	)		(1.2	)
Corporate debt securities		127,349			25,996			101,353			389.9
Total debt securities		1,548,915			906,278			642,637			70.9
Equity securities		10,803			11,146			(343	)		(3.1	)
Total available-for-sale securities	$	1,559,718		$	917,424		$	642,294			70.0
Held-to-maturity (at amortized cost)
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies	$	161,495		$	79,004		$	82,491			104.4
Obligations of states and political subdivisions		766,423			507,927			258,496			50.9
Corporate debt securities		29,434			6,739			22,695			336.8
Total held-to-maturity securities		957,352			593,670			363,682			61.3
Total securities	$	2,517,070		$	1,511,094		$	1,005,976			66.6
Available-for-sale securities:
Weighted average yield at the respective period end (2)		2.10	%		2.34	%
As a % of total securities		62.0	%		60.7	%
Weighted average life (in years)		4.0			4.0
Held-to-maturity securities:
Weighted average yield at the respective period end (2)		4.07	%		4.67	%
As a % of total securities		38.0	%		39.3	%
Weighted average life (in years)		5.5			5.1
Total securities:
Weighted average yield at the respective period end (2)		2.86	%		3.27	%
As a % of total securities		100.0	%		100.0	%
Weighted average life (in years)		4.6			4.4

(1) At September 30, 2015 and December 31, 2014, there were no holdings of any one issuer, other than the U.S. government and certain federal or federally-related agencies, in an amount greater than 10% of WesBanco’s shareholders’ equity.

(2) Weighted average yields have been calculated on a taxable-equivalent basis using the federal statutory tax rate of 35%.

Total investment securities, which are a source of liquidity for WesBanco as well as a contributor to interest income, increased by $1.0 billion or 66.6% from December 31, 2014 to September 30, 2015. This increase is attributable to the ESB acquisition, from both inherited securities of $486.9 million and newly purchased securities in the three to four month period thereafter totaling $604.6 million to replace those securities sold from ESB’s portfolio prior to closing. Partially offsetting the acquired securities and purchases in the first nine months of 2015 were maturities, paydowns, and calls that totaled $273.2 million, which were generally replaced with other similar securities in the third quarter. Through the first nine months of 2015, the available-for-sale portfolio increased by $642.3 million or 70.0%, while the held-to-maturity portfolio increased by $363.7 million or 61.3%. The weighted average yield of the portfolio declined from 3.27% at December 31, 2014 to 2.86% at September 30, 2015 due to the lower-yielding ESB acquired portfolio and purchases of the replacement securities at lower market rates.

Net unrealized gains on available-for-sale securities included in accumulated other comprehensive income, net of tax, as of September 30, 2015 and December 31, 2014 were $6.0 million and $2.9 million, respectively. Unrealized gains increased on available-for-sale securities due to a decrease in market rates from December 31, 2014. With approximately 38% of the investment portfolio in the held-to-maturity category, the recent volatility in interest rates does not have as much impact on other comprehensive income as would result if the entire portfolio were included in the category available-for-sale.

ESB’s total pre-merger investment portfolio of $1.0 billion was restructured through a specific security sale strategy with replacement purchases occurring after the merger to achieve specific overall portfolio characteristics as to weighted average life, duration and tax equivalent yield. The replacement purchases were not completed until June which accounted for approximately $0.8 million in potential interest income.

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WesBanco’s municipal portfolio comprises 34.0% of the overall securities portfolio as of September 30, 2015 as compared to 39.7% as of December 31, 2014, and it carries different risks that are not as prevalent in other security types contained in the portfolio. The following table presents the allocation of the municipal bond portfolio based on the combined S&P and Moody’s ratings of the individual bonds (at fair value):

TABLE 7. MUNICIPAL BOND RATINGS

	September 30, 2015				December 31, 2014
(unaudited, dollars in thousands)	Amount		% of Total		Amount		% of Total
Municipal bonds (at fair value) (1):
Moody’s: Aaa / S&P: AAA	$	82,742		9.4	$	50,205		8.1
Moody’s: Aa1 ; Aa2 ; Aa3 / S&P: AA+ ; AA ; AA-		654,325		74.3		449,219		72.1
Moody’s: A1 ; A2 ; A3 / S&P: A+ ; A ; A-		138,151		15.7		117,398		18.9
Moody’s: Baa1 ; Baa2 ; Baa3 / S&P: BBB+ ; BBB ; BBB- (2)		1,813		0.2		1,958		0.3
Not rated by either agency		3,724		0.4		3,454		0.6
Total municipal bond portfolio	$	880,755		100.0	$	622,234		100.0

(1) The highest available rating was used when placing the bond into a category in the table.

(2) As of September 30, 2015 and December 31, 2014, there are no securities in the municipal portfolio rated below investment grade.

WesBanco’s municipal bond portfolio consists of both taxable (primarily Build America Bonds) and tax-exempt general obligation and revenue bonds. The following table presents additional information regarding the municipal bond type and issuer (at fair value):

TABLE 8. COMPOSITION OF MUNICIPAL SECURITIES

	September 30, 2015				December 31, 2014
(unaudited, dollars in thousands)	Amount		% of Total		Amount		% of Total
Municipal bond type:
General Obligation	$	626,358		71.1	$	432,967		69.6
Revenue		254,397		28.9		189,267		30.4
Total municipal bond portfolio	$	880,755		100.0	$	622,234		100.0
Municipal bond issuer:
State Issued	$	78,502		8.9	$	53,931		8.7
Local Issued		802,253		91.1		568,303		91.3
Total municipal bond portfolio	$	880,755		100.0	$	622,234		100.0

The amortized cost of the municipal bond portfolio at September 30, 2015 and December 31, 2014 was $851.9 million and $594.0 million, respectively.

WesBanco’s municipal bond portfolio is broadly spread across the United States. The following table presents the top five states of municipal bond concentration based on total fair value at September 30, 2015:

TABLE 9. CONCENTRATION OF MUNICIPAL SECURITIES

	September 30, 2015
(unaudited, dollars in thousands)	Fair Value		% of Total
Pennsylvania	$	211,646		24.0
Texas		111,086		12.6
Ohio		95,806		10.9
Illinois		43,915		5.0
Kentucky		29,195		3.3
All other states (1)		389,107		44.2
Total municipal bond portfolio	$	880,755		100.0

(1) WesBanco’s municipal bond portfolio contains obligations in the state of West Virginia totaling $21.0 million or 2.4% of the total municipal portfolio.

WesBanco uses prices from independent pricing services and, to a lesser extent, indicative (non-binding) quotes from independent brokers, to measure the fair value of its securities. WesBanco validates prices received from pricing services or brokers using a variety of methods, including, but not limited to, comparison to secondary pricing services, corroboration of pricing by reference to other independent market data such as secondary broker quotes and relevant benchmark indices, review of pricing by personnel familiar with market liquidity and other market-related conditions, review of pricing service methodologies, review of independent auditor reports received from the pricing service regarding its internal controls, and through review of inputs and assumptions used in pricing certain securities thinly traded or with limited observable data points. The procedures in place provide management with a sufficient understanding of the valuation models, assumptions, inputs and pricing to reasonably measure the fair value of WesBanco’s securities. For additional disclosure relating to fair value measurements, refer to Note 7, “Fair Value Measurement” in the Consolidated Financial Statements.

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LOANS AND CREDIT RISK

Loans represent WesBanco’s single largest balance sheet asset classification and the largest source of interest income. Business purpose loans consist of commercial real estate (“CRE”) loans and other commercial and industrial (“C&I”) loans that are not secured by real estate. CRE loans are further segmented into land and construction loans, and loans for improved property. Consumer purpose loans consist of residential real estate loans, home equity lines of credit and other consumer loans. Loans held for sale generally consist of residential real estate loans originated for sale in the secondary market, but at times may also include other types of loans. The outstanding balance of each major category of the loan portfolio is summarized in Table 10.

The risk that borrowers will be unable or unwilling to repay their obligations and default on loans is inherent in all lending activities. Credit risk arises from many sources including general economic conditions, external events that impact businesses or industries, isolated events that impact a major employer, individual loss of employment or other personal hardships as well as changes in interest rates or the value of collateral. Credit risk is also impacted by a concentration of exposure within a geographic market or to one or more borrowers, industries or collateral types. The primary goal in managing credit risk is to minimize the impact of default by an individual borrower or group of borrowers. Credit risk is managed through the initial underwriting process as well as through ongoing monitoring and administration of the portfolio that varies by the type of loan. The Bank’s credit policies establish standard underwriting guidelines for each type of loan and require an appropriate evaluation of the credit characteristics of each borrower. This evaluation includes the borrower’s primary source of repayment capacity; the adequacy of collateral, if any, to secure the loan; the potential value of personal guarantees as secondary sources of repayment; and other factors unique to each loan that may increase or mitigate its risk. Credit bureau scores are also considered when evaluating consumer purpose loans as well as guarantors of business purpose loans. However, the Bank does not periodically update credit bureau scores subsequent to when loans are made to determine changes in credit history.

Credit risk is mitigated for all types of loans by continuously monitoring delinquency levels and pursuing collection efforts at the earliest stage of delinquency. The Bank also monitors general economic conditions, including employment, housing activity and real estate values in its market. The Bank also periodically evaluates and changes its underwriting standards when warranted based on market conditions, the historical performance of a category of the portfolio, or other external factors. Credit risk is also regularly evaluated for the impact of adverse economic and other events that increase the risk of default and the potential loss in the event of default to understand their impact on the Bank’s earnings and capital.

TABLE 10. COMPOSITION OF LOANS (1)

	September 30, 2015				December 31, 2014
(unaudited, dollars in thousands)	Amount		% of Loans		Amount		% of Loans
Commercial real estate:
Land and construction	$	326,754		6.6	$	262,643		6.4
Improved property		1,856,584		37.4		1,682,817		41.1
Total commercial real estate		2,183,338		44.0		1,945,460		47.5
Commercial and industrial		725,730		14.6		638,410		15.6
Residential real estate:
Land and construction		42,980		0.9		19,681		0.5
Other		1,200,650		24.2		909,089		22.2
Home equity		403,387		8.1		330,031		8.1
Consumer		394,557		8.0		244,095		6.0
Total portfolio loans		4,950,642		99.8		4,086,766		99.9
Loans held for sale		10,765		0.2		5,865		0.1
Total loans	$	4,961,407		100.0	$	4,092,631		100.0

(1) Loans are presented gross of the allowance for loan losses and net of unearned income, credit valuation adjustments, and unamortized net deferred loan fee income and loan origination costs.

Total loans increased $868.8 million compared to December 31, 2014 with $701.0 million from the ESB acquisition. Organic loan growth from December 31, 2014, annualized, was 5.3%, primarily achieved through $1.3 billion in loan originations for the first nine months of 2015 compared to $1.0 billion last year. Loan growth occurred in all major loan categories, with approximately 30.0% of the growth in the last twelve months in commercial and industrial loans. Loan growth was driven by increased business activity, additional commercial and residential lending personnel in our urban markets, focused marketing efforts, and continued improvement in loan origination processes and systems. Excluding the ESB acquisition, home equity and consumer loans provided 53.6% of organic growth, respectively increasing 14.5% and 16.2% from December 31, 2014, while CRE and C&I loans increased 1.7% and 4.7%, respectively. The increase in CRE loans was driven by an 18.1% increase in CRE land and construction lending.

Total loan commitments, including loans approved but not closed, increased $360.8 million from December 2014 with $85.3 million from the ESB acquisition and the remainder due primarily to increases in CRE land and construction and home equity lines of credit originations.

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NON-PERFORMING ASSETS, IMPAIRED LOANS AND LOANS PAST DUE 90 DAYS OR MORE

Non-performing assets consist of non-accrual loans and TDRs, other real estate acquired through or in lieu of foreclosure, bank premises held for sale, and repossessed automobiles acquired to satisfy defaulted consumer loans.

TABLE 11. NON-PERFORMING ASSETS

(unaudited, dollars in thousands)	September 30, 2015			December 31, 2014
Non-accrual loans:
Commercial real estate - land and construction	$	1,369		$	1,488
Commercial real estate - improved property		19,732			20,227
Commercial and industrial		7,591			4,110
Residential real estate		9,331			10,329
Home equity		2,643			1,923
Consumer		628			741
Total non-accrual loans (1)		41,294			38,818
TDRs accruing interest:
Commercial real estate - land and construction		950			—
Commercial real estate - improved property		2,012			2,437
Commercial and industrial		217			329
Residential real estate		7,717			8,215
Home equity		667			740
Consumer		467			345
Total TDRs accruing interest (1)		12,030			12,066
Total non-performing loans	$	53,324		$	50,884
Other real estate owned and repossessed assets		6,062			5,082
Total non-performing assets	$	59,386		$	55,966
Non-performing loans/total loans		1.08	%		1.25	%
Non-performing assets/total assets		0.70	%		0.89	%
Non-performing assets/total loans, other real estate and repossessed assets		1.20	%		1.37	%

(1) TDRs on nonaccrual of $12.7 million and $5.4 million at September 30, 2015 and December 31, 2014, respectively, are included in total nonaccrual loans.

Non-performing loans, which consist of non-accrual loans and TDRs, increased $2.4 million, or 4.8% from December 31, 2014 with $9.6 million remaining from the ESB acquisition, while legacy non-performing loans decreased $7.2 million or 14.2%. Non-performing loans acquired, recognized at their acquisition date fair value of $10.8 million with an unpaid principal balance of $16.1 million, primarily consist of three commercial relationships with an acquisition date aggregate fair value of $10.0 million. Organic non-performing loans decreased primarily from charge-downs, including a $1.2 million charge-down on a CRE property previously specifically reserved, unscheduled principal payments and the migration of certain loans to accrual status. Partially offsetting these decreases was an electronics manufacturing C&I credit added in the second quarter. (Please see the Notes to the Consolidated Financial Statements for additional discussion.)

Other real estate owned and repossessed assets increased $1.0 million from December 31, 2014 to September 30, 2015, primarily due to the ESB acquisition.

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The following table presents past due and accruing loans excluding accruing TDRs:

TABLE 12. PAST DUE AND ACCRUING LOANS EXCLUDING ACCRUING TDRs

(unaudited, dollars in thousands)	September 30, 2015			December 31, 2014
Loans past due 90 days or more:
Commercial real estate - land and construction	$	2,528		$	71
Commercial real estate - improved property		—			—
Commercial and industrial		769			22
Residential real estate		1,888			1,306
Home equity		516			570
Consumer		378			319
Total loans past due 90 days or more		6,079			2,288
Loans past due 30 to 89 days:
Commercial real estate - land and construction		—			—
Commercial real estate - improved property		2,197			480
Commercial and industrial		14			216
Residential real estate		3,704			3,105
Home equity		2,416			2,524
Consumer		4,091			3,022
Total loans past due 30 to 89 days		12,422			9,347
Total 30 days or more	$	18,501		$	11,635
Loans past due 90 days or more and accruing to total portfolio loans		0.12	%		0.06	%
Loans past due 30-89 days and accruing to total portfolio loans		0.25	%		0.23	%

Loans past due 30 days or more and accruing interest excluding TDRs increased $6.9 million from December 31, 2014 due to the ESB acquisition and from the migration of two land and construction credits to 90 days past due which are both well secured and in the process of collection. Loan delinquency as a percent of total loans was 0.37% at September 30, 2015 compared to 0.28% at December 31, 2014 and 0.34% at September 30, 2014. These loans continue to accrue interest because they are both well-secured and in the process of collection. Loans past due 30-89 days to total portfolio loans increased to 0.25% from 0.23% at December 31, 2014, and improved from 0.27% at September 30, 2014, while loans past due 90 days or more to total portfolio loans increased to 0.12% from 0.06% at December 31, 2014 and 0.08% one year ago. These relatively low delinquency levels are the result of management’s continued focus on controlling early stage delinquency in the current improved economic environment.

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ALLOWANCE FOR CREDIT LOSSES

Continued improvement in the credit quality of the pre-acquisition legacy portfolio resulted in a decrease in the allowance as supported by improvement in several credit quality metrics in the third quarter, despite an increase in net charge-offs, as non-performing, criticized and classified loans all decreased as a percentage of loans. The allowance was not affected by the acquired ESB loan portfolio, as these loans were recorded at fair value at the date of acquisition.

The allowance for credit losses decreased $2.9 million from December 31, 2014 to September 30, 2015 as a result of a lower provision expense than net charge-offs, and represents 0.84% of total loans at September 30, 2015 compared to 1.09% of total loans at December 31, 2014. However, if the acquired ESB loans (which were recorded at fair value at the date of acquisition) were excluded from the ratio, the allowance would approximate 0.98% of the adjusted loan total. The resulting ratio provides greater coverage over total loans and is considered by management to be a better comparison of the adequacy of the allowance from last year. Portfolio mix shifts also affect management’s evaluation of the overall allowance adequacy.

The allowance for loans individually evaluated decreased $1.1 million to $2.7 million from December 31, 2014 to September 30, 2015 primarily due to charge-offs and unscheduled principal payments which outpaced new specific reserves added during the period, while the allowance for loans collectively evaluated decreased $1.9 million to $39.0 million due to continued improvement in non-performing and classified and criticized loans.

The allowance for loan commitments of $0.6 million at September 30, 2015 increased $0.2 million from December 31, 2014 primarily due to the increase in overall commitments from December 31, 2014.

The allowance for credit losses by loan category, presented in Note 5 “Loans and the Allowance for Credit Losses” to the Consolidated Financial Statements, summarizes the impact of changes in various factors that affect the allowance for loan losses in each segment of the portfolio. The allowance for all segments is impacted by changes in loan balances, as well as changes in historical loss rates adjusted for qualitative factors such as economic conditions. The CRE and C&I segments of the portfolio are also impacted by changes in the risk grading distribution of the portfolio as well as the migration of CRE loans from land and construction to improved property upon the completion of construction.

The loss migration rate by internal risk grade is the primary factor for establishing the allowance for all commercial loans, and the portfolio segment loss history is the primary factor for establishing the allowance for residential real estate, home equity and consumer loans. The categorization of loans as non-performing is not as significant a factor as the loss migration rate by risk grade or the segment loss history, although certain non-performing loans that carry specific reserves are also typically considered classified under the internal risk grading system. Criticized and classified loans were $81.5 million or 1.65% of total loans at September 30, 2015, improving from 1.99% of total loans at December 31, 2014 and 2.17% of total loans from a year ago as credit quality continued to improve, enabling certain loans to be upgraded that were criticized but not classified throughout the economic downturn. Criticized and classified loans included $12.4 million from the ESB acquisition at September 30, 2015.

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Table 13 summarizes the allocation of the allowance for credit losses to each category of the loan portfolio. The decrease in the allowance for CRE land and construction loans is due primarily to that category of loans consisting of more multi-family apartment and other commercial building construction loans than land and residential development loans, which had higher loss rates during the recession but now represent a much smaller percentage of the category. The increase in the allowance for C&I and home equity loans is primarily attributable to growth in those categories, while the decrease in the allowance for residential real estate and consumer loans reflects lower historical loss rates in each category.

TABLE 13. ALLOCATION OF THE ALLOWANCE FOR CREDIT LOSSES

(unaudited, dollars in thousands)	September 30, 2015		% of Total		December 31, 2014		% of Total
Allowance for loan losses:
Commercial real estate - land and construction	$	4,829		11.4	$	5,654		12.5
Commercial real estate - improved property		15,247		36.1		17,573		39.0
Commercial and industrial		9,586		22.7		9,063		20.1
Residential real estate		4,697		11.1		5,382		11.9
Home equity		2,686		6.4		2,329		5.2
Consumer		4,000		9.5		4,078		9.0
Deposit account overdrafts		579		1.4		575		1.3
Total allowance for loan losses	$	41,624		98.5	$	44,654		99.0
Allowance for loan commitments:
Commercial real estate - land and construction	$	203		0.5	$	194		0.4
Commercial real estate - improved property		21		0.0		10		0.0
Commercial and industrial		249		0.6		112		0.3
Residential real estate		9		0.0		9		0.0
Home equity		109		0.3		90		0.2
Consumer		39		0.1		40		0.1
Total allowance for loan commitments		630		1.5		455		1.0
Total allowance for credit losses	$	42,254		100.0	$	45,109		100.0

Although the allowance for credit losses is allocated as described in Table 13, the total allowance is available to absorb actual losses in any category of the loan portfolio. However, differences between management’s estimation of probable losses and actual incurred losses in subsequent periods for any category may necessitate future adjustments to the provision for loan losses applicable to the category. Management believes the allowance for credit losses is appropriate to absorb probable losses at September 30, 2015.

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DEPOSITS

TABLE 14. DEPOSITS

(unaudited, dollars in thousands)	September 30, 2015		December 31, 2014		$ Change		% Change
Deposits
Non-interest bearing demand	$	1,280,329	$	1,061,075	$	219,254		20.7
Interest bearing demand		1,206,837		885,037		321,800		36.4
Money market		1,011,420		954,957		56,463		5.9
Savings deposits		1,064,426		842,818		221,608		26.3
Certificates of deposit		1,630,890		1,305,096		325,794		25.0
Total deposits	$	6,193,902	$	5,048,983	$	1,144,919		22.7

Deposits, which represent WesBanco’s primary source of funds, are offered in various account forms at various rates through WesBanco’s 141 branches. The FDIC insures deposits up to $250,000 per account.

Total deposits increased by $1.1 billion or 22.7% during the first nine months of 2015 due to the ESB acquisition, which provided $1.1 billion of additional deposits, while organic deposits were relatively unchanged from December 31, 2014. Interest bearing demand and non-interest bearing deposits increased 36.4% and 20.7%, respectively, while savings and money market deposits increased 26.3% and 5.9%, respectively, due to the ESB acquisition and corresponding marketing, incentive compensation paid to customers and employees, focused retail and business strategies to obtain more account relationships and customers’ preferences for shorter-term maturities. Deposit balances were also impacted by deposits from bonus and royalty payments from Marcellus and Utica shale gas energy companies in WesBanco’s southwestern Pennsylvania, eastern Ohio and northern West Virginia markets totaling $112.7 million and $181.0 million for the nine months ended September 30, 2015 and 2014, respectively. At September 30, 2015, demand deposits, savings deposits and money market deposits at former ESB branches were $396.9 million, $190.3 million and $32.2 million, respectively, compared to $373.3 million, $186.9 million and $37.6 million, respectively, at the date of acquisition.

Certificates of deposit increased $325.8 million due primarily to the ESB acquisition. Certificates of deposit remaining from the ESB acquisition totaled $497.6 million, while organic balances declined 13.2% and acquired balances declined 22.9% from the acquisition due to the effects of an overall corporate strategy designed to increase and remix retail deposit relationships with a focus on overall products that can be offered at a lower cost to the Bank. The decline is also impacted by lowered offered rates on maturing certificates of deposit and customer preferences for other non-maturity deposit types. WesBanco does not generally solicit brokered or other deposits out-of-market or over the internet, but does participate in the Certificate of Deposit Account Registry Services (CDARS^®) program and the Insured Cash Sweep (ICS^®) money market deposit program. CDARS^® balances totaled $245.2 million in total outstanding balances at September 30, 2015, of which $170.0 million represented one-way buys, compared to $283.0 million in total outstanding balances at December 31, 2014, of which $172.3 million represented one-way buys. ICS^® reciprocal balances totaled $177.3 million at September 30, 2015 compared to $117.1 million at December 31, 2014. Certificates of deposit greater than $250,000 were approximately $243.4 million at September 30, 2015 compared to $174.7 million at December 31, 2014. Certificates of deposit of $100,000 or more were approximately $813.4 million at September 30, 2015 compared to $706.1 million at December 31, 2014. The increase in jumbo certificates of deposit was primarily due to the acquisition. Certificates of deposit totaling approximately $973.4 million at September 30, 2015 with a cost of 0.61% are scheduled to mature within the next 12 months. WesBanco will continue to focus on its core deposit strategies and improving its overall mix of transaction accounts to total deposits, which includes offering special promotions on certain certificates of deposit maturities and savings products based on competition, sales strategies, liquidity needs and wholesale borrowing costs.

BORROWINGS

TABLE 15. BORROWINGS

(unaudited, dollars in thousands)	September 30, 2015		December 31, 2014		$ Change		% Change
Federal Home Loan Bank Borrowings	$	893,117	$	223,126	$	669,991		300.3
Other short-term borrowings		84,587		80,690		3,897		4.8
Junior subordinated debt owed to unconsolidated subsidiary trusts		106,196		106,176		20		0.0
Total	$	1,083,900	$	409,992	$	673,908		164.4

While borrowings are a less significant source of funding for WesBanco compared to total deposits, during the first nine months of 2015, FHLB borrowings increased $670.0 million. The acquisition of ESB provided $392.1 million in FHLB borrowings, and $277.9 million in new borrowings were utilized to manage WesBanco’s normal liquidity needs, including loan and investment funding, as well as CD runoff. A portion of the replacement investment securities were funded by the new FHLB borrowings.

Other short-term borrowings, which consist of securities sold under agreements to repurchase at September 30, 2015, but may also include federal funds purchased and other borrowings, were $84.6 million at September 30, 2015 compared to $80.7 million at December 31, 2014. The ESB acquisition also provided $36.1 million in junior subordinated debentures which were redeemed in May at a redemption price of 100% of the principal plus accrued and unpaid interest.

On September 2, 2015, WesBanco renewed a revolving line of credit, which is a senior obligation of the parent company, with another financial institution. This line of credit, which accrues interest at an adjusted LIBOR rate, includes a fee on the unused portion of the commitment and matures September 2, 2016, provides for aggregate unsecured borrowings of up to $25.0 million. There were no outstanding balances as of September 30, 2015 or December 31, 2014.

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OFF-BALANCE SHEET ARRANGEMENTS

WesBanco enters into financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit, letters of credit, loans approved but not closed, overdraft limits and contingent obligations to purchase loans funded by other entities. Since many of these commitments expire unused or partially used, these commitments may not reflect future cash requirements. Please refer to Note 9, “Commitments and Contingent Liabilities,” of the Consolidated Financial Statements and the “Loans and Credit Risk” section of this MD&A for additional information.

CAPITAL RESOURCES

Shareholders’ equity was $1.1 billion at September 30, 2015 compared to $788.2 million at December 31, 2014. The increase was due primarily to $293.6 million of common stock issued in the ESB acquisition coupled with net income during the current nine month period of $57.8 million and a $4.4 million increase in other comprehensive income, partially offset by the declaration of common shareholder dividends totaling $26.6 million for the nine months ended September 30, 2015. WesBanco also increased its quarterly dividend rate by $0.01 to $0.23 per share in February, representing a 4.5% increase over the prior quarterly rate and a cumulative 64% increase over the last seventeen quarters.

Regulatory guidelines require bank holding companies and commercial banks to maintain certain minimum capital ratios and define companies as “well capitalized” that sufficiently exceed the minimum ratios. At September 30, 2015, regulatory capital levels for both the Bank and WesBanco were substantially greater than the minimum amounts needed to be considered “well capitalized” under the regulations. There are various legal limitations under federal and state laws that limit the payment of dividends from the Bank to WesBanco. As of September 30, 2015, under FDIC regulations, WesBanco could receive, without prior regulatory approval, a dividend of approximately $42.5 million from the Bank. WesBanco intends to continue to improve its consolidated and Bank capital ratios to manage its growth strategies primarily from retaining a majority of its increasing earnings.

The following table summarizes risk-based capital amounts and ratios for WesBanco and the Bank for the periods indicated:

							September 30, 2015							December 31, 2014
(unaudited, dollars in thousands)	Minimum Value (1)			Well Capitalized  (2)			Amount		Ratio			Minimum Amount  (1)		Amount		Ratio			Minimum Amount  (1)
WesBanco, Inc.
Tier 1 leverage		4.00	%		5.00	%	$	744,668		9.39	%	$	317,157	$	593,031		9.88	%	$	240,068
Common equity tier 1 (3)		4.50	%		6.50	%		648,753		11.92	%		244,795		N/A		N/A			N/A
Tier 1 capital to risk-weighted assets		6.00	%		8.00	%		744,668		13.69	%		326,393		593,031		13.76	%		172,357
Total capital to risk-weighted assets		8.00	%		10.00	%		787,426		14.47	%		435,191		638,064		14.81	%		344,714
WesBanco Bank, Inc.
Tier 1 leverage		4.00	%		5.00	%	$	698,352		8.82	%	$	316,534	$	516,689		8.63	%	$	239,533
Common equity tier 1 (3)		4.50	%		6.50	%		698,352		12.87	%		244,175		N/A		N/A			N/A
Tier 1 capital to risk-weighted assets		6.00	%		8.00	%		698,352		12.87	%		325,566		516,689		12.04	%		171,612
Total capital to risk-weighted assets		8.00	%		10.00	%		740,821		13.65	%		434,088		561,369		13.08	%		343,225

(1) Minimum to remain adequately capitalized. Minimums prior to January 1, 2015 were 4.00% for Tier 1 leverage and Tier 1 capital and 8.00% for total capital.

(2) Well-capitalized under prompt corrective action regulations.

(3) The Common Equity Tier 1 ratio (known as “CET 1”) is a new regulatory ratio as of March 31, 2015, as the regulatory agencies adopted new guidelines for such ratio as a result of international adoption of the BASEL III regulatory capital accords in 2013.

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LIQUIDITY RISK

Liquidity is defined as a financial institution’s capacity to meet its cash and collateral obligations at a reasonable cost. Liquidity risk is the risk that an institution’s financial condition or overall safety and soundness is adversely affected by an inability, or perceived inability, to meet its obligations. An institution’s obligations, and the funding sources to meet them, depend significantly on its business mix, balance sheet structure, and the cash flows of its on- and off-balance sheet obligations. Institutions confront various internal and external situations that can give rise to increased liquidity risk including funding mismatches, market constraints on funding sources, contingent liquidity events, changes in economic conditions, and exposure to credit, market, operation, legal and reputation risk. WesBanco actively manages liquidity risk through its ability to provide adequate funds to meet changes in loan demand, unexpected outflows in deposits and other borrowings as well as to take advantage of market opportunities and meet operating cash needs. This is accomplished by maintaining liquid assets in the form of securities, sufficient borrowing capacity and a stable core deposit base. Liquidity is centrally monitored by WesBanco’s Asset/Liability Committee (“ALCO”).

WesBanco determines the degree of required liquidity by the relationship of total holdings of liquid assets to the possible need for funds to meet unexpected deposit losses and/or loan demands. The ability to quickly convert assets to cash at a minimal loss is a primary function of WesBanco’s investment portfolio management. WesBanco believes its cash flow from the loan portfolio, the investment portfolio, and other sources, adequately meet its liquidity requirements. WesBanco’s net loans to assets ratio was 58.1% at September 30, 2015 and deposit balances funded 73.3% of assets.

The following table lists the sources of liquidity from assets at September 30, 2015 expected within the next year:

(unaudited, in thousands)
Cash and cash equivalents	$	92,975
Securities with a maturity date within the next year		58,648
Projected payments and prepayments on mortgage-backed securities and collateralized mortgage obligations (1)		240,400
Callable securities		124,715
Loans held for sale		10,765
Accruing loans scheduled to mature		688,802
Normal loan repayments		642,439
Total sources of liquidity expected within the next year	$	1,858,744

(1) Projected prepayments are based on current prepayment speeds.

Deposit flows are another principal factor affecting overall WesBanco liquidity. Deposits totaled $6.2 billion at September 30, 2015. Deposit flows are impacted by current interest rates, products and rates offered by WesBanco versus various forms of competition, as well as customer behavior. Certificates of deposit scheduled to mature within one year totaled $973.4 million at September 30, 2015, which includes jumbo regular certificates of deposit totaling $364.1 million with a weighted-average cost of 0.63%, and jumbo CDARS^® deposits of $149.4 million with a cost of 0.59%.

WesBanco maintains a line of credit with the FHLB as an additional funding source. Available credit with the FHLB was approximately $1.2 billion and $1.5 billion at September 30, 2015 and December 31, 2014, respectively. At September 30, 2015, the Bank had unpledged available-for-sale securities with an amortized cost of $555.1 million, a portion of which is an available liquidity source, or such securities could be pledged to secure additional FHLB borrowings. The FHLB requires securities to be specifically pledged to the FHLB and maintained in a FHLB-approved custodial arrangement if the member wishes to include such securities in the maximum borrowing capacity calculation. WesBanco has elected not to specifically pledge to the FHLB otherwise unpledged securities.

WesBanco participates in the Federal Reserve Bank’s Borrower-in-Custody Program (“BIC”) whereby WesBanco pledges certain consumer loans as collateral for borrowings. At September 30, 2015, WesBanco had a BIC line of credit totaling $209.7 million, none of which was outstanding. Alternative funding sources may include the utilization of existing overnight lines of credit with third party banks totaling $225.0 million, none of which was outstanding at September 30, 2015, along with borrowings under repurchase agreement lines, increasing deposit rates to attract additional funds, accessing brokered deposits, or selling available-for-sale securities or certain types of loans.

Other short-term borrowings of $84.6 million at September 30, 2015 consisted of overnight sweep checking accounts for large commercial customers. There has not been a significant fluctuation in the average deposit balance of the overnight sweep checking accounts during the first nine months of 2015. The overnight sweep checking accounts require securities to be pledged equal to or greater than the average deposit balance in the related customer accounts.

        The principal sources of parent company liquidity are dividends from the Bank, $30.0 million in cash and investments on hand, and a $25.0 million revolving line of credit with another financial institution, which did not have an outstanding balance at September 30, 2015. WesBanco is in compliance with all loan covenants. There are various legal limitations under federal and state laws that limit the payment of dividends from the Bank to the parent company. As of September 30, 2015, under FDIC and State of West Virginia regulations, WesBanco could receive, without prior regulatory approval, dividends of approximately $42.5 million from the Bank. Management believes these are appropriate levels of cash for the parent company given the current environment. Management continuously monitors the adequacy of parent company cash levels and sources of liquidity through the use of metrics that relate current cash levels to historical and forecasted cash inflows and outflows.

WesBanco had outstanding commitments to extend credit in the ordinary course of business approximating $1.5 billion and $1.2 billion at September 30, 2015 and December 31, 2014, respectively. On a historical basis, only a small portion of these commitments will result in an outflow of funds. Please refer to Note 9, “Commitments and Contingent Liabilities,” of the Consolidated Financial Statements and the “Loans and Credit Risk” section of this MD&A for additional information.

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Federal financial regulatory agencies previously have issued guidance to provide for sound practices for managing funding and liquidity risk and strengthening liquidity risk management practices. WesBanco maintains a comprehensive management process for identifying, measuring, monitoring, and controlling liquidity risk which is fully integrated into its risk management process. Management believes WesBanco has sufficient current liquidity to meet current obligations to borrowers, depositors and others as of September 30, 2015 and that WesBanco’s current liquidity risk management policies and procedures adequately address this guidance.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The disclosures set forth in this item are qualified by the section captioned “Forward-Looking Statements” included in Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations of this report.

MARKET RISK

The primary objective of WesBanco’s ALCO is to maximize net interest income within established policy parameters. This objective is accomplished through the management of balance sheet composition, market risk exposures arising from changing economic conditions and liquidity risk.

Market risk is defined as the risk of loss due to adverse changes in the fair value of financial instruments resulting from fluctuations in interest rates and equity prices. Management considers interest rate risk to be WesBanco’s most significant market risk. Interest rate risk is the exposure to adverse changes in net interest income due to changes in interest rates. The relative consistency of WesBanco’s net interest income is largely dependent on effective management of interest rate risk. As interest rates change in the market, rates earned on interest rate sensitive assets and rates paid on interest rate sensitive liabilities do not necessarily move concurrently. Differing rate sensitivities may arise because fixed rate assets and liabilities may not have the same maturities, or because variable rate assets and liabilities differ in the timing and/or the percentage of rate changes.

WesBanco’s ALCO, comprised of senior management from various functional areas, monitors and manages interest rate risk within Board approved policy limits. Interest rate risk is monitored primarily through the use of an earnings simulation model. The model is highly dependent on various assumptions, which change regularly as the balance sheet and market interest rates change. The key assumptions and strategies employed are analyzed bi-monthly and reviewed and documented by the ALCO.

The earnings simulation model projects changes in net interest income resulting from the effect of changes in interest rates. Forecasting changes in net interest income requires management to make certain assumptions regarding loan and security prepayment rates, bond call dates, and adjustments to non-maturing deposit rates, which may not necessarily reflect the manner in which actual yields and costs respond to changes in market interest rates. Assumptions used are based primarily on historical experience and current market rates. Security portfolio maturities and prepayments are assumed to be reinvested in similar instruments and callable bond forecasts are adjusted at varying levels of interest rates. While management believes such assumptions to be reasonable, there can be no assurance that assumed prepayment rates, callable bond forecasts and non-maturing deposit rates will approximate actual future results. Moreover, the net interest income sensitivity chart presented in Table 1, “Net Interest Income Sensitivity,” assumes the composition of interest sensitive assets and liabilities existing at the end of the period remains constant over the period being measured and also assumes that a particular change in interest rates is reflected uniformly across the yield curve, regardless of the duration of the maturity or re-pricing of specific assets and liabilities. Since the assumptions used in the model relative to changes in interest rates are uncertain, the simulation analysis may not be indicative of actual results. In addition, the analysis may not consider all actions that management could employ in response to changes in interest rates and various earning asset and costing liability balances.

Management is aware of the significant effect inflation or deflation has upon interest rates and ultimately upon financial performance. WesBanco’s ability to cope with inflation or deflation is best determined by analyzing its capability to respond to changing market interest rates, as well as its ability to manage the various elements of non-interest income and expense during periods of increasing or decreasing inflation or deflation. WesBanco monitors the level and mix of interest-rate sensitive assets and liabilities through ALCO in order to reduce the impact of inflation or deflation on net interest income. Management also controls the effects of inflation or deflation by conducting periodic reviews of the prices and terms of its various products and services, both in terms of the costs to offer the services as well as outside market influences upon such pricing, by introducing new products and services or reducing the availability of existing products and services, and by controlling overhead expenses.

Interest rate risk policy limits are determined by measuring the anticipated change in net interest income over a twelve month period assuming an immediate and sustained 100, 200 and 300 basis point increase or decrease in market interest rates compared to a stable rate environment or base model. WesBanco’s current policy limits this exposure to a reduction of 5.0%, 12.5% and 25% or less, respectively, of net interest income from the base model over a twelve month period. The table below shows WesBanco’s interest rate sensitivity at September 30, 2015 and December 31, 2014 assuming a 100, 200 and 300 basis point interest rate increase, compared to a base model. Due to the current low interest rate environment, particularly for short-term rates, the 200 and 300 basis point decreasing change is not calculated.

TABLE 1. NET INTEREST INCOME SENSITIVITY

Immediate Change in Interest Rates	Percentage Change in Net Interest Income from Base over One Year		ALCO
(basis points)	September 30, 2015	December 31, 2014	Guidelines
+300	2.3%	0.9%	(25.0%)
+200	2.7%	2.1%	(12.5%)
+100	2.1%	1.9%	(5.0%)
-100	(2.7%)	(1.8%)	(5.0%)

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As per the table above, the earnings simulation model at September 30, 2015 currently projects that net interest income for the next twelve month period would decrease by 2.7% if interest rates were to fall immediately by 100 basis points, compared to a decrease of 1.8% for the same scenario as of December 31, 2014.

For rising rate scenarios, net interest income would increase by 2.1%, 2.7% and 2.3% if rates increased by 100, 200 and 300 basis points, respectively, as of September 30, 2015 compared to increases of 1.9%, 2.1% and 0.9% in a 100, 200 and 300 basis point increasing rate environment as of December 31, 2014.

The balance sheet is asset sensitive as of September 30, 2015, and slightly more so than at December 31, 2014, based upon changes in the mix of various earning assets and costing liabilities, 2015 loan and transaction deposit account growth, an increase in FHLB borrowings, the ESB transaction and certain changes in modeling assumptions. In the third quarter specifically, more FHLB short-term borrowings were extended to terms beyond one year maturities. Should rates rise more rapidly and by a higher amount than currently anticipated in the short to intermediate term, overall asset sensitivity may be somewhat neutralized due to slower anticipated prepayment speeds and extension risk associated with residential mortgages and mortgage-backed securities. In addition, variable rate commercial loans with rate floors averaging 4.16% approximated $1.0 billion at September 30, 2015, which represented approximately 36% of commercial loans. Approximately 61% or $634.1 million of these loans are currently priced at their floor. Therefore, in a 100 basis point rising rate environment, these loans would not as significantly re-price from their current floor level as compared to non-floor loans. Given the current lower interest rate environment and flatter yield curve affecting the repricing of loans and investments, WesBanco expects that the base case net interest margin may contract somewhat until sometime after rates begin to rise. A short-term rate increase is anticipated by the first quarter of 2016 by a majority of economists, as well as commentary from the Federal Reserve Board and its voting members, which should help the margin improve over time. Maturities and repricing of higher-costing certificates of deposit serve to mitigate compression from lower loan spreads and general loan re-pricing at lower spreads in the current competitive loan environment, along with anticipated loan growth in most loan categories. However, with current CDs costing an average of 0.62% in the third quarter, this factor is not expected to be as significant in the near term as it was over the past few years. Customers may elect to move maturing CD balances to lower costing transaction accounts such as MMDAs until rates begin to rise, which assists in lowering the cost of deposits in the short run, but may result in a portion of these balances moving back to more expensive CDs after rates begin to rise. Certificates of deposit totaling approximately $973.4 million mature within the next year at an average cost of 0.61%.

The Bank has significant additional borrowing capacity with the FHLB of Pittsburgh, the Federal Reserve Bank of Cleveland, and various correspondent banks, and may utilize these funding sources as necessary to lengthen liabilities, help offset mismatches in various asset maturities, and manage short-term cash needs. CDARS^® and ICS^® deposits also continue to be used to lengthen maturities in certificates of deposit, and for customers seeking higher yielding instruments and to maintain deposit balances below insured limits.

Current balance sheet strategies to reduce the potential for margin compression in the ongoing low rate environment include:

• increasing total loans; primarily commercial and residential with fixed rate periods of between 3-15 years, or variable to a published index;

• investing available short-term liquidity beyond current needs;

• continuing marketing programs to increase consumer loans and HELOCs, and transaction deposits versus certificates of deposit;

• remixing securities cash flows into new loans as demand warrants, or into other investments such as lower premium MBS, short-duration CMOs and 10-15 year tax-exempt municipal securities;

• extending term borrowings to balance asset/liability mismatches, and/or use derivatives to accomplish a similar purpose, and

• extending a portion of CD maturities through the CDARS^® program.

As an alternative to the immediate parallel rate shock analysis, the ALCO monitors interest rate risk by ramping or increasing interest rates 200 basis points gradually over a twelve month period. WesBanco’s current policy limits this exposure to 5.0% of net interest income from the base model for a twelve month period. Management believes that the ramping analysis reflects a more realistic movement of interest rates, whereas the immediate rate shock reflects a less likely scenario. The simulation model at September 30, 2015, using the 200 basis point increasing rate ramp analysis, projects that net interest income would increase 2.2% over the next twelve months, compared to a 1.9% increase at December 31, 2014. Finally, a “Most Likely” forecast scenario is constructed and reviewed at each ALCO meeting, which incorporates current budget or re-forecast assumptions into the model such as estimated loan and deposit growth, asset and liability remixing, competitive market rates for various products and marketing promotions, and other assumptions.

WesBanco periodically measures the economic value of equity, which is defined as the market value of tangible equity in various increasing and decreasing rate scenarios. At September 30, 2015, the market value of tangible equity as a percent of base in a 200 basis point rising rate environment indicates an increase of 2.0%, compared to an increase of 6.0% at December 31, 2014. In a 100 basis point falling rate environment, the model indicates a decrease of 6.9%, compared to a decrease of 11.0% as of December 31, 2014. WesBanco’s policy is to limit such change to minus 20% for a 200 basis point change in interest rates, as long as the Tier 1 leverage capital ratio is not forecasted to decrease below 5.0% as a result of the change. Balance sheet changes in loan and securities portfolios, new borrowings, transaction deposits and certificates of deposit, as well as certain other modeling assumptions, resulted in the change in equity market value from 2014.

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ITEM 4. CONTROLS AND PROCEDURES

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES— WesBanco’s Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”) have concluded that WesBanco’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended), based on their evaluation of these controls and procedures as of the end of the period covered by this Form 10-Q, are effective at the reasonable assurance level as discussed below to ensure that information required to be disclosed by WesBanco in the reports it files 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 WesBanco’s management, including its principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

LIMITATIONS ON THE EFFECTIVENESS OF CONTROLS— WesBanco’s management, including the CEO and CFO, does not expect that WesBanco’s disclosure controls and internal controls will prevent all errors and all fraud. While WesBanco’s disclosure controls and procedures are designed to provide reasonable assurance of achieving their objective, no control system, no matter how well conceived and operated, can provide 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 the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls.

CHANGES IN INTERNAL CONTROLS—There were no changes in WesBanco’s internal control over financial reporting that occurred during our fiscal quarter ended September 30, 2015 as required to be reported by paragraph (d) of Rules 13a-15 and 15d-15 under the Securities Exchange Act of 1934, that materially affected, or are reasonably likely to materially affect, WesBanco’s internal control over financial reporting.

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PART II – OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Litigation Related to the ESB Merger

On October 29, 2014, ESB and WesBanco entered into an Agreement and Plan of Merger (the “Merger Agreement”), providing for the merger of ESB with and into WesBanco, with WesBanco as the surviving corporation (the “Merger”). Each of ESB and WesBanco filed a definitive joint proxy statement/prospectus, dated as of December 11, 2014 (the “Joint Proxy Statement/Prospectus”), with the Securities and Exchange Commission in connection with the Merger. The Merger was consummated on February 10, 2015.

As previously reported by each of ESB and WesBanco on Current Reports on Form 8-K, each dated December 15, 2014 and filed on December 19, 2014, two putative class action complaints were filed by purported shareholders of ESB with respect to the Merger. One complaint was filed in the United States District Court for the Western District of Pennsylvania (the “Federal District Court”), and captioned and numbered James Elliott vs. ESB Financial, Inc., et al., Case No. 2:14-cv-01689-MRH (the “Federal Lawsuit”). The other complaint was filed in the Court of Common Pleas of Lawrence County, Pennsylvania, and captioned and numbered Randall Kress v. ESB Bank, Case No. 11185/14 CA (the “Lawrence County Lawsuit”). Both complaints alleged generally, among other things, that each member of ESB’s board of directors (the “Director Defendants”) breached their fiduciary duties in approving the Merger Agreement, that ESB and WesBanco aided and abetted such breaches of fiduciary duty and that the disclosure regarding the Merger contained in the Joint Proxy Statement/Prospectus was materially deficient.

On January 15, 2015, solely to avoid the costs, risks and uncertainties inherent in litigation, ESB, ESB Bank, WesBanco and the Director Defendants (ESB, ESB Bank, WesBanco and the Director Defendants, collectively the “Defendants”) entered into a Memorandum of Settlement (the “MOS”) with the respective plaintiffs (collectively, the “Plaintiffs”) regarding the settlement of both the Federal Lawsuit and the Lawrence County Lawsuit. Pursuant to the MOS, ESB and WesBanco agreed to file with the SEC and make publicly available to shareholders of ESB and WesBanco supplemental disclosures provided on Form 8-K and the Plaintiffs agreed to release ESB, ESB Bank, WesBanco and the Director Defendants from all claims related to the Merger Agreement and the Merger, subject to approval of the Federal District Court. The court approved the settlement contemplated in the MOS on September 21, 2015, and both the Federal Lawsuit and the Lawrence County Lawsuit were dismissed with prejudice, and all claims that were or could have been brought challenging any aspect of the Merger, the Merger Agreement, and any disclosure made in connection therewith were released and barred. ESB or its successor or insurer paid the fees and expenses awarded by the court. The parties prepared a stipulation of settlement which was entered into by the parties and filed with the court on April 28, 2015. By Order dated July 2, 2015, the Federal district Court made preliminary determinations regarding (i) certification of a class of ESB shareholders such that notice could be disseminated to class members relating to, among other things, the Federal Lawsuit, the Lawrence County Lawsuit, the settlement contemplated in the MOS (the “Settlement”), a final hearing to approve the Settlement and the right of class members to participate in such hearing, and (ii) the role of Mr. Elliott and his counsel as Class Representative and Class Counsel, respectively.

The settlement did not affect the timing of the special meeting of shareholders of ESB held January 22, 2015 in Ellwood City, Pennsylvania to vote upon a proposal to adopt the Merger Agreement. Similarly, the settlement did not affect the timing of the special meeting of shareholders of WesBanco held January 22, 2015 in Wheeling, West Virginia to vote on a proposal to approve the issuance of shares of WesBanco common stock in connection with the Merger. The shareholders of both corporations approved the Merger. ESB and the other Defendants denied all of the allegations in the lawsuits and believed the disclosures previously included in the Joint Proxy Statement/Prospectus were appropriate under the law. Nevertheless, ESB and the other Defendants agreed to settle the putative class action lawsuits in order to avoid the costs, disruptions and distraction of further litigation.

ESB and the other Defendants vigorously denied, and continue to vigorously deny, that they have committed or aided and abetted in the commission of any violation of law or engaged in any of the wrongful acts that were alleged in the lawsuits, and expressly maintain that, to the extent applicable, they diligently and scrupulously complied with their fiduciary and other legal burdens and entered into the MOS solely to eliminate the burden and expense of further litigation and to put the claims that were or could have been asserted to rest. Nothing in the MOS or any stipulation of settlement shall be deemed an admission of the legal necessity or materiality under applicable laws of any of the disclosures set forth therein.

Other Litigation

WesBanco is also involved in lawsuits, claims, investigations and proceedings which arise in the ordinary course of business. While any litigation contains an element of uncertainty, WesBanco does not believe that a material loss related to such proceedings or claims pending or known to be threatened is reasonably possible.

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

As of September 30, 2015, WesBanco had a current stock repurchase plan in which up to one million shares can be acquired. The plan was originally approved by the Board of Directors on March 21, 2007 and provides for shares to be repurchased for general corporate purposes, which may include a subsequent resource for potential acquisitions, shareholder dividend reinvestment and employee benefit plans. The timing, price and quantity of purchases are at the discretion of WesBanco, and the plan may be discontinued or suspended at any time. Repurchases during the third quarter of 2015 included those for the KSOP and dividend reinvestment plans and to facilitate the payment of withholding taxes for a former ESB employee’s stock compensation transaction.

52

On October 23, 2015 the Board of Directors approved a stock repurchase plan for up to an additional one million shares to also be acquired and with terms determined at the discretion of WesBanco, for general corporate purposes.

The following table presents the monthly share purchase activity during the quarter ended September 30, 2015:

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans		Maximum Number of Shares that May Yet Be Purchased Under the Plans
Balance at June 30, 2015								328,062
July 1, 2015 to July 31, 2015
Open market repurchases		—		—		—		328,062
Other transactions (1)		17,386	$	34.74		N/A		N/A
August 1, 2015 to August 31, 2015
Open market repurchases		—		—		—		328,062
Other transactions (1)		2,106	$	32.38		N/A		N/A
September 1, 2015 to September 30, 2015
Open market repurchases		—		—		—		328,062
Other repurchases (2)		13,878	$	30.79		13,878		314,184
Other transactions (1)		1,896		30.99		N/A		N/A
Third Quarter 2015
Open market repurchases		—		—		—		328,062
Other repurchases (2)		13,878	$	30.79		13,878		314,184
Other transactions (1)		21,388		34.17		N/A		N/A
Total		35,266	$	32.84		13,878		314,184

(1) Consists of open market purchases transacted in the KSOP and dividend reinvestment plans.

(2) Consists of shares purchased from a former ESB employee for the payment of withholding taxes to facilitate a stock compensation transaction.

53

ITEM 6. EXHIBITS

31.1	Certification of Chief Executive Officer of Periodic Report Pursuant to Rule 13a-15(e) or Rule 15d-15(e).
31.2	Certification of Chief Financial Officer of Periodic Report Pursuant to Rule 13a-15(e) or Rule 15d-15(e).
32.1	Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	The following materials from WesBanco’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2015, formatted in XBRL (Extensible Business Reporting Language): (i) the Consolidated Balance Sheets at September 30, 2015 and December 31, 2014, (ii) the Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2015 and 2014, (iii) the Consolidated Statements of Changes in Stockholders’ Equity for the nine months ended September 30, 2015 and 2014, (iv) the Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 and 2014, and (v) the Notes to Consolidated Financial Statements.

54

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.

	WESBANCO, INC.
Date: October 29, 2015	/s/ Todd F. Clossin
	Todd F. Clossin
	President and Chief Executive Officer (Principal Executive Officer)
Date: October 29, 2015	/s/ Robert H. Young
	Robert H. Young
	Executive Vice President and Chief Financial Officer (Principal Financial and Accounting Officer)

55

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

OF PERIODIC REPORT PURSUANT TO RULE 13a-15(e) or RULE 15d-15(e)

I, Todd F. Clossin, certify that:

1. I have reviewed this Report on Form 10-Q of WesBanco, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

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

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

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

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

5. The registrant’s other certifying officer(s) 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 similar 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: October 29, 2015	/s/ Todd F. Clossin
	Todd F. Clossin
	President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

OF PERIODIC REPORT PURSUANT TO RULE 13a-15(e) or RULE 15d-15(e)

I, Robert H. Young, certify that:

1. I have reviewed this Report on Form 10-Q of WesBanco, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

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

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

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

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

5. The registrant’s other certifying officer(s) 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 similar 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: October 29, 2015	/s/ Robert H. Young
	Robert H. Young
	Executive Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of WesBanco, Inc. on Form 10-Q as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned, in the capacity and on the date indicated below, hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

1. 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 operation of WesBanco, Inc.

Date: October 29, 2015	/s/ Todd F. Clossin
	Todd F. Clossin
	President and Chief Executive Officer

Date: October 29, 2015	/s/ Robert H. Young
	Robert H. Young
	Executive Vice President and Chief Financial Officer

The forgoing certifications are being furnished solely pursuant to Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code in accordance with Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, and shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Securities - Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Securities Gross Realized Gain Loss [Abstract]
Gross realized gains	$ 48	$ 602	$ 74	$ 967
Gross realized losses	(1)	(21)	(5)	(211)
Net realized gains (losses)	$ 47	$ 581	$ 69	$ 756

XML

Pension Plan - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost - benefits earned during year	$ 846	$ 734	$ 2,509	$ 2,176
Interest cost on projected benefit obligation	1,228	1,196	3,643	3,549
Expected return on plan assets	(1,950)	(1,822)	(5,785)	(5,407)
Amortization of prior service cost	7	11	19	33
Amortization of net loss	801	370	2,378	1,100
Net periodic pension cost	$ 932	$ 489	$ 2,764	$ 1,451

XML

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Past due loans excluded TDRs past due and accruing	90 days

XML

Pension Plan - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Compensation and Retirement Disclosure [Abstract]
Minimum required pension plan contribution	$ 3.1
Available credit balance utilized for minimum required contribution	34.9
Contribution of pension fund	$ 3.5

XML

Loans and the Allowance for Credit Losses - Summary of Commercial Loans by Risk Grade (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Summary of commercial loans by risk grade
Commercial loans	$ 2,909,068	$ 2,583,870
Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	2,827,611	2,502,731
Criticized - Compromised [Member]
Summary of commercial loans by risk grade
Commercial loans	32,253	34,288
Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	49,204	46,851
Commercial Real Estate - Land and Construction [Member]
Summary of commercial loans by risk grade
Commercial loans	326,754	262,643
Commercial Real Estate - Land and Construction [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	316,128	257,218
Commercial Real Estate - Land and Construction [Member] | Criticized - Compromised [Member]
Summary of commercial loans by risk grade
Commercial loans	8,170	3,645
Commercial Real Estate - Land and Construction [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	2,456	1,780
Commercial Real Estate - Improved Property [Member]
Summary of commercial loans by risk grade
Commercial loans	1,856,584	1,682,817
Commercial Real Estate - Improved Property [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	1,807,011	1,627,771
Commercial Real Estate - Improved Property [Member] | Criticized - Compromised [Member]
Summary of commercial loans by risk grade
Commercial loans	13,895	17,873
Commercial Real Estate - Improved Property [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	35,678	37,173
Commercial and Industrial [Member]
Summary of commercial loans by risk grade
Commercial loans	725,730	638,410
Commercial and Industrial [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	704,472	617,742
Commercial and Industrial [Member] | Criticized - Compromised [Member]
Summary of commercial loans by risk grade
Commercial loans	10,188	12,770
Commercial and Industrial [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	$ 11,070	$ 7,898

XML

Earnings Per Common Share - Summary of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator for both basic and diluted earnings per common share:
Net income	$ 22,248	$ 18,166	$ 57,760	$ 53,462
Denominator:
Total average basic common shares outstanding	38,523,593	29,280,648	37,144,783	29,235,364
Effect of dilutive stock options and warrant	33,402	80,232	59,331	81,550
Total diluted average common shares outstanding	38,556,995	29,360,880	37,204,114	29,316,914
Earnings per common share - basic	$ 0.58	$ 0.62	$ 1.55	$ 1.83
Earnings per common share - diluted	$ 0.58	$ 0.62	$ 1.55	$ 1.82

XML

Fair Value Measurement - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Fair Value Disclosures [Abstract]
Fair value transfer amount	$ 0	$ 0

XML

Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Components of Accumulated Other Comprehensive Income

The activity in accumulated other comprehensive income for the nine months ended September 30, 2015 and 2014 is as follows:

	Accumulated Other Comprehensive Income (1)
(unaudited, in thousands)	Defined Benefit Pension Plan			Unrealized Gains (Losses) on Securities Available-for-Sale			Unrealized Gains on Securities Transferred from Available-for- Sale to Held-to-Maturity			Total
Balance at December 31, 2014	$	(22,776	)	$	2,892		$	1,059		$	(18,825	)
Other comprehensive income before reclassifications		—			3,105			—			3,105
Amounts reclassified from accumulated other comprehensive income		1,493			(20	)		(199	)		1,274
Period change		1,493			3,085			(199	)		4,379
Balance at September 30, 2015	$	(21,283	)	$	5,977		$	860		$	(14,446	)
Balance at December 31, 2013	$	(7,966	)	$	(6,126	)	$	1,358		$	(12,734	)
Other comprehensive income before reclassifications		—			5,344			—			5,344
Amounts reclassified from accumulated other comprehensive income		716			(525	)		(224	)		(33	)
Period change		716			4,819			(224	)		5,311
Balance at September 30, 2014	$	(7,250	)	$	(1,307	)	$	1,134		$	(7,423	)

⁽¹⁾  All amounts are net of tax. Related income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 37%.

Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income

The following table provides details about amounts reclassified from accumulated other comprehensive income for the three and nine months ended September 30, 2015 and 2014:

Details about Accumulated Other Comprehensive Income Components	For the Three Months Ended September 30,						For the Nine Months Ended September 30,						Affected Line Item in the Statement of Net Income
(unaudited, in thousands)	2015			2014			2015			2014
Securities available-for-sale (1):
Net securities gains reclassified into earnings	$	(11	)	$	(583	)	$	(32	)	$	(831	)	Net securities gains (Non-interest income)
Related income tax expense		4			214			12			306		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		(7	)		(369	)		(20	)		(525	)
Securities held-to-maturity (1):
Amortization of unrealized gain transferred from available-for-sale		(104	)		(84	)		(317	)		(354	)	Interest and dividends on securities (Interest and dividend income)
Related income tax expense		38			31			118			130		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		(66	)		(53	)		(199	)		(224	)
Defined benefit pension plan (2):
Amortization of net loss and prior service costs		808			382			2,397			1,134		Employee benefits (Non-interest expense)
Related income tax benefit		(296	)		(140	)		(904	)		(418	)	Provision for income taxes
Net effect on accumulated other comprehensive income for the period		512			242			1,493			716
Total reclassifications for the period	$	439		$	(180	)	$	1,274		$	(33	)

⁽¹⁾ For additional detail related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income see Note 4, “Securities.”

⁽²⁾ Included in the computation of net periodic pension cost. See Note 6, “Pension Plan” for additional detail.

XML

Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Non-accrual loans	$ 41,294	$ 38,818
TDRs	24,691	17,486
Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	12,030	12,066
Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	12,661	5,420
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	1,369	1,488
TDRs	1,459	464
Commercial Real Estate - Land and Construction [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	950
Commercial Real Estate - Land and Construction [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	509	464
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	19,732	20,227
TDRs	11,627	4,287
Commercial Real Estate - Improved Property [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	2,012	2,437
Commercial Real Estate - Improved Property [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	9,615	1,850
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	7,591	4,110
TDRs	459	807
Commercial and Industrial [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	217	329
Commercial and Industrial [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	242	478
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	2,643	1,923
TDRs	938	985
Home Equity [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	667	740
Home Equity [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	271	245
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	21,101	21,715
TDRs	13,086	4,751
Commercial Real Estate [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	2,962	2,437
Commercial Real Estate [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	10,124	2,314
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	9,331	10,329
TDRs	9,543	10,289
Residential Real Estate [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	7,717	8,215
Residential Real Estate [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	1,826	2,074
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	628	741
TDRs	665	654
Consumer [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	467	345
Consumer [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	$ 198	$ 309

XML

Loans and the Allowance for Credit Losses - Schedule of Recorded Investment in Loans by Category (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 4,950,642	$ 4,086,766
Loans held for sale	10,765	5,865
Total loans	4,961,407	4,092,631
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	326,754	262,643
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	1,856,584	1,682,817
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	725,730	638,410
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	2,183,338	1,945,460
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	1,243,630	928,770
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	394,557	244,095
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 403,387	$ 330,031

XML

Securities - Schedule of Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	$ 57,063
Total available-for-sale securities, One to Five Years	108,211
Total available-for-sale securities, Five to Ten Years	86,387
Total available-for-sale securities, After Ten Years	46,806
Total available-for-sale securities, Mortgage-backed and Equity	1,261,251
Available-for-sale, Estimated Fair Value	1,559,718	$ 917,424
Total held-to-maturity securities, One Year or less	1,863
Total held-to-maturity securities, One to Five Years	35,169
Total held-to-maturity securities, Five to Ten Years	367,380
Total held-to-maturity securities, After Ten Years	415,600
Total held-to-maturity securities, Mortgage-backed and Equity	163,985
Held-to-maturity securities, Fair value	983,997	619,617
Total securities, One Year or less	58,926
Total securities, One to Five Years	143,380
Total securities, Five to Ten Years	453,767
Total securities, After Ten Years, Fair value	462,406
Total securities, Mortgage- backed and Equity	1,425,236
Total securities, Fair value	2,543,715	1,537,041
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, Mortgage-backed and Equity	1,250,448
Available-for-sale, Estimated Fair Value	1,250,448	701,113
Total held-to-maturity securities, Mortgage-backed and Equity	163,985
Held-to-maturity securities, Fair value	163,985	82,020
Obligations of State and Political Subdivisions [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	7,286
Total available-for-sale securities, One to Five Years	26,827
Total available-for-sale securities, Five to Ten Years	33,021
Total available-for-sale securities, After Ten Years	23,175
Available-for-sale, Estimated Fair Value	90,309	91,433
Total held-to-maturity securities, One Year or less	1,863
Total held-to-maturity securities, One to Five Years	34,159
Total held-to-maturity securities, Five to Ten Years	342,764
Total held-to-maturity securities, After Ten Years	411,660
Held-to-maturity securities, Fair value	790,446	530,801
Corporate Debt Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	49,777
Total available-for-sale securities, One to Five Years	61,384
Total available-for-sale securities, Five to Ten Years	14,251
Total available-for-sale securities, After Ten Years	1,937
Available-for-sale, Estimated Fair Value	127,349	25,996
Total held-to-maturity securities, One to Five Years	1,010
Total held-to-maturity securities, Five to Ten Years	24,616
Total held-to-maturity securities, After Ten Years	3,940
Held-to-maturity securities, Fair value	29,566	6,796
Obligations of Government Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One to Five Years	20,000
Total available-for-sale securities, Five to Ten Years	39,115
Total available-for-sale securities, After Ten Years	21,694
Available-for-sale, Estimated Fair Value	80,809	87,736
Equity Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, Mortgage-backed and Equity	10,803
Available-for-sale, Estimated Fair Value	$ 10,803	$ 11,146

XML

Loans and the Allowance for Credit Losses - TDRs Defaulted Later Restructured (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015 USD ($) Defaults	Sep. 30, 2015 USD ($) Defaults	Sep. 30, 2014 USD ($) Defaults
Financing Receivable, Modifications [Line Items]
Number of Defaults	1	2	1
Recorded Investment | $	$ 20	$ 62	$ 45
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults			1
Recorded Investment | $			$ 45
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	1	1
Recorded Investment | $	$ 20	$ 20
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults		1
Recorded Investment | $		$ 42

XML

Comprehensive Income - Components of Accumulated Other Comprehensive Income (Parenthetical) (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Percentage of Federal and State income tax rate	37.00%	37.00%

XML

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Current	$ 4,909,501	$ 4,042,825
Total Past Due	41,141	43,941
Total Loans	4,950,642	4,086,766
90 Days or More Past Due and Accruing	6,079	2,288
Loans held for sale, current	10,765	5,865
Loans held for sale	10,765	5,865
Total loans, current	4,920,266	4,048,690
Total loans	4,961,407	4,092,631
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	9,060	8,500
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	6,457	9,976
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	25,624	25,465
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	322,921	261,356
Total Past Due	3,833	1,287
Total Loans	326,754	262,643
90 Days or More Past Due and Accruing	2,528	71
Commercial Real Estate - Land and Construction [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due		20
Commercial Real Estate - Land and Construction [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	14
Commercial Real Estate - Land and Construction [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,819	1,267
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	1,844,067	1,665,363
Total Past Due	12,517	17,454
Total Loans	1,856,584	1,682,817
Commercial Real Estate - Improved Property [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,066	961
Commercial Real Estate - Improved Property [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,887	4,772
Commercial Real Estate - Improved Property [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	8,564	11,721
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	723,414	634,482
Total Past Due	2,316	3,928
Total Loans	725,730	638,410
90 Days or More Past Due and Accruing	769	22
Commercial and Industrial [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	79	1,834
Commercial and Industrial [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	178	240
Commercial and Industrial [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,059	1,854
Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	19,854	7,562
Total Past Due	21,440	31,256
Total Loans	41,294	38,818
Non-Accrual Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	855	2,884
Non-Accrual Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,530	5,552
Non-Accrual Loans [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	19,055	22,820
TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	10,830	11,016
Total Past Due	1,200	1,050
Total Loans	12,030	12,066
TDRs Accruing Interest [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	503	151
TDRs Accruing Interest [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	207	542
TDRs Accruing Interest [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	490	357
Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	30,684	18,578
Total Past Due	22,640	32,306
Total Loans	53,324	50,884
Total Impaired [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,358	3,035
Total Impaired [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,737	6,094
Total Impaired [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	19,545	23,177
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	2,166,988	1,926,719
Total Past Due	16,350	18,741
Total Loans	2,183,338	1,945,460
90 Days or More Past Due and Accruing	2,528	71
Commercial Real Estate [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,066	981
Commercial Real Estate [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,901	4,772
Commercial Real Estate [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	12,383	12,988
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	1,230,877	915,968
Total Past Due	12,753	12,802
Total Loans	1,243,630	928,770
90 Days or More Past Due and Accruing	1,888	1,306
Residential Real Estate [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,419	1,237
Residential Real Estate [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,031	3,384
Residential Real Estate [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	8,303	8,181
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	389,776	240,365
Total Past Due	4,781	3,730
Total Loans	394,557	244,095
90 Days or More Past Due and Accruing	378	319
Consumer [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,342	2,571
Consumer [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	971	685
Consumer [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	468	474
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	398,446	325,291
Total Past Due	4,941	4,740
Total Loans	403,387	330,031
90 Days or More Past Due and Accruing	516	570
Home Equity [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,154	1,877
Home Equity [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	376	895
Home Equity [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	$ 2,411	$ 1,968

XML

Mergers and Acquisitions

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Mergers and Acquisitions

NOTE 2. MERGERS AND ACQUISITIONS

On February 10, 2015, WesBanco completed its acquisition of ESB Financial Corporation (“ESB”), and its wholly-owned banking subsidiary, ESB Bank (“ESB Bank”), a Pennsylvania-chartered stock savings bank headquartered in Ellwood City, Pennsylvania. The transaction expanded WesBanco’s franchise in the Pittsburgh region of western Pennsylvania from 16 to 38 offices.

On the acquisition date, ESB had $1.9 billion in assets, excluding goodwill, which included $701.0 million in loans, and $486.9 million in securities. The ESB acquisition was valued at $339.0 million, based on WesBanco’s closing stock price on February 10, 2015 of $32.00, and resulted in WesBanco issuing 9,178,531 shares of its common stock and $45.0 million in cash and other assets in exchange for ESB common stock. The assets and liabilities of ESB were recorded on WesBanco’s balance sheet at their preliminary estimated fair values as of February 10, 2015, the acquisition date, and ESB’s results of operations have been included in WesBanco’s Consolidated Statements of Income since that date. ESB was merged into WesBanco and ESB Bank was merged into WesBanco Bank, Inc. (the “Bank”) on February 10, 2015. Based on a preliminary purchase price allocation, WesBanco recorded $169.7 million in goodwill and $5.3 million in core deposit intangibles in its community banking segment, representing the principal change in goodwill and intangibles from December 31, 2014. None of the goodwill is deductible for income tax purposes as the acquisition is accounted for as a tax-free exchange for tax purposes. As a result of the full integration of the operations of ESB, it is not practicable to determine the proforma results or revenue and net income included in WesBanco’s operating results relating to ESB since the date of acquisition because ESB has been fully integrated into WesBanco’s operations, and the operating results of ESB can therefore not be separately identified.

For the nine months ended September 30, 2015, WesBanco recorded merger-related expenses of $11.0 million associated with the ESB acquisition. In 2014 WesBanco recognized $1.3 million in merger-related expenses in connection with the ESB acquisition.

The purchase price of the ESB acquisition and resulting goodwill is summarized as follows:

(unaudited, in thousands)	February 10, 2015
Purchase Price:
Fair value of WesBanco shares issued, (net of equity issuance costs of $0.1 million)	$	293,933
Cash consideration for outstanding ESB shares, options and restricted stock		37,036
Settlement of pre-existing loan to ESB		8,000
Total purchase price	$	338,969
Fair value of:
Tangible assets acquired	$	1,858,014
Core deposit and other intangible assets acquired		5,346
Liabilities assumed		(1,702,554	)
Net cash received in the acquisition		8,485
Fair value of net assets acquired		169,291
Goodwill recognized	$	169,678

The following table presents the preliminary allocation of the purchase price of the assets acquired and the liabilities assumed at the date of acquisition, as WesBanco intends to finalize its accounting for the acquisition of ESB during 2015:

(unaudited, in thousands)	February 10, 2015
Assets
Cash and due from banks	$	8,485
Securities		486,891
Loans		700,964
Goodwill and other intangible assets		175,023
Accrued income and other assets (1)		670,160
Total Assets	$	2,041,523
Liabilities
Deposits	$	1,246,992
Borrowings		433,454
Accrued expenses and other liabilities		22,108
Total liabilities		1,702,554
Purchase price	$	338,969

⁽¹⁾ Includes receivables of $560.7 million from the sale of available-for-sale securities prior to the acquisition date.

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Comprehensive Income - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net effect on accumulated other comprehensive income for the period			$ (3,085)	$ (4,819)
Defined benefit pension plan (2):
Total reclassifications for the period			(1,274)	33
Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net securities gains reclassified into earnings	$ (11)	$ (583)	(32)	(831)
Related income tax expense	4	214	12	306
Net effect on accumulated other comprehensive income for the period	(7)	(369)	(20)	(525)
Amortization of unrealized gain transferred from available-for-sale	(104)	(84)	(317)	(354)
Related income tax expense	38	31	118	130
Net effect on accumulated other comprehensive income for the period	(66)	(53)	(199)	(224)
Defined benefit pension plan (2):
Amortization of net loss and prior service costs	808	382	2,397	1,134
Related income tax benefit	(296)	(140)	(904)	(418)
Net effect on accumulated other comprehensive income for the period	512	242	1,493	716
Total reclassifications for the period	$ 439	$ (180)	$ 1,274	$ (33)

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Loans and the Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			$ 44,654	$ 47,368
Allowance for loan commitments, beginning balance			455	602
Total beginning allowance for credit losses			45,109	47,970
Provision for loan losses			5,593	4,595
Provision for loan commitments			175	(69)
Total provision for credit losses	$ 1,798	$ 1,478	5,768	4,526
Charge-offs			(11,415)	(9,847)
Recoveries			2,792	2,913
Net charge-offs			(8,623)	(6,934)
Allowance for loan losses, ending balance	41,624	45,029	41,624	45,029
Allowance for loan commitments, ending balance	630	533	630	533
Total ending allowance for credit losses	42,254	45,562	42,254	45,562
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			5,654	6,056
Allowance for loan commitments, beginning balance			194	301
Total beginning allowance for credit losses			5,848	6,357
Provision for loan losses			(826)	(812)
Provision for loan commitments			9	(35)
Total provision for credit losses			(817)	(847)
Recoveries			1
Net charge-offs			1
Allowance for loan losses, ending balance	4,829	5,244	4,829	5,244
Allowance for loan commitments, ending balance	203	266	203	266
Total ending allowance for credit losses	5,032	5,510	5,032	5,510
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			17,573	18,157
Allowance for loan commitments, beginning balance			10	62
Total beginning allowance for credit losses			17,583	18,219
Provision for loan losses			977	(403)
Provision for loan commitments			11	(42)
Total provision for credit losses			988	(445)
Charge-offs			(3,964)	(1,696)
Recoveries			661	457
Net charge-offs			(3,303)	(1,239)
Allowance for loan losses, ending balance	15,247	16,515	15,247	16,515
Allowance for loan commitments, ending balance	21	20	21	20
Total ending allowance for credit losses	15,268	16,535	15,268	16,535
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			9,063	9,925
Allowance for loan commitments, beginning balance			112	130
Total beginning allowance for credit losses			9,175	10,055
Provision for loan losses			2,434	1,357
Provision for loan commitments			137	(6)
Total provision for credit losses			2,571	1,351
Charge-offs			(2,267)	(2,632)
Recoveries			356	1,058
Net charge-offs			(1,911)	(1,574)
Allowance for loan losses, ending balance	9,586	9,708	9,586	9,708
Allowance for loan commitments, ending balance	249	124	249	124
Total ending allowance for credit losses	9,835	9,832	9,835	9,832
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			575	520
Total beginning allowance for credit losses			575	520
Provision for loan losses			441	660
Total provision for credit losses			441	660
Charge-offs			(610)	(577)
Recoveries			173	183
Net charge-offs			(437)	(394)
Allowance for loan losses, ending balance	579	786	579	786
Total ending allowance for credit losses	579	786	579	786
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			5,382	5,673
Allowance for loan commitments, beginning balance			9	5
Total beginning allowance for credit losses			5,391	5,678
Provision for loan losses			325	1,867
Provision for loan commitments				1
Total provision for credit losses			325	1,868
Charge-offs			(1,482)	(2,025)
Recoveries			472	339
Net charge-offs			(1,010)	(1,686)
Allowance for loan losses, ending balance	4,697	5,854	4,697	5,854
Allowance for loan commitments, ending balance	9	6	9	6
Total ending allowance for credit losses	4,706	5,860	4,706	5,860
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			4,078	5,020
Allowance for loan commitments, beginning balance			40	19
Total beginning allowance for credit losses			4,118	5,039
Provision for loan losses			922	1,066
Provision for loan commitments			(1)	1
Total provision for credit losses			921	1,067
Charge-offs			(1,968)	(2,326)
Recoveries			968	782
Net charge-offs			(1,000)	(1,544)
Allowance for loan losses, ending balance	4,000	4,542	4,000	4,542
Allowance for loan commitments, ending balance	39	20	39	20
Total ending allowance for credit losses	4,039	4,562	4,039	4,562
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			2,329	2,017
Allowance for loan commitments, beginning balance			90	85
Total beginning allowance for credit losses			2,419	2,102
Provision for loan losses			1,320	860
Provision for loan commitments			19	12
Total provision for credit losses			1,339	872
Charge-offs			(1,124)	(591)
Recoveries			161	94
Net charge-offs			(963)	(497)
Allowance for loan losses, ending balance	2,686	2,380	2,686	2,380
Allowance for loan commitments, ending balance	109	97	109	97
Total ending allowance for credit losses	$ 2,795	$ 2,477	$ 2,795	$ 2,477

XML

Mergers and Acquisitions - Calculation of Purchase Price and Resulting Goodwill Relating to ESB Acquisition (Detail) - ESB Financial Corporation [Member] $ in Thousands	Feb. 10, 2015 USD ($)
Purchase Price:
Fair value of WesBanco shares issued, (net of equity issuance costs of $0.1 million)	$ 293,933
Cash consideration for outstanding ESB shares, options and restricted stock	37,036
Settlement of pre-existing loan to ESB	8,000
Total purchase price	338,969
Fair value of:
Tangible assets acquired	1,858,014
Core deposit and other intangible assets acquired	5,346
Liabilities assumed	(1,702,554)
Net cash received in the acquisition	8,485
Fair value of net assets acquired	169,291
Goodwill recognized	$ 169,678

XML

Mergers and Acquisitions - Additional Information (Detail) $ / shares in Units, $ in Thousands		9 Months Ended	12 Months Ended
	Feb. 10, 2015 USD ($) Office $ / shares shares	Sep. 30, 2015 USD ($) shares	Dec. 31, 2014 USD ($)	Feb. 09, 2015 Office
Business Acquisition [Line Items]
Loans		$ 701,000
ESB Financial Corporation [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,900,000
Loans	700,964
Securities	486,891
Value of acquisition	$ 338,969
Common shares issued | shares	9,178,531
Cash consideration for outstanding shares	$ 45,000
Purchase price allocation, goodwill	169,678
Purchase price allocation in core deposit intangible	$ 5,346
Closing stock price | $ / shares	$ 32.00
Merger related expense		$ 11,000	$ 1,300
Pennsylvania [Member]
Business Acquisition [Line Items]
Number of offices | Office	38			16
Common Stock [Member]
Business Acquisition [Line Items]
Common shares issued | shares		9,178,531
Common Stock [Member] | ESB Financial Corporation [Member]
Business Acquisition [Line Items]
Common shares issued | shares	9,178,531

XML

Fair Value Measurement - Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	$ 1,559,718	$ 917,424
Other real estate owned and repossessed assets	6,062	5,082
Loans held for sale	10,765	5,865
Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	1,559,718	917,424
Total recurring fair value measurements	1,559,718	917,424
Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,744	6,024
Other real estate owned and repossessed assets	6,062	5,082
Loans held for sale	10,765	5,865
Total nonrecurring fair value measurements	23,571	16,971
Obligations of Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	80,809	87,736
Obligations of Government Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	80,809	87,736
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	1,250,448	701,113
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	1,250,448	701,113
Obligations of State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	90,309	91,433
Obligations of State and Political Subdivisions [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	90,309	91,433
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	127,349	25,996
Corporate Debt Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	127,349	25,996
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	10,803	11,146
Equity Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	10,803	11,146
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	7,844	8,440
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	7,844	8,440
Total recurring fair value measurements	7,844	8,440
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	7,844	8,440
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	1,551,874	908,984
Loans held for sale	10,765	5,865
Significant Other Observable Inputs (Level 2) [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	1,551,874	908,984
Total recurring fair value measurements	1,551,874	908,984
Significant Other Observable Inputs (Level 2) [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	10,765	5,865
Total nonrecurring fair value measurements	10,765	5,865
Significant Other Observable Inputs (Level 2) [Member] | Obligations of Government Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	80,809	87,736
Significant Other Observable Inputs (Level 2) [Member] | Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	1,250,448	701,113
Significant Other Observable Inputs (Level 2) [Member] | Obligations of State and Political Subdivisions [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	90,309	91,433
Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	127,349	25,996
Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	2,959	2,706
Significant Unobservable Inputs (Level 3) [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,744	6,024
Other real estate owned and repossessed assets	6,062	5,082
Total nonrecurring fair value measurements	$ 12,806	$ 11,106

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Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	$ 2,650	$ 3,798
Allowance for loans collectively evaluated for impairment	38,974	40,856
Allowance for loan commitments	630	455	$ 533	$ 602
Total allowance for credit losses	42,254	45,109	45,562	47,970
Individually evaluated for impairment	18,225	14,313
Collectively evaluated for impairment	4,932,417	4,072,453
Total Loans	4,950,642	4,086,766
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	4,829	5,654
Allowance for loan commitments	203	194	266	301
Total allowance for credit losses	5,032	5,848	5,510	6,357
Individually evaluated for impairment	873
Collectively evaluated for impairment	325,881	262,643
Total Loans	326,754	262,643
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	1,152	2,765
Allowance for loans collectively evaluated for impairment	14,095	14,808
Allowance for loan commitments	21	10	20	62
Total allowance for credit losses	15,268	17,583	16,535	18,219
Individually evaluated for impairment	12,468	11,469
Collectively evaluated for impairment	1,844,116	1,671,348
Total Loans	1,856,584	1,682,817
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	1,498	1,033
Allowance for loans collectively evaluated for impairment	8,088	8,030
Allowance for loan commitments	249	112	124	130
Total allowance for credit losses	9,835	9,175	9,832	10,055
Individually evaluated for impairment	4,884	2,844
Collectively evaluated for impairment	720,846	635,566
Total Loans	725,730	638,410
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	579	575
Total allowance for credit losses	579	575	786	520
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	4,697	5,382
Allowance for loan commitments	9	9	6	5
Total allowance for credit losses	4,706	5,391	5,860	5,678
Collectively evaluated for impairment	1,243,630	928,770
Total Loans	1,243,630	928,770
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	4,000	4,078
Allowance for loan commitments	39	40	20	19
Total allowance for credit losses	4,039	4,118	4,562	5,039
Collectively evaluated for impairment	394,557	244,095
Total Loans	394,557	244,095
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	2,686	2,329
Allowance for loan commitments	109	90	97	85
Total allowance for credit losses	2,795	2,419	$ 2,477	$ 2,102
Collectively evaluated for impairment	403,387	330,031
Total Loans	$ 403,387	$ 330,031

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Mergers and Acquisitions - Calculation of Purchase Price and Resulting Goodwill Relating to ESB Acquisition (Parenthetical) (Detail) $ in Millions	Feb. 10, 2015 USD ($)
ESB Financial Corporation [Member]
Business Acquisition [Line Items]
Equity issuance costs	$ 0.1

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Mergers and Acquisitions - Summary of Fair Value of Net Assets that Wesbanco Acquired from ESB (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Feb. 10, 2015
Assets
Loans	$ 701,000
ESB Financial Corporation [Member]
Assets
Cash and due from banks		$ 8,485
Securities		486,891
Loans		700,964
Goodwill and other intangible assets		175,023
Accrued income and other assets		670,160
Total Assets		2,041,523
Liabilities
Deposits		1,246,992
Borrowings		433,454
Accrued expenses and other liabilities		22,108
Total liabilities		1,702,554
Purchase price		$ 338,969

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of presentation — The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2014.

WesBanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2014 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly WesBanco’s financial position and results of operations for each of the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.

Recent accounting pronouncements — In September 2015, the Financial Accounting Standards Board (the “FASB”) issued an Accounting Standards Update (“ASU”) (ASU 2015-16) that eliminates the requirement that an acquirer in a business combination account for measurement-period adjustments retrospectively. Instead, acquirers must recognize measurement-period adjustments during the period in which they determine the amounts, including the effect on earnings of any amounts they would have recorded in previous periods if the accounting had been completed at the acquisition date. The acquirer still must disclose the amounts and reasons for adjustments to the provisional amounts. The acquirer also must disclose, by line item, the amount of the adjustment reflected in the current-period income statement that would have been recognized in previous periods if the adjustment to provisional amounts had been recognized as of the acquisition date. Alternatively, an acquirer may present those amounts separately on the face of the income statement. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2015, including interim periods with those fiscal years. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

In May 2015, the FASB issued ASU 2015-07 related to disclosures for investments in certain entities that calculate net asset value (NAV) per share (or its equivalent). This update removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient and modifies certain disclosure requirements. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2015, and requires retrospective adoption. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

In April 2015, the FASB issued ASU 2015-05 that provides guidance on when to account for a cloud computing arrangement as a software license. The guidance applies only to internal-use software that a customer obtains access to in a hosting arrangement if both of the following criteria are met: (1) The customer has the contractual right to take possession of the software at any time during the hosting period without significant penalty, (2) it is feasible for the customer to either run the software on its own hardware or contract with another party unrelated to the vendor to host the software. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

In February 2015, the FASB issued ASU 2015-02 that revised the consolidation model, requiring reporting entities to reevaluate whether they should consolidate certain legal entities under the revised model. The amendments in this update modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities, and eliminate the presumption that a general partner should consolidate and affect the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The pronouncement also provides for a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements similar to those in Rule 2a-7 of the Investment Company Act of 1940 for registered money market funds. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

        In August 2014, the FASB issued ASU 2014-14 related to the classification of certain government-guaranteed mortgage loans upon foreclosure. The amendments in this update require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the following conditions are met: (1) The loan has a government guarantee that is not separable from the loan before foreclosure, (2) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim, (3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based upon the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The pronouncement is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014 and may be adopted under either a modified retrospective transition method or a prospective transition method. However, the same method of transition as elected under ASU 2014-04 must be applied. While early adoption was permitted, WesBanco elected to adopt the ASU in the first quarter of 2015, which was the first interim period after December 31, 2014. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In June 2014, the FASB issued ASU 2014-11 related to repurchase-to-maturity transactions, repurchase financing and disclosures. The pronouncement changes the accounting for repurchase-to-maturity transactions and linked repurchase financings to secured borrowing accounting, which is consistent with the accounting for other repurchase agreements. The pronouncement also requires two new disclosures. The first disclosure requires an entity to disclose information on transfers accounted for as sales in transactions that are economically similar to repurchase agreements. The second disclosure provides increased transparency about the types of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The pronouncement is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. WesBanco adopted the ASU in the first quarter of 2015. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In May 2014, the FASB issued ASU 2014-09 related to the recognition of revenue from contracts with customers. The new revenue pronouncement creates a single source of revenue guidance for all companies in all industries and is more principles-based than current revenue guidance. The pronouncement provides a five-step model for a company to recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The five steps are, (1) identify the contract with the customer, (2) identify the separate performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the separate performance obligations and (5) recognize revenue when each performance obligation is satisfied. The pronouncement was originally effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2016 using either a full retrospective approach for all periods presented in the period of adoption or a modified retrospective approach. Early adoption is not permitted. On July 9, 2015, the FASB approved a one-year deferral of the effective date of the update. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is now permitted as of the original effective date for interim and annual reporting periods in fiscal years beginning after December 15, 2016. WesBanco is currently evaluating the impact of the adoption of this pronouncement on its Consolidated Financial Statements.

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Mergers and Acquisitions - Summary of Fair Value of Net Assets that Wesbanco Acquired from ESB (Parenthetical) (Detail) $ in Millions	Sep. 30, 2015 USD ($)
ESB Financial Corporation [Member]
Business Acquisition [Line Items]
Receivables from sale of available-for-sale securities	$ 560.7

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Securities - Schedule of Unrealized Losses on Investment Securities (Detail) $ in Thousands	Sep. 30, 2015 USD ($) Security	Dec. 31, 2014 USD ($) Security
Obligations of Government Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 12,986	$ 19,362
Less than 12 months, Unrealized Losses	$ (14)	$ (77)
Less than 12 months, Number of Securities | Security	2	5
12 months or more, Fair Value		$ 19,757
12 months or more, Unrealized Losses		$ (238)
12 months or more, Number of Securities | Security		4
Fair Value, Total	$ 12,986	$ 39,119
Unrealized Losses, Total	$ (14)	$ (315)
Number of Securities Total | Security	2	9
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 430,580	$ 78,786
Less than 12 months, Unrealized Losses	$ (1,753)	$ (386)
Less than 12 months, Number of Securities | Security	73	19
12 months or more, Fair Value	$ 145,652	$ 240,055
12 months or more, Unrealized Losses	$ (2,981)	$ (6,618)
12 months or more, Number of Securities | Security	31	43
Fair Value, Total	$ 576,232	$ 318,841
Unrealized Losses, Total	$ (4,734)	$ (7,004)
Number of Securities Total | Security	104	62
Obligations of State and Political Subdivisions [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 120,249	$ 12,615
Less than 12 months, Unrealized Losses	$ (941)	$ (96)
Less than 12 months, Number of Securities | Security	166	15
12 months or more, Fair Value	$ 20,601	$ 61,548
12 months or more, Unrealized Losses	$ (439)	$ (952)
12 months or more, Number of Securities | Security	30	93
Fair Value, Total	$ 140,850	$ 74,163
Unrealized Losses, Total	$ (1,380)	$ (1,048)
Number of Securities Total | Security	196	108
Corporate Debt Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 71,958	$ 2,969
Less than 12 months, Unrealized Losses	$ (172)	$ (31)
Less than 12 months, Number of Securities | Security	22	1
12 months or more, Fair Value	$ 1,937	$ 4,573
12 months or more, Unrealized Losses	$ (49)	$ (137)
12 months or more, Number of Securities | Security	1	2
Fair Value, Total	$ 73,895	$ 7,542
Unrealized Losses, Total	$ (221)	$ (168)
Number of Securities Total | Security	23	3
Total Temporarily Impaired Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 635,773	$ 113,732
Less than 12 months, Unrealized Losses	$ (2,880)	$ (590)
Less than 12 months, Number of Securities | Security	263	40
12 months or more, Fair Value	$ 168,190	$ 325,933
12 months or more, Unrealized Losses	$ (3,469)	$ (7,945)
12 months or more, Number of Securities | Security	62	142
Fair Value, Total	$ 803,963	$ 439,665
Unrealized Losses, Total	$ (6,349)	$ (8,535)
Number of Securities Total | Security	325	182

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Loans and the Allowance for Credit Losses - Summary of Other Real Estate Owned and Repossessed Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Receivables [Abstract]
Other real estate owned	$ 5,967	$ 4,920
Repossessed assets	95	162
Total other real estate owned and repossessed assets	$ 6,062	$ 5,082

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Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks, including interest bearing amounts of $2,144 and $8,405, respectively	$ 92,975	$ 94,002
Securities:
Available-for-sale, at fair value	1,559,718	917,424
Held-to-maturity (fair values of $983,997 and $619,617, respectively)	957,352	593,670
Total securities	2,517,070	1,511,094
Loans held for sale	10,765	5,865
Portfolio loans, net of unearned income	4,950,642	4,086,766
Allowance for loan losses	(41,624)	(44,654)
Net portfolio loans	4,909,018	4,042,112
Premises and equipment, net	111,699	93,135
Accrued interest receivable	27,000	18,481
Goodwill and other intangible assets, net	492,725	319,506
Bank-owned life insurance	155,894	123,298
Other assets	135,284	89,072
Total Assets	8,452,430	6,296,565
Deposits:
Non-interest bearing demand	1,280,329	1,061,075
Interest bearing demand	1,206,837	885,037
Money market	1,011,420	954,957
Savings deposits	1,064,426	842,818
Certificates of deposit	1,630,890	1,305,096
Total deposits	6,193,902	5,048,983
Federal Home Loan Bank borrowings	893,117	223,126
Other short-term borrowings	84,587	80,690
Junior subordinated debt owed to unconsolidated subsidiary trusts	106,196	106,176
Total borrowings	1,083,900	409,992
Accrued interest payable	2,832	1,620
Other liabilities	56,054	47,780
Total Liabilities	$ 7,336,688	$ 5,508,375
SHAREHOLDERS' EQUITY
Preferred stock, no par value; 1,000,000 shares authorized; none outstanding
Common stock, $2.0833 par value; 100,000,000 and 50,000,000 shares authorized in 2015 and 2014, respectively; 38,546,042and 29,367,511 issued in 2015 and 2014, respectively; outstanding: 38,517,542 and 29,298,188 shares in 2015 and 2014, respectively	$ 80,304	$ 61,182
Capital surplus	515,783	244,661
Retained earnings	535,777	504,578
Treasury stock (28,550 and 69,323 shares in 2015 and 2014, respectively, at cost)	(890)	(2,151)
Accumulated other comprehensive loss	(14,446)	(18,825)
Deferred benefits for directors	(786)	(1,255)
Total Shareholders' Equity	1,115,742	788,190
Total Liabilities and Shareholders' Equity	$ 8,452,430	$ 6,296,565

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Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Parenthetical) (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Receivables [Abstract]
Troubled debt restructuring threshold	$ 1

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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Common dividends declared, per share	$ 0.69	$ 0.66
Retained Earnings [Member]
Common dividends declared, per share	$ 0.69	$ 0.66

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Fair Value Measurement - Estimates Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Financial Assets
Cash and due from banks	$ 92,975	$ 94,002	$ 76,419	$ 95,551
Securities available-for-sale	1,559,718	917,424
Securities held-to-maturity	957,352	593,670
Net loans	4,909,018	4,042,112
Loans held for sale	10,765	5,865
Accrued interest receivable	27,000	18,481
Bank-owned life insurance	155,894	123,298
Financial Liabilities
Deposits	6,193,902	5,048,983
Federal Home Loan Bank borrowings	893,117	223,126
Other borrowings	84,587	80,690
Junior subordinated debt	106,196	106,176
Accrued interest payable	2,832	1,620
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial Assets
Cash and due from banks	92,975	94,002
Securities available-for-sale	7,844	8,440
Accrued interest receivable	27,000	18,481
Bank-owned life insurance	155,894	123,298
Financial Liabilities
Deposits	4,563,012	3,743,887
Other borrowings	81,744	77,534
Accrued interest payable	2,832	1,620
Significant Other Observable Inputs (Level 2) [Member]
Financial Assets
Securities available-for-sale	1,551,874	908,984
Securities held-to-maturity	983,280	618,895
Loans held for sale	10,765	5,865
Financial Liabilities
Deposits	1,640,621	1,312,941
Federal Home Loan Bank borrowings	895,641	225,456
Other borrowings	2,846	3,162
Junior subordinated debt	76,865	79,212
Significant Unobservable Inputs (Level 3) [Member]
Financial Assets
Securities held-to-maturity	717	722
Net loans	4,849,478	4,047,648
Carrying Amount [Member]
Financial Assets
Cash and due from banks	92,975	94,002
Securities available-for-sale	1,559,718	917,424
Securities held-to-maturity	957,352	593,670
Net loans	4,909,018	4,042,112
Loans held for sale	10,765	5,865
Accrued interest receivable	27,000	18,481
Bank-owned life insurance	155,894	123,298
Financial Liabilities
Deposits	6,193,902	5,048,983
Federal Home Loan Bank borrowings	893,117	223,126
Other borrowings	84,587	80,690
Junior subordinated debt	106,196	106,176
Accrued interest payable	2,832	1,620
Fair Value Estimate [Member]
Financial Assets
Cash and due from banks	92,975	94,002
Securities available-for-sale	1,559,718	917,424
Securities held-to-maturity	983,997	619,617
Net loans	4,849,478	4,047,648
Loans held for sale	10,765	5,865
Accrued interest receivable	27,000	18,481
Bank-owned life insurance	155,894	123,298
Financial Liabilities
Deposits	6,203,633	5,056,828
Federal Home Loan Bank borrowings	895,641	225,456
Other borrowings	84,590	80,696
Junior subordinated debt	76,865	79,212
Accrued interest payable	$ 2,832	$ 1,620

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Securities - Schedule of Fair Value and Amortized Cost of Available-for-sale and Held-to-maturity Securities (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	$ 1,550,277	$ 912,850
Available-for-sale, Gross Unrealized Gains	14,045	11,771
Available-for-sale, Gross Unrealized Losses	(4,604)	(7,197)
Available-for-sale, Estimated Fair Value	1,559,718	917,424
Held-to-maturity, Amortized Cost	957,352	593,670
Held-to-maturity, Gross Unrealized Gains	28,390	27,285
Held-to-maturity, Gross Unrealized Losses	(1,745)	(1,338)
Held-to-maturity securities, Fair value	983,997	619,617
Total securities, Amortized Cost	2,507,629	1,506,520
Total securities, Gross Unrealized Gains	42,435	39,056
Total securities, Gross Unrealized Losses	(6,349)	(8,535)
Total securities, Estimated Fair Value	2,543,715	1,537,041
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	1,248,057	703,535
Available-for-sale, Gross Unrealized Gains	6,767	4,336
Available-for-sale, Gross Unrealized Losses	(4,376)	(6,758)
Available-for-sale, Estimated Fair Value	1,250,448	701,113
Held-to-maturity, Amortized Cost	161,495	79,004
Held-to-maturity, Gross Unrealized Gains	2,848	3,262
Held-to-maturity, Gross Unrealized Losses	(358)	(246)
Held-to-maturity securities, Fair value	163,985	82,020
Obligations of State and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	85,523	86,073
Available-for-sale, Gross Unrealized Gains	4,830	5,365
Available-for-sale, Gross Unrealized Losses	(44)	(5)
Available-for-sale, Estimated Fair Value	90,309	91,433
Held-to-maturity, Amortized Cost	766,423	507,927
Held-to-maturity, Gross Unrealized Gains	25,359	23,917
Held-to-maturity, Gross Unrealized Losses	(1,336)	(1,043)
Held-to-maturity securities, Fair value	790,446	530,801
Corporate Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	127,201	25,974
Available-for-sale, Gross Unrealized Gains	318	141
Available-for-sale, Gross Unrealized Losses	(170)	(119)
Available-for-sale, Estimated Fair Value	127,349	25,996
Held-to-maturity, Amortized Cost	29,434	6,739
Held-to-maturity, Gross Unrealized Gains	183	106
Held-to-maturity, Gross Unrealized Losses	(51)	(49)
Held-to-maturity securities, Fair value	29,566	6,796
Obligations of Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	79,390	86,964
Available-for-sale, Gross Unrealized Gains	1,433	1,087
Available-for-sale, Gross Unrealized Losses	(14)	(315)
Available-for-sale, Estimated Fair Value	80,809	87,736
Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	1,540,171	902,546
Available-for-sale, Gross Unrealized Gains	13,348	10,929
Available-for-sale, Gross Unrealized Losses	(4,604)	(7,197)
Available-for-sale, Estimated Fair Value	1,548,915	906,278
Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	10,106	10,304
Available-for-sale, Gross Unrealized Gains	697	842
Available-for-sale, Estimated Fair Value	$ 10,803	$ 11,146

XML

Business Segments - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($) Segment	Sep. 30, 2014 USD ($)
Segment Reporting Information [Line Items]
Operating segments | Segment	2
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Market value of assets held by trust and investment services segment	$ 3,700.0	$ 3,800.0
Total non-fiduciary assets of the trust and investment services segment	$ 3.6	$ 4.0

XML

Loans and the Allowance for Credit Losses (Tables)

9 Months Ended

Sep. 30, 2015

Receivables [Abstract]

Schedule of Recorded Investment in Loans by Category

The recorded investment in loans is presented in the Consolidated Balance Sheets net of deferred loan fees and costs of $1.4 million and $2.4 million at September 30, 2015 and December 31, 2014, respectively.

(unaudited, in thousands)	September 30, 2015		December 31, 2014
Commercial real estate:
Land and construction	$	326,754	$	262,643
Improved property		1,856,584		1,682,817
Total commercial real estate		2,183,338		1,945,460
Commercial and industrial		725,730		638,410
Residential real estate		1,243,630		928,770
Home equity		403,387		330,031
Consumer		394,557		244,095
Total portfolio loans		4,950,642		4,086,766
Loans held for sale		10,765		5,865
Total loans	$	4,961,407	$	4,092,631

Summary of Changes in Allowance for Credit Losses

The following tables summarize changes in the allowance for credit losses applicable to each category of the loan portfolio:

	Allowance for Credit Losses By Category For the Nine Months Ended September 30, 2015 and 2014
(unaudited, in thousands)	Commercial Real Estate- Land and Construction			Commercial Real Estate- Improved Property			Commercial & Industrial			Residential Real Estate			Home Equity			Consumer			Deposit Overdraft			Total
Balance at December 31, 2014:
Allowance for loan losses	$	5,654		$	17,573		$	9,063		$	5,382		$	2,329		$	4,078		$	575		$	44,654
Allowance for loan commitments		194			10			112			9			90			40			—			455
Total beginning allowance for credit losses		5,848			17,583			9,175			5,391			2,419			4,118			575			45,109
Provision for credit losses:
Provision for loan losses		(826	)		977			2,434			325			1,320			922			441			5,593
Provision for loan commitments		9			11			137			—			19			(1	)		—			175
Total provision for credit losses		(817	)		988			2,571			325			1,339			921			441			5,768
Charge-offs		—			(3,964	)		(2,267	)		(1,482	)		(1,124	)		(1,968	)		(610	)		(11,415	)
Recoveries		1			661			356			472			161			968			173			2,792
Net charge-offs		1			(3,303	)		(1,911	)		(1,010	)		(963	)		(1,000	)		(437	)		(8,623	)
Balance at September 30, 2015:
Allowance for loan losses		4,829			15,247			9,586			4,697			2,686			4,000			579			41,624
Allowance for loan commitments		203			21			249			9			109			39			—			630
Total ending allowance for credit losses	$	5,032		$	15,268		$	9,835		$	4,706		$	2,795		$	4,039		$	579		$	42,254
Balance at December 31, 2013:
Allowance for loan losses	$	6,056		$	18,157		$	9,925		$	5,673		$	2,017		$	5,020		$	520		$	47,368
Allowance for loan commitments		301			62			130			5			85			19			—			602
Total beginning allowance for credit losses		6,357			18,219			10,055			5,678			2,102			5,039			520			47,970
Provision for credit losses:
Provision for loan losses		(812	)		(403	)		1,357			1,867			860			1,066			660			4,595
Provision for loan commitments		(35	)		(42	)		(6	)		1			12			1			—			(69	)
Total provision for credit losses		(847	)		(445	)		1,351			1,868			872			1,067			660			4,526
Charge-offs		—			(1,696	)		(2,632	)		(2,025	)		(591	)		(2,326	)		(577	)		(9,847	)
Recoveries		—			457			1,058			339			94			782			183			2,913
Net charge-offs		—			(1,239	)		(1,574	)		(1,686	)		(497	)		(1,544	)		(394	)		(6,934	)
Balance at September 30, 2014:
Allowance for loan losses		5,244			16,515			9,708			5,854			2,380			4,542			786			45,029
Allowance for loan commitments		266			20			124			6			97			20			—			533
Total ending allowance for credit losses	$	5,510		$	16,535		$	9,832		$	5,860		$	2,477		$	4,562		$	786		$	45,562

Allowance for Credit Losses and Recorded Investments in Loans

The following tables present the allowance for credit losses and recorded investments in loans by category:

	Allowance for Credit Losses and Recorded Investment in Loans
(unaudited, in thousands)	Commercial Real Estate- Land and Construction		Commercial Real Estate- Improved Property		Commercial and Industrial		Residential Real Estate		Home Equity		Consumer		Over-draft		Total
September 30, 2015
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	1,152	$	1,498	$	—	$	—	$	—	$	—	$	2,650
Allowance for loans collectively evaluated for impairment		4,829		14,095		8,088		4,697		2,686		4,000		579		38,974
Allowance for loan commitments		203		21		249		9		109		39		—		630
Total allowance for credit losses	$	5,032	$	15,268	$	9,835	$	4,706	$	2,795	$	4,039	$	579	$	42,254
Portfolio loans:
Individually evaluated for impairment (1)	$	873	$	12,468	$	4,884	$	—	$	—	$	—	$	—	$	18,225
Collectively evaluated for impairment		325,881		1,844,116		720,846		1,243,630		403,387		394,557		—		4,932,417
Total portfolio loans	$	326,754	$	1,856,584	$	725,730	$	1,243,630	$	403,387	$	394,557	$	—	$	4,950,642
December 31, 2014
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	2,765	$	1,033	$	—	$	—	$	—	$	—	$	3,798
Allowance for loans collectively evaluated for impairment		5,654		14,808		8,030		5,382		2,329		4,078		575		40,856
Allowance for loan commitments		194		10		112		9		90		40		—		455
Total allowance for credit losses	$	5,848	$	17,583	$	9,175	$	5,391	$	2,419	$	4,118	$	575	$	45,109
Portfolio loans:
Individually evaluated for impairment (1)	$	—	$	11,469	$	2,844	$	—	$	—	$	—	$	—	$	14,313
Collectively evaluated for impairment		262,643		1,671,348		635,566		928,770		330,031		244,095		—		4,072,453
Total portfolio loans	$	262,643	$	1,682,817	$	638,410	$	928,770	$	330,031	$	244,095	$	—	$	4,086,766

⁽¹⁾  Commercial loans greater than $1 million that are reported as non-accrual or as troubled debt restructuring (“TDR”), including acquired with deteriorated credit quality, are individually evaluated for impairment.

Summary of Commercial Loans by Risk Grade

The following tables summarize commercial loans by their assigned risk grade:

	Commerical Loans by Internally Assigned Risk Grade
(unaudited, in thousands)	Commercial Real Estate- Land and Construction		Commercial Real Estate- Improved Property		Commercial & Industrial		Total Commercial Loans
As of September 30, 2015
Pass	$	316,128	$	1,807,011	$	704,472	$	2,827,611
Criticized - compromised		8,170		13,895		10,188		32,253
Classified - substandard		2,456		35,678		11,070		49,204
Classified - doubtful		—		—		—		—
Total	$	326,754	$	1,856,584	$	725,730	$	2,909,068
As of December 31, 2014
Pass	$	257,218	$	1,627,771	$	617,742	$	2,502,731
Criticized - compromised		3,645		17,873		12,770		34,288
Classified - substandard		1,780		37,173		7,898		46,851
Classified - doubtful		—		—		—		—
Total	$	262,643	$	1,682,817	$	638,410	$	2,583,870

Summary of Age Analysis of Loan Categories

The following tables summarize the age analysis of all categories of loans:

	Age Analysis of Loans
(unaudited, in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total Past Due		Total Loans		90 Days or More Past  Due and Accruing (1)
As of September 30, 2015
Commercial real estate:
Land and construction	$	322,921	$	—	$	14	$	3,819	$	3,833	$	326,754	$	2,528
Improved property		1,844,067		2,066		1,887		8,564		12,517		1,856,584		—
Total commercial real estate		2,166,988		2,066		1,901		12,383		16,350		2,183,338		2,528
Commercial and industrial		723,414		79		178		2,059		2,316		725,730		769
Residential real estate		1,230,877		1,419		3,031		8,303		12,753		1,243,630		1,888
Home equity		398,446		2,154		376		2,411		4,941		403,387		516
Consumer		389,776		3,342		971		468		4,781		394,557		378
Total portfolio loans		4,909,501		9,060		6,457		25,624		41,141		4,950,642		6,079
Loans held for sale		10,765		—		—		—		—		10,765		—
Total loans	$	4,920,266	$	9,060	$	6,457	$	25,624	$	41,141	$	4,961,407	$	6,079
Impaired loans included above are as follows:
Non-accrual loans	$	19,854	$	855	$	1,530	$	19,055	$	21,440	$	41,294
TDRs accruing interest (1)		10,830		503		207		490		1,200		12,030
Total impaired	$	30,684	$	1,358	$	1,737	$	19,545	$	22,640	$	53,324
As of December 31, 2014
Commercial real estate:
Land and construction	$	261,356	$	20	$	—	$	1,267	$	1,287	$	262,643	$	71
Improved property		1,665,363		961		4,772		11,721		17,454		1,682,817		—
Total commercial real estate		1,926,719		981		4,772		12,988		18,741		1,945,460		71
Commercial and industrial		634,482		1,834		240		1,854		3,928		638,410		22
Residential real estate		915,968		1,237		3,384		8,181		12,802		928,770		1,306
Home equity		325,291		1,877		895		1,968		4,740		330,031		570
Consumer		240,365		2,571		685		474		3,730		244,095		319
Total portfolio loans		4,042,825		8,500		9,976		25,465		43,941		4,086,766		2,288
Loans held for sale		5,865		—		—		—		—		5,865		—
Total loans	$	4,048,690	$	8,500	$	9,976	$	25,465	$	43,941	$	4,092,631	$	2,288
Impaired loans included above are as follows:
Non-accrual loans	$	7,562	$	2,884	$	5,552	$	22,820	$	31,256	$	38,818
TDRs accruing interest (1)		11,016		151		542		357		1,050		12,066
Total impaired	$	18,578	$	3,035	$	6,094	$	23,177	$	32,306	$	50,884

⁽¹⁾ Loans 90 days or more past due and accruing interest exclude TDRs 90 days or more past due and accruing interest.

Summary of Impaired Loans

The following tables summarize impaired loans:

	Impaired Loans
	September 30, 2015						December 31, 2014
(unaudited, in thousands)	Unpaid Principal Balance (1)		Recorded Investment		Related Allowance		Unpaid Principal Balance (1)		Recorded Investment		Related Allowance
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	2,485	$	2,319	$	—	$	1,588	$	1,488	$	—
Improved property		24,277		17,234		—		16,480		14,684		—
Commercial and industrial		3,608		2,924		—		3,152		2,597		—
Residential real estate		18,736		17,048		—		20,077		18,544		—
Home equity		3,689		3,310		—		2,890		2,663		—
Consumer		1,421		1,095		—		1,287		1,086		—
Total impaired loans without a specific allowance		54,216		43,930		—		45,474		41,062		—
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—		—		—		—		—
Improved property		5,719		4,510		1,152		7,980		7,980		2,765
Commercial and industrial		6,188		4,884		1,498		1,842		1,842		1,033
Total impaired loans with a specific allowance		11,907		9,394		2,650		9,822		9,822		3,798
Total impaired loans	$	66,123	$	53,324	$	2,650	$	55,296	$	50,884	$	3,798

⁽¹⁾ The difference between the unpaid principal balance and the recorded investment generally reflects amounts that have been previously charged-off and fair market value adjustments on acquired impaired loans.

	Impaired Loans
	For the Three Months Ended										For the Nine Months Ended
	September 30, 2015					September 30, 2014					September 30, 2015				September 30, 2014
	Average		Interest			Average		Interest			Average		Interest		Average		Interest
	Recorded		Income			Recorded		Income			Recorded		Income		Recorded		Income
(unaudited, in thousands)	Investment		Recognized			Investment		Recognized			Investment		Recognized		Investment		Recognized
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	2,414	$	12		$	1,749	$	11		$	2,198	$	30	$	2,099	$	26
Improved property		19,118		245			17,672		169			18,850		708		18,415		322
Commercial and industrial		3,193		37			4,071		(2	)		2,854		99		3,802		87
Residential real estate		17,508		200			18,337		219			18,173		665		18,900		610
Home equity		3,153		34			2,191		13			2,896		75		2,279		48
Consumer		1,142		27			1,087		26			1,176		73		1,131		72
Total impaired loans without a specific allowance		46,528		555			45,107		436			46,147		1,650		46,626		1,165
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—			—		—			—		—		—		—
Improved property		6,011		(56	)		2,269		109			6,617		—		1,499		113
Commercial and industrial		4,707		63			1,938		27			3,256		200		2,134		68
Total impaired loans with a specific allowance		10,718		7			4,207		136			9,873		200		3,633		181
Total impaired loans	$	57,246	$	562		$	49,314	$	572		$	56,020	$	1,850	$	50,259	$	1,346

Recorded Investment in Non-Accrual Loans and TDRs

The following tables present the recorded investment in non-accrual loans and TDRs:

	Non-accrual Loans (1)
	September 30,		December 31,
(unaudited, in thousands)	2015		2014
Commercial real estate:
Land and construction	$	1,369	$	1,488
Improved property		19,732		20,227
Total commercial real estate		21,101		21,715
Commercial and industrial		7,591		4,110
Residential real estate		9,331		10,329
Home equity		2,643		1,923
Consumer		628		741
Total	$	41,294	$	38,818

⁽¹⁾  Total non-accrual loans include loans that are also restructured. Such loans are also set forth in the following table as non-accrual TDRs.

	TDRs
	September 30, 2015						December 31, 2014
(unaudited, in thousands)	Accruing		Non- Accrual		Total		Accruing		Non- Accrual		Total
Commercial real estate:
Land and construction	$	950	$	509	$	1,459	$	—	$	464	$	464
Improved property		2,012		9,615		11,627		2,437		1,850		4,287
Total commercial real estate		2,962		10,124		13,086		2,437		2,314		4,751
Commercial and industrial		217		242		459		329		478		807
Residential real estate		7,717		1,826		9,543		8,215		2,074		10,289
Home equity		667		271		938		740		245		985
Consumer		467		198		665		345		309		654
Total	$	12,030	$	12,661	$	24,691	$	12,066	$	5,420	$	17,486

Loans Identified as TDRs

The following table presents details related to loans identified as TDRs during the three and nine months ended September 30, 2015 and 2014, respectively:

	New TDRs (1)
	For the Three Months Ended
	September 30, 2015						September 30, 2014
			Pre-		Post-				Pre-		Post-
			Modification		Modification				Modification		Modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(unaudited, dollars in thousands)	Modifications		Investment		Investment		Modifications		Investment		Investment
Commercial real estate:
Land and construction		1	$	13	$	12		—	$	—	$	—
Improved Property		—		—		—		2		475		465
Total commercial real estate		1		13		12		2		475		465
Commercial and industrial		—		—		—		—		—		—
Residential real estate		—		—		—		1		112		112
Home equity		—		—		—		1		58		57
Consumer		—		—		—		2		52		50
Total		1	$	13	$	12		6	$	697	$	684

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

	New TDRs (1)
	For the Nine Months Ended
	September 30, 2015						September 30, 2014
			Pre-		Post-				Pre-		Post-
			Modification		Modification				Modification		Modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(unaudited, dollars in thousands)	Modifications		Investment		Investment		Modifications		Investment		Investment
Commercial real estate:
Land and construction		8	$	1,065	$	1,002		—	$	—	$	—
Improved property		7		9,336		8,541		4		692		664
Total commercial real estate		15		10,401		9,543		4		692		664
Commercial and industrial		2		42		50		—		—		—
Residential real estate		8		466		447		5		286		278
Home equity		1		7		6		1		59		57
Consumer		19		279		267		12		191		163
Total		45	$	11,195	$	10,313		22	$	1,228	$	1,162

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

TDRs Defaulted Later Restructured

The following tables summarize TDRs which defaulted (defined as past due 90 days) during the three and nine months ended September 30, 2015 and 2014, respectively, that were restructured within the last twelve months prior to September 30, 2015 and 2014, respectively:

	Defaulted TDRs (1)
	For the Three Months Ended
	September 30, 2015				September 30, 2014
	Number of		Recorded		Number of		Recorded
(unaudited, dollars in thousands)	Defaults		Investment		Defaults		Investment
Commercial real estate:
Land and construction		—	$	—		—	$	—
Improved property		—		—		—		—
Total commercial real estate		—		—		—		—
Commercial and industrial		—		—		—		—
Residential real estate		—		—		—		—
Home equity		—		—		—		—
Consumer		1		20		—		—
Total		1	$	20		—	$	—

⁽¹⁾  Excludes loans that were either charged-off or cured by period end. The recorded investment is as of September 30, 2015 and 2014, respectively.

	Defaulted TDRs (1)
	For the Nine Months Ended
	September 30, 2015				September 30, 2014
	Number of		Recorded		Number of		Recorded
(unaudited, dollars in thousands)	Defaults		Investment		Defaults		Investment
Commercial real estate:
Land and construction		—	$	—		—	$	—
Improved property		—		—		—		—
Total commercial real estate		—		—		—		—
Commercial and industrial		—		—		—		—
Residential real estate		—		—		1		45
Home equity		1		42		—		—
Consumer		1		20		—		—
Total		2	$	62		1	$	45

⁽¹⁾  Excludes loans that were either charged-off or cured by period end. The recorded investment is as of September 30, 2015 and 2014, respectively.

Summary of Other Real Estate Owned and Repossessed Assets

The following table summarizes other real estate owned and repossessed assets included in other assets:

	September 30,		December 31,
(unaudited, in thousands)	2015		2014
Other real estate owned	$	5,967	$	4,920
Repossessed assets		95		162
Total other real estate owned and repossessed assets	$	6,062	$	5,082

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Securities - Additional Information (Detail)	9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) Holdings	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($) Holdings
Amortized Cost and Fair Value Debt Securities [Abstract]
Maximum percentage of equity of one issuer	10.00%
Number of holdings greater than specified percentage of equity | Holdings	0		0
Securities with aggregate fair values	$ 1,100,000,000		$ 706,500,000
Proceeds from sale of available-for-sale securities	570,739,000	$ 4,819,000
Net unrealized gains on available-for-sale securities included in AOCI	6,000,000		2,900,000
Impaired loss relating to securities	0
Federal home loan bank stock, Total	$ 39,500,000		$ 11,600,000

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Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis

The following tables set forth WesBanco’s financial assets and liabilities that were accounted for at fair value on a recurring and nonrecurring basis by level within the fair value hierarchy as of September 30, 2015 and December 31, 2014:

			September 30, 2015
			Fair Value Measurements Using:
(unaudited, in thousands)	September 30, 2015		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Recurring fair value measurements
Securities - available-for-sale
Obligations of government agencies	$	80,809	$	—	$	80,809	$	—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,250,448		—		1,250,448		—
Obligations of state and political subdivisions		90,309		—		90,309		—
Corporate debt securities		127,349		—		127,349		—
Equity securities		10,803		7,844		2,959		—
Total securities - available-for-sale	$	1,559,718	$	7,844	$	1,551,874	$	—
Total recurring fair value measurements	$	1,559,718	$	7,844	$	1,551,874	$	—
Nonrecurring fair value measurements
Impaired loans	$	6,744	$	—	$	—	$	6,744
Other real estate owned and repossessed assets		6,062		—		—		6,062
Loans held for sale		10,765		—		10,765		—
Total nonrecurring fair value measurements	$	23,571	$	—	$	10,765	$	12,806
			December 31, 2014
			Fair Value Measurements Using:
(unaudited, in thousands)	December 31, 2014		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Recurring fair value measurements
Securities - available-for-sale
Obligations of government agencies	$	87,736	$	—	$	87,736	$	—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		701,113		—		701,113		—
Obligations of state and political subdivisions		91,433		—		91,433		—
Corporate debt securities		25,996		—		25,996		—
Equity securities		11,146		8,440		2,706		—
Total securities - available-for-sale	$	917,424	$	8,440	$	908,984	$	—
Total recurring fair value measurements	$	917,424	$	8,440	$	908,984	$	—
Nonrecurring fair value measurements
Impaired loans	$	6,024	$	—	$	—	$	6,024
Other real estate owned and repossessed assets		5,082		—		—		5,082
Loans held for sale		5,865		—		5,865		—
Total nonrecurring fair value measurements	$	16,971	$	—	$	5,865	$	11,106

Schedule of Assets Measured at Fair Value on Nonrecurring Basis

The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which WesBanco has utilized level 3 inputs to determine fair value:

	Quantitative Information about Level 3 Fair Value Measurements
(unaudited, in thousands)	Fair Value Estimate		Valuation Techniques	Unobservable Input	Range (Weighted Average)
September 30, 2015:
Impaired loans	$	6,744	Appraisal of collateral (1)	Appraisal adjustments (2)	0% to (39.1%) / (20.3%)
				Liquidation expenses (2)	(3.1%) to (8.0%) / (6.9%)
Other real estate owned and repossessed assets		6,062	Appraisal of collateral (1), (3)
December 31, 2014:
Impaired loans	$	6,024	Appraisal of collateral (1)	Appraisal adjustments (2)	0% to (39.7%) / (6.7%)
				Liquidation expenses (2)	(1.2%) to (8.0%) / (6.7%)
Other real estate owned and repossessed assets		5,082	Appraisal of collateral (1), (3)

⁽¹⁾ Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.

⁽²⁾  Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of appraisal adjustments and liquidation expenses are presented as a percent of the appraisal.

⁽³⁾  Includes estimated liquidation expenses and numerous dissimilar qualitative adjustments by management which are not identifiable.

Estimates Fair Values of Financial Instruments

The estimated fair values of WesBanco’s financial instruments are summarized below:

					Fair Value Measurements at September 30, 2015
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Financial Assets
Cash and due from banks	$	92,975	$	92,975	$	92,975	$	—	$	—
Securities available-for-sale		1,559,718		1,559,718		7,844		1,551,874		—
Securities held-to-maturity		957,352		983,997		—		983,280		717
Net loans		4,909,018		4,849,478		—		—		4,849,478
Loans held for sale		10,765		10,765		—		10,765		—
Accrued interest receivable		27,000		27,000		27,000		—		—
Bank-owned life insurance		155,894		155,894		155,894		—		—
Financial Liabilities
Deposits		6,193,902		6,203,633		4,563,012		1,640,621		—
Federal Home Loan Bank borrowings		893,117		895,641		—		895,641		—
Other borrowings		84,587		84,590		81,744		2,846		—
Junior subordinated debt		106,196		76,865		—		76,865		—
Accrued interest payable		2,832		2,832		2,832		—		—
					Fair Value Measurements at December 31, 2014
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Financial Assets
Cash and due from banks	$	94,002	$	94,002	$	94,002	$	—	$	—
Securities available-for-sale		917,424		917,424		8,440		908,984		—
Securities held-to-maturity		593,670		619,617		—		618,895		722
Net loans		4,042,112		4,047,648		—		—		4,047,648
Loans held for sale		5,865		5,865		—		5,865		—
Accrued interest receivable		18,481		18,481		18,481		—		—
Bank-owned life insurance		123,298		123,298		123,298		—		—
Financial Liabilities
Deposits		5,048,983		5,056,828		3,743,887		1,312,941		—
Federal Home Loan Bank borrowings		223,126		225,456		—		225,456		—
Other borrowings		80,690		80,696		77,534		3,162		—
Junior subordinated debt		106,176		79,212		—		79,212		—
Accrued interest payable		1,620		1,620		1,620		—		—

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Cash Flows [Abstract]
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 58,591	$ 70,215
INVESTING ACTIVITIES
Net increase in loans	(176,375)	(142,693)
Securities available-for-sale:
Proceeds from sales	570,739	4,819
Proceeds from maturities, prepayments and calls	233,756	169,094
Purchases of securities	(509,216)	(192,340)
Securities held-to-maturity:
Proceeds from maturities, prepayments and calls	39,492	34,572
Purchases of securities	(297,692)	(33,153)
Proceeds from bank-owned life insurance	1,281	2,284
Cash paid to acquire a business, net of cash acquired	(28,551)
Purchases of premises and equipment - net	(6,936)	(4,409)
Net cash used in investing activities	(173,502)	(161,826)
FINANCING ACTIVITIES
(Decrease) increase in deposits	(99,569)	39,688
Proceeds from Federal Home Loan Bank borrowings	791,910	100,532
Repayment of Federal Home Loan Bank borrowings	(514,081)	(16,559)
Decrease in other short-term borrowings	(1,103)	(64,074)
Increase in federal funds purchased		30,000
Repayment of junior subordinated debt	(36,083)
Repurchase of common stock warrant	(2,247)
Dividends paid to common shareholders	(24,148)	(18,695)
Treasury shares (purchased) sold - net	(795)	1,587
Net cash provided by financing activities	113,884	72,479
Net decrease in cash and cash equivalents	(1,027)	(19,132)
Cash and cash equivalents at beginning of the period	94,002	95,551
Cash and cash equivalents at end of the period	92,975	76,419
SUPPLEMENTAL DISCLOSURES
Interest paid on deposits and other borrowings	19,166	18,672
Income taxes paid	9,695	12,300
Transfers of loans to other real estate owned	1,029	$ 1,832
Non-cash transactions related to ESB acquisition	$ (301,933)

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Interest bearing deposits, banks	$ 2,144	$ 8,405
Held-to-maturity securities, fair values	$ 983,997	$ 619,617
Preferred stock, no par value
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 2.0833	$ 2.0833
Common stock, shares authorized	100,000,000	50,000,000
Common stock, shares issued	38,546,042	29,367,511
Common stock, shares outstanding	38,517,542	29,298,188
Treasury stock, shares	28,550	69,323

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Business Segments

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Business Segments

NOTE 10. BUSINESS SEGMENTS

WesBanco operates two reportable segments: community banking and trust and investment services. WesBanco’s community banking segment offers services traditionally offered by full-service commercial banks, including commercial demand, individual demand and time deposit accounts, as well as commercial, mortgage and individual installment loans, and certain non-traditional offerings, such as insurance and securities brokerage services. The trust and investment services segment offers trust services as well as various alternative investment products including mutual funds. The market value of assets managed or held in custody by the trust and investment services segment was approximately $3.7 billion and $3.8 billion at September 30, 2015 and 2014, respectively. These assets are held by WesBanco in fiduciary or agency capacities for their customers and therefore are not included as assets on WesBanco’s Consolidated Balance Sheets.

Condensed financial information by business segment is presented below:

(unaudited, in thousands)	Community Banking		Trust and Investment Services		Consolidated
For the Three Months ended September 30, 2015:
Interest income	$	66,935	$	—	$	66,935
Interest expense		6,326		—		6,326
Net interest income		60,609		—		60,609
Provision for credit losses		1,798		—		1,798
Net interest income after provision for credit losses		58,811		—		58,811
Non-interest income		13,060		5,126		18,186
Non-interest expense		44,039		2,942		46,981
Income before provision for income taxes		27,832		2,184		30,016
Provision for income taxes		6,894		874		7,768
Net income	$	20,938	$	1,310	$	22,248
For the Three Months ended September 30, 2014:
Interest income	$	54,303	$	—	$	54,303
Interest expense		5,692		—		5,692
Net interest income		48,611		—		48,611
Provision for credit losses		1,478		—		1,478
Net interest income after provision for credit losses		47,133		—		47,133
Non-interest income		11,558		5,096		16,654
Non-interest expense		36,292		2,971		39,263
Income before provision for income taxes		22,399		2,125		24,524
Provision for income taxes		5,508		850		6,358
Net income	$	16,891	$	1,275	$	18,166
For the Nine Months ended September 30, 2015:
Interest income	$	194,052	$	—	$	194,052
Interest expense		17,685		—		17,685
Net interest income		176,367		—		176,367
Provision for credit losses		5,768		—		5,768
Net interest income after provision for credit losses		170,599		—		170,599
Non-interest income		37,785		16,655		54,440
Non-interest expense		137,903		9,126		147,029
Income before provision for income taxes		70,481		7,529		78,010
Provision for income taxes		17,238		3,012		20,250
Net income	$	53,243	$	4,517	$	57,760
For the Nine Months ended September 30, 2014:
Interest income	$	161,805	$	—	$	161,805
Interest expense		17,562		—		17,562
Net interest income		144,243		—		144,243
Provision for credit losses		4,526		—		4,526
Net interest income after provision for credit losses		139,717		—		139,717
Non-interest income		35,990		15,954		51,944
Non-interest expense		110,485		9,176		119,661
Income before provision for income taxes		65,222		6,778		72,000
Provision for income taxes		15,827		2,711		18,538
Net income	$	49,395	$	4,067	$	53,462

Total non-fiduciary assets of the trust and investment services segment were $3.6 million and $4.0 million at September 30, 2015 and 2014, respectively. All other assets, including goodwill and other intangible assets, were allocated to the community banking segment.

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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 23, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Trading Symbol	WSBC
Entity Registrant Name	WESBANCO INC
Entity Central Index Key	0000203596
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		38,512,012

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Basis of Presentation

Basis of presentation — The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2014.

WesBanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2014 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly WesBanco’s financial position and results of operations for each of the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.

Recent Accounting Pronouncements

Recent accounting pronouncements — In September 2015, the Financial Accounting Standards Board (the “FASB”) issued an Accounting Standards Update (“ASU”) (ASU 2015-16) that eliminates the requirement that an acquirer in a business combination account for measurement-period adjustments retrospectively. Instead, acquirers must recognize measurement-period adjustments during the period in which they determine the amounts, including the effect on earnings of any amounts they would have recorded in previous periods if the accounting had been completed at the acquisition date. The acquirer still must disclose the amounts and reasons for adjustments to the provisional amounts. The acquirer also must disclose, by line item, the amount of the adjustment reflected in the current-period income statement that would have been recognized in previous periods if the adjustment to provisional amounts had been recognized as of the acquisition date. Alternatively, an acquirer may present those amounts separately on the face of the income statement. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2015, including interim periods with those fiscal years. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

In May 2015, the FASB issued ASU 2015-07 related to disclosures for investments in certain entities that calculate net asset value (NAV) per share (or its equivalent). This update removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient and modifies certain disclosure requirements. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2015, and requires retrospective adoption. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

In April 2015, the FASB issued ASU 2015-05 that provides guidance on when to account for a cloud computing arrangement as a software license. The guidance applies only to internal-use software that a customer obtains access to in a hosting arrangement if both of the following criteria are met: (1) The customer has the contractual right to take possession of the software at any time during the hosting period without significant penalty, (2) it is feasible for the customer to either run the software on its own hardware or contract with another party unrelated to the vendor to host the software. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

In February 2015, the FASB issued ASU 2015-02 that revised the consolidation model, requiring reporting entities to reevaluate whether they should consolidate certain legal entities under the revised model. The amendments in this update modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities (VIEs) or voting interest entities, and eliminate the presumption that a general partner should consolidate and affect the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The pronouncement also provides for a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements similar to those in Rule 2a-7 of the Investment Company Act of 1940 for registered money market funds. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements.

        In August 2014, the FASB issued ASU 2014-14 related to the classification of certain government-guaranteed mortgage loans upon foreclosure. The amendments in this update require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the following conditions are met: (1) The loan has a government guarantee that is not separable from the loan before foreclosure, (2) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim, (3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based upon the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The pronouncement is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014 and may be adopted under either a modified retrospective transition method or a prospective transition method. However, the same method of transition as elected under ASU 2014-04 must be applied. While early adoption was permitted, WesBanco elected to adopt the ASU in the first quarter of 2015, which was the first interim period after December 31, 2014. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In June 2014, the FASB issued ASU 2014-11 related to repurchase-to-maturity transactions, repurchase financing and disclosures. The pronouncement changes the accounting for repurchase-to-maturity transactions and linked repurchase financings to secured borrowing accounting, which is consistent with the accounting for other repurchase agreements. The pronouncement also requires two new disclosures. The first disclosure requires an entity to disclose information on transfers accounted for as sales in transactions that are economically similar to repurchase agreements. The second disclosure provides increased transparency about the types of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The pronouncement is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. WesBanco adopted the ASU in the first quarter of 2015. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In May 2014, the FASB issued ASU 2014-09 related to the recognition of revenue from contracts with customers. The new revenue pronouncement creates a single source of revenue guidance for all companies in all industries and is more principles-based than current revenue guidance. The pronouncement provides a five-step model for a company to recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The five steps are, (1) identify the contract with the customer, (2) identify the separate performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the separate performance obligations and (5) recognize revenue when each performance obligation is satisfied. The pronouncement was originally effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2016 using either a full retrospective approach for all periods presented in the period of adoption or a modified retrospective approach. Early adoption is not permitted. On July 9, 2015, the FASB approved a one-year deferral of the effective date of the update. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is now permitted as of the original effective date for interim and annual reporting periods in fiscal years beginning after December 15, 2016. WesBanco is currently evaluating the impact of the adoption of this pronouncement on its Consolidated Financial Statements.

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 51,876	$ 43,399	$ 151,913	$ 128,691
Interest and dividends on securities:
Taxable	10,251	7,375	28,792	22,051
Tax-exempt	4,535	3,413	12,120	10,234
Total interest and dividends on securities	14,786	10,788	40,912	32,285
Other interest income	273	116	1,227	829
Total interest and dividend income	66,935	54,303	194,052	161,805
INTEREST EXPENSE
Interest bearing demand deposits	517	399	1,425	1,168
Money market deposits	485	487	1,430	1,394
Savings deposits	165	135	475	398
Certificates of deposit	2,662	3,254	8,403	10,305
Total interest expense on deposits	3,829	4,275	11,733	13,265
Federal Home Loan Bank borrowings	1,650	264	3,157	650
Other short-term borrowings	89	348	254	1,255
Junior subordinated debt owed to unconsolidated subsidiary trusts	758	805	2,541	2,392
Total interest expense	6,326	5,692	17,685	17,562
NET INTEREST INCOME	60,609	48,611	176,367	144,243
Provision for credit losses	1,798	1,478	5,768	4,526
Net interest income after provision for credit losses	58,811	47,133	170,599	139,717
NON-INTEREST INCOME
Trust fees	5,127	5,096	16,656	15,954
Service charges on deposits	4,425	4,170	12,342	12,107
Electronic banking fees	3,849	3,268	10,670	9,549
Net securities brokerage revenue	1,996	1,701	5,897	5,533
Bank-owned life insurance	1,021	882	3,264	3,577
Net gains on sales of mortgage loans	779	550	1,459	1,178
Net securities gains	47	581	69	756
Net (loss) / gain on other real estate owned and other assets	(18)	(1,167)	167	(1,218)
Other income	960	1,573	3,916	4,508
Total non-interest income	18,186	16,654	54,440	51,944
NON-INTEREST EXPENSE
Salaries and wages	19,832	17,331	57,468	50,700
Employee benefits	6,028	5,051	20,151	16,289
Net occupancy	3,533	2,916	10,298	9,265
Equipment	3,731	2,837	9,689	8,534
Marketing	1,514	1,276	4,221	3,992
FDIC insurance	1,064	786	3,014	2,543
Amortization of intangible assets	815	477	2,325	1,454
Restructuring and merger-related expense	185		11,033
Other operating expenses	10,279	8,589	28,830	26,884
Total non-interest expense	46,981	39,263	147,029	119,661
Income before provision for income taxes	30,016	24,524	78,010	72,000
Provision for income taxes	7,768	6,358	20,250	18,538
NET INCOME	$ 22,248	$ 18,166	$ 57,760	$ 53,462
EARNINGS PER COMMON SHARE
Basic	$ 0.58	$ 0.62	$ 1.55	$ 1.83
Diluted	$ 0.58	$ 0.62	$ 1.55	$ 1.82
AVERAGE COMMON SHARES OUTSTANDING
Basic	38,523,593	29,280,648	37,144,783	29,235,364
Diluted	38,556,995	29,360,880	37,204,114	29,316,914
DIVIDENDS DECLARED PER COMMON SHARE	$ 0.23	$ 0.22	$ 0.69	$ 0.66
COMPREHENSIVE INCOME	$ 29,504	$ 16,136	$ 62,139	$ 58,773

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Loans and the Allowance for Credit Losses

9 Months Ended

Sep. 30, 2015

Receivables [Abstract]

Loans and the Allowance for Credit Losses

NOTE 5. LOANS AND THE ALLOWANCE FOR CREDIT LOSSES

The recorded investment in loans is presented in the Consolidated Balance Sheets net of deferred loan fees and costs of $1.4 million and $2.4 million at September 30, 2015 and December 31, 2014, respectively.

(unaudited, in thousands)	September 30, 2015		December 31, 2014
Commercial real estate:
Land and construction	$	326,754	$	262,643
Improved property		1,856,584		1,682,817
Total commercial real estate		2,183,338		1,945,460
Commercial and industrial		725,730		638,410
Residential real estate		1,243,630		928,770
Home equity		403,387		330,031
Consumer		394,557		244,095
Total portfolio loans		4,950,642		4,086,766
Loans held for sale		10,765		5,865
Total loans	$	4,961,407	$	4,092,631

The following tables summarize changes in the allowance for credit losses applicable to each category of the loan portfolio:

	Allowance for Credit Losses By Category For the Nine Months Ended September 30, 2015 and 2014
(unaudited, in thousands)	Commercial Real Estate- Land and Construction			Commercial Real Estate- Improved Property			Commercial & Industrial			Residential Real Estate			Home Equity			Consumer			Deposit Overdraft			Total
Balance at December 31, 2014:
Allowance for loan losses	$	5,654		$	17,573		$	9,063		$	5,382		$	2,329		$	4,078		$	575		$	44,654
Allowance for loan commitments		194			10			112			9			90			40			—			455
Total beginning allowance for credit losses		5,848			17,583			9,175			5,391			2,419			4,118			575			45,109
Provision for credit losses:
Provision for loan losses		(826	)		977			2,434			325			1,320			922			441			5,593
Provision for loan commitments		9			11			137			—			19			(1	)		—			175
Total provision for credit losses		(817	)		988			2,571			325			1,339			921			441			5,768
Charge-offs		—			(3,964	)		(2,267	)		(1,482	)		(1,124	)		(1,968	)		(610	)		(11,415	)
Recoveries		1			661			356			472			161			968			173			2,792
Net charge-offs		1			(3,303	)		(1,911	)		(1,010	)		(963	)		(1,000	)		(437	)		(8,623	)
Balance at September 30, 2015:
Allowance for loan losses		4,829			15,247			9,586			4,697			2,686			4,000			579			41,624
Allowance for loan commitments		203			21			249			9			109			39			—			630
Total ending allowance for credit losses	$	5,032		$	15,268		$	9,835		$	4,706		$	2,795		$	4,039		$	579		$	42,254
Balance at December 31, 2013:
Allowance for loan losses	$	6,056		$	18,157		$	9,925		$	5,673		$	2,017		$	5,020		$	520		$	47,368
Allowance for loan commitments		301			62			130			5			85			19			—			602
Total beginning allowance for credit losses		6,357			18,219			10,055			5,678			2,102			5,039			520			47,970
Provision for credit losses:
Provision for loan losses		(812	)		(403	)		1,357			1,867			860			1,066			660			4,595
Provision for loan commitments		(35	)		(42	)		(6	)		1			12			1			—			(69	)
Total provision for credit losses		(847	)		(445	)		1,351			1,868			872			1,067			660			4,526
Charge-offs		—			(1,696	)		(2,632	)		(2,025	)		(591	)		(2,326	)		(577	)		(9,847	)
Recoveries		—			457			1,058			339			94			782			183			2,913
Net charge-offs		—			(1,239	)		(1,574	)		(1,686	)		(497	)		(1,544	)		(394	)		(6,934	)
Balance at September 30, 2014:
Allowance for loan losses		5,244			16,515			9,708			5,854			2,380			4,542			786			45,029
Allowance for loan commitments		266			20			124			6			97			20			—			533
Total ending allowance for credit losses	$	5,510		$	16,535		$	9,832		$	5,860		$	2,477		$	4,562		$	786		$	45,562

The following tables present the allowance for credit losses and recorded investments in loans by category:

	Allowance for Credit Losses and Recorded Investment in Loans
(unaudited, in thousands)	Commercial Real Estate- Land and Construction		Commercial Real Estate- Improved Property		Commercial and Industrial		Residential Real Estate		Home Equity		Consumer		Over-draft		Total
September 30, 2015
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	1,152	$	1,498	$	—	$	—	$	—	$	—	$	2,650
Allowance for loans collectively evaluated for impairment		4,829		14,095		8,088		4,697		2,686		4,000		579		38,974
Allowance for loan commitments		203		21		249		9		109		39		—		630
Total allowance for credit losses	$	5,032	$	15,268	$	9,835	$	4,706	$	2,795	$	4,039	$	579	$	42,254
Portfolio loans:
Individually evaluated for impairment (1)	$	873	$	12,468	$	4,884	$	—	$	—	$	—	$	—	$	18,225
Collectively evaluated for impairment		325,881		1,844,116		720,846		1,243,630		403,387		394,557		—		4,932,417
Total portfolio loans	$	326,754	$	1,856,584	$	725,730	$	1,243,630	$	403,387	$	394,557	$	—	$	4,950,642
December 31, 2014
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	2,765	$	1,033	$	—	$	—	$	—	$	—	$	3,798
Allowance for loans collectively evaluated for impairment		5,654		14,808		8,030		5,382		2,329		4,078		575		40,856
Allowance for loan commitments		194		10		112		9		90		40		—		455
Total allowance for credit losses	$	5,848	$	17,583	$	9,175	$	5,391	$	2,419	$	4,118	$	575	$	45,109
Portfolio loans:
Individually evaluated for impairment (1)	$	—	$	11,469	$	2,844	$	—	$	—	$	—	$	—	$	14,313
Collectively evaluated for impairment		262,643		1,671,348		635,566		928,770		330,031		244,095		—		4,072,453
Total portfolio loans	$	262,643	$	1,682,817	$	638,410	$	928,770	$	330,031	$	244,095	$	—	$	4,086,766

⁽¹⁾  Commercial loans greater than $1 million that are reported as non-accrual or as troubled debt restructuring (“TDR”), including acquired with deteriorated credit quality, are individually evaluated for impairment.

WesBanco maintains an internal loan grading system to reflect the credit quality of commercial loans. Commercial loan risk grades are determined based on an evaluation of the relevant characteristics of each loan, assigned at the inception of each loan and adjusted thereafter at any time to reflect changes in the risk profile throughout the life of each loan. The primary factors used to determine the risk grade are the reliability and sustainability of the primary source of repayment and overall financial strength of the borrower. This includes an analysis of cash flow available to repay debt, profitability, liquidity, leverage, and overall financial trends. Other factors include management, industry or property type risks, an assessment of secondary sources of repayment such as collateral or guarantees, other terms and conditions of the loan that may increase or reduce its risk, and economic conditions and other external factors that may influence repayment capacity and financial condition.

Commercial real estate – land and construction consists of loans to finance investments in vacant land, land development, construction of residential housing, and construction of commercial buildings. Commercial real estate – improved property consists of loans for the purchase or refinance of all types of improved owner-occupied and investment properties. Factors that are considered in assigning the risk grade vary depending on the type of property financed. The risk grade assigned to construction and development loans is based on the overall viability of the project, the experience and financial capacity of the developer or builder to successfully complete the project, project specific and market absorption rates and comparable property values, and the amount of pre-sales for residential housing construction or pre-leases for commercial investment property. The risk grade assigned to commercial investment property loans is based primarily on the adequacy of net rental income generated by the property to service the debt, the type, quality, industry and mix of tenants, and the terms of leases, but also considers the overall financial capacity of the investors and their experience in owning and managing investment property. The risk grade assigned to owner-occupied commercial real estate and commercial and industrial loans is based primarily on historical and projected earnings, the adequacy of operating cash flow to service all of the business’ debt, and the capital resources, liquidity and leverage of the business, but also considers the industry in which the business operates, the business’ specific competitive advantages or disadvantages, the quality and experience of management, and external influences on the business such as economic conditions. Other factors that are considered for commercial and industrial loans include the type, quality and marketability of non-real estate collateral and whether the structure of the loan increases or reduces its risk. The type, age, condition, location and any environmental risks associated with a property are also considered for all types of commercial real estate. The overall financial condition and repayment capacity of any guarantors is also evaluated to determine the extent to which they mitigate other risks of the loan. The following paragraphs provide descriptions of risk grades that are applicable to commercial real estate and commercial and industrial loans.

Pass loans are those that exhibit a history of positive financial results that are at least comparable to the average for their industry or type of real estate. The primary source of repayment is acceptable and these loans are expected to perform satisfactorily during most economic cycles. Pass loans typically have no significant external factors that are expected to adversely affect these borrowers more than others in the same industry or property type. Any minor unfavorable characteristics of these loans are outweighed or mitigated by other positive factors including but not limited to adequate secondary or tertiary sources of repayment.

Criticized or compromised loans are currently protected but have weaknesses, which, if not corrected, may be inadequately protected at some future date. These loans represent an unwarranted credit risk and would generally not be extended in the normal course of lending. Specific issues which may warrant this grade include declining financial results, increased reliance on secondary sources of repayment or guarantor support and adverse external influences that may negatively impact the business or property.

Substandard and doubtful loans are equivalent to the classifications used by banking regulators. Substandard loans are inadequately protected by the current repayment capacity and equity of the borrower or collateral pledged, if any. Substandard loans have one or more well-defined weaknesses that jeopardize their repayment or collection in full. These loans may or may not be reported as non-accrual. Doubtful loans have all the weaknesses inherent to a substandard loan with the added characteristic that full repayment is highly questionable or improbable on the basis of currently existing facts, conditions and collateral values. However, recognition of loss may be deferred if there are reasonably specific pending factors that will reduce the risk if they occur.

The following tables summarize commercial loans by their assigned risk grade:

	Commerical Loans by Internally Assigned Risk Grade
(unaudited, in thousands)	Commercial Real Estate- Land and Construction		Commercial Real Estate- Improved Property		Commercial & Industrial		Total Commercial Loans
As of September 30, 2015
Pass	$	316,128	$	1,807,011	$	704,472	$	2,827,611
Criticized - compromised		8,170		13,895		10,188		32,253
Classified - substandard		2,456		35,678		11,070		49,204
Classified - doubtful		—		—		—		—
Total	$	326,754	$	1,856,584	$	725,730	$	2,909,068
As of December 31, 2014
Pass	$	257,218	$	1,627,771	$	617,742	$	2,502,731
Criticized - compromised		3,645		17,873		12,770		34,288
Classified - substandard		1,780		37,173		7,898		46,851
Classified - doubtful		—		—		—		—
Total	$	262,643	$	1,682,817	$	638,410	$	2,583,870

Residential real estate, home equity and consumer loans are not assigned internal risk grades other than as required by regulatory guidelines that are based primarily on the age of past due loans. WesBanco primarily evaluates the credit quality of residential real estate, home equity and consumer loans based on repayment performance and historical loss rates. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard in accordance with regulatory guidelines were $15.4 million at September 30, 2015 and $15.2 million at December 31, 2014, of which $2.8 and $2.2 million were accruing, for each period, respectively. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard are not included in the tables above.

Acquired Loans - Loans acquired in connection with acquisitions are recorded at their acquisition-date fair value in accordance with ASC 805, Business Combinations, with no carryover of related allowance for credit losses. Determining the fair value of the acquired loans involves estimating the principal and interest cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. Management considers a number of factors in evaluating the acquisition-date fair value including the remaining life of the acquired loans, delinquency status, estimated prepayments, payment options and other loan features, internal risk grade, estimated value of the underlying collateral and interest rate environment.

Loans acquired with deteriorated credit quality are accounted for in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality (ASC 310-30), and therefore impaired if, at acquisition, the loans have evidence of credit quality deterioration since origination and it is probable that all contractually required payments will not be collected. At acquisition, WesBanco considers several factors as indicators that an acquired loan has evidence of deterioration in credit quality. These factors include loans 90 days or more past due, loans with an internal risk grade of substandard or below, loans classified as non-accrual by the acquired institution, and loans that have been previously modified as a TDR.

Acquired loans that were not individually determined to be impaired are considered performing and are accounted for in accordance with ASC 310-20, Nonrefundable Fees and Other Costs (ASC 310-20), whereby the premium or discount derived from the fair market value adjustment, on a loan-by-loan or pooled basis, is recognized into interest income on a level yield over the remaining expected life of the loan or pool.

Under the ASC 310-30 model, the excess of cash flows expected to be collected at acquisition over recorded fair value is referred to as the accretable yield and is the interest component of expected cash flow. The accretable yield is recognized into income over the remaining life of the loan if the timing and/or amount of cash flows expected to be collected can be reasonably estimated. If the timing or amount of cash flows expected to be collected cannot be reasonably estimated, the cost recovery method of income recognition is used. The difference between the loan’s total scheduled principal and interest payments over all cash flows expected to be collected at acquisition, considering the impact of prepayments, is referred to as the non-accretable difference. The non-accretable difference represents contractually required principal and interest payments which WesBanco does not expect to collect.

Over the life of the loan, management continues to estimate cash flows expected to be collected. Decreases in expected cash flows are recognized as impairments through a charge to the provision for loan losses resulting in an increase in the allowance for loan losses. Subsequent improvements in cash flows result in first, reversal of existing valuation allowances recognized subsequent to acquisition, if any, and next, an increase in the amount of accretable yield to be subsequently recognized in interest income on a prospective basis over the loan’s remaining life.

In conjunction with the ESB acquisition, WesBanco acquired loans with a book value of $716.2 million. These loans were recorded at their fair value of $701.0 million, with $690.1 million categorized as performing. The fair market value adjustment on performing loans of $10.0 million at acquisition date is expected to be recognized into interest income on a level yield basis over the remaining expected life of the performing loans.

Loans acquired with deteriorated credit quality with a book value of $16.1 million and contractually required payments of $21.8 million were recorded at their estimated fair value of $10.9 million. The accretable yield on the acquired impaired loans was estimated at $1.9 million at the acquisition date with $1.4 million remaining at September 30, 2015. For the nine months ended September 30, 2015 accretion recognized in interest income on acquired impaired loans was $0.5 million. The balance of loans acquired with deteriorated credit quality at September 30, 2015, was $9.6 million, of which $8.3 million were categorized as non-accrual and $1.3 million were categorized as accruing TDRs, while the non-accretable difference was $9.0 million. At September 30, 2015 no allowance for loan losses has been recognized related to the acquired impaired loans.

The following tables summarize the age analysis of all categories of loans:

	Age Analysis of Loans
(unaudited, in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total Past Due		Total Loans		90 Days or More Past  Due and Accruing (1)
As of September 30, 2015
Commercial real estate:
Land and construction	$	322,921	$	—	$	14	$	3,819	$	3,833	$	326,754	$	2,528
Improved property		1,844,067		2,066		1,887		8,564		12,517		1,856,584		—
Total commercial real estate		2,166,988		2,066		1,901		12,383		16,350		2,183,338		2,528
Commercial and industrial		723,414		79		178		2,059		2,316		725,730		769
Residential real estate		1,230,877		1,419		3,031		8,303		12,753		1,243,630		1,888
Home equity		398,446		2,154		376		2,411		4,941		403,387		516
Consumer		389,776		3,342		971		468		4,781		394,557		378
Total portfolio loans		4,909,501		9,060		6,457		25,624		41,141		4,950,642		6,079
Loans held for sale		10,765		—		—		—		—		10,765		—
Total loans	$	4,920,266	$	9,060	$	6,457	$	25,624	$	41,141	$	4,961,407	$	6,079
Impaired loans included above are as follows:
Non-accrual loans	$	19,854	$	855	$	1,530	$	19,055	$	21,440	$	41,294
TDRs accruing interest (1)		10,830		503		207		490		1,200		12,030
Total impaired	$	30,684	$	1,358	$	1,737	$	19,545	$	22,640	$	53,324
As of December 31, 2014
Commercial real estate:
Land and construction	$	261,356	$	20	$	—	$	1,267	$	1,287	$	262,643	$	71
Improved property		1,665,363		961		4,772		11,721		17,454		1,682,817		—
Total commercial real estate		1,926,719		981		4,772		12,988		18,741		1,945,460		71
Commercial and industrial		634,482		1,834		240		1,854		3,928		638,410		22
Residential real estate		915,968		1,237		3,384		8,181		12,802		928,770		1,306
Home equity		325,291		1,877		895		1,968		4,740		330,031		570
Consumer		240,365		2,571		685		474		3,730		244,095		319
Total portfolio loans		4,042,825		8,500		9,976		25,465		43,941		4,086,766		2,288
Loans held for sale		5,865		—		—		—		—		5,865		—
Total loans	$	4,048,690	$	8,500	$	9,976	$	25,465	$	43,941	$	4,092,631	$	2,288
Impaired loans included above are as follows:
Non-accrual loans	$	7,562	$	2,884	$	5,552	$	22,820	$	31,256	$	38,818
TDRs accruing interest (1)		11,016		151		542		357		1,050		12,066
Total impaired	$	18,578	$	3,035	$	6,094	$	23,177	$	32,306	$	50,884

⁽¹⁾ Loans 90 days or more past due and accruing interest exclude TDRs 90 days or more past due and accruing interest.

Impaired Loans — A loan is considered impaired, based on current information and events, if it is probable that WesBanco will be unable to collect the payments of principal and interest when due according to the contractual terms of the loan agreement. Impaired loans generally included all non-accrual loans and TDRs.

Loans are generally placed on non-accrual when they are 90 days past due unless the loan is well-secured and in the process of collection. Loans may also be placed on non-accrual when full collection of principal is in doubt even if payments on such loans remain current, or may remain on non-accrual if they were past due but subsequently brought current.

Loans are categorized as TDRs when the Bank, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that it would not otherwise consider.

Acquired loans that have experienced a deterioration of credit quality from origination to acquisition for which it is probable that WesBanco will be unable to collect all contractually-required payments receivable, including both principal and interest, are considered impaired.

The following tables summarize impaired loans:

	Impaired Loans
	September 30, 2015						December 31, 2014
(unaudited, in thousands)	Unpaid Principal Balance (1)		Recorded Investment		Related Allowance		Unpaid Principal Balance (1)		Recorded Investment		Related Allowance
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	2,485	$	2,319	$	—	$	1,588	$	1,488	$	—
Improved property		24,277		17,234		—		16,480		14,684		—
Commercial and industrial		3,608		2,924		—		3,152		2,597		—
Residential real estate		18,736		17,048		—		20,077		18,544		—
Home equity		3,689		3,310		—		2,890		2,663		—
Consumer		1,421		1,095		—		1,287		1,086		—
Total impaired loans without a specific allowance		54,216		43,930		—		45,474		41,062		—
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—		—		—		—		—
Improved property		5,719		4,510		1,152		7,980		7,980		2,765
Commercial and industrial		6,188		4,884		1,498		1,842		1,842		1,033
Total impaired loans with a specific allowance		11,907		9,394		2,650		9,822		9,822		3,798
Total impaired loans	$	66,123	$	53,324	$	2,650	$	55,296	$	50,884	$	3,798

⁽¹⁾ The difference between the unpaid principal balance and the recorded investment generally reflects amounts that have been previously charged-off and fair market value adjustments on acquired impaired loans.

	Impaired Loans
	For the Three Months Ended										For the Nine Months Ended
	September 30, 2015					September 30, 2014					September 30, 2015				September 30, 2014
	Average		Interest			Average		Interest			Average		Interest		Average		Interest
	Recorded		Income			Recorded		Income			Recorded		Income		Recorded		Income
(unaudited, in thousands)	Investment		Recognized			Investment		Recognized			Investment		Recognized		Investment		Recognized
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	2,414	$	12		$	1,749	$	11		$	2,198	$	30	$	2,099	$	26
Improved property		19,118		245			17,672		169			18,850		708		18,415		322
Commercial and industrial		3,193		37			4,071		(2	)		2,854		99		3,802		87
Residential real estate		17,508		200			18,337		219			18,173		665		18,900		610
Home equity		3,153		34			2,191		13			2,896		75		2,279		48
Consumer		1,142		27			1,087		26			1,176		73		1,131		72
Total impaired loans without a specific allowance		46,528		555			45,107		436			46,147		1,650		46,626		1,165
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—			—		—			—		—		—		—
Improved property		6,011		(56	)		2,269		109			6,617		—		1,499		113
Commercial and industrial		4,707		63			1,938		27			3,256		200		2,134		68
Total impaired loans with a specific allowance		10,718		7			4,207		136			9,873		200		3,633		181
Total impaired loans	$	57,246	$	562		$	49,314	$	572		$	56,020	$	1,850	$	50,259	$	1,346

The following tables present the recorded investment in non-accrual loans and TDRs:

	Non-accrual Loans (1)
	September 30,		December 31,
(unaudited, in thousands)	2015		2014
Commercial real estate:
Land and construction	$	1,369	$	1,488
Improved property		19,732		20,227
Total commercial real estate		21,101		21,715
Commercial and industrial		7,591		4,110
Residential real estate		9,331		10,329
Home equity		2,643		1,923
Consumer		628		741
Total	$	41,294	$	38,818

⁽¹⁾  Total non-accrual loans include loans that are also restructured. Such loans are also set forth in the following table as non-accrual TDRs.

	TDRs
	September 30, 2015						December 31, 2014
(unaudited, in thousands)	Accruing		Non- Accrual		Total		Accruing		Non- Accrual		Total
Commercial real estate:
Land and construction	$	950	$	509	$	1,459	$	—	$	464	$	464
Improved property		2,012		9,615		11,627		2,437		1,850		4,287
Total commercial real estate		2,962		10,124		13,086		2,437		2,314		4,751
Commercial and industrial		217		242		459		329		478		807
Residential real estate		7,717		1,826		9,543		8,215		2,074		10,289
Home equity		667		271		938		740		245		985
Consumer		467		198		665		345		309		654
Total	$	12,030	$	12,661	$	24,691	$	12,066	$	5,420	$	17,486

As of September 30, 2015, there were two TDRs greater than $1.0 million. The concessions granted in the majority of loans reported as accruing and non-accrual TDRs are extensions of the maturity date or the amortization period, reductions in the interest rate below the prevailing market rate for loans with comparable characteristics, and/or permitting interest-only payments for longer than three months.

Total TDRs at September 30, 2015 include $9.3 million from the ESB acquisition with $1.3 million accruing and $8.0 million on non-accrual.

The following table presents details related to loans identified as TDRs during the three and nine months ended September 30, 2015 and 2014, respectively:

	New TDRs (1)
	For the Three Months Ended
	September 30, 2015						September 30, 2014
			Pre-		Post-				Pre-		Post-
			Modification		Modification				Modification		Modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(unaudited, dollars in thousands)	Modifications		Investment		Investment		Modifications		Investment		Investment
Commercial real estate:
Land and construction		1	$	13	$	12		—	$	—	$	—
Improved Property		—		—		—		2		475		465
Total commercial real estate		1		13		12		2		475		465
Commercial and industrial		—		—		—		—		—		—
Residential real estate		—		—		—		1		112		112
Home equity		—		—		—		1		58		57
Consumer		—		—		—		2		52		50
Total		1	$	13	$	12		6	$	697	$	684

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

	New TDRs (1)
	For the Nine Months Ended
	September 30, 2015						September 30, 2014
			Pre-		Post-				Pre-		Post-
			Modification		Modification				Modification		Modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(unaudited, dollars in thousands)	Modifications		Investment		Investment		Modifications		Investment		Investment
Commercial real estate:
Land and construction		8	$	1,065	$	1,002		—	$	—	$	—
Improved property		7		9,336		8,541		4		692		664
Total commercial real estate		15		10,401		9,543		4		692		664
Commercial and industrial		2		42		50		—		—		—
Residential real estate		8		466		447		5		286		278
Home equity		1		7		6		1		59		57
Consumer		19		279		267		12		191		163
Total		45	$	11,195	$	10,313		22	$	1,228	$	1,162

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

The following tables summarize TDRs which defaulted (defined as past due 90 days) during the three and nine months ended September 30, 2015 and 2014, respectively, that were restructured within the last twelve months prior to September 30, 2015 and 2014, respectively:

	Defaulted TDRs (1)
	For the Three Months Ended
	September 30, 2015				September 30, 2014
	Number of		Recorded		Number of		Recorded
(unaudited, dollars in thousands)	Defaults		Investment		Defaults		Investment
Commercial real estate:
Land and construction		—	$	—		—	$	—
Improved property		—		—		—		—
Total commercial real estate		—		—		—		—
Commercial and industrial		—		—		—		—
Residential real estate		—		—		—		—
Home equity		—		—		—		—
Consumer		1		20		—		—
Total		1	$	20		—	$	—

⁽¹⁾  Excludes loans that were either charged-off or cured by period end. The recorded investment is as of September 30, 2015 and 2014, respectively.

	Defaulted TDRs (1)
	For the Nine Months Ended
	September 30, 2015				September 30, 2014
	Number of		Recorded		Number of		Recorded
(unaudited, dollars in thousands)	Defaults		Investment		Defaults		Investment
Commercial real estate:
Land and construction		—	$	—		—	$	—
Improved property		—		—		—		—
Total commercial real estate		—		—		—		—
Commercial and industrial		—		—		—		—
Residential real estate		—		—		1		45
Home equity		1		42		—		—
Consumer		1		20		—		—
Total		2	$	62		1	$	45

⁽¹⁾  Excludes loans that were either charged-off or cured by period end. The recorded investment is as of September 30, 2015 and 2014, respectively.

TDRs that defaulted during the nine month period that were restructured within the last twelve months represented less than 1.0% of the total TDR balance at September 30, 2015. These loans are placed on non-accrual status unless they are both well-secured and in the process of collection. At September 30, 2015, the loans in the table above were not accruing interest.

The following table summarizes other real estate owned and repossessed assets included in other assets:

	September 30,		December 31,
(unaudited, in thousands)	2015		2014
Other real estate owned	$	5,967	$	4,920
Repossessed assets		95		162
Total other real estate owned and repossessed assets	$	6,062	$	5,082

Residential real estate included in other real estate owned at September 30, 2015 and December 31, 2014 was $2.0 million and $0.6 million, respectively. At September 30, 2015, formal foreclosure proceedings were in process on residential real estate loans totaling $3.8 million.

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Securities

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Securities

NOTE 4. SECURITIES

The following table presents the fair value and amortized cost of available-for-sale and held-to-maturity securities:

	September 30, 2015									December 31, 2014
(unaudited, in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-sale
Obligations of government agencies	$	79,390	$	1,433	$	(14	)	$	80,809	$	86,964	$	1,087	$	(315	)	$	87,736
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,248,057		6,767		(4,376	)		1,250,448		703,535		4,336		(6,758	)		701,113
Obligations of states and political subdivisions		85,523		4,830		(44	)		90,309		86,073		5,365		(5	)		91,433
Corporate debt securities		127,201		318		(170	)		127,349		25,974		141		(119	)		25,996
Total debt securities	$	1,540,171	$	13,348	$	(4,604	)	$	1,548,915	$	902,546	$	10,929	$	(7,197	)	$	906,278
Equity securities		10,106		697		—			10,803		10,304		842		—			11,146
Total available-for-sale securities	$	1,550,277	$	14,045	$	(4,604	)	$	1,559,718	$	912,850	$	11,771	$	(7,197	)	$	917,424
Held-to-maturity
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies	$	161,495	$	2,848	$	(358	)	$	163,985	$	79,004	$	3,262	$	(246	)	$	82,020
Obligations of states and political subdivisions		766,423		25,359		(1,336	)		790,446		507,927		23,917		(1,043	)		530,801
Corporate debt securities		29,434		183		(51	)		29,566		6,739		106		(49	)		6,796
Total held-to-maturity securities	$	957,352	$	28,390	$	(1,745	)	$	983,997	$	593,670	$	27,285	$	(1,338	)	$	619,617
Total securities	$	2,507,629	$	42,435	$	(6,349	)	$	2,543,715	$	1,506,520	$	39,056	$	(8,535	)	$	1,537,041

At September 30, 2015, and December 31, 2014, there were no holdings of any one issuer, other than the U.S. government and its agencies, in an amount greater than 10% of WesBanco’s shareholders’ equity.

The following table presents the fair value of available-for-sale and held-to-maturity securities by contractual maturity at September 30, 2015. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date.

	September 30, 2015
(unaudited, in thousands)	One Year or less		One to Five Years		Five to Ten Years		After Ten Years		Mortgage-backed and Equity		Total
Available-for-sale
Obligations of government agencies	$	—	$	20,000	$	39,115	$	21,694	$	—	$	80,809
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies (1)		—		—		—		—		1,250,448		1,250,448
Obligations of states and political subdivisions		7,286		26,827		33,021		23,175		—		90,309
Corporate debt securities		49,777		61,384		14,251		1,937		—		127,349
Equity securities (2)		—		—		—		—		10,803		10,803
Total available-for-sale securities	$	57,063	$	108,211	$	86,387	$	46,806	$	1,261,251	$	1,559,718
Held-to-maturity (3)
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies (1)	$	—	$	—	$	—	$	—	$	163,985	$	163,985
Obligations of states and political subdivisions		1,863		34,159		342,764		411,660		—		790,446
Corporate debt securities		—		1,010		24,616		3,940		—		29,566
Total held-to-maturity securities	$	1,863	$	35,169	$	367,380	$	415,600	$	163,985	$	983,997
Total securities	$	58,926	$	143,380	$	453,767	$	462,406	$	1,425,236	$	2,543,715

⁽¹⁾  Mortgage-backed and collateralized mortgage securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds.

⁽²⁾ Equity securities, which have no stated maturity, are not assigned a maturity category.

⁽³⁾ The held-to-maturity portfolio is carried at an amortized cost of $957.4 million.

Securities with aggregate fair values of $1.1 billion and $706.5 million at September 30, 2015 and December 31, 2014, respectively, were pledged as security for public and trust funds, and securities sold under agreements to repurchase. Proceeds from the sale of available-for-sale securities were $570.7 million, primarily due to the ESB portfolio restructuring, and $4.8 million for the nine months ended September 30, 2015 and 2014, respectively. Net unrealized gains on available-for-sale securities included in accumulated other comprehensive income net of tax, as of September 30, 2015 and December 31, 2014 were $6.0 million and $2.9 million, respectively.

The following table presents the gross realized gains and losses on sales and calls of securities for the three and nine months ended September 30, 2015 and 2014, respectively.

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
(unaudited, in thousands)	2015			2014			2015			2014
Gross realized gains	$	48		$	602		$	74		$	967
Gross realized losses		(1	)		(21	)		(5	)		(211	)
Net realized gains (losses)	$	47		$	581		$	69		$	756

The following tables provide information on unrealized losses on investment securities that have been in an unrealized loss position for less than twelve months and twelve months or more as of September 30, 2015 and December 31, 2014:

	September 30, 2015
	Less than 12 months							12 months or more							Total
(unaudited, dollars in thousands)	Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities
Obligations of government agencies	$	12,986	$	(14	)		2	$	—	$	—			—	$	12,986	$	(14	)		2
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		430,580		(1,753	)		73		145,652		(2,981	)		31		576,232		(4,734	)		104
Obligations of states and political subdivisions		120,249		(941	)		166		20,601		(439	)		30		140,850		(1,380	)		196
Corporate debt securities		71,958		(172	)		22		1,937		(49	)		1		73,895		(221	)		23
Total temporarily impaired securities	$	635,773	$	(2,880	)		263	$	168,190	$	(3,469	)		62	$	803,963	$	(6,349	)		325
	December 31, 2014
	Less than 12 months							12 months or more							Total
(unaudited, dollars in thousands)	Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities
Obligations of government agencies	$	19,362	$	(77	)		5	$	19,757	$	(238	)		4	$	39,119	$	(315	)		9
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		78,786		(386	)		19		240,055		(6,618	)		43		318,841		(7,004	)		62
Obligations of states and political subdivisions		12,615		(96	)		15		61,548		(952	)		93		74,163		(1,048	)		108
Corporate debt securities		2,969		(31	)		1		4,573		(137	)		2		7,542		(168	)		3
Total temporarily impaired securities	$	113,732	$	(590	)		40	$	325,933	$	(7,945	)		142	$	439,665	$	(8,535	)		182

Unrealized losses on debt securities in the tables represent temporary fluctuations resulting from changes in market rates in relation to fixed yields. Unrealized losses in the available-for-sale portfolio are accounted for as an adjustment, net of taxes, to other comprehensive income in shareholders’ equity.

WesBanco does not believe the securities presented above are impaired due to reasons of credit quality, as there are no debt securities rated below investment grade and all are paying principal and interest according to their contractual terms. WesBanco does not intend to sell, nor is it more likely than not that it will be required to sell, loss position securities prior to recovery of their cost, and therefore, management believes the unrealized losses detailed above are temporary and no impairment loss relating to these securities has been recognized.

Securities that do not have readily determinable fair values and for which WesBanco does not exercise significant influence are carried at cost. Cost method investments consist primarily of FHLB of Pittsburgh and FHLB of Cincinnati stock totaling $39.5 million and $11.6 million at September 30, 2015 and December 31, 2014, respectively, and are included in other assets in the Consolidated Balance Sheets. Cost method investments are evaluated for impairment whenever events or circumstances suggest that their carrying value may not be recoverable.

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Pension Plan (Tables)

9 Months Ended

Sep. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Pension Cost

The following table presents the net periodic pension cost for WesBanco’s Defined Benefit Pension Plan (the “Plan”) and the related components:

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
(unaudited, in thousands)	2015			2014			2015			2014
Service cost – benefits earned during year	$	846		$	734		$	2,509		$	2,176
Interest cost on projected benefit obligation		1,228			1,196			3,643			3,549
Expected return on plan assets		(1,950	)		(1,822	)		(5,785	)		(5,407	)
Amortization of prior service cost		7			11			19			33
Amortization of net loss		801			370			2,378			1,100
Net periodic pension cost	$	932		$	489		$	2,764		$	1,451

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Mergers and Acquisitions (Tables)

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Calculation of Purchase Price and Resulting Goodwill Relating to ESB Acquisition

The purchase price of the ESB acquisition and resulting goodwill is summarized as follows:

(unaudited, in thousands)	February 10, 2015
Purchase Price:
Fair value of WesBanco shares issued, (net of equity issuance costs of $0.1 million)	$	293,933
Cash consideration for outstanding ESB shares, options and restricted stock		37,036
Settlement of pre-existing loan to ESB		8,000
Total purchase price	$	338,969
Fair value of:
Tangible assets acquired	$	1,858,014
Core deposit and other intangible assets acquired		5,346
Liabilities assumed		(1,702,554	)
Net cash received in the acquisition		8,485
Fair value of net assets acquired		169,291
Goodwill recognized	$	169,678

Summary of Fair Value of Net Assets that Wesbanco Acquired from ESB

The following table presents the preliminary allocation of the purchase price of the assets acquired and the liabilities assumed at the date of acquisition, as WesBanco intends to finalize its accounting for the acquisition of ESB during 2015:

(unaudited, in thousands)	February 10, 2015
Assets
Cash and due from banks	$	8,485
Securities		486,891
Loans		700,964
Goodwill and other intangible assets		175,023
Accrued income and other assets (1)		670,160
Total Assets	$	2,041,523
Liabilities
Deposits	$	1,246,992
Borrowings		433,454
Accrued expenses and other liabilities		22,108
Total liabilities		1,702,554
Purchase price	$	338,969

⁽¹⁾ Includes receivables of $560.7 million from the sale of available-for-sale securities prior to the acquisition date.

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Comprehensive Income

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Comprehensive Income

NOTE 8. COMPREHENSIVE INCOME

The activity in accumulated other comprehensive income for the nine months ended September 30, 2015 and 2014 is as follows:

	Accumulated Other Comprehensive Income (1)
(unaudited, in thousands)	Defined Benefit Pension Plan			Unrealized Gains (Losses) on Securities Available-for-Sale			Unrealized Gains on Securities Transferred from Available-for- Sale to Held-to-Maturity			Total
Balance at December 31, 2014	$	(22,776	)	$	2,892		$	1,059		$	(18,825	)
Other comprehensive income before reclassifications		—			3,105			—			3,105
Amounts reclassified from accumulated other comprehensive income		1,493			(20	)		(199	)		1,274
Period change		1,493			3,085			(199	)		4,379
Balance at September 30, 2015	$	(21,283	)	$	5,977		$	860		$	(14,446	)
Balance at December 31, 2013	$	(7,966	)	$	(6,126	)	$	1,358		$	(12,734	)
Other comprehensive income before reclassifications		—			5,344			—			5,344
Amounts reclassified from accumulated other comprehensive income		716			(525	)		(224	)		(33	)
Period change		716			4,819			(224	)		5,311
Balance at September 30, 2014	$	(7,250	)	$	(1,307	)	$	1,134		$	(7,423	)

⁽¹⁾  All amounts are net of tax. Related income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 37%.

The following table provides details about amounts reclassified from accumulated other comprehensive income for the three and nine months ended September 30, 2015 and 2014:

Details about Accumulated Other Comprehensive Income Components	For the Three Months Ended September 30,						For the Nine Months Ended September 30,						Affected Line Item in the Statement of Net Income
(unaudited, in thousands)	2015			2014			2015			2014
Securities available-for-sale (1):
Net securities gains reclassified into earnings	$	(11	)	$	(583	)	$	(32	)	$	(831	)	Net securities gains (Non-interest income)
Related income tax expense		4			214			12			306		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		(7	)		(369	)		(20	)		(525	)
Securities held-to-maturity (1):
Amortization of unrealized gain transferred from available-for-sale		(104	)		(84	)		(317	)		(354	)	Interest and dividends on securities (Interest and dividend income)
Related income tax expense		38			31			118			130		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		(66	)		(53	)		(199	)		(224	)
Defined benefit pension plan (2):
Amortization of net loss and prior service costs		808			382			2,397			1,134		Employee benefits (Non-interest expense)
Related income tax benefit		(296	)		(140	)		(904	)		(418	)	Provision for income taxes
Net effect on accumulated other comprehensive income for the period		512			242			1,493			716
Total reclassifications for the period	$	439		$	(180	)	$	1,274		$	(33	)

⁽¹⁾ For additional detail related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income see Note 4, “Securities.”

⁽²⁾ Included in the computation of net periodic pension cost. See Note 6, “Pension Plan” for additional detail.

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Comprehensive Income - Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Beginning Balance, Defined Benefit Pension Plan	$ (22,776)	$ (7,966)
Defined Benefit Pension Plan, Other comprehensive income before reclassifications	0	0
Defined Benefit Pension Plan, Amounts reclassified from accumulated other comprehensive income	1,493	716
Defined Benefit Pension Plan, Period change	1,493	716
Ending Balance, Defined Benefit Pension Plan	(21,283)	(7,250)
Beginning Balance, Unrealized Gains (Losses) on Securities Available-for-Sale	2,892	(6,126)
Unrealized Gains (Losses) on Securities Available-for-Sale, Other comprehensive income before reclassifications	3,105	5,344
Unrealized Gains (Losses) on Securities Available-for-Sale, Amounts reclassified from accumulated other comprehensive income	(20)	(525)
Net effect on accumulated other comprehensive income for the period	3,085	4,819
Ending Balance, Unrealized Gains (Losses) on Securities Available-for-Sale	5,977	(1,307)
Beginning Balance, Unrealized Gains on Securities Transferred from Available-for-Sale to Held-to-Maturity	1,059	1,358
Unrealized Gains on Securities Transferred from Available-for-Sale to Held-to-Maturity, Other comprehensive income before reclassifications	0	0
Unrealized Gains on Securities Transferred from Available-for-Sale to Held-to-Maturity, Amounts reclassified from accumulated other comprehensive income	(199)	(224)
Unrealized Gains on Securities Transferred from Available-for-Sale to Held-to-Maturity, Period change	(199)	(224)
Ending Balance, Unrealized Gains on Securities Transferred from Available-for-Sale to Held-to-Maturity	860	1,134
Beginning Balance, Accumulated Other Comprehensive Income	(18,825)	(12,734)
Other comprehensive income before reclassifications	3,105	5,344
Amounts reclassified from accumulated other comprehensive income	1,274	(33)
Total other comprehensive income	4,379	5,311
Ending Balance, Accumulated Other Comprehensive Income	$ (14,446)	$ (7,423)

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Pension Plan

9 Months Ended

Sep. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Pension Plan

NOTE 6. PENSION PLAN

The following table presents the net periodic pension cost for WesBanco’s Defined Benefit Pension Plan (the “Plan”) and the related components:

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
(unaudited, in thousands)	2015			2014			2015			2014
Service cost – benefits earned during year	$	846		$	734		$	2,509		$	2,176
Interest cost on projected benefit obligation		1,228			1,196			3,643			3,549
Expected return on plan assets		(1,950	)		(1,822	)		(5,785	)		(5,407	)
Amortization of prior service cost		7			11			19			33
Amortization of net loss		801			370			2,378			1,100
Net periodic pension cost	$	932		$	489		$	2,764		$	1,451

The Plan covers all employees of WesBanco and its subsidiaries who were hired on or before August 1, 2007 who satisfy minimum age and length of service requirements, and is not available to employees hired after such date.

A minimum required contribution of $3.1 million was due for 2015 which could have been offset by the Plan’s $34.9 million available credit balance. A voluntary contribution of $3.5 million was made in June 2015.

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Fair Value Measurement

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurement

NOTE 7. FAIR VALUE MEASUREMENT

Fair value estimates are based on quoted market prices, if available, quoted market prices of similar assets or liabilities, or the present value of expected future cash flows and other valuation techniques. These valuations are significantly affected by discount rates, cash flow assumptions, and risk assumptions used. Therefore, fair value estimates may not be substantiated by comparison to independent markets and are not intended to reflect the proceeds that may be realizable in an immediate settlement of the instruments.

Fair value is determined at one point in time and is not representative of future value. These amounts do not reflect the total value of a going concern organization. Management does not have the intention to dispose of a significant portion of its assets and liabilities and therefore, the unrealized gains or losses should not be interpreted as a forecast of future earnings and cash flows.

The following is a discussion of assets and liabilities measured at fair value on a recurring basis and valuation techniques applied:

Securities available-for-sale: The fair value of securities available-for-sale which are measured on a recurring basis are determined primarily by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other similar securities. These securities are classified within level 1 or 2 in the fair value hierarchy. Certain equity securities that are lightly traded in over-the-counter markets are classified as level 2 in the fair value hierarchy, as quoted market prices may not be available on the fair value measurement date. Positions that are not traded in active markets for which valuations are generated using assumptions not observable in the market or management’s best estimate are classified within level 3 of the fair value hierarchy. This includes certain specific municipal debt issues for which the credit quality and discount rate must be estimated.

We may be required from time to time to measure certain assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from application of lower of cost or market accounting or write-downs of individual assets.

Impaired loans: Impaired loans are carried at the lower of cost or the fair value of the collateral for collateral-dependent loans. Collateral may be in the form of real estate or business assets including equipment, inventory and accounts receivable. The use of independent appraisals, discounted cash flow models and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral and impaired loans are therefore classified within level 3 of the fair value hierarchy.

Other real estate owned and repossessed assets: Other real estate owned and repossessed assets are carried at the lower of the investment in the assets or the fair value of the assets less estimated selling costs. The use of independent appraisals and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral, and therefore other real estate owned and repossessed assets are classified within level 3 of the fair value hierarchy.

Loans held for sale: Loans held for sale are carried, in aggregate, at the lower of cost or fair value. The use of a valuation model using quoted prices of similar instruments are significant inputs in arriving at the fair value and therefore loans held for sale are classified within level 2 of the fair value hierarchy.

The following tables set forth WesBanco’s financial assets and liabilities that were accounted for at fair value on a recurring and nonrecurring basis by level within the fair value hierarchy as of September 30, 2015 and December 31, 2014:

			September 30, 2015
			Fair Value Measurements Using:
(unaudited, in thousands)	September 30, 2015		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Recurring fair value measurements
Securities - available-for-sale
Obligations of government agencies	$	80,809	$	—	$	80,809	$	—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,250,448		—		1,250,448		—
Obligations of state and political subdivisions		90,309		—		90,309		—
Corporate debt securities		127,349		—		127,349		—
Equity securities		10,803		7,844		2,959		—
Total securities - available-for-sale	$	1,559,718	$	7,844	$	1,551,874	$	—
Total recurring fair value measurements	$	1,559,718	$	7,844	$	1,551,874	$	—
Nonrecurring fair value measurements
Impaired loans	$	6,744	$	—	$	—	$	6,744
Other real estate owned and repossessed assets		6,062		—		—		6,062
Loans held for sale		10,765		—		10,765		—
Total nonrecurring fair value measurements	$	23,571	$	—	$	10,765	$	12,806
			December 31, 2014
			Fair Value Measurements Using:
(unaudited, in thousands)	December 31, 2014		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Recurring fair value measurements
Securities - available-for-sale
Obligations of government agencies	$	87,736	$	—	$	87,736	$	—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		701,113		—		701,113		—
Obligations of state and political subdivisions		91,433		—		91,433		—
Corporate debt securities		25,996		—		25,996		—
Equity securities		11,146		8,440		2,706		—
Total securities - available-for-sale	$	917,424	$	8,440	$	908,984	$	—
Total recurring fair value measurements	$	917,424	$	8,440	$	908,984	$	—
Nonrecurring fair value measurements
Impaired loans	$	6,024	$	—	$	—	$	6,024
Other real estate owned and repossessed assets		5,082		—		—		5,082
Loans held for sale		5,865		—		5,865		—
Total nonrecurring fair value measurements	$	16,971	$	—	$	5,865	$	11,106

WesBanco’s policy is to recognize transfers between levels as of the actual date of the event or change in circumstances that caused the transfer. There were no transfers between level 1, 2 or 3 for the nine months ended September 30, 2015 or 2014.

The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which WesBanco has utilized level 3 inputs to determine fair value:

	Quantitative Information about Level 3 Fair Value Measurements
(unaudited, in thousands)	Fair Value Estimate		Valuation Techniques	Unobservable Input	Range (Weighted Average)
September 30, 2015:
Impaired loans	$	6,744	Appraisal of collateral (1)	Appraisal adjustments (2)	0% to (39.1%) / (20.3%)
				Liquidation expenses (2)	(3.1%) to (8.0%) / (6.9%)
Other real estate owned and repossessed assets		6,062	Appraisal of collateral (1), (3)
December 31, 2014:
Impaired loans	$	6,024	Appraisal of collateral (1)	Appraisal adjustments (2)	0% to (39.7%) / (6.7%)
				Liquidation expenses (2)	(1.2%) to (8.0%) / (6.7%)
Other real estate owned and repossessed assets		5,082	Appraisal of collateral (1), (3)

⁽¹⁾ Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.

⁽²⁾  Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of appraisal adjustments and liquidation expenses are presented as a percent of the appraisal.

⁽³⁾  Includes estimated liquidation expenses and numerous dissimilar qualitative adjustments by management which are not identifiable.

The estimated fair values of WesBanco’s financial instruments are summarized below:

					Fair Value Measurements at September 30, 2015
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Financial Assets
Cash and due from banks	$	92,975	$	92,975	$	92,975	$	—	$	—
Securities available-for-sale		1,559,718		1,559,718		7,844		1,551,874		—
Securities held-to-maturity		957,352		983,997		—		983,280		717
Net loans		4,909,018		4,849,478		—		—		4,849,478
Loans held for sale		10,765		10,765		—		10,765		—
Accrued interest receivable		27,000		27,000		27,000		—		—
Bank-owned life insurance		155,894		155,894		155,894		—		—
Financial Liabilities
Deposits		6,193,902		6,203,633		4,563,012		1,640,621		—
Federal Home Loan Bank borrowings		893,117		895,641		—		895,641		—
Other borrowings		84,587		84,590		81,744		2,846		—
Junior subordinated debt		106,196		76,865		—		76,865		—
Accrued interest payable		2,832		2,832		2,832		—		—
					Fair Value Measurements at December 31, 2014
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)
Financial Assets
Cash and due from banks	$	94,002	$	94,002	$	94,002	$	—	$	—
Securities available-for-sale		917,424		917,424		8,440		908,984		—
Securities held-to-maturity		593,670		619,617		—		618,895		722
Net loans		4,042,112		4,047,648		—		—		4,047,648
Loans held for sale		5,865		5,865		—		5,865		—
Accrued interest receivable		18,481		18,481		18,481		—		—
Bank-owned life insurance		123,298		123,298		123,298		—		—
Financial Liabilities
Deposits		5,048,983		5,056,828		3,743,887		1,312,941		—
Federal Home Loan Bank borrowings		223,126		225,456		—		225,456		—
Other borrowings		80,690		80,696		77,534		3,162		—
Junior subordinated debt		106,176		79,212		—		79,212		—
Accrued interest payable		1,620		1,620		1,620		—		—

The following methods and assumptions were used to measure the fair value of financial instruments recorded at cost on WesBanco’s consolidated balance sheets:

Cash and due from banks: The carrying amount for cash and due from banks is a reasonable estimate of fair value.

Securities held-to-maturity: Fair values for securities held-to-maturity are determined in the same manner as securities available-for-sale which is described above.

Net loans: Fair values for loans are estimated using a discounted cash flow methodology. The discount rates take into account interest rates currently being offered to customers for loans with similar terms, the credit risk associated with the loan and other market factors, including liquidity. The valuation of the loan portfolio reflects discounts that WesBanco believes are consistent with transactions occurring in the marketplace for both performing and distressed loan types. The carrying value that fair value is compared to is net of the allowance for loan losses and other associated premiums and discounts. Due to the significant judgment involved in evaluating credit quality, loans are classified within level 3 of the fair value hierarchy.

Accrued interest receivable: The carrying amount of accrued interest receivable approximates its fair value.

Bank-owned life insurance: The carrying value of bank-owned life insurance represents the net cash surrender value of the underlying insurance policies, should these policies be terminated. Management believes that the carrying value approximates its fair value.

Deposits: The carrying amount is considered a reasonable estimate of fair value for demand, savings and other variable rate deposit accounts. The fair value of fixed maturity certificates of deposit is estimated by a discounted cash flow method using rates currently offered for deposits of similar remaining maturities.

Federal Home Loan Bank borrowings: The fair value of FHLB borrowings is based on rates currently available to WesBanco for borrowings with similar terms and remaining maturities.

Other borrowings: The carrying amount of federal funds purchased and overnight sweep accounts generally approximate fair value. Other repurchase agreements are based on quoted market prices if available. If market prices are not available, for certain fixed and adjustable rate repurchase agreements, then quoted market prices of similar instruments are used.

Junior subordinated debt owed to unconsolidated subsidiary trusts: Due to the pooled nature of these instruments, which are not actively traded, estimated fair value is based on recent similar transactions of single-issuer trust preferred securities.

Accrued interest payable: The carrying amount of accrued interest payable approximates its fair value.

Off-balance sheet financial instruments: Off-balance sheet financial instruments consist of commitments to extend credit, including letters of credit. Fair values for commitments to extend credit are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present credit standing of the counterparties. The estimated fair value of the commitments to extend credit and letters of credit are insignificant and therefore are not presented in the above tables.

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Commitments and Contingent Liabilities

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingent Liabilities

NOTE 9. COMMITMENTS AND CONTINGENT LIABILITIES

Commitments — In the normal course of business, WesBanco offers off-balance sheet credit arrangements to enable its customers to meet their financing objectives. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. WesBanco’s exposure to credit losses in the event of non-performance by the other parties to the financial instruments for commitments to extend credit and standby letters of credit is limited to the contractual amount of those instruments. WesBanco uses the same credit policies in making commitments and conditional obligations as for all other lending. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The allowance for credit losses associated with commitments was $0.6 million and $0.5 million as of September 30, 2015 and December 31, 2014, respectively, and is included in other liabilities on the Consolidated Balance Sheets.

Letters of credit are conditional commitments issued by banks to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements, including normal business activities, bond financing and similar transactions. Letters of credit are considered guarantees. The liability associated with letters of credit was $0.2 million as of both September 30, 2015 and December 31, 2014.

Contingent obligations to purchase loans funded by other entities include affordable housing plan guarantees and credit card guarantees. Affordable housing plan guarantees are performance guarantees for various building project loans. The guarantee amortizes as the loan balances decrease. Credit card guarantees are credit card balances not owned by WesBanco, whereby the Bank guarantees the performance of the cardholder.

The following table presents total commitments to extend credit, guarantees and various letters of credit outstanding:

	September 30,		December 31,
(unaudited, in thousands)	2015		2014
Lines of credit	$	1,162,715	$	984,352
Loans approved but not closed		283,912		116,757
Overdraft limits		106,025		95,965
Letters of credit		27,605		23,362
Contingent obligations to purchase loans funded by other entities		9,256		8,312

Contingent Liabilities — WesBanco is a party to various legal and administrative proceedings and claims. While any litigation contains an element of uncertainty, management does not believe that a material loss related to such proceedings or claims pending or known to be threatened is reasonably possible.

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Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Lines of credit	$ 1,162,715	$ 984,352
Loans approved but not closed	283,912	116,757
Overdraft limits	106,025	95,965
Letters of credit	27,605	23,362
Contingent obligations to purchase loans funded by other entities	$ 9,256	$ 8,312

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Business Segments - Financial Information by Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Interest income	$ 66,935	$ 54,303	$ 194,052	$ 161,805
Interest expense	6,326	5,692	17,685	17,562
Net interest income	60,609	48,611	176,367	144,243
Provision for credit losses	1,798	1,478	5,768	4,526
Net interest income after provision for credit losses	58,811	47,133	170,599	139,717
Non-interest income	18,186	16,654	54,440	51,944
Non-interest expense	46,981	39,263	147,029	119,661
Income before provision for income taxes	30,016	24,524	78,010	72,000
Provision for income taxes	7,768	6,358	20,250	18,538
Net income	22,248	18,166	57,760	53,462
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income	66,935	54,303	194,052	161,805
Interest expense	6,326	5,692	17,685	17,562
Net interest income	60,609	48,611	176,367	144,243
Provision for credit losses	1,798	1,478	5,768	4,526
Net interest income after provision for credit losses	58,811	47,133	170,599	139,717
Non-interest income	13,060	11,558	37,785	35,990
Non-interest expense	44,039	36,292	137,903	110,485
Income before provision for income taxes	27,832	22,399	70,481	65,222
Provision for income taxes	6,894	5,508	17,238	15,827
Net income	20,938	16,891	53,243	49,395
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Non-interest income	5,126	5,096	16,655	15,954
Non-interest expense	2,942	2,971	9,126	9,176
Income before provision for income taxes	2,184	2,125	7,529	6,778
Provision for income taxes	874	850	3,012	2,711
Net income	$ 1,310	$ 1,275	$ 4,517	$ 4,067

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Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Allowance for credit losses associated with loan commitments	$ 630	$ 455	$ 533	$ 602
Liability associated with letters of credit	$ 200	$ 200

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Earnings Per Common Share - Additional Information (Detail)	Feb. 10, 2015 shares
ESB Financial Corporation [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares issued	9,178,531

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Loans and the Allowance for Credit Losses - Loans Identified as TDRs (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) Contract	Sep. 30, 2014 USD ($) Contract	Sep. 30, 2015 USD ($) Contract	Sep. 30, 2014 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1	6	45	22
Pre-Modification Outstanding Recorded Investment	$ 13	$ 697	$ 11,195	$ 1,228
Post-Modification Outstanding Recorded Investment	$ 12	$ 684	$ 10,313	$ 1,162
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1		8
Pre-Modification Outstanding Recorded Investment	$ 13		$ 1,065
Post-Modification Outstanding Recorded Investment	$ 12		$ 1,002
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract		2	7	4
Pre-Modification Outstanding Recorded Investment		$ 475	$ 9,336	$ 692
Post-Modification Outstanding Recorded Investment		$ 465	$ 8,541	$ 664
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract			2
Pre-Modification Outstanding Recorded Investment			$ 42
Post-Modification Outstanding Recorded Investment			$ 50
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1	2	15	4
Pre-Modification Outstanding Recorded Investment	$ 13	$ 475	$ 10,401	$ 692
Post-Modification Outstanding Recorded Investment	$ 12	$ 465	$ 9,543	$ 664
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract		1	8	5
Pre-Modification Outstanding Recorded Investment		$ 112	$ 466	$ 286
Post-Modification Outstanding Recorded Investment		$ 112	$ 447	$ 278
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract		2	19	12
Pre-Modification Outstanding Recorded Investment		$ 52	$ 279	$ 191
Post-Modification Outstanding Recorded Investment		$ 50	$ 267	$ 163
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract		1	1	1
Pre-Modification Outstanding Recorded Investment		$ 58	$ 7	$ 59
Post-Modification Outstanding Recorded Investment		$ 57	$ 6	$ 57

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Securities (Tables)

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of Fair Value and Amortized Cost of Available-for-sale and Held-to-maturity Securities

The following table presents the fair value and amortized cost of available-for-sale and held-to-maturity securities:

	September 30, 2015									December 31, 2014
(unaudited, in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-sale
Obligations of government agencies	$	79,390	$	1,433	$	(14	)	$	80,809	$	86,964	$	1,087	$	(315	)	$	87,736
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,248,057		6,767		(4,376	)		1,250,448		703,535		4,336		(6,758	)		701,113
Obligations of states and political subdivisions		85,523		4,830		(44	)		90,309		86,073		5,365		(5	)		91,433
Corporate debt securities		127,201		318		(170	)		127,349		25,974		141		(119	)		25,996
Total debt securities	$	1,540,171	$	13,348	$	(4,604	)	$	1,548,915	$	902,546	$	10,929	$	(7,197	)	$	906,278
Equity securities		10,106		697		—			10,803		10,304		842		—			11,146
Total available-for-sale securities	$	1,550,277	$	14,045	$	(4,604	)	$	1,559,718	$	912,850	$	11,771	$	(7,197	)	$	917,424
Held-to-maturity
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies	$	161,495	$	2,848	$	(358	)	$	163,985	$	79,004	$	3,262	$	(246	)	$	82,020
Obligations of states and political subdivisions		766,423		25,359		(1,336	)		790,446		507,927		23,917		(1,043	)		530,801
Corporate debt securities		29,434		183		(51	)		29,566		6,739		106		(49	)		6,796
Total held-to-maturity securities	$	957,352	$	28,390	$	(1,745	)	$	983,997	$	593,670	$	27,285	$	(1,338	)	$	619,617
Total securities	$	2,507,629	$	42,435	$	(6,349	)	$	2,543,715	$	1,506,520	$	39,056	$	(8,535	)	$	1,537,041

Schedule of Fair Value of Available-for-sale and Held-to-maturity Securities by Contractual Maturity

The following table presents the fair value of available-for-sale and held-to-maturity securities by contractual maturity at September 30, 2015. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date.

	September 30, 2015
(unaudited, in thousands)	One Year or less		One to Five Years		Five to Ten Years		After Ten Years		Mortgage-backed and Equity		Total
Available-for-sale
Obligations of government agencies	$	—	$	20,000	$	39,115	$	21,694	$	—	$	80,809
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies (1)		—		—		—		—		1,250,448		1,250,448
Obligations of states and political subdivisions		7,286		26,827		33,021		23,175		—		90,309
Corporate debt securities		49,777		61,384		14,251		1,937		—		127,349
Equity securities (2)		—		—		—		—		10,803		10,803
Total available-for-sale securities	$	57,063	$	108,211	$	86,387	$	46,806	$	1,261,251	$	1,559,718
Held-to-maturity (3)
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies (1)	$	—	$	—	$	—	$	—	$	163,985	$	163,985
Obligations of states and political subdivisions		1,863		34,159		342,764		411,660		—		790,446
Corporate debt securities		—		1,010		24,616		3,940		—		29,566
Total held-to-maturity securities	$	1,863	$	35,169	$	367,380	$	415,600	$	163,985	$	983,997
Total securities	$	58,926	$	143,380	$	453,767	$	462,406	$	1,425,236	$	2,543,715

⁽¹⁾  Mortgage-backed and collateralized mortgage securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds.

⁽²⁾ Equity securities, which have no stated maturity, are not assigned a maturity category.

⁽³⁾ The held-to-maturity portfolio is carried at an amortized cost of $957.4 million.

Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities

The following table presents the gross realized gains and losses on sales and calls of securities for the three and nine months ended September 30, 2015 and 2014, respectively.

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
(unaudited, in thousands)	2015			2014			2015			2014
Gross realized gains	$	48		$	602		$	74		$	967
Gross realized losses		(1	)		(21	)		(5	)		(211	)
Net realized gains (losses)	$	47		$	581		$	69		$	756

Schedule of Unrealized Losses on Investment Securities

The following tables provide information on unrealized losses on investment securities that have been in an unrealized loss position for less than twelve months and twelve months or more as of September 30, 2015 and December 31, 2014:

	September 30, 2015
	Less than 12 months							12 months or more							Total
(unaudited, dollars in thousands)	Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities
Obligations of government agencies	$	12,986	$	(14	)		2	$	—	$	—			—	$	12,986	$	(14	)		2
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		430,580		(1,753	)		73		145,652		(2,981	)		31		576,232		(4,734	)		104
Obligations of states and political subdivisions		120,249		(941	)		166		20,601		(439	)		30		140,850		(1,380	)		196
Corporate debt securities		71,958		(172	)		22		1,937		(49	)		1		73,895		(221	)		23
Total temporarily impaired securities	$	635,773	$	(2,880	)		263	$	168,190	$	(3,469	)		62	$	803,963	$	(6,349	)		325
	December 31, 2014
	Less than 12 months							12 months or more							Total
(unaudited, dollars in thousands)	Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities		Fair Value		Unrealized Losses			# of Securities
Obligations of government agencies	$	19,362	$	(77	)		5	$	19,757	$	(238	)		4	$	39,119	$	(315	)		9
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		78,786		(386	)		19		240,055		(6,618	)		43		318,841		(7,004	)		62
Obligations of states and political subdivisions		12,615		(96	)		15		61,548		(952	)		93		74,163		(1,048	)		108
Corporate debt securities		2,969		(31	)		1		4,573		(137	)		2		7,542		(168	)		3
Total temporarily impaired securities	$	113,732	$	(590	)		40	$	325,933	$	(7,945	)		142	$	439,665	$	(8,535	)		182

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Commitments and Contingent Liabilities (Tables)

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding

The following table presents total commitments to extend credit, guarantees and various letters of credit outstanding:

	September 30,		December 31,
(unaudited, in thousands)	2015		2014
Lines of credit	$	1,162,715	$	984,352
Loans approved but not closed		283,912		116,757
Overdraft limits		106,025		95,965
Letters of credit		27,605		23,362
Contingent obligations to purchase loans funded by other entities		9,256		8,312

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Loans and the Allowance for Credit Losses - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	$ 54,216		$ 54,216		$ 45,474
Total impaired loans, Unpaid principal balance	66,123		66,123		55,296
Recorded Investment, With no specific allowance recorded	43,930		43,930		41,062
Total impaired loans, Recorded investment	53,324		53,324		50,884
Unpaid Principal Balance, With a specific allowance recorded	11,907		11,907		9,822
Recorded Investment, With a specific allowance recorded	9,394		9,394		9,822
Related Allowance, With a specific allowance recorded	2,650		2,650		3,798
Average recorded investment, with no related specific allowance	46,528	$ 45,107	46,147	$ 46,626
Interest income recognized, With no related specific allowance	555	436	1,650	1,165
Average recorded investment, With a specific allowance recorded	10,718	4,207	9,873	3,633
Interest income recognized, With a specific allowance recorded	7	136	200	181
Total impaired loans, Average recorded investment	57,246	49,314	56,020	50,259
Total impaired loans, Interest income recognized	562	572	1,850	1,346
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	2,485		2,485		1,588
Recorded Investment, With no specific allowance recorded	2,319		2,319		1,488
Average recorded investment, with no related specific allowance	2,414	1,749	2,198	2,099
Interest income recognized, With no related specific allowance	12	11	30	26
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	24,277		24,277		16,480
Recorded Investment, With no specific allowance recorded	17,234		17,234		14,684
Unpaid Principal Balance, With a specific allowance recorded	5,719		5,719		7,980
Recorded Investment, With a specific allowance recorded	4,510		4,510		7,980
Related Allowance, With a specific allowance recorded	1,152		1,152		2,765
Average recorded investment, with no related specific allowance	19,118	17,672	18,850	18,415
Interest income recognized, With no related specific allowance	245	169	708	322
Average recorded investment, With a specific allowance recorded	6,011	2,269	6,617	1,499
Interest income recognized, With a specific allowance recorded	(56)	109		113
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	3,608		3,608		3,152
Recorded Investment, With no specific allowance recorded	2,924		2,924		2,597
Unpaid Principal Balance, With a specific allowance recorded	6,188		6,188		1,842
Recorded Investment, With a specific allowance recorded	4,884		4,884		1,842
Related Allowance, With a specific allowance recorded	1,498		1,498		1,033
Average recorded investment, with no related specific allowance	3,193	4,071	2,854	3,802
Interest income recognized, With no related specific allowance	37	(2)	99	87
Average recorded investment, With a specific allowance recorded	4,707	1,938	3,256	2,134
Interest income recognized, With a specific allowance recorded	63	27	200	68
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	18,736		18,736		20,077
Recorded Investment, With no specific allowance recorded	17,048		17,048		18,544
Average recorded investment, with no related specific allowance	17,508	18,337	18,173	18,900
Interest income recognized, With no related specific allowance	200	219	665	610
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	1,421		1,421		1,287
Recorded Investment, With no specific allowance recorded	1,095		1,095		1,086
Average recorded investment, with no related specific allowance	1,142	1,087	1,176	1,131
Interest income recognized, With no related specific allowance	27	26	73	72
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	3,689		3,689		2,890
Recorded Investment, With no specific allowance recorded	3,310		3,310		$ 2,663
Average recorded investment, with no related specific allowance	3,153	2,191	2,896	2,279
Interest income recognized, With no related specific allowance	$ 34	$ 13	$ 75	$ 48

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Loans and the Allowance for Credit Losses - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015 USD ($) Contract	Feb. 10, 2015 USD ($)	Dec. 31, 2014 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Deferred loan fees and costs	$ 1,400,000		$ 2,400,000
Aggregate amount of residential real estate, home equity and consumer loans classified as substandard	15,400,000		15,200,000
Internally assigned loan grades to residential real estate, home equity and consumer loans	2,800,000		2,200,000
Book value of acquired loans	716,200,000
Fair value of acquired loans	701,000,000
Loans acquired accretable	1,400,000	$ 1,900,000
Book value, acquired loans with deteriorated credit quality	16,100,000
Contractually required payments, acquired loans with deteriorated credit quality	21,800,000
Fair value of acquired loans with deteriorated credit quality	10,900,000
Accretion, recognized in interest income, on acquired impaired loans	500,000
Certain loans acquired in transfer not accounted for as debt securities acquired during period at acquisition non accrual	8,300,000
Certain loans acquired in transfer not accounted for as debt securities acquired during period at acquisition accrual amount	1,300,000
Deteriorated credit quality loans acquired non-accretable difference	9,000,000
Allowance for loan losses related to the acquired impaired loans	$ 0
Non-accrual status period	90 days
Number of restructured contracts greater than $1 million | Contract	2
Accruing and non accrual TDR permitted interest-only payment period	3 months
Total troubled debt restructuring	$ 24,691,000		17,486,000
Other real estate owned	5,967,000		4,920,000
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance loans acquired with deteriorated credit quality	$ 9,600,000
Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of TDRs defaulted during the period that were restructured within the last twelve months	1.00%
Performing Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of acquired loans	$ 690,100,000
Loans acquired accretable	10,000,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total troubled debt restructuring	9,543,000		10,289,000
Other real estate owned	2,000,000		600,000
Foreclosure proceedings in process on residential real estate loans	3,800,000
Accruing TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Total troubled debt restructuring	12,030,000		12,066,000
Accruing TDRs [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total troubled debt restructuring	7,717,000		8,215,000
Non-Accrual TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Total troubled debt restructuring	12,661,000		5,420,000
Non-Accrual TDRs [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total troubled debt restructuring	1,826,000		$ 2,074,000
ESB Financial Corporation [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of acquired loans		$ 700,964,000
Total troubled debt restructuring	9,300,000
ESB Financial Corporation [Member] | Accruing TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Total troubled debt restructuring	1,300,000
ESB Financial Corporation [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Total troubled debt restructuring	$ 8,000,000

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Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Deferred Benefits for Directors [Member]
Beginning Balance at Dec. 31, 2013	$ 746,595	$ 61,182	$ 244,974	$ 460,351	$ (5,969)	$ (12,734)	$ (1,209)
Beginning Balance, shares at Dec. 31, 2013		29,175,236
Net income	53,462			53,462
Other comprehensive income	5,311					5,311
Comprehensive income	58,773
Common dividends declared ($0.69 and 0.66 per share in September 30, 2015 and 2014 respectively)	(19,302)			(19,302)
Treasury shares acquired	(20)		49		(69)
Treasury shares acquired, shares		(2,258)
Stock options exercised	1,774		(342)		2,116
Stock options exercised, shares		68,143
Restricted stock granted			(1,321)		1,321
Restricted stock granted, shares		42,554
Stock compensation expense	964		964
Deferred benefits for directors- net			34				(34)
Ending Balance at Sep. 30, 2014	788,784	$ 61,182	244,358	494,511	(2,601)	(7,423)	(1,243)
Ending Balance, shares at Sep. 30, 2014		29,283,675
Beginning Balance at Dec. 31, 2014	788,190	$ 61,182	244,661	504,578	(2,151)	(18,825)	(1,255)
Beginning Balance, shares at Dec. 31, 2014		29,298,188
Net income	57,760			57,760
Other comprehensive income	4,379					4,379
Comprehensive income	62,139
Common dividends declared ($0.69 and 0.66 per share in September 30, 2015 and 2014 respectively)	(26,561)			(26,561)
Shares issued for acquisition	293,629	$ 19,122	274,507
Shares issued for acquisition, shares		9,178,531
Treasury shares acquired	(2,065)				(2,065)
Treasury shares acquired, shares		(64,102)
Stock options exercised	1,473		(295)		1,768
Stock options exercised, shares		55,375
Restricted stock granted			(1,558)		1,558
Restricted stock granted, shares		49,550
Repurchase of stock warrant	(2,247)		(2,247)
Stock compensation expense	1,184		1,184
Deferred benefits for directors- net			(469)				469
Ending Balance at Sep. 30, 2015	$ 1,115,742	$ 80,304	$ 515,783	$ 535,777	$ (890)	$ (14,446)	$ (786)
Ending Balance, shares at Sep. 30, 2015		38,517,542

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Earnings Per Common Share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Earnings Per Common Share

NOTE 3. EARNINGS PER COMMON SHARE

Earnings per common share are calculated as follows:

	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
(unaudited, in thousands, except shares and per share amounts)	2015		2014		2015		2014
Numerator for both basic and diluted earnings per common share:
Net income	$	22,248	$	18,166	$	57,760	$	53,462
Denominator:
Total average basic common shares outstanding		38,523,593		29,280,648		37,144,783		29,235,364
Effect of dilutive stock options and warrant		33,402		80,232		59,331		81,550
Total diluted average common shares outstanding		38,556,995		29,360,880		37,204,114		29,316,914
Earnings per common share - basic	$	0.58	$	0.62	$	1.55	$	1.83
Earnings per common share - diluted	$	0.58	$	0.62	$	1.55	$	1.82

All stock options outstanding were included in the computation of diluted earnings per share for the three and nine months ended September 30, 2015 and 2014, respectively, as all were considered dilutive.

On February 10, 2015, WesBanco issued 9,178,531 shares to complete its acquisition of ESB. These shares are included in average shares outstanding beginning on that date. For additional information relating to the ESB acquisition, refer to Note 2, “Mergers and Acquisitions.”

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Fair Value Measurement - Schedule of Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other real estate owned and repossessed assets	$ 6,062	$ 5,082
Nonrecurring Fair Value Measurements [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	6,744	6,024
Other real estate owned and repossessed assets	6,062	5,082
Significant Unobservable Inputs (Level 3) [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	6,744	6,024
Other real estate owned and repossessed assets	$ 6,062	$ 5,082
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans, Appraisal adjustments	0.00%	0.00%
Impaired loans, Liquidation expenses	(3.10%)	(1.20%)
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans, Appraisal adjustments	(39.10%)	(39.70%)
Impaired loans, Liquidation expenses	(8.00%)	(8.00%)
Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans, Appraisal adjustments	(20.30%)	(6.70%)
Impaired loans, Liquidation expenses	(6.90%)	(6.70%)

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Business Segments (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Financial Information by Business Segment

Condensed financial information by business segment is presented below:

(unaudited, in thousands)	Community Banking		Trust and Investment Services		Consolidated
For the Three Months ended September 30, 2015:
Interest income	$	66,935	$	—	$	66,935
Interest expense		6,326		—		6,326
Net interest income		60,609		—		60,609
Provision for credit losses		1,798		—		1,798
Net interest income after provision for credit losses		58,811		—		58,811
Non-interest income		13,060		5,126		18,186
Non-interest expense		44,039		2,942		46,981
Income before provision for income taxes		27,832		2,184		30,016
Provision for income taxes		6,894		874		7,768
Net income	$	20,938	$	1,310	$	22,248
For the Three Months ended September 30, 2014:
Interest income	$	54,303	$	—	$	54,303
Interest expense		5,692		—		5,692
Net interest income		48,611		—		48,611
Provision for credit losses		1,478		—		1,478
Net interest income after provision for credit losses		47,133		—		47,133
Non-interest income		11,558		5,096		16,654
Non-interest expense		36,292		2,971		39,263
Income before provision for income taxes		22,399		2,125		24,524
Provision for income taxes		5,508		850		6,358
Net income	$	16,891	$	1,275	$	18,166
For the Nine Months ended September 30, 2015:
Interest income	$	194,052	$	—	$	194,052
Interest expense		17,685		—		17,685
Net interest income		176,367		—		176,367
Provision for credit losses		5,768		—		5,768
Net interest income after provision for credit losses		170,599		—		170,599
Non-interest income		37,785		16,655		54,440
Non-interest expense		137,903		9,126		147,029
Income before provision for income taxes		70,481		7,529		78,010
Provision for income taxes		17,238		3,012		20,250
Net income	$	53,243	$	4,517	$	57,760
For the Nine Months ended September 30, 2014:
Interest income	$	161,805	$	—	$	161,805
Interest expense		17,562		—		17,562
Net interest income		144,243		—		144,243
Provision for credit losses		4,526		—		4,526
Net interest income after provision for credit losses		139,717		—		139,717
Non-interest income		35,990		15,954		51,944
Non-interest expense		110,485		9,176		119,661
Income before provision for income taxes		65,222		6,778		72,000
Provision for income taxes		15,827		2,711		18,538
Net income	$	49,395	$	4,067	$	53,462

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Securities - Schedule of Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Amortized Cost and Fair Value Debt Securities [Abstract]
Held-to-maturity, Amortized Cost	$ 957,352	$ 593,670

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Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Summary of Earnings Per Common Share

Earnings per common share are calculated as follows:

	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
(unaudited, in thousands, except shares and per share amounts)	2015		2014		2015		2014
Numerator for both basic and diluted earnings per common share:
Net income	$	22,248	$	18,166	$	57,760	$	53,462
Denominator:
Total average basic common shares outstanding		38,523,593		29,280,648		37,144,783		29,235,364
Effect of dilutive stock options and warrant		33,402		80,232		59,331		81,550
Total diluted average common shares outstanding		38,556,995		29,360,880		37,204,114		29,316,914
Earnings per common share - basic	$	0.58	$	0.62	$	1.55	$	1.83
Earnings per common share - diluted	$	0.58	$	0.62	$	1.55	$	1.82