WesBanco (WSBC) 10-Q 31 Jul 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Jul. 25, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Trading Symbol	WSBC
Entity Registrant Name	WESBANCO INC
Entity Central Index Key	203,596
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		44,031,335

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks, including interest bearing amounts of $6,506 and $21,913, respectively	$ 110,695	$ 128,170
Securities:
Trading securities, at fair value	7,880	7,071
Available-for-sale, at fair value	1,239,420	1,241,176
Held-to-maturity (fair values of $1,049,374 and $1,076,790, respectively)	1,030,394	1,067,967
Total securities	2,277,694	2,316,214
Loans held for sale	21,677	17,315
Portfolio loans, net of unearned income	6,390,417	6,249,436
Allowance for loan losses	(44,909)	(43,674)
Net portfolio loans	6,345,508	6,205,762
Premises and equipment, net	134,903	133,297
Accrued interest receivable	28,501	28,299
Goodwill and other intangible assets, net	591,252	593,187
Bank-owned life insurance	190,304	188,145
Other assets	173,476	180,488
Total Assets	9,874,010	9,790,877
Deposits:
Non-interest bearing demand	1,801,423	1,789,522
Interest bearing demand	1,625,011	1,546,890
Money market	1,005,184	995,477
Savings deposits	1,255,083	1,213,168
Certificates of deposit	1,385,772	1,495,822
Total deposits	7,072,473	7,040,879
Federal Home Loan Bank borrowings	1,021,592	968,946
Other short-term borrowings	167,671	199,376
Subordinated debt and junior subordinated debt	164,228	163,598
Total borrowings	1,353,491	1,331,920
Accrued interest payable	2,407	2,204
Other liabilities	68,102	74,466
Total Liabilities	8,496,473	8,449,469
SHAREHOLDERS' EQUITY
Preferred stock, no par value; 1,000,000 shares authorized; none outstanding
Common stock, $2.0833 par value; 100,000,000 shares authorized in 2017 and 2016, respectively; 44,041,572 and 43,931,715 shares issued, respectively; 44,031,335 and 43,931,715 shares outstanding, respectively	91,753	91,524
Capital surplus	682,443	680,507
Retained earnings	626,421	597,071
Treasury stock (10,237 and 0 shares in 2017 and 2016, respectively, at cost)	(385)
Accumulated other comprehensive loss	(22,118)	(27,126)
Deferred benefits for directors	(577)	(568)
Total Shareholders' Equity	1,377,537	1,341,408
Total Liabilities and Shareholders' Equity	$ 9,874,010	$ 9,790,877

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Interest bearing deposits, banks	$ 6,506	$ 21,913
Held-to-maturity securities, fair values	$ 1,049,374	$ 1,076,790
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	100,000,000
Common stock, shares issued	44,041,572	43,931,715
Common stock, shares outstanding	44,031,335	43,931,715
Treasury stock, shares	10,237	0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 67,360	$ 52,697	$ 132,258	$ 105,035
Interest and dividends on securities:
Taxable	9,375	9,775	18,970	19,993
Tax-exempt	4,864	4,540	9,756	9,061
Total interest and dividends on securities	14,239	14,315	28,726	29,054
Other interest income	561	573	1,100	1,097
Total interest and dividend income	82,160	67,585	162,084	135,186
INTEREST EXPENSE
Interest bearing demand deposits	1,506	643	2,599	1,150
Money market deposits	644	450	1,218	906
Savings deposits	185	165	367	330
Certificates of deposit	2,491	2,583	4,902	5,242
Total interest expense on deposits	4,826	3,841	9,086	7,628
Federal Home Loan Bank borrowings	3,145	3,031	5,980	6,099
Other short-term borrowings	262	99	560	181
Subordinated debt and junior subordinated debt	1,788	840	3,600	1,663
Total interest expense	10,021	7,811	19,226	15,571
NET INTEREST INCOME	72,139	59,774	142,858	119,615
Provision for credit losses	2,383	1,811	5,094	4,135
Net interest income after provision for credit losses	69,756	57,963	137,764	115,480
NON-INTEREST INCOME
Trust fees	5,572	5,036	11,716	10,747
Service charges on deposits	5,081	4,176	9,933	8,128
Electronic banking fees	4,984	3,742	9,512	7,345
Net securities brokerage revenue	1,680	1,750	3,442	3,646
Bank-owned life insurance	1,367	942	2,508	1,915
Net gains on sales of mortgage loans	968	683	2,408	1,231
Net securities gains	494	585	506	1,696
Net gain on other real estate owned and other assets	342	214	307	196
Other income	1,634	2,463	4,674	4,080
Total non-interest income	22,122	19,591	45,006	38,984
NON-INTEREST EXPENSE
Salaries and wages	23,616	19,731	46,618	38,911
Employee benefits	7,731	7,332	15,941	14,409
Net occupancy	4,510	3,220	8,837	6,811
Equipment	4,097	3,402	8,139	6,830
Marketing	2,060	1,608	2,884	2,581
FDIC insurance	906	1,099	1,733	2,264
Amortization of intangible assets	1,240	697	2,513	1,427
Restructuring and merger-related expense		694	491	694
Other operating expenses	11,724	9,577	23,112	18,776
Total non-interest expense	55,884	47,360	110,268	92,703
Income before provision for income taxes	35,994	30,194	72,502	61,761
Provision for income taxes	9,653	8,085	20,274	16,779
NET INCOME	$ 26,341	$ 22,109	$ 52,228	$ 44,982
EARNINGS PER COMMON SHARE
Basic	$ 0.60	$ 0.58	$ 1.19	$ 1.17
Diluted	$ 0.60	$ 0.58	$ 1.19	$ 1.17
AVERAGE COMMON SHARES OUTSTANDING
Basic	43,995,749	38,373,610	43,971,789	38,380,296
Diluted	44,061,421	38,410,393	44,046,812	38,414,922
DIVIDENDS DECLARED PER COMMON SHARE	$ 0.26	$ 0.24	$ 0.52	$ 0.48
COMPREHENSIVE INCOME	$ 29,065	$ 27,368	$ 57,236	$ 62,839

Consolidated Statements of Chan

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 (Loss) Income [Member]	Deferred Benefits for Directors [Member]
Beginning Balance at Dec. 31, 2015	$ 1,122,132	$ 80,304	$ 516,294	$ 549,921	$ (2,640)	$ (20,954)	$ (793)
Beginning Balance, shares at Dec. 31, 2015		38,459,635
Net income	44,982			44,982
Other comprehensive income	17,857					17,857
Comprehensive income	62,839
Common dividends declared ($0.52 and $0.48 per share in June 30, 2017 and 2016 respectively)	(18,420)			(18,420)
Treasury shares acquired	(3,674)				(3,674)
Treasury shares acquired, shares		(128,317)
Stock options exercised	709		(173)		882
Stock options exercised, shares		28,375
Issuance of restricted stock			(1,564)		1,564
Issuance of restricted stock, shares		51,650
Stock compensation expense	834		834
Deferred benefits for directors- net			(235)				235
Ending Balance at Jun. 30, 2016	1,164,420	$ 80,304	515,156	576,483	(3,868)	(3,097)	(558)
Ending Balance, shares at Jun. 30, 2016		38,411,343
Beginning Balance at Dec. 31, 2016	1,341,408	$ 91,524	680,507	597,071		(27,126)	(568)
Beginning Balance, shares at Dec. 31, 2016		43,931,715
Net income	52,228			52,228
Other comprehensive income	5,008					5,008
Comprehensive income	57,236
Common dividends declared ($0.52 and $0.48 per share in June 30, 2017 and 2016 respectively)	(22,878)			(22,878)
Treasury shares acquired	(488)				(488)
Treasury shares acquired, shares		(12,987)
Stock options exercised	1,061	$ 75	883		103
Stock options exercised, shares		38,584
Issuance of restricted stock		$ 154	(154)
Issuance of restricted stock, shares		74,023
Stock compensation expense	1,198		1,198
Deferred benefits for directors- net			9				(9)
Ending Balance at Jun. 30, 2017	$ 1,377,537	$ 91,753	$ 682,443	$ 626,421	$ (385)	$ (22,118)	$ (577)
Ending Balance, shares at Jun. 30, 2017		44,031,335

Consolidated Statements of Cha6

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Common dividends declared, per share	$ 0.52	$ 0.48
Retained Earnings [Member]
Common dividends declared, per share	$ 0.52	$ 0.48

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Cash Flows [Abstract]
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 56,509	$ 59,861
INVESTING ACTIVITIES
Net increase in loans held for investment	(141,174)	(103,249)
Securities available-for-sale:
Proceeds from sales	7,760	109,644
Proceeds from maturities, prepayments and calls	102,225	154,447
Purchases of securities	(104,584)	(83,783)
Securities held-to-maturity:
Proceeds from maturities, prepayments and calls	64,188	44,077
Purchases of securities	(29,912)	(31,848)
Proceeds from bank-owned life insurance	349	19
Purchases of premises and equipment - net	(4,898)	(2,804)
Net cash (used in) provided by investing activities	(106,046)	86,503
FINANCING ACTIVITIES
Increase (decrease) in deposits	32,494	(137,386)
Proceeds from Federal Home Loan Bank borrowings	415,000	65,000
Repayment of Federal Home Loan Bank borrowings	(362,331)	(49,685)
Decrease in other short-term borrowings	(6,205)	(6,253)
(Decrease) increase in federal funds purchased	(25,500)	4,000
Dividends paid to common shareholders	(21,969)	(18,060)
Issuance of common stock	990
Treasury shares purchased - net	(417)	(3,039)
Net cash provided by (used in) financing activities	32,062	(145,423)
Net (decrease) increase in cash and cash equivalents	(17,475)	941
Cash and cash equivalents at beginning of the period	128,170	86,685
Cash and cash equivalents at end of the period	110,695	87,626
SUPPLEMENTAL DISCLOSURES
Interest paid on deposits and other borrowings	19,844	15,994
Income taxes paid	14,700	14,500
Transfers of loans to other real estate owned	$ 298	$ 546

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of presentation — 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 2016 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 March 2017, FASB issued ASU 2017-08 that shortens the amortization period of certain callable debt securities held at a premium. The premium is required to be amortized to the earliest call date. Securities held at a discount continue to be amortized to maturity. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, which for WesBanco will be effective for the fiscal year beginning January 1, 2019. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements. In March 2017, the FASB issued ASU 2017-07 that changes how employer-sponsored defined benefit pension and/or other postretirement benefit plans present the net periodic benefit cost in the income statement. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Only the service cost component will be eligible for capitalization in assets. Employers will present the other components of the net periodic benefit cost separately from the line items that includes the service cost outside of any subtotal of operating income, if one is presented. These components will not be eligible for capitalization in assets. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual period (i.e., only in the first interim period). For WesBanco, this update will be effective for the fiscal year beginning January 1, 2018. Upon adoption, WesBanco will reclassify the service cost component from employee benefits to salaries and wages, which are both components of non-interest expense. The service cost component for the three and six months ending June 30, 2017 was $0.6 million and $1.3 million, respectively. In January 2017, the FASB issued ASU 2017-04 that eliminated the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value. Public business entities that are a U.S. Securities and Exchange Commission filer should adopt this update for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019, which for WesBanco will be effective for the fiscal year beginning January 1, 2020. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements. In January 2017, the FASB issued ASU No. 2017-01, which clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, which for WesBanco will be effective for the fiscal year beginning January 1, 2018. WesBanco is currently evaluating the potential impact of ASU 2017-01 but it is not expected that the adoption of this new standard will have a material impact on WesBanco’s Consolidated Financial Statements. In October 2016, the FASB issued ASU 2016-16 that provides the recognition of income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Current guidance prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in generally accepted accounting principles. The exception has led to diversity in practice and is a source of complexity in financial reporting. FASB decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this update eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments in this update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, which for WesBanco will be effective for the fiscal year beginning January 1, 2018. The amendments in this update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements. In August 2016, the FASB issued ASU 2016-15 that provides guidance for the classification of cash flows related to (1) debt prepayment or extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon rates that are insignificant in relation to the effective interest rate on the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions and (8) separately identifiable cash flows and application of the predominance principle. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, which for WesBanco will be effective for the fiscal year beginning January 1, 2018. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements. In June 2016, the FASB issued ASU 2016-13 that will require entities to use a new forward-looking “expected loss” model on trade and other receivables, held-to-maturity debt securities, loans and other instruments that generally will result in the earlier recognition of allowances for credit losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. Entities will have to disclose significantly more information, including information they use to track credit quality by year of origination for most financing receivables. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, which for WesBanco will be effective for the fiscal year beginning January 1, 2020. Early adoption is permitted for fiscal years beginning after December 15, 2018. WesBanco is currently evaluating the impact of the adoption of this pronouncement on WesBanco’s Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-09 that will require all excess income tax benefits or tax deficiencies of stock awards to be recognized in the income statement when the awards vest or are settled. It also will allow an employer to repurchase more of an employee’s shares than it can today for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-07 that eliminates the requirement to retrospectively apply the equity method in previous periods when an investor initially obtains significant influence over an investee. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2016, and requires prospective adoption. Early adoption is permitted. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements. In February 2016, the FASB issued ASU 2016-02 that will require entities to recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. The principal difference from previous guidance is that the lease assets and lease liabilities arising from operating leases were not previously recognized in the balance sheet. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. WesBanco is currently evaluating the impact of the adoption of this pronouncement on WesBanco’s Consolidated Financial Statements. In January 2016, the FASB issued ASU 2016-01 that will require entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value and recognize any changes in fair value in net income unless the investments qualify for the new practicability exception. The standard does not change the guidance for classifying and measuring investments in debt securities and loans. Entities will have to record changes in instrument-specific credit risk for financial liabilities measured under the fair value option in other comprehensive income. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within 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 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. 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. In March 2016, the FASB issued ASU 2016-08, which amends the principle versus agent guidance in the revenue standard. In April 2016, the FASB issued ASU 2016-10, which clarifies when promised goods or services are separately identifiable in the revenue standard. In May 2016, FASB issued ASU 2016-12, which provides narrow-scope improvements and practical expedients to the revenue standard. While WesBanco is currently evaluating the impact of this standard on individual customer contracts, management has evaluated the impact of this standard on the broad categories of its customer contracts and revenue streams. WesBanco currently anticipates this standard will not have a material impact on its Consolidated Financial Statements because revenue related to financial instruments, including loans and investment securities are not in scope of these updates. Loan interest income, investment interest income, insurance services revenue and BOLI are accounted for under other U.S. GAAP standards and are therefore, out of scope of the ASC 606 revenue standard. Trust fees, service charges on deposits, electronic banking fees, net securities brokerage revenue, net gains on sales of mortgage loans, and net gain on other real estate owned and other assets are in scope of the ASC 606 revenue standard. The Company is currently reviewing contracts related to these revenue streams. The Company does not anticipate any material changes to revenue recognition; however, the Company’s review is still ongoing. The Company plans to adopt the revenue recognition standard as of January 1, 2018. In January 2014, the FASB issued ASU No. 2014-01, which applies to all reporting entities that invest in qualified affordable housing projects through limited liability entities. The pronouncement permits reporting entities to make an accounting policy election to account for these investments using the proportional amortization method if certain conditions exist. The pronouncement also requires disclosure that enables users of its financial statements to understand the nature of these investments in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The pronouncement is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. WesBanco made an accounting policy election to adopt the ASU in the first quarter of 2017. With the adoption of this pronouncement, WesBanco now classifies the amortization of the investment as a component of income tax expense (benefit). The amount for the three and six months ending June 30, 2017 was $0.3 million and $0.8 million, respectively, which is included in income tax expense within WesBanco’s Consolidated Financial Statements.

Mergers and Acquisitions

Mergers and Acquisitions	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Mergers and Acquisitions	NOTE 2. MERGERS AND ACQUISITIONS On September 9, 2016, WesBanco completed its acquisition of Your Community Bankshares, Inc. (“YCB”), and its wholly-owned banking subsidiary, Your Community Bank (“YCB Bank”), an Indiana state-chartered commercial bank headquartered in New Albany, Indiana. The transaction expanded WesBanco’s franchise into Kentucky and southern Indiana. On the acquisition date, YCB had approximately $1.5 billion in total assets, excluding goodwill, including approximately $1.0 billion in loans and $173.2 million in securities. The YCB acquisition was valued at $220.5 million, based on WesBanco’s closing stock price on September 9, 2016 of $32.62, and resulted in WesBanco issuing 5,423,348 shares of its common stock and $43.3 million in cash in exchange for all of the outstanding shares of YCB common stock. The assets and liabilities of YCB were recorded on WesBanco’s balance sheet at their preliminary estimated fair value as of September 9, 2016, the acquisition date, and YCB’s results of operations have been included in WesBanco’s Consolidated Statements of Income since that date. Due to the timing of the acquisition relative to the end of the reporting period, the fair values for certain assets and liabilities acquired from YCB on September 9, 2016 represented preliminary estimates. Based on the purchase price allocation, WesBanco recorded $93.0 million in goodwill and $12.0 million in core deposit intangibles in its Community Banking segment, representing the principal change in goodwill and intangibles in 2016. None of the goodwill is deductible for income tax purposes, as the acquisition is accounted for as a tax-free exchange for tax purposes. For the six months ended June 30, 2017 and for the twelve months ended December 31, 2016, WesBanco recorded merger-related expenses of $0.5 million and $13.3 million, respectively, associated with the YCB acquisition. The purchase price of the YCB acquisition and resulting goodwill is summarized as follows: (unaudited, in thousands) September 9, 2016 Purchase Price: Fair value of WesBanco shares issued $ 177,149 Cash consideration for outstanding YCB shares 43,349 Total purchase price $ 220,498 Fair value of: Tangible assets acquired $ 1,398,183 Core deposit and other intangible assets acquired 11,957 Liabilities assumed (1,330,887 ) Net cash received in the acquisition 48,212 Fair value of net assets acquired $ 127,465 Goodwill recognized $ 93,033 The following table presents the preliminary allocation of the purchase price of the assets acquired and the liabilities assumed at the date of acquisition. (unaudited, in thousands) September 9, 2016 Assets acquired Cash and due from banks $ 48,212 Securities 173,223 Loans 1,012,410 Goodwill and other intangible assets 104,990 Accrued income and other assets (1) 212,550 Total assets acquired $ 1,551,385 Liabilities assumed Deposits $ 1,193,010 Borrowings 123,001 Accrued expenses and other liabilities 14,876 Total liabilities assumed 1,330,887 Net assets acquired $ 220,498 (1) Includes receivables of $105.8 million from the sale of available-for-sale securities prior to the acquisition date. The following table presents the changes in the preliminary allocation of the purchase price of the assets acquired and the liabilities assumed at the date of the acquisition previously reported as of December 31, 2016: (unaudited, in thousands) September 9, 2016 Goodwill recognized as of December 31, 2016 $ 92,889 Change in fair value of net assets acquired: Assets Loans (1,156 ) Accrued income and other assets 743 Liabilities Borrowings — Accrued expenses and other liabilities 269 Fair value of net assets acquired $ (144 ) Increase in goodwill recognized 144 Goodwill recognized as of June 30, 2017 $ 93,033 While purchase accounting is substantially complete, there may be subsequent adjustments to other assets and other liabilities. The Company expects to finalize purchase accounting in the third quarter, or within one year of the date of the acquisition.

Earnings Per Common Share

Earnings Per Common Share	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Common Share	NOTE 3. EARNINGS PER COMMON SHARE Earnings per common share are calculated as follows: (unaudited, in thousands, except shares and per share amounts) For the Three Months Ended For the Six Months Ended 2017 2016 2017 2016 Numerator for both basic and diluted earnings per common share: Net income $ 26,341 $ 22,109 $ 52,228 $ 44,982 Denominator: Total average basic common shares outstanding 43,995,749 38,373,610 43,971,789 38,380,296 Effect of dilutive stock options and other stock compensation 65,672 36,783 75,023 34,626 Total diluted average common shares outstanding 44,061,421 38,410,393 44,046,812 38,414,922 Earnings per common share – basic $ 0.60 $ 0.58 $ 1.19 $ 1.17 Earnings per common share – diluted $ 0.60 $ 0.58 $ 1.19 $ 1.17 Options to purchase 117,550 shares and 186,350 shares at June 30, 2017 and 2016, respectively, were not included in the computation of net income per diluted share for the three months ended June 30, 2017 and 2016, respectively, because the exercise price was greater than the average market price of the common shares and, therefore, the effect would be antidilutive. All stock options were included in the computation of net income per diluted share for the six months ended June 30, 2017. Options to purchase 186,350 shares at June 30, 2016 were not included in the computation of net income per diluted share for the six months ended June 30, 2016 because the exercise price was greater than the average market price of the common shares and, therefore, the effect would be antidilutive. As of June 30, 2017, 24,000 shares of restricted stock were not included in the computation of net income per diluted share for the three and six months ended June 30, 2017 because the effect would be antidilutive. There were no antidilutive shares of restricted stock excluded from the computation of net income for the three or six months ended June 30, 2016. On September 9, 2016, WesBanco issued 5,423,348 shares of common stock (109,257 of which shares were treasury stock) to complete its acquisition of YCB. These shares are included in average shares outstanding beginning on that date. For additional information relating to the YCB acquisition, refer to Note 2, “Mergers and Acquisitions.”

Securities

Securities	6 Months Ended
	Jun. 30, 2017
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: June 30, 2017 December 31, 2016 (unaudited, in thousands) Amortized Gross Gross Estimated Value Amortized Gross Gross Estimated Value Available-for-sale U.S. Government sponsored entities and agencies $ 44,307 $ 9 $ (480 ) $ 43,836 $ 54,803 $ 3 $ (763 ) $ 54,043 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 938,425 811 (12,477 ) 926,759 953,475 884 (16,070 ) 938,289 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 116,584 90 (1,152 ) 115,522 98,922 27 (2,139 ) 96,810 Obligations of states and political subdivisions 110,020 3,358 (703 ) 112,675 110,208 3,114 (1,659 ) 111,663 Corporate debt securities 35,263 177 (101 ) 35,339 35,292 117 (108 ) 35,301 Total debt securities $ 1,244,599 $ 4,445 $ (14,913 ) $ 1,234,131 $ 1,252,700 $ 4,145 $ (20,739 ) $ 1,236,106 Equity securities 4,238 1,056 (5 ) 5,289 4,062 1,032 (24 ) 5,070 Total available-for-sale securities $ 1,248,837 $ 5,501 $ (14,918 ) $ 1,239,420 $ 1,256,762 $ 5,177 $ (20,763 ) $ 1,241,176 Held-to-maturity U.S. Government sponsored entities and agencies $ 12,319 $ — $ (296 ) $ 12,023 $ 13,394 $ — $ (414 ) $ 12,980 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 187,385 802 (1,638 ) 186,549 215,141 1,279 (2,563 ) 213,857 Obligations of states and political subdivisions 796,307 20,528 (1,289 ) 815,546 805,019 15,652 (5,529 ) 815,142 Corporate debt securities 34,383 889 (16 ) 35,256 34,413 418 (20 ) 34,811 Total held-to-maturity securities $ 1,030,394 $ 22,219 $ (3,239 ) $ 1,049,374 $ 1,067,967 $ 17,349 $ (8,526 ) $ 1,076,790 Total $ 2,279,231 $ 27,720 $ (18,157 ) $ 2,288,794 $ 2,324,729 $ 22,526 $ (29,289 ) $ 2,317,966 Trading securities, which consist of investments in various mutual funds held in grantor trusts formed in connection with the Company’s deferred compensation plan, are recorded at fair value and totaled $7.9 million and $7.1 million, at June 30, 2017 and December 31, 2016, respectively. At June 30, 2017 and December 31, 2016, there were no holdings of any one issuer, other than U.S. government sponsored entities 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 June 30, 2017. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date. June 30, 2017 (unaudited, in thousands) One Year One to Five to After Mortgage-backed Total Available-for-sale U.S. Government sponsored entities and agencies $ — $ 11,972 $ 16,849 $ 6,898 $ 8,117 $ 43,836 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 926,759 926,759 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 115,522 115,522 Obligations of states and political subdivisions 9,038 20,278 37,662 45,697 — 112,675 Corporate debt securities — 30,330 3,062 1,947 — 35,339 Equity securities (2) — — — — 5,289 5,289 Total available-for-sale securities $ 9,038 $ 62,580 $ 57,573 $ 54,542 $ 1,055,687 $ 1,239,420 Held-to-maturity (3) U.S. Government sponsored entities and agencies $ — $ — $ — $ — $ 12,023 $ 12,023 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 186,549 186,549 Obligations of states and political subdivisions 3,535 78,391 405,143 328,477 — 815,546 Corporate debt securities — 981 34,275 — — 35,256 Total held-to-maturity securities $ 3,535 $ 79,372 $ 439,418 $ 328,477 $ 198,572 $ 1,049,374 Total $ 12,573 $ 141,952 $ 496,991 $ 383,019 $ 1,254,259 $ 2,288,794 (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 $1.0 billion. Securities with aggregate fair values of $1.3 billion and $1.2 billion at June 30, 2017 and December 31, 2016, 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 $7.8 million and $109.6 million for the six months ended June 30, 2017 and 2016, respectively. Net unrealized losses on available-for-sale securities included in accumulated other comprehensive income net of tax, as of June 30, 2017 and December 31, 2016, were $5.9 million and $9.9 million, respectively. The following table presents the gross realized gains and losses on sales and calls of available-for-sale and held-to-maturity securities for the three and six months ended June 30, 2017 and 2016, respectively. Gains and losses due to fair value fluctuations on trading securities are included in non-interest income under other income, with an offsetting entry in compensation expense. For the Three For the Six June 30, June 30, (unaudited, in thousands) 2017 2016 2017 2016 Gross realized gains $ 562 $ 778 $ 574 $ 1,916 Gross realized losses (68 ) (193 ) (68 ) (220 ) Net realized gains $ 494 $ 585 $ 506 $ 1,696 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 June 30, 2017 and December 31, 2016: June 30, 2017 Less than 12 months 12 months or more Total (unaudited, dollars in thousands) Fair Value Unrealized # of Fair Unrealized # of Fair Value Unrealized # of U.S. Government sponsored entities and agencies $ 36,989 $ (744 ) 8 $ 9,968 $ (32 ) 1 $ 46,957 $ (776 ) 9 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 898,142 (11,884 ) 224 71,302 (2,231 ) 19 969,444 (14,115 ) 243 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 97,844 (1,135 ) 14 667 (17 ) 2 98,511 (1,152 ) 16 Obligations of states and political subdivisions 169,042 (1,954 ) 309 2,315 (38 ) 3 171,357 (1,992 ) 312 Corporate debt securities — — — 11,939 (117 ) 4 11,939 (117 ) 4 Equity securities 1,357 (5 ) 1 — — — 1,357 (5 ) 1 Total temporarily impaired securities $ 1,203,374 $ (15,722 ) 556 $ 96,191 $ (2,435 ) 29 $ 1,299,565 $ (18,157 ) 585 December 31, 2016 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 U.S. Government sponsored entities and agencies $ 58,108 $ (1,177 ) 11 $ — $ — — $ 58,108 $ (1,177 ) 11 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 969,174 (16,436 ) 232 58,839 (2,197 ) 14 1,028,013 (18,633 ) 246 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 88,169 (2,122 ) 14 679 (17 ) 2 88,848 (2,139 ) 16 Obligations of states and political subdivisions 364,583 (7,121 ) 604 2,047 (67 ) 3 366,630 (7,188 ) 607 Corporate debt securities 10,011 (78 ) 3 5,973 (50 ) 2 15,984 (128 ) 5 Equity securities 2,938 (24 ) 2 — — — 2,938 (24 ) 2 Total temporarily impaired securities $ 1,492,983 $ (26,958 ) 866 $ 67,538 $ (2,331 ) 21 $ 1,560,521 $ (29,289 ) 887 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 substantially all debt securities are rated above 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, Cincinnati and Indianapolis stock totaling $49.1 million and $46.4 million at June 30, 2017 and December 31, 2016, 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.

Loans and the Allowance for Cre

Loans and the Allowance for Credit Losses	6 Months Ended
	Jun. 30, 2017
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, and discounts on purchased loans. The deferred loan (costs) and fees were $(0.1) million and $0.3 million at June 30, 2017 and December 31, 2016, respectively. The unamortized discount on purchased loans from acquisitions was $25.0 million, including $12.7 million related to YCB, and $24.1 million at June 30, 2017 and December 31, 2016, respectively. (unaudited, in thousands) June 30, December 31, Commercial real estate: Land and construction $ 615,881 $ 496,539 Improved property 2,397,846 2,376,972 Total commercial real estate 3,013,727 2,873,511 Commercial and industrial 1,136,195 1,088,118 Residential real estate 1,363,579 1,383,390 Home equity 516,612 508,359 Consumer 360,304 396,058 Total portfolio loans 6,390,417 6,249,436 Loans held for sale 21,677 17,315 Total loans $ 6,412,094 $ 6,266,751 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 Six Months Ended June 30, 2017 and 2016 (unaudited, in thousands) Commercial Commercial Commercial Residential Home Consumer Deposit Total Balance at December 31, 2016: Allowance for loan losses $ 4,348 $ 18,628 $ 8,412 $ 4,106 $ 3,422 $ 3,998 $ 760 $ 43,674 Allowance for loan commitments 151 17 188 9 162 44 — 571 Total beginning allowance for credit losses 4,499 18,645 8,600 4,115 3,584 4,042 760 44,245 Provision for credit losses: Provision for loan losses 1,039 558 1,552 39 466 970 444 5,068 Provision for loan commitments 14 1 (9 ) 1 17 2 — 26 Total provision for credit losses 1,053 559 1,543 40 483 972 444 5,094 Charge-offs — (1,574 ) (1,205 ) (592 ) (293 ) (1,965 ) (611 ) (6,240 ) Recoveries 70 376 475 164 151 990 181 2,407 Net charge-offs 70 (1,198 ) (730 ) (428 ) (142 ) (975 ) (430 ) (3,833 ) Balance at June 30, 2017: Allowance for loan losses 5,457 17,988 9,234 3,717 3,746 3,993 774 44,909 Allowance for loan commitments 165 18 179 10 179 46 — 597 Total ending allowance for credit losses $ 5,622 $ 18,006 $ 9,413 $ 3,727 $ 3,925 $ 4,039 $ 774 $ 45,506 Balance at December 31, 2015: Allowance for loan losses $ 4,390 $ 14,748 $ 10,002 $ 4,582 $ 2,883 $ 4,763 $ 342 $ 41,710 Allowance for loan commitments 157 26 260 7 117 46 — 613 Total beginning allowance for credit losses 4,547 14,774 10,262 4,589 3,000 4,809 342 42,323 Provision for credit losses: Provision for loan losses 1,252 (559 ) 1,999 (172 ) 164 898 581 4,163 Provision for loan commitments (10 ) (13 ) (16 ) 1 10 — — (28 ) Total provision for credit losses 1,242 (572 ) 1,983 (171 ) 174 898 581 4,135 Charge-offs — (1,328 ) (765 ) (386 ) (216 ) (2,089 ) (362 ) (5,146 ) Recoveries 3 1,168 139 306 77 790 118 2,601 Net charge-offs 3 (160 ) (626 ) (80 ) (139 ) (1,299 ) (244 ) (2,545 ) Balance at June 30, 2016: Allowance for loan losses 5,645 14,029 11,375 4,330 2,908 4,362 679 43,328 Allowance for loan commitments 147 13 244 8 127 46 — 585 Total ending allowance for credit losses $ 5,792 $ 14,042 $ 11,619 $ 4,338 $ 3,035 $ 4,408 $ 679 $ 43,913 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 Commercial Commercial and Residential Estate Home Consumer Deposit Total June 30, 2017 Allowance for credit losses: Allowance for loans individually evaluated for impairment $ — $ 897 $ — $ — $ — $ — $ — $ 897 Allowance for loans collectively evaluated for impairment 5,457 17,091 9,234 3,717 3,746 3,993 774 44,012 Allowance for loan commitments 165 18 179 10 179 46 — 597 Total allowance for credit losses $ 5,622 $ 18,006 $ 9,413 $ 3,727 $ 3,925 $ 4,039 $ 774 $ 45,506 Portfolio loans: Individually evaluated for impairment (1) $ — $ 5,156 $ — $ — $ — $ — $ — $ 5,156 Collectively evaluated for impairment 614,353 2,385,876 1,135,243 1,362,813 516,612 360,297 — 6,375,194 Acquired with deteriorated credit quality 1,528 6,814 952 766 — 7 — 10,067 Total portfolio loans $ 615,881 $ 2,397,846 $ 1,136,195 $ 1,363,579 $ 516,612 $ 360,304 $ — $ 6,390,417 December 31, 2016 Allowance for credit losses: Allowance for loans individually evaluated for impairment $ — $ 470 $ 407 $ — $ — $ — $ — $ 877 Allowance for loans collectively evaluated for impairment 4,348 18,158 8,005 4,106 3,422 3,998 760 42,797 Allowance for loan commitments 151 17 188 9 162 44 — 571 Total allowance for credit losses $ 4,499 $ 18,645 $ 8,600 $ 4,115 $ 3,584 $ 4,042 $ 760 $ 44,245 Portfolio loans: Individually evaluated for impairment (1) $ — $ 3,012 $ 1,270 $ — $ — $ — $ — $ 4,282 Collectively evaluated for impairment 494,928 2,364,067 1,086,445 1,382,447 508,359 396,049 — 6,232,295 Acquired with deteriorated credit quality 1,611 9,893 403 943 — 9 — 12,859 Total portfolio loans $ 496,539 $ 2,376,972 $ 1,088,118 $ 1,383,390 $ 508,359 $ 396,058 $ — $ 6,249,436 (1) Commercial loans greater than $1 million that are reported as non-accrual or as a troubled debt restructuring (“TDR”) 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 Commercial Commercial Total Commercial As of June 30, 2017 Pass $ 609,309 $ 2,341,928 $ 1,118,983 $ 4,070,220 Criticized - compromised 3,910 26,046 9,278 39,234 Classified - substandard 2,662 29,872 7,934 40,468 Classified - doubtful — — — — Total $ 615,881 $ 2,397,846 $ 1,136,195 $ 4,149,922 As of December 31, 2016 Pass $ 489,380 $ 2,324,755 $ 1,072,751 $ 3,886,886 Criticized - compromised 4,405 15,295 5,078 24,778 Classified - substandard 2,754 36,922 10,289 49,965 Classified - doubtful — — — — Total $ 496,539 $ 2,376,972 $ 1,088,118 $ 3,961,629 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 $20.4 million at June 30, 2017 and $20.6 million at December 31, 2016, of which $3.4 million were accruing, for each period. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard are not included in the tables above. Acquired YCB Loans Acquired ESB Loans The following table provides changes in accretable yield for loans acquired with deteriorated credit quality: For the Six Months Ended (unaudited, in thousands) June 30, June 30, Balance at beginning of period $ 1,717 $ 1,206 Acquisitions — — Reclass from non-accretable difference 738 1,064 Transfers (216 ) (328 ) Accretion (279 ) (266 ) Balance at end of period $ 1,960 $ 1,676 The following tables summarize the age analysis of all categories of loans: Age Analysis of Loans (unaudited, in thousands) Current 30-59 Days 60-89 Days 90 Days Total Total Loans 90 Days (1) As of June 30, 2017 Commercial real estate: Land and construction $ 611,756 $ 3,817 $ 27 $ 281 $ 4,125 $ 615,881 $ — Improved property 2,385,823 777 1,499 9,747 12,023 2,397,846 808 Total commercial real estate 2,997,579 4,594 1,526 10,028 16,148 3,013,727 808 Commercial and industrial 1,131,611 979 847 2,758 4,584 1,136,195 30 Residential real estate 1,350,915 1,568 3,176 7,920 12,664 1,363,579 1,472 Home equity 509,747 2,478 419 3,968 6,865 516,612 1,284 Consumer 355,665 2,853 1,002 784 4,639 360,304 616 Total portfolio loans 6,345,517 12,472 6,970 25,458 44,900 6,390,417 4,210 Loans held for sale 21,677 — — — — 21,677 — Total loans $ 6,367,194 $ 12,472 $ 6,970 $ 25,458 $ 44,900 $ 6,412,094 $ 4,210 Impaired loans included above are as follows: Non-accrual loans $ 12,301 $ 352 $ 2,353 $ 21,229 $ 23,934 $ 36,235 TDRs accruing interest (1) 6,690 48 84 19 151 6,841 Total impaired $ 18,991 $ 400 $ 2,437 $ 21,248 $ 24,085 $ 43,076 As of December 31, 2016 Commercial real estate: Land and construction $ 496,245 $ — $ — $ 294 $ 294 $ 496,539 $ — Improved property 2,367,790 1,154 363 7,665 9,182 2,376,972 318 Total commercial real estate 2,864,035 1,154 363 7,959 9,476 2,873,511 318 Commercial and industrial 1,082,390 2,508 1,011 2,209 5,728 1,088,118 229 Residential real estate 1,365,956 6,701 1,043 9,690 17,434 1,383,390 1,922 Home equity 502,087 2,358 862 3,052 6,272 508,359 626 Consumer 390,354 3,674 1,149 881 5,704 396,058 644 Total portfolio loans 6,204,822 16,395 4,428 23,791 44,614 6,249,436 3,739 Loans held for sale 17,315 — — — — 17,315 — Total loans $ 6,222,137 $ 16,395 $ 4,428 $ 23,791 $ 44,614 $ 6,266,751 $ 3,739 Impaired loans included above are as follows: Non-accrual loans $ 7,570 $ 3,479 $ 923 $ 19,812 $ 24,214 $ 31,784 TDRs accruing interest (1) 7,014 342 50 240 632 7,646 Total impaired $ 14,584 $ 3,821 $ 973 $ 20,052 $ 24,846 $ 39,430 (1) Loans 90 days or more past due and accruing interest exclude TDRs 90 days or more past due and accruing interest. The following tables summarize impaired loans: Impaired Loans June 30, 2017 December 31, 2016 (unaudited, in thousands) Unpaid (1) Recorded Related Unpaid (1) Recorded Related With no related specific allowance recorded: Commercial real estate: Land and construction $ 588 $ 413 $ — $ 1,212 $ 766 $ — Improved property 16,234 11,136 — 9,826 8,141 — Commercial and industrial 10,613 4,092 — 4,456 3,181 — Residential real estate 18,645 16,983 — 20,152 18,305 — Home equity 5,247 4,608 — 4,589 4,011 — Consumer 804 688 — 884 744 — Total impaired loans without a specific allowance 52,131 37,920 — 41,119 35,148 — With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — Improved property 5,156 5,156 897 3,012 3,012 470 Commercial and industrial — — — 4,875 1,270 407 Total impaired loans with a specific allowance 5,156 5,156 897 7,887 4,282 877 Total impaired loans $ 57,287 $ 43,076 $ 897 $ 49,006 $ 39,430 $ 877 (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 Six Months Ended June 30, 2017 June 30, 2016 June 30, 2017 June 30, 2016 (unaudited, in thousands) Average Interest Average Interest Average Interest Average Interest With no related specific allowance recorded: Commercial real estate: Land and construction $ 411 $ — $ 840 $ 8 $ 529 $ — $ 1,223 $ 14 Improved Property 11,118 23 9,846 96 10,125 369 10,084 180 Commercial and industrial 4,268 2 3,303 52 3,905 4 3,362 93 Residential real estate 17,787 66 16,830 194 17,959 135 16,783 433 Home equity 4,485 5 3,428 28 4,327 10 3,296 52 Consumer 733 1 853 17 737 3 1,000 35 Total impaired loans without a specific allowance 38,802 97 35,100 395 37,582 521 35,748 807 With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — — — Improved Property 5,999 — 3,012 — 5,003 — 3,012 — Commercial and industrial — — 4,312 26 423 — 4,498 58 Total impaired loans with a specific allowance 5,999 — 7,324 26 5,426 — 7,510 58 Total impaired loans $ 44,801 $ 97 $ 42,424 $ 421 $ 43,008 $ 521 $ 43,258 $ 865 The following tables present the recorded investment in non-accrual loans and TDRs: Non-accrual Loans (1) (unaudited, in thousands) June 30, December 31, Commercial real estate: Land and construction $ 413 $ 766 Improved property 14,859 9,535 Total commercial real estate 15,272 10,301 Commercial and industrial 3,955 4,299 Residential real estate 12,225 12,994 Home equity 4,171 3,538 Consumer 612 652 Total $ 36,235 $ 31,784 (1) At June 30, 2017, there were three borrowers with loans greater than $1.0 million totaling $8.7 million, as compared to two borrowers totaling $4.3 million at December 31, 2016. 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 June 30, 2017 December 31, 2016 (unaudited, in thousands) Accruing Non-Accrual Total Accruing Non-Accrual Total Commercial real estate: Land and construction $ — $ 6 $ 6 $ — $ 8 $ 8 Improved property 1,433 528 1,961 1,618 688 2,306 Total commercial real estate 1,433 534 1,967 1,618 696 2,314 Commercial and industrial 137 237 374 152 151 303 Residential real estate 4,758 1,902 6,660 5,311 2,212 7,523 Home equity 437 337 774 473 297 770 Consumer 76 148 224 92 190 282 Total $ 6,841 $ 3,158 $ 9,999 $ 7,646 $ 3,546 $ 11,192 As of June 30, 2017 and December 31, 2016, there were no 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 and six months. WesBanco had no unfunded commitments to debtors whose loans were classified as impaired as of June 30, 2017 or December 31, 2016. The following tables present details related to loans identified as TDRs during the three and six months ended June 30, 2017 and 2016, respectively: New TDRs (1) For the Three Months Ended June 30, 2017 June 30, 2016 (unaudited, dollars in thousands) Number of Pre- Post- Number of Pre- Post- Commercial real estate: Land and construction — $ — $ — — $ — $ — Improved Property — — — — — — Total commercial real estate — — — — — — Commercial and industrial — — — — — — Residential real estate 1 11 10 1 23 22 Home equity 1 44 44 1 43 42 Consumer 2 22 20 6 38 34 Total 4 $ 77 $ 74 8 $ 104 $ 98 (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 Six Months Ended June 30, 2017 June 30, 2016 (unaudited, dollars in thousands) Number of Pre- Post- Number of Pre- Post- Commercial real estate: Land and construction — $ — $ — — $ — $ — Improved Property — — — — — — Total commercial real estate — — — — — — Commercial and industrial 2 125 120 — — — Residential real estate 2 22 18 1 23 22 Home equity 1 45 44 1 44 42 Consumer 3 34 29 6 41 34 Total 8 $ 226 $ 211 8 $ 108 $ 98 (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 table summarizes TDRs which defaulted (defined as past due 90 days) during the six months ended June 30, 2017 and 2016, respectively, that were restructured within the last twelve months prior to June 30, 2017 and 2016, respectively: Defaulted TDRs (1) For the Six Months Ended June 30, 2017 June 30, 2016 (unaudited, dollars in thousands) Number of Recorded Number of Recorded Commercial real estate: Land and construction — $ — — $ — Improved property — — — — Total commercial real estate — — — — Commercial and industrial — — 1 40 Residential real estate — — — — Home equity — — — — Consumer — — — — Total — $ — 1 $ 40 (1) Excludes loans that were either charged-off or cured by period end. The recorded investment is as of June 30, 2017 and 2016, respectively. TDRs that default are placed on non-accrual status unless they are both well-secured and in the process of collection. The loan in the table above was not accruing interest. The following table summarizes other real estate owned and repossessed assets included in other assets: (unaudited, in thousands) June 30, December 31, Other real estate owned $ 6,654 $ 8,206 Repossessed assets 69 140 Total other real estate owned and repossessed assets $ 6,723 $ 8,346 At June 30, 2017, other real estate owned includes $2.0 million from the YCB acquisition and $3.1 million at December 31, 2016. Residential real estate included in other real estate owned at June 30, 2017 and December 31, 2016 was $1.7 million and $1.6 million, respectively. At June 30, 2017 and December 31, 2016, formal foreclosure proceedings were in process on residential real estate loans totaling $2.3 million and $4.1 million, respectively.

Pension Plan

Pension Plan	6 Months Ended
	Jun. 30, 2017
Retirement Benefits [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 Six Months Ended (unaudited, in thousands) 2017 2016 2017 2016 Service cost – benefits earned during year $ 643 $ 696 $ 1,279 $ 1,392 Interest cost on projected benefit obligation 1,096 1,209 2,180 2,533 Expected return on plan assets (1,907 ) (1,919 ) (3,793 ) (3,838 ) Amortization of prior service cost 6 6 12 12 Amortization of net loss 803 808 1,597 1,502 Net periodic pension cost $ 641 $ 800 $ 1,275 $ 1,601 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 $2.7 million is due for 2017, which could be all or partially offset by the Plan’s $46.9 million available credit balance. A voluntary contribution of $2.5 million was made in June 2017. On September 9, 2016, WesBanco assumed YCB’s obligation for a predecessor bank’s participation in the Pentegra Defined Benefit Plan for Financial Institutions (“Pentegra Plan”). The participating employer plan had been frozen to new participants since 2002. WesBanco spun out the assets from the Pentegra Plan in the second quarter of 2017, and contributed approximately $2.8 million to satisfy the final costs to do so. The spin off had no impact on earnings as the liability was included in YCB’s balance sheet as of the acquisition date. The $8.4 million in distributed assets from the Pentegra Plan were transferred to a new plan providing the same benefits to the participants.

Fair Value Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2017
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: Investment securities: Derivatives: WesBanco determines the fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity, and uses observable market based inputs, including interest rate curves and implied volatilities. WesBanco incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements. We may be required from time to time to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower of cost or market accounting or write-downs of individual assets and liabilities. Impaired loans: Other real estate owned and repossessed assets: Loans held for sale: Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in the table below are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position. 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 June 30, 2017 and December 31, 2016: June 30, 2017 Fair Value Measurements Using: June 30, Quoted Prices in Significant Significant Investments (unaudited, in thousands) (level 1) (level 2) (level 3) Value Recurring fair value measurements Trading securities $ 7,880 $ 6,483 $ — $ — $ 1,397 Securities - available-for-sale U.S. Government sponsored entities and agencies 43,836 — 43,836 — — Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 926,759 — 926,759 — — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 115,522 — 115,522 — — Obligations of state and political subdivisions 112,675 — 112,675 — — Corporate debt securities 35,339 — 35,339 — — Equity securities 5,289 3,149 2,140 — — Total securities - available-for-sale $ 1,239,420 $ 3,149 $ 1,236,271 $ — $ — Other assets - interest rate derivatives agreements $ 5,666 $ — $ 5,666 $ — $ — Total assets recurring fair value measurements $ 1,252,966 $ 9,632 $ 1,241,937 $ — $ 1,397 Other liabilities - interest rate derivatives agreements $ 5,572 $ — $ 5,572 $ — $ — Total liabilities recurring fair value measurements $ 5,572 $ — $ 5,572 $ — $ — Nonrecurring fair value measurements Impaired loans $ 4,259 $ — $ — $ 4,259 $ — Other real estate owned and repossessed assets 6,723 — — 6,723 — Loans held for sale 21,677 — 21,677 — — Total nonrecurring fair value measurements $ 32,659 $ — $ 21,677 $ 10,982 $ — December 31, 2016 Fair Value Measurements Using: December 31, Quoted Prices in Significant Significant Investments (unaudited, in thousands) (level 1) (level 2) (level 3) Value Recurring fair value measurements Trading securities $ 7,071 $ 5,633 $ — $ — $ 1,438 Securities - available-for-sale U.S. Government sponsored entities and agencies 54,043 — 54,043 — — Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 938,289 — 938,289 — — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 96,810 — 96,810 — — Obligations of state and political subdivisions 111,663 — 111,663 — — Corporate debt securities 35,301 — 35,301 — — Equity securities 5,070 2,938 2,132 — — Total securities - available-for-sale $ 1,241,176 $ 2,938 $ 1,238,238 $ — $ — Other assets - interest rate derivatives agreements $ 5,596 $ — $ 5,596 $ — $ — Total assets recurring fair value measurements $ 1,253,843 $ 8,571 $ 1,243,834 $ — $ 1,438 Other liabilities - interest rate derivatives agreements $ 5,199 $ — $ 5,199 $ — $ — Total liabilities recurring fair value measurements $ 5,199 $ — $ 5,199 $ — $ — Nonrecurring fair value measurements Impaired loans $ 3,405 $ — $ — $ 3,405 $ — Other real estate owned and repossessed assets 8,346 — — 8,346 — Loans held for sale 17,315 — 17,315 — — Total nonrecurring fair value measurements $ 29,066 $ — $ 17,315 $ 11,751 $ — 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 three and six months ended June 30, 2017 or for the year ended December 31, 2016. 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 Fair Value Valuation Unobservable Range (Weighted (unaudited, in thousands) Estimate Techniques Input Average) June 30, 2017 Impaired loans $ 4,259 Appraisal of collateral (1) Appraisal adjustments (2) 0% to (4.8%) / (2.0%) Liquidation expenses (2) (7.6%) to (8.0%) / (7.8%) Other real estate owned and repossessed assets 6,723 Appraisal of collateral (1), (3) December 31, 2016: Impaired loans $ 3,405 Appraisal of collateral (1) Appraisal adjustments (2) 0% to (70.0%) / (36.6%) Liquidation expenses (2) (1.5%) to (8.0%) / (4.6%) Other real estate owned and repossessed assets 8,346 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 June 30, 2017 (unaudited, in thousands) Carrying Fair Value Quoted Prices in (level 1) Significant Other (level 2) Significant (level 3) Investments Financial Assets Cash and due from banks $ 110,695 $ 110,695 $ 110,695 $ — $ — $ — Trading securities 7,880 7,880 6,483 — — 1,397 Securities available-for-sale 1,239,420 1,239,420 3,149 1,236,271 — — Securities held-to-maturity 1,030,394 1,049,374 — 1,048,782 592 — Net loans 6,345,508 6,239,814 — — 6,239,814 — Loans held for sale 21,677 21,677 — 21,677 — — Other assets - interest rate derivatives 5,666 5,666 — 5,666 — — Accrued interest receivable 28,501 28,501 28,501 — — — Financial Liabilities Deposits 7,072,473 7,083,413 5,686,701 1,396,712 — — Federal Home Loan Bank borrowings 1,021,592 1,020,403 — 1,020,403 — — Other borrowings 167,671 167,663 165,565 2,098 — — Subordinated debt and junior subordinated debt 164,228 134,420 — 134,420 — — Other liabilities - interest rate derivatives 5,572 5,572 — 5,572 — — Accrued interest payable 2,407 2,407 2,407 — — — Fair Value Measurements at December 31, 2016 (unaudited, in thousands) Carrying Fair Value Quoted Prices in (level 1) Significant Other (level 2) Significant (level 3) Investments Financial Assets Cash and due from banks $ 128,170 $ 128,170 $ 128,170 $ — $ — $ — Trading securities 7,071 7,071 5,633 — — 1,438 Securities available-for-sale 1,241,176 1,241,176 2,938 1,238,238 — — Securities held-to-maturity 1,067,967 1,076,790 — 1,076,189 601 — Net loans 6,205,762 6,073,558 — — 6,073,558 — Loans held for sale 17,315 17,315 — 17,315 — — Other assets - interest rate derivatives 5,596 5,596 — 5,596 — — Accrued interest receivable 28,299 28,299 28,299 — — — Financial Liabilities Deposits 7,040,879 7,052,501 5,545,057 1,507,444 — — Federal Home Loan Bank borrowings 968,946 974,430 — 974,430 — — Other borrowings 199,376 199,385 197,164 2,221 — — Subordinated debt and junior subordinated debt 163,598 134,859 — 134,859 — — Other liabilities - interest rate derivatives 5,199 5,199 — 5,199 — — Accrued interest payable 2,204 2,204 2,204 — — — 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: Securities held-to-maturity: Net loans: Accrued interest receivable: Deposits: Federal Home Loan Bank borrowings: Other borrowings: Subordinated debt and junior subordinated debt: Accrued interest payable: Off-balance sheet financial instruments:

Comprehensive Income

Comprehensive Income	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Comprehensive Income	NOTE 8. COMPREHENSIVE INCOME The activity in accumulated other comprehensive income for the three and six months ended June 30, 2017 and 2016 is as follows: Accumulated Other Comprehensive Income/(Loss) (1) (unaudited, in thousands) Defined Unrealized Available-for-Sale Unrealized Gains Available-for-Sale to Held-to-Maturity Total Balance at December 31, 2016 $ (17,758 ) $ (9,890 ) $ 522 $ (27,126 ) Other comprehensive income before reclassifications — 3,932 — 3,932 Amounts reclassified from accumulated other comprehensive income 1,164 35 (123 ) 1,076 Period change 1,164 3,967 (123 ) 5,008 Balance at June 30, 2017 $ (16,594 ) $ (5,923 ) $ 399 $ (22,118 ) Balance at December 31, 2015 $ (17,539 ) $ (4,162 ) $ 747 $ (20,954 ) Other comprehensive income before reclassifications — 18,100 — 18,100 Amounts reclassified from accumulated other comprehensive income 921 (1,061 ) (103 ) (243 ) Period change 921 17,039 (103 ) 17,857 Balance at June 30, 2016 $ (16,618 ) $ 12,877 $ 644 $ (3,097 ) (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 six months ended June 30, 2017 and 2016: Details about Accumulated Other Comprehensive For the Three Months Ended June 30, For the Six Months Ended June 30, Affected Line Item in the Statement of Net Income (unaudited, in thousands) 2017 2016 2017 2016 Securities available-for-sale (1) Net securities gains/losses reclassified into earnings $ 55 $ (618 ) $ 55 $ (1,672 ) Net securities gains (Non-interest income) Related income tax benefit (20 ) 226 (20 ) 611 Provision for income taxes Net effect on accumulated other comprehensive income for the period 35 (392 ) 35 (1,061 ) Securities held-to-maturity (1) Amortization of unrealized gain transferred from available-for-sale (118 ) (84 ) (189 ) (165 ) Interest and dividends on securities (Interest and dividend income) Related income tax expense 44 31 66 62 Provision for income taxes Net effect on accumulated other comprehensive income for the period (74 ) (53 ) (123 ) (103 ) Defined benefit pension plan (2) Amortization of net loss and prior service costs 809 815 1,610 1,514 Employee benefits (Non-interest expense) Related income tax benefit (300 ) (298 ) (446 ) (593 ) Provision for income taxes Net effect on accumulated other comprehensive income for the period 509 517 1,164 921 Total reclassifications for the period $ 470 $ 72 $ 1,076 $ (243 ) (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.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	6 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	NOTE 9. COMMITMENTS AND CONTINGENT LIABILITIES Commitments — 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 June 30, 2017 and December 31, 2016. Contingent obligations to purchase loans funded by other entities include affordable housing plan guarantees, credit card guarantees and mortgages sold into the secondary market with recourse. 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: June 30, December 31, (unaudited, in thousands) 2017 2016 Lines of credit $ 1,483,500 $ 1,418,329 Loans approved but not closed 228,118 185,253 Overdraft limits 126,459 126,517 Letters of credit 31,260 32,907 Contingent obligations to purchase loans funded by other entities 8,945 13,036 Contingent Liabilities —

Business Segments

Business Segments	6 Months Ended
	Jun. 30, 2017
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 $3.8 billion and $3.7 billion at June 30, 2017 and 2016, 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: Trust and Community Investment (unaudited, in thousands) Banking Services Consolidated For the Three Months ended June 30, 2017: Interest and dividend income $ 82,160 $ — $ 82,160 Interest expense 10,021 — 10,021 Net interest income 72,139 — 72,139 Provision for credit losses 2,383 — 2,383 Net interest income after provision for credit losses 69,756 — 69,756 Non-interest income 16,550 5,572 22,122 Non-interest expense 52,754 3,130 55,884 Income before provision for income taxes 33,552 2,442 35,994 Provision for income taxes 8,676 977 9,653 Net income $ 24,876 $ 1,465 $ 26,341 For the Three Months ended June 30, 2016: Interest and dividend income $ 67,585 $ — $ 67,585 Interest expense 7,811 — 7,811 Net interest income 59,774 — 59,774 Provision for credit losses 1,811 — 1,811 Net interest income after provision for credit losses 57,963 — 57,963 Non-interest income 14,555 5,036 19,591 Non-interest expense 44,396 2,964 47,360 Income before provision for income taxes 28,122 2,072 30,194 Provision for income taxes 7,256 829 8,085 Net income $ 20,866 $ 1,243 $ 22,109 For the Six Months ended June 30, 2017: Interest and dividend income $ 162,084 $ — $ 162,084 Interest expense 19,226 — 19,226 Net interest income 142,858 — 142,858 Provision for credit losses 5,094 — 5,094 Net interest income after provision for credit losses 137,764 — 137,764 Non-interest income 33,290 11,716 45,006 Non-interest expense 103,746 6,522 110,268 Income before provision for income taxes 67,308 5,194 72,502 Provision for income taxes 18,196 2,078 20,274 Net income $ 49,112 $ 3,116 $ 52,228 For the Six Months ended June 30, 2016: Interest and dividend income $ 135,186 $ — $ 135,186 Interest expense 15,571 — 15,571 Net interest income 119,615 — 119,615 Provision for credit losses 4,135 — 4,135 Net interest income after provision for credit losses 115,480 — 115,480 Non-interest income 28,237 10,747 38,984 Non-interest expense 86,461 6,242 92,703 Income before provision for income taxes 57,256 4,505 61,761 Provision for income taxes 14,977 1,802 16,779 Net income $ 42,279 $ 2,703 $ 44,982 Total non-fiduciary assets of the trust and investment services segment were $1.6 million and $3.2 million at June 30, 2017 and 2016, respectively. All other assets, including goodwill and other intangible assets, were allocated to the community banking segment.

Summary of Significant Accoun18

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation — 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 2016 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 March 2017, FASB issued ASU 2017-08 that shortens the amortization period of certain callable debt securities held at a premium. The premium is required to be amortized to the earliest call date. Securities held at a discount continue to be amortized to maturity. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, which for WesBanco will be effective for the fiscal year beginning January 1, 2019. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements. In March 2017, the FASB issued ASU 2017-07 that changes how employer-sponsored defined benefit pension and/or other postretirement benefit plans present the net periodic benefit cost in the income statement. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Only the service cost component will be eligible for capitalization in assets. Employers will present the other components of the net periodic benefit cost separately from the line items that includes the service cost outside of any subtotal of operating income, if one is presented. These components will not be eligible for capitalization in assets. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual period (i.e., only in the first interim period). For WesBanco, this update will be effective for the fiscal year beginning January 1, 2018. Upon adoption, WesBanco will reclassify the service cost component from employee benefits to salaries and wages, which are both components of non-interest expense. The service cost component for the three and six months ending June 30, 2017 was $0.6 million and $1.3 million, respectively. In January 2017, the FASB issued ASU 2017-04 that eliminated the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value. Public business entities that are a U.S. Securities and Exchange Commission filer should adopt this update for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019, which for WesBanco will be effective for the fiscal year beginning January 1, 2020. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements. In January 2017, the FASB issued ASU No. 2017-01, which clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, which for WesBanco will be effective for the fiscal year beginning January 1, 2018. WesBanco is currently evaluating the potential impact of ASU 2017-01 but it is not expected that the adoption of this new standard will have a material impact on WesBanco’s Consolidated Financial Statements. In October 2016, the FASB issued ASU 2016-16 that provides the recognition of income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Current guidance prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in generally accepted accounting principles. The exception has led to diversity in practice and is a source of complexity in financial reporting. FASB decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this update eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments in this update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, which for WesBanco will be effective for the fiscal year beginning January 1, 2018. The amendments in this update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements. In August 2016, the FASB issued ASU 2016-15 that provides guidance for the classification of cash flows related to (1) debt prepayment or extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon rates that are insignificant in relation to the effective interest rate on the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions and (8) separately identifiable cash flows and application of the predominance principle. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, which for WesBanco will be effective for the fiscal year beginning January 1, 2018. Early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on WesBanco’s Consolidated Financial Statements. In June 2016, the FASB issued ASU 2016-13 that will require entities to use a new forward-looking “expected loss” model on trade and other receivables, held-to-maturity debt securities, loans and other instruments that generally will result in the earlier recognition of allowances for credit losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. Entities will have to disclose significantly more information, including information they use to track credit quality by year of origination for most financing receivables. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, which for WesBanco will be effective for the fiscal year beginning January 1, 2020. Early adoption is permitted for fiscal years beginning after December 15, 2018. WesBanco is currently evaluating the impact of the adoption of this pronouncement on WesBanco’s Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-09 that will require all excess income tax benefits or tax deficiencies of stock awards to be recognized in the income statement when the awards vest or are settled. It also will allow an employer to repurchase more of an employee’s shares than it can today for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-07 that eliminates the requirement to retrospectively apply the equity method in previous periods when an investor initially obtains significant influence over an investee. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2016, and requires prospective adoption. Early adoption is permitted. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements. In February 2016, the FASB issued ASU 2016-02 that will require entities to recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. The principal difference from previous guidance is that the lease assets and lease liabilities arising from operating leases were not previously recognized in the balance sheet. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. WesBanco is currently evaluating the impact of the adoption of this pronouncement on WesBanco’s Consolidated Financial Statements. In January 2016, the FASB issued ASU 2016-01 that will require entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value and recognize any changes in fair value in net income unless the investments qualify for the new practicability exception. The standard does not change the guidance for classifying and measuring investments in debt securities and loans. Entities will have to record changes in instrument-specific credit risk for financial liabilities measured under the fair value option in other comprehensive income. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within 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 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. 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. In March 2016, the FASB issued ASU 2016-08, which amends the principle versus agent guidance in the revenue standard. In April 2016, the FASB issued ASU 2016-10, which clarifies when promised goods or services are separately identifiable in the revenue standard. In May 2016, FASB issued ASU 2016-12, which provides narrow-scope improvements and practical expedients to the revenue standard. While WesBanco is currently evaluating the impact of this standard on individual customer contracts, management has evaluated the impact of this standard on the broad categories of its customer contracts and revenue streams. WesBanco currently anticipates this standard will not have a material impact on its Consolidated Financial Statements because revenue related to financial instruments, including loans and investment securities are not in scope of these updates. Loan interest income, investment interest income, insurance services revenue and BOLI are accounted for under other U.S. GAAP standards and are therefore, out of scope of the ASC 606 revenue standard. Trust fees, service charges on deposits, electronic banking fees, net securities brokerage revenue, net gains on sales of mortgage loans, and net gain on other real estate owned and other assets are in scope of the ASC 606 revenue standard. The Company is currently reviewing contracts related to these revenue streams. The Company does not anticipate any material changes to revenue recognition; however, the Company’s review is still ongoing. The Company plans to adopt the revenue recognition standard as of January 1, 2018. In January 2014, the FASB issued ASU No. 2014-01, which applies to all reporting entities that invest in qualified affordable housing projects through limited liability entities. The pronouncement permits reporting entities to make an accounting policy election to account for these investments using the proportional amortization method if certain conditions exist. The pronouncement also requires disclosure that enables users of its financial statements to understand the nature of these investments in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The pronouncement is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. WesBanco made an accounting policy election to adopt the ASU in the first quarter of 2017. With the adoption of this pronouncement, WesBanco now classifies the amortization of the investment as a component of income tax expense (benefit). The amount for the three and six months ending June 30, 2017 was $0.3 million and $0.8 million, respectively, which is included in income tax expense within WesBanco’s Consolidated Financial Statements.

Mergers and Acquisitions (Table

Mergers and Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2017
Preliminary Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The following table presents the preliminary allocation of the purchase price of the assets acquired and the liabilities assumed at the date of acquisition. (unaudited, in thousands) September 9, 2016 Assets acquired Cash and due from banks $ 48,212 Securities 173,223 Loans 1,012,410 Goodwill and other intangible assets 104,990 Accrued income and other assets (1) 212,550 Total assets acquired $ 1,551,385 Liabilities assumed Deposits $ 1,193,010 Borrowings 123,001 Accrued expenses and other liabilities 14,876 Total liabilities assumed 1,330,887 Net assets acquired $ 220,498 (1) Includes receivables of $105.8 million from the sale of available-for-sale securities prior to the acquisition date.
Your Community Bankshares, Inc [Member]
Preliminary Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The purchase price of the YCB acquisition and resulting goodwill is summarized as follows: (unaudited, in thousands) September 9, 2016 Purchase Price: Fair value of WesBanco shares issued $ 177,149 Cash consideration for outstanding YCB shares 43,349 Total purchase price $ 220,498 Fair value of: Tangible assets acquired $ 1,398,183 Core deposit and other intangible assets acquired 11,957 Liabilities assumed (1,330,887 ) Net cash received in the acquisition 48,212 Fair value of net assets acquired $ 127,465 Goodwill recognized $ 93,033
Purchase Price Allocation Adjustment [Member]
Preliminary Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The following table presents the changes in the preliminary allocation of the purchase price of the assets acquired and the liabilities assumed at the date of the acquisition previously reported as of December 31, 2016: (unaudited, in thousands) September 9, 2016 Goodwill recognized as of December 31, 2016 $ 92,889 Change in fair value of net assets acquired: Assets Loans (1,156 ) Accrued income and other assets 743 Liabilities Borrowings — Accrued expenses and other liabilities 269 Fair value of net assets acquired $ (144 ) Increase in goodwill recognized 144 Goodwill recognized as of June 30, 2017 $ 93,033

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Summary of Earnings Per Common Share	Earnings per common share are calculated as follows: (unaudited, in thousands, except shares and per share amounts) For the Three Months Ended For the Six Months Ended 2017 2016 2017 2016 Numerator for both basic and diluted earnings per common share: Net income $ 26,341 $ 22,109 $ 52,228 $ 44,982 Denominator: Total average basic common shares outstanding 43,995,749 38,373,610 43,971,789 38,380,296 Effect of dilutive stock options and other stock compensation 65,672 36,783 75,023 34,626 Total diluted average common shares outstanding 44,061,421 38,410,393 44,046,812 38,414,922 Earnings per common share – basic $ 0.60 $ 0.58 $ 1.19 $ 1.17 Earnings per common share – diluted $ 0.60 $ 0.58 $ 1.19 $ 1.17

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2017
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: June 30, 2017 December 31, 2016 (unaudited, in thousands) Amortized Gross Gross Estimated Value Amortized Gross Gross Estimated Value Available-for-sale U.S. Government sponsored entities and agencies $ 44,307 $ 9 $ (480 ) $ 43,836 $ 54,803 $ 3 $ (763 ) $ 54,043 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 938,425 811 (12,477 ) 926,759 953,475 884 (16,070 ) 938,289 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 116,584 90 (1,152 ) 115,522 98,922 27 (2,139 ) 96,810 Obligations of states and political subdivisions 110,020 3,358 (703 ) 112,675 110,208 3,114 (1,659 ) 111,663 Corporate debt securities 35,263 177 (101 ) 35,339 35,292 117 (108 ) 35,301 Total debt securities $ 1,244,599 $ 4,445 $ (14,913 ) $ 1,234,131 $ 1,252,700 $ 4,145 $ (20,739 ) $ 1,236,106 Equity securities 4,238 1,056 (5 ) 5,289 4,062 1,032 (24 ) 5,070 Total available-for-sale securities $ 1,248,837 $ 5,501 $ (14,918 ) $ 1,239,420 $ 1,256,762 $ 5,177 $ (20,763 ) $ 1,241,176 Held-to-maturity U.S. Government sponsored entities and agencies $ 12,319 $ — $ (296 ) $ 12,023 $ 13,394 $ — $ (414 ) $ 12,980 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 187,385 802 (1,638 ) 186,549 215,141 1,279 (2,563 ) 213,857 Obligations of states and political subdivisions 796,307 20,528 (1,289 ) 815,546 805,019 15,652 (5,529 ) 815,142 Corporate debt securities 34,383 889 (16 ) 35,256 34,413 418 (20 ) 34,811 Total held-to-maturity securities $ 1,030,394 $ 22,219 $ (3,239 ) $ 1,049,374 $ 1,067,967 $ 17,349 $ (8,526 ) $ 1,076,790 Total $ 2,279,231 $ 27,720 $ (18,157 ) $ 2,288,794 $ 2,324,729 $ 22,526 $ (29,289 ) $ 2,317,966
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 June 30, 2017. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date. June 30, 2017 (unaudited, in thousands) One Year One to Five to After Mortgage-backed Total Available-for-sale U.S. Government sponsored entities and agencies $ — $ 11,972 $ 16,849 $ 6,898 $ 8,117 $ 43,836 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 926,759 926,759 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 115,522 115,522 Obligations of states and political subdivisions 9,038 20,278 37,662 45,697 — 112,675 Corporate debt securities — 30,330 3,062 1,947 — 35,339 Equity securities (2) — — — — 5,289 5,289 Total available-for-sale securities $ 9,038 $ 62,580 $ 57,573 $ 54,542 $ 1,055,687 $ 1,239,420 Held-to-maturity (3) U.S. Government sponsored entities and agencies $ — $ — $ — $ — $ 12,023 $ 12,023 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 186,549 186,549 Obligations of states and political subdivisions 3,535 78,391 405,143 328,477 — 815,546 Corporate debt securities — 981 34,275 — — 35,256 Total held-to-maturity securities $ 3,535 $ 79,372 $ 439,418 $ 328,477 $ 198,572 $ 1,049,374 Total $ 12,573 $ 141,952 $ 496,991 $ 383,019 $ 1,254,259 $ 2,288,794 (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 $1.0 billion.
Schedule of Gross Realized Gains and Losses on Sales and Calls of Available-for-Sale and Held-to-Maturity Securities	The following table presents the gross realized gains and losses on sales and calls of available-for-sale and held-to-maturity securities for the three and six months ended June 30, 2017 and 2016, respectively. Gains and losses due to fair value fluctuations on trading securities are included in non-interest income under other income, with an offsetting entry in compensation expense. For the Three For the Six June 30, June 30, (unaudited, in thousands) 2017 2016 2017 2016 Gross realized gains $ 562 $ 778 $ 574 $ 1,916 Gross realized losses (68 ) (193 ) (68 ) (220 ) Net realized gains $ 494 $ 585 $ 506 $ 1,696
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 June 30, 2017 and December 31, 2016: June 30, 2017 Less than 12 months 12 months or more Total (unaudited, dollars in thousands) Fair Value Unrealized # of Fair Unrealized # of Fair Value Unrealized # of U.S. Government sponsored entities and agencies $ 36,989 $ (744 ) 8 $ 9,968 $ (32 ) 1 $ 46,957 $ (776 ) 9 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 898,142 (11,884 ) 224 71,302 (2,231 ) 19 969,444 (14,115 ) 243 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 97,844 (1,135 ) 14 667 (17 ) 2 98,511 (1,152 ) 16 Obligations of states and political subdivisions 169,042 (1,954 ) 309 2,315 (38 ) 3 171,357 (1,992 ) 312 Corporate debt securities — — — 11,939 (117 ) 4 11,939 (117 ) 4 Equity securities 1,357 (5 ) 1 — — — 1,357 (5 ) 1 Total temporarily impaired securities $ 1,203,374 $ (15,722 ) 556 $ 96,191 $ (2,435 ) 29 $ 1,299,565 $ (18,157 ) 585 December 31, 2016 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 U.S. Government sponsored entities and agencies $ 58,108 $ (1,177 ) 11 $ — $ — — $ 58,108 $ (1,177 ) 11 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 969,174 (16,436 ) 232 58,839 (2,197 ) 14 1,028,013 (18,633 ) 246 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 88,169 (2,122 ) 14 679 (17 ) 2 88,848 (2,139 ) 16 Obligations of states and political subdivisions 364,583 (7,121 ) 604 2,047 (67 ) 3 366,630 (7,188 ) 607 Corporate debt securities 10,011 (78 ) 3 5,973 (50 ) 2 15,984 (128 ) 5 Equity securities 2,938 (24 ) 2 — — — 2,938 (24 ) 2 Total temporarily impaired securities $ 1,492,983 $ (26,958 ) 866 $ 67,538 $ (2,331 ) 21 $ 1,560,521 $ (29,289 ) 887

Loans and the Allowance for C22

Loans and the Allowance for Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2017
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, and discounts on purchased loans. The deferred loan (costs) and fees were $(0.1) million and $0.3 million at June 30, 2017 and December 31, 2016, respectively. The unamortized discount on purchased loans from acquisitions was $25.0 million, including $12.7 million related to YCB, and $24.1 million at June 30, 2017 and December 31, 2016, respectively. (unaudited, in thousands) June 30, December 31, Commercial real estate: Land and construction $ 615,881 $ 496,539 Improved property 2,397,846 2,376,972 Total commercial real estate 3,013,727 2,873,511 Commercial and industrial 1,136,195 1,088,118 Residential real estate 1,363,579 1,383,390 Home equity 516,612 508,359 Consumer 360,304 396,058 Total portfolio loans 6,390,417 6,249,436 Loans held for sale 21,677 17,315 Total loans $ 6,412,094 $ 6,266,751
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 Six Months Ended June 30, 2017 and 2016 (unaudited, in thousands) Commercial Commercial Commercial Residential Home Consumer Deposit Total Balance at December 31, 2016: Allowance for loan losses $ 4,348 $ 18,628 $ 8,412 $ 4,106 $ 3,422 $ 3,998 $ 760 $ 43,674 Allowance for loan commitments 151 17 188 9 162 44 — 571 Total beginning allowance for credit losses 4,499 18,645 8,600 4,115 3,584 4,042 760 44,245 Provision for credit losses: Provision for loan losses 1,039 558 1,552 39 466 970 444 5,068 Provision for loan commitments 14 1 (9 ) 1 17 2 — 26 Total provision for credit losses 1,053 559 1,543 40 483 972 444 5,094 Charge-offs — (1,574 ) (1,205 ) (592 ) (293 ) (1,965 ) (611 ) (6,240 ) Recoveries 70 376 475 164 151 990 181 2,407 Net charge-offs 70 (1,198 ) (730 ) (428 ) (142 ) (975 ) (430 ) (3,833 ) Balance at June 30, 2017: Allowance for loan losses 5,457 17,988 9,234 3,717 3,746 3,993 774 44,909 Allowance for loan commitments 165 18 179 10 179 46 — 597 Total ending allowance for credit losses $ 5,622 $ 18,006 $ 9,413 $ 3,727 $ 3,925 $ 4,039 $ 774 $ 45,506 Balance at December 31, 2015: Allowance for loan losses $ 4,390 $ 14,748 $ 10,002 $ 4,582 $ 2,883 $ 4,763 $ 342 $ 41,710 Allowance for loan commitments 157 26 260 7 117 46 — 613 Total beginning allowance for credit losses 4,547 14,774 10,262 4,589 3,000 4,809 342 42,323 Provision for credit losses: Provision for loan losses 1,252 (559 ) 1,999 (172 ) 164 898 581 4,163 Provision for loan commitments (10 ) (13 ) (16 ) 1 10 — — (28 ) Total provision for credit losses 1,242 (572 ) 1,983 (171 ) 174 898 581 4,135 Charge-offs — (1,328 ) (765 ) (386 ) (216 ) (2,089 ) (362 ) (5,146 ) Recoveries 3 1,168 139 306 77 790 118 2,601 Net charge-offs 3 (160 ) (626 ) (80 ) (139 ) (1,299 ) (244 ) (2,545 ) Balance at June 30, 2016: Allowance for loan losses 5,645 14,029 11,375 4,330 2,908 4,362 679 43,328 Allowance for loan commitments 147 13 244 8 127 46 — 585 Total ending allowance for credit losses $ 5,792 $ 14,042 $ 11,619 $ 4,338 $ 3,035 $ 4,408 $ 679 $ 43,913
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 Commercial Commercial and Residential Estate Home Consumer Deposit Total June 30, 2017 Allowance for credit losses: Allowance for loans individually evaluated for impairment $ — $ 897 $ — $ — $ — $ — $ — $ 897 Allowance for loans collectively evaluated for impairment 5,457 17,091 9,234 3,717 3,746 3,993 774 44,012 Allowance for loan commitments 165 18 179 10 179 46 — 597 Total allowance for credit losses $ 5,622 $ 18,006 $ 9,413 $ 3,727 $ 3,925 $ 4,039 $ 774 $ 45,506 Portfolio loans: Individually evaluated for impairment (1) $ — $ 5,156 $ — $ — $ — $ — $ — $ 5,156 Collectively evaluated for impairment 614,353 2,385,876 1,135,243 1,362,813 516,612 360,297 — 6,375,194 Acquired with deteriorated credit quality 1,528 6,814 952 766 — 7 — 10,067 Total portfolio loans $ 615,881 $ 2,397,846 $ 1,136,195 $ 1,363,579 $ 516,612 $ 360,304 $ — $ 6,390,417 December 31, 2016 Allowance for credit losses: Allowance for loans individually evaluated for impairment $ — $ 470 $ 407 $ — $ — $ — $ — $ 877 Allowance for loans collectively evaluated for impairment 4,348 18,158 8,005 4,106 3,422 3,998 760 42,797 Allowance for loan commitments 151 17 188 9 162 44 — 571 Total allowance for credit losses $ 4,499 $ 18,645 $ 8,600 $ 4,115 $ 3,584 $ 4,042 $ 760 $ 44,245 Portfolio loans: Individually evaluated for impairment (1) $ — $ 3,012 $ 1,270 $ — $ — $ — $ — $ 4,282 Collectively evaluated for impairment 494,928 2,364,067 1,086,445 1,382,447 508,359 396,049 — 6,232,295 Acquired with deteriorated credit quality 1,611 9,893 403 943 — 9 — 12,859 Total portfolio loans $ 496,539 $ 2,376,972 $ 1,088,118 $ 1,383,390 $ 508,359 $ 396,058 $ — $ 6,249,436 (1) Commercial loans greater than $1 million that are reported as non-accrual or as a troubled debt restructuring (“TDR”) 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 Commercial Commercial Total Commercial As of June 30, 2017 Pass $ 609,309 $ 2,341,928 $ 1,118,983 $ 4,070,220 Criticized - compromised 3,910 26,046 9,278 39,234 Classified - substandard 2,662 29,872 7,934 40,468 Classified - doubtful — — — — Total $ 615,881 $ 2,397,846 $ 1,136,195 $ 4,149,922 As of December 31, 2016 Pass $ 489,380 $ 2,324,755 $ 1,072,751 $ 3,886,886 Criticized - compromised 4,405 15,295 5,078 24,778 Classified - substandard 2,754 36,922 10,289 49,965 Classified - doubtful — — — — Total $ 496,539 $ 2,376,972 $ 1,088,118 $ 3,961,629
Summary of Changes in Accretable Yield for Loans Acquired with Deteriorated Credit Quality	The following table provides changes in accretable yield for loans acquired with deteriorated credit quality: For the Six Months Ended (unaudited, in thousands) June 30, June 30, Balance at beginning of period $ 1,717 $ 1,206 Acquisitions — — Reclass from non-accretable difference 738 1,064 Transfers (216 ) (328 ) Accretion (279 ) (266 ) Balance at end of period $ 1,960 $ 1,676
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 60-89 Days 90 Days Total Total Loans 90 Days (1) As of June 30, 2017 Commercial real estate: Land and construction $ 611,756 $ 3,817 $ 27 $ 281 $ 4,125 $ 615,881 $ — Improved property 2,385,823 777 1,499 9,747 12,023 2,397,846 808 Total commercial real estate 2,997,579 4,594 1,526 10,028 16,148 3,013,727 808 Commercial and industrial 1,131,611 979 847 2,758 4,584 1,136,195 30 Residential real estate 1,350,915 1,568 3,176 7,920 12,664 1,363,579 1,472 Home equity 509,747 2,478 419 3,968 6,865 516,612 1,284 Consumer 355,665 2,853 1,002 784 4,639 360,304 616 Total portfolio loans 6,345,517 12,472 6,970 25,458 44,900 6,390,417 4,210 Loans held for sale 21,677 — — — — 21,677 — Total loans $ 6,367,194 $ 12,472 $ 6,970 $ 25,458 $ 44,900 $ 6,412,094 $ 4,210 Impaired loans included above are as follows: Non-accrual loans $ 12,301 $ 352 $ 2,353 $ 21,229 $ 23,934 $ 36,235 TDRs accruing interest (1) 6,690 48 84 19 151 6,841 Total impaired $ 18,991 $ 400 $ 2,437 $ 21,248 $ 24,085 $ 43,076 As of December 31, 2016 Commercial real estate: Land and construction $ 496,245 $ — $ — $ 294 $ 294 $ 496,539 $ — Improved property 2,367,790 1,154 363 7,665 9,182 2,376,972 318 Total commercial real estate 2,864,035 1,154 363 7,959 9,476 2,873,511 318 Commercial and industrial 1,082,390 2,508 1,011 2,209 5,728 1,088,118 229 Residential real estate 1,365,956 6,701 1,043 9,690 17,434 1,383,390 1,922 Home equity 502,087 2,358 862 3,052 6,272 508,359 626 Consumer 390,354 3,674 1,149 881 5,704 396,058 644 Total portfolio loans 6,204,822 16,395 4,428 23,791 44,614 6,249,436 3,739 Loans held for sale 17,315 — — — — 17,315 — Total loans $ 6,222,137 $ 16,395 $ 4,428 $ 23,791 $ 44,614 $ 6,266,751 $ 3,739 Impaired loans included above are as follows: Non-accrual loans $ 7,570 $ 3,479 $ 923 $ 19,812 $ 24,214 $ 31,784 TDRs accruing interest (1) 7,014 342 50 240 632 7,646 Total impaired $ 14,584 $ 3,821 $ 973 $ 20,052 $ 24,846 $ 39,430 (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 June 30, 2017 December 31, 2016 (unaudited, in thousands) Unpaid (1) Recorded Related Unpaid (1) Recorded Related With no related specific allowance recorded: Commercial real estate: Land and construction $ 588 $ 413 $ — $ 1,212 $ 766 $ — Improved property 16,234 11,136 — 9,826 8,141 — Commercial and industrial 10,613 4,092 — 4,456 3,181 — Residential real estate 18,645 16,983 — 20,152 18,305 — Home equity 5,247 4,608 — 4,589 4,011 — Consumer 804 688 — 884 744 — Total impaired loans without a specific allowance 52,131 37,920 — 41,119 35,148 — With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — Improved property 5,156 5,156 897 3,012 3,012 470 Commercial and industrial — — — 4,875 1,270 407 Total impaired loans with a specific allowance 5,156 5,156 897 7,887 4,282 877 Total impaired loans $ 57,287 $ 43,076 $ 897 $ 49,006 $ 39,430 $ 877 (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 Six Months Ended June 30, 2017 June 30, 2016 June 30, 2017 June 30, 2016 (unaudited, in thousands) Average Interest Average Interest Average Interest Average Interest With no related specific allowance recorded: Commercial real estate: Land and construction $ 411 $ — $ 840 $ 8 $ 529 $ — $ 1,223 $ 14 Improved Property 11,118 23 9,846 96 10,125 369 10,084 180 Commercial and industrial 4,268 2 3,303 52 3,905 4 3,362 93 Residential real estate 17,787 66 16,830 194 17,959 135 16,783 433 Home equity 4,485 5 3,428 28 4,327 10 3,296 52 Consumer 733 1 853 17 737 3 1,000 35 Total impaired loans without a specific allowance 38,802 97 35,100 395 37,582 521 35,748 807 With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — — — Improved Property 5,999 — 3,012 — 5,003 — 3,012 — Commercial and industrial — — 4,312 26 423 — 4,498 58 Total impaired loans with a specific allowance 5,999 — 7,324 26 5,426 — 7,510 58 Total impaired loans $ 44,801 $ 97 $ 42,424 $ 421 $ 43,008 $ 521 $ 43,258 $ 865
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) (unaudited, in thousands) June 30, December 31, Commercial real estate: Land and construction $ 413 $ 766 Improved property 14,859 9,535 Total commercial real estate 15,272 10,301 Commercial and industrial 3,955 4,299 Residential real estate 12,225 12,994 Home equity 4,171 3,538 Consumer 612 652 Total $ 36,235 $ 31,784 (1) At June 30, 2017, there were three borrowers with loans greater than $1.0 million totaling $8.7 million, as compared to two borrowers totaling $4.3 million at December 31, 2016. 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 June 30, 2017 December 31, 2016 (unaudited, in thousands) Accruing Non-Accrual Total Accruing Non-Accrual Total Commercial real estate: Land and construction $ — $ 6 $ 6 $ — $ 8 $ 8 Improved property 1,433 528 1,961 1,618 688 2,306 Total commercial real estate 1,433 534 1,967 1,618 696 2,314 Commercial and industrial 137 237 374 152 151 303 Residential real estate 4,758 1,902 6,660 5,311 2,212 7,523 Home equity 437 337 774 473 297 770 Consumer 76 148 224 92 190 282 Total $ 6,841 $ 3,158 $ 9,999 $ 7,646 $ 3,546 $ 11,192
Loans Identified as TDRs	The following tables present details related to loans identified as TDRs during the three and six months ended June 30, 2017 and 2016, respectively: New TDRs (1) For the Three Months Ended June 30, 2017 June 30, 2016 (unaudited, dollars in thousands) Number of Pre- Post- Number of Pre- Post- Commercial real estate: Land and construction — $ — $ — — $ — $ — Improved Property — — — — — — Total commercial real estate — — — — — — Commercial and industrial — — — — — — Residential real estate 1 11 10 1 23 22 Home equity 1 44 44 1 43 42 Consumer 2 22 20 6 38 34 Total 4 $ 77 $ 74 8 $ 104 $ 98 (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 Six Months Ended June 30, 2017 June 30, 2016 (unaudited, dollars in thousands) Number of Pre- Post- Number of Pre- Post- Commercial real estate: Land and construction — $ — $ — — $ — $ — Improved Property — — — — — — Total commercial real estate — — — — — — Commercial and industrial 2 125 120 — — — Residential real estate 2 22 18 1 23 22 Home equity 1 45 44 1 44 42 Consumer 3 34 29 6 41 34 Total 8 $ 226 $ 211 8 $ 108 $ 98 (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 table summarizes TDRs which defaulted (defined as past due 90 days) during the six months ended June 30, 2017 and 2016, respectively, that were restructured within the last twelve months prior to June 30, 2017 and 2016, respectively: Defaulted TDRs (1) For the Six Months Ended June 30, 2017 June 30, 2016 (unaudited, dollars in thousands) Number of Recorded Number of Recorded Commercial real estate: Land and construction — $ — — $ — Improved property — — — — Total commercial real estate — — — — Commercial and industrial — — 1 40 Residential real estate — — — — Home equity — — — — Consumer — — — — Total — $ — 1 $ 40 (1) Excludes loans that were either charged-off or cured by period end. The recorded investment is as of June 30, 2017 and 2016, 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: (unaudited, in thousands) June 30, December 31, Other real estate owned $ 6,654 $ 8,206 Repossessed assets 69 140 Total other real estate owned and repossessed assets $ 6,723 $ 8,346

Pension Plan (Tables)

Pension Plan (Tables)	6 Months Ended
	Jun. 30, 2017
Retirement Benefits [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 Six Months Ended (unaudited, in thousands) 2017 2016 2017 2016 Service cost – benefits earned during year $ 643 $ 696 $ 1,279 $ 1,392 Interest cost on projected benefit obligation 1,096 1,209 2,180 2,533 Expected return on plan assets (1,907 ) (1,919 ) (3,793 ) (3,838 ) Amortization of prior service cost 6 6 12 12 Amortization of net loss 803 808 1,597 1,502 Net periodic pension cost $ 641 $ 800 $ 1,275 $ 1,601

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016: June 30, 2017 Fair Value Measurements Using: June 30, Quoted Prices in Significant Significant Investments (unaudited, in thousands) (level 1) (level 2) (level 3) Value Recurring fair value measurements Trading securities $ 7,880 $ 6,483 $ — $ — $ 1,397 Securities - available-for-sale U.S. Government sponsored entities and agencies 43,836 — 43,836 — — Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 926,759 — 926,759 — — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 115,522 — 115,522 — — Obligations of state and political subdivisions 112,675 — 112,675 — — Corporate debt securities 35,339 — 35,339 — — Equity securities 5,289 3,149 2,140 — — Total securities - available-for-sale $ 1,239,420 $ 3,149 $ 1,236,271 $ — $ — Other assets - interest rate derivatives agreements $ 5,666 $ — $ 5,666 $ — $ — Total assets recurring fair value measurements $ 1,252,966 $ 9,632 $ 1,241,937 $ — $ 1,397 Other liabilities - interest rate derivatives agreements $ 5,572 $ — $ 5,572 $ — $ — Total liabilities recurring fair value measurements $ 5,572 $ — $ 5,572 $ — $ — Nonrecurring fair value measurements Impaired loans $ 4,259 $ — $ — $ 4,259 $ — Other real estate owned and repossessed assets 6,723 — — 6,723 — Loans held for sale 21,677 — 21,677 — — Total nonrecurring fair value measurements $ 32,659 $ — $ 21,677 $ 10,982 $ — December 31, 2016 Fair Value Measurements Using: December 31, Quoted Prices in Significant Significant Investments (unaudited, in thousands) (level 1) (level 2) (level 3) Value Recurring fair value measurements Trading securities $ 7,071 $ 5,633 $ — $ — $ 1,438 Securities - available-for-sale U.S. Government sponsored entities and agencies 54,043 — 54,043 — — Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 938,289 — 938,289 — — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 96,810 — 96,810 — — Obligations of state and political subdivisions 111,663 — 111,663 — — Corporate debt securities 35,301 — 35,301 — — Equity securities 5,070 2,938 2,132 — — Total securities - available-for-sale $ 1,241,176 $ 2,938 $ 1,238,238 $ — $ — Other assets - interest rate derivatives agreements $ 5,596 $ — $ 5,596 $ — $ — Total assets recurring fair value measurements $ 1,253,843 $ 8,571 $ 1,243,834 $ — $ 1,438 Other liabilities - interest rate derivatives agreements $ 5,199 $ — $ 5,199 $ — $ — Total liabilities recurring fair value measurements $ 5,199 $ — $ 5,199 $ — $ — Nonrecurring fair value measurements Impaired loans $ 3,405 $ — $ — $ 3,405 $ — Other real estate owned and repossessed assets 8,346 — — 8,346 — Loans held for sale 17,315 — 17,315 — — Total nonrecurring fair value measurements $ 29,066 $ — $ 17,315 $ 11,751 $ —
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 Fair Value Valuation Unobservable Range (Weighted (unaudited, in thousands) Estimate Techniques Input Average) June 30, 2017 Impaired loans $ 4,259 Appraisal of collateral (1) Appraisal adjustments (2) 0% to (4.8%) / (2.0%) Liquidation expenses (2) (7.6%) to (8.0%) / (7.8%) Other real estate owned and repossessed assets 6,723 Appraisal of collateral (1), (3) December 31, 2016: Impaired loans $ 3,405 Appraisal of collateral (1) Appraisal adjustments (2) 0% to (70.0%) / (36.6%) Liquidation expenses (2) (1.5%) to (8.0%) / (4.6%) Other real estate owned and repossessed assets 8,346 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 June 30, 2017 (unaudited, in thousands) Carrying Fair Value Quoted Prices in (level 1) Significant Other (level 2) Significant (level 3) Investments Financial Assets Cash and due from banks $ 110,695 $ 110,695 $ 110,695 $ — $ — $ — Trading securities 7,880 7,880 6,483 — — 1,397 Securities available-for-sale 1,239,420 1,239,420 3,149 1,236,271 — — Securities held-to-maturity 1,030,394 1,049,374 — 1,048,782 592 — Net loans 6,345,508 6,239,814 — — 6,239,814 — Loans held for sale 21,677 21,677 — 21,677 — — Other assets - interest rate derivatives 5,666 5,666 — 5,666 — — Accrued interest receivable 28,501 28,501 28,501 — — — Financial Liabilities Deposits 7,072,473 7,083,413 5,686,701 1,396,712 — — Federal Home Loan Bank borrowings 1,021,592 1,020,403 — 1,020,403 — — Other borrowings 167,671 167,663 165,565 2,098 — — Subordinated debt and junior subordinated debt 164,228 134,420 — 134,420 — — Other liabilities - interest rate derivatives 5,572 5,572 — 5,572 — — Accrued interest payable 2,407 2,407 2,407 — — — Fair Value Measurements at December 31, 2016 (unaudited, in thousands) Carrying Fair Value Quoted Prices in (level 1) Significant Other (level 2) Significant (level 3) Investments Financial Assets Cash and due from banks $ 128,170 $ 128,170 $ 128,170 $ — $ — $ — Trading securities 7,071 7,071 5,633 — — 1,438 Securities available-for-sale 1,241,176 1,241,176 2,938 1,238,238 — — Securities held-to-maturity 1,067,967 1,076,790 — 1,076,189 601 — Net loans 6,205,762 6,073,558 — — 6,073,558 — Loans held for sale 17,315 17,315 — 17,315 — — Other assets - interest rate derivatives 5,596 5,596 — 5,596 — — Accrued interest receivable 28,299 28,299 28,299 — — — Financial Liabilities Deposits 7,040,879 7,052,501 5,545,057 1,507,444 — — Federal Home Loan Bank borrowings 968,946 974,430 — 974,430 — — Other borrowings 199,376 199,385 197,164 2,221 — — Subordinated debt and junior subordinated debt 163,598 134,859 — 134,859 — — Other liabilities - interest rate derivatives 5,199 5,199 — 5,199 — — Accrued interest payable 2,204 2,204 2,204 — — —

Comprehensive Income (Tables)

Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Components of Accumulated Other Comprehensive Income	The activity in accumulated other comprehensive income for the three and six months ended June 30, 2017 and 2016 is as follows: Accumulated Other Comprehensive Income/(Loss) (1) (unaudited, in thousands) Defined Unrealized Available-for-Sale Unrealized Gains Available-for-Sale to Held-to-Maturity Total Balance at December 31, 2016 $ (17,758 ) $ (9,890 ) $ 522 $ (27,126 ) Other comprehensive income before reclassifications — 3,932 — 3,932 Amounts reclassified from accumulated other comprehensive income 1,164 35 (123 ) 1,076 Period change 1,164 3,967 (123 ) 5,008 Balance at June 30, 2017 $ (16,594 ) $ (5,923 ) $ 399 $ (22,118 ) Balance at December 31, 2015 $ (17,539 ) $ (4,162 ) $ 747 $ (20,954 ) Other comprehensive income before reclassifications — 18,100 — 18,100 Amounts reclassified from accumulated other comprehensive income 921 (1,061 ) (103 ) (243 ) Period change 921 17,039 (103 ) 17,857 Balance at June 30, 2016 $ (16,618 ) $ 12,877 $ 644 $ (3,097 ) (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 six months ended June 30, 2017 and 2016: Details about Accumulated Other Comprehensive For the Three Months Ended June 30, For the Six Months Ended June 30, Affected Line Item in the Statement of Net Income (unaudited, in thousands) 2017 2016 2017 2016 Securities available-for-sale (1) Net securities gains/losses reclassified into earnings $ 55 $ (618 ) $ 55 $ (1,672 ) Net securities gains (Non-interest income) Related income tax benefit (20 ) 226 (20 ) 611 Provision for income taxes Net effect on accumulated other comprehensive income for the period 35 (392 ) 35 (1,061 ) Securities held-to-maturity (1) Amortization of unrealized gain transferred from available-for-sale (118 ) (84 ) (189 ) (165 ) Interest and dividends on securities (Interest and dividend income) Related income tax expense 44 31 66 62 Provision for income taxes Net effect on accumulated other comprehensive income for the period (74 ) (53 ) (123 ) (103 ) Defined benefit pension plan (2) Amortization of net loss and prior service costs 809 815 1,610 1,514 Employee benefits (Non-interest expense) Related income tax benefit (300 ) (298 ) (446 ) (593 ) Provision for income taxes Net effect on accumulated other comprehensive income for the period 509 517 1,164 921 Total reclassifications for the period $ 470 $ 72 $ 1,076 $ (243 ) (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.

Commitments and Contingent Li26

Commitments and Contingent Liabilities (Tables)	6 Months Ended
	Jun. 30, 2017
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: June 30, December 31, (unaudited, in thousands) 2017 2016 Lines of credit $ 1,483,500 $ 1,418,329 Loans approved but not closed 228,118 185,253 Overdraft limits 126,459 126,517 Letters of credit 31,260 32,907 Contingent obligations to purchase loans funded by other entities 8,945 13,036

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Financial Information by Business Segment	Condensed financial information by business segment is presented below: Trust and Community Investment (unaudited, in thousands) Banking Services Consolidated For the Three Months ended June 30, 2017: Interest and dividend income $ 82,160 $ — $ 82,160 Interest expense 10,021 — 10,021 Net interest income 72,139 — 72,139 Provision for credit losses 2,383 — 2,383 Net interest income after provision for credit losses 69,756 — 69,756 Non-interest income 16,550 5,572 22,122 Non-interest expense 52,754 3,130 55,884 Income before provision for income taxes 33,552 2,442 35,994 Provision for income taxes 8,676 977 9,653 Net income $ 24,876 $ 1,465 $ 26,341 For the Three Months ended June 30, 2016: Interest and dividend income $ 67,585 $ — $ 67,585 Interest expense 7,811 — 7,811 Net interest income 59,774 — 59,774 Provision for credit losses 1,811 — 1,811 Net interest income after provision for credit losses 57,963 — 57,963 Non-interest income 14,555 5,036 19,591 Non-interest expense 44,396 2,964 47,360 Income before provision for income taxes 28,122 2,072 30,194 Provision for income taxes 7,256 829 8,085 Net income $ 20,866 $ 1,243 $ 22,109 For the Six Months ended June 30, 2017: Interest and dividend income $ 162,084 $ — $ 162,084 Interest expense 19,226 — 19,226 Net interest income 142,858 — 142,858 Provision for credit losses 5,094 — 5,094 Net interest income after provision for credit losses 137,764 — 137,764 Non-interest income 33,290 11,716 45,006 Non-interest expense 103,746 6,522 110,268 Income before provision for income taxes 67,308 5,194 72,502 Provision for income taxes 18,196 2,078 20,274 Net income $ 49,112 $ 3,116 $ 52,228 For the Six Months ended June 30, 2016: Interest and dividend income $ 135,186 $ — $ 135,186 Interest expense 15,571 — 15,571 Net interest income 119,615 — 119,615 Provision for credit losses 4,135 — 4,135 Net interest income after provision for credit losses 115,480 — 115,480 Non-interest income 28,237 10,747 38,984 Non-interest expense 86,461 6,242 92,703 Income before provision for income taxes 57,256 4,505 61,761 Provision for income taxes 14,977 1,802 16,779 Net income $ 42,279 $ 2,703 $ 44,982

Summary of Significant Accoun28

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accounting Policies [Abstract]
Service cost component of net periodic benefit cost	$ 643	$ 696	$ 1,279	$ 1,392
Partnerships losses and impairment	$ 300		$ 800

Mergers and Acquisitions - Addi

Mergers and Acquisitions - Additional Information (Detail) - Your Community Bankshares, Inc [Member] - USD ($) $ / shares in Units, $ in Thousands	Sep. 09, 2016	Jun. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Total assets acquired, excluding goodwill	$ 1,500,000
Loans	1,012,410
Securities	173,223
Value of acquisition	$ 220,498
Common shares issued	5,423,348
Cash consideration for outstanding YCB shares	$ 43,349
Goodwill acquired	93,033
Purchase price allocation in core deposit intangible	$ 11,957
Closing stock price	$ 32.62
Merger related expense		$ 500	$ 13,300
Common Stock [Member]
Business Acquisition [Line Items]
Common shares issued	5,423,348
Cash consideration for outstanding YCB shares	$ 43,300

Mergers and Acquisitions - Calc

Mergers and Acquisitions - Calculation of Purchase Price and Resulting Goodwill Relating to YCB Acquisition (Detail) - Your Community Bankshares, Inc [Member] $ in Thousands	Sep. 09, 2016USD ($)
Purchase Price:
Fair value of WesBanco shares issued	$ 177,149
Cash consideration for outstanding YCB shares	43,349
Total purchase price	220,498
Fair value of:
Tangible assets acquired	1,398,183
Core deposit and other intangible assets acquired	11,957
Liabilities assumed	(1,330,887)
Net cash received in the acquisition	48,212
Fair value of net assets acquired	127,465
Goodwill recognized	$ 93,033

Mergers and Acquisitions - Prel

Mergers and Acquisitions - Preliminary Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Sep. 09, 2016	Jun. 30, 2017	Dec. 31, 2016
Purchase Price Allocation Adjustment [Member]
Business Acquisition [Line Items]
Loans	$ (1,156)
Accrued income and other assets	743
Liabilities
Accrued expenses and other liabilities	269
Fair value of net assets acquired	(144)
Increase in goodwill recognized	144
Goodwill recognized		$ 93,033	$ 92,889
Your Community Bankshares, Inc [Member]
Business Acquisition [Line Items]
Cash and due from banks	48,212
Securities	173,223
Loans	1,012,410
Goodwill and other intangible assets	104,990
Accrued income and other assets	212,550
Total assets acquired	1,551,385
Liabilities
Deposits	1,193,010
Borrowings	123,001
Accrued expenses and other liabilities	14,876
Total liabilities assumed	1,330,887
Net assets acquired	220,498
Fair value of net assets acquired	$ 127,465

Mergers and Acquisitions - Pr32

Mergers and Acquisitions - Preliminary Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) $ in Millions	Sep. 09, 2016USD ($)
Your Community Bankshares, Inc [Member]
Business Acquisition [Line Items]
Receivables from sale of available-for-sale securities	$ 105.8

Earnings Per Common Share - Sum

Earnings Per Common Share - Summary of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Numerator for both basic and diluted earnings per common share:
Net income	$ 26,341	$ 22,109	$ 52,228	$ 44,982
Denominator:
Total average basic common shares outstanding	43,995,749	38,373,610	43,971,789	38,380,296
Effect of dilutive stock options and other stock compensation	65,672	36,783	75,023	34,626
Total diluted average common shares outstanding	44,061,421	38,410,393	44,046,812	38,414,922
Earnings per common share - basic	$ 0.60	$ 0.58	$ 1.19	$ 1.17
Earnings per common share - diluted	$ 0.60	$ 0.58	$ 1.19	$ 1.17

Earnings Per Common Share - Add

Earnings Per Common Share - Additional Information (Detail) - shares	Sep. 09, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of net income per diluted shares		117,550	186,350		186,350
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of net income per diluted shares		24,000	0	24,000	0
Your Community Bankshares, Inc [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issued for acquisition, shares	5,423,348
Your Community Bankshares, Inc [Member] | Treasury Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issued for acquisition, shares	109,257

Securities - Schedule of Fair V

Securities - Schedule of Fair Value and Amortized Cost of Available-for-sale and Held-to-maturity Securities (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	$ 1,248,837	$ 1,256,762
Available-for-sale, Gross Unrealized Gains	5,501	5,177
Available-for-sale, Gross Unrealized Losses	(14,918)	(20,763)
Available-for-sale, Estimated Fair Value	1,239,420	1,241,176
Held-to-maturity, Amortized Cost	1,030,394	1,067,967
Held-to-maturity, Gross Unrealized Gains	22,219	17,349
Held-to-maturity, Gross Unrealized Losses	(3,239)	(8,526)
Held-to-maturity securities, Fair value	1,049,374	1,076,790
Total, Amortized Cost	2,279,231	2,324,729
Total, Gross Unrealized Gains	27,720	22,526
Total, Gross Unrealized Losses	(18,157)	(29,289)
Total, Estimated Fair Value	2,288,794	2,317,966
U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	44,307	54,803
Available-for-sale, Gross Unrealized Gains	9	3
Available-for-sale, Gross Unrealized Losses	(480)	(763)
Available-for-sale, Estimated Fair Value	43,836	54,043
Held-to-maturity, Amortized Cost	12,319	13,394
Held-to-maturity, Gross Unrealized Losses	(296)	(414)
Held-to-maturity securities, Fair value	12,023	12,980
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	938,425	953,475
Available-for-sale, Gross Unrealized Gains	811	884
Available-for-sale, Gross Unrealized Losses	(12,477)	(16,070)
Available-for-sale, Estimated Fair Value	926,759	938,289
Held-to-maturity, Amortized Cost	187,385	215,141
Held-to-maturity, Gross Unrealized Gains	802	1,279
Held-to-maturity, Gross Unrealized Losses	(1,638)	(2,563)
Held-to-maturity securities, Fair value	186,549	213,857
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	116,584	98,922
Available-for-sale, Gross Unrealized Gains	90	27
Available-for-sale, Gross Unrealized Losses	(1,152)	(2,139)
Available-for-sale, Estimated Fair Value	115,522	96,810
Obligations of State and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	110,020	110,208
Available-for-sale, Gross Unrealized Gains	3,358	3,114
Available-for-sale, Gross Unrealized Losses	(703)	(1,659)
Available-for-sale, Estimated Fair Value	112,675	111,663
Held-to-maturity, Amortized Cost	796,307	805,019
Held-to-maturity, Gross Unrealized Gains	20,528	15,652
Held-to-maturity, Gross Unrealized Losses	(1,289)	(5,529)
Held-to-maturity securities, Fair value	815,546	815,142
Corporate Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	35,263	35,292
Available-for-sale, Gross Unrealized Gains	177	117
Available-for-sale, Gross Unrealized Losses	(101)	(108)
Available-for-sale, Estimated Fair Value	35,339	35,301
Held-to-maturity, Amortized Cost	34,383	34,413
Held-to-maturity, Gross Unrealized Gains	889	418
Held-to-maturity, Gross Unrealized Losses	(16)	(20)
Held-to-maturity securities, Fair value	35,256	34,811
Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	1,244,599	1,252,700
Available-for-sale, Gross Unrealized Gains	4,445	4,145
Available-for-sale, Gross Unrealized Losses	(14,913)	(20,739)
Available-for-sale, Estimated Fair Value	1,234,131	1,236,106
Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	4,238	4,062
Available-for-sale, Gross Unrealized Gains	1,056	1,032
Available-for-sale, Gross Unrealized Losses	(5)	(24)
Available-for-sale, Estimated Fair Value	$ 5,289	$ 5,070

Securities - Additional Informa

Securities - Additional Information (Detail)	6 Months Ended		12 Months Ended
	Jun. 30, 2017USD ($)Holdings	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)Holdings
Amortized Cost and Fair Value Debt Securities [Abstract]
Trading securities, at fair value	$ 7,880,000		$ 7,071,000
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	$ 1,300,000,000		$ 1,200,000,000
Proceeds from sale of available-for-sale securities	7,760,000	$ 109,644,000
Net unrealized losses on available-for-sale securities included in AOCI	5,900,000		9,900,000
Impaired loss relating to securities	0
Federal home loan bank stock, Total	$ 49,100,000		$ 46,400,000

Securities - Schedule of Fair37

Securities - Schedule of Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	$ 9,038
Total available-for-sale securities, One to Five Years	62,580
Total available-for-sale securities, Five to Ten Years	57,573
Total available-for-sale securities, After Ten Years	54,542
Total available-for-sale securities, Mortgage-backed and Equity	1,055,687
Available-for-sale, Estimated Fair Value	1,239,420	$ 1,241,176
Total held-to-maturity securities, One Year or less	3,535
Total held-to-maturity securities, One to Five Years	79,372
Total held-to-maturity securities, Five to Ten Years	439,418
Total held-to-maturity securities, After Ten Years	328,477
Total held-to-maturity securities, Mortgage-backed and Equity	198,572
Held-to-maturity securities, Fair value	1,049,374	1,076,790
Total, One Year or less	12,573
Total, One to Five Years	141,952
Total, Five to Ten Years	496,991
Total, After Ten Years, Fair value	383,019
Total, Mortgage- backed and Equity	1,254,259
Total, Fair value	2,288,794	2,317,966
U.S. Government Sponsored Entities and Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One to Five Years	11,972
Total available-for-sale securities, Five to Ten Years	16,849
Total available-for-sale securities, After Ten Years	6,898
Total available-for-sale securities, Mortgage-backed and Equity	8,117
Available-for-sale, Estimated Fair Value	43,836	54,043
Total held-to-maturity securities, Mortgage-backed and Equity	12,023
Held-to-maturity securities, Fair value	12,023	12,980
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, Mortgage-backed and Equity	926,759
Available-for-sale, Estimated Fair Value	926,759	938,289
Total held-to-maturity securities, Mortgage-backed and Equity	186,549
Held-to-maturity securities, Fair value	186,549	213,857
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, Mortgage-backed and Equity	115,522
Available-for-sale, Estimated Fair Value	115,522	96,810
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	9,038
Total available-for-sale securities, One to Five Years	20,278
Total available-for-sale securities, Five to Ten Years	37,662
Total available-for-sale securities, After Ten Years	45,697
Available-for-sale, Estimated Fair Value	112,675	111,663
Total held-to-maturity securities, One Year or less	3,535
Total held-to-maturity securities, One to Five Years	78,391
Total held-to-maturity securities, Five to Ten Years	405,143
Total held-to-maturity securities, After Ten Years	328,477
Held-to-maturity securities, Fair value	815,546	815,142
Corporate Debt Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One to Five Years	30,330
Total available-for-sale securities, Five to Ten Years	3,062
Total available-for-sale securities, After Ten Years	1,947
Available-for-sale, Estimated Fair Value	35,339	35,301
Total held-to-maturity securities, One to Five Years	981
Total held-to-maturity securities, Five to Ten Years	34,275
Held-to-maturity securities, Fair value	35,256	34,811
Equity Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, Mortgage-backed and Equity	5,289
Available-for-sale, Estimated Fair Value	$ 5,289	$ 5,070

Securities - Schedule of Fair38

Securities - Schedule of Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Amortized Cost and Fair Value Debt Securities [Abstract]
Held-to-maturity, Amortized Cost	$ 1,030,394	$ 1,067,967

Securities - Schedule of Gross

Securities - Schedule of Gross Realized Gains and Losses on Sales and Calls of Available-for-Sale and Held-to-Maturity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Securities Gross Realized Gain Loss [Abstract]
Gross realized gains	$ 562	$ 778	$ 574	$ 1,916
Gross realized losses	(68)	(193)	(68)	(220)
Net realized gains	$ 494	$ 585	$ 506	$ 1,696

Securities - Schedule of Unreal

Securities - Schedule of Unrealized Losses on Investment Securities (Detail) $ in Thousands	Jun. 30, 2017USD ($)Security	Dec. 31, 2016USD ($)Security
U.S. Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 36,989	$ 58,108
Less than 12 months, Unrealized Losses	$ (744)	$ (1,177)
Less than 12 months, Number of Securities | Security	8	11
12 months or more, Fair Value	$ 9,968
12 months or more, Unrealized Losses	$ (32)
12 months or more, Number of Securities | Security	1
Fair Value, Total	$ 46,957	$ 58,108
Unrealized Losses, Total	$ (776)	$ (1,177)
Number of Securities Total | Security	9	11
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 898,142	$ 969,174
Less than 12 months, Unrealized Losses	$ (11,884)	$ (16,436)
Less than 12 months, Number of Securities | Security	224	232
12 months or more, Fair Value	$ 71,302	$ 58,839
12 months or more, Unrealized Losses	$ (2,231)	$ (2,197)
12 months or more, Number of Securities | Security	19	14
Fair Value, Total	$ 969,444	$ 1,028,013
Unrealized Losses, Total	$ (14,115)	$ (18,633)
Number of Securities Total | Security	243	246
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 97,844	$ 88,169
Less than 12 months, Unrealized Losses	$ (1,135)	$ (2,122)
Less than 12 months, Number of Securities | Security	14	14
12 months or more, Fair Value	$ 667	$ 679
12 months or more, Unrealized Losses	$ (17)	$ (17)
12 months or more, Number of Securities | Security	2	2
Fair Value, Total	$ 98,511	$ 88,848
Unrealized Losses, Total	$ (1,152)	$ (2,139)
Number of Securities Total | Security	16	16
Obligations of State and Political Subdivisions [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 169,042	$ 364,583
Less than 12 months, Unrealized Losses	$ (1,954)	$ (7,121)
Less than 12 months, Number of Securities | Security	309	604
12 months or more, Fair Value	$ 2,315	$ 2,047
12 months or more, Unrealized Losses	$ (38)	$ (67)
12 months or more, Number of Securities | Security	3	3
Fair Value, Total	$ 171,357	$ 366,630
Unrealized Losses, Total	$ (1,992)	$ (7,188)
Number of Securities Total | Security	312	607
Corporate Debt Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value		$ 10,011
Less than 12 months, Unrealized Losses		$ (78)
Less than 12 months, Number of Securities | Security		3
12 months or more, Fair Value	$ 11,939	$ 5,973
12 months or more, Unrealized Losses	$ (117)	$ (50)
12 months or more, Number of Securities | Security	4	2
Fair Value, Total	$ 11,939	$ 15,984
Unrealized Losses, Total	$ (117)	$ (128)
Number of Securities Total | Security	4	5
Equity Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 1,357	$ 2,938
Less than 12 months, Unrealized Losses	$ (5)	$ (24)
Less than 12 months, Number of Securities | Security	1	2
Fair Value, Total	$ 1,357	$ 2,938
Unrealized Losses, Total	$ (5)	$ (24)
Number of Securities Total | Security	1	2
Total Temporarily Impaired Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 1,203,374	$ 1,492,983
Less than 12 months, Unrealized Losses	$ (15,722)	$ (26,958)
Less than 12 months, Number of Securities | Security	556	866
12 months or more, Fair Value	$ 96,191	$ 67,538
12 months or more, Unrealized Losses	$ (2,435)	$ (2,331)
12 months or more, Number of Securities | Security	29	21
Fair Value, Total	$ 1,299,565	$ 1,560,521
Unrealized Losses, Total	$ (18,157)	$ (29,289)
Number of Securities Total | Security	585	887

Loans and the Allowance for C41

Loans and the Allowance for Credit Losses - Additional Information (Detail)	6 Months Ended	12 Months Ended
	Jun. 30, 2017USD ($)Contract	Dec. 31, 2016USD ($)Contract	Sep. 09, 2016USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Financing Receivable, Recorded Investment [Line Items]
Deferred loan (costs) and fees	$ (100,000)	$ 300,000
Unamortized discount on purchased loans from acquisitions	25,000,000	24,100,000
Aggregate amount of residential real estate, home equity and consumer loans classified as substandard	20,400,000	20,600,000
Internally assigned loan grades to residential real estate, home equity and consumer loans	3,400,000	3,400,000
Loans acquired with deteriorated credit quality	10,067,000	12,859,000
Allowance for loan losses	$ 44,909,000	$ 43,674,000		$ 43,328,000	$ 41,710,000
Number of restructured contracts greater than $1 million | Contract	0	0
Unfunded commitments to debtors for impaired loans	$ 0	$ 0
Other real estate owned	$ 6,654,000	8,206,000
Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Accruing and non accrual TDR permitted interest-only payment period	3 months
Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Accruing and non accrual TDR permitted interest-only payment period	6 months
Your Community Bankshares, Inc [Member]
Financing Receivable, Recorded Investment [Line Items]
Unamortized discount on purchased loans from acquisitions	$ 12,700,000
Loans acquired with deteriorated credit quality	5,800,000	5,700,000
Fair value of acquired loans			$ 1,012,410,000
Allowance for loan losses	100,000	0
Loans acquired accretable	1,100,000
Your Community Bankshares, Inc [Member] | Cost Recovery Method [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of acquired loans	800,000	1,400,000
ESB Financial Corporation [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans acquired with deteriorated credit quality	4,300,000	7,200,000
Allowance for loan losses	2,000,000	1,800,000
Loans acquired accretable	900,000
ESB Financial Corporation [Member] | Cost Recovery Method [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of acquired loans	3,500,000	0
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans acquired with deteriorated credit quality	766,000	943,000
Allowance for loan losses	3,717,000	4,106,000		$ 4,330,000	$ 4,582,000
Other real estate owned	1,700,000	1,600,000
Foreclosure proceedings in process on residential real estate loans	2,300,000	4,100,000
Residential Real Estate [Member] | Your Community Bankshares, Inc [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Real estate owned from acquisition	$ 2,000,000	$ 3,100,000

Loans and the Allowance for C42

Loans and the Allowance for Credit Losses - Schedule of Recorded Investment in Loans by Category (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 6,390,417	$ 6,249,436
Loans held for sale	21,677	17,315
Total loans	6,412,094	6,266,751
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	615,881	496,539
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	2,397,846	2,376,972
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	1,136,195	1,088,118
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	3,013,727	2,873,511
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	1,363,579	1,383,390
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	360,304	396,058
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 516,612	$ 508,359

Loans and the Allowance for C43

Loans and the Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			$ 43,674	$ 41,710
Allowance for loan commitments, beginning balance			571	613
Total beginning allowance for credit losses			44,245	42,323
Provision for loan losses			5,068	4,163
Provision for loan commitments			26	(28)
Total provision for credit losses	$ 2,383	$ 1,811	5,094	4,135
Charge-offs			(6,240)	(5,146)
Recoveries			2,407	2,601
Net charge-offs			(3,833)	(2,545)
Allowance for loan losses, ending balance	44,909	43,328	44,909	43,328
Allowance for loan commitments, ending balance	597	585	597	585
Total ending allowance for credit losses	45,506	43,913	45,506	43,913
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			4,348	4,390
Allowance for loan commitments, beginning balance			151	157
Total beginning allowance for credit losses			4,499	4,547
Provision for loan losses			1,039	1,252
Provision for loan commitments			14	(10)
Total provision for credit losses			1,053	1,242
Recoveries			70	3
Net charge-offs			70	3
Allowance for loan losses, ending balance	5,457	5,645	5,457	5,645
Allowance for loan commitments, ending balance	165	147	165	147
Total ending allowance for credit losses	5,622	5,792	5,622	5,792
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			18,628	14,748
Allowance for loan commitments, beginning balance			17	26
Total beginning allowance for credit losses			18,645	14,774
Provision for loan losses			558	(559)
Provision for loan commitments			1	(13)
Total provision for credit losses			559	(572)
Charge-offs			(1,574)	(1,328)
Recoveries			376	1,168
Net charge-offs			(1,198)	(160)
Allowance for loan losses, ending balance	17,988	14,029	17,988	14,029
Allowance for loan commitments, ending balance	18	13	18	13
Total ending allowance for credit losses	18,006	14,042	18,006	14,042
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			8,412	10,002
Allowance for loan commitments, beginning balance			188	260
Total beginning allowance for credit losses			8,600	10,262
Provision for loan losses			1,552	1,999
Provision for loan commitments			(9)	(16)
Total provision for credit losses			1,543	1,983
Charge-offs			(1,205)	(765)
Recoveries			475	139
Net charge-offs			(730)	(626)
Allowance for loan losses, ending balance	9,234	11,375	9,234	11,375
Allowance for loan commitments, ending balance	179	244	179	244
Total ending allowance for credit losses	9,413	11,619	9,413	11,619
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			760	342
Allowance for loan commitments, beginning balance			0
Total beginning allowance for credit losses			760	342
Provision for loan losses			444	581
Total provision for credit losses			444	581
Charge-offs			(611)	(362)
Recoveries			181	118
Net charge-offs			(430)	(244)
Allowance for loan losses, ending balance	774	679	774	679
Total ending allowance for credit losses	774	679	774	679
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			4,106	4,582
Allowance for loan commitments, beginning balance			9	7
Total beginning allowance for credit losses			4,115	4,589
Provision for loan losses			39	(172)
Provision for loan commitments			1	1
Total provision for credit losses			40	(171)
Charge-offs			(592)	(386)
Recoveries			164	306
Net charge-offs			(428)	(80)
Allowance for loan losses, ending balance	3,717	4,330	3,717	4,330
Allowance for loan commitments, ending balance	10	8	10	8
Total ending allowance for credit losses	3,727	4,338	3,727	4,338
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			3,998	4,763
Allowance for loan commitments, beginning balance			44	46
Total beginning allowance for credit losses			4,042	4,809
Provision for loan losses			970	898
Provision for loan commitments			2
Total provision for credit losses			972	898
Charge-offs			(1,965)	(2,089)
Recoveries			990	790
Net charge-offs			(975)	(1,299)
Allowance for loan losses, ending balance	3,993	4,362	3,993	4,362
Allowance for loan commitments, ending balance	46	46	46	46
Total ending allowance for credit losses	4,039	4,408	4,039	4,408
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			3,422	2,883
Allowance for loan commitments, beginning balance			162	117
Total beginning allowance for credit losses			3,584	3,000
Provision for loan losses			466	164
Provision for loan commitments			17	10
Total provision for credit losses			483	174
Charge-offs			(293)	(216)
Recoveries			151	77
Net charge-offs			(142)	(139)
Allowance for loan losses, ending balance	3,746	2,908	3,746	2,908
Allowance for loan commitments, ending balance	179	127	179	127
Total ending allowance for credit losses	$ 3,925	$ 3,035	$ 3,925	$ 3,035

Loans and the Allowance for C44

Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	$ 897	$ 877
Allowance for loans collectively evaluated for impairment	44,012	42,797
Allowance for loan commitments	597	571	$ 585	$ 613
Total allowance for credit losses	45,506	44,245	43,913	42,323
Individually evaluated for impairment	5,156	4,282
Collectively evaluated for impairment	6,375,194	6,232,295
Acquired with deteriorated credit quality	10,067	12,859
Total Loans	6,390,417	6,249,436
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	5,457	4,348
Allowance for loan commitments	165	151	147	157
Total allowance for credit losses	5,622	4,499	5,792	4,547
Collectively evaluated for impairment	614,353	494,928
Acquired with deteriorated credit quality	1,528	1,611
Total Loans	615,881	496,539
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	897	470
Allowance for loans collectively evaluated for impairment	17,091	18,158
Allowance for loan commitments	18	17	13	26
Total allowance for credit losses	18,006	18,645	14,042	14,774
Individually evaluated for impairment	5,156	3,012
Collectively evaluated for impairment	2,385,876	2,364,067
Acquired with deteriorated credit quality	6,814	9,893
Total Loans	2,397,846	2,376,972
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment		407
Allowance for loans collectively evaluated for impairment	9,234	8,005
Allowance for loan commitments	179	188	244	260
Total allowance for credit losses	9,413	8,600	11,619	10,262
Individually evaluated for impairment		1,270
Collectively evaluated for impairment	1,135,243	1,086,445
Acquired with deteriorated credit quality	952	403
Total Loans	1,136,195	1,088,118
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	774	760
Allowance for loan commitments		0
Total allowance for credit losses	774	760	679	342
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	3,717	4,106
Allowance for loan commitments	10	9	8	7
Total allowance for credit losses	3,727	4,115	4,338	4,589
Collectively evaluated for impairment	1,362,813	1,382,447
Acquired with deteriorated credit quality	766	943
Total Loans	1,363,579	1,383,390
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	3,993	3,998
Allowance for loan commitments	46	44	46	46
Total allowance for credit losses	4,039	4,042	4,408	4,809
Collectively evaluated for impairment	360,297	396,049
Acquired with deteriorated credit quality	7	9
Total Loans	360,304	396,058
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	3,746	3,422
Allowance for loan commitments	179	162	127	117
Total allowance for credit losses	3,925	3,584	$ 3,035	$ 3,000
Collectively evaluated for impairment	516,612	508,359
Total Loans	$ 516,612	$ 508,359

Loans and the Allowance for C45

Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Parenthetical) (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2017USD ($)
Receivables [Abstract]
Troubled debt restructuring threshold	$ 1

Loans and the Allowance for C46

Loans and the Allowance for Credit Losses - Summary of Commercial Loans by Risk Grade (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Summary of commercial loans by risk grade
Commercial loans	$ 6,345,508	$ 6,205,762
Commercial Portfolio Segment [Member]
Summary of commercial loans by risk grade
Commercial loans	4,149,922	3,961,629
Commercial Portfolio Segment [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	4,070,220	3,886,886
Commercial Portfolio Segment [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	39,234	24,778
Commercial Portfolio Segment [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	40,468	49,965
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member]
Summary of commercial loans by risk grade
Commercial loans	615,881	496,539
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	609,309	489,380
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	3,910	4,405
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	2,662	2,754
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member]
Summary of commercial loans by risk grade
Commercial loans	2,397,846	2,376,972
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	2,341,928	2,324,755
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	26,046	15,295
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	29,872	36,922
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Summary of commercial loans by risk grade
Commercial loans	1,136,195	1,088,118
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	1,118,983	1,072,751
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	9,278	5,078
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	$ 7,934	$ 10,289

Loans and the Allowance for C47

Loans and the Allowance for Credit Losses - Summary of Changes in Accretable Yield for Loans Acquired with Deteriorated Credit Quality (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period [Abstract]
Balance at beginning of period	$ 1,717	$ 1,206
Acquisitions	0	0
Reclass from non-accretable difference	738	1,064
Transfers	(216)	(328)
Accretion	(279)	(266)
Balance at end of period	$ 1,960	$ 1,676

Loans and the Allowance for C48

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Current	$ 6,345,517	$ 6,204,822
Total Past Due	44,900	44,614
Total Loans	6,390,417	6,249,436
90 Days or More Past Due and Accruing	4,210	3,739
Loans held for sale, current	21,677	17,315
Loans held for sale	21,677	17,315
Total loans, current	6,367,194	6,222,137
Total loans	6,412,094	6,266,751
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	509,747	502,087
Total Past Due	6,865	6,272
Total Loans	516,612	508,359
90 Days or More Past Due and Accruing	1,284	626
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	2,997,579	2,864,035
Total Past Due	16,148	9,476
Total Loans	3,013,727	2,873,511
90 Days or More Past Due and Accruing	808	318
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	1,350,915	1,365,956
Total Past Due	12,664	17,434
Total Loans	1,363,579	1,383,390
90 Days or More Past Due and Accruing	1,472	1,922
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	355,665	390,354
Total Past Due	4,639	5,704
Total Loans	360,304	396,058
90 Days or More Past Due and Accruing	616	644
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	611,756	496,245
Total Past Due	4,125	294
Total Loans	615,881	496,539
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	2,385,823	2,367,790
Total Past Due	12,023	9,182
Total Loans	2,397,846	2,376,972
90 Days or More Past Due and Accruing	808	318
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	1,131,611	1,082,390
Total Past Due	4,584	5,728
Total Loans	1,136,195	1,088,118
90 Days or More Past Due and Accruing	30	229
Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	12,301	7,570
Total Past Due	23,934	24,214
Total Loans	36,235	31,784
TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	6,690	7,014
Total Past Due	151	632
Total Loans	6,841	7,646
Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	18,991	14,584
Total Past Due	24,085	24,846
Total Loans	43,076	39,430
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	12,472	16,395
30-59 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,478	2,358
30-59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	4,594	1,154
30-59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,568	6,701
30-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,853	3,674
30-59 Days Past Due [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,817
30-59 Days Past Due [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	777	1,154
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	979	2,508
30-59 Days Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	352	3,479
30-59 Days Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	48	342
30-59 Days Past Due [Member] | Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	400	3,821
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	6,970	4,428
60-89 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	419	862
60-89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,526	363
60-89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,176	1,043
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,002	1,149
60-89 Days Past Due [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	27
60-89 Days Past Due [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,499	363
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	847	1,011
60-89 Days Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,353	923
60-89 Days Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	84	50
60-89 Days Past Due [Member] | Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,437	973
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	25,458	23,791
90 Days or More Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,968	3,052
90 Days or More Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	10,028	7,959
90 Days or More Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	7,920	9,690
90 Days or More Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	784	881
90 Days or More Past Due [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	281	294
90 Days or More Past Due [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	9,747	7,665
90 Days or More Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,758	2,209
90 Days or More Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	21,229	19,812
90 Days or More Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	19	240
90 Days or More Past Due [Member] | Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	$ 21,248	$ 20,052

Loans and the Allowance for C49

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Past due loans excluded TDRs past due and accruing	90 days

Loans and the Allowance for C50

Loans and the Allowance for Credit Losses - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	$ 52,131		$ 52,131		$ 41,119
Total impaired loans, Unpaid principal balance	57,287		57,287		49,006
Recorded Investment, With no specific allowance recorded	37,920		37,920		35,148
Total impaired loans, Recorded investment	43,076		43,076		39,430
Unpaid Principal Balance, With a specific allowance recorded	5,156		5,156		7,887
Recorded Investment, With a specific allowance recorded	5,156		5,156		4,282
Related Allowance, With a specific allowance recorded	897		897		877
Average recorded investment, with no related specific allowance	38,802	$ 35,100	37,582	$ 35,748
Interest income recognized, With no related specific allowance	97	395	521	807
Average recorded investment, With a specific allowance recorded	5,999	7,324	5,426	7,510
Interest income recognized, With a specific allowance recorded		26		58
Total impaired loans, Average recorded investment	44,801	42,424	43,008	43,258
Total impaired loans, Interest income recognized	97	421	521	865
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	18,645		18,645		20,152
Recorded Investment, With no specific allowance recorded	16,983		16,983		18,305
Average recorded investment, with no related specific allowance	17,787	16,830	17,959	16,783
Interest income recognized, With no related specific allowance	66	194	135	433
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	804		804		884
Recorded Investment, With no specific allowance recorded	688		688		744
Average recorded investment, with no related specific allowance	733	853	737	1,000
Interest income recognized, With no related specific allowance	1	17	3	35
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	5,247		5,247		4,589
Recorded Investment, With no specific allowance recorded	4,608		4,608		4,011
Average recorded investment, with no related specific allowance	4,485	3,428	4,327	3,296
Interest income recognized, With no related specific allowance	5	28	10	52
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	588		588		1,212
Recorded Investment, With no specific allowance recorded	413		413		766
Average recorded investment, with no related specific allowance	411	840	529	1,223
Interest income recognized, With no related specific allowance		8		14
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	16,234		16,234		9,826
Recorded Investment, With no specific allowance recorded	11,136		11,136		8,141
Unpaid Principal Balance, With a specific allowance recorded	5,156		5,156		3,012
Recorded Investment, With a specific allowance recorded	5,156		5,156		3,012
Related Allowance, With a specific allowance recorded	897		897		470
Average recorded investment, with no related specific allowance	11,118	9,846	10,125	10,084
Interest income recognized, With no related specific allowance	23	96	369	180
Average recorded investment, With a specific allowance recorded	5,999	3,012	5,003	3,012
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	10,613		10,613		4,456
Recorded Investment, With no specific allowance recorded	4,092		4,092		3,181
Unpaid Principal Balance, With a specific allowance recorded					4,875
Recorded Investment, With a specific allowance recorded					1,270
Related Allowance, With a specific allowance recorded					$ 407
Average recorded investment, with no related specific allowance	4,268	3,303	3,905	3,362
Interest income recognized, With no related specific allowance	$ 2	52	4	93
Average recorded investment, With a specific allowance recorded		4,312	$ 423	4,498
Interest income recognized, With a specific allowance recorded		$ 26		$ 58

Loans and the Allowance for C51

Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Non-accrual loans	$ 36,235	$ 31,784
TDRs	9,999	11,192
Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	6,841	7,646
Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	3,158	3,546
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	413	766
TDRs	6	8
Commercial Real Estate - Land and Construction [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	6	8
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	14,859	9,535
TDRs	1,961	2,306
Commercial Real Estate - Improved Property [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	1,433	1,618
Commercial Real Estate - Improved Property [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	528	688
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	3,955	4,299
TDRs	374	303
Commercial and Industrial [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	137	152
Commercial and Industrial [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	237	151
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	4,171	3,538
TDRs	774	770
Home Equity [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	437	473
Home Equity [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	337	297
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	15,272	10,301
TDRs	1,967	2,314
Commercial Real Estate [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	1,433	1,618
Commercial Real Estate [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	534	696
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	12,225	12,994
TDRs	6,660	7,523
Residential Real Estate [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	4,758	5,311
Residential Real Estate [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	1,902	2,212
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	612	652
TDRs	224	282
Consumer [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	76	92
Consumer [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	$ 148	$ 190

Loans and the Allowance for C52

Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Parenthetical) (Detail)	Jun. 30, 2017USD ($)Borrowers	Dec. 31, 2016USD ($)Borrowers
Receivables [Abstract]
Number of borrowers with loans greater than one million | Borrowers	3	2
Borrowers with large amount of loans outstanding, minimum amount of loans per borrower	$ 1,000,000	$ 1,000,000
Borrowers with large amount of loans outstanding, net	$ 8,700,000	$ 4,300,000

Loans and the Allowance for C53

Loans and the Allowance for Credit Losses - Loans Identified as TDRs (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)Contract	Jun. 30, 2016USD ($)Contract	Jun. 30, 2017USD ($)Contract	Jun. 30, 2016USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	4	8	8	8
Pre-Modification Outstanding Recorded Investment	$ 77	$ 104	$ 226	$ 108
Post-Modification Outstanding Recorded Investment	$ 74	$ 98	$ 211	$ 98
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract			2
Pre-Modification Outstanding Recorded Investment			$ 125
Post-Modification Outstanding Recorded Investment			$ 120
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1	1	2	1
Pre-Modification Outstanding Recorded Investment	$ 11	$ 23	$ 22	$ 23
Post-Modification Outstanding Recorded Investment	$ 10	$ 22	$ 18	$ 22
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	2	6	3	6
Pre-Modification Outstanding Recorded Investment	$ 22	$ 38	$ 34	$ 41
Post-Modification Outstanding Recorded Investment	$ 20	$ 34	$ 29	$ 34
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1	1	1	1
Pre-Modification Outstanding Recorded Investment	$ 44	$ 43	$ 45	$ 44
Post-Modification Outstanding Recorded Investment	$ 44	$ 42	$ 44	$ 42

Loans and the Allowance for C54

Loans and the Allowance for Credit Losses - TDRs Defaulted Later Restructured (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)Defaults	Jun. 30, 2016USD ($)Defaults
Financing Receivable, Modifications [Line Items]
Number of Defaults | Defaults		1
Recorded Investment | $		$ 40
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Defaults	0	0
Recorded Investment | $	$ 0	$ 0
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Defaults		1
Recorded Investment | $		$ 40

Loans and the Allowance for C55

Loans and the Allowance for Credit Losses - Summary of Other Real Estate Owned and Repossessed Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Receivables [Abstract]
Other real estate owned	$ 6,654	$ 8,206
Repossessed assets	69	140
Total other real estate owned and repossessed assets	$ 6,723	$ 8,346

Pension Plan - Components of Ne

Pension Plan - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost - benefits earned during year	$ 643	$ 696	$ 1,279	$ 1,392
Interest cost on projected benefit obligation	1,096	1,209	2,180	2,533
Expected return on plan assets	(1,907)	(1,919)	(3,793)	(3,838)
Amortization of prior service cost	6	6	12	12
Amortization of net loss	803	808	1,597	1,502
Net periodic pension cost	$ 641	$ 800	$ 1,275	$ 1,601

Pension Plan - Additional Infor

Pension Plan - Additional Information (Detail) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Minimum required pension plan contribution	$ 2.7	$ 2.7
Available credit balance utilized for minimum required contribution	46.9	46.9
Contribution of pension fund		2.5
Pentegra Defined Benefit Plan [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Asset spin off, final costs	2.8
Distributed assets transferred	$ 8.4	$ 8.4

Fair Value Measurement - Schedu

Fair Value Measurement - Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 7,880	$ 7,071
Total securities - available-for-sale	1,239,420	1,241,176
Other assets - interest rate derivatives agreements	5,666	5,596
Total assets recurring fair value measurements	1,252,966	1,253,843
Other liabilities - interest rate derivatives agreements	5,572	5,199
Total liabilities recurring fair value measurements	5,572	5,199
Other real estate owned and repossessed assets	6,723	8,346
Loans held for sale	21,677	17,315
Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	7,880	7,071
Total securities - available-for-sale	1,239,420	1,241,176
Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,259	3,405
Other real estate owned and repossessed assets	6,723	8,346
Loans held for sale	21,677	17,315
Total nonrecurring fair value measurements	32,659	29,066
U.S. Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	43,836	54,043
U.S. Government Sponsored Entities and 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	43,836	54,043
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	926,759	938,289
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and 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	926,759	938,289
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	115,522	96,810
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and 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	115,522	96,810
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	112,675	111,663
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	112,675	111,663
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	35,339	35,301
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	35,339	35,301
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities - available-for-sale	5,289	5,070
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	5,289	5,070
Investments Measured at Net Asset Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,397	1,438
Total assets recurring fair value measurements	1,397	1,438
Investments Measured at Net Asset Value [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,397	1,438
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	6,483	5,633
Total securities - available-for-sale	3,149	2,938
Total assets recurring fair value measurements	9,632	8,571
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]
Trading securities	6,483	5,633
Total securities - available-for-sale	3,149	2,938
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	3,149	2,938
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	1,236,271	1,238,238
Other assets - interest rate derivatives agreements	5,666	5,596
Total assets recurring fair value measurements	1,241,937	1,243,834
Other liabilities - interest rate derivatives agreements	5,572	5,199
Total liabilities recurring fair value measurements	5,572	5,199
Loans held for sale	21,677	17,315
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	1,236,271	1,238,238
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	21,677	17,315
Total nonrecurring fair value measurements	21,677	17,315
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Sponsored Entities and 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	43,836	54,043
Significant Other Observable Inputs (Level 2) [Member] | Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and 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	926,759	938,289
Significant Other Observable Inputs (Level 2) [Member] | Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and 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	115,522	96,810
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	112,675	111,663
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	35,339	35,301
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	2,140	2,132
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	4,259	3,405
Other real estate owned and repossessed assets	6,723	8,346
Total nonrecurring fair value measurements	$ 10,982	$ 11,751

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair value transfer amount	$ 0	$ 0	$ 0

Fair Value Measurement - Sche60

Fair Value Measurement - Schedule of Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other real estate owned and repossessed assets	$ 6,723	$ 8,346
Nonrecurring Fair Value Measurements [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	4,259	3,405
Other real estate owned and repossessed assets	6,723	8,346
Significant Unobservable Inputs (Level 3) [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	4,259	3,405
Other real estate owned and repossessed assets	$ 6,723	$ 8,346
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans, Appraisal adjustments	0.00%	0.00%
Impaired loans, Liquidation expenses	(7.60%)	(1.50%)
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans, Appraisal adjustments	(4.80%)	(70.00%)
Impaired loans, Liquidation expenses	(8.00%)	(8.00%)
Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans, Appraisal adjustments	(2.00%)	(36.60%)
Impaired loans, Liquidation expenses	(7.80%)	(4.60%)

Fair Value Measurement - Estima

Fair Value Measurement - Estimates Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Financial Assets
Cash and due from banks	$ 110,695	$ 128,170	$ 87,626	$ 86,685
Trading securities	7,880	7,071
Securities available-for-sale	1,239,420	1,241,176
Securities held-to-maturity	1,030,394	1,067,967
Net loans	6,345,508	6,205,762
Loans held for sale	21,677	17,315
Other assets - interest rate derivatives	5,666	5,596
Accrued interest receivable	28,501	28,299
Financial Liabilities
Deposits	7,072,473	7,040,879
Federal Home Loan Bank borrowings	1,021,592	968,946
Other borrowings	167,671	199,376
Subordinated debt and junior subordinated debt	164,228	163,598
Other liabilities - interest rate derivatives	5,572	5,199
Accrued interest payable	2,407	2,204
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial Assets
Cash and due from banks	110,695	128,170
Trading securities	6,483	5,633
Securities available-for-sale	3,149	2,938
Accrued interest receivable	28,501	28,299
Financial Liabilities
Deposits	5,686,701	5,545,057
Other borrowings	165,565	197,164
Accrued interest payable	2,407	2,204
Significant Other Observable Inputs (Level 2) [Member]
Financial Assets
Securities available-for-sale	1,236,271	1,238,238
Securities held-to-maturity	1,048,782	1,076,189
Loans held for sale	21,677	17,315
Other assets - interest rate derivatives	5,666	5,596
Financial Liabilities
Deposits	1,396,712	1,507,444
Federal Home Loan Bank borrowings	1,020,403	974,430
Other borrowings	2,098	2,221
Subordinated debt and junior subordinated debt	134,420	134,859
Other liabilities - interest rate derivatives	5,572	5,199
Significant Unobservable Inputs (Level 3) [Member]
Financial Assets
Securities held-to-maturity	592	601
Net loans	6,239,814	6,073,558
Carrying Amount [Member]
Financial Assets
Cash and due from banks	110,695	128,170
Trading securities	7,880	7,071
Securities available-for-sale	1,239,420	1,241,176
Securities held-to-maturity	1,030,394	1,067,967
Net loans	6,345,508	6,205,762
Loans held for sale	21,677	17,315
Other assets - interest rate derivatives	5,666	5,596
Accrued interest receivable	28,501	28,299
Financial Liabilities
Deposits	7,072,473	7,040,879
Federal Home Loan Bank borrowings	1,021,592	968,946
Other borrowings	167,671	199,376
Subordinated debt and junior subordinated debt	164,228	163,598
Other liabilities - interest rate derivatives	5,572	5,199
Accrued interest payable	2,407	2,204
Fair Value Estimate [Member]
Financial Assets
Cash and due from banks	110,695	128,170
Trading securities	7,880	7,071
Securities available-for-sale	1,239,420	1,241,176
Securities held-to-maturity	1,049,374	1,076,790
Net loans	6,239,814	6,073,558
Loans held for sale	21,677	17,315
Other assets - interest rate derivatives	5,666	5,596
Accrued interest receivable	28,501	28,299
Financial Liabilities
Deposits	7,083,413	7,052,501
Federal Home Loan Bank borrowings	1,020,403	974,430
Other borrowings	167,663	199,385
Subordinated debt and junior subordinated debt	134,420	134,859
Other liabilities - interest rate derivatives	5,572	5,199
Accrued interest payable	2,407	2,204
Investments Measured at Net Asset Value [Member]
Financial Assets
Trading securities	$ 1,397	$ 1,438

Comprehensive Income - Componen

Comprehensive Income - Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 1,341,408	$ 1,122,132
Total other comprehensive income	5,008	17,857
Ending Balance	1,377,537	1,164,420
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(17,758)	(17,539)
Amounts reclassified from accumulated other comprehensive income	1,164	921
Total other comprehensive income	1,164	921
Ending Balance	(16,594)	(16,618)
Accumulated Unrealized Gains (Losses) on Securities Available For Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(9,890)	(4,162)
Other comprehensive income before reclassifications	3,932	18,100
Amounts reclassified from accumulated other comprehensive income	35	(1,061)
Total other comprehensive income	3,967	17,039
Ending Balance	(5,923)	12,877
Accumulated Unrealized Gains on Securities Transferred from Available For Sale to Held to Maturity [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	522	747
Amounts reclassified from accumulated other comprehensive income	(123)	(103)
Total other comprehensive income	(123)	(103)
Ending Balance	399	644
Accumulated Other Comprehensive (Loss) Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(27,126)	(20,954)
Other comprehensive income before reclassifications	3,932	18,100
Amounts reclassified from accumulated other comprehensive income	1,076	(243)
Total other comprehensive income	5,008	17,857
Ending Balance	$ (22,118)	$ (3,097)

Comprehensive Income - Compon63

Comprehensive Income - Components of Accumulated Other Comprehensive Income (Parenthetical) (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Percentage of Federal and State income tax rate	37.00%	37.00%

Comprehensive Income - Schedule

Comprehensive Income - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Detail) - Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net securities gains/losses reclassified into earnings	$ 55	$ (618)	$ 55	$ (1,672)
Related income tax benefit	(20)	226	(20)	611
Net effect on accumulated other comprehensive income for the period	35	(392)	35	(1,061)
Amortization of unrealized gain transferred from available-for-sale	(118)	(84)	(189)	(165)
Related income tax expense	44	31	66	62
Net effect on accumulated other comprehensive income for the period	(74)	(53)	(123)	(103)
Defined benefit pension plan:
Amortization of net loss and prior service costs	809	815	1,610	1,514
Related income tax benefit	(300)	(298)	(446)	(593)
Net effect on accumulated other comprehensive income for the period	509	517	1,164	921
Total reclassifications for the period	$ 470	$ 72	$ 1,076	$ (243)

Commitments and Contingent Li65

Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Allowance for credit losses associated with loan commitments	$ 597	$ 571	$ 585	$ 613
Liability associated with letters of credit	$ 200	$ 200

Commitments and Contingent Li66

Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Lines of credit	$ 1,483,500	$ 1,418,329
Loans approved but not closed	228,118	185,253
Overdraft limits	126,459	126,517
Letters of credit	31,260	32,907
Contingent obligations to purchase loans funded by other entities	$ 8,945	$ 13,036

Business Segments - Additional

Business Segments - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2017USD ($)Segment	Jun. 30, 2016USD ($)
Segment Reporting Information [Line Items]
Operating segments | Segment	2
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Market value of assets managed or held in custody by trust and investment services segment	$ 3,800	$ 3,700
Total non-fiduciary assets of the trust and investment services segment	$ 1.6	$ 3.2

Business Segments - Financial I

Business Segments - Financial Information by Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Interest and dividend income	$ 82,160	$ 67,585	$ 162,084	$ 135,186
Interest expense	10,021	7,811	19,226	15,571
Net interest income	72,139	59,774	142,858	119,615
Provision for credit losses	2,383	1,811	5,094	4,135
Net interest income after provision for credit losses	69,756	57,963	137,764	115,480
Non-interest income	22,122	19,591	45,006	38,984
Non-interest expense	55,884	47,360	110,268	92,703
Income before provision for income taxes	35,994	30,194	72,502	61,761
Provision for income taxes	9,653	8,085	20,274	16,779
Net income	26,341	22,109	52,228	44,982
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest and dividend income	82,160	67,585	162,084	135,186
Interest expense	10,021	7,811	19,226	15,571
Net interest income	72,139	59,774	142,858	119,615
Provision for credit losses	2,383	1,811	5,094	4,135
Net interest income after provision for credit losses	69,756	57,963	137,764	115,480
Non-interest income	16,550	14,555	33,290	28,237
Non-interest expense	52,754	44,396	103,746	86,461
Income before provision for income taxes	33,552	28,122	67,308	57,256
Provision for income taxes	8,676	7,256	18,196	14,977
Net income	24,876	20,866	49,112	42,279
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Non-interest income	5,572	5,036	11,716	10,747
Non-interest expense	3,130	2,964	6,522	6,242
Income before provision for income taxes	2,442	2,072	5,194	4,505
Provision for income taxes	977	829	2,078	1,802
Net income	$ 1,465	$ 1,243	$ 3,116	$ 2,703