WesBanco (WSBC) 10-Q 31 Jul 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 24, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	WSBC
Title of 12(b) Security	Common Stock
Security Exchange Name	NASDAQ
Entity Registrant Name	WESBANCO INC
Entity Central Index Key	0000203596
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding		54,697,199
Entity Shell Company	false
Entity File Number	000-08467
Entity Incorporation, State or Country Code	WV
Entity Tax Identification Number	55-0571723
Entity Address, Address Line One	1 Bank Plaza
Entity Address, City or Town	Wheeling
Entity Address, State or Province	WV
Entity Address, Postal Zip Code	26003
City Area Code	304
Local Phone Number	234-9000
Document Quarterly Report	true
Document Transition Report	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks, including interest bearing amounts of $36,390 and $44,536, respectively	$ 194,355	$ 169,186
Securities:
Equity securities, at fair value	11,817	11,737
Available-for-sale debt securities, at fair value	2,129,284	2,114,129
Held-to-maturity debt securities (fair values of $921,534 and $1,020,743, respectively)	900,605	1,020,934
Total securities	3,041,706	3,146,800
Loans held for sale	18,649	8,994
Portfolio loans, net of unearned income	7,737,854	7,656,281
Allowance for loan losses	(50,859)	(48,948)
Net portfolio loans	7,686,995	7,607,333
Premises and equipment, net	179,866	166,925
Accrued interest receivable	38,450	38,853
Goodwill and other intangible assets, net	914,678	918,850
Bank-owned life insurance	227,976	225,317
Other assets	191,978	176,374
Total Assets	12,494,653	12,458,632
Deposits:
Non-interest bearing demand	2,481,065	2,441,041
Interest bearing demand	2,079,795	2,146,508
Money market	1,098,917	1,142,925
Savings deposits	1,670,035	1,645,549
Certificates of deposit	1,365,116	1,455,610
Total deposits	8,694,928	8,831,633
Federal Home Loan Bank borrowings	1,121,283	1,054,174
Other short-term borrowings	296,148	290,522
Subordinated debt and junior subordinated debt	156,534	189,842
Total borrowings	1,573,965	1,534,538
Accrued interest payable	6,559	4,627
Other liabilities	145,085	109,007
Total Liabilities	10,420,537	10,479,805
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 2019 and 2018, respectively; 54,697,251 and 54,604,294 shares issued, respectively; 54,697,199 and 54,598,134 shares outstanding, respectively	113,952	113,758
Capital surplus	1,168,212	1,166,701
Retained earnings	788,900	737,581
Treasury stock (52 and 6,160 shares - at cost, respectively)	(2)	(274)
Accumulated other comprehensive income (loss)	4,113	(37,871)
Deferred benefits for directors	(1,059)	(1,068)
Total Shareholders' Equity	2,074,116	1,978,827
Total Liabilities and Shareholders' Equity	$ 12,494,653	$ 12,458,632

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Interest bearing deposits, banks	$ 36,390	$ 44,536
Held-to-maturity securities, fair values	$ 921,534	$ 1,020,743
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	54,697,251	54,604,294
Common stock, shares outstanding	54,697,199	54,598,134
Treasury stock, shares	52	6,160

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 96,415	$ 78,538	$ 191,917	$ 147,671
Interest and dividends on securities:
Taxable	16,444	14,194	33,175	25,738
Tax-exempt	5,142	5,055	10,684	9,890
Total interest and dividends on securities	21,586	19,249	43,859	35,628
Other interest income	1,542	1,101	2,820	1,904
Total interest and dividend income	119,543	98,888	238,596	185,203
INTEREST EXPENSE
Interest bearing demand deposits	4,314	3,150	8,259	5,673
Money market deposits	2,009	1,093	3,908	1,972
Savings deposits	678	227	1,200	416
Certificates of deposit	4,098	2,977	8,001	5,513
Total interest expense on deposits	11,099	7,447	21,368	13,574
Federal Home Loan Bank borrowings	6,287	5,953	12,624	10,451
Other short-term borrowings	1,483	973	3,039	1,532
Subordinated debt and junior subordinated debt	2,214	2,168	4,743	4,110
Total interest expense	21,083	16,541	41,774	29,667
NET INTEREST INCOME	98,460	82,347	196,822	155,536
Provision for credit losses	2,747	1,708	5,254	3,876
Net interest income after provision for credit losses	95,713	80,639	191,568	151,660
NON-INTEREST INCOME
Electronic banking fees	7,154	5,728	13,046	10,558
Net securities brokerage revenue	1,973	1,809	3,833	3,479
Bank-owned life insurance	1,340	1,128	2,659	3,884
Mortgage banking income	1,618	1,670	2,674	2,776
Net securities gains	2,909	358	3,566	319
Net gain on other real estate owned and other assets	376	229	512	491
Other income	3,250	1,588	6,438	3,760
Total non-interest income	31,156	23,408	58,929	47,491
NON-INTEREST EXPENSE
Salaries and wages	31,646	26,872	62,585	51,878
Employee benefits	9,705	7,965	19,694	14,877
Net occupancy	5,385	4,103	10,951	8,759
Equipment	4,818	4,095	9,651	8,044
Marketing	1,254	1,405	2,497	2,521
FDIC insurance	1,155	868	2,508	1,526
Amortization of intangible assets	2,465	1,312	4,978	2,397
Restructuring and merger-related expense	81	5,412	3,188	5,657
Other operating expenses	15,443	11,511	30,333	22,455
Total non-interest expense	71,952	63,543	146,385	118,114
Income before provision for income taxes	54,917	40,504	104,112	81,037
Provision for income taxes	10,103	7,335	18,961	14,339
NET INCOME	$ 44,814	$ 33,169	$ 85,151	$ 66,698
EARNINGS PER COMMON SHARE
Basic	$ 0.82	$ 0.71	$ 1.56	$ 1.47
Diluted	$ 0.82	$ 0.71	$ 1.56	$ 1.47
AVERAGE COMMON SHARES OUTSTANDING
Basic	54,628,029	46,498,305	54,613,346	45,281,264
Diluted	54,733,521	46,639,780	54,724,209	45,417,010
DIVIDENDS DECLARED PER COMMON SHARE	$ 0.31	$ 0.29	$ 0.62	$ 0.58
COMPREHENSIVE INCOME	$ 67,025	$ 26,893	$ 127,135	$ 45,904
Total Trust Fees [Member]
NON-INTEREST INCOME
NON-INTEREST INCOME	6,339	5,752	13,454	12,255
Service Charges on Deposits [Member]
NON-INTEREST INCOME
NON-INTEREST INCOME	$ 6,197	$ 5,146	$ 12,747	$ 9,969

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 Income (Loss) [Member]	Deferred Benefits for Directors [Member]
Beginning Balance at Dec. 31, 2017	$ 1,395,321	$ 91,756	$ 684,730	$ 651,357		$ (31,495)	$ (1,027)
Beginning Balance, shares at Dec. 31, 2017		44,043,244
Net income	66,698			66,698
Other Comprehensive Income (Loss)	(20,794)					(20,794)
Comprehensive income	45,904
Common dividends declared	(26,298)			(26,298)
Adoption of accounting standard ASU 2016-01				1,063		(1,063)
Shares issued for acquisition	107,347	$ 5,206	102,141
Shares issued for acquisition, shares		2,498,761
Treasury shares acquired	(680)		34		$ (714)
Treasury shares acquired, shares		(15,159)
Stock options exercised	1,143	$ 69	915		159
Stock options exercised, shares		36,788
Restricted stock granted		$ 166	(166)
Restricted stock granted, shares		79,616
Stock compensation expense	1,838		1,838
Deferred benefits for directors- net	(469)		(454)				(15)
Ending Balance at Jun. 30, 2018	1,524,106	$ 97,197	789,038	692,820	(555)	(53,352)	(1,042)
Ending Balance, shares at Jun. 30, 2018		46,643,250
Beginning Balance at Mar. 31, 2018	1,403,026	$ 91,793	686,169	673,174		(47,076)	(1,034)
Beginning Balance, shares at Mar. 31, 2018		44,060,957
Net income	33,169			33,169
Other Comprehensive Income (Loss)	(6,276)					(6,276)
Comprehensive income	26,893
Common dividends declared	(13,523)			(13,523)
Shares issued for acquisition	107,347	$ 5,206	102,141
Shares issued for acquisition, shares		2,498,761
Treasury shares acquired	(680)		34		(714)
Treasury shares acquired, shares		(15,159)
Stock options exercised	583	$ 32	392		159
Stock options exercised, shares		19,075
Restricted stock granted		$ 166	(166)
Restricted stock granted, shares		79,616
Stock compensation expense	929		929
Deferred benefits for directors- net	(469)		(461)				(8)
Ending Balance at Jun. 30, 2018	1,524,106	$ 97,197	789,038	692,820	(555)	(53,352)	(1,042)
Ending Balance, shares at Jun. 30, 2018		46,643,250
Beginning Balance at Dec. 31, 2018	1,978,827	$ 113,758	1,166,701	737,581	(274)	(37,871)	(1,068)
Beginning Balance, shares at Dec. 31, 2018		54,598,134
Net income	85,151			85,151
Other Comprehensive Income (Loss)	41,984					41,984
Comprehensive income	127,135
Common dividends declared	(33,832)			(33,832)
Treasury shares acquired	(589)		128		(717)
Treasury shares acquired, shares		(19,385)
Stock options exercised	121	$ 8	12		101
Stock options exercised, shares		6,000
Restricted stock granted		$ 186	(1,074)		888
Restricted stock granted, shares		112,450
Stock compensation expense	2,439		2,439
Deferred benefits for directors- net	15		6				9
Ending Balance at Jun. 30, 2019	2,074,116	$ 113,952	1,168,212	788,900	(2)	4,113	(1,059)
Ending Balance, shares at Jun. 30, 2019		54,697,199
Beginning Balance at Mar. 31, 2019	2,023,139	$ 113,758	1,167,761	761,002	(229)	(18,098)	(1,055)
Beginning Balance, shares at Mar. 31, 2019		54,599,127
Net income	44,814			44,814
Other Comprehensive Income (Loss)	22,211					22,211
Comprehensive income	67,025
Common dividends declared	(16,916)			(16,916)
Treasury shares acquired	(589)		128		(717)
Treasury shares acquired, shares		(19,378)
Stock options exercised	101	$ 8	37		56
Stock options exercised, shares		5,000
Restricted stock granted		$ 186	(1,074)		888
Restricted stock granted, shares		112,450
Stock compensation expense	1,364		1,364
Deferred benefits for directors- net	(8)		(4)				(4)
Ending Balance at Jun. 30, 2019	$ 2,074,116	$ 113,952	$ 1,168,212	$ 788,900	$ (2)	$ 4,113	$ (1,059)
Ending Balance, shares at Jun. 30, 2019		54,697,199

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Stockholders Equity [Abstract]
Common dividends declared, per share	$ 0.31	$ 0.29	$ 0.62	$ 0.58

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
OPERATING ACTIVITIES
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 76,370	$ 66,575
INVESTING ACTIVITIES
Net increase in loans held for investment	(71,557)	(11,819)
Available-for-sale debt securities:
Proceeds from sales	66,095	81,521
Proceeds from maturities, prepayments and calls	174,676	114,206
Purchases of securities	(138,310)	(625,395)
Held-to-maturity debt securities:
Proceeds from maturities, prepayments and calls	57,383	37,842
Purchases of securities	(6,961)	(44,656)
Equity securities:
Proceeds from sales	3,567	827
Proceeds from bank-owned life insurance		4,772
Purchases of premises and equipment – net	(6,064)	(845)
Net cash received from acquisition		86,149
Sale of portfolio loans- net		12,996
Net cash provided by (used in) investing activities	78,829	(344,402)
FINANCING ACTIVITIES
(Decrease) increase in deposits	(135,689)	36,045
Proceeds from Federal Home Loan Bank borrowings	285,000	575,000
Repayment of Federal Home Loan Bank borrowings	(218,052)	(327,142)
Increase in other short-term borrowings	5,626	67,103
Principal repayments of finance lease obligations	(199)	(189)
Decrease in federal funds purchased		(3,000)
Repayment of junior subordinated debt	(33,506)	(8,240)
Dividends paid to common shareholders	(32,742)	(24,226)
Issuance of common stock	71	1,035
Treasury shares sold - net	(539)	(572)
Net cash (used in) provided by financing activities	(130,030)	315,814
Net increase in cash and cash equivalents	25,169	37,987
Cash and cash equivalents at beginning of the period	169,186	117,572
Cash and cash equivalents at end of the period	194,355	155,559
SUPPLEMENTAL DISCLOSURES
Interest paid on deposits and other borrowings	40,501	29,791
Income taxes paid	17,650	10,000
Transfers of loans to other real estate owned	637	229
Transfers of loans to held for sale		12,996
Non-cash transactions related to FTSB acquisition		$ 107,347
Transfer of held-to-maturity debt securities to available-for-sale debt securities	67,393
Right of use assets obtained in exchange for lease obligations	$ 19,827

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of presentation — The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2018. 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 2018 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. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on WesBanco’s net income and stockholders’ equity. 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 August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This ASU specifically aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software and hosting arrangements that include an internal-use software license. The ASU does not affect the accounting for the service element of a hosting arrangement that is a service contract. The guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. WesBanco is currently assessing the impact of ASU 2018-15 on WesBanco’s Consolidated Financial Statements. In August 2018, the FASB issued ASU 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans.” This ASU modifies ASC 715-20 to improve disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The guidance is effective for fiscal years ending after December 15, 2020. Early adoption is permitted. WesBanco is currently assessing the impact of ASU 2018-14 on WesBanco’s Consolidated Financial Statements. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU modifies the disclosure objective paragraphs of ASC 820 to eliminate (1) “at a minimum” from the phrase “an entity shall disclose at a minimum” and (2) other similar “open ended” disclosure requirements to promote the appropriate exercise of discretion of entities. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted, including adoption in an interim period. WesBanco is currently assessing the impact of ASU 2018-13 on WesBanco’s Consolidated Financial Statements. In September 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326)”, which 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 formed a cross-functional team to oversee the implementation of this ASU, and has completed an initial data gap assessment, finalized the loan segmentation procedures, and is currently evaluating the various forecasting and modeling assumptions, including qualitative factors, that will be used to estimate the initial current expected credit loss allowance. Substantial progress has been made on the identification and staging of data, development of models, refinement of economic forecasting processes, and documentation of accounting policy decisions. In conjunction with this implementation, WesBanco is reviewing business processes and evaluating potential changes to the control environment. Acquired loans or pools of loans that have experienced more-than-insignificant credit deterioration are deemed to be purchased credit deteriorated (“PCD”) loans, and are grossed-up on day 1 by the initial credit estimate through goodwill as opposed to the provision for credit losses. Acquired loans deemed not to be PCD loans will be adjusted to fair value through goodwill, with an allowance and corresponding provision for credit losses recorded in the first reporting period after acquisition through current period earnings, while the loan mark will accrete through interest income over the life of such loans. At acquisition, WesBanco will consider several factors as indicators that an acquired loan or pool of loans has experienced more-than-insignificant credit deterioration. These factors may include loans 30 days or more past due, loans with an internal risk grade of below average or lower, loans classified as non-accrual by the acquired institution, materiality of the credit and loans that have been previously modified in a troubled debt restructuring. Upon adoption of this standard, acquired loans from prior acquisitions that meet the guidelines under ASC 310-30 will be classified as PCD loans. The accretable portion of the loan mark as of adoption date will continue to accrete into interest income. However, the non-accretable portion of the loan mark will be added to the allowance upon adoption; while any reversals of such mark will flow through the allowance in future periods. The loan mark on ASC 310-20 loans (“the good book”) from acquisitions will continue to accrete through interest income over the life of such loans. WesBanco will perform parallel runs of the new methodology throughout the remainder of 2019 prior to adoption of the ASU. WesBanco currently anticipates that an increase to the allowance for credit losses may be recognized upon adoption to provide for expected credit losses over the estimated life of loan and investment receivables. The magnitude of the increase will depend on economic conditions and trends in the loan and securities portfolios at the time of adoption. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)”, which requires 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. For WesBanco, this update was effective for the fiscal year beginning January 1, 2019. In January 2018, the FASB issued ASU 2018-01, which allows entities the option to apply the provisions of the new lease guidance at the effective date without adjusting the comparative periods presented. In July 2018, the FASB issued ASU 2018-10, which provides narrow-scope improvements to the lease standard and ASU 2018-11, which allows entities to choose an additional transition method, under which an entity initially applies the new lease standard at the adoption date and recognizes a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. Under this transitional method, the entity shall recognize and measure the leases that exist at the adoption date and the prior comparative periods are not adjusted. WesBanco adopted this ASU as of January 1, 2019 using the transitional method. In addition, WesBanco utilized certain practical expedients including the following - retained the classifications of existing leases, no re-assessment to determine if existing leases have initial direct costs and utilized hindsight when determining the lease term and assessment of impairment in existing leases. WesBanco capitalized $20 million for right-of-use assets and lease liabilities, net of existing straight-line lease liabilities and unfavorable acquired lease liabilities. See additional disclosures in Note 6, “Leases”. In August 2017, the FASB issued ASU 2017-12, “Targeted Improvements to Accounting for Hedging Activities.” The new guidance makes more financial and nonfinancial hedging strategies eligible for hedge accounting. It also amended the presentation and disclosure requirements and changed how companies assess effectiveness. It was intended to more closely align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The guidance was effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. For WesBanco, this update was effective for the fiscal year beginning January 1, 2019. Upon adoption, WesBanco reclassified $67.3 million of callable held-to-maturity municipal debt securities to available-for-sale debt securities. In October 2018, the FASB issued ASU 2018-16, “Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes.” This ASU modifies ASC 815 for eligible benchmark interest rates. Due to concerns about the sustainability of the London Interbank Offered Rate (LIBOR), the Federal Reserve initiated an effort to introduce an alternative reference rate in the United States. The Overnight Index Swap (OIS) rate, which is based on SOFR is permitted as a U.S. benchmark interest rate for hedge accounting purposes. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. For WesBanco, this update was effective for the fiscal year beginning January 1, 2019. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

Mergers and Acquisitions

Mergers and Acquisitions	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Mergers and Acquisitions	NOTE 2. MERGERS AND ACQUISITIONS On August 20, 2018, WesBanco completed its acquisition of Farmers Capital Bank Corp. (“FFKT”), a bank holding company headquartered in Frankfort, KY. On the acquisition date, FFKT had approximately $1.6 billion in assets, excluding goodwill, which included approximately $1.0 billion in loans and $239.3 million in securities. The FFKT acquisition was valued at $428.9 million, based on WesBanco’s closing stock price on August 20, 2018, of $49.40, and resulted in WesBanco issuing 7,920,387 shares of its common stock and $37.6 million in cash in exchange for all of the outstanding shares of FFKT common stock. The assets and liabilities of FFKT were recorded on WesBanco’s Balance Sheet at their preliminary estimated fair values as of August 20, 2018, the acquisition date, and FFKT’s results of operations have been included in WesBanco’s Consolidated Statements of Income since that date. The fair values for certain assets and liabilities acquired from FFKT on August 20, 2018 represented preliminary estimates. For the six months ended June 30, 2019, WesBanco recorded merger-related expenses of $3.2 million associated with the FFKT acquisition. The preliminary purchase price of the FFKT acquisition and resulting goodwill is summarized as follows: (unaudited, in thousands) August 20, 2018 Purchase price: Fair value of WesBanco shares issued $ 391,267 Cash consideration for outstanding FFKT shares 37,634 Total purchase price $ 428,901 Fair value of: Tangible assets acquired $ 1,369,536 Core deposit and other intangible assets acquired 39,992 Liabilities assumed (1,431,663 ) Net cash received in the acquisition 230,139 Fair value of net assets acquired 208,004 Goodwill recognized $ 220,897 The following table presents the preliminary allocation of the purchase price of the assets acquired and the liabilities assumed at the date of acquisition, as WesBanco intends to finalize its accounting for the acquisition of FFKT within one year from the date of acquisition: (unaudited, in thousands) August 20, 2018 Assets acquired Cash and due from banks $ 230,139 Securities 239,321 Loans 1,025,800 Goodwill and other intangible assets 260,889 Accrued income and other assets 104,415 Total assets acquired $ 1,860,564 Liabilities assumed Deposits $ 1,330,328 Borrowings 71,780 Accrued expenses and other liabilities 29,555 Total liabilities assumed $ 1,431,663 Net assets acquired $ 428,901 The following table presents the changes in the allocation of the purchase price of the assets acquired and the liabilities assumed at the date of the acquisition previously reported as of March 31, 2019: (unaudited, in thousands) August 20, 2018 Goodwill recognized as of March 31, 2019 $ 219,418 Change in fair value of net assets acquired: Assets Other real estate owned (80 ) Accrued income and other assets 430 Liabilities Accrued expenses and other liabilities (1,829 ) Fair value of net assets acquired $ (1,479 ) Increase in goodwill recognized 1,479 Goodwill recognized as of June 30, 2019 $ 220,897 The fair value estimates for other assets and other liabilities have continued to fluctuate as the final valuations are completed. The Company expects to finalize purchase price accounting of FFKT within one year of date of acquisition.

Earnings Per Common Share

Earnings Per Common Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Common Share	NOTE 3. EARNINGS PER COMMON SHARE Earnings per common share are calculated as follows: For the Three Months Ended June 30, For the Six Months Ended June 30, (unaudited, in thousands, except shares and per share amounts) 2019 2018 2019 2018 Numerator for both basic and diluted earnings per common share: Net income $ 44,814 $ 33,169 $ 85,151 $ 66,698 Denominator: Total average basic common shares outstanding 54,628,029 46,498,305 54,613,346 45,281,264 Effect of dilutive stock options and other stock compensation 105,492 141,475 110,863 135,746 Total diluted average common shares outstanding 54,733,521 46,639,780 54,724,209 45,417,010 Earnings per common share - basic $ 0.82 $ 0.71 $ 1.56 $ 1.47 Earnings per common share - diluted $ 0.82 $ 0.71 $ 1.56 $ 1.47 Options to purchase 353,829 and 117,600 shares at June 30, 2019 and 2018, respectively, were not included in the computation of net income per diluted share for the three months ended June 30, 2019 and 2018, respectively, because the exercise price was greater than the average market price of the common shares and, therefore, the effect would be antidilutive. Options to purchase 117,600 shares at both June 30, 2019 and 2018 were not included in the computation of net income per diluted shares for the six months ended June 30, 2019 and 2018, 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, 2019, 40,608 contingently issuable shares were estimated to be awarded under the 2018 and 2017 total shareholder return plans as stock performance targets were met and are therefore included in the diluted calculation. As of June 30, 2019, the shares related to the 2019 total shareholder return plan were not included in the calculation because the effect would be antidilutive. Performance based restricted stock compensation totaling 30,137 shares were estimated to be awarded as of June 30, 2019 and are included in the diluted calculation. As of June 30, 2018, 42,912 contingently issuable shares were estimated to be awarded under the 2018 and 2017 total shareholder return plans as stock performance targets were met and are included in the diluted calculation. Performance based restricted stock compensation totaling 17,081 shares were estimated to be awarded as of June 30, 2018 and are included in the diluted calculation.

Securities

Securities	6 Months Ended
	Jun. 30, 2019
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 debt securities: June 30, 2019 December 31, 2018 (unaudited, in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Available-for-sale debt securities U.S. Treasury $ 29,705 $ 76 $ — $ 29,781 $ 19,882 $ 3 $ (7 ) $ 19,878 U.S. Government sponsored entities and agencies 130,578 4,147 (138 ) 134,587 142,852 556 (1,756 ) 141,652 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 1,550,885 17,598 (5,441 ) 1,563,042 1,585,864 2,912 (27,521 ) 1,561,255 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 175,355 3,417 (116 ) 178,656 171,671 264 (2,963 ) 168,972 Obligations of states and political subdivisions 177,888 5,305 (15 ) 183,178 184,057 2,039 (982 ) 185,114 Corporate debt securities 39,695 499 (154 ) 40,040 37,730 87 (559 ) 37,258 Total available-for-sale debt securities $ 2,104,106 $ 31,042 $ (5,864 ) $ 2,129,284 $ 2,142,056 $ 5,861 $ (33,788 ) $ 2,114,129 Held-to-maturity debt securities U.S. Government sponsored entities and agencies $ 10,020 $ 36 $ (104 ) $ 9,952 $ 10,823 $ 6 $ (329 ) $ 10,500 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 136,929 834 (642 ) 137,121 148,300 204 (4,170 ) 144,334 Obligations of states and political subdivisions 720,399 19,566 (216 ) 739,749 828,520 8,771 (4,012 ) 833,279 Corporate debt securities 33,257 1,455 — 34,712 33,291 12 (673 ) 32,630 Total held-to-maturity debt securities $ 900,605 $ 21,891 $ (962 ) $ 921,534 $ 1,020,934 $ 8,993 $ (9,184 ) $ 1,020,743 Total debt securities $ 3,004,711 $ 52,933 $ (6,826 ) $ 3,050,818 $ 3,162,990 $ 14,854 $ (42,972 ) $ 3,134,872 At June 30, 2019 and December 31, 2018, 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. Equity securities, of which $8.7 million 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 $11.8 million and $11.7 million at June 30, 2019 and December 31, 2018, respectively. The following table presents the fair value of available-for-sale and held-to-maturity debt securities by contractual maturity at June 30, 2019. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date. June 30, 2019 (unaudited, in thousands) One Year or less One to Five Years Five to Ten Years After Ten Years Mortgage- backed securities Total Available-for-sale debt securities U.S. Treasury $ 29,781 $ — $ — $ — $ — $ 29,781 U.S. Government sponsored entities and agencies 498 6,048 18,472 9,363 100,206 134,587 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 1,563,042 1,563,042 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 178,656 178,656 Obligations of states and political subdivisions 8,108 53,422 76,671 44,977 — 183,178 Corporate debt securities 627 32,216 7,197 — — 40,040 Total available-for-sale debt securities $ 39,014 $ 91,686 $ 102,340 $ 54,340 $ 1,841,904 $ 2,129,284 Held-to-maturity debt securities (2) U.S. Government sponsored entities and agencies $ — $ — $ — $ — $ 9,952 $ 9,952 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 137,121 137,121 Obligations of states and political subdivisions 15,652 115,724 334,357 274,016 — 739,749 Corporate debt securities — 10,913 23,799 — — 34,712 Total held-to-maturity debt securities $ 15,652 $ 126,637 $ 358,156 $ 274,016 $ 147,073 $ 921,534 Total debt securities $ 54,666 $ 218,323 $ 460,496 $ 328,356 $ 1,988,977 $ 3,050,818 (1) (2) Securities with aggregate fair values of $2.0 billion at June 30, 2019 and December 31, 2018 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 $66.1 million and $81.5 million for the six months ended June 30, 2019 and 2018, respectively. Net unrealized gains (losses) on available-for-sale securities included in accumulated other comprehensive income net of tax, as of June 30, 2019 and December 31, 2018 were $19.4 million and ($21.5) million, respectively. The following table presents the gross realized gains and losses on sales and calls of available-for-sale and held-to-maturity debt securities, as well as gains and losses on equity securities from both sales and market adjustments from the adoption of ASU 2016-01 effective January 1, 2018 for the three and six months ended June 30, 2019 and 2018, respectively. For the Three Months Ended June 30, For the Six Months Ended June 30, (unaudited, in thousands) 2019 2018 2019 2018 Debt securities: Gross realized gains $ 106 $ 5 $ 348 $ 12 Gross realized losses (18 ) — (209 ) (18 ) Net gains (losses) on debt securities $ 88 $ 5 $ 139 $ (6 ) Equity securities: Net unrealized gains recognized on securities still held $ 265 $ 347 $ 868 $ 319 Net realized gains recognized on securities sold 2,556 6 2,559 6 Net gains on equity securities $ 2,821 $ 353 $ 3,427 $ 325 Net securities gains $ 2,909 $ 358 $ 3,566 $ 319 The following tables provide information on unrealized losses on debt securities that have been in an unrealized loss position for less than twelve months and twelve months or more as of June 30, 2019 and December 31, 2018, respectively: June 30, 2019 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 $ — $ — — $ 28,542 $ (242 ) 7 $ 28,542 $ (242 ) 7 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 30,301 (95 ) 4 564,036 (5,988 ) 211 594,337 (6,083 ) 215 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 3,783 (26 ) 4 26,655 (90 ) 12 30,438 (116 ) 16 Obligations of states and political subdivisions 609 (1 ) 2 38,999 (230 ) 76 39,608 (231 ) 78 Corporate debt securities 7,920 (111 ) 3 1,947 (43 ) 1 9,867 (154 ) 4 Total temporarily impaired securities $ 42,613 $ (233 ) 13 $ 660,179 $ (6,593 ) 307 $ 702,792 $ (6,826 ) 320 December 31, 2018 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. Treasury $ 9,972 $ (7 ) 1 $ — $ — — $ 9,972 $ (7 ) 1 U.S. Government sponsored entities and agencies 18,926 (148 ) 8 76,385 (1,937 ) 14 95,311 (2,085 ) 22 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 285,534 (1,862 ) 44 922,698 (29,829 ) 291 1,208,232 (31,691 ) 335 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 9,186 (18 ) 6 111,068 (2,945 ) 14 120,254 (2,963 ) 20 Obligations of states and political subdivisions 104,469 (439 ) 207 303,681 (4,555 ) 513 408,150 (4,994 ) 720 Corporate debt securities 38,791 (898 ) 18 11,452 (334 ) 5 50,243 (1,232 ) 23 Total temporarily impaired securities $ 466,878 $ (3,372 ) 284 $ 1,425,284 $ (39,600 ) 837 $ 1,892,162 $ (42,972 ) 1,121 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 $54.7 million and $50.8 million at June 30, 2019 and December 31, 2018, 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, 2019
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. Net deferred loan costs were $4.2 million and $3.2 million at June 30, 2019 and December 31, 2018, respectively. The unamortized discount on purchased loans from acquisitions was $40.1 million at June 30, 2019, including $19.0 million related to FFKT, and $49.3 million at December 31, 2018. June 30, December 31, (unaudited, in thousands) 2019 2018 Commercial real estate: Land and construction $ 483,046 $ 528,072 Improved property 3,394,587 3,325,623 Total commercial real estate 3,877,633 3,853,695 Commercial and industrial 1,300,577 1,265,460 Residential real estate 1,633,613 1,611,607 Home equity 590,303 599,331 Consumer 335,728 326,188 Total portfolio loans 7,737,854 7,656,281 Loans held for sale 18,649 8,994 Total loans $ 7,756,503 $ 7,665,275 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, 2019 and 2018 (unaudited, in thousands) Commercial Real Estate - Land and Construction Commercial Real Estate -Improved Property Commercial & Industrial Residential Real Estate Home Equity Consumer Deposit Overdraft Total Balance at December 31, 2018 Allowance for loan losses $ 4,039 $ 20,848 $ 12,114 $ 3,822 $ 4,356 $ 2,797 $ 972 $ 48,948 Allowance for loan commitments 169 33 262 12 226 39 — 741 Total beginning allowance for credit losses 4,208 20,881 12,376 3,834 4,582 2,836 972 49,689 Provision for credit losses: Provision for loan losses (538 ) 1,459 1,309 124 423 333 1,119 4,229 Provision for loan commitments 18 (9 ) 995 1 23 (3 ) — 1,025 Total provision for credit losses (520 ) 1,450 2,304 125 446 330 1,119 5,254 Charge-offs — (285 ) (1,025 ) (679 ) (673 ) (1,344 ) (860 ) (4,866 ) Recoveries 200 345 489 188 215 896 215 2,548 Net charge-offs 200 60 (536 ) (491 ) (458 ) (448 ) (645 ) (2,318 ) Balance at June 30, 2019 Allowance for loan losses 3,701 22,367 12,887 3,455 4,321 2,682 1,446 50,859 Allowance for loan commitments 187 24 1,257 13 249 36 — 1,766 Total ending allowance for credit losses $ 3,888 $ 22,391 $ 14,144 $ 3,468 $ 4,570 $ 2,718 $ 1,446 $ 52,625 Balance at December 31, 2017 Allowance for loan losses $ 3,117 $ 21,166 $ 9,414 $ 3,206 $ 4,497 $ 3,063 $ 821 $ 45,284 Allowance for loan commitments 119 26 173 7 212 37 — 574 Total beginning allowance for credit losses 3,236 21,192 9,587 3,213 4,709 3,100 821 45,858 Provision for credit losses: Provision for loan losses 1,465 (1,774 ) 2,100 944 54 615 439 3,843 Provision for loan commitments 44 (8 ) 2 2 (7 ) — — 33 Total provision for credit losses 1,509 (1,782 ) 2,102 946 47 615 439 3,876 Charge-offs (136 ) (692 ) (616 ) (509 ) (672 ) (1,793 ) (541 ) (4,959 ) Recoveries 264 776 636 252 279 1,066 197 3,470 Net charge-offs 128 84 20 (257 ) (393 ) (727 ) (344 ) (1,489 ) Balance at June 30, 2018 Allowance for loan losses 4,710 19,476 11,534 3,893 4,158 2,951 916 47,638 Allowance for loan commitments 163 18 175 9 205 37 — 607 Total ending allowance for credit losses $ 4,873 $ 19,494 $ 11,709 $ 3,902 $ 4,363 $ 2,988 $ 916 $ 48,245 The following tables present the allowance for credit losses and recorded investments in loans by category: Allowance for Credit Losses and Recorded Investment in Loans (unaudited, in thousands) Commercial Real Estate- Land and Construction Commercial Real Estate- Improved Property Commercial and Industrial Residential Real Estate Home Equity Consumer Deposit Over- draft Total June 30, 2019 Allowance for credit losses: Allowance for loans individually evaluated for impairment $ — $ 1,479 $ 11 $ 12 $ 8 $ 1 $ — $ 1,511 Allowance for loans collectively evaluated for impairment 3,701 20,888 12,876 3,443 4,313 2,681 1,446 49,348 Allowance for loan commitments 187 24 1,257 13 249 36 — 1,766 Total allowance for credit losses $ 3,888 $ 22,391 $ 14,144 $ 3,468 $ 4,570 $ 2,718 $ 1,446 $ 52,625 Portfolio loans: Individually evaluated for impairment (1) $ — $ 5,157 $ 192 $ 4,922 $ 922 $ 74 $ — $ 11,267 Collectively evaluated for impairment 482,804 3,381,541 1,299,528 1,627,047 589,381 335,654 — 7,715,955 Acquired with deteriorated credit quality 242 7,889 857 1,644 — — — 10,632 Total portfolio loans $ 483,046 $ 3,394,587 $ 1,300,577 $ 1,633,613 $ 590,303 $ 335,728 $ — $ 7,737,854 December 31, 2018 Allowance for credit losses: Allowance for loans individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ — $ — Allowance for loans collectively evaluated for impairment 4,039 20,848 12,114 3,822 4,356 2,797 972 48,948 Allowance for loan commitments 169 33 262 12 226 39 — 741 Total allowance for credit losses $ 4,208 $ 20,881 $ 12,376 $ 3,834 $ 4,582 $ 2,836 $ 972 $ 49,689 Portfolio loans: Individually evaluated for impairment (1) $ — $ — $ — $ — $ — $ — $ — $ — Collectively evaluated for impairment 527,737 3,319,672 1,264,560 1,609,177 599,331 326,063 — 7,646,540 Acquired with deteriorated credit quality 335 5,951 900 2,430 — 125 — 9,741 Total portfolio loans $ 528,072 $ 3,325,623 $ 1,265,460 $ 1,611,607 $ 599,331 $ 326,188 $ — $ 7,656,281 (1 ) 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. The type, age, condition, location and any environmental risks associated with a property are also considered for all types of commercial real estate. Commercial and industrial (“C&I”) loans consist of revolving lines of credit to finance accounts receivable, inventory and other general business purposes; term loans to finance fixed assets other than real estate, and letters of credit to support trade, insurance or governmental requirements for a variety of businesses. Most C&I borrowers are privately-held companies with annual sales up to $100 million. Factors that are considered for C&I 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 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, and are considered non-accrual. 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: Commercial Loans by Internally Assigned Risk Grade (unaudited, in thousands) Commercial Real Estate- Land and Construction Commercial Real Estate- Improved Property Commercial & Industrial Total Commercial Loans As of June 30, 2019 Pass $ 476,109 $ 3,319,270 $ 1,268,591 $ 5,063,970 Criticized - compromised 5,794 52,657 14,785 73,236 Classified - substandard 1,143 22,660 17,201 41,004 Classified - doubtful — — — — Total $ 483,046 $ 3,394,587 $ 1,300,577 $ 5,178,210 As of December 31, 2018 Pass $ 523,707 $ 3,267,304 $ 1,245,190 $ 5,036,201 Criticized - compromised 2,297 35,566 13,847 51,710 Classified - substandard 2,068 22,753 6,423 31,244 Classified - doubtful — — — — Total $ 528,072 $ 3,325,623 $ 1,265,460 $ 5,119,155 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 was $20.0 million at June 30, 2019 and $22.9 million at December 31, 2018, of which $2.0 and $3.9 million were accruing, for each period, respectively. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard are not included in the tables above. Acquired FFKT Loans – In conjunction with the FFKT acquisition, WesBanco acquired loans with a book value of $1,064.8 million as of August 20, 2018. These loans were recorded at the fair value of $1,025.8 million, with $988.3 million categorized as ASC 310-20 loans. The fair market value adjustment on these loans of $26.0 million at the acquisition date is expected to be recognized into interest income on a level yield basis over the remaining expected life of the loans. Loans acquired with deteriorated credit quality with a book value of $5.3 million were recorded at the fair value of $4.6 million, of which $2.4 million were accounted for under the cost recovery method in accordance with ASC 310-30 as cash flows cannot be reasonably estimated, and categorized as non-accrual. The carrying amount of loans acquired with deteriorated credit quality at June 30, 2019 was $3.1 million, while the outstanding customer balance was $3.6 million. At June 30, 2019, no allowance for loan losses has been recognized related to the FFKT-acquired impaired loans. Certain acquired underperforming loans with an acquired book value of $45.2 million were sold during the fourth quarter of 2018 for $32.9 million. The acquisition date fair value of the acquired loans was adjusted to the sale price resulting in no recognized gain or loss. The following table provides changes in accretable yield for loans acquired with deteriorated credit quality: For the Six Months Ended June 30, June 30, (unaudited, in thousands) 2019 2018 Balance at beginning of period $ 6,203 $ 1,724 Acquisitions 1,300 — Reduction due to change in projected cash flows (960 ) (86 ) Reclass from non-accretable difference 839 5,877 Transfers out — — Accretion (2,240 ) (440 ) Balance at end of period $ 5,142 $ 7,075 The following tables summarize the age analysis of all categories of loans: Age Analysis of Loans (unaudited, in thousands) Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Total Past Due Total Loans 90 Days or More Past Due and Accruing (1) As of June 30, 2019 Commercial real estate: Land and construction $ 482,016 $ 965 $ 45 $ 20 $ 1,030 $ 483,046 $ — Improved property 3,382,311 2,297 1,486 8,493 12,276 3,394,587 587 Total commercial real estate 3,864,327 3,262 1,531 8,513 13,306 3,877,633 587 Commercial and industrial 1,296,878 922 142 2,635 3,699 1,300,577 97 Residential real estate 1,617,430 5,962 2,449 7,772 16,183 1,633,613 1,173 Home equity 584,058 2,073 412 3,760 6,245 590,303 533 Consumer 333,279 1,682 506 261 2,449 335,728 244 Total portfolio loans 7,695,972 13,901 5,040 22,941 41,882 7,737,854 2,634 Loans held for sale 18,649 — — — — 18,649 — Total loans $ 7,714,621 $ 13,901 $ 5,040 $ 22,941 $ 41,882 $ 7,756,503 $ 2,634 Impaired loans included above are as follows: Non-accrual loans $ 9,310 $ 1,170 $ 2,169 $ 20,249 23,588 $ 32,898 TDRs accruing interest (1) 5,273 10 146 58 214 5,487 Total impaired $ 14,583 $ 1,180 $ 2,315 $ 20,307 $ 23,802 $ 38,385 As of December 31, 2018 Commercial real estate: Land and construction $ 526,660 $ 62 $ 1,350 $ — $ 1,412 $ 528,072 $ — Improved property 3,314,765 2,266 2,250 6,342 10,858 3,325,623 175 Total commercial real estate 3,841,425 2,328 3,600 6,342 12,270 3,853,695 175 Commercial and industrial 1,261,536 323 594 3,007 3,924 1,265,460 13 Residential real estate 1,593,519 2,717 5,001 10,370 18,088 1,611,607 2,820 Home equity 591,623 2,500 1,273 3,935 7,708 599,331 705 Consumer 322,584 2,084 1,007 513 3,604 326,188 364 Total portfolio loans 7,610,687 9,952 11,475 24,167 45,594 7,656,281 4,077 Loans held for sale 8,994 — — — — 8,994 — Total loans $ 7,619,681 $ 9,952 $ 11,475 $ 24,167 $ 45,594 $ 7,665,275 $ 4,077 Impaired loans included above are as follows: Non-accrual loans $ 8,910 $ 337 $ 1,370 $ 20,083 21,790 $ 30,700 TDRs accruing interest (1) 5,586 59 92 7 158 5,744 Total impaired $ 14,496 $ 396 $ 1,462 $ 20,090 $ 21,948 $ 36,444 (1) The following tables summarize impaired loans: Impaired Loans June 30, 2019 December 31, 2018 Unpaid Unpaid Principal Recorded Related Principal Recorded Related (unaudited, in thousands) Balance (1) Investment Allowance Balance (1) Investment Allowance With no related specific allowance recorded: Commercial real estate: Land and construction $ 347 $ 295 $ — $ — $ — $ — Improved property 13,499 7,312 — 14,038 9,293 — Commercial and industrial 4,086 2,854 — 4,610 3,428 — Residential real estate 13,572 11,896 — 20,270 18,016 — Home equity 5,247 4,450 — 5,924 5,036 — Consumer 416 311 — 846 671 — Total impaired loans without a specific allowance 37,167 27,118 — 45,688 36,444 — With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — Improved property 5,211 5,157 1,479 — — — Commercial and industrial 194 192 11 — — — Residential real estate 5,358 4,922 12 — — — Home equity 990 922 8 — — — Consumer 113 74 1 — — — Total impaired loans with a specific allowance 11,866 11,267 1,511 — — — Total impaired loans $ 49,033 $ 38,385 $ 1,511 $ 45,688 $ 36,444 $ — (1) Impaired Loans For the Three Months Ended For the Six Months Ended June 30, 2019 June 30, 2018 June 30, 2019 June 30, 2018 Average Interest Average Interest Average Interest Average Interest Recorded Income Recorded Income Recorded Income Recorded Income (unaudited, in thousands) Investment Recognized Investment Recognized Investment Recognized Investment Recognized With no related specific allowance recorded: Commercial real estate: Land and construction $ 290 $ — $ 400 $ — $ 193 $ — $ 346 $ — Improved property 7,287 — 10,604 23 7,955 — 11,357 368 Commercial and industrial 2,961 — 3,036 2 3,116 — 3,008 4 Residential real estate 11,845 — 18,264 61 13,902 — 18,434 127 Home equity 4,487 — 5,068 6 4,670 — 5,098 11 Consumer 337 — 758 2 448 — 823 5 Total impaired loans without a specific allowance 27,207 — 38,130 94 30,284 — 39,066 515 With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — — — Improved property 3,645 14 1,052 — 2,430 28 1,403 — Commercial and industrial 250 4 — — 166 7 — — Residential real estate 5,000 60 — — 3,333 118 — — Home equity 859 7 — — 573 15 — — Consumer 89 1 — — 59 2 — — Total impaired loans with a specific allowance 9,843 86 1,052 — 6,561 170 1,403 — Total impaired loans $ 37,050 $ 86 $ 39,182 $ 94 $ 36,845 $ 170 $ 40,469 $ 515 The following tables present the recorded investment in non-accrual loans and TDRs: Non-accrual Loans (1) June 30, December 31, (unaudited, in thousands) 2019 2018 Commercial real estate: Land and construction $ 295 $ — Improved property 11,726 8,413 Total commercial real estate 12,021 8,413 Commercial and industrial 2,854 3,260 Residential real estate 12,813 13,831 Home equity 4,886 4,610 Consumer 324 586 Total $ 32,898 $ 30,700 (1) TDRs June 30, 2019 December 31, 2018 (unaudited, in thousands) Accruing Non-Accrual Total Accruing Non-Accrual Total Commercial real estate: Land and construction $ — $ — $ — $ — $ — $ — Improved property 743 558 1,301 880 1,529 2,409 Total commercial real estate 743 558 1,301 880 1,529 2,409 Commercial and industrial 192 — 192 168 169 337 Residential real estate 4,005 917 4,922 4,185 921 5,106 Home equity 486 436 922 426 198 624 Consumer 61 13 74 85 38 123 Total $ 5,487 $ 1,924 $ 7,411 $ 5,744 $ 2,855 $ 8,599 As of June 30, 2019 and December 31, 2018, 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 months. WesBanco had unfunded commitments to debtors whose loans were classified as impaired of $0.2 million and $0.1 million as of June 30, 2019 and December 31, 2018. The following tables present details related to loans identified as TDRs during the three and six months ended June 30, 2019 and 2018, respectively: New TDRs (1) For the Three Months Ended June 30, 2019 June 30, 2018 Pre- Post- Pre- Post- Modification Modification Modification Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded (unaudited, dollars in thousands) Modifications Investment Investment Modifications Investment Investment Commercial real estate: Land and construction — $ — $ — — $ — $ — Improved Property — — — — — — Total commercial real estate — — — — — — Commercial and industrial 1 44 40 1 9 9 Residential real estate — — — — — — Home equity 1 199 156 1 20 20 Consumer — — — 2 39 36 Total 2 $ 243 $ 196 4 $ 68 $ 65 (1) New TDRs (1) For the Six Months Ended June 30, 2019 June 30, 2018 Pre- Post- Pre- Post- Modification Modification Modification Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded (unaudited, dollars in thousands) Modifications Investment Investment Modifications Investment Investment Commercial real estate: Land and construction — $ — $ — — $ — $ — Improved Property — — — — — — Total commercial real estate — — — — — — Commercial and industrial 1 44 40 1 10 9 Residential real estate 4 194 188 5 203 185 Home equity 3 386 340 1 20 20 Consumer 1 15 13 4 45 38 Total 9 $ 639 $ 581 11 $ 278 $ 252 (1) The following table summarizes TDRs which defaulted (defined as past due 90 days) during the six months ended June 30, 2019 and 2018, respectively, that were restructured within the last twelve months prior to June 30, 2019 and 2018, respectively: Defaulted TDRs (1) For the Six Months Ended June 30, 2019 June 30, 2018 Number of Recorded Number of Recorded (unaudited, dollars in thousands) Defaults Investment Defaults Investment Commercial real estate: Land and construction — $ — — $ — Improved property — — 1 145 Total commercial real estate — — 1 145 Commercial and industrial — — — — Residential real estate 1 97 1 121 Home equity — — 1 7 Consumer 1 13 — — Total 2 $ 110 3 $ 273 (1) TDRs that default are placed on non-accrual status unless they are both well-secured and in the process of collection. The loans in the table above were not accruing interest. The following table summarizes other real estate owned and repossessed assets included in other assets: June 30, December 31, (unaudited, in thousands) 2019 2018 Other real estate owned $ 4,891 $ 7,173 Repossessed assets 82 92 Total other real estate owned and repossessed assets $ 4,973 $ 7,265 Residential real estate included in other real estate owned at June 30, 2019 and December 31, 2018 was $1.2 million and $1.3 million, respectively. At June 30, 2019 and December 31, 2018, formal foreclosure proceedings were in process on residential real estate loans totaling $5.8 million and $6.0 million, respectively.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	NOTE 6. LEASES Operating leases are recorded as a right of use (“ROU”) asset and operating lease liability, included in premises and equipment, net and other liabilities, respectively, on the consolidated balance sheet beginning January 1, 2019 when WesBanco adopted ASU 2016-02 prospectively. Operating lease ROU assets represent the right to use an underlying asset during the lease term and operating lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using a discount rate that represents our incremental borrowing rate at the lease commencement date. Operating lease expense, which is comprised of amortization of the ROU asset and the implicit interest accreted on the operating lease liability, is recognized on a straight-line basis over the lease term, and is recorded primarily in net occupancy expense in the consolidated statements of comprehensive income. Operating leases relate primarily to bank branches, office space and license agreements with remaining lease terms of generally 1 to 21 years, which include options for multiple five- and ten- year extensions, with a weighted-average lease term of 9 years. As of June 30, 2019, operating lease ROU assets and liabilities were $18.2 million and $21.2 million, respectively. The lease expense for operating leases was $0.7 million and $1.3 million for the three and six months ended June 30, 2019, respectively. The weighted average discount rate was 3.29% as of June 30, 2019. Future minimum lease payments under non-cancellable leases with initial or remaining lease terms in excess of one year at June 30, 2019 are as follows ( unaudited, in thousands Year Amount 2020 $ 755 2021 2,444 2022 1,713 2023 2,227 2024 and thereafter 17,686 Total lease payments $ 24,825 Less: Interest (3,621 ) Present value of lease liabilities $ 21,204

Derivatives and Hedging Activit

Derivatives and Hedging Activities	6 Months Ended
	Jun. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	NOTE 7. DERIVATIVES AND HEDGING ACTIVITIES Risk Management Objective of Using Derivatives WesBanco is exposed to certain risks arising from both its business operations and economic conditions. WesBanco principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. WesBanco manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities. WesBanco’s existing interest rate derivatives result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk in WesBanco’s assets or liabilities. WesBanco manages a matched book with respect to its derivative instruments in order to minimize its net risk exposure resulting from such transactions. A matched book is when the Bank’s assets and liabilities are equally distributed but also have similar maturities. Loan Swaps WesBanco executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting interest rate swaps that WesBanco executes with a third party, so that WesBanco minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements of FASB ASC 815, changes in the fair value of both the customer swaps and the offsetting third-party swaps are recognized directly in earnings. As of June 30, 2019 and December 31, 2018, WesBanco had 53 and 43, respectively, interest rate swaps with an aggregate notional amount of $320.1 million and $229.8 million related to this program. During the six months ended June 30, 2019 and 2018, WesBanco recognized net losses of $1.1 million and net gains of $0.2 million, respectively, related to the changes in fair value of these swaps. Additionally, WesBanco recognized $1.9 million and $0.5 million of income for the related swap fees for the six months ended June 30, 2019 and 2018, respectively. Mortgage Loans Held for Sale and Loan Commitments Certain residential mortgage loans are originated for sale in the secondary mortgage loan market. These loans are classified as held for sale and carried at fair value as WesBanco has elected the fair value option. Fair value is determined based on rates obtained from the secondary market for loans with similar characteristics. WesBanco sells loans to the secondary market on a mandatory or best efforts basis. The loans sold on a mandatory basis are not committed to an investor until the loan is closed with the borrower. WesBanco enters into forward TBA contracts to manage the interest rate risk between the loan commitment and the closing of the loan. The loans sold on a best efforts basis are committed to an investor simultaneous to the interest rate commitment with the borrower. Fair Values of Derivative Instruments on the Balance Sheet All derivatives are carried on the consolidated balance sheet at fair value. Derivative assets are classified in the consolidated balance sheet under other assets, and derivative liabilities are classified in the consolidated balance sheet under other liabilities. Changes in fair value are recognized in earnings. None of WesBanco’s derivatives is designated in a qualifying hedging relationship under ASC 815. The table below presents the fair value of WesBanco’s derivative financial instruments as well as their classification on the Balance Sheet as of June 30, 2019 and December 31, 2018: June 30, 2019 December 31, 2018 (unaudited, in thousands) Notional or Contractual Amount Asset Derivatives Liability Derivatives Notional or Contractual Amount Asset Derivatives Liability Derivatives Derivatives Loan Swaps: Interest rate swaps $ 320,134 $ 13,281 $ 14,774 $ 229,778 $ 4,650 $ 5,081 Other contracts: Interest rate loan commitments 44,062 58 — 16,113 125 — Forward TBA contracts 61,000 — 166 20,000 — 234 Total derivatives $ 13,339 $ 14,940 $ 4,775 $ 5,315 Effect of Derivative Instruments on the Income Statement The table below presents the change in the fair value of the Company’s derivative financial instruments reflected within the other non-interest income line item of the consolidated income statement for the three and six months ended June 30, 2019 and 2018, respectively. For the Three Months Ended June 30, For the Six Months Ended June 30, (unaudited, in thousands) Location of Gain/(Loss) 2019 2018 2019 2018 Interest rate swaps Other income $ (751 ) $ 44 $ (1,063 ) $ 211 Interest rate loan commitments Mortgage banking income (97 ) 7 (67 ) 143 Forward TBA contracts Mortgage banking income (518 ) (11 ) (852 ) 399 Total $ (1,366 ) $ 40 $ (1,982 ) $ 753 Credit-risk-related Contingent Features WesBanco has agreements with its derivative counterparties that contain a provision, which provides that if WesBanco defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then WesBanco could also be declared in default on its derivative obligations. WesBanco also has agreements with certain of its derivative counterparties that contain a provision where if WesBanco fails to maintain its status as either a well or adequately capitalized institution, then the counterparty could terminate the derivative positions and WesBanco would be required to settle its obligations under the agreements. WesBanco has minimum collateral posting thresholds with certain of its derivative counterparties and has posted collateral with a market value of $21.3 million as of June 30, 2019. If WesBanco had breached any of these provisions at June 30, 2019, it could have been required to settle its obligations under the agreements at the termination value and would have been required to pay any additional amounts due in excess of amounts previously posted as collateral with the respective counterparty.

Pension & Postretirement Medica

Pension & Postretirement Medical Benefit Plans	6 Months Ended
	Jun. 30, 2019
Compensation And Retirement Disclosure [Abstract]
Pension & Postretirement Medical Benefit Plans	NOTE 8. PENSION & POSTRETIREMENT MEDICAL BENEFIT PLANS 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 June 30, For the Six Months Ended June 30, (unaudited, in thousands) 2019 2018 2019 2018 Service cost – benefits earned during year $ 560 $ 707 $ 1,114 $ 1,406 Interest cost on projected benefit obligation 1,313 1,228 2,611 2,442 Expected return on plan assets (2,211 ) (2,390 ) (4,398 ) (4,753 ) Amortization of prior service cost 6 7 13 13 Amortization of net loss 808 758 1,607 1,508 Net periodic pension cost $ 476 $ 310 $ 947 $ 616 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 $4.8 million is due for 2019, which could be offset in whole or in part by the Plan’s $52.5 million available credit balance. WesBanco made a voluntary contribution of $3.0 million to the Plan in June 2019. WesBanco assumed FFKT’s postretirement medical benefit plan, which covers FFKT employees who meet the service requirements.

Fair Value Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurement	NOTE 9. 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: The fair value of investment securities which are measured on a recurring basis are determined primarily by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other similar securities. These securities are classified within level 1 or 2 in the fair value hierarchy. Positions that are not traded in active markets for which valuations are generated using assumptions not observable in the market or management’s best estimate are classified within level 3 of the fair value hierarchy. This includes certain specific municipal debt issues for which the credit quality and discount rate must be estimated. Loans held for sale: Loans held for sale are carried, in aggregate, at fair value as WesBanco has elected the fair value option as of October 1, 2017. The use of a valuation model using quoted prices of similar instruments are significant inputs in arriving at the fair value and therefore loans held for sale are classified within level 2 of the fair value hierarchy. Derivatives: WesBanco enters into interest rate swap agreements with qualifying commercial customers to meet their financing, interest rate and other risk management needs. These agreements provide the customer the ability to convert from variable to fixed interest rates. The credit risk associated with derivatives executed with customers is essentially the same as that involved in extending loans and is subject to normal credit policies and monitoring. Those interest rate swaps are economically hedged by offsetting interest rate swaps that WesBanco executes with derivative counterparties in order to offset its exposure on the fixed components of the customer interest rate swap agreements. The interest rate swap agreement with the loan customer and with the counterparty is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period earnings as other income and other expense. WesBanco enters into forward TBA contracts to manage the interest rate risk between the loan commitments to the customer and the closing of the loan for loans that will be sold on a mandatory basis to secondary market investors. The forward TBA contract is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period’s earnings as mortgage banking income. 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. Other real estate owned and repossessed assets: Other real estate owned and repossessed assets are carried at the lower of the investment in the assets or the fair value of the assets less estimated selling costs. The use of independent appraisals and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral, and therefore other real estate owned and repossessed assets are classified within level 3 of the fair value hierarchy. 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 valu e hierarchy as of June 30, 2019 and December 31, 2018 : June 30, 2019 Fair Value Measurements Using: June 30, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (unaudited, in thousands) 2019 (level 1) (level 2) (level 3) Recurring fair value measurements Equity securities $ 11,817 $ 11,817 $ — $ — Available-for-sale debt securities U.S. Treasury 29,781 — 29,781 — U.S. Government sponsored entities and agencies 134,587 — 134,587 — Residential mortgage-backed securities and collateralized mortgage obligations of government agencies 1,563,042 — 1,563,042 — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 178,656 — 178,656 — Obligations of state and political subdivisions 183,178 — 181,576 1,602 Corporate debt securities 40,040 — 40,040 — Total available-for-sale debt securities $ 2,129,284 $ — $ 2,127,682 $ 1,602 Loans held for sale 18,649 — 18,649 — Other assets - interest rate derivatives agreements 13,281 — 13,281 — Total assets recurring fair value measurements $ 2,173,031 $ 11,817 $ 2,159,612 $ 1,602 Other liabilities - interest rate derivatives agreements $ 14,774 $ — $ 14,774 $ — Total liabilities recurring fair value measurements $ 14,774 $ — $ 14,774 $ — Nonrecurring fair value measurements Impaired Loans $ 2,434 — — $ 2,434 Other real estate owned and repossessed assets 4,973 — — 4,973 Total nonrecurring fair value measurements $ 7,407 $ — $ — $ 7,407 December 31, 2018 Fair Value Measurements Using: December 31, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (in thousands) 2018 (level 1) (level 2) (level 3) Recurring fair value measurements Equity securities $ 11,737 $ 11,737 $ — $ — Available-for-sale debt securities U.S. Treasury 19,878 — 19,878 — U.S. Government sponsored entities and agencies 141,652 — 141,652 — Residential mortgage-backed securities and collateralized mortgage obligations of government agencies 1,561,255 — 1,561,255 — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 168,972 — 168,972 — Obligations of state and political subdivisions 185,114 — 183,611 1,503 Corporate debt securities 37,258 — 37,258 — Total available-for-sale debt securities $ 2,114,129 $ — $ 2,112,626 $ 1,503 Loans held for sale 8,994 — 8,994 — Other assets - interest rate derivatives agreements 4,650 — 4,650 — Total assets recurring fair value measurements $ 2,139,510 $ 11,737 $ 2,126,270 $ 1,503 Other liabilities - interest rate derivatives agreements $ 5,081 $ — $ 5,081 $ — Total liabilities recurring fair value measurements $ 5,081 $ — $ 5,081 $ — Nonrecurring fair value measurements Other real estate owned and repossessed assets 7,265 — — 7,265 Total nonrecurring fair value measurements $ 7,265 $ — $ — $ 7,265 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 significant transfers between level 1, 2 or 3 for the three and six months ended June 30, 2019 or for the year ended December 31, 2018. 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, 2019 Impaired loans $ 2,434 Appraisal of collateral (1) Appraisal adjustments (2) (30.5%)/((30.5%) Liquidation expenses (2) (5.1%)/((5.1%) Other real estate owned and repossessed assets $ 4,973 Appraisal of collateral (1), (3) December 31, 2018 Other real estate owned and repossessed assets $ 7,265 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 expense are presented as a percent of the appraisal. (3) Includes estimated liquidation expense 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, 2019 Carrying Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (unaudited, in thousands) Amount Estimate (level 1) (level 2) (level 3) Financial Assets Cash and due from banks $ 194,355 $ 194,355 $ 194,355 $ — $ — Equity securities 11,817 11,817 11,817 — — Available-for-sale debt securities 2,129,284 2,129,284 — 2,127,682 1,602 Held-to-maturity debt securities 900,605 921,534 — 920,989 545 Net loans 7,686,995 7,674,887 — — 7,674,887 Loans held for sale 18,649 18,649 — 18,649 — Other assets - interest rate derivatives 13,281 13,281 — 13,281 — Accrued interest receivable 38,450 38,450 38,450 — — Financial Liabilities Deposits 8,694,928 8,695,779 7,329,812 1,365,967 — Federal Home Loan Bank borrowings 1,121,283 1,127,210 — 1,127,210 — Other borrowings 296,148 296,574 293,205 3,369 — Subordinated debt and junior subordinated debt 156,534 144,410 — 144,410 — Other liabilities - interest rate derivatives 14,774 14,774 — 14,774 — Accrued interest payable 6,559 6,559 6,559 — — Fair Value Measurements at December 31, 2018 Carrying Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (in thousands) Amount Estimate (level 1) (level 2) (level 3) Financial Assets Cash and due from banks $ 169,186 $ 169,186 $ 169,186 $ — $ — Equity securities 11,737 11,737 11,737 — — Available-for-sale debt securities 2,114,129 2,114,129 — 2,112,626 1,503 Held-to-maturity debt securities 1,020,934 1,020,743 — 1,020,195 548 Net loans 7,607,333 7,422,825 — — 7,422,825 Loans held for sale 8,994 8,994 — 8,994 — Other assets - interest rate derivatives 4,650 4,650 — 4,650 — Accrued interest receivable 38,853 38,853 38,853 — — Financial Liabilities Deposits 8,831,633 8,836,390 7,376,023 1,460,367 — Federal Home Loan Bank borrowings 1,054,174 1,051,401 — 1,051,401 — Other borrowings 290,522 290,854 288,918 1,936 — Subordinated debt and junior subordinated debt 189,842 174,448 — 174,448 — Other liabilities - interest rate derivatives 5,081 5,081 — 5,081 — Accrued interest payable 4,627 4,627 4,627 — — The following methods and assumptions were used to measure the fair value of financial instruments recorded at cost on WesBanco’s consolidated balance sheets: Cash and due from banks: The carrying amount for cash and due from banks is a reasonable estimate of fair value. Held-to-maturity debt securities: Fair values for debt securities held-to-maturity are determined in the same manner as investment securities, which are described above. Net loans: Fair values for loans are estimated using a discounted cash flow methodology. The discount rates take into account interest rates currently being offered to customers for loans with similar terms, the credit risk associated with the loan and other market factors, including liquidity. WesBanco believes the discount rates are consistent with transactions occurring in the marketplace for both performing and distressed loan types. The carrying value is net of the allowance for loan losses and other associated premiums and discounts. Due to the significant judgment involved in evaluating credit quality, loans are classified within level 3 of the fair value hierarchy. Accrued interest receivable: The carrying amount of accrued interest receivable approximates its fair value . Deposits: The carrying amount is considered a reasonable estimate of fair value for demand, savings and other variable rate deposit accounts. The fair value of fixed maturity certificates of deposit is estimated by a discounted cash flow method using rates currently offered for deposits of similar remaining maturities. Federal Home Loan Bank borrowings: The fair value of FHLB borrowings is based on rates currently available to WesBanco for borrowings with similar terms and remaining maturities. Other borrowings: The carrying amount of federal funds purchased and overnight sweep accounts generally approximate fair value. Other repurchase agreements are based on quoted market prices if available. If market prices are not available, for certain fixed and adjustable rate repurchase agreements, then quoted market prices of similar instruments are used. Subordinated debt and junior subordinated debt: The fair value of subordinated debt is estimated using discounted cash flow analyses based on the current borrowing rates for similar types of borrowing arrangements. Due to the pooled nature of junior subordinated debt owed to unconsolidated subsidiary trusts, which are not actively traded, estimated fair value is based on recent similar transactions of single-issuer trust preferred securities. Accrued interest payable: The carrying amount of accrued interest payable approximates its fair value. Off-balance sheet financial instruments: Off-balance sheet financial instruments consist of commitments to extend credit, including letters of credit. Fair values for commitments to extend credit are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present credit standing of the counterparties. The estimated fair value of the commitments to extend credit and letters of credit are insignificant and therefore are not presented in the above tables.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2019
Revenue Recognition [Abstract]
Revenue Recognition	NOTE 10. REVENUE RECOGNITION WesBanco adopted ASU 2014-09 as of January 1, 2018 under the modified retrospective approach and there was no material impact on WesBanco’s Consolidated Financial statements. Interest income, net securities gains (losses) and bank-owned life insurance are not in scope of ASC 606, Revenue from Contracts with Customers Trust fees: Fees are earned over a period of time between monthly and annually, per the related fee schedule. The fees are earned ratably over the period for investment, safekeeping and other services performed by WesBanco. The fees are accrued when earned based on the daily asset value on the last day of the quarter. In most cases, the fees are directly debited from the customer account. Service charges on deposits: There are monthly service charges for both commercial and personal banking customers, which are earned over the month per the related fee schedule based on the customers’ deposits. There are also transaction-based fees, which are earned based on specific transactions or customer activity within the customers’ deposit accounts. These are earned at the time the transaction or customer activity occurs. The fees are debited from the customer account. Net securities brokerage revenue: Commission income is earned based on customer transactions and management of investments. The commission income from customers’ transactions is recognized when the transaction is complete. The commission income from the management of investments is earned continuously over a quarterly period. Payment processing fees: Payment processing fees are fees earned from the bill payment and electronic funds transfer (“EFT”) services provided under the name FirstNet. The fees are derived from both the individual consumer banking transactions and from businesses or service providers through monthly billing for total transactions occurring. These fees are earned at the time the transaction or customer activity occurs. The fees are debited from the customers’ deposit accounts or charged directly to the business or service provider. Electronic banking fees: Interchange and ATM fees are earned based on customer and ATM transactions. Revenue is recognized when the transaction is settled. Mortgage banking income: Income is earned when WesBanco-originated loans are sold to an investor on the secondary market. The investor bids on the loans. If the price is accepted, WesBanco delivers the loan documents to the investor. Once received and approved by the investor, revenue is recognized and the loans are derecognized from the Consolidated Balance Sheet. Prior to the loans being sold, they are classified as loans held for sale. Additionally, the changes in the fair value of the loans held for sale, loan commitments and related derivatives are included in mortgage banking income. Net gain or loss on sale of other real estate owned: Net gain or loss is recorded when other real estate is sold to a third party and the Bank collects substantially all of the consideration to which WesBanco is entitled in exchange for the transfer of the property. The following table summarizes the point of revenue recognition and the income recognized for each of the revenue streams for the three and six months ended June 30, 2019 and 2018, respectively: Point of Revenue For the Three Months Ended June 30, For the Six Months Ended June 30, (unaudited, in thousands) Recognition 2019 2018 2019 2018 Revenue Streams Trust fees Trust account fees Over time $ 4,208 $ 3,558 $ 9,263 $ 7,850 WesMark fees Over time 2,131 2,194 4,191 4,405 Total trust fees 6,339 5,752 13,454 12,255 Service charges on deposits Commercial banking fees Over time 499 462 967 869 Personal service charges At a point in time & over time 5,698 4,684 11,780 9,100 Total service charges on deposits 6,197 5,146 12,747 9,969 Net securities brokerage revenue Annuity commissions At a point in time 1,454 1,310 2,815 2,510 Equity and debt security trades At a point in time 103 87 206 189 Managed money Over time 174 163 331 304 Trail commissions Over time 242 249 481 476 Total net securities brokerage revenue 1,973 1,809 3,833 3,479 Payment processing fees (1) At a point in time & over time 785 — 1,433 — Electronic banking fees At a point in time 7,154 5,728 13,046 10,558 Mortgage banking income At a point in time 1,618 1,670 2,674 2,776 Net gain on other real estate owned and other assets At a point in time 376 229 512 491 (1)

Comprehensive Income_(Loss)

Comprehensive Income/(Loss)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Comprehensive Income/(Loss)	NOTE 11. COMPREHENSIVE INCOME/(LOSS) The activity in accumulated other comprehensive income for the six months ended June 30, 2019 and 2018 is as follows: Accumulated Other Comprehensive Income/(Loss) (1) (unaudited, in thousands) Defined Benefit Plans Unrealized Gains (Losses) on Debt Securities Available-for-Sale Unrealized Gains on Debt Securities Transferred from Available-for-Sale to Held-to-Maturity Total Balance at December 31, 2018 $ (16,542 ) $ (21,522 ) $ 193 $ (37,871 ) Other comprehensive income before reclassifications — 40,996 — 40,996 Amounts reclassified from accumulated other comprehensive income 1,129 (30 ) (111 ) 988 Period change 1,129 40,966 (111 ) 41,984 Balance at June 30, 2019 $ (15,413 ) $ 19,444 $ 82 $ 4,113 Balance at December 31, 2017 $ (18,626 ) $ (13,250 ) $ 381 $ (31,495 ) Other comprehensive income before reclassifications — (21,720 ) — (21,720 ) Amounts reclassified from accumulated other comprehensive income 1,026 — (100 ) 926 Period change 1,026 (21,720 ) (100 ) (20,794 ) Adoption of Accounting Standard ASU 2016-01 — (1,063 ) — (1,063 ) Balance at June 30, 2018 $ (17,600 ) $ (36,033 ) $ 281 $ (53,352 ) (1 ) The following table provides details about amounts reclassified from accumulated other comprehensive income for the three and six months ended June 30, 2019 and 2018, respectively: Details about Accumulated Other Comprehensive Income/(Loss) Components 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) 2019 2018 2019 2018 Debt securities available-for-sale (1) Net securities losses (gains) reclassified into earnings $ 4 $ — $ (38 ) $ — Net securities gains (Non-interest income) Related income tax (benefit) expense (1 ) — 8 — Provision for income taxes Net effect on accumulated other comprehensive income for the period 3 — (30 ) — Debt securities held-to-maturity (1) Amortization of unrealized gain transferred from available-for-sale (94 ) (66 ) (149 ) (131 ) Interest and dividends on securities (Interest and dividend income) Related income tax expense 21 15 38 31 Provision for income taxes Net effect on accumulated other comprehensive income for the period (73 ) (51 ) (111 ) (100 ) Defined benefit plans (2) Amortization of net loss and prior service costs 758 764 1,509 1,520 Employee benefits (Non-interest expense) Related income tax benefit (173 ) (175 ) (380 ) (494 ) Provision for income taxes Net effect on accumulated other comprehensive income for the period 585 589 1,129 1,026 Total reclassifications for the period $ 515 $ 538 $ 988 $ 926 (1) (2)

Commitments and Contingent Liab

Commitments and Contingent Liabilities	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	NOTE 12. COMMITMENTS AND CONTINGENT LIABILITIES Commitments — In the normal course of business, WesBanco offers off-balance sheet credit arrangements to enable its customers to meet their financing objectives. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. WesBanco’s exposure to credit losses in the event of non-performance by the other parties to the financial instruments for commitments to extend credit and standby letters of credit is limited to the contractual amount of those instruments. WesBanco uses the same credit policies in making commitments and conditional obligations as for all other lending. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The allowance for credit losses associated with commitments was $1.8 million and $0.7 million as of June 30, 2019 and December 31, 2018, respectively, and is included in other liabilities on the Consolidated Balance Sheets. Letters of credit are conditional commitments issued by banks to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements, including normal business activities, bond financing and similar transactions. Letters of credit are considered guarantees. The liability associated with letters of credit was $0.2 million as of June 30, 2019 and December 31, 2018. Contingent obligations to purchase loans funded by other entities include affordable housing plan guarantees, credit card guarantees, loans sold with recourse as well as obligations to the FHLB. 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) 2019 2018 Lines of credit $ 1,909,282 $ 1,894,030 Loans approved but not closed 299,081 258,778 Overdraft limits 152,207 153,572 Letters of credit 45,960 42,841 Contingent obligations and other guarantees 48,654 61,509 Contingent Liabilities — WesBanco is a party to various legal and administrative proceedings and claims. While any litigation contains an element of uncertainty, management does not believe that a material loss related to such proceedings or claims pending or known to be threatened is reasonably possible.

Business Segments

Business Segments	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Business Segments	NOTE 13. 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 $4.5 billion and $4.0 billion at June 30, 2019 and 2018, 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, 2019 Interest and dividend income $ 119,543 $ — $ 119,543 Interest expense 21,083 — 21,083 Net interest income 98,460 — 98,460 Provision for credit losses 2,747 — 2,747 Net interest income after provision for credit losses 95,713 — 95,713 Non-interest income 24,817 6,339 31,156 Non-interest expense 67,957 3,995 71,952 Income before provision for income taxes 52,573 2,344 54,917 Provision for income taxes 9,611 492 10,103 Net income $ 42,962 $ 1,852 $ 44,814 For The Three Months Ended June 30, 2018 Interest and dividend income $ 98,888 $ — $ 98,888 Interest expense 16,541 — 16,541 Net interest income 82,347 — 82,347 Provision for credit losses 1,708 — 1,708 Net interest income after provision for credit losses 80,639 — 80,639 Non-interest income 17,656 5,752 23,408 Non-interest expense 60,026 3,517 63,543 Income before provision for income taxes 38,269 2,235 40,504 Provision for income taxes 6,865 470 7,335 Net income $ 31,404 $ 1,765 $ 33,169 For the Six Months Ended June 30, 2019 Interest and dividend income $ 238,596 $ — $ 238,596 Interest expense 41,774 — 41,774 Net interest income 196,822 — 196,822 Provision for credit losses 5,254 — 5,254 Net interest income after provision for credit losses 191,568 — 191,568 Non-interest income 45,475 13,454 58,929 Non-interest expense 138,233 8,152 146,385 Income before provision for income taxes 98,810 5,302 104,112 Provision for income taxes 17,848 1,113 18,961 Net income $ 80,962 $ 4,189 $ 85,151 For the Six Months Ended June 30, 2018 Interest and dividend income $ 185,203 $ — $ 185,203 Interest expense 29,667 — 29,667 Net interest income 155,536 — 155,536 Provision for credit losses 3,876 — 3,876 Net interest income after provision for credit losses 151,660 — 151,660 Non-interest income 35,236 12,255 47,491 Non-interest expense 110,920 7,194 118,114 Income before provision for income taxes 75,976 5,061 81,037 Provision for income taxes 13,276 1,063 14,339 Net income $ 62,700 $ 3,998 $ 66,698 Total non-fiduciary assets of the trust and investment services segment were $3.9 million (including $2.6 million of trust customer intangibles) and $1.7 million at June 30, 2019 and 2018, respectively. All other assets, including goodwill and the remainder of other intangible assets, were allocated to the Community Banking segment.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	NOTE 14 SUBSEQUENT EVENTS On July 23, 2019, WesBanco and Old Line Bancshares, Inc. (“Old Line”), a bank holding company headquartered in Bowie, MD with approximately $3.1 billion in assets, $2.4 billion in loans, $2.4 billion deposits, $0.4 billion in stockholders’ equity and 37 branches, jointly announced that a definitive Agreement and Plan of Merger was executed providing for the merger of Old Line with and into WesBanco. On the date of the announcement, the transaction was valued at approximately $500.1 million. Under the terms of the Agreement and Plan of Merger (“Agreement”), which has been approved by that board of directors of both companies, WesBanco will exchange its common stock for Old Line common stock at closing, subject to customary conditions. Old Line options will be exchanged for WesBanco shares, as adjusted as to exercise price and number of options to take into account the fixed exchange ratio stated in the Agreement. Old Line stockholders will be entitled to receive 0.7844 shares of WesBanco common stock per each share of Old Line common stock for a total value of $29.22 per share, as of the date of the announcement. The receipt by Old Line stockholders of shares of WesBanco common stock in exchange for their shares of Old Line common stock is anticipated to qualify as a tax-free exchange. The acquisition is subject to the approvals of the appropriate banking regulatory authorities and the stockholders of Old Line and WesBanco. It is expected that the transaction will be completed in the fourth quarter of 2019 or first quarter of 2020.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation — The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2018. 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 2018 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. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on WesBanco’s net income and stockholders’ equity. 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 August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This ASU specifically aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software and hosting arrangements that include an internal-use software license. The ASU does not affect the accounting for the service element of a hosting arrangement that is a service contract. The guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. WesBanco is currently assessing the impact of ASU 2018-15 on WesBanco’s Consolidated Financial Statements. In August 2018, the FASB issued ASU 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans.” This ASU modifies ASC 715-20 to improve disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The guidance is effective for fiscal years ending after December 15, 2020. Early adoption is permitted. WesBanco is currently assessing the impact of ASU 2018-14 on WesBanco’s Consolidated Financial Statements. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU modifies the disclosure objective paragraphs of ASC 820 to eliminate (1) “at a minimum” from the phrase “an entity shall disclose at a minimum” and (2) other similar “open ended” disclosure requirements to promote the appropriate exercise of discretion of entities. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted, including adoption in an interim period. WesBanco is currently assessing the impact of ASU 2018-13 on WesBanco’s Consolidated Financial Statements. In September 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326)”, which 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 formed a cross-functional team to oversee the implementation of this ASU, and has completed an initial data gap assessment, finalized the loan segmentation procedures, and is currently evaluating the various forecasting and modeling assumptions, including qualitative factors, that will be used to estimate the initial current expected credit loss allowance. Substantial progress has been made on the identification and staging of data, development of models, refinement of economic forecasting processes, and documentation of accounting policy decisions. In conjunction with this implementation, WesBanco is reviewing business processes and evaluating potential changes to the control environment. Acquired loans or pools of loans that have experienced more-than-insignificant credit deterioration are deemed to be purchased credit deteriorated (“PCD”) loans, and are grossed-up on day 1 by the initial credit estimate through goodwill as opposed to the provision for credit losses. Acquired loans deemed not to be PCD loans will be adjusted to fair value through goodwill, with an allowance and corresponding provision for credit losses recorded in the first reporting period after acquisition through current period earnings, while the loan mark will accrete through interest income over the life of such loans. At acquisition, WesBanco will consider several factors as indicators that an acquired loan or pool of loans has experienced more-than-insignificant credit deterioration. These factors may include loans 30 days or more past due, loans with an internal risk grade of below average or lower, loans classified as non-accrual by the acquired institution, materiality of the credit and loans that have been previously modified in a troubled debt restructuring. Upon adoption of this standard, acquired loans from prior acquisitions that meet the guidelines under ASC 310-30 will be classified as PCD loans. The accretable portion of the loan mark as of adoption date will continue to accrete into interest income. However, the non-accretable portion of the loan mark will be added to the allowance upon adoption; while any reversals of such mark will flow through the allowance in future periods. The loan mark on ASC 310-20 loans (“the good book”) from acquisitions will continue to accrete through interest income over the life of such loans. WesBanco will perform parallel runs of the new methodology throughout the remainder of 2019 prior to adoption of the ASU. WesBanco currently anticipates that an increase to the allowance for credit losses may be recognized upon adoption to provide for expected credit losses over the estimated life of loan and investment receivables. The magnitude of the increase will depend on economic conditions and trends in the loan and securities portfolios at the time of adoption. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)”, which requires 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. For WesBanco, this update was effective for the fiscal year beginning January 1, 2019. In January 2018, the FASB issued ASU 2018-01, which allows entities the option to apply the provisions of the new lease guidance at the effective date without adjusting the comparative periods presented. In July 2018, the FASB issued ASU 2018-10, which provides narrow-scope improvements to the lease standard and ASU 2018-11, which allows entities to choose an additional transition method, under which an entity initially applies the new lease standard at the adoption date and recognizes a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. Under this transitional method, the entity shall recognize and measure the leases that exist at the adoption date and the prior comparative periods are not adjusted. WesBanco adopted this ASU as of January 1, 2019 using the transitional method. In addition, WesBanco utilized certain practical expedients including the following - retained the classifications of existing leases, no re-assessment to determine if existing leases have initial direct costs and utilized hindsight when determining the lease term and assessment of impairment in existing leases. WesBanco capitalized $20 million for right-of-use assets and lease liabilities, net of existing straight-line lease liabilities and unfavorable acquired lease liabilities. See additional disclosures in Note 6, “Leases”. In August 2017, the FASB issued ASU 2017-12, “Targeted Improvements to Accounting for Hedging Activities.” The new guidance makes more financial and nonfinancial hedging strategies eligible for hedge accounting. It also amended the presentation and disclosure requirements and changed how companies assess effectiveness. It was intended to more closely align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The guidance was effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. For WesBanco, this update was effective for the fiscal year beginning January 1, 2019. Upon adoption, WesBanco reclassified $67.3 million of callable held-to-maturity municipal debt securities to available-for-sale debt securities. In October 2018, the FASB issued ASU 2018-16, “Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes.” This ASU modifies ASC 815 for eligible benchmark interest rates. Due to concerns about the sustainability of the London Interbank Offered Rate (LIBOR), the Federal Reserve initiated an effort to introduce an alternative reference rate in the United States. The Overnight Index Swap (OIS) rate, which is based on SOFR is permitted as a U.S. benchmark interest rate for hedge accounting purposes. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. For WesBanco, this update was effective for the fiscal year beginning January 1, 2019. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

Mergers and Acquisitions (Table

Mergers and Acquisitions (Tables) - Farmers Capital Bank Corporation [Member]	6 Months Ended
	Jun. 30, 2019
Summary of Purchase Price of Acquisition and Resulting Goodwill	The preliminary purchase price of the FFKT acquisition and resulting goodwill is summarized as follows: (unaudited, in thousands) August 20, 2018 Purchase price: Fair value of WesBanco shares issued $ 391,267 Cash consideration for outstanding FFKT shares 37,634 Total purchase price $ 428,901 Fair value of: Tangible assets acquired $ 1,369,536 Core deposit and other intangible assets acquired 39,992 Liabilities assumed (1,431,663 ) Net cash received in the acquisition 230,139 Fair value of net assets acquired 208,004 Goodwill recognized $ 220,897
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, as WesBanco intends to finalize its accounting for the acquisition of FFKT within one year from the date of acquisition: (unaudited, in thousands) August 20, 2018 Assets acquired Cash and due from banks $ 230,139 Securities 239,321 Loans 1,025,800 Goodwill and other intangible assets 260,889 Accrued income and other assets 104,415 Total assets acquired $ 1,860,564 Liabilities assumed Deposits $ 1,330,328 Borrowings 71,780 Accrued expenses and other liabilities 29,555 Total liabilities assumed $ 1,431,663 Net assets acquired $ 428,901
Purchase Price Allocation Adjustment [Member]
Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The following table presents the changes in the allocation of the purchase price of the assets acquired and the liabilities assumed at the date of the acquisition previously reported as of March 31, 2019: (unaudited, in thousands) August 20, 2018 Goodwill recognized as of March 31, 2019 $ 219,418 Change in fair value of net assets acquired: Assets Other real estate owned (80 ) Accrued income and other assets 430 Liabilities Accrued expenses and other liabilities (1,829 ) Fair value of net assets acquired $ (1,479 ) Increase in goodwill recognized 1,479 Goodwill recognized as of June 30, 2019 $ 220,897

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Summary of Earnings Per Common Share	Earnings per common share are calculated as follows: For the Three Months Ended June 30, For the Six Months Ended June 30, (unaudited, in thousands, except shares and per share amounts) 2019 2018 2019 2018 Numerator for both basic and diluted earnings per common share: Net income $ 44,814 $ 33,169 $ 85,151 $ 66,698 Denominator: Total average basic common shares outstanding 54,628,029 46,498,305 54,613,346 45,281,264 Effect of dilutive stock options and other stock compensation 105,492 141,475 110,863 135,746 Total diluted average common shares outstanding 54,733,521 46,639,780 54,724,209 45,417,010 Earnings per common share - basic $ 0.82 $ 0.71 $ 1.56 $ 1.47 Earnings per common share - diluted $ 0.82 $ 0.71 $ 1.56 $ 1.47

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2019
Investments Debt And Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Value 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 debt securities: June 30, 2019 December 31, 2018 (unaudited, in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Available-for-sale debt securities U.S. Treasury $ 29,705 $ 76 $ — $ 29,781 $ 19,882 $ 3 $ (7 ) $ 19,878 U.S. Government sponsored entities and agencies 130,578 4,147 (138 ) 134,587 142,852 556 (1,756 ) 141,652 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 1,550,885 17,598 (5,441 ) 1,563,042 1,585,864 2,912 (27,521 ) 1,561,255 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 175,355 3,417 (116 ) 178,656 171,671 264 (2,963 ) 168,972 Obligations of states and political subdivisions 177,888 5,305 (15 ) 183,178 184,057 2,039 (982 ) 185,114 Corporate debt securities 39,695 499 (154 ) 40,040 37,730 87 (559 ) 37,258 Total available-for-sale debt securities $ 2,104,106 $ 31,042 $ (5,864 ) $ 2,129,284 $ 2,142,056 $ 5,861 $ (33,788 ) $ 2,114,129 Held-to-maturity debt securities U.S. Government sponsored entities and agencies $ 10,020 $ 36 $ (104 ) $ 9,952 $ 10,823 $ 6 $ (329 ) $ 10,500 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 136,929 834 (642 ) 137,121 148,300 204 (4,170 ) 144,334 Obligations of states and political subdivisions 720,399 19,566 (216 ) 739,749 828,520 8,771 (4,012 ) 833,279 Corporate debt securities 33,257 1,455 — 34,712 33,291 12 (673 ) 32,630 Total held-to-maturity debt securities $ 900,605 $ 21,891 $ (962 ) $ 921,534 $ 1,020,934 $ 8,993 $ (9,184 ) $ 1,020,743 Total debt securities $ 3,004,711 $ 52,933 $ (6,826 ) $ 3,050,818 $ 3,162,990 $ 14,854 $ (42,972 ) $ 3,134,872
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 debt securities by contractual maturity at June 30, 2019. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date. June 30, 2019 (unaudited, in thousands) One Year or less One to Five Years Five to Ten Years After Ten Years Mortgage- backed securities Total Available-for-sale debt securities U.S. Treasury $ 29,781 $ — $ — $ — $ — $ 29,781 U.S. Government sponsored entities and agencies 498 6,048 18,472 9,363 100,206 134,587 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 1,563,042 1,563,042 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 178,656 178,656 Obligations of states and political subdivisions 8,108 53,422 76,671 44,977 — 183,178 Corporate debt securities 627 32,216 7,197 — — 40,040 Total available-for-sale debt securities $ 39,014 $ 91,686 $ 102,340 $ 54,340 $ 1,841,904 $ 2,129,284 Held-to-maturity debt securities (2) U.S. Government sponsored entities and agencies $ — $ — $ — $ — $ 9,952 $ 9,952 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1) — — — — 137,121 137,121 Obligations of states and political subdivisions 15,652 115,724 334,357 274,016 — 739,749 Corporate debt securities — 10,913 23,799 — — 34,712 Total held-to-maturity debt securities $ 15,652 $ 126,637 $ 358,156 $ 274,016 $ 147,073 $ 921,534 Total debt securities $ 54,666 $ 218,323 $ 460,496 $ 328,356 $ 1,988,977 $ 3,050,818 (1) (2)
Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities	The following table presents the gross realized gains and losses on sales and calls of available-for-sale and held-to-maturity debt securities, as well as gains and losses on equity securities from both sales and market adjustments from the adoption of ASU 2016-01 effective January 1, 2018 for the three and six months ended June 30, 2019 and 2018, respectively. For the Three Months Ended June 30, For the Six Months Ended June 30, (unaudited, in thousands) 2019 2018 2019 2018 Debt securities: Gross realized gains $ 106 $ 5 $ 348 $ 12 Gross realized losses (18 ) — (209 ) (18 ) Net gains (losses) on debt securities $ 88 $ 5 $ 139 $ (6 ) Equity securities: Net unrealized gains recognized on securities still held $ 265 $ 347 $ 868 $ 319 Net realized gains recognized on securities sold 2,556 6 2,559 6 Net gains on equity securities $ 2,821 $ 353 $ 3,427 $ 325 Net securities gains $ 2,909 $ 358 $ 3,566 $ 319
Schedule of Unrealized Losses on Investment Securities	The following tables provide information on unrealized losses on debt securities that have been in an unrealized loss position for less than twelve months and twelve months or more as of June 30, 2019 and December 31, 2018, respectively: June 30, 2019 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 $ — $ — — $ 28,542 $ (242 ) 7 $ 28,542 $ (242 ) 7 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 30,301 (95 ) 4 564,036 (5,988 ) 211 594,337 (6,083 ) 215 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 3,783 (26 ) 4 26,655 (90 ) 12 30,438 (116 ) 16 Obligations of states and political subdivisions 609 (1 ) 2 38,999 (230 ) 76 39,608 (231 ) 78 Corporate debt securities 7,920 (111 ) 3 1,947 (43 ) 1 9,867 (154 ) 4 Total temporarily impaired securities $ 42,613 $ (233 ) 13 $ 660,179 $ (6,593 ) 307 $ 702,792 $ (6,826 ) 320 December 31, 2018 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. Treasury $ 9,972 $ (7 ) 1 $ — $ — — $ 9,972 $ (7 ) 1 U.S. Government sponsored entities and agencies 18,926 (148 ) 8 76,385 (1,937 ) 14 95,311 (2,085 ) 22 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 285,534 (1,862 ) 44 922,698 (29,829 ) 291 1,208,232 (31,691 ) 335 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 9,186 (18 ) 6 111,068 (2,945 ) 14 120,254 (2,963 ) 20 Obligations of states and political subdivisions 104,469 (439 ) 207 303,681 (4,555 ) 513 408,150 (4,994 ) 720 Corporate debt securities 38,791 (898 ) 18 11,452 (334 ) 5 50,243 (1,232 ) 23 Total temporarily impaired securities $ 466,878 $ (3,372 ) 284 $ 1,425,284 $ (39,600 ) 837 $ 1,892,162 $ (42,972 ) 1,121

Loans and the Allowance for C_2

Loans and the Allowance for Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2019
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. Net deferred loan costs were $4.2 million and $3.2 million at June 30, 2019 and December 31, 2018, respectively. The unamortized discount on purchased loans from acquisitions was $40.1 million at June 30, 2019, including $19.0 million related to FFKT, and $49.3 million at December 31, 2018. June 30, December 31, (unaudited, in thousands) 2019 2018 Commercial real estate: Land and construction $ 483,046 $ 528,072 Improved property 3,394,587 3,325,623 Total commercial real estate 3,877,633 3,853,695 Commercial and industrial 1,300,577 1,265,460 Residential real estate 1,633,613 1,611,607 Home equity 590,303 599,331 Consumer 335,728 326,188 Total portfolio loans 7,737,854 7,656,281 Loans held for sale 18,649 8,994 Total loans $ 7,756,503 $ 7,665,275
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, 2019 and 2018 (unaudited, in thousands) Commercial Real Estate - Land and Construction Commercial Real Estate -Improved Property Commercial & Industrial Residential Real Estate Home Equity Consumer Deposit Overdraft Total Balance at December 31, 2018 Allowance for loan losses $ 4,039 $ 20,848 $ 12,114 $ 3,822 $ 4,356 $ 2,797 $ 972 $ 48,948 Allowance for loan commitments 169 33 262 12 226 39 — 741 Total beginning allowance for credit losses 4,208 20,881 12,376 3,834 4,582 2,836 972 49,689 Provision for credit losses: Provision for loan losses (538 ) 1,459 1,309 124 423 333 1,119 4,229 Provision for loan commitments 18 (9 ) 995 1 23 (3 ) — 1,025 Total provision for credit losses (520 ) 1,450 2,304 125 446 330 1,119 5,254 Charge-offs — (285 ) (1,025 ) (679 ) (673 ) (1,344 ) (860 ) (4,866 ) Recoveries 200 345 489 188 215 896 215 2,548 Net charge-offs 200 60 (536 ) (491 ) (458 ) (448 ) (645 ) (2,318 ) Balance at June 30, 2019 Allowance for loan losses 3,701 22,367 12,887 3,455 4,321 2,682 1,446 50,859 Allowance for loan commitments 187 24 1,257 13 249 36 — 1,766 Total ending allowance for credit losses $ 3,888 $ 22,391 $ 14,144 $ 3,468 $ 4,570 $ 2,718 $ 1,446 $ 52,625 Balance at December 31, 2017 Allowance for loan losses $ 3,117 $ 21,166 $ 9,414 $ 3,206 $ 4,497 $ 3,063 $ 821 $ 45,284 Allowance for loan commitments 119 26 173 7 212 37 — 574 Total beginning allowance for credit losses 3,236 21,192 9,587 3,213 4,709 3,100 821 45,858 Provision for credit losses: Provision for loan losses 1,465 (1,774 ) 2,100 944 54 615 439 3,843 Provision for loan commitments 44 (8 ) 2 2 (7 ) — — 33 Total provision for credit losses 1,509 (1,782 ) 2,102 946 47 615 439 3,876 Charge-offs (136 ) (692 ) (616 ) (509 ) (672 ) (1,793 ) (541 ) (4,959 ) Recoveries 264 776 636 252 279 1,066 197 3,470 Net charge-offs 128 84 20 (257 ) (393 ) (727 ) (344 ) (1,489 ) Balance at June 30, 2018 Allowance for loan losses 4,710 19,476 11,534 3,893 4,158 2,951 916 47,638 Allowance for loan commitments 163 18 175 9 205 37 — 607 Total ending allowance for credit losses $ 4,873 $ 19,494 $ 11,709 $ 3,902 $ 4,363 $ 2,988 $ 916 $ 48,245
Allowance for Credit Losses and Recorded Investments in Loans	The following tables present the allowance for credit losses and recorded investments in loans by category: Allowance for Credit Losses and Recorded Investment in Loans (unaudited, in thousands) Commercial Real Estate- Land and Construction Commercial Real Estate- Improved Property Commercial and Industrial Residential Real Estate Home Equity Consumer Deposit Over- draft Total June 30, 2019 Allowance for credit losses: Allowance for loans individually evaluated for impairment $ — $ 1,479 $ 11 $ 12 $ 8 $ 1 $ — $ 1,511 Allowance for loans collectively evaluated for impairment 3,701 20,888 12,876 3,443 4,313 2,681 1,446 49,348 Allowance for loan commitments 187 24 1,257 13 249 36 — 1,766 Total allowance for credit losses $ 3,888 $ 22,391 $ 14,144 $ 3,468 $ 4,570 $ 2,718 $ 1,446 $ 52,625 Portfolio loans: Individually evaluated for impairment (1) $ — $ 5,157 $ 192 $ 4,922 $ 922 $ 74 $ — $ 11,267 Collectively evaluated for impairment 482,804 3,381,541 1,299,528 1,627,047 589,381 335,654 — 7,715,955 Acquired with deteriorated credit quality 242 7,889 857 1,644 — — — 10,632 Total portfolio loans $ 483,046 $ 3,394,587 $ 1,300,577 $ 1,633,613 $ 590,303 $ 335,728 $ — $ 7,737,854 December 31, 2018 Allowance for credit losses: Allowance for loans individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ — $ — Allowance for loans collectively evaluated for impairment 4,039 20,848 12,114 3,822 4,356 2,797 972 48,948 Allowance for loan commitments 169 33 262 12 226 39 — 741 Total allowance for credit losses $ 4,208 $ 20,881 $ 12,376 $ 3,834 $ 4,582 $ 2,836 $ 972 $ 49,689 Portfolio loans: Individually evaluated for impairment (1) $ — $ — $ — $ — $ — $ — $ — $ — Collectively evaluated for impairment 527,737 3,319,672 1,264,560 1,609,177 599,331 326,063 — 7,646,540 Acquired with deteriorated credit quality 335 5,951 900 2,430 — 125 — 9,741 Total portfolio loans $ 528,072 $ 3,325,623 $ 1,265,460 $ 1,611,607 $ 599,331 $ 326,188 $ — $ 7,656,281 (1 )
Summary of Commercial Loans by Risk Grade	The following tables summarize commercial loans by their assigned risk grade: Commercial Loans by Internally Assigned Risk Grade (unaudited, in thousands) Commercial Real Estate- Land and Construction Commercial Real Estate- Improved Property Commercial & Industrial Total Commercial Loans As of June 30, 2019 Pass $ 476,109 $ 3,319,270 $ 1,268,591 $ 5,063,970 Criticized - compromised 5,794 52,657 14,785 73,236 Classified - substandard 1,143 22,660 17,201 41,004 Classified - doubtful — — — — Total $ 483,046 $ 3,394,587 $ 1,300,577 $ 5,178,210 As of December 31, 2018 Pass $ 523,707 $ 3,267,304 $ 1,245,190 $ 5,036,201 Criticized - compromised 2,297 35,566 13,847 51,710 Classified - substandard 2,068 22,753 6,423 31,244 Classified - doubtful — — — — Total $ 528,072 $ 3,325,623 $ 1,265,460 $ 5,119,155
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 June 30, June 30, (unaudited, in thousands) 2019 2018 Balance at beginning of period $ 6,203 $ 1,724 Acquisitions 1,300 — Reduction due to change in projected cash flows (960 ) (86 ) Reclass from non-accretable difference 839 5,877 Transfers out — — Accretion (2,240 ) (440 ) Balance at end of period $ 5,142 $ 7,075
Summary of Age Analysis of Loan Categories	The following tables summarize the age analysis of all categories of loans: Age Analysis of Loans (unaudited, in thousands) Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Total Past Due Total Loans 90 Days or More Past Due and Accruing (1) As of June 30, 2019 Commercial real estate: Land and construction $ 482,016 $ 965 $ 45 $ 20 $ 1,030 $ 483,046 $ — Improved property 3,382,311 2,297 1,486 8,493 12,276 3,394,587 587 Total commercial real estate 3,864,327 3,262 1,531 8,513 13,306 3,877,633 587 Commercial and industrial 1,296,878 922 142 2,635 3,699 1,300,577 97 Residential real estate 1,617,430 5,962 2,449 7,772 16,183 1,633,613 1,173 Home equity 584,058 2,073 412 3,760 6,245 590,303 533 Consumer 333,279 1,682 506 261 2,449 335,728 244 Total portfolio loans 7,695,972 13,901 5,040 22,941 41,882 7,737,854 2,634 Loans held for sale 18,649 — — — — 18,649 — Total loans $ 7,714,621 $ 13,901 $ 5,040 $ 22,941 $ 41,882 $ 7,756,503 $ 2,634 Impaired loans included above are as follows: Non-accrual loans $ 9,310 $ 1,170 $ 2,169 $ 20,249 23,588 $ 32,898 TDRs accruing interest (1) 5,273 10 146 58 214 5,487 Total impaired $ 14,583 $ 1,180 $ 2,315 $ 20,307 $ 23,802 $ 38,385 As of December 31, 2018 Commercial real estate: Land and construction $ 526,660 $ 62 $ 1,350 $ — $ 1,412 $ 528,072 $ — Improved property 3,314,765 2,266 2,250 6,342 10,858 3,325,623 175 Total commercial real estate 3,841,425 2,328 3,600 6,342 12,270 3,853,695 175 Commercial and industrial 1,261,536 323 594 3,007 3,924 1,265,460 13 Residential real estate 1,593,519 2,717 5,001 10,370 18,088 1,611,607 2,820 Home equity 591,623 2,500 1,273 3,935 7,708 599,331 705 Consumer 322,584 2,084 1,007 513 3,604 326,188 364 Total portfolio loans 7,610,687 9,952 11,475 24,167 45,594 7,656,281 4,077 Loans held for sale 8,994 — — — — 8,994 — Total loans $ 7,619,681 $ 9,952 $ 11,475 $ 24,167 $ 45,594 $ 7,665,275 $ 4,077 Impaired loans included above are as follows: Non-accrual loans $ 8,910 $ 337 $ 1,370 $ 20,083 21,790 $ 30,700 TDRs accruing interest (1) 5,586 59 92 7 158 5,744 Total impaired $ 14,496 $ 396 $ 1,462 $ 20,090 $ 21,948 $ 36,444 (1)
Summary of Impaired Loans	The following tables summarize impaired loans: Impaired Loans June 30, 2019 December 31, 2018 Unpaid Unpaid Principal Recorded Related Principal Recorded Related (unaudited, in thousands) Balance (1) Investment Allowance Balance (1) Investment Allowance With no related specific allowance recorded: Commercial real estate: Land and construction $ 347 $ 295 $ — $ — $ — $ — Improved property 13,499 7,312 — 14,038 9,293 — Commercial and industrial 4,086 2,854 — 4,610 3,428 — Residential real estate 13,572 11,896 — 20,270 18,016 — Home equity 5,247 4,450 — 5,924 5,036 — Consumer 416 311 — 846 671 — Total impaired loans without a specific allowance 37,167 27,118 — 45,688 36,444 — With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — Improved property 5,211 5,157 1,479 — — — Commercial and industrial 194 192 11 — — — Residential real estate 5,358 4,922 12 — — — Home equity 990 922 8 — — — Consumer 113 74 1 — — — Total impaired loans with a specific allowance 11,866 11,267 1,511 — — — Total impaired loans $ 49,033 $ 38,385 $ 1,511 $ 45,688 $ 36,444 $ — (1) Impaired Loans For the Three Months Ended For the Six Months Ended June 30, 2019 June 30, 2018 June 30, 2019 June 30, 2018 Average Interest Average Interest Average Interest Average Interest Recorded Income Recorded Income Recorded Income Recorded Income (unaudited, in thousands) Investment Recognized Investment Recognized Investment Recognized Investment Recognized With no related specific allowance recorded: Commercial real estate: Land and construction $ 290 $ — $ 400 $ — $ 193 $ — $ 346 $ — Improved property 7,287 — 10,604 23 7,955 — 11,357 368 Commercial and industrial 2,961 — 3,036 2 3,116 — 3,008 4 Residential real estate 11,845 — 18,264 61 13,902 — 18,434 127 Home equity 4,487 — 5,068 6 4,670 — 5,098 11 Consumer 337 — 758 2 448 — 823 5 Total impaired loans without a specific allowance 27,207 — 38,130 94 30,284 — 39,066 515 With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — — — Improved property 3,645 14 1,052 — 2,430 28 1,403 — Commercial and industrial 250 4 — — 166 7 — — Residential real estate 5,000 60 — — 3,333 118 — — Home equity 859 7 — — 573 15 — — Consumer 89 1 — — 59 2 — — Total impaired loans with a specific allowance 9,843 86 1,052 — 6,561 170 1,403 — Total impaired loans $ 37,050 $ 86 $ 39,182 $ 94 $ 36,845 $ 170 $ 40,469 $ 515
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) June 30, December 31, (unaudited, in thousands) 2019 2018 Commercial real estate: Land and construction $ 295 $ — Improved property 11,726 8,413 Total commercial real estate 12,021 8,413 Commercial and industrial 2,854 3,260 Residential real estate 12,813 13,831 Home equity 4,886 4,610 Consumer 324 586 Total $ 32,898 $ 30,700 (1) TDRs June 30, 2019 December 31, 2018 (unaudited, in thousands) Accruing Non-Accrual Total Accruing Non-Accrual Total Commercial real estate: Land and construction $ — $ — $ — $ — $ — $ — Improved property 743 558 1,301 880 1,529 2,409 Total commercial real estate 743 558 1,301 880 1,529 2,409 Commercial and industrial 192 — 192 168 169 337 Residential real estate 4,005 917 4,922 4,185 921 5,106 Home equity 486 436 922 426 198 624 Consumer 61 13 74 85 38 123 Total $ 5,487 $ 1,924 $ 7,411 $ 5,744 $ 2,855 $ 8,599
Loans Identified as TDRs	The following tables present details related to loans identified as TDRs during the three and six months ended June 30, 2019 and 2018, respectively: New TDRs (1) For the Three Months Ended June 30, 2019 June 30, 2018 Pre- Post- Pre- Post- Modification Modification Modification Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded (unaudited, dollars in thousands) Modifications Investment Investment Modifications Investment Investment Commercial real estate: Land and construction — $ — $ — — $ — $ — Improved Property — — — — — — Total commercial real estate — — — — — — Commercial and industrial 1 44 40 1 9 9 Residential real estate — — — — — — Home equity 1 199 156 1 20 20 Consumer — — — 2 39 36 Total 2 $ 243 $ 196 4 $ 68 $ 65 (1) New TDRs (1) For the Six Months Ended June 30, 2019 June 30, 2018 Pre- Post- Pre- Post- Modification Modification Modification Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded (unaudited, dollars in thousands) Modifications Investment Investment Modifications Investment Investment Commercial real estate: Land and construction — $ — $ — — $ — $ — Improved Property — — — — — — Total commercial real estate — — — — — — Commercial and industrial 1 44 40 1 10 9 Residential real estate 4 194 188 5 203 185 Home equity 3 386 340 1 20 20 Consumer 1 15 13 4 45 38 Total 9 $ 639 $ 581 11 $ 278 $ 252 (1) The following table summarizes TDRs which defaulted (defined as past due 90 days) during the six months ended June 30, 2019 and 2018, respectively, that were restructured within the last twelve months prior to June 30, 2019 and 2018, respectively: Defaulted TDRs (1) For the Six Months Ended June 30, 2019 June 30, 2018 Number of Recorded Number of Recorded (unaudited, dollars in thousands) Defaults Investment Defaults Investment Commercial real estate: Land and construction — $ — — $ — Improved property — — 1 145 Total commercial real estate — — 1 145 Commercial and industrial — — — — Residential real estate 1 97 1 121 Home equity — — 1 7 Consumer 1 13 — — Total 2 $ 110 3 $ 273 (1)
Summary of Other Real Estate Owned and Repossessed Assets	The following table summarizes other real estate owned and repossessed assets included in other assets: June 30, December 31, (unaudited, in thousands) 2019 2018 Other real estate owned $ 4,891 $ 7,173 Repossessed assets 82 92 Total other real estate owned and repossessed assets $ 4,973 $ 7,265

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Future Minimum Lease Payments Under Non-cancellable Leases	Future minimum lease payments under non-cancellable leases with initial or remaining lease terms in excess of one year at June 30, 2019 are as follows ( unaudited, in thousands Year Amount 2020 $ 755 2021 2,444 2022 1,713 2023 2,227 2024 and thereafter 17,686 Total lease payments $ 24,825 Less: Interest (3,621 ) Present value of lease liabilities $ 21,204

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Summary of Fair Values of Derivative Instruments on Balance Sheets	The table below presents the fair value of WesBanco’s derivative financial instruments as well as their classification on the Balance Sheet as of June 30, 2019 and December 31, 2018: June 30, 2019 December 31, 2018 (unaudited, in thousands) Notional or Contractual Amount Asset Derivatives Liability Derivatives Notional or Contractual Amount Asset Derivatives Liability Derivatives Derivatives Loan Swaps: Interest rate swaps $ 320,134 $ 13,281 $ 14,774 $ 229,778 $ 4,650 $ 5,081 Other contracts: Interest rate loan commitments 44,062 58 — 16,113 125 — Forward TBA contracts 61,000 — 166 20,000 — 234 Total derivatives $ 13,339 $ 14,940 $ 4,775 $ 5,315
Summary of Effect of Derivative Instruments on Income Statement	The table below presents the change in the fair value of the Company’s derivative financial instruments reflected within the other non-interest income line item of the consolidated income statement for the three and six months ended June 30, 2019 and 2018, respectively. For the Three Months Ended June 30, For the Six Months Ended June 30, (unaudited, in thousands) Location of Gain/(Loss) 2019 2018 2019 2018 Interest rate swaps Other income $ (751 ) $ 44 $ (1,063 ) $ 211 Interest rate loan commitments Mortgage banking income (97 ) 7 (67 ) 143 Forward TBA contracts Mortgage banking income (518 ) (11 ) (852 ) 399 Total $ (1,366 ) $ 40 $ (1,982 ) $ 753

Pension & Postretirement Medi_2

Pension & Postretirement Medical Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Compensation And Retirement Disclosure [Abstract]
Schedule of Defined Benefit 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 June 30, For the Six Months Ended June 30, (unaudited, in thousands) 2019 2018 2019 2018 Service cost – benefits earned during year $ 560 $ 707 $ 1,114 $ 1,406 Interest cost on projected benefit obligation 1,313 1,228 2,611 2,442 Expected return on plan assets (2,211 ) (2,390 ) (4,398 ) (4,753 ) Amortization of prior service cost 6 7 13 13 Amortization of net loss 808 758 1,607 1,508 Net periodic pension cost $ 476 $ 310 $ 947 $ 616

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	6 Months Ended
	Jun. 30, 2019
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 valu e hierarchy as of June 30, 2019 and December 31, 2018 : June 30, 2019 Fair Value Measurements Using: June 30, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (unaudited, in thousands) 2019 (level 1) (level 2) (level 3) Recurring fair value measurements Equity securities $ 11,817 $ 11,817 $ — $ — Available-for-sale debt securities U.S. Treasury 29,781 — 29,781 — U.S. Government sponsored entities and agencies 134,587 — 134,587 — Residential mortgage-backed securities and collateralized mortgage obligations of government agencies 1,563,042 — 1,563,042 — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 178,656 — 178,656 — Obligations of state and political subdivisions 183,178 — 181,576 1,602 Corporate debt securities 40,040 — 40,040 — Total available-for-sale debt securities $ 2,129,284 $ — $ 2,127,682 $ 1,602 Loans held for sale 18,649 — 18,649 — Other assets - interest rate derivatives agreements 13,281 — 13,281 — Total assets recurring fair value measurements $ 2,173,031 $ 11,817 $ 2,159,612 $ 1,602 Other liabilities - interest rate derivatives agreements $ 14,774 $ — $ 14,774 $ — Total liabilities recurring fair value measurements $ 14,774 $ — $ 14,774 $ — Nonrecurring fair value measurements Impaired Loans $ 2,434 — — $ 2,434 Other real estate owned and repossessed assets 4,973 — — 4,973 Total nonrecurring fair value measurements $ 7,407 $ — $ — $ 7,407 December 31, 2018 Fair Value Measurements Using: December 31, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (in thousands) 2018 (level 1) (level 2) (level 3) Recurring fair value measurements Equity securities $ 11,737 $ 11,737 $ — $ — Available-for-sale debt securities U.S. Treasury 19,878 — 19,878 — U.S. Government sponsored entities and agencies 141,652 — 141,652 — Residential mortgage-backed securities and collateralized mortgage obligations of government agencies 1,561,255 — 1,561,255 — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 168,972 — 168,972 — Obligations of state and political subdivisions 185,114 — 183,611 1,503 Corporate debt securities 37,258 — 37,258 — Total available-for-sale debt securities $ 2,114,129 $ — $ 2,112,626 $ 1,503 Loans held for sale 8,994 — 8,994 — Other assets - interest rate derivatives agreements 4,650 — 4,650 — Total assets recurring fair value measurements $ 2,139,510 $ 11,737 $ 2,126,270 $ 1,503 Other liabilities - interest rate derivatives agreements $ 5,081 $ — $ 5,081 $ — Total liabilities recurring fair value measurements $ 5,081 $ — $ 5,081 $ — Nonrecurring fair value measurements Other real estate owned and repossessed assets 7,265 — — 7,265 Total nonrecurring fair value measurements $ 7,265 $ — $ — $ 7,265
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, 2019 Impaired loans $ 2,434 Appraisal of collateral (1) Appraisal adjustments (2) (30.5%)/((30.5%) Liquidation expenses (2) (5.1%)/((5.1%) Other real estate owned and repossessed assets $ 4,973 Appraisal of collateral (1), (3) December 31, 2018 Other real estate owned and repossessed assets $ 7,265 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 expense are presented as a percent of the appraisal. (3) Includes estimated liquidation expense and numerous dissimilar qualitative adjustments by management, which are not identifiable.
Estimates Fair Values of Financial Instruments	Fair Value Measurements at June 30, 2019 Carrying Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (unaudited, in thousands) Amount Estimate (level 1) (level 2) (level 3) Financial Assets Cash and due from banks $ 194,355 $ 194,355 $ 194,355 $ — $ — Equity securities 11,817 11,817 11,817 — — Available-for-sale debt securities 2,129,284 2,129,284 — 2,127,682 1,602 Held-to-maturity debt securities 900,605 921,534 — 920,989 545 Net loans 7,686,995 7,674,887 — — 7,674,887 Loans held for sale 18,649 18,649 — 18,649 — Other assets - interest rate derivatives 13,281 13,281 — 13,281 — Accrued interest receivable 38,450 38,450 38,450 — — Financial Liabilities Deposits 8,694,928 8,695,779 7,329,812 1,365,967 — Federal Home Loan Bank borrowings 1,121,283 1,127,210 — 1,127,210 — Other borrowings 296,148 296,574 293,205 3,369 — Subordinated debt and junior subordinated debt 156,534 144,410 — 144,410 — Other liabilities - interest rate derivatives 14,774 14,774 — 14,774 — Accrued interest payable 6,559 6,559 6,559 — — Fair Value Measurements at December 31, 2018 Carrying Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (in thousands) Amount Estimate (level 1) (level 2) (level 3) Financial Assets Cash and due from banks $ 169,186 $ 169,186 $ 169,186 $ — $ — Equity securities 11,737 11,737 11,737 — — Available-for-sale debt securities 2,114,129 2,114,129 — 2,112,626 1,503 Held-to-maturity debt securities 1,020,934 1,020,743 — 1,020,195 548 Net loans 7,607,333 7,422,825 — — 7,422,825 Loans held for sale 8,994 8,994 — 8,994 — Other assets - interest rate derivatives 4,650 4,650 — 4,650 — Accrued interest receivable 38,853 38,853 38,853 — — Financial Liabilities Deposits 8,831,633 8,836,390 7,376,023 1,460,367 — Federal Home Loan Bank borrowings 1,054,174 1,051,401 — 1,051,401 — Other borrowings 290,522 290,854 288,918 1,936 — Subordinated debt and junior subordinated debt 189,842 174,448 — 174,448 — Other liabilities - interest rate derivatives 5,081 5,081 — 5,081 — Accrued interest payable 4,627 4,627 4,627 — —

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue Recognition [Abstract]
Summary of Revenue Recognition	The following table summarizes the point of revenue recognition and the income recognized for each of the revenue streams for the three and six months ended June 30, 2019 and 2018, respectively: Point of Revenue For the Three Months Ended June 30, For the Six Months Ended June 30, (unaudited, in thousands) Recognition 2019 2018 2019 2018 Revenue Streams Trust fees Trust account fees Over time $ 4,208 $ 3,558 $ 9,263 $ 7,850 WesMark fees Over time 2,131 2,194 4,191 4,405 Total trust fees 6,339 5,752 13,454 12,255 Service charges on deposits Commercial banking fees Over time 499 462 967 869 Personal service charges At a point in time & over time 5,698 4,684 11,780 9,100 Total service charges on deposits 6,197 5,146 12,747 9,969 Net securities brokerage revenue Annuity commissions At a point in time 1,454 1,310 2,815 2,510 Equity and debt security trades At a point in time 103 87 206 189 Managed money Over time 174 163 331 304 Trail commissions Over time 242 249 481 476 Total net securities brokerage revenue 1,973 1,809 3,833 3,479 Payment processing fees (1) At a point in time & over time 785 — 1,433 — Electronic banking fees At a point in time 7,154 5,728 13,046 10,558 Mortgage banking income At a point in time 1,618 1,670 2,674 2,776 Net gain on other real estate owned and other assets At a point in time 376 229 512 491 (1)

Comprehensive Income_(Loss) (Ta

Comprehensive Income/(Loss) (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Components of Accumulated Other Comprehensive Income	The activity in accumulated other comprehensive income for the six months ended June 30, 2019 and 2018 is as follows: Accumulated Other Comprehensive Income/(Loss) (1) (unaudited, in thousands) Defined Benefit Plans Unrealized Gains (Losses) on Debt Securities Available-for-Sale Unrealized Gains on Debt Securities Transferred from Available-for-Sale to Held-to-Maturity Total Balance at December 31, 2018 $ (16,542 ) $ (21,522 ) $ 193 $ (37,871 ) Other comprehensive income before reclassifications — 40,996 — 40,996 Amounts reclassified from accumulated other comprehensive income 1,129 (30 ) (111 ) 988 Period change 1,129 40,966 (111 ) 41,984 Balance at June 30, 2019 $ (15,413 ) $ 19,444 $ 82 $ 4,113 Balance at December 31, 2017 $ (18,626 ) $ (13,250 ) $ 381 $ (31,495 ) Other comprehensive income before reclassifications — (21,720 ) — (21,720 ) Amounts reclassified from accumulated other comprehensive income 1,026 — (100 ) 926 Period change 1,026 (21,720 ) (100 ) (20,794 ) Adoption of Accounting Standard ASU 2016-01 — (1,063 ) — (1,063 ) Balance at June 30, 2018 $ (17,600 ) $ (36,033 ) $ 281 $ (53,352 ) (1 )
Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income/(Loss)	The following table provides details about amounts reclassified from accumulated other comprehensive income for the three and six months ended June 30, 2019 and 2018, respectively: Details about Accumulated Other Comprehensive Income/(Loss) Components 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) 2019 2018 2019 2018 Debt securities available-for-sale (1) Net securities losses (gains) reclassified into earnings $ 4 $ — $ (38 ) $ — Net securities gains (Non-interest income) Related income tax (benefit) expense (1 ) — 8 — Provision for income taxes Net effect on accumulated other comprehensive income for the period 3 — (30 ) — Debt securities held-to-maturity (1) Amortization of unrealized gain transferred from available-for-sale (94 ) (66 ) (149 ) (131 ) Interest and dividends on securities (Interest and dividend income) Related income tax expense 21 15 38 31 Provision for income taxes Net effect on accumulated other comprehensive income for the period (73 ) (51 ) (111 ) (100 ) Defined benefit plans (2) Amortization of net loss and prior service costs 758 764 1,509 1,520 Employee benefits (Non-interest expense) Related income tax benefit (173 ) (175 ) (380 ) (494 ) Provision for income taxes Net effect on accumulated other comprehensive income for the period 585 589 1,129 1,026 Total reclassifications for the period $ 515 $ 538 $ 988 $ 926 (1) (2)

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	6 Months Ended
	Jun. 30, 2019
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) 2019 2018 Lines of credit $ 1,909,282 $ 1,894,030 Loans approved but not closed 299,081 258,778 Overdraft limits 152,207 153,572 Letters of credit 45,960 42,841 Contingent obligations and other guarantees 48,654 61,509

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2019
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, 2019 Interest and dividend income $ 119,543 $ — $ 119,543 Interest expense 21,083 — 21,083 Net interest income 98,460 — 98,460 Provision for credit losses 2,747 — 2,747 Net interest income after provision for credit losses 95,713 — 95,713 Non-interest income 24,817 6,339 31,156 Non-interest expense 67,957 3,995 71,952 Income before provision for income taxes 52,573 2,344 54,917 Provision for income taxes 9,611 492 10,103 Net income $ 42,962 $ 1,852 $ 44,814 For The Three Months Ended June 30, 2018 Interest and dividend income $ 98,888 $ — $ 98,888 Interest expense 16,541 — 16,541 Net interest income 82,347 — 82,347 Provision for credit losses 1,708 — 1,708 Net interest income after provision for credit losses 80,639 — 80,639 Non-interest income 17,656 5,752 23,408 Non-interest expense 60,026 3,517 63,543 Income before provision for income taxes 38,269 2,235 40,504 Provision for income taxes 6,865 470 7,335 Net income $ 31,404 $ 1,765 $ 33,169 For the Six Months Ended June 30, 2019 Interest and dividend income $ 238,596 $ — $ 238,596 Interest expense 41,774 — 41,774 Net interest income 196,822 — 196,822 Provision for credit losses 5,254 — 5,254 Net interest income after provision for credit losses 191,568 — 191,568 Non-interest income 45,475 13,454 58,929 Non-interest expense 138,233 8,152 146,385 Income before provision for income taxes 98,810 5,302 104,112 Provision for income taxes 17,848 1,113 18,961 Net income $ 80,962 $ 4,189 $ 85,151 For the Six Months Ended June 30, 2018 Interest and dividend income $ 185,203 $ — $ 185,203 Interest expense 29,667 — 29,667 Net interest income 155,536 — 155,536 Provision for credit losses 3,876 — 3,876 Net interest income after provision for credit losses 151,660 — 151,660 Non-interest income 35,236 12,255 47,491 Non-interest expense 110,920 7,194 118,114 Income before provision for income taxes 75,976 5,061 81,037 Provision for income taxes 13,276 1,063 14,339 Net income $ 62,700 $ 3,998 $ 66,698

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019
Summary Of Significant Accounting Policies [Line Items]
Capitalized right of use asset and lease liabilities to be regcognize upon adoption of ASU	$ 20
Municipal Debt Securities [Member] | Accounting Standards Update 2017-12 [Member]
Summary Of Significant Accounting Policies [Line Items]
Reclassification of callable held-to-maturity securities		$ 67.3

Mergers and Acquisitions - Addi

Mergers and Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Aug. 20, 2018	Jun. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Total Assets		$ 12,494,653	$ 12,458,632
Portfolio loans, net of unearned income		7,737,854	$ 7,656,281
Farmers Capital Bank Corporation [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,600,000
Portfolio loans, net of unearned income	1,000,000
Securities	239,321
Value of acquisition	$ 428,901
Closing stock price	$ 49.40
Number of shares issued for acquisition	7,920,387
Cash consideration for outstanding FFKT shares	$ 37,634
Goodwill acquired	220,897
Purchase price allocation in core deposit intangible	39,992
Merger related expense		$ 3,200
Community Banking [Member]
Business Acquisition [Line Items]
Purchase price allocation in core deposit intangible	37,400
Trust And Investment Services [Member] | Customer Relationships [Member] | Farmers Capital Bank Corporation [Member]
Business Acquisition [Line Items]
Purchase price allocation in core deposit intangible	$ 2,600

Mergers and Acquisitions - Summ

Mergers and Acquisitions - Summary of Purchase Price of Acquisition and Resulting Goodwill (Detail) - Farmers Capital Bank Corporation [Member] $ in Thousands	Aug. 20, 2018USD ($)
Purchase price:
Fair value of WesBanco shares issued	$ 391,267
Cash consideration for outstanding FFKT shares	37,634
Total purchase price	428,901
Fair value of:
Tangible assets acquired	1,369,536
Core deposit and other intangible assets acquired	39,992
Liabilities assumed	(1,431,663)
Net cash received in the acquisition	230,139
Fair value of net assets acquired	208,004
Goodwill recognized	$ 220,897

Mergers and Acquisitions - Allo

Mergers and Acquisitions - Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail) - Farmers Capital Bank Corporation [Member] - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Aug. 20, 2018
Business Acquisition [Line Items]
Cash and due from banks		$ 230,139
Securities		239,321
Loans		1,025,800
Goodwill and other intangible assets		260,889
Accrued income and other assets		104,415
Total assets acquired		1,860,564
Liabilities assumed
Deposits		1,330,328
Borrowings		71,780
Accrued expenses and other liabilities		29,555
Total liabilities assumed		1,431,663
Fair value of net assets acquired		208,004
Net assets acquired		$ 428,901
Purchase Price Allocation Adjustment [Member]
Business Acquisition [Line Items]
Goodwill	$ 219,418
Other real estate owned	(80)
Accrued income and other assets	430
Liabilities assumed
Accrued expenses and other liabilities	(1,829)
Fair value of net assets acquired	(1,479)
Increase in goodwill recognized	1,479
Goodwill recognized	$ 220,897

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator for both basic and diluted earnings per common share:
Net income	$ 44,814	$ 33,169	$ 85,151	$ 66,698
Denominator:
Total average basic common shares outstanding	54,628,029	46,498,305	54,613,346	45,281,264
Effect of dilutive stock options and other stock compensation	105,492	141,475	110,863	135,746
Total diluted average common shares outstanding	54,733,521	46,639,780	54,724,209	45,417,010
Earnings per common share - basic	$ 0.82	$ 0.71	$ 1.56	$ 1.47
Earnings per common share - diluted	$ 0.82	$ 0.71	$ 1.56	$ 1.47

Earnings Per Common Share - Add

Earnings Per Common Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]
Shares contingently issuable under shareholder return plan			40,608	42,912
Stock Option [Member]
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]
Securities excluded from computation of net income per diluted shares	353,829	117,600	117,600	117,600
Restricted Stock [Member]
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]
Shares contingently issuable under shareholder return plan			30,137	17,081

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	Jun. 30, 2019	Dec. 31, 2018
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	$ 2,104,106	$ 2,142,056
Available-for-sale, Gross Unrealized Gains	31,042	5,861
Available-for-sale, Gross Unrealized Losses	(5,864)	(33,788)
Available-for-sale, Estimated Fair Value	2,129,284	2,114,129
Held-to-maturity, Amortized Cost	900,605	1,020,934
Held-to-maturity, Gross Unrealized Gains	21,891	8,993
Held-to-maturity, Gross Unrealized Losses	(962)	(9,184)
Held-to-maturity securities, Fair value	921,534	1,020,743
Total securities, Amortized Cost	3,004,711	3,162,990
Total securities, Gross Unrealized Gains	52,933	14,854
Total securities, Gross Unrealized Losses	(6,826)	(42,972)
Total securities, Estimated Fair Value	3,050,818	3,134,872
US Treasury Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	29,705	19,882
Available-for-sale, Gross Unrealized Gains	76	3
Available-for-sale, Gross Unrealized Losses		(7)
Available-for-sale, Estimated Fair Value	29,781	19,878
U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	130,578	142,852
Available-for-sale, Gross Unrealized Gains	4,147	556
Available-for-sale, Gross Unrealized Losses	(138)	(1,756)
Available-for-sale, Estimated Fair Value	134,587	141,652
Held-to-maturity, Amortized Cost	10,020	10,823
Held-to-maturity, Gross Unrealized Gains	36	6
Held-to-maturity, Gross Unrealized Losses	(104)	(329)
Held-to-maturity securities, Fair value	9,952	10,500
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	1,550,885	1,585,864
Available-for-sale, Gross Unrealized Gains	17,598	2,912
Available-for-sale, Gross Unrealized Losses	(5,441)	(27,521)
Available-for-sale, Estimated Fair Value	1,563,042	1,561,255
Held-to-maturity, Amortized Cost	136,929	148,300
Held-to-maturity, Gross Unrealized Gains	834	204
Held-to-maturity, Gross Unrealized Losses	(642)	(4,170)
Held-to-maturity securities, Fair value	137,121	144,334
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	175,355	171,671
Available-for-sale, Gross Unrealized Gains	3,417	264
Available-for-sale, Gross Unrealized Losses	(116)	(2,963)
Available-for-sale, Estimated Fair Value	178,656	168,972
Obligations of State and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	177,888	184,057
Available-for-sale, Gross Unrealized Gains	5,305	2,039
Available-for-sale, Gross Unrealized Losses	(15)	(982)
Available-for-sale, Estimated Fair Value	183,178	185,114
Held-to-maturity, Amortized Cost	720,399	828,520
Held-to-maturity, Gross Unrealized Gains	19,566	8,771
Held-to-maturity, Gross Unrealized Losses	(216)	(4,012)
Held-to-maturity securities, Fair value	739,749	833,279
Corporate Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	39,695	37,730
Available-for-sale, Gross Unrealized Gains	499	87
Available-for-sale, Gross Unrealized Losses	(154)	(559)
Available-for-sale, Estimated Fair Value	40,040	37,258
Held-to-maturity, Amortized Cost	33,257	33,291
Held-to-maturity, Gross Unrealized Gains	1,455	12
Held-to-maturity, Gross Unrealized Losses		(673)
Held-to-maturity securities, Fair value	$ 34,712	$ 32,630

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)Holding	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)Holding
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Maximum percentage of equity of one issuer	10.00%
Number of holdings greater than specified percentage of equity | Holding	0		0
Equities securities	$ 11,817		$ 11,737
Securities with aggregate fair values	2,000,000		2,000,000
Proceeds from sale of available-for-sale securities	66,095	$ 81,521
Net unrealized gains (losses) on available-for-sale securities included in AOCI	19,400		(21,500)
Federal home loan bank stock, Total	54,700		$ 50,800
Grantor Trusts [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Equities securities	$ 8,700

Securities - Schedule of Fair_2

Securities - Schedule of Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	$ 39,014
Total available-for-sale securities, One to Five Years	91,686
Total available-for-sale securities, Five to Ten Years	102,340
Total available-for-sale securities, After Ten Years	54,340
Total available-for-sale securities, Mortgage-backed and Equity	1,841,904
Available-for-sale, Estimated Fair Value	2,129,284	$ 2,114,129
Total held-to-maturity securities, One Year or less	15,652
Total held-to-maturity securities, One to Five Years	126,637
Total held-to-maturity securities, Five to Ten Years	358,156
Total held-to-maturity securities, After Ten Years	274,016
Total held-to-maturity securities, Mortgage-backed and Equity	147,073
Held-to-maturity securities, Fair value	921,534	1,020,743
Total, One Year or less	54,666
Total, One to Five Years	218,323
Total, Five to Ten Years	460,496
Total, After Ten Years, Fair value	328,356
Total, Mortgage- backed and Equity	1,988,977
Total, Fair value	3,050,818	3,134,872
US Treasury Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	29,781
Available-for-sale, Estimated Fair Value	29,781	19,878
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 Year or less	498
Total available-for-sale securities, One to Five Years	6,048
Total available-for-sale securities, Five to Ten Years	18,472
Total available-for-sale securities, After Ten Years	9,363
Total available-for-sale securities, Mortgage-backed and Equity	100,206
Available-for-sale, Estimated Fair Value	134,587	141,652
Total held-to-maturity securities, Mortgage-backed and Equity	9,952
Held-to-maturity securities, Fair value	9,952	10,500
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	1,563,042
Available-for-sale, Estimated Fair Value	1,563,042	1,561,255
Total held-to-maturity securities, Mortgage-backed and Equity	137,121
Held-to-maturity securities, Fair value	137,121	144,334
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	178,656
Available-for-sale, Estimated Fair Value	178,656	168,972
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	8,108
Total available-for-sale securities, One to Five Years	53,422
Total available-for-sale securities, Five to Ten Years	76,671
Total available-for-sale securities, After Ten Years	44,977
Available-for-sale, Estimated Fair Value	183,178	185,114
Total held-to-maturity securities, One Year or less	15,652
Total held-to-maturity securities, One to Five Years	115,724
Total held-to-maturity securities, Five to Ten Years	334,357
Total held-to-maturity securities, After Ten Years	274,016
Held-to-maturity securities, Fair value	739,749	833,279
Corporate Debt Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	627
Total available-for-sale securities, One to Five Years	32,216
Total available-for-sale securities, Five to Ten Years	7,197
Available-for-sale, Estimated Fair Value	40,040	37,258
Total held-to-maturity securities, One to Five Years	10,913
Total held-to-maturity securities, Five to Ten Years	23,799
Held-to-maturity securities, Fair value	$ 34,712	$ 32,630

Securities - Schedule of Fair_3

Securities - Schedule of Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Amortized Cost And Fair Value Debt Securities [Abstract]
Held-to-maturity, Amortized Cost	$ 900,605	$ 1,020,934

Securities - Schedule of Gross

Securities - Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities as well as Gains and Losses on Equity Securities as well as Result of the Adoption of the ASU 2016-01 (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Available-for-Sale Securities, Gross Unrealized Gain (Loss) [Line Items]
Net securities gains	$ 2,909	$ 358	$ 3,566	$ 319
Debt Securities [Member]
Available-for-Sale Securities, Gross Unrealized Gain (Loss) [Line Items]
Gross realized gains	106	5	348	12
Gross realized losses	(18)		(209)	(18)
Net gains (losses) on debt securities	88	5	139	(6)
Equity Securities [Member]
Available-for-Sale Securities, Gross Unrealized Gain (Loss) [Line Items]
Net unrealized gains recognized on securities still held	265	347	868	319
Net realized gains recognized on securities sold	2,556	6	2,559	6
Net gains on equity securities	$ 2,821	$ 353	$ 3,427	$ 325

Securities - Schedule of Unreal

Securities - Schedule of Unrealized Losses on Investment Securities (Detail) $ in Thousands	Jun. 30, 2019USD ($)Security	Dec. 31, 2018USD ($)Security
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 42,613	$ 466,878
Less than 12 months, Unrealized Losses	$ (233)	$ (3,372)
Less than 12 months, Number of Securities | Security	13	284
12 months or more, Fair Value	$ 660,179	$ 1,425,284
12 months or more, Unrealized Losses	$ (6,593)	$ (39,600)
12 months or more, Number of Securities | Security	307	837
Fair Value, Total	$ 702,792	$ 1,892,162
Unrealized Losses, Total	$ (6,826)	$ (42,972)
Number of Securities Total | Security	320	1,121
US Treasury Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value		$ 9,972
Less than 12 months, Unrealized Losses		$ (7)
Less than 12 months, Number of Securities | Security		1
Fair Value, Total		$ 9,972
Unrealized Losses, Total		$ (7)
Number of Securities Total | Security		1
U.S. Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value		$ 18,926
Less than 12 months, Unrealized Losses		$ (148)
Less than 12 months, Number of Securities | Security		8
12 months or more, Fair Value	$ 28,542	$ 76,385
12 months or more, Unrealized Losses	$ (242)	$ (1,937)
12 months or more, Number of Securities | Security	7	14
Fair Value, Total	$ 28,542	$ 95,311
Unrealized Losses, Total	$ (242)	$ (2,085)
Number of Securities Total | Security	7	22
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	$ 30,301	$ 285,534
Less than 12 months, Unrealized Losses	$ (95)	$ (1,862)
Less than 12 months, Number of Securities | Security	4	44
12 months or more, Fair Value	$ 564,036	$ 922,698
12 months or more, Unrealized Losses	$ (5,988)	$ (29,829)
12 months or more, Number of Securities | Security	211	291
Fair Value, Total	$ 594,337	$ 1,208,232
Unrealized Losses, Total	$ (6,083)	$ (31,691)
Number of Securities Total | Security	215	335
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	$ 3,783	$ 9,186
Less than 12 months, Unrealized Losses	$ (26)	$ (18)
Less than 12 months, Number of Securities | Security	4	6
12 months or more, Fair Value	$ 26,655	$ 111,068
12 months or more, Unrealized Losses	$ (90)	$ (2,945)
12 months or more, Number of Securities | Security	12	14
Fair Value, Total	$ 30,438	$ 120,254
Unrealized Losses, Total	$ (116)	$ (2,963)
Number of Securities Total | Security	16	20
Obligations of State and Political Subdivisions [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 609	$ 104,469
Less than 12 months, Unrealized Losses	$ (1)	$ (439)
Less than 12 months, Number of Securities | Security	2	207
12 months or more, Fair Value	$ 38,999	$ 303,681
12 months or more, Unrealized Losses	$ (230)	$ (4,555)
12 months or more, Number of Securities | Security	76	513
Fair Value, Total	$ 39,608	$ 408,150
Unrealized Losses, Total	$ (231)	$ (4,994)
Number of Securities Total | Security	78	720
Corporate Debt Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 7,920	$ 38,791
Less than 12 months, Unrealized Losses	$ (111)	$ (898)
Less than 12 months, Number of Securities | Security	3	18
12 months or more, Fair Value	$ 1,947	$ 11,452
12 months or more, Unrealized Losses	$ (43)	$ (334)
12 months or more, Number of Securities | Security	1	5
Fair Value, Total	$ 9,867	$ 50,243
Unrealized Losses, Total	$ (154)	$ (1,232)
Number of Securities Total | Security	4	23

Loans and the Allowance for C_3

Loans and the Allowance for Credit Losses - Additional Information (Detail)	Aug. 20, 2018USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2019USD ($)Contract	Dec. 31, 2018USD ($)Contract
Financing Receivable, Recorded Investment [Line Items]
Net Deferred loan (costs) and fees		$ 3,200,000	$ 4,200,000	$ 3,200,000
Unamortized discount on purchased loans from acquisitions		49,300,000	40,100,000	49,300,000
Aggregate amount of residential real estate, home equity and consumer loans classified as substandard		22,900,000	20,000,000	22,900,000
Internally assigned loan grades to residential real estate, home equity and consumer loans		3,900,000	2,000,000	3,900,000
Loans acquired with deteriorated credit quality		9,741,000	$ 10,632,000	$ 9,741,000
Number of restructured contracts greater than $0 million | Contract			0	0
Threshold for TDR		1,000,000	$ 1,000,000	$ 1,000,000
Accruing and non accrual TDR permitted interest-only payment period			3 months
Unfunded commitments to debtors for impaired loans		100,000	$ 200,000	100,000
Other real estate owned		7,173,000	4,891,000	7,173,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans acquired with deteriorated credit quality		2,430,000	1,644,000	2,430,000
Other real estate owned		1,300,000	1,200,000	1,300,000
Foreclosure proceedings in process on residential real estate loans		6,000,000	5,800,000	6,000,000
Cost Recovery Method [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans acquired with deteriorated credit quality, fair value	$ 2,400,000
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans acquired with deteriorated credit quality		900,000	857,000	$ 900,000
Commercial and Industrial [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Annual sales of borrowers			100,000,000
Farmers Capital Bank Corporation [Member]
Financing Receivable, Recorded Investment [Line Items]
Unamortized discount on purchased loans from acquisitions			19,000,000
Portfolio loans, net of unearned income	1,064,800,000
Fair value of acquired loans	1,025,800,000
Fair market value adjustment of acquired loans	988,300,000
Fair market value adjustment of acquired loans	26,000,000
Loans acquired with deteriorated credit quality	5,300,000		3,100,000
Loans acquired with deteriorated credit quality, fair value	$ 4,600,000
Loans acquired with deteriorated credit quality outstanding customer balance			3,600,000
Acquired impaired loans allowances for loan losses			$ 0
Acquired loans, sold book value		45,200,000
Acquired loans, sold		$ 32,900,000

Loans and the Allowance for C_4

Loans and the Allowance for Credit Losses - Schedule of Recorded Investment in Loans by Category (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 7,737,854	$ 7,656,281
Loans held for sale	18,649	8,994
Total loans	7,756,503	7,665,275
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	483,046	528,072
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	3,394,587	3,325,623
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	1,300,577	1,265,460
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	3,877,633	3,853,695
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	1,633,613	1,611,607
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	335,728	326,188
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 590,303	$ 599,331

Loans and the Allowance for C_5

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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			$ 48,948	$ 45,284
Allowance for loan commitments, beginning balance			741	574
Total beginning allowance for credit losses			49,689	45,858
Provision for loan losses			4,229	3,843
Provision for loan commitments			1,025	33
Total provision for credit losses	$ 2,747	$ 1,708	5,254	3,876
Charge-offs			(4,866)	(4,959)
Recoveries			2,548	3,470
Net charge-offs			(2,318)	(1,489)
Allowance for loan losses, ending balance	50,859	47,638	50,859	47,638
Allowance for loan commitments, ending balance	1,766	607	1,766	607
Total ending allowance for credit losses	52,625	48,245	52,625	48,245
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			4,039	3,117
Allowance for loan commitments, beginning balance			169	119
Total beginning allowance for credit losses			4,208	3,236
Provision for loan losses			(538)	1,465
Provision for loan commitments			18	44
Total provision for credit losses			(520)	1,509
Charge-offs				(136)
Recoveries			200	264
Net charge-offs			200	128
Allowance for loan losses, ending balance	3,701	4,710	3,701	4,710
Allowance for loan commitments, ending balance	187	163	187	163
Total ending allowance for credit losses	3,888	4,873	3,888	4,873
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			20,848	21,166
Allowance for loan commitments, beginning balance			33	26
Total beginning allowance for credit losses			20,881	21,192
Provision for loan losses			1,459	(1,774)
Provision for loan commitments			(9)	(8)
Total provision for credit losses			1,450	(1,782)
Charge-offs			(285)	(692)
Recoveries			345	776
Net charge-offs			60	84
Allowance for loan losses, ending balance	22,367	19,476	22,367	19,476
Allowance for loan commitments, ending balance	24	18	24	18
Total ending allowance for credit losses	22,391	19,494	22,391	19,494
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			12,114	9,414
Allowance for loan commitments, beginning balance			262	173
Total beginning allowance for credit losses			12,376	9,587
Provision for loan losses			1,309	2,100
Provision for loan commitments			995	2
Total provision for credit losses			2,304	2,102
Charge-offs			(1,025)	(616)
Recoveries			489	636
Net charge-offs			(536)	20
Allowance for loan losses, ending balance	12,887	11,534	12,887	11,534
Allowance for loan commitments, ending balance	1,257	175	1,257	175
Total ending allowance for credit losses	14,144	11,709	14,144	11,709
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			972	821
Total beginning allowance for credit losses			972	821
Provision for loan losses			1,119	439
Total provision for credit losses			1,119	439
Charge-offs			(860)	(541)
Recoveries			215	197
Net charge-offs			(645)	(344)
Allowance for loan losses, ending balance	1,446	916	1,446	916
Total ending allowance for credit losses	1,446	916	1,446	916
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			3,822	3,206
Allowance for loan commitments, beginning balance			12	7
Total beginning allowance for credit losses			3,834	3,213
Provision for loan losses			124	944
Provision for loan commitments			1	2
Total provision for credit losses			125	946
Charge-offs			(679)	(509)
Recoveries			188	252
Net charge-offs			(491)	(257)
Allowance for loan losses, ending balance	3,455	3,893	3,455	3,893
Allowance for loan commitments, ending balance	13	9	13	9
Total ending allowance for credit losses	3,468	3,902	3,468	3,902
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			2,797	3,063
Allowance for loan commitments, beginning balance			39	37
Total beginning allowance for credit losses			2,836	3,100
Provision for loan losses			333	615
Provision for loan commitments			(3)
Total provision for credit losses			330	615
Charge-offs			(1,344)	(1,793)
Recoveries			896	1,066
Net charge-offs			(448)	(727)
Allowance for loan losses, ending balance	2,682	2,951	2,682	2,951
Allowance for loan commitments, ending balance	36	37	36	37
Total ending allowance for credit losses	2,718	2,988	2,718	2,988
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance			4,356	4,497
Allowance for loan commitments, beginning balance			226	212
Total beginning allowance for credit losses			4,582	4,709
Provision for loan losses			423	54
Provision for loan commitments			23	(7)
Total provision for credit losses			446	47
Charge-offs			(673)	(672)
Recoveries			215	279
Net charge-offs			(458)	(393)
Allowance for loan losses, ending balance	4,321	4,158	4,321	4,158
Allowance for loan commitments, ending balance	249	205	249	205
Total ending allowance for credit losses	$ 4,570	$ 4,363	$ 4,570	$ 4,363

Loans and the Allowance for C_6

Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	$ 1,511
Allowance for loans collectively evaluated for impairment	49,348	$ 48,948
Allowance for loan commitments	1,766	741	$ 607	$ 574
Total allowance for credit losses	52,625	49,689	48,245	45,858
Individually evaluated for impairment	11,267
Collectively evaluated for impairment	7,715,955	7,646,540
Acquired with deteriorated credit quality	10,632	9,741
Total loans	7,737,854	7,656,281
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	3,701	4,039
Allowance for loan commitments	187	169	163	119
Total allowance for credit losses	3,888	4,208	4,873	3,236
Collectively evaluated for impairment	482,804	527,737
Acquired with deteriorated credit quality	242	335
Total loans	483,046	528,072
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	1,479
Allowance for loans collectively evaluated for impairment	20,888	20,848
Allowance for loan commitments	24	33	18	26
Total allowance for credit losses	22,391	20,881	19,494	21,192
Individually evaluated for impairment	5,157
Collectively evaluated for impairment	3,381,541	3,319,672
Acquired with deteriorated credit quality	7,889	5,951
Total loans	3,394,587	3,325,623
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	11
Allowance for loans collectively evaluated for impairment	12,876	12,114
Allowance for loan commitments	1,257	262	175	173
Total allowance for credit losses	14,144	12,376	11,709	9,587
Individually evaluated for impairment	192
Collectively evaluated for impairment	1,299,528	1,264,560
Acquired with deteriorated credit quality	857	900
Total loans	1,300,577	1,265,460
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	1,446	972
Total allowance for credit losses	1,446	972	916	821
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	12
Allowance for loans collectively evaluated for impairment	3,443	3,822
Allowance for loan commitments	13	12	9	7
Total allowance for credit losses	3,468	3,834	3,902	3,213
Individually evaluated for impairment	4,922
Collectively evaluated for impairment	1,627,047	1,609,177
Acquired with deteriorated credit quality	1,644	2,430
Total loans	1,633,613	1,611,607
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	1
Allowance for loans collectively evaluated for impairment	2,681	2,797
Allowance for loan commitments	36	39	37	37
Total allowance for credit losses	2,718	2,836	2,988	3,100
Individually evaluated for impairment	74
Collectively evaluated for impairment	335,654	326,063
Acquired with deteriorated credit quality		125
Total loans	335,728	326,188
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	8
Allowance for loans collectively evaluated for impairment	4,313	4,356
Allowance for loan commitments	249	226	205	212
Total allowance for credit losses	4,570	4,582	$ 4,363	$ 4,709
Individually evaluated for impairment	922
Collectively evaluated for impairment	589,381	599,331
Total loans	$ 590,303	$ 599,331

Loans and the Allowance for C_7

Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Parenthetical) (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Troubled debt restructuring threshold	$ 1	$ 1

Loans and the Allowance for C_8

Loans and the Allowance for Credit Losses - Summary of Commercial Loans by Risk Grade (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Summary of commercial loans by risk grade
Commercial loans	$ 7,686,995	$ 7,607,333
Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	5,063,970	5,036,201
Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	73,236	51,710
Classified - substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	41,004	31,244
Commercial Real Estate - Land and Construction [Member]
Summary of commercial loans by risk grade
Commercial loans	483,046	528,072
Commercial Real Estate - Land and Construction [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	476,109	523,707
Commercial Real Estate - Land and Construction [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	5,794	2,297
Commercial Real Estate - Land and Construction [Member] | Classified - substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	1,143	2,068
Commercial Real Estate - Improved Property [Member]
Summary of commercial loans by risk grade
Commercial loans	3,394,587	3,325,623
Commercial Real Estate - Improved Property [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	3,319,270	3,267,304
Commercial Real Estate - Improved Property [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	52,657	35,566
Commercial Real Estate - Improved Property [Member] | Classified - substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	22,660	22,753
Commercial and Industrial [Member]
Summary of commercial loans by risk grade
Commercial loans	1,300,577	1,265,460
Commercial and Industrial [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	1,268,591	1,245,190
Commercial and Industrial [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	14,785	13,847
Commercial and Industrial [Member] | Classified - substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	17,201	6,423
Commercial Portfolio Segment [Member]
Summary of commercial loans by risk grade
Commercial loans	$ 5,178,210	$ 5,119,155

Loans and the Allowance for C_9

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, 2019	Jun. 30, 2018
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period [Abstract]
Balance at beginning of period	$ 6,203	$ 1,724
Acquisitions	1,300
Reduction due to change in projected cash flows	(960)	(86)
Reclass from non-accretable difference	839	5,877
Accretion	(2,240)	(440)
Balance at end of period	$ 5,142	$ 7,075

Loans and the Allowance for _10

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Current	$ 7,695,972	$ 7,610,687
Total Past Due	41,882	45,594
Total loans	7,737,854	7,656,281
90 Days or More Past Due and Accruing	2,634	4,077
Loans held for sale, current	18,649	8,994
Loans held for sale	18,649	8,994
Total loans, current	7,714,621	7,619,681
Total loans	7,756,503	7,665,275
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	584,058	591,623
Total Past Due	6,245	7,708
Total loans	590,303	599,331
90 Days or More Past Due and Accruing	533	705
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	3,864,327	3,841,425
Total Past Due	13,306	12,270
Total loans	3,877,633	3,853,695
90 Days or More Past Due and Accruing	587	175
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	1,617,430	1,593,519
Total Past Due	16,183	18,088
Total loans	1,633,613	1,611,607
90 Days or More Past Due and Accruing	1,173	2,820
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	333,279	322,584
Total Past Due	2,449	3,604
Total loans	335,728	326,188
90 Days or More Past Due and Accruing	244	364
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	482,016	526,660
Total Past Due	1,030	1,412
Total loans	483,046	528,072
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	3,382,311	3,314,765
Total Past Due	12,276	10,858
Total loans	3,394,587	3,325,623
90 Days or More Past Due and Accruing	587	175
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	1,296,878	1,261,536
Total Past Due	3,699	3,924
Total loans	1,300,577	1,265,460
90 Days or More Past Due and Accruing	97	13
Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	9,310	8,910
Total Past Due	23,588	21,790
Total loans	32,898	30,700
TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	5,273	5,586
Total Past Due	214	158
Total loans	5,487	5,744
Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	14,583	14,496
Total Past Due	23,802	21,948
Total loans	38,385	36,444
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	13,901	9,952
30-59 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,073	2,500
30-59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,262	2,328
30-59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	5,962	2,717
30-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,682	2,084
30-59 Days Past Due [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	965	62
30-59 Days Past Due [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,297	2,266
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	922	323
30-59 Days Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,170	337
30-59 Days Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	10	59
30-59 Days Past Due [Member] | Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,180	396
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	5,040	11,475
60-89 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	412	1,273
60-89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,531	3,600
60-89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,449	5,001
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	506	1,007
60-89 Days Past Due [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	45	1,350
60-89 Days Past Due [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,486	2,250
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	142	594
60-89 Days Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,169	1,370
60-89 Days Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	146	92
60-89 Days Past Due [Member] | Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,315	1,462
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	22,941	24,167
90 Days or More Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,760	3,935
90 Days or More Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	8,513	6,342
90 Days or More Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	7,772	10,370
90 Days or More Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	261	513
90 Days or More Past Due [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	20
90 Days or More Past Due [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	8,493	6,342
90 Days or More Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,635	3,007
90 Days or More Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	20,249	20,083
90 Days or More Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	58	7
90 Days or More Past Due [Member] | Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	$ 20,307	$ 20,090

Loans and the Allowance for _11

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Past due loans excluded TDRs past due and accruing	90 days

Loans and the Allowance for _12

Loans and the Allowance for Credit Losses - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	$ 37,167		$ 37,167		$ 45,688
Recorded Investment, With no specific allowance recorded	27,118		27,118		36,444
Unpaid Principal Balance, With a specific allowance recorded	11,866		11,866
Recorded Investment, With a specific allowance recorded	11,267		11,267
Related Allowance, With a specific allowance recorded	1,511		1,511
Total impaired loans, Unpaid principal balance	49,033		49,033		45,688
Total impaired loans, Recorded investment	38,385		38,385		36,444
Total impaired loans, Related Allowance	1,511		1,511
Average recorded investment, with no related specific allowance	27,207	$ 38,130	30,284	$ 39,066
Interest income recognized, With no related specific allowance		94		515
Average recorded investment, With a specific allowance recorded	9,843	1,052	6,561	1,403
Interest income recognized, With a specific allowance recorded	86		170
Total impaired loans, Average recorded investment	37,050	39,182	36,845	40,469
Total impaired loans, Interest income recognized	86	94	170	515
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	13,572		13,572		20,270
Recorded Investment, With no specific allowance recorded	11,896		11,896		18,016
Unpaid Principal Balance, With a specific allowance recorded	5,358		5,358
Recorded Investment, With a specific allowance recorded	4,922		4,922
Related Allowance, With a specific allowance recorded	12		12
Average recorded investment, with no related specific allowance	11,845	18,264	13,902	18,434
Interest income recognized, With no related specific allowance		61		127
Average recorded investment, With a specific allowance recorded	5,000		3,333
Interest income recognized, With a specific allowance recorded	60		118
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	416		416		846
Recorded Investment, With no specific allowance recorded	311		311		671
Unpaid Principal Balance, With a specific allowance recorded	113		113
Recorded Investment, With a specific allowance recorded	74		74
Related Allowance, With a specific allowance recorded	1		1
Average recorded investment, with no related specific allowance	337	758	448	823
Interest income recognized, With no related specific allowance		2		5
Average recorded investment, With a specific allowance recorded	89		59
Interest income recognized, With a specific allowance recorded	1		2
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	5,247		5,247		5,924
Recorded Investment, With no specific allowance recorded	4,450		4,450		5,036
Unpaid Principal Balance, With a specific allowance recorded	990		990
Recorded Investment, With a specific allowance recorded	922		922
Related Allowance, With a specific allowance recorded	8		8
Average recorded investment, with no related specific allowance	4,487	5,068	4,670	5,098
Interest income recognized, With no related specific allowance		6		11
Average recorded investment, With a specific allowance recorded	859		573
Interest income recognized, With a specific allowance recorded	7		15
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	347		347
Recorded Investment, With no specific allowance recorded	295		295
Average recorded investment, with no related specific allowance	290	400	193	346
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	13,499		13,499		14,038
Recorded Investment, With no specific allowance recorded	7,312		7,312		9,293
Unpaid Principal Balance, With a specific allowance recorded	5,211		5,211
Recorded Investment, With a specific allowance recorded	5,157		5,157
Related Allowance, With a specific allowance recorded	1,479		1,479
Average recorded investment, with no related specific allowance	7,287	10,604	7,955	11,357
Interest income recognized, With no related specific allowance		23		368
Average recorded investment, With a specific allowance recorded	3,645	1,052	2,430	1,403
Interest income recognized, With a specific allowance recorded	14		28
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	4,086		4,086		4,610
Recorded Investment, With no specific allowance recorded	2,854		2,854		$ 3,428
Unpaid Principal Balance, With a specific allowance recorded	194		194
Recorded Investment, With a specific allowance recorded	192		192
Related Allowance, With a specific allowance recorded	11		11
Average recorded investment, with no related specific allowance	2,961	3,036	3,116	3,008
Interest income recognized, With no related specific allowance		$ 2		$ 4
Average recorded investment, With a specific allowance recorded	250		166
Interest income recognized, With a specific allowance recorded	$ 4		$ 7

Loans and the Allowance for _13

Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Non-accrual loans	$ 32,898	$ 30,700
TDRs	7,411	8,599
Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	5,487	5,744
Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	1,924	2,855
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	295
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	11,726	8,413
TDRs	1,301	2,409
Commercial Real Estate - Improved Property [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	743	880
Commercial Real Estate - Improved Property [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	558	1,529
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	2,854	3,260
TDRs	192	337
Commercial and Industrial [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	192	168
Commercial and Industrial [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs		169
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	4,886	4,610
TDRs	922	624
Home Equity [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	486	426
Home Equity [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	436	198
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	12,021	8,413
TDRs	1,301	2,409
Commercial Real Estate [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	743	880
Commercial Real Estate [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	558	1,529
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	12,813	13,831
TDRs	4,922	5,106
Residential Real Estate [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	4,005	4,185
Residential Real Estate [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	917	921
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	324	586
TDRs	74	123
Consumer [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	61	85
Consumer [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	$ 13	$ 38

Loans and the Allowance for _14

Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Parenthetical) (Detail)	Jun. 30, 2019USD ($)Borrower	Dec. 31, 2018USD ($)Borrower
Receivables [Abstract]
Number of borrowers with loans greater than one million | Borrower	3	1
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	$ 8,200,000	$ 3,400,000

Loans and the Allowance for _15

Loans and the Allowance for Credit Losses - Loans Identified as TDRs (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)Contract	Jun. 30, 2018USD ($)Contract	Jun. 30, 2019USD ($)Contract	Jun. 30, 2018USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	2	4	9	11
Pre-Modification Outstanding Recorded Investment	$ 243	$ 68	$ 639	$ 278
Post-Modification Outstanding Recorded Investment	$ 196	$ 65	$ 581	$ 252
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1	1	1	1
Pre-Modification Outstanding Recorded Investment	$ 44	$ 9	$ 44	$ 10
Post-Modification Outstanding Recorded Investment	$ 40	$ 9	$ 40	$ 9
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract			4	5
Pre-Modification Outstanding Recorded Investment			$ 194	$ 203
Post-Modification Outstanding Recorded Investment			$ 188	$ 185
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract		2	1	4
Pre-Modification Outstanding Recorded Investment		$ 39	$ 15	$ 45
Post-Modification Outstanding Recorded Investment		$ 36	$ 13	$ 38
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1	1	3	1
Pre-Modification Outstanding Recorded Investment	$ 199	$ 20	$ 386	$ 20
Post-Modification Outstanding Recorded Investment	$ 156	$ 20	$ 340	$ 20

Loans and the Allowance for _16

Loans and the Allowance for Credit Losses - TDRs Defaulted Later Restructured (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)Default	Jun. 30, 2018USD ($)Default
Financing Receivable, Modifications [Line Items]
Number of Defaults | Default	2	3
Recorded Investment | $	$ 110	$ 273
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Default		1
Recorded Investment | $		$ 145
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Default		1
Recorded Investment | $		$ 145
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Default	1	1
Recorded Investment | $	$ 97	$ 121
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Default	1
Recorded Investment | $	$ 13
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Default		1
Recorded Investment | $		$ 7

Loans and the Allowance for _17

Loans and the Allowance for Credit Losses - Summary of Other Real Estate Owned and Repossessed Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Other real estate owned	$ 4,891	$ 7,173
Repossessed assets	82	92
Total other real estate owned and repossessed assets	$ 4,973	$ 7,265

Leases - Additional Information

Leases - Additional Information (Detail) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2019USD ($)
Weighted-average lease term	9 years	9 years
Operating lease ROU assets	$ 18,200	$ 18,200
Operating lease ROU liabilities	21,204	21,204
Operating lease, expense	$ 700	$ 1,300
Weighted average discount rate	3.29%	3.29%
Maximum [Member]
Operating lease terms	21 years	21 years
Operating lease term extensions	10 years	10 years
Minimum [Member]
Operating lease terms	1 year	1 year
Operating lease term extensions	5 years	5 years

Leases - Future Minimum Lease P

Leases - Future Minimum Lease Payments Under Non-cancellable Leases (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Leases [Abstract]
2020	$ 755
2021	2,444
2022	1,713
2023	2,227
2024 and thereafter	17,686
Total lease payments	24,825
Total lease payments	24,825
Less: Interest	(3,621)
Present value of lease liabilities	$ 21,204

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)Derivative	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)Derivative	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Aggregate notional amount	$ 320,100,000		$ 320,100,000		$ 229,800,000
Net gain (loss) on change in fair value	(1,366,000)	$ 40,000	(1,982,000)	$ 753,000
Collateral posted with market value on liability positions with credit risk-related contingent features	$ 21,300,000		$ 21,300,000
Interest Rate Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of interest rate swaps | Derivative	53		53		43
Net gain (loss) on change in fair value			$ (1,100,000)	200,000
Income (loss) on derivative instrument not designated hedges			$ 1,900,000	$ 500,000

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Summary of Fair Values of Derivative Instruments on Balance Sheets (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	$ 320,100,000	$ 229,800,000
Asset Derivatives	13,339,000	4,775,000
Liability Derivatives	14,940,000	5,315,000
Interest Rate Swaps [Member] | Loan Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	320,134,000	229,778,000
Asset Derivatives	13,281,000	4,650,000
Liability Derivatives	14,774,000	5,081,000
Interest Rate Loan Commitments [Member] | Other Contract [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	44,062,000	16,113,000
Asset Derivatives	58,000	125,000
Forward TBA Contracts [Member] | Other Contract [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	61,000,000	20,000,000
Liability Derivatives	$ 166,000	$ 234,000

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Summary of Effect of Derivative Instruments on Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	$ (1,366)	$ 40	$ (1,982)	$ 753
Interest Rate Swaps [Member] | Other Income [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	(751)	44	(1,063)	211
Interest Rate Loan Commitments [Member] | Mortgage Banking Income [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	(97)	7	(67)	143
Forward TBA Contracts [Member] | Mortgage Banking Income [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	$ (518)	$ (11)	$ (852)	$ 399

Pension & Postretirement Medi_3

Pension & Postretirement Medical Benefit Plans - Defined Benefit Pension Plan (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Net Periodic Benefit Cost [Abstract]
Service cost – benefits earned during year	$ 560	$ 707	$ 1,114	$ 1,406
Interest cost on projected benefit obligation	1,313	1,228	2,611	2,442
Expected return on plan assets	(2,211)	(2,390)	(4,398)	(4,753)
Amortization of prior service cost	6	7	13	13
Amortization of net loss	808	758	1,607	1,508
Net periodic pension cost	$ 476	$ 310	$ 947	$ 616

Pension & Postretirement Medi_4

Pension & Postretirement Medical Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum required pension plan contribution	$ 4,800		$ 4,800
Available credit balance	52,500		52,500
Expected voluntary contribution for the year 2019			3,000
Net periodic interest cost	1,313	$ 1,228	2,611	$ 2,442
Prior service cost	6	7	13	13
Net periodic cost post retirement medical benefit plan	476	$ 310	947	$ 616
Postemployment Retirement Benefits [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net periodic interest cost	115		228
Prior service cost	56		111
Net periodic cost post retirement medical benefit plan	$ 59		$ 117

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, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	$ 11,817	$ 11,737
Available-for-sale debt securities	2,129,284	2,114,129
Loans held for sale	18,649	8,994
Other real estate owned and repossessed assets	4,973	7,265
Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	11,817	11,737
Available-for-sale debt securities	2,129,284	2,114,129
Loans held for sale	18,649	8,994
Other assets - interest rate derivatives agreements	13,281	4,650
Total assets recurring fair value measurements	2,173,031	2,139,510
Other liabilities - interest rate derivatives agreements	14,774	5,081
Total liabilities recurring fair value measurements	14,774	5,081
Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans	2,434
Other real estate owned and repossessed assets	4,973	7,265
Total assets recurring fair value measurements	7,407	7,265
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	29,781	19,878
US Treasury Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	29,781	19,878
U.S. Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	134,587	141,652
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]
Available-for-sale debt securities	134,587	141,652
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]
Available-for-sale debt securities	1,563,042	1,561,255
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]
Available-for-sale debt securities	1,563,042	1,561,255
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]
Available-for-sale debt securities	178,656	168,972
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]
Available-for-sale debt securities	178,656	168,972
Obligations of State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	183,178	185,114
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]
Available-for-sale debt securities	183,178	185,114
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	40,040	37,258
Corporate Debt Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	40,040	37,258
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	11,817	11,737
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]
Equity securities	11,817	11,737
Total assets recurring fair value measurements	11,817	11,737
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	2,127,682	2,112,626
Loans held for sale	18,649	8,994
Other assets - interest rate derivatives agreements	13,281	4,650
Other liabilities - interest rate derivatives agreements	14,774	5,081
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]
Available-for-sale debt securities	2,127,682	2,112,626
Loans held for sale	18,649	8,994
Other assets - interest rate derivatives agreements	13,281	4,650
Total assets recurring fair value measurements	2,159,612	2,126,270
Other liabilities - interest rate derivatives agreements	14,774	5,081
Total liabilities recurring fair value measurements	14,774	5,081
Significant Other Observable Inputs (Level 2) [Member] | US Treasury Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	29,781	19,878
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]
Available-for-sale debt securities	134,587	141,652
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]
Available-for-sale debt securities	1,563,042	1,561,255
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]
Available-for-sale debt securities	178,656	168,972
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]
Available-for-sale debt securities	181,576	183,611
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]
Available-for-sale debt securities	40,040	37,258
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	1,602	1,503
Significant Unobservable Inputs (Level 3) [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	1,602	1,503
Total assets recurring fair value measurements	1,602	1,503
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	2,434
Other real estate owned and repossessed assets	4,973	7,265
Total assets recurring fair value measurements	7,407	7,265
Significant Unobservable Inputs (Level 3) [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]
Available-for-sale debt securities	$ 1,602	$ 1,503

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair value transfer amount	$ 0	$ 0	$ 0

Fair Value Measurement - Sche_2

Fair Value Measurement - Schedule of Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Fair Value Inputs Asset Quantitative Information [Line Items]
Other real estate owned and repossessed assets	$ 4,973	$ 7,265
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Impaired Loans	2,434
Other real estate owned and repossessed assets	4,973	7,265
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Impaired Loans	2,434
Other real estate owned and repossessed assets	$ 4,973	$ 7,265
Impaired loans, Appraisal adjustments	30.50%
Impaired Loans Liquidation Expenses	5.10%
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Weighted Average [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Impaired loans, Appraisal adjustments	30.50%
Impaired Loans Liquidation Expenses	5.10%

Fair Value Measurement - Estima

Fair Value Measurement - Estimates Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financial Assets
Cash and due from banks	$ 194,355	$ 169,186
Equity securities	11,817	11,737
Available-for-sale debt securities	2,129,284	2,114,129
Held-to-maturity debt securities	900,605	1,020,934
Net loans	7,686,995	7,607,333
Loans held for sale	18,649	8,994
Accrued interest receivable	38,450	38,853
Financial Liabilities
Deposits	8,694,928	8,831,633
Federal Home Loan Bank borrowings	1,121,283	1,054,174
Other borrowings	296,148	290,522
Subordinated debt and junior subordinated debt	156,534	189,842
Accrued interest payable	6,559	4,627
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial Assets
Cash and due from banks	194,355	169,186
Equity securities	11,817	11,737
Accrued interest receivable	38,450	38,853
Financial Liabilities
Deposits	7,329,812	7,376,023
Other borrowings	293,205	288,918
Accrued interest payable	6,559	4,627
Significant Other Observable Inputs (Level 2) [Member]
Financial Assets
Available-for-sale debt securities	2,127,682	2,112,626
Held-to-maturity debt securities	920,989	1,020,195
Loans held for sale	18,649	8,994
Other assets - interest rate derivatives	13,281	4,650
Financial Liabilities
Deposits	1,365,967	1,460,367
Federal Home Loan Bank borrowings	1,127,210	1,051,401
Other borrowings	3,369	1,936
Subordinated debt and junior subordinated debt	144,410	174,448
Other liabilities - interest rate derivatives	14,774	5,081
Significant Unobservable Inputs (Level 3) [Member]
Financial Assets
Available-for-sale debt securities	1,602	1,503
Held-to-maturity debt securities	545	548
Net loans	7,674,887	7,422,825
Carrying Amount [Member]
Financial Assets
Cash and due from banks	194,355	169,186
Equity securities	11,817	11,737
Available-for-sale debt securities	2,129,284	2,114,129
Held-to-maturity debt securities	900,605	1,020,934
Net loans	7,686,995	7,607,333
Loans held for sale	18,649	8,994
Other assets - interest rate derivatives	13,281	4,650
Accrued interest receivable	38,450	38,853
Financial Liabilities
Deposits	8,694,928	8,831,633
Federal Home Loan Bank borrowings	1,121,283	1,054,174
Other borrowings	296,148	290,522
Subordinated debt and junior subordinated debt	156,534	189,842
Other liabilities - interest rate derivatives	14,774	5,081
Accrued interest payable	6,559	4,627
Fair Value Estimate [Member]
Financial Assets
Cash and due from banks	194,355	169,186
Equity securities	11,817	11,737
Available-for-sale debt securities	2,129,284	2,114,129
Held-to-maturity debt securities	921,534	1,020,743
Net loans	7,674,887	7,422,825
Loans held for sale	18,649	8,994
Other assets - interest rate derivatives	13,281	4,650
Accrued interest receivable	38,450	38,853
Financial Liabilities
Deposits	8,695,779	8,836,390
Federal Home Loan Bank borrowings	1,127,210	1,051,401
Other borrowings	296,574	290,854
Subordinated debt and junior subordinated debt	144,410	174,448
Other liabilities - interest rate derivatives	14,774	5,081
Accrued interest payable	$ 6,559	$ 4,627

Revenue Recognition - Summary o

Revenue Recognition - Summary of Revenue Recognition (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule of Revenue Recognition [Line Items]
Total net securities brokerage revenue	$ 1,973	$ 1,809	$ 3,833	$ 3,479
Electronic banking fees	7,154	5,728	13,046	10,558
Mortgage banking income	1,618	1,670	2,674	2,776
Net gain on other real estate owned and other assets	376	229	512	491
Total Service Charges on Deposits [Member]
Schedule of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	6,197	5,146	12,747	9,969
Trust Account fees [Member]
Schedule of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	4,208	3,558	$ 9,263	7,850
Point of revenue recognition			Over time
WesMark Fees [Member]
Schedule of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	2,131	2,194	$ 4,191	4,405
Point of revenue recognition			Over time
Total Trust Fees [Member]
Schedule of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	6,339	5,752	$ 13,454	12,255
Commercial Banking Fees [Member]
Schedule of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	499	462	$ 967	869
Point of revenue recognition			Over time
Personal Service Charges [Member]
Schedule of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	5,698	4,684	$ 11,780	9,100
Point of revenue recognition			At a point in time & over time
Annuity Commissions [Member]
Schedule of Revenue Recognition [Line Items]
Total net securities brokerage revenue	1,454	1,310	$ 2,815	2,510
Point of revenue recognition			At a point in time
Equity And Debt Security Trades [Member]
Schedule of Revenue Recognition [Line Items]
Total net securities brokerage revenue	103	87	$ 206	189
Point of revenue recognition			At a point in time
Managed Money [Member]
Schedule of Revenue Recognition [Line Items]
Total net securities brokerage revenue	174	163	$ 331	304
Point of revenue recognition			Over time
Trail Commissions [Member]
Schedule of Revenue Recognition [Line Items]
Total net securities brokerage revenue	242	$ 249	$ 481	$ 476
Point of revenue recognition			Over time
Payment Processing Fees [Member]
Schedule of Revenue Recognition [Line Items]
Payment Processing Fees	$ 785		$ 1,433
Point of revenue recognition			At a point in time & over time
Electronic Banking Fees [Member]
Schedule of Revenue Recognition [Line Items]
Point of revenue recognition			At a point in time
Mortgage [Member]
Schedule of Revenue Recognition [Line Items]
Point of revenue recognition			At a point in time
Other Real Estate Owned and Other Assets [Member]
Schedule of Revenue Recognition [Line Items]
Point of revenue recognition			At a point in time

Comprehensive Income_(Loss) - C

Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 2,023,139	$ 1,403,026	$ 1,978,827	$ 1,395,321
Amounts reclassified from accumulated other comprehensive income/(loss)	515	538	988	926
Total other comprehensive (loss) gain	22,211	(6,276)	41,984	(20,794)
Ending Balance	2,074,116	1,524,106	2,074,116	1,524,106
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(16,542)	(18,626)
Other comprehensive income/(loss) before reclassifications			0
Amounts reclassified from accumulated other comprehensive income/(loss)	585	589	1,129	1,026
Total other comprehensive (loss) gain			1,129	1,026
Ending Balance	(15,413)	(17,600)	(15,413)	(17,600)
Accumulated Unrealized Gains (Losses) on Debt Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(21,522)	(13,250)
Other comprehensive income/(loss) before reclassifications			40,996	(21,720)
Amounts reclassified from accumulated other comprehensive income/(loss)	3		(30)
Total other comprehensive (loss) gain			40,966	(21,720)
Adoption of Accounting Standard ASU 2016-01		(1,063)		(1,063)
Ending Balance	19,444	(36,033)	19,444	(36,033)
Accumulated Unrealized Gains on Debt Securities Transferred from Available For Sale to Held to Maturity [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			193	381
Other comprehensive income/(loss) before reclassifications			0
Amounts reclassified from accumulated other comprehensive income/(loss)	(73)	(51)	(111)	(100)
Total other comprehensive (loss) gain			(111)	(100)
Ending Balance	82	281	82	281
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(18,098)	(47,076)	(37,871)	(31,495)
Other comprehensive income/(loss) before reclassifications			40,996	(21,720)
Amounts reclassified from accumulated other comprehensive income/(loss)			988	926
Total other comprehensive (loss) gain	22,211	(6,276)	41,984	(20,794)
Adoption of Accounting Standard ASU 2016-01		(1,063)		(1,063)
Ending Balance	$ 4,113	$ (53,352)	$ 4,113	$ (53,352)

Comprehensive Income_(Loss) -_2

Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Detail) (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Percentage of Federal and State income tax rate	23.00%	23.00%

Comprehensive Income_(Loss) - S

Comprehensive Income/(Loss) - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income/(Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities losses (gains) reclassified into earnings	$ (2,909)	$ (358)	$ (3,566)	$ (319)
Provision for income taxes	10,103	7,335	18,961	14,339
Employee benefits (Non-interest expense)	9,705	7,965	19,694	14,877
Interest and dividends on securities (Interest and dividend income)	(21,586)	(19,249)	(43,859)	(35,628)
Net effect on accumulated other comprehensive income/(loss) for the period	515	538	988	926
Accumulated Unrealized Gains (Losses) on Debt Securities Available for Sale [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net effect on accumulated other comprehensive income/(loss) for the period	3		(30)
Accumulated Unrealized Gains on Debt Securities Transferred from Available For Sale to Held to Maturity [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net effect on accumulated other comprehensive income/(loss) for the period	(73)	(51)	(111)	(100)
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net effect on accumulated other comprehensive income/(loss) for the period	585	589	1,129	1,026
Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member] | Accumulated Unrealized Gains (Losses) on Debt Securities Available for Sale [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities losses (gains) reclassified into earnings	4		(38)
Provision for income taxes	(1)		8
Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member] | Accumulated Unrealized Gains on Debt Securities Transferred from Available For Sale to Held to Maturity [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	21	15	38	31
Interest and dividends on securities (Interest and dividend income)	(94)	(66)	(149)	(131)
Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	(173)	(175)	(380)	(494)
Employee benefits (Non-interest expense)	$ 758	$ 764	$ 1,509	$ 1,520

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Allowance for credit losses associated with loan commitments	$ 1,766	$ 741	$ 607	$ 574
Liability associated with letters of credit	$ 200	$ 200

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Lines of credit	$ 1,909,282	$ 1,894,030
Loans approved but not closed	299,081	258,778
Overdraft limits	152,207	153,572
Letters of credit	45,960	42,841
Contingent obligations and other guarantees	$ 48,654	$ 61,509

Business Segments - Additional

Business Segments - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)Segment	Jun. 30, 2018USD ($)
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	$ 4,500	$ 4,000
Total non-fiduciary assets of the trust and investment services segment	3.9	$ 1.7
Trust and Investment Services [Member] | Customer-Related Intangible Assets [Member]
Segment Reporting Information [Line Items]
Total non-fiduciary assets of the trust and investment services segment	$ 2.6

Business Segments - Financial I

Business Segments - Financial Information by Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Interest and dividend income	$ 119,543	$ 98,888	$ 238,596	$ 185,203
Interest expense	21,083	16,541	41,774	29,667
Net interest income	98,460	82,347	196,822	155,536
Provision for credit losses	2,747	1,708	5,254	3,876
Net interest income after provision for credit losses	95,713	80,639	191,568	151,660
Non-interest income	31,156	23,408	58,929	47,491
Non-interest expense	71,952	63,543	146,385	118,114
Income before provision for income taxes	54,917	40,504	104,112	81,037
Provision for income taxes	10,103	7,335	18,961	14,339
Net income	44,814	33,169	85,151	66,698
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest and dividend income	119,543	98,888	238,596	185,203
Interest expense	21,083	16,541	41,774	29,667
Net interest income	98,460	82,347	196,822	155,536
Provision for credit losses	2,747	1,708	5,254	3,876
Net interest income after provision for credit losses	95,713	80,639	191,568	151,660
Non-interest income	24,817	17,656	45,475	35,236
Non-interest expense	67,957	60,026	138,233	110,920
Income before provision for income taxes	52,573	38,269	98,810	75,976
Provision for income taxes	9,611	6,865	17,848	13,276
Net income	42,962	31,404	80,962	62,700
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Non-interest income	6,339	5,752	13,454	12,255
Non-interest expense	3,995	3,517	8,152	7,194
Income before provision for income taxes	2,344	2,235	5,302	5,061
Provision for income taxes	492	470	1,113	1,063
Net income	$ 1,852	$ 1,765	$ 4,189	$ 3,998

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) $ / shares in Units, $ in Thousands	Jul. 23, 2019USD ($)Branch$ / sharesshares	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Subsequent Event [Line Items]
Total Assets		$ 12,494,653		$ 12,458,632
Portfolio loans, net of unearned income		7,737,854		7,656,281
Deposits		8,694,928		8,831,633
Total shareholders' equity		$ 2,074,116	$ 2,023,139	$ 1,978,827	$ 1,524,106	$ 1,403,026	$ 1,395,321
Subsequent Event [Member] | Old Line [Member] | Definitive Agreement and Plan of Merger [Member]
Subsequent Event [Line Items]
Total Assets	$ 3,100,000
Portfolio loans, net of unearned income	2,400,000
Deposits	2,400,000
Total shareholders' equity	$ 400,000
Number of branches acquired | Branch	37
Value of acquisition	$ 500,100
Number of shares issued for acquisition | shares	0.7844
Business acquisition, price per share | $ / shares	$ 29.22