Peoples Bancorp (PEBO) 10-K 1 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Feb. 28, 2019	Jun. 30, 2018
Entity Information [Line Items]
Entity Registrant Name	PEOPLES BANCORP INC.
Entity Central Index Key	318,300
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		19,681,659
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Public Float			$ 578,028
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Cash and cash equivalents:
Cash and due from banks	$ 61,775	$ 58,121	$ 61,775	$ 58,121
Interest-bearing deposits in other banks	15,837	14,073	15,837	14,073
Total cash and cash equivalents	77,612	72,194	77,612	72,194
Available-for-sale investment securities, at fair value (amortized cost of $804,655 at December 31, 2018 and $797,732 at December 31, 2017) (a)	791,891	795,187	791,891	795,187
Held-to-maturity investment securities, at amortized cost (fair value of $36,963 at December 31, 2018 and $41,213 at December 31, 2017)	36,961	40,928	36,961	40,928
Other investment securities (a)	42,985	38,371	42,985	38,371
Total investment securities	871,837	874,486	871,837	874,486
Loans, net of deferred fees and costs (b)	2,728,778	2,357,137	2,728,778	2,357,137
Allowance for loan losses	(20,195)	(18,793)	(20,195)	(18,793)
Net loans	2,708,583	2,338,344	2,708,583	2,338,344
Loans held for sale	5,470	2,510	5,470	2,510
Bank premises and equipment, net of accumulated depreciation	56,542	52,510	56,542	52,510
Bank owned life insurance	68,934	62,176	68,934	62,176
Goodwill	151,245	133,111	151,245	133,111
Other intangible assets	10,840	11,465	10,840	11,465
Other assets	40,391	34,890	40,391	34,890
Total assets	3,991,454	3,581,686	3,991,454	3,581,686
Deposits:
Non-interest-bearing	607,877	556,010	607,877	556,010
Interest-bearing	2,347,588	2,174,320	2,347,588	2,174,320
Total deposits	2,955,465	2,730,330	2,955,465	2,730,330
Short-term borrowings	356,198	209,491	356,198	209,491
Long-term borrowings	109,644	144,019	109,644	144,019
Accrued expenses and other liabilities (c)	50,007	39,254	50,007	39,254
Total liabilities	3,471,314	3,123,094	3,471,314	3,123,094
Stockholders’ Equity
Preferred stock, no par value, 50,000 shares authorized, no shares issued at December 31, 2018 and December 31, 2017	0	0	0	0
Common stock, no par value, 24,000,000 shares authorized, 20,124,378 shares issued at December 31, 2018 and 18,952,385 shares issued at December 31, 2017, including shares in treasury	386,814	345,412	386,814	345,412
Retained earnings (a)(c)(d)	160,346	134,362	160,346	134,362
Accumulated other comprehensive loss, net of deferred income taxes (a)(d)	(12,933)	(5,215)	(12,933)	(5,215)
Treasury stock, at cost, 601,289 shares at December 31, 2018 and 702,449 shares at December 31, 2017	(14,087)	(15,967)	(14,087)	(15,967)
Total stockholders’ equity	520,140	458,592	520,140	458,592
Total liabilities and stockholders’ equity	3,991,454	3,581,686	3,991,454	3,581,686
Other Investments and Securities, at Cost		7,800		7,800
Other comprehensive loss, net of tax (b)			5,020
Cumulative Effect on Retained Earnings, Net of Tax			3,700
Deferred Revenue	5,055	4,700	5,055	4,700
Income tax expense	$ 2,470	5,339	8,686	18,732
Adjustments for New Accounting Pronouncement [Member]
Other Investments and Securities, at Cost		7,800		7,800
Other comprehensive loss, net of tax (b)			5,000
Cumulative Effect on Retained Earnings, Net of Tax			3,700
Deferred Revenue		$ 4,700		4,700
Income tax expense			$ 700	$ 900

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Available for sale securities, amortized cost	$ 804,655	$ 797,732
Held-to-maturity securities, fair value	$ 36,963	$ 41,213
Preferred stock, shares authorized	50,000	50,000
Preferred stock, shares issued	0	0
Common stock, shares authorized	24,000,000	24,000,000
Common stock, shares issued	20,124,378	18,952,385
Treasury stock, shares	601,289	702,449

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest income:
Interest and fees on loans	$ 125,263,000	$ 103,043,000	$ 93,845,000
Interest and dividends on taxable investment securities	23,132,000	20,415,000	18,423,000
Interest on tax-exempt investment securities	2,467,000	2,923,000	3,126,000
Other interest income	402,000	144,000	50,000
Total interest income	151,264,000	126,525,000	115,444,000
Interest expense:
Interest on deposits	13,705,000	7,154,000	5,942,000
Interest on short-term borrowings	5,238,000	1,534,000	508,000
Interest on long-term borrowings	2,709,000	4,460,000	4,129,000
Total interest expense	21,652,000	13,148,000	10,579,000
Net interest income	129,612,000	113,377,000	104,865,000
Provision for loan losses	5,448,000	3,772,000	3,539,000
Net interest income after provision for loan losses	124,164,000	109,605,000	101,326,000
Non-interest income:
Insurance income	14,812,000	14,204,000	13,846,000
Mortgage banking income	3,333,000	1,872,000	1,304,000
Bank owned life insurance income	1,955,000	1,950,000	1,414,000
Net (loss) gain on investment securities	(146,000)	2,983,000	930,000
Net loss on asset disposals and other transactions	(334,000)	(63,000)	(1,133,000)
Other non-interest income (a)	2,655,000	1,865,000	1,826,000
Total non-interest income	56,754,000	55,573,000	50,867,000
Non-interest expense:
Salaries and employee benefit costs	69,308,000	60,276,000	57,433,000
Net occupancy and equipment expense	11,272,000	10,633,000	10,735,000
Professional fees	7,862,000	6,575,000	7,436,000
Electronic banking expense	6,057,000	5,874,000	5,992,000
Data processing and software expense	5,419,000	4,441,000	3,763,000
Amortization of other intangible assets	3,338,000	3,516,000	4,030,000
Franchise tax expense	2,771,000	2,246,000	2,192,000
Marketing expense	1,962,000	1,714,000	1,594,000
FDIC insurance expense	1,546,000	1,816,000	1,899,000
Foreclosed real estate and other loan expenses	1,431,000	873,000	859,000
Communication expense	1,265,000	1,475,000	2,261,000
Other non-interest expense	13,746,000	8,536,000	8,717,000
Total non-interest expense	125,977,000	107,975,000	106,911,000
Income before income taxes	54,941,000	57,203,000	45,282,000
Income tax expense	8,686,000	18,732,000	14,125,000
Net income	$ 46,255,000	$ 38,471,000	$ 31,157,000
Earnings per common share - basic	$ 2.42	$ 2.12	$ 1.72
Earnings per common share - diluted	$ 2.41	$ 2.10	$ 1.71
Weighted-average number of common shares outstanding - basic	18,991,768	18,050,189	18,013,693
Weighted-average number of common shares outstanding - diluted	19,122,260	18,208,684	18,155,463
Fiduciary and Trust [Member]
Non-interest income:
Revenue from contract with customer, including assessed tax	$ 12,543,000	$ 11,558,000	$ 10,589,000
Credit and Debit Card [Member]
Non-interest income:
Revenue from contract with customer, including assessed tax	11,477,000	10,358,000	10,353,000
Deposit Account [Member]
Non-interest income:
Revenue from contract with customer, including assessed tax	9,778,000	9,614,000	10,662,000
Interest Rate Swap | transaction fee [Member]
Non-interest income:
Revenue from contract with customer, including assessed tax	681,000	1,232,000	$ 1,076,000
Adjustments for New Accounting Pronouncement [Member]
Non-interest expense:
Income tax expense	700,000	$ 900,000
Fair value adjustment on equity investment securities	$ (207,000)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other comprehensive (loss) income:
Net income	$ 46,255	$ 38,471	$ 31,157
Available-for-sale investment securities:
Gross unrealized holding loss arising in the period	(3,910)	(555)	(2,590)
Related tax benefit	(821)	195	906
Less: reclassification adjustment for net (loss) gain included in net income	(146)	2,983	930
Related tax benefit (expense)	31	(1,044)	(326)
Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2018-02	0	(370)	0
Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2016-01	(5,020)
Net effect on other comprehensive (loss) income	(7,994)	(2,669)	(2,288)
Defined benefit plans:
Net gain (loss) arising during the period	325	(616)	(232)
Related tax (expense) benefit	(69)	216	81
Amortization of unrecognized loss and service cost on benefit plans	99	96	89
Related tax expense	(21)	(34)	(31)
Recognition of loss due to settlement and curtailment	267	242	0
Related tax expense	(56)	(85)	0
Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2018-02	0	(754)	0
Net effect on other comprehensive income (loss)	545	(935)	(93)
Net (loss) gain arising during the period	(341)	(395)	1,824
Related tax benefit (expense)	72	138	(638)
Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2018-02	0	200	0
Net effect on other comprehensive (loss) income	(269)	(57)	1,186
Total other comprehensive loss, net of tax	(7,718)	(3,661)	(1,195)
Total comprehensive income	38,537	34,810	29,962
Income tax expense	8,686	18,732	$ 14,125
Adjustments for New Accounting Pronouncement [Member]
Available-for-sale investment securities:
Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2016-01	(5,000)
Income tax expense	$ 700	$ 900

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity - USD ($)	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	ASB Financial Corp.Common Stock	Restricted Shares	Restricted SharesCommon Stock	Restricted SharesTreasury Stock	New Accounting Pronouncement, Early Adoption, Effect [Member]Retained Earnings
Balance at beginning of period at Dec. 31, 2015	$ 419,789,000	$ 343,948,000	$ 90,790,000	$ (359,000)	$ (14,590,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	31,157,000		31,157,000
Other comprehensive loss, net of tax (b)	(1,195,000)			(1,195,000)
Cash dividends declared	(11,653,000)		(11,653,000)
Exercise of stock appreciation rights	0	40,000			(40,000)
Reissuance of treasury stock for deferred compensation plan for Boards of Directors	(232,000)				(232,000)		$ 0	$ 1,297,000	$ (1,297,000)
Tax benefit from exercise of stock options	26,000	26,000
Repurchase of treasury stock in connection with employee incentive plan and under compensation plan for Boards of Directors	(515,000)				(515,000)
Purchase of treasury stock					(4,965,000)
Common shares issued under dividend reinvestment plan	437,000	437,000
Common shares issued under compensation plan for Board of Directors	245,000	18,000			263,000
Stock-based compensation	1,332,000	1,332,000			0
Common shares issued under employee stock purchase plan	371,000	16,000			355,000
Balance at end of period at Dec. 31, 2016	435,261,000	344,404,000	110,294,000	(1,554,000)	(17,883,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income tax expense	14,125,000
Net income	38,471,000		38,471,000
Amounts reclassified out of retained earnings, net of tax, per ASU 2014-09 (c)	(924,000)									$ 924,000
Other comprehensive loss, net of tax (b)	(3,661,000)			(3,661,000)
Other comprehensive loss, net of tax (b)	(2,737,000)
Cash dividends declared	(15,327,000)		(15,327,000)
Exercise of stock appreciation rights	0	6,000			(6,000)
Reissuance of treasury stock for deferred compensation plan for Boards of Directors	(500,000)				(500,000)		0	1,455,000	(1,455,000)
Repurchase of treasury stock in connection with employee incentive plan and under compensation plan for Boards of Directors	(508,000)				(508,000)
Common shares issued under dividend reinvestment plan	525,000	525,000
Common shares issued under compensation plan for Board of Directors	295,000	88,000			207,000
Stock-based compensation	1,747,000	1,747,000
Common shares issued under employee stock purchase plan	365,000	109,000			256,000
Balance at end of period at Dec. 31, 2017	458,592,000	345,412,000	134,362,000	(5,215,000)	(15,967,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income tax expense	18,732,000
Income tax expense | Adjustments for New Accounting Pronouncement [Member]	900,000
Deferred Revenue	4,700,000
Deferred Revenue | Adjustments for New Accounting Pronouncement [Member]	4,700,000
Net income	46,255,000		46,255,000
Other comprehensive loss, net of tax (b)	5,020,000
Other comprehensive loss, net of tax (b) | Adjustments for New Accounting Pronouncement [Member]	5,000,000
Amounts reclassified out of retained earnings, net of tax, per ASU 2014-09 (c)	5,020,000
Other comprehensive loss, net of tax (b)	(7,718,000)
Other comprehensive loss, net of tax (b)	(2,698,000)			(7,718,000)
Cash dividends declared	(21,578,000)		(21,578,000)
Exercise of stock appreciation rights	0	2,000			(2,000)
Reissuance of treasury stock for deferred compensation plan for Boards of Directors	(46,000)				(46,000)		$ 0	$ 2,748,000	$ (2,748,000)
Repurchase of treasury stock in connection with employee incentive plan and under compensation plan for Boards of Directors	(1,380,000)				(1,380,000)
Purchase of treasury stock	5,000,000
Common shares issued under dividend reinvestment plan	668,000	668,000
Common shares issued under compensation plan for Board of Directors	298,000	104,000			194,000
Stock-based compensation	2,359,000	2,359,000			416,000
Common shares issued under employee stock purchase plan	393,000	123,000			270,000
Issuance of common shares related to acquisition of ASB	40,898,000					$ 40,898,000
Amounts reclassified out of retained earnings, net of tax, per ASU 2014-09 (c) | Accounting Standards Update 2014-09 [Member]			(3,713,000)
Balance at end of period at Dec. 31, 2018	520,140,000	$ 386,814,000	$ 160,346,000	$ (12,933,000)	$ (14,087,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income tax expense	8,686,000
Income tax expense | Adjustments for New Accounting Pronouncement [Member]	700,000
Cumulative Effect on Retained Earnings, Net of Tax	3,700,000
Cumulative Effect on Retained Earnings, Net of Tax | Adjustments for New Accounting Pronouncement [Member]	3,700,000
Deferred Revenue	$ 5,055,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities:
Net income	$ 46,255	$ 38,471	$ 31,157
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion, net	18,204	18,142	19,169
Provision for loan losses	5,448	3,772	3,539
Bank owned life insurance income	(1,955)	(1,950)	(1,414)
Net loss (gain) on investment securities	146	(2,983)	(930)
Loss on debt extinguishment	13	0	707
Loans originated for sale	(123,134)	(63,730)	(69,123)
Proceeds from sales of loans	124,796	66,025	67,421
Net gains on sales of loans	(2,846)	(1,445)	(1,047)
Deferred income tax benefit	(309)	(2,779)	(2,462)
Increase in accrued expenses	147	950	3,972
Increase in interest receivable	(854)	(807)	(1,278)
Excess tax benefit from share-based payments	0	0	(26)
(Decrease) increase in other assets	(533)	6,050	6,974
Other, net	10,072	1,311	3,999
Net cash provided by operating activities	75,243	61,027	60,658
Available-for-sale investment securities:
Purchases	(137,818)	(180,109)	(166,241)
Proceeds from sales	14,489	8,355	30,734
Proceeds from principal payments, calls and prepayments	122,986	143,000	127,824
Held-to-maturity investment securities:
Purchases	0	(1,310)	0
Proceeds from principal payments	4,281	3,142	2,167
Other investment securities:
Purchases	(2,689)
Proceeds from sales	7,622
Net increase in loans held for investment	(134,071)	(130,397)	(148,951)
Net expenditures for premises and equipment	(4,531)	(4,865)	(5,436)
Proceeds from sales of other real estate owned	278	556	240
Purchase of bank owned life insurance	0	0	(35,000)
Business acquisitions, net of cash received	4,695	(1,069)	(244)
(Investment in) return of limited partnership and tax credit funds	(5,398)	9	(3,451)
Net cash used in investing activities	(130,156)	(162,688)	(198,358)
Financing activities:
Net increase (decrease) in non-interest-bearing deposits	22,380	(178,411)	16,482
Net increase (decrease) in interest-bearing deposits	3,449	398,991	(42,655)
Net increase (decrease) in short-term borrowings	61,883	(146,721)	145,221
Proceeds from long-term borrowings	0	55,000	55,000
Payments on long-term borrowings	(4,591)	(5,738)	(24,361)
Cash dividends paid	(20,915)	(14,706)	(11,173)
Repurchase of treasury stock in connection with employee incentive program and compensation plan for Boards of Directors to be held as treasury stock	0	0	(4,965)
Repurchase of treasury stock in connection with employee incentive program and compensation plan for Boards of Directors to be held as treasury stock	1,380	508	515
Proceeds from issuance of common shares	25	9	18
Payment for Contingent Consideration Liability, Financing Activities	(520)	(207)	(347)
Excess tax benefit from share-based payments	0	0	26
Net cash provided by financing activities	60,331	107,709	132,731
Net increase (decrease) in cash and cash equivalents	5,418	6,048	(4,969)
Cash and cash equivalents at beginning of period	72,194	66,146	71,115
Cash and cash equivalents at end of period	77,612	72,194	66,146
Supplemental cash flow information:
Interest paid	19,920	13,001	10,756
Income taxes paid	6,135	14,036	11,890
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Transfers from loans to other real estate owned	$ 90	219	$ 202
Subsequent receipt of proceeds [Member]
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Available-for-sale investment security sales settled in a subsequent period		$ 229

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The accounting and reporting policies of Peoples Bancorp Inc. and subsidiaries ("Peoples" refers to Peoples Bancorp Inc. and its consolidated subsidiaries collectively, except where the context indicates the reference relates solely to Peoples Bancorp Inc.) conform to generally accepted accounting principles in the United States of America ("US GAAP") and to general practices within the banking industry. The preparation of the financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Certain items in prior financial statements have been reclassified to conform to the current presentation, which had no impact on net income, total comprehensive income, net cash provided by operating activities or total stockholders' equity. The following is a summary of significant accounting policies followed in the preparation of the financial statements: Consolidation: Peoples' Consolidated Financial Statements include subsidiaries in which Peoples has a controlling financial interest, principally defined as owning a voting interest of greater than 50%. In addition, entities not controlled by voting interest or in which the equity investors do not bear the residual economic risks, but for which Peoples is the primary beneficiary are also consolidated. The Consolidated Financial Statements include the accounts of Peoples and its consolidated subsidiaries, Peoples Bank and Peoples Investment Company, along with their wholly-owned subsidiaries, and NB&T Statutory Trust III, for which Peoples holds all of the common securities. All significant intercompany accounts and transactions have been eliminated. Cash and Cash Equivalents: Cash and cash equivalents include cash on hand, balances due from other banks, interest-bearing deposits in other banks, federal funds sold and other short-term investments with original maturities of ninety days or less. Peoples had no restricted funds at December 31, 2018 and $1.0 million of restricted funds at December 31, 2017, in interest-bearing deposits in other banks. which were being used as collateral and not available for withdrawal. Investment Securities: Investment securities are recorded initially at cost, which includes premiums and discounts if purchased at other than par or face value. Peoples amortizes premiums and accretes discounts as an adjustment to interest income on a level yield basis. The cost of investment securities sold, and any resulting gain or loss, is based on the specific identification method and recognized as of the trade date. Management determines the appropriate classification of investment securities at the time of purchase. Held-to-maturity securities are those securities that Peoples has the positive intent and ability to hold to maturity and are recorded at amortized cost. Available-for-sale securities are those securities that would be available to be sold in the future in response to Peoples' liquidity needs, changes in market interest rates, and asset-liability management strategies, among other considerations. Available-for-sale securities are reported at fair value, with unrealized gains and losses reported in total stockholders' equity as a separate component of accumulated other comprehensive income or loss, net of applicable deferred income taxes. Certain restricted equity investment securities that do not have readily determinable fair values and for which Peoples does not exercise significant influence, are carried at cost. These cost method securities are reported in other investment securities on the Consolidated Balance Sheets and consist primarily of shares of the Federal Home Loan Bank of Cincinnati (the "FHLB") and the Federal Reserve Bank of Cleveland (the "FRB"). Management systematically evaluates investment securities for other-than-temporary declines in fair value on a quarterly basis. This analysis requires management to consider various factors, which include (1) the duration and magnitude of the decline in value, (2) the financial condition of the issuer or issuers, and (3) the structure of the security. An impairment loss is recognized in earnings only when (1) Peoples intends to sell the debt security, (2) it is more likely than not that Peoples will be required to sell the security before recovery of its amortized cost basis, or (3) Peoples does not expect to recover the entire amortized cost basis of the security. In situations where Peoples intends to sell or when it is more likely than not that Peoples will be required to sell the security, the entire impairment loss must be recognized in earnings. In all other situations, only the portion of the impairment loss representing the credit loss must be recognized in earnings, with the remaining portion being recognized in total stockholders' equity as a component of accumulated other comprehensive income, net of applicable deferred income taxes. Fair Value Measurements: The measurement of fair value under US GAAP uses a hierarchy intended to maximize the use of observable inputs and minimize the use of unobservable inputs. This hierarchy uses three levels of inputs to measure the fair value of assets and liabilities as follows: Level 1: Quoted prices in active exchange markets for identical assets or liabilities; also includes certain U.S. Treasury and other U.S. government and agency securities actively traded in over-the-counter markets. Level 2: Observable inputs other than Level 1 including quoted prices for similar assets or liabilities, quoted prices in less active markets, or other observable inputs that can be corroborated by observable market data; also includes derivative contracts whose value is determined using a pricing model with observable market inputs or can be derived principally from, or corroborated by, observable market data. This category generally includes certain U.S. government and agency securities, corporate debt securities, derivative instruments, and residential mortgage loans held for sale. Level 3: Unobservable inputs supported by little or no market activity for financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation; also includes observable inputs for single dealer nonbinding quotes not corroborated by observable market data. This category generally includes certain private equity investments, retained interests from securitizations, and certain collateralized debt obligations. Securities Sold Under Agreements to Repurchase ("Repurchase Agreements"): Peoples enters into Repurchase Agreements with customers and other financial service companies, which are considered financings. As such, these obligations are recorded as a liability on the Consolidated Balance Sheets and disclosed in Note 8 Short-Term Borrowings and Note 9 Long-Term Borrowings, as appropriate. Securities pledged as collateral under Repurchase Agreements are included in investment securities on the Consolidated Balance Sheets and are disclosed in Note 3 Investment Securities. The fair value of the collateral pledged to a third party is continually monitored and additional collateral is pledged or returned, as deemed appropriate. Loans: Loans originated that Peoples has the positive intent and ability to hold for the foreseeable future or to maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs, charge-offs and an allowance for loan losses. The foreseeable future is based upon current market conditions and business strategies, as well as balance sheet management and liquidity. As the conditions change, so may management's view of the foreseeable future. Net deferred loan origination costs were $ 9.5 million and $ 7.5 million at December 31, 2018 and 2017 , respectively. A loan is considered impaired when information and events indicate it is probable that collection of all contractual principal and interest payments is doubtful. Impairment is evaluated collectively for smaller balance loans of a similar nature, primarily consumer and residential real estate loans, and on an individual loan basis for all loans to borrowers with an aggregate unpaid principal balance in excess of $1 million , for which an annual evaluation is performed for possible credit deterioration. This loan review process provides Peoples with opportunities to identify potential problem loans and take proactive actions to assure repayment of the loan or minimize Peoples' risk of loss, such as reviewing the relationship more frequently based upon the loan quality rating and aggregate debt outstanding. Upon detection of the reduced ability of a borrower to meet cash flow obligations, the loan is reviewed for possible downgrade or placement on nonaccrual status. Loan relationships whose aggregate debt to Peoples is equal to or less than $1 million are reviewed on an event driven basis. Peoples also completes evaluation procedures for a selection of larger loan relationships on a quarterly basis. Triggers for review include knowledge of adverse events affecting the business, receipt of financial statements indicating deteriorating credit quality and other events. Peoples typically places any loan deemed to be impaired on nonaccrual status and allocates a specific portion of the allowance for loan losses, if necessary, to reduce the net carrying value of the loan to its estimated net realizable value. Impaired loans, or portions thereof, are charged off when deemed uncollectable. Upon detection of the reduced ability of a borrower to meet cash flow obligations, consumer and residential real estate loans typically are charged down to the net realizable value, with the residual balance placed on nonaccrual status. Loans acquired in a business combination that have evidence of deterioration of credit quality, commonly referred to as "purchased credit impaired" loans, since origination and for which it is probable, at acquisition, that Peoples will be unable to collect all contractually required payments are initially recorded at fair value (the present value of the amounts expected to be collected) with no valuation allowance. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan is recognized as interest income on a level yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition are not recognized. Over the life of these acquired loans, management continues to monitor each acquired purchased credit impaired loan portfolio for changes in credit quality. Increases in expected cash flows subsequent to acquisition are recognized prospectively over the remaining life of the acquired purchased credit impaired loans as a yield adjustment on the loans. Subsequent decreases in expected cash flows are recognized as an impairment, with the amount of the expected loss included in provision for loan losses in the period in which it is identified, and establishes an allowance for loan losses for the expected losses. These purchased credit impaired loans are considered to be accruing and performing even though collection of contractual payments on the loans may be in doubt, as income continues to be accreted as long as expected cash flows can be reasonably estimated. Loans acquired in a business combination that are not impaired are recorded at fair value, with no valuation allowance, and the difference between the acquisition date fair value and the contractual amounts due at the acquisition date represents the discount or premium to a loan's cost basis and is accreted or amortized to interest income over the loan's remaining life using the level yield method. Subsequent to the acquisition date, the method utilized to estimate the required allowance for loan losses for these loans is similar to originated loans; however, Peoples records a provision for loan losses only when the required allowance exceeds the remaining fair value adjustment. Loans Held for Sale: Loans originated and intended to be sold in the secondary market, generally one-to-four family residential loans, are carried at the lower of cost or estimated fair value determined on an aggregate basis. Gains and losses on sales of loans held for sale are included in mortgage banking income. Loans originated with the intent to be held in the portfolio are subsequently transferred to held for sale when a decision is made to sell these loans. At the time of a loan's transfer to the held for sale classification, the loan is recorded at the lower of cost or its fair value. Any reduction in the loan's fair value is reflected as a write-down of the recorded investment resulting in a new cost basis, with a corresponding charge against the allowance for loan losses. If the fair value of a loan classified as held for sale in subsequent periods is less than its cost basis, the carrying value of the loan is adjusted accordingly, with the corresponding loss recognized in earnings. Interest Rate Lock Commitments: Peoples enters into interest rate lock commitments with borrowers and best efforts commitments with investors on mortgage loans originated for sale into the secondary markets to manage the inherent interest rate and pricing risk associated with selling loans. An interest rate lock commitment generally terminates once the loan is funded, the lock period expires or the borrower decides not to contract for the loan. A best efforts commitment generally terminates once the loan is sold, the commitment period expires or the borrower decides not to contract for the loan. These commitments are considered derivatives, which are generally accounted for by recognizing their estimated fair value on the Consolidated Balance Sheets as either an other asset or an other liability. The valuation of such commitments does not consider expected cash flows related to the servicing of the future loan. Management has determined these derivatives do not have a material effect on Peoples' financial position, results of operations or cash flows. Allowance for Loan Losses: The allowance for loan losses is a valuation reserve established through provisions for loan losses charged against income. The allowance for loan losses is maintained at a level that management deems sufficient to absorb probable losses inherent in the loan portfolio. Loans deemed to be uncollectable are charged against the allowance for loan losses, while recoveries of previously charged off amounts are credited to the allowance for loan losses. The allowance for loan losses is comprised of specific valuation allowances for loans evaluated individually for impairment and general allocations for pools of homogeneous loans with similar risk characteristics and trends. Peoples' homogenous loan pools include similarly risk-graded commercial and industrial loans, similarly risk-graded commercial real estate loans, real estate construction loans (both commercial and residential), residential real estate loans, consumer home equity loans, and indirect and other consumer loans. Management's evaluation of the appropriateness of the allowance for loan losses and the related provision for loan losses is based upon a quarterly analysis of the portfolio. While portions of the allowance for loan losses may be allocated to specific loans, the entire allowance for loan losses is available for any loan charged off by management. The allowance for loan losses related to specific loans is based on management's estimate of potential losses on impaired loans as determined by (1) the present value of expected future cash flows, (2) the fair value of collateral if the loan is determined to be collateral dependent, or (3) the loan's observable market price. The general allocations to specific loan pools are based on the historical loss rates for specific loan types and the internal risk grade, if applicable, adjusted for both internal and external qualitative risk factors. The calculation of historical loss rates for pools of similar loans with similar characteristics is based upon the proportion of actual charge-offs experienced to the total population of loans in the pool. The historical loss rates are periodically updated based on actual charge-off experience. The qualitative economic and business conditions and developments that affect the collectibility of the portfolio, including the condition of various market segments, which are considered by management include, among other factors, (1) changes in international, national, regional and local economic and business conditions, (2) changes in asset quality, (3) changes in loan portfolio volume, (4) the composition and concentrations of credit, (5) changes in the value of underlying collateral due to economic or market conditions, and (6) effectiveness of Peoples' loan policies, procedures and internal controls. The allowance for loan losses established for each homogenous loan pool represents the product of the historical loss rate, adjusted for qualitative factors, and the total dollar amount of the loans in the pool. Peoples categorizes loans involving commercial borrowers into risk categories based upon an established grading matrix. This system is used to manage the risk within its commercial lending activities, evaluate changes in the overall credit quality of the loan portfolio and evaluate the appropriateness of the allowance for loan losses. Loan grades are assigned at the time a new loan or lending commitment is extended by Peoples and may be changed at any time when circumstances warrant. Loans to borrowers with an aggregate unpaid principal balance in excess of $1 million are reviewed on an annual basis for possible credit deterioration. Loan relationships whose aggregate credit exposure to Peoples is equal to or less than $1 million are reviewed on an event driven basis. Triggers for review include knowledge of adverse events affecting the borrower's business, receipt of financial statements indicating deteriorating credit quality or other similar events. Adversely classified loans are generally reviewed on a quarterly basis. The primary factors considered when assigning a risk grade to a loan include (1) reliability and sustainability of the primary source of repayment, (2) past, present and projected financial condition of the borrower, and (3) current economic and industry conditions. Other factors that could influence the risk grade assigned include the type and quality of collateral and the strength of guarantors. The primary source of repayment for commercial real estate loans and commercial and industrial loans is normally the operating cash flow of the business available to repay debt. Management's analysis of operating cash flow for commercial real estate loans secured by non-owner occupied properties takes into account factors such as rent rolls and vacancy statistics. Management's analysis of operating cash flow for commercial real estate loans secured by owner occupied properties and all commercial and industrial loans considers the profitability, liquidity and leverage of the business. The evaluation of construction loans includes consideration of the borrower's ability to complete construction within the established budget. The primary factors considered when classifying residential real estate, home equity lines of credit and consumer loans include the loan's past due status and declaration of bankruptcy by the borrower(s). The classification of residential real estate and home equity lines of credit also takes into consideration the current value of the underlying collateral. Peoples also evaluates unfunded commitments for construction loans, floor plan lines of credit, home equity lines of credit, other credit lines and letters of credit on a quarterly basis. The calculation of the reserve for unfunded commitments utilizes the same look back period as the allowance for loan losses, and is based on the reported losses on unfunded commitments during this look back period. This annualized loss rate is then applied to the probable drawn amount of the pooled unfunded commitments to determine the required reserve. Peoples also evaluates classified credit exposures with unfunded commitments individually to determine if a loss is both probable and reasonably estimable. Troubled Debt Restructuring ("TDR"): The restructuring of a loan is considered a TDR if both (1) the borrower is experiencing financial difficulties and (2) the creditor has granted a concession. Loans acquired that are restructured after acquisition are not considered TDRs if the loans evidenced credit deterioration as of the acquisition date and are accounted for in pools of purchased credit impaired loans. In assessing whether or not a borrower is experiencing financial difficulties, Peoples considers information currently available regarding the financial condition of the borrower. This information includes, but is not limited to, whether (1) the borrower is currently in payment default on any of the borrower's debt; (2) a payment default is probable in the foreseeable future without the modification; (3) the borrower has declared or is in the process of declaring bankruptcy; and (4) the borrower's projected cash flow is insufficient to satisfy contractual payments due under the original terms of the loan without a modification. Peoples considers all aspects of the modification to loan terms to determine whether or not a concession has been granted to the borrower. Key factors considered by Peoples include the borrower's ability to access funds at a market rate for loans with similar risk characteristics, the significance of the modification relative to the unpaid principal loan balance or collateral value underlying the loan, and the significance of a delay in the timing of payments relative to the original contractual terms of the loan. The most common concessions granted by Peoples generally include one or more modifications to the terms of the loan, such as (1) a reduction in the interest rate for the remaining life of the loan, (2) an extension of the maturity date at an interest rate lower than the current market rate for a new loan with similar risk, (3) a temporary period of interest-only payments, and (4) a reduction in the contractual payment amount for either a short period or the remaining term of the loan. All TDRs are considered impaired loans and are evaluated individually to determine if a write-down is required and if they should be on accrual or nonaccrual status. Bank Premises and Equipment: Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on the straight-line method over the estimated useful lives of the related assets owned. Major improvements to leased facilities are capitalized and included in bank premises at cost less accumulated depreciation, which is calculated on the straight-line method over the lesser of the remaining term of the leased facility or the estimated economic life of the improvement. Investments in Affordable Housing Limited Partnerships: Investments in affordable housing consist of investments in limited partnerships that operate qualified affordable housing projects or that invest in other limited partnerships formed to operate affordable housing projects. These investments are considered variable interest entities for which Peoples is not the primary beneficiary. Peoples generally utilizes the effective yield method to account for these investments with the tax credits, net of the amortization of the investment, reflected in the Consolidated Statements of Income as a reduction in income tax expense. The unamortized amount of the investments is recorded in other assets and totaled $ 9.6 million and $ 4.7 million at December 31, 2018 and 2017 , respectively. Other Real Estate Owned ("OREO"): OREO, included in other assets on the Consolidated Balance Sheets, is comprised primarily of commercial and residential real estate properties acquired by Peoples in satisfaction of a loan. OREO obtained in satisfaction of a loan is recorded at the lower of cost or estimated fair value, less estimated costs to sell the property. Peoples had OREO totaling $ 94,000 at December 31, 2018 and $208,000 at December 31, 2017 . Business Combinations: Business combinations are accounted for using the acquisition method of accounting. Under this accounting method, the acquired company's net assets are recorded at fair value on the date of acquisition, and the results of operations of the acquired company are combined with Peoples' from the acquisition date forward. Costs related to the acquisition are expensed as incurred. The purchase price paid over the fair value of the net assets acquired, including intangible assets with finite lives, is recorded as goodwill. Goodwill and Other Intangible Assets: Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired in the business combination. Goodwill is not amortized but is tested for impairment when indicators of impairment exist, or at least annually on October 1. Based upon the most recently completed goodwill impairment test, Peoples concluded the recorded value of goodwill was not impaired as of December 31, 2018 , based upon the estimated fair value of Peoples' single reporting unit. Peoples' other intangible assets include customer relationship intangible assets, core deposit intangible assets and servicing rights representing the net present value of future economic benefit to be earned from acquired customer relationships with definite useful lives. These intangible assets are amortized on an accelerated basis over their estimated lives ranging from 7 to 10 years. Servicing Rights: Servicing rights represent the right to service loans sold to third-party investors. Loans that are sold are primarily mortgage loans, but also include small business and agricultural loans. Servicing rights are recognized separately as a servicing asset or liability whenever Peoples undertakes an obligation to service financial assets. Servicing rights are reported in other intangible assets on the Consolidated Balance Sheets. Serviced loans that have been completely sold are not included on the Consolidated Balance Sheets. Loan servicing income included in mortgage banking income includes servicing fees received from the third-party investors and certain charges collected from the borrowers. Peoples initially records servicing rights at fair value at the time of the sale of the loans to the third-party investor. Peoples follows the amortization method for the subsequent measurement of each class of separately recognized servicing assets and liabilities. Under the amortization method, Peoples amortizes the value of servicing assets or liabilities in proportion to, and over the period of, estimated net servicing income or net servicing loss, and assesses servicing assets or liabilities for impairment or increased obligation based on the fair value at each reporting date. The fair value of the servicing rights is determined by using a discounted cash flow model, which estimates the present value of the future net cash flows of the servicing portfolio based on various factors, such as servicing costs, expected prepayment speeds and discount rates. Trust Assets Under Administration and Management: Peoples manages certain assets held in a fiduciary or agency capacity for customers. These assets under administration and management, other than cash on deposit at Peoples, are not included in the Consolidated Balance Sheets since they are not assets of Peoples. Interest Income Recognition: Interest income on loans and investment securities is recognized by methods that result in level rates of return on principal amounts outstanding, including yield adjustments resulting from the amortization of loan costs and premiums on investment securities, and accretion of loan fees and discounts on investment securities. Since mortgage-backed securities comprise a sizable portion of Peoples' investment portfolio, a significant increase in principal payments on those securities can impact interest income due to the corresponding acceleration of premium amortization or discount accretion. Peoples discontinues the accrual of interest on a loan when conditions cause management to believe collection of all or any portion of the loan's contractual interest is doubtful. Such conditions may include the borrower being 90 days or more past due on any contractual payments, or current information regarding the borrower's financial condition and repayment ability. All unpaid accrued interest deemed uncollectable is reversed, which reduces Peoples' net interest income. Interest received on nonaccrual loans is included in income only if principal recovery is reasonably assured. Revenue Recognition: Peoples recognizes revenues as they are earned based on contractual terms, or as services are provided and collectability is reasonably assured. Peoples’ principal source of revenue is interest income, which is recognized on an accrual basis primarily according to formulas in written contracts, such as loan agreements or securities contracts. As of January 1, 2018, Peoples adopted ASU 2014-09 - Revenue from Contracts with Customers (Topic 606), and all subsequent updates that modified Accounting Standards Codification ("ASC") 606. Peoples elected to adopt this new accounting guidance using the modified retrospective approach. The modified retrospective approach uses a cumulative-effect adjustment to retained earnings to reflect uncompleted contracts in the initial application of the guidance. As of January 1, 2018, Peoples recorded a cumulative-effect adjustment for uncompleted contracts, which resulted in a reduction to retained earnings and an increase in accrued expenses and other liabilities of $3.7 million , which was net of federal income taxes. The impact during 2018 was an increase in insurance income and a decrease in retained earnings of $369,000 as a result of applying ASC 606. Prior period amounts are not adjusted and continue to be reported under the accounting standards in effect for those respective periods. Estimates of variable consideration are included in revenue to the extent that it is probable that a significant reversal of cumulative revenue will not occur, once the uncertainty is resolved. Peoples' contracts with customers are short-term in nature, and are recognized under the following revenue streams: Insurance Income: Insurance income generally consists of commissions and fees from the sale of insurance policies, fees related to third-party administration services and performance-based commissions from insurance companies. Peoples recognizes commission income from the sale of insurance policies when it acts as an agent between the insurance carrier and policyholder, arranging for the insurance carrier to provide policies to policyholders, and acts on behalf of the insurance carrier by providing customer service to the policyholders during the respective policy periods. Commission income is recognized over time, using the output method of time elapsed, which corresponds with the underlying insurance policy period, for which Peoples is obligated to perform under contract with the insurance carrier. Commission income is variable, as it is comprised of a certain percentage of the underlying policy premium. Peoples estimates the variable consideration based upon the "most likely amount" method, and does not expect or anticipate a significant reversal of revenue in future periods, based upon historical experience. Payment is due from the insurance carrier for commission income once the insurance policy has been sold. Peoples has elected to apply a practical expedient related to capitalizable costs, which are the commissions paid to insurance producers, and will expense these commissions paid to insurance producers as incurred, as these costs are related to the commission income and would have been amortized within one year or less if they had been capitalized, the same period over which the commission income was earned. Fees related to third-party administration services performed are recognized over time, during the period in which services have been provided, and are recognized monthly in the mo

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value represents the amount expected to be received to sell an asset or paid to transfer a liability in its principal or most advantageous market in an orderly transaction between market participants at the measurement date. In accordance with fair value accounting guidance, Peoples measures, records and reports various types of assets and liabilities at fair value on either a recurring or a non-recurring basis in the Consolidated Financial Statements. Those assets and liabilities are presented below in the sections entitled "Assets and Liabilities Required to be Measured and Reported at Fair Value on a Recurring Basis" and "Assets and Liabilities Required to be Measured and Reported at Fair Value on a Non-Recurring Basis." Depending on the nature of the asset or liability, Peoples uses various valuation methodologies and assumptions to estimate fair value. The measurement of fair value under US GAAP uses a hierarchy, which is described in Note 1 Summary of Significant Accounting Policies. Assets and liabilities are assigned to a level within the fair value hierarchy based on the lowest level of significant input used to measure fair value. Assets and liabilities may change levels within the fair value hierarchy due to market conditions or other circumstances. Those transfers are recognized on the date of the event that prompted the transfer. There were no transfers of assets or liabilities required to be measured at fair value on a recurring basis between levels of the fair value hierarchy during the periods presented. Assets and Liabilities Required to be Measured and Reported at Fair Value on a Recurring Basis The following table provides the fair value for assets and liabilities required to be measured and reported at fair value on a recurring basis on the Consolidated Balance Sheets by level in the fair value hierarchy. Recurring Fair Value Measurements at Reporting Date December 31, 2018 December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Available-for-sale investment securities: Obligations of: States and political subdivisions $ — $ 88,587 $ — $ — $ 101,569 $ — Residential mortgage-backed securities — 692,608 — — 673,664 — Commercial mortgage-backed securities — 6,707 — — 6,976 — Bank-issued trust preferred securities — 3,989 — — 5,129 — Equity investment securities (a) — — — 7,694 155 — Total available-for-sale securities $ — $ 791,891 $ — $ 7,694 $ 787,493 $ — Equity investment securities (a) $ 94 $ 183 $ — $ — $ — $ — Derivative assets (b) — 4,544 — — 4,594 — Liabilities: Derivative liabilities (c) $ — $ 3,562 $ — $ — $ 3,241 $ — (a) As of January 1, 2018, Peoples adopted ASU 2016-01, resulting in the reclassification of equity investment securities from available-for-sale investment securities to other investment securities. As of December 31, 2017, equity investment securities had a net unrealized gain of $6.5 million . (b) Included in other assets on the Consolidated Balance Sheets. For additional information, see Note 14 Derivative Financial Instruments. (c) Included in other liabilities on the Consolidated Balance Sheets. For additional information, see Note 14 Derivative Financial Instruments. Available-for-Sale Investment Securities: The fair values used by Peoples are obtained from an independent pricing service and represent either quoted market prices for the identical securities (Level 1) or fair values determined by pricing models using a market approach that considers observable market data, such as interest rate volatility, LIBOR yield curves, credit spreads and prices from market makers and live trading systems (Level 2). Management reviews the valuation methodology and quality controls utilized by the pricing services in management's overall assessment of the reasonableness of the fair values provided, and challenges prices when management believes a material discrepancy in pricing exists. Equity Investment Securities: The fair values of Peoples' equity investment securities are obtained from q uoted prices in active exchange markets for identical assets or liabilities (Level 1) or quoted prices in less active markets (Level 2). Derivative Assets and Liabilities : Derivative assets and liabilities are recognized on the Consolidated Balance Sheets at their fair value within other assets/liabilities. The fair value for derivative instruments is determined based on market prices, broker-dealer quotations on similar products, or other related input parameters (Level 2). Assets and Liabilities Required to be Measured and Reported at Fair Value on a Non-Recurring Basis The following table provides the fair value for each class of assets and liabilities required to be measured and reported at fair value on a non-recurring basis on the Consolidated Balance Sheets by level in the fair value hierarchy. Non-Recurring Fair Value Measurements at Reporting Date December 31, 2018 December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Impaired loans $ — $ — $ 24,129 $ — $ — $ 20,602 OREO — — 94 — — 208 Impaired Loans: Impaired loans are measured and reported at fair value when the amounts to be received are less than the carrying value of the loans. One of the allowable methods for determining the amount of impairment is estimating fair value using the fair value of the collateral for collateral-dependent loans. Management’s determination of the fair value for these loans uses a market approach representing the estimated net proceeds to be received from the sale of the collateral based on observable market prices or the market value provided by independent, licensed or certified appraisers (Level 3), less estimated selling costs. At December 31, 2018 , impaired loans with an aggregate outstanding principal balance of $30.1 million were measured and reported at a fair value of $ 24.1 million . For the year ended December 31, 2018 , Peoples recognized a reduction of $ 207,000 in the specific reserve on impaired loans, through the allowance for loan losses. Other Real Estate Owned: The carrying value of OREO is not re-measured to fair value on a recurring basis, but is based on recent real estate appraisals and is updated at least annually. These appraisals may utilize a single valuation approach or a combination of approaches including the comparable sales approach and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available (Level 3). Financial Instruments Not Required to be Measured and Reported at Fair Value The following table provides the carrying amount for each class of assets and liabilities, and the fair value for certain financial instruments that are not required to be measured or reported at fair value on the Consolidated Balance Sheets. Fair Value Measurements of Other Financial Instruments (Dollars in thousands) Fair Value Hierarchy Level December 31, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value Assets: Cash and cash equivalents 1 $ 77,612 $ 77,612 $ 72,194 $ 72,194 Held-to-maturity investment securities: Obligations of: States and political subdivisions 2 4,403 4,896 3,810 4,417 Residential mortgage-backed securities 2 29,044 28,603 32,487 32,227 Commercial mortgage-backed securities 2 3,514 3,464 4,631 4,569 Total held-to-maturity securities 36,961 36,963 40,928 41,213 Other investment securities: FHLB stock 2 29,367 29,367 28,132 28,132 FRB stock 2 12,294 12,294 10,179 10,179 Nonqualified deferred compensation (a) 2 987 987 — — Federal Home Loan Mortgage Corp ("FHLMC") stock 2 60 60 60 60 Other investment securities (b) 42,708 42,708 38,371 38,371 Net loans 3 2,708,583 2,907,537 2,338,344 2,274,194 Loans held for sale 2 5,470 5,492 2,510 2,569 Bank owned life insurance 3 68,934 68,934 62,176 62,176 Servicing rights (c) 3 2,655 4,568 2,305 3,866 Financial liabilities: Deposits 2 $ 2,955,465 $ 2,953,452 $ 2,730,330 $ 2,730,071 Short-term borrowings 2 356,198 349,994 209,491 209,628 Long-term borrowings 2 109,644 101,736 144,019 142,108 (a) As of January 1, 2018, Peoples adopted ASU 2016-01, resulting in the reclassification of equity investment securities (including those held in participant accounts in the Peoples Bancorp Inc. Nonqualified Deferred Compensation Plan) from available-for-sale investment securities to other investment securities. (b) Other investment securities, as reported on the Consolidated Balance Sheets, also includes equity investment securities for 2018, which are reported in the Assets and Liabilities Required to be Measured and Reported at Fair Value on a Recurring Basis table above. (c) Included in other intangible assets on the Consolidated Balance Sheets. Servicing rights are carried at the lower of cost or market value. For certain financial assets and liabilities, carrying value approximates fair value due to the nature of the financial instrument. These instruments include cash and cash equivalents, demand and other non-maturity deposits, and overnight borrowings. Peoples used the following methods and assumptions in estimating the fair value of the following financial instruments: Cash and Cash Equivalents: The carrying amount for cash and due from banks is a reasonable estimate of fair value (Level 1). Held-to-Maturity Investment Securities: The fair values used by Peoples are obtained from an independent pricing service and represent either quoted market prices for the identical securities (Level 1) or fair values determined by pricing models using a market approach that considers observable market data, such as interest rate volatility, LIBOR yield curves, credit spreads and prices from market makers and live trading systems (Level 2). Management reviews the valuation methodology and quality controls utilized by the pricing services in management's overall assessment of the reasonableness of the fair values provided, and challenges prices when management believes a material discrepancy in pricing exists. Other Investment Securities: Other investment securities are measured at their respective redemption values (Level 2). Net Loans: The fair value of portfolio loans assumes sale of the notes to a third-party financial investor. Accordingly, this value is not necessarily the value to Peoples if the notes were held to maturity. Peoples considered interest rate, credit and market factors in estimating the fair value of loans (Level 3). 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. Loans Held for Sale: Loans originated and intended to be sold in the secondary market, generally one-to-four family residential loans, are carried, in aggregate, at the lower of cost or estimated fair value. The use of a valuation model using quoted prices of similar instruments are significant inputs in arriving at the fair value (Level 2). Bank Owned Life Insurance: Peoples' bank owned life insurance policies are recorded at their cash surrender value (Level 3). Peoples recognizes tax-exempt income from the periodic increases in the cash surrender value of these policies and from death benefits. Servicing Rights : The fair value of the servicing rights is determined by using a discounted cash flow model, which estimates the present value of the future net cash flows of the servicing portfolio based on various factors, such as servicing costs, expected prepayment speeds and discount rates (Level 3). Deposits: The fair value of fixed maturity certificates of deposit ("CDs") is estimated using a discounted cash flow calculation based on current rates offered for deposits of similar remaining maturities (Level 2). Short-term Borrowings: The fair value of short-term borrowings is estimated using discounted cash flow analysis based on rates currently available to Peoples for borrowings with similar terms (Level 2). Long-term Borrowings: The fair value of long-term borrowings is estimated using a discounted cash flow analysis based on rates currently available to Peoples for borrowings with similar terms (Level 2). Certain financial assets and financial liabilities that are not required to be measured or reported at fair value can be subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). These financial assets and liabilities include the following: customer relationships intangible assets, core deposit intangible assets and other information required to compute Peoples’ aggregate fair value, which are not included in the above information. Accordingly, the above fair values are not intended to represent the aggregate fair value of Peoples.

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2018
Investments [Abstract]
Investment Securities	Investment Securities Available-for-sale The following table summarizes Peoples’ available-for-sale investment securities at December 31: (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value 2018 Obligations of: States and political subdivisions $ 88,358 $ 787 $ (558 ) $ 88,587 Residential mortgage-backed securities 705,289 2,720 (15,401 ) 692,608 Commercial mortgage-backed securities 6,812 — (105 ) 6,707 Bank-issued trust preferred securities 4,196 75 (282 ) 3,989 Total available-for-sale securities $ 804,655 $ 3,582 $ (16,346 ) $ 791,891 2017 Obligations of: States and political subdivisions $ 100,039 $ 1,786 $ (256 ) $ 101,569 Residential mortgage-backed securities 684,100 2,582 (13,018 ) 673,664 Commercial mortgage-backed securities 7,004 11 (39 ) 6,976 Bank-issued trust preferred securities 5,195 141 (207 ) 5,129 Equity investment securities (a) 1,394 6,520 (65 ) 7,849 Total available-for-sale securities $ 797,732 $ 11,040 $ (13,585 ) $ 795,187 (a) As of January 1, 2018, Peoples adopted ASU 2016-01, resulting in the reclassification of equity investment securities from available-for- sale investment securities to other investment securities. The unrealized losses related to residential mortgage-backed securities at December 31, 2018 and 2017 were attributed to changes in market interest rates and spreads since the securities were purchased. The gross gains and gross losses realized by Peoples from sales of available-for-sale securities for the years ended December 31 were as follows: (Dollars in thousands) 2018 2017 2016 Gross gains realized $ 6 $ 2,999 $ 933 Gross losses realized 152 16 3 Net (loss) gain realized $ (146 ) $ 2,983 $ 930 The cost of investment securities sold, and any resulting gain or loss, were based on the specific identification method and recognized as of the trade date. The following table presents a summary of available-for-sale investment securities that had an unrealized loss at December 31: Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Value Unrealized Loss No. of Securities Fair Value Unrealized Loss No. of Securities Fair Value Unrealized Loss 2018 Obligations of: States and political subdivisions $ 10,173 $ 18 17 $ 19,918 $ 540 20 $ 30,091 $ 558 Residential mortgage-backed securities 47,562 226 50 517,335 15,175 170 564,897 15,401 Commercial mortgage-backed securities — — — 6,707 105 3 6,707 105 Bank-issued trust preferred securities — — — 1,718 282 2 1,718 282 Total $ 57,735 $ 244 67 $ 545,678 $ 16,102 195 $ 603,413 $ 16,346 2017 Obligations of: States and political subdivisions $ 16,985 $ 89 18 $ 5,308 $ 167 1 $ 22,293 $ 256 Residential mortgage-backed securities 274,998 3,462 77 291,812 9,556 88 566,810 13,018 Commercial mortgage-backed securities 2,487 23 1 1,274 16 1 3,761 39 Bank-issued trust preferred securities — — — 2,792 207 3 2,792 207 Equity investment securities (a) 276 1 1 112 64 1 388 65 Total $ 294,746 $ 3,575 97 $ 301,298 $ 10,010 94 $ 596,044 $ 13,585 (a) As of January 1, 2018, Peoples adopted ASU 2016-01, resulting in the reclassification of equity investment securities from available-for-sale investment securities to other investment securities. Management systematically evaluates available-for-sale investment securities for other-than-temporary declines in fair value on a quarterly basis. At December 31, 2018 , management concluded no individual securities were other-than-temporarily impaired since Peoples did not have the intent to sell, nor was it more likely than not that Peoples would be required to sell, any of the securities with an unrealized loss prior to recovery. Further, the unrealized losses at both December 31, 2018 and 2017 were attributable to changes in market interest rates and spreads since the securities were purchased. At December 31, 2018 , approximately 99% of the fair value of mortgage-backed securities that had been at an unrealized loss position for twelve months or more were issued by U.S. government sponsored agencies. The remaining 1% , or two positions, consisted of privately issued mortgage-backed securities with all of the underlying mortgages originated prior to 2004. Both of the two positions had a fair value of less than 90% of their book value, with an aggregate book and fair value of $ 216,000 and $145,000 , respectively. Management has analyzed the underlying credit quality of these securities and concluded the unrealized losses were primarily attributable to the floating rate nature of these investments and the low number of loans remaining in these securities. The unrealized losses with respect to the two bank-issued trust preferred securities that had been in an unrealized loss position for twelve months or more at December 31, 2018 were primarily attributable to the subordinated nature of the debt. The table below presents the amortized cost, fair value and total weighted-average yield of available-for-sale securities by contractual maturity at December 31, 2018 . The weighted-average yields are based on the amortized cost. In some cases, the issuers may have the right to call or prepay obligations without call or prepayment penalties prior to the contractual maturity date. (Dollars in thousands) Within 1 Year 1 to 5 Years 5 to 10 Years Over 10 Years Total Amortized cost Obligations of: States and political subdivisions $ 891 $ 15,910 $ 23,094 $ 48,463 $ 88,358 Residential mortgage-backed securities 782 12,194 51,284 641,029 705,289 Commercial mortgage-backed securities — 5,666 — 1,146 6,812 Bank-issued trust preferred securities — — 4,196 — 4,196 Total available-for-sale securities $ 1,673 $ 33,770 $ 78,574 $ 690,638 $ 804,655 Fair value Obligations of: States and political subdivisions $ 888 $ 15,900 $ 23,188 $ 48,611 $ 88,587 Residential mortgage-backed securities 778 12,031 50,164 629,635 692,608 Commercial mortgage-backed securities — 5,587 — 1,120 6,707 Bank-issued trust preferred securities — — 3,989 — 3,989 Total available-for-sale securities $ 1,666 $ 33,518 $ 77,341 $ 679,366 $ 791,891 Total weighted-average yield 2.26 % 2.35 % 2.77 % 2.93 % 2.89 % Held-to-Maturity The following table summarizes Peoples’ held-to-maturity investment securities at December 31: (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value 2018 Obligations of: States and political subdivisions $ 4,403 $ 493 $ — $ 4,896 Residential mortgage-backed securities 29,044 191 (632 ) 28,603 Commercial mortgage-backed securities 3,514 — (50 ) 3,464 Total held-to-maturity securities $ 36,961 $ 684 $ (682 ) $ 36,963 2017 Obligations of: States and political subdivisions $ 3,810 $ 607 $ — $ 4,417 Residential mortgage-backed securities 32,487 269 (529 ) 32,227 Commercial mortgage-backed securities 4,631 — (62 ) 4,569 Total held-to-maturity securities $ 40,928 $ 876 $ (591 ) $ 41,213 There were no gross gains or gross losses realized by Peoples from sales of held-to-maturity securities for the years ended December 31, 2018 , 2017 and 2016. The following table presents a summary of held-to-maturity investment securities that had an unrealized loss at December 31: Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Value Unrealized Loss No. of Securities Fair Value Unrealized Loss No. of Securities Fair Value Unrealized Loss 2018 Residential mortgage-backed securities $ — $ — — $ 13,102 $ 632 5 $ 13,102 $ 632 Commercial mortgage-backed securities — — — 3,464 50 1 3,464 50 Total $ — $ — — $ 16,566 $ 682 6 $ 16,566 $ 682 2017 Residential mortgage-backed securities $ 1,476 $ 4 2 $ 12,098 $ 525 3 $ 13,574 $ 529 Commercial mortgage-backed securities — — — 4,569 62 1 4,569 62 Total $ 1,476 $ 4 2 $ 16,667 $ 587 4 $ 18,143 $ 591 The table below presents the amortized cost, fair value and total weighted-average yield of held-to-maturity securities by contractual maturity at December 31, 2018 . The weighted-average yields are based on the amortized cost. In some cases, the issuers may have the right to call or prepay obligations without call or prepayment penalties prior to the contractual maturity date. (Dollars in thousands) Within 1 Year 1 to 5 Years 5 to 10 Years Over 10 Years Total Amortized cost Obligations of: States and political subdivisions $ — $ 308 $ 2,982 $ 1,113 $ 4,403 Residential mortgage-backed securities — 422 8,027 20,595 29,044 Commercial mortgage-backed securities — — — 3,514 3,514 Total held-to-maturity securities $ — $ 730 $ 11,009 $ 25,222 $ 36,961 Fair value Obligations of: States and political subdivisions $ — $ 308 $ 3,466 $ 1,122 $ 4,896 Residential mortgage-backed securities — 416 8,163 20,024 28,603 Commercial mortgage-backed securities — — — 3,464 3,464 Total held-to-maturity securities $ — $ 724 $ 11,629 $ 24,610 $ 36,963 Total weighted-average yield — % 2.43 % 2.89 % 2.78 % 2.80 % Other Investment Securities Peoples' other investment securities on the Consolidated Balance Sheet consist largely of shares of FHLB and FRB, and equity investment securities. As of January 1, 2018, Peoples adopted ASU 2016-01, resulting in the reclassification of $7.8 million of equity investment securities from available-for-sale investment securities to other investment securities and the reclassification of $5.0 million in net unrealized gains on equity investment securities from accumulated other comprehensive loss to retained earnings. The following table summarizes the carrying value of Peoples' other investment securities at December 31: (Dollars in thousands) 2018 2017 FHLB stock $ 29,367 $ 28,132 FRB stock 12,294 10,179 Nonqualified deferred compensation 987 — Equity investment securities (a) 277 — FHLMC stock 60 60 Other investment securities $ 42,985 $ 38,371 (a) As of January 1, 2018, Peoples adopted ASU 2016-01, resulting in the reclassification of equity investment securities from available-for-sale investment securities to other investment securitie s. During the year ended December 31, 2018 , Peoples recorded the change in the fair value of equity investment securities held at December 31, 2018 in other non-interest income, resulting in unrealized losses of $206,000 . At December 31, 2018 , Peoples' investment in equity investment securities was comprised largely of common stocks issued by various unrelated bank holding companies. There were no equity investment securities of a single issuer that exceeded 10% of Peoples' stockholders' equity. Pledged Securities Peoples had pledged available-for-sale investment securities with a carrying value of $ 430.0 million and $ 522.7 million at December 31, 2018 and 2017 , respectively, and held-to-maturity investment securities with a carrying value of $ 16.9 million and $ 18.3 million at December 31, 2018 and 2017 , respectively, to secure public and trust department deposits and Repurchase Agreements in accordance with federal and state requirements. Peoples also pledged available-for-sale investment securities with carrying values of $ 60.1 million and $ 6.7 million at December 31, 2018 and 2017 , respectively, and held-to-maturity securities with carrying values of $16.7 million and $19.9 million at December 31, 2018 and 2017 , respectively, to secure additional borrowing capacity at the FHLB and the FRB.

Loans

Loans	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans	Loans Peoples' loan portfolio consists of various types of loans originated primarily as a result of lending opportunities within Peoples' primary market areas of northeastern, central, southwestern and southeastern Ohio, west central West Virginia, and eastern Kentucky. Acquired loans consist of loans purchased in 2012 or thereafter. Loans that were acquired and subsequently re-underwritten, are reported as originated upon execution of such credit actions (for example, renewals and increases in lines of credit). The major classifications of loan balances (in each case, net of deferred fees and costs), excluding loans held for sale, were as follows at December 31: (Dollars in thousands) 2018 2017 Originated loans: Commercial real estate, construction $ 124,013 $ 107,118 Commercial real estate, other 632,200 595,447 Commercial real estate 756,213 702,565 Commercial and industrial 530,207 438,051 Residential real estate 296,860 304,523 Home equity lines of credit 93,326 88,902 Consumer, indirect 407,167 340,390 Consumer, direct 71,674 67,010 Consumer 478,841 407,400 Deposit account overdrafts 583 849 Total originated loans $ 2,156,030 $ 1,942,290 Acquired loans: Commercial real estate, construction $ 12,404 $ 8,319 Commercial real estate, other 184,711 165,120 Commercial real estate 197,115 173,439 Commercial and industrial 35,537 34,493 Residential real estate 296,937 184,864 Home equity lines of credit 40,653 20,575 Consumer, indirect 136 329 Consumer, direct 2,370 1,147 Consumer 2,506 1,476 Total acquired loans $ 572,748 $ 414,847 Total loans $ 2,728,778 $ 2,357,137 Peoples has acquired various loans through business combinations for which there was, at acquisition, evidence of deterioration of credit quality since origination, and for which it was probable that all contractually required payments would not be collected. The carrying amounts of these purchased credit impaired loans included in the loan balances above are summarized as follows at December 31: (Dollars in thousands) 2018 2017 Commercial real estate $ 11,955 $ 8,117 Commercial and industrial 1,287 767 Residential real estate 20,062 19,532 Consumer 58 33 Total outstanding balance $ 33,362 $ 28,449 Net carrying amount $ 22,475 $ 19,564 Changes in the accretable yield for purchased credit impaired loans during the year ended December 31 were as follows: (Dollars in thousands) 2018 2017 Balance, beginning of period $ 6,704 $ 7,132 Reclassification from nonaccretable to accretable 2,019 1,285 Additions: ASB 2,047 — Accretion (1,815 ) (1,713 ) Balance, December 31 $ 8,955 $ 6,704 Peoples completes annual re-estimations of cash flows on acquired purchased credit impaired loans in August of each year. At the end of each quarter, Peoples evaluates factors to determine if a material change has occurred in acquired loans accounted for and if a re-estimation is needed. Factors evaluated to determine if a re-estimation is needed include changes in: risk ratings, maturity dates, charge-offs, payoffs, nonaccrual status and loans that have become past due. Prepayments affect the estimated life of the loans and could change the amount of interest income, and possibly the amount of principal, expected to be collected. In reforecasting future estimated cash flows, credit loss expectations are adjusted as necessary. Peoples evaluates changes quarterly and compares the new estimated cash flows to those at the previous cash flow re-estimation date and the related materiality of the changes, and when compared to the total loan portfolio, the differences in estimated cash flows at the most recent cash flow re-estimation date compared to the previous cash flow re-estimation date would not have a material impact on amounts recorded since the last re-estimation. Peoples completed a re-estimation of cash flows on purchased credit impaired loans in August 2018, resulting in the reclassification from nonaccretable to accretable yield shown in the table above. Cash flows expected to be collected on purchased credit impaired loans are estimated by incorporating several key assumptions similar to those used in the initial estimate of fair value. These key assumptions include probability of default, and the amount of actual prepayments after the acquisition date. In reforecasting future estimated cash flows, credit loss expectations are adjusted as necessary. Pledged Loans Peoples has pledged certain loans secured by one-to-four family and multifamily residential mortgages under a blanket collateral agreement to secure borrowings from the FHLB. The amount of such pledged loans totaled $ 505.7 million and $ 487.2 million at December 31, 2018 and 2017 , respectively. Peoples also had pledged commercial loans to secure borrowings with the FRB. The outstanding balances of these loans totaled $ 180.9 million and $ 74.0 million at December 31, 2018 and 2017 , respectively. Related Party Loans In the normal course of its business, Peoples Bank has granted loans to certain directors and officers of Peoples Bancorp Inc., including their affiliates, families and entities in which they are principal owners. At December 31, 2018 , no related party loan was past due 90 or more days, renegotiated or on nonaccrual status. Activity in related party loans is presented in the table below. Other changes primarily consist of changes in related party status, and the addition and exit of directors during the year, as applicable. (Dollars in thousands) Balance, December 31, 2017 $ 15,102 New loans and disbursements 5,508 Repayments (3,720 ) Other changes (101 ) Balance, December 31, 2018 $ 16,789 Nonaccrual and Past Due Loans A loan is considered past due if any required principal and interest payments have not been received as of the date such payments were required to be made under the terms of the loan agreement. A loan may be placed on nonaccrual status regardless of whether or not such loan is considered past due. The recorded investments in loans on nonaccrual status and loans delinquent for 90 days or more and accruing were as follows at December 31: Accruing Loans 90+ Days Past Due Nonaccrual Loans (Dollars in thousands) 2018 2017 2018 2017 Originated loans: Commercial real estate, construction $ 710 $ 754 $ — $ — Commercial real estate, other 6,565 6,877 786 — Commercial real estate 7,275 7,631 786 — Commercial and industrial 1,673 739 — — Residential real estate 4,105 3,546 398 548 Home equity lines of credit 596 550 7 50 Consumer, indirect 480 256 — — Consumer, direct 56 39 — 16 Consumer 536 295 — 16 Total originated loans $ 14,185 $ 12,761 $ 1,191 $ 614 Acquired loans: Commercial real estate, other $ 319 $ 192 $ 15 $ 215 Commercial and industrial 36 259 18 45 Residential real estate 1,921 2,168 1,032 730 Home equity lines of credit 637 312 — 22 Total acquired loans $ 2,913 $ 2,931 $ 1,065 $ 1,012 Total loans $ 17,098 $ 15,692 $ 2,256 $ 1,626 The following tables present the aging of the recorded investment in past due loans at December 31: Loans Past Due Current Total (Dollars in thousands) 30 - 59 days 60 - 89 days 90 + Days Total 2018 Originated loans: Commercial real estate, construction $ — $ — $ 710 $ 710 $ 123,303 $ 124,013 Commercial real estate, other 12 736 7,151 7,899 624,301 632,200 Commercial real estate 12 736 7,861 8,609 747,604 756,213 Commercial and industrial 1,678 3,520 1,297 6,495 523,712 530,207 Residential real estate 4,457 1,319 2,595 8,371 288,489 296,860 Home equity lines of credit 531 30 431 992 92,334 93,326 Consumer, indirect 3,266 488 165 3,919 403,248 407,167 Consumer, direct 308 50 42 400 71,274 71,674 Consumer 3,574 538 207 4,319 474,522 478,841 Deposit account overdrafts — — — — 583 583 Total originated loans $ 10,252 $ 6,143 $ 12,391 $ 28,786 $ 2,127,244 $ 2,156,030 Loans Past Due Current Total (Dollars in thousands) 30 - 59 days 60 - 89 days 90 + Days Total 2018 Acquired loans: Commercial real estate, construction $ 511 $ — $ — $ 511 $ 11,893 $ 12,404 Commercial real estate, other 523 457 233 1,213 183,498 184,711 Commercial real estate 1,034 457 233 1,724 195,391 197,115 Commercial and industrial 111 13 18 142 35,395 35,537 Residential real estate 6,124 1,823 1,885 9,832 287,105 296,937 Home equity lines of credit 238 233 534 1,005 39,648 40,653 Consumer, indirect — — — — 136 136 Consumer, direct 23 6 — 29 2,341 2,370 Consumer 23 6 — 29 2,477 2,506 Total acquired loans $ 7,530 $ 2,532 $ 2,670 $ 12,732 $ 560,016 $ 572,748 Total loans $ 17,782 $ 8,675 $ 15,061 $ 41,518 $ 2,687,260 $ 2,728,778 2017 Originated loans: Commercial real estate, construction $ — $ — $ — $ — $ 107,118 $ 107,118 Commercial real estate, other 990 — 6,492 7,482 587,965 595,447 Commercial real estate 990 — 6,492 7,482 695,083 702,565 Commercial and industrial 1,423 92 706 2,221 435,830 438,051 Residential real estate 4,562 1,234 2,408 8,204 296,319 304,523 Home equity lines of credit 502 80 395 977 87,925 88,902 Consumer, indirect 2,153 648 105 2,906 337,484 340,390 Consumer, direct 417 46 48 511 66,499 67,010 Consumer 2,570 694 153 3,417 403,983 407,400 Deposit account overdrafts — — — — 849 849 Total originated loans $ 10,047 $ 2,100 $ 10,154 $ 22,301 $ 1,919,989 $ 1,942,290 Acquired loans: Commercial real estate, construction $ — $ — $ — $ — $ 8,319 $ 8,319 Commercial real estate, other 775 948 312 2,035 163,085 165,120 Commercial real estate 775 948 312 2,035 171,404 173,439 Commercial and industrial — 1 171 172 34,321 34,493 Residential real estate 4,656 1,391 1,910 7,957 176,907 184,864 Home equity lines of credit 126 — 301 427 20,148 20,575 Consumer, indirect 3 — — 3 326 329 Consumer, direct 10 11 — 21 1,126 1,147 Consumer 13 11 — 24 1,452 1,476 Total acquired loans $ 5,570 $ 2,351 $ 2,694 $ 10,615 $ 404,232 $ 414,847 Total loans $ 15,617 $ 4,451 $ 12,848 $ 32,916 $ 2,324,221 $ 2,357,137 Delinquency trends remained stable as 98.5% of Peoples' portfolio was considered "current" at December 31, 2018 , compared to 98.6% at December 31, 2017 . Credit Quality Indicators As discussed in Note 1 Summary of Significant Accounting Policies, Peoples categorizes the majority of its loans into risk categories based upon an established risk grading matrix using a scale of 1 to 8. A description of the general characteristics of the risk grades used by Peoples is as follows: "Pass" (grades 1 through 4): Loans in this risk category involve borrowers of acceptable-to-strong credit quality and risk who have the apparent ability to satisfy their loan obligations. Loans in this risk category would possess sufficient mitigating factors, such as adequate collateral or strong guarantors possessing the capacity to repay the loans if required, for any weakness that may exist. "Special Mention" (grade 5): Loans in this risk category are the equivalent of the regulatory "Other Assets Especially Mentioned" classification. Loans in this risk category possess some credit deficiency or potential weakness, which requires a high level of management attention. Potential weaknesses include declining trends in operating earnings and cash flows and/or reliance on the secondary source of repayment. If left uncorrected, these potential weaknesses may result in noticeable deterioration of the repayment prospects for the loans or in Peoples' credit position. "Substandard" (grade 6): Loans in this risk category are inadequately protected by the borrower's current financial condition and payment capability, or by the collateral pledged, if any. Loans so classified have one or more well-defined weaknesses that jeopardize the orderly repayment of the loans. They are characterized by the distinct possibility that Peoples will sustain some loss if the deficiencies are not corrected. "Doubtful" (grade 7): Loans in this risk category have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or orderly repayment in full, on the basis of current existing facts, conditions and values, highly questionable and improbable. Possibility of loss is extremely high, but because of certain important and reasonably specific factors that may work to the advantage and strengthening of the exposure, classification of these loans as an estimate loss is deferred until their more exact status may be determined. "Loss" (grade 8): Loans in this risk category are considered to be non-collectible and of such little value that their continuance as bankable assets is not warranted. This does not mean each such loan has absolutely no recovery value, but rather it is neither practical nor desirable to defer writing off the loan, even though partial recovery may be obtained in the future. Charge-offs against the allowance for loan losses are taken in the period in which the loan becomes uncollectible. Consequently, Peoples typically does not maintain a recorded investment in loans within this risk category. Consumer loans and other smaller-balance loans are evaluated and categorized as "substandard," "doubtful" or "loss" based upon the regulatory definition of these classes and consistent with regulatory requirements. All other loans not evaluated individually, nor meeting the regulatory conditions to be categorized as described above, would be considered as being "not rated." The following tables summarize the risk category of Peoples' loan portfolio based upon the most recent analysis performed at December 31: Pass Rated Special Mention Substandard Doubtful Not Rated Total (Dollars in thousands) (Grades 1 - 4) (Grade 5) (Grade 6) (Grade 7) 2018 Originated loans: Commercial real estate, construction $ 121,457 $ — $ 1,472 $ — $ 1,084 $ 124,013 Commercial real estate, other 612,099 10,898 9,203 — — 632,200 Commercial real estate 733,556 10,898 10,675 — 1,084 756,213 Commercial and industrial 476,290 45,990 7,692 — 235 530,207 Residential real estate 14,229 500 11,971 409 269,751 296,860 Home equity lines of credit 453 — — — 92,873 93,326 Consumer, indirect 8 — — — 407,159 407,167 Consumer, direct 30 — — — 71,644 71,674 Consumer 38 — — — 478,803 478,841 Deposit account overdrafts — — — — 583 583 Total originated loans $ 1,224,566 $ 57,388 $ 30,338 $ 409 $ 843,329 $ 2,156,030 Pass Rated Special Mention Substandard Doubtful Not Rated Total (Dollars in thousands) (Grades 1 - 4) (Grade 5) (Grade 6) (Grade 7) 2018 Acquired loans: Commercial real estate, construction $ 8,976 $ 1,795 $ 1,633 $ — $ — $ 12,404 Commercial real estate, other 169,260 7,241 8,114 96 — 184,711 Commercial real estate 178,236 9,036 9,747 96 — 197,115 Commercial and industrial 32,471 2,008 1,058 — — 35,537 Residential real estate 17,370 1,938 2,033 137 275,459 296,937 Home equity lines of credit 33 — — — 40,620 40,653 Consumer, indirect 4 — — — 132 136 Consumer, direct 31 — — — 2,339 2,370 Consumer 35 — — — 2,471 2,506 Total acquired loans $ 228,145 $ 12,982 $ 12,838 $ 233 $ 318,550 $ 572,748 Total loans $ 1,452,711 $ 70,370 $ 43,176 $ 642 $ 1,161,879 $ 2,728,778 2017 Originated loans: Commercial real estate, construction $ 100,409 $ 5,502 $ 754 $ — $ 453 $ 107,118 Commercial real estate, other 561,320 17,189 16,938 — — 595,447 Commercial real estate 661,729 22,691 17,692 — 453 702,565 Commercial and industrial 420,477 13,062 4,512 — — 438,051 Residential real estate 17,896 1,000 11,371 216 274,040 304,523 Home equity lines of credit 454 — — — 88,448 88,902 Consumer, indirect 55 8 — — 340,327 340,390 Consumer, direct 33 — — — 66,977 67,010 Consumer 88 8 — — 407,304 407,400 Deposit account overdrafts — — — — 849 849 Total originated loans $ 1,100,644 $ 36,761 $ 33,575 $ 216 $ 771,094 $ 1,942,290 Acquired loans: Commercial real estate, construction $ 8,267 $ — $ 52 $ — $ — $ 8,319 Commercial real estate, other 149,486 6,527 9,107 — — 165,120 Commercial real estate 157,753 6,527 9,159 — — 173,439 Commercial and industrial 32,011 157 2,325 — — 34,493 Residential real estate 12,543 593 1,105 — 170,623 184,864 Home equity lines of credit 124 — — — 20,451 20,575 Consumer, indirect 12 — — — 317 329 Consumer, direct 35 — — — 1,112 1,147 Consumer 47 — — — 1,429 1,476 Total acquired loans $ 202,478 $ 7,277 $ 12,589 $ — $ 192,503 $ 414,847 Total loans $ 1,303,122 $ 44,038 $ 46,164 $ 216 $ 963,597 $ 2,357,137 During 2018, Peoples' classified loans, which are loans categorized as substandard or doubtful, declined compared to the balances at December 31, 2017 mostly due to paydowns on classified loans, which were partially offset by acquired ASB loans. Impaired Loans The following table summarizes loans classified as impaired at December 31: Unpaid Principal Balance Recorded Investment Total Recorded Investment Average Recorded Investment Interest Income Recognized With Without Related Allowance (Dollars in thousands) Allowance Allowance 2018 Commercial real estate, construction $ 2,376 $ — $ 2,376 $ 2,376 $ — $ 1,732 $ 74 Commercial real estate, other 15,464 274 14,946 15,220 119 14,043 455 Commercial real estate 17,840 274 17,322 17,596 119 15,775 529 Commercial and industrial 3,305 790 2,436 3,226 157 2,423 72 Residential real estate 25,990 644 24,034 24,678 154 22,769 1,134 Home equity lines of credit 2,291 424 1,869 2,293 73 1,832 109 Consumer, indirect 496 — 503 503 — 278 15 Consumer, direct 79 22 57 79 6 63 20 Consumer 575 22 560 582 6 341 35 Total $ 50,001 $ 2,154 $ 46,221 $ 48,375 $ 509 $ 43,140 $ 1,879 2017 Commercial real estate, construction $ 821 $ — $ 754 754 $ — $ 788 $ — Commercial real estate, other 14,909 14 13,606 13,620 1 14,392 503 Commercial real estate 15,730 14 14,360 14,374 1 15,180 503 Commercial and industrial 1,690 951 572 1,523 199 1,668 65 Residential real estate 24,743 477 22,626 23,103 58 23,195 1,246 Home equity lines of credit 1,707 81 1,624 1,705 18 1,505 85 Consumer, indirect 273 70 206 276 26 184 20 Consumer, direct 87 56 28 84 37 79 7 Consumer 360 126 234 360 63 263 27 Total $ 44,230 $ 1,649 $ 39,416 $ 41,065 $ 339 $ 41,811 $ 1,926 Peoples' loans classified as impaired shown in the table above, included loans that were classified as TDRs. The following table summarizes the loans that were modified as TDRs during the years ended December 31, 2018 and 2017 . Recorded Investment (1) (Dollars in thousands) Number of Contracts Pre-Modification Post-Modification Remaining Recorded Investment 2018 Originated loans: Commercial and industrial 1 $ 714 $ 714 $ 714 Residential real estate 9 904 904 899 Home equity lines of credit 8 666 666 660 Consumer, indirect 27 485 485 412 Consumer, direct 5 32 32 29 Consumer 32 517 517 441 Total 50 $ 2,801 $ 2,801 $ 2,714 Acquired loans: Commercial real estate, construction 1 $ 50 $ 50 $ 45 Residential real estate 15 1,258 1,258 1,226 Home equity lines of credit 6 196 196 193 Total 22 $ 1,504 $ 1,504 $ 1,464 2017 Originated loans: Commercial real estate, other 1 $ 14 $ 14 $ 14 Commercial and industrial 4 210 210 149 Residential real estate 7 483 483 473 Home equity lines of credit 6 296 296 289 Consumer, indirect 15 218 218 201 Consumer, direct 2 10 10 8 Consumer 17 228 228 209 Total 35 $ 1,231 $ 1,231 $ 1,134 Acquired loans: Commercial real estate, construction 3 $ 288 $ 288 $ 280 Residential real estate 9 442 442 412 Home equity lines of credit 5 328 328 320 Consumer, direct 1 2 2 — Total 18 $ 1,060 $ 1,060 $ 1,012 (1) The amounts shown are inclusive of all partial paydowns and charge-offs. Loans modified in a TDR that were fully paid down, charged-off or foreclosed upon by period end are not reported. The following table presents those loans modified into a TDR during the year that subsequently defaulted (i.e., 90 days or more past due following a modification) during the years ended December 31: 2018 2017 (Dollars in thousands) Number of Contracts Recorded Investment (1) Impact on the Allowance for Loan Losses Number of Contracts Recorded Investment (1) Impact on the Allowance for Loan Losses Originated loans: Residential real estate 1 $ 56 $ — — $ — $ — Home equity lines of credit 1 32 — — — — Total 2 $ 88 $ — — $ — $ — Acquired loans: Residential real estate — $ — $ — 2 $ 64 $ — Home equity lines of credit 1 10 — — — — Total 1 $ 10 $ — 2 $ 64 $ — (1) The amounts shown are inclusive of all partial paydowns and charge-offs. Loans modified in a TDR that were fully paid down, charged-off or foreclosed upon by period end are not reported. Peoples had no commitments to lend additional funds to the related borrowers whose loan terms have been modified in a TDR. Allowance for Loan Losses Changes in the allowance for loan losses in the periods ended December 31 were as follows: (Dollars in thousands) Commercial Real Estate Commercial and Industrial Residential Real Estate Home Equity Lines of Credit Consumer, indirect Consumer, direct Deposit Account Overdrafts Total Balance, January 1, 2018 $ 7,797 $ 5,813 $ 904 $ 693 $ 2,944 $ 464 $ 70 $ 18,685 Charge-offs (849 ) (38 ) (355 ) (107 ) (2,515 ) (358 ) (965 ) (5,187 ) Recoveries 60 18 232 14 474 140 205 1,143 Net charge-offs (789 ) (20 ) (123 ) (93 ) (2,041 ) (218 ) (760 ) (4,044 ) Provision for loan losses 995 385 433 18 2,311 105 771 5,018 Balance, December 31, 2018 $ 8,003 $ 6,178 $ 1,214 $ 618 $ 3,214 $ 351 $ 81 $ 19,659 Period-end amount allocated to: Loans individually evaluated for impairment $ 119 $ 157 $ 154 $ 73 $ — $ 6 $ — $ 509 Loans collectively evaluated for impairment 7,884 6,021 1,060 545 3,214 345 81 19,150 Balance, December 31, 2018 $ 8,003 $ 6,178 $ 1,214 $ 618 $ 3,214 $ 351 $ 81 $ 19,659 Balance, January 1, 2017 $ 7,172 $ 6,353 $ 982 $ 688 $ 2,312 $ 518 $ 171 $ 18,196 Charge-offs (408 ) (175 ) (637 ) (131 ) (2,110 ) (372 ) (1,038 ) (4,871 ) Recoveries 146 1 152 13 764 179 215 1,470 Net charge-offs (262 ) (174 ) (485 ) (118 ) (1,346 ) (193 ) (823 ) (3,401 ) Provision for (recovery of) loan losses 887 (366 ) 407 123 1,978 139 722 3,890 Balance, December 31, 2017 $ 7,797 $ 5,813 $ 904 $ 693 $ 2,944 $ 464 $ 70 $ 18,685 Period-end amount allocated to: Loans individually evaluated for impairment $ 1 $ 199 $ 58 $ 18 $ 26 $ 37 $ — $ 339 Loans collectively evaluated for impairment 7,796 5,614 846 675 2,918 427 70 18,346 Balance, December 31, 2017 $ 7,797 $ 5,813 $ 904 $ 693 $ 2,944 $ 464 $ 70 $ 18,685 The increase in total allowance for loan losses in 2018 was primarily due to total loan growth of 16% , or $371.6 million . The increase was primarily the result of commercial loan growth of $170.5 million , or 13% , which includes commercial real estate and commercial and industrial loan balances. Additionally, indirect consumer lending had growth of $66.6 million , or 20% , compared to December 31, 2017, and was partially offset by reductions in residential real estate loans. Historical loss rates are calculated using charge-offs and recoveries within each portfolio over the past five years. Allowance for Acquired Loan Losses Acquired loans are recorded at their fair value as of the acquisition date with no valuation allowance, and monitored for changes in credit quality and subsequent increases or decreases in expected cash flows. Decreases in expected cash flows of acquired purchased credit impaired loans are recognized as an impairment, with the amount of the expected loss included in management's evaluation of the appropriateness of the allowance for loan losses. The methods utilized to estimate the required allowance for loan losses for nonimpaired acquired loans are similar to those utilized for originated loans; however, Peoples records a provision for loan losses only when the computed allowance for loan losses exceeds the remaining fair value adjustment. The following table presents activity in the allowance for loan losses for acquired loans as of December 31: (Dollars in thousands) 2018 2017 Nonimpaired loans: Balance, January 1 $ — $ — Provision for loan losses 383 — Balance, December 31 $ 383 $ — Purchased credit impaired loans: Balance, January 1 $ 108 $ 233 Charge-offs (2 ) (7 ) Provision for (recovery of) loan losses 47 (118 ) Balance, December 31 $ 153 $ 108 During 2018, as a result of the ASB acquisition, Peoples recorded provision for loan losses for nonimpaired loans. The remaining fair value adjustment recorded for the nonimpaired loans acquired from ASB was not sufficient based on the calculation of the allowance for loan losses as of December 31, 2018. During 2017, Peoples recognized a recovery of loan losses that was related to an acquired purchased credit impaired loan that was paid off.

Bank Premises and Equipment

Bank Premises and Equipment	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Bank Premises and Equipment	Bank Premises and Equipment The major categories of bank premises and equipment, net of accumulated depreciation, at December 31 are summarized as follows: (Dollars in thousands) 2018 2017 Land $ 13,776 $ 12,871 Building and premises 68,245 61,729 Furniture, fixtures and equipment 28,523 27,137 Total bank premises and equipment 110,544 101,737 Accumulated depreciation (54,002 ) (49,227 ) Net book value $ 56,542 $ 52,510 Peoples depreciates its building and premises, and furniture, fixtures and equipment over estimated useful lives generally ranging from 5 to 40 years and 2 to 10 years, respectively. Depreciation expense was $ 4.9 million in 2018 and 2017 and $ 5.1 million in 2016 . Leases Peoples leases certain banking facilities and equipment under various agreements with original terms providing for fixed monthly payments over periods generally ranging from two to ten years. Certain leases contain renewal options and rent escalation clauses calling for rent increases over the term of the lease. All leases which contain a rent escalation clause are accounted for on a straight-line basis. Rent expense on the leased properties and equipment was $ 1.2 million in 2018 , $1.1 million in both 2017 and 2016 . The future minimum payments under noncancellable operating leases with initial or remaining terms of one year or more consisted of the following at December 31, 2018 : (Dollars in thousands) Payments 2019 $ 975 2020 756 2021 606 2022 455 2023 295 Thereafter 223 Total future operating lease payments $ 3,310

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Other Intangible Assets [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The following table details changes in the recorded amount of goodwill for the years ended December 31 : (Dollars in thousands) 2018 2017 Goodwill, beginning of year $ 133,111 $ 132,631 Goodwill recorded from acquisitions 18,134 480 Goodwill, end of year $ 151,245 $ 133,111 Peoples performed the required annual goodwill impairment test as of October 1, 2018, and concluded there was no impairment in the recorded value of goodwill, based upon the estimated fair value of the single reporting unit. During the annual goodwill impairment test, Peoples assessed qualitative factors, including relevant events and circumstances, to determine that it was more likely than not that the fair value of the reporting unit exceeded the carrying value. On April 13, 2018, Peoples completed its acquisition of ASB, for which Peoples recorded $18.1 million of goodwill. For additional information on the ASB acquisition, refer to Note 19 Acquisitions. During 2017, Peoples Insurance Agency, LLC acquired a third-party insurance administration company, for which no goodwill was recorded, and a property and casualty focused independent insurance agency for which Peoples recorded $480,000 of goodwill. Other intangible assets Other intangible assets were comprised of the following at December 31: (Dollars in thousands) Core Deposits Customer Relationships Total 2018 Gross intangibles $ 15,636 $ 7,480 $ 23,116 Intangibles recorded from acquisitions 2,363 — 2,363 Accumulated amortization (12,540 ) (4,754 ) (17,294 ) Total acquisition-related intangibles $ 5,459 $ 2,726 $ 8,185 Servicing rights 2,655 Total other intangibles $ 10,840 2017 Gross intangibles $ 16,150 $ 5,373 $ 21,523 Intangibles recorded from acquisitions — 1,593 1,593 Accumulated amortization (10,281 ) (3,675 ) (13,956 ) Total acquisition-related intangibles $ 5,869 $ 3,291 $ 9,160 Servicing rights 2,305 Total other intangibles $ 11,465 Peoples performed other intangible assets impairment testing and concluded there was no impairment in the recorded value of other intangible assets as of December 31, 2018, based upon estimated fair value. During the annual other intangible assets impairment test, Peoples assessed qualitative factors, including relevant events and circumstances, to determine that it was more likely than not that the fair value of other intangible assets exceeded the carrying value. Other intangible assets recorded from the ASB acquisition were $2.6 million in 2018, which included $2.4 million in core deposit intangible assets and $276,000 in servicing rights. Other intangible assets recorded from acquisitions of $1.6 million in 2017 related to the acquisitions of a third-party insurance administration company and a property and casualty focused independent insurance agency. Refer to Note 19 Acquisitions for additional information. The following table details estimated aggregate future amortization of other intangible assets at December 31, 2018 : (Dollars in thousands) Core Deposits Customer Relationships Total 2019 $ 1,999 $ 779 $ 2,778 2020 1,438 629 2,067 2021 911 470 1,381 2022 437 318 755 2023 236 217 453 Thereafter 438 313 751 Total $ 5,459 $ 2,726 $ 8,185 The following is an analysis of activity of servicing rights for the years ended December 31: (Dollars in thousands) 2018 2017 2016 Balance, beginning of year $ 2,305 $ 2,305 $ 2,387 Amortization (1,623 ) (741 ) (762 ) Servicing rights originated 1,697 741 680 Servicing rights acquired 276 — — Balance, end of year $ 2,655 $ 2,305 $ 2,305 No valuation allowances were required at December 31, 2018 , 2017 and 2016 for Peoples’ servicing rights since, at each date, the fair value equaled or exceeded the book value. The fair value of servicing rights was $4.6 million and $3.9 million at December 31, 2018 and 2017, respectively. Fair value at December 31, 2018 was determined using discount rates ranging from 10.5% to 13.0% , prepayment speeds ranging from 8.7% to 11.6% , depending on the stratification of the specific right, utilizing state delinquency to calculate the default rate. Fair value at December 31, 2017 was determined using discount rates ranging from 9.3% to 11.8% , prepayment speeds ranging from 8.9% to 22.6% .

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Deposit Disclosure	Deposits Peoples’ deposit balances were comprised of the following at December 31: (Dollars in thousands) 2018 2017 Retail CDs: $100,000 or more $ 182,717 $ 149,105 Less than $100,000 211,618 189,568 Retail CDs 394,335 338,673 Interest-bearing deposit accounts 573,702 593,415 Savings accounts 468,500 446,714 Money market deposit accounts 379,878 371,376 Governmental deposit accounts 267,319 264,524 Brokered CDs 263,854 159,618 Total interest-bearing deposits 2,347,588 2,174,320 Non-interest-bearing deposits 607,877 556,010 Total deposits $ 2,955,465 $ 2,730,330 The contractual maturities of CDs for each of the next five years and thereafter are as follows: (Dollars in thousands) Retail Brokered Total 2019 $ 196,849 $ 235,421 $ 432,270 2020 84,416 18,330 102,746 2021 69,399 5,540 74,939 2022 19,268 4,081 23,349 2023 23,212 482 23,694 Thereafter 1,191 — 1,191 Total CDs $ 394,335 $ 263,854 $ 658,189 Deposits from related parties were $11.3 million and $12.0 million at December 31, 2018 and 2017 , respectively.

Short-Term Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2018
Short-term Debt [Abstract]
Short-term Borrowings Disclosure	Short-Term Borrowings Peoples utilizes various short-term borrowings as sources of funds, which are summarized as follows at December 31: (Dollars in thousands) Retail Repurchase Agreements FHLB Advances National Market Repurchase Agreements Other (a) 2018 Ending balance $ 51,202 $ 305,000 $ — $ (4 ) Average balance 64,519 219,897 14,329 301 Highest month-end balance 72,822 307,561 30,000 1,553 Interest expense $ 194 $ 4,494 $ 527 $ 23 Weighted-average interest rate: End of year 0.48 % 2.32 % — % — % During the year 0.30 % 2.04 % 3.68 % NM 2017 Ending balance $ 76,899 $ 92,592 $ 40,000 $ — Average balance 75,344 100,205 6,685 13 Highest month-end balance 80,649 208,000 40,000 — Interest expense $ 128 $ 1,160 $ 246 $ — Weighted-average interest rate: End of year 0.17 % 1.91 % 3.68 % — % During the year 0.17 % 1.16 % 3.68 % 1.30 % 2016 Ending balance $ 74,607 $ 231,000 $ — $ — Average balance 72,886 86,260 — 23 Highest month-end balance 81,353 231,000 — — Interest expense $ 124 $ 384 $ — $ — Weighted-average interest rate: End of year 0.17 % 0.64 % — % — % During the year 0.17 % 0.45 % — % 1.11 % (a) NM = not meaningful. Peoples’ retail repurchase agreements consist of overnight agreements with Peoples’ commercial customers and serve as a cash management tool. The FHLB advances consist of overnight borrowings, 90-day advances used to fund interest rate swaps, other advances with an original maturity of one year or less, and the current portion of long-term advances due in less than one year. These advances, along with the long-term advances disclosed in Note 9 Long-Term Borrowings, are collateralized by residential mortgage loans and investment securities. Peoples’ borrowing capacity with the FHLB is based on the amount of collateral pledged and the amount of FHLB common stock owned. Peoples reclassified $30.0 million and $50.6 million of FHLB advances from long-term borrowings to short-term borrowings in 2018 and 2017, respectively, due to maturity dates of less than one year, of which $40.0 million and $20.0 million matured in 2018 and 2017, respectively. Peoples' national market repurchase agreements consist of agreements with unrelated financial service companies. Additional information regarding the national market repurchase agreements can be found in Note 9 Long-Term Borrowings. The $40.0 million of national market repurchase agreements were reclassified from long-term borrowings to short-term borrowings during 2017 and matured in 2018. Other short-term borrowings consist primarily of federal funds purchased and advances from the Federal Reserve Discount Window. Federal funds purchased are short-term borrowings from correspondent banks that typically mature within one to ninety days. Interest on federal funds purchased is set daily by the correspondent bank based on prevailing market rates. The Federal Reserve Discount Window provides credit facilities to financial institutions, which are designed to ensure adequate liquidity by providing a source of short-term funds. Federal Reserve Discount Window advances are typically overnight and must be secured by collateral acceptable to the FRB. At December 31, 2018 , Peoples had available Federal Reserve Discount Window credit of $107.9 million . Other short-term borrowings also includes the unamortized debt issuance costs related to the costs associated with the Credit Agreement (the "RJB Credit Agreement") with Raymond James Bank, N.A. which was a short-term obligation as of December 31, 2018. For further information on the RJB Credit Agreement, refer to Note 9 Long-term Borrowings.

Long-Term Borrowings

Long-Term Borrowings	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Long-Term Borrowings	Long-Term Borrowings Long-term borrowings consisted of the following at December 31 : 2018 2017 (Dollars in thousands) Balance Weighted- Average Rate Balance Weighted- Average Rate FHLB putable, non-amortizing, fixed rate advances $ 85,000 2.05 % $ 115,000 1.86 % FHLB amortizing, fixed rate advances 17,361 2.09 % 21,939 2.02 % Junior subordinated debt securities 7,283 7.83 % 7,107 4.97 % Unamortized debt issuance cost — — % (27 ) — % Long-term borrowings $ 109,644 2.44 % $ 144,019 2.04 % The putable, non-amortizing, fixed rate FHLB advances have maturities ranging from one to nine years that may be repaid prior to maturity, subject to termination fees. The FHLB has the option, at its sole discretion, to terminate the advance after the initial fixed rate period of three months , requiring full repayment of the advance by Peoples, prior to the stated maturity. If the advance is terminated prior to maturity, the FHLB will offer Peoples replacement funding at the then-prevailing rate on an advance product then offered by the FHLB, subject to normal FHLB credit and collateral requirements. These advances require monthly interest payments, with no repayment of principal until the earlier of either an option to terminate exercised by the FHLB or the stated maturity. The amortizing, fixed rate FHLB advances have a fixed rate for the term of each advance, with maturities ranging from one to thirteen years . These advances require monthly principal and interest payments, with some having a constant prepayment rate requiring an additional principal payment annually. These advances are not eligible for optional prepayment prior to maturity. Long-term FHLB advances are collateralized by assets owned by Peoples. Peoples continually evaluates the overall balance sheet position given the interest rate environment. During 2018, Peoples borrowed no additional long-term advances from the FHLB. At December 31, 2018, outstanding long-term FLHB non-amortizing advances, which have interest rates ranging from 1.26% to 2.17% , mature between 2020 and 2027. During 2018, $30.0 million of long-term FHLB non-amortizing advances were reclassified to short-term borrowing as the maturity became less than one year. As of December 31, 2018, Peoples had 12 interest rate swaps with a notional value of $110.0 million , of which $60.0 million of the swaps roughly coincided with the 2018 maturity of existing FHLB advances, while $50.0 million was new. During 2017, Peoples borrowed an additional $75.0 million of long-term FHLB non-amortizing advances, which have interest rates ranging from 1.20% to 2.03% and mature between 2018 and 2022. Peoples also entered into two additional interest rate swaps in 2017 with a notional value of $20.0 million associated with People' cash outflows for various FHLB advances. The swaps become effective in 2018, roughly to coincide with the maturity of existing FHLB advances. During 2017, $40.0 million in callable national market repurchase agreements and $50.6 million in long-term FHLB non-amortizing advances were reclassified to short-term borrowings as the maturity became less than one year. Additional information regarding Peoples' interest rate swaps can be found in Note 14 Derivative Financial Instruments. Peoples' callable national market repurchase agreements consist of agreements with unrelated financial service companies and have original maturities ranging from five to ten years . In general, these agreements may not be terminated by Peoples prior to maturity without incurring additional costs. The callable national market repurchase agreements contain call option features, in which the buyer has the right, at its discretion, to terminate the repurchase agreement after an initial period ranging from three months to five years . After the initial call period, the buyer has a one-time option to terminate the repurchase agreement. If the buyer exercises its option, Peoples would be required to repay the repurchase agreement in full at the quarterly date. As of December 31, 2018, Peoples' callable national market repurchase agreements had no remaining callable options. Peoples is required to make quarterly interest payments. On March 4, 2016, Peoples entered into the RJB Credit Agreement, with Raymond James Bank, N.A. ("Raymond James Bank") which has a three-year term and provides Peoples with a revolving line of credit in the maximum aggregate principal amount of $15.0 million (the "RJB Loan Commitment") for the purpose of: (i) to the extent that any amounts remained outstanding, paying off the then outstanding $15.0 million revolving credit loan of Peoples; (ii) making acquisitions; (iii) making stock repurchases; (iv) working capital needs; and (v) other general corporate purposes. On March 4, 2016, Peoples paid fees of $70,600 , representing 0.47% of the RJB Loan Commitment. The RJB Credit Agreement is unsecured. However, the RJB Credit Agreement contains negative covenants which preclude Peoples from: (i) taking any action which could, directly or indirectly, decrease Peoples' ownership (alone or together with any of Peoples' subsidiaries) interest in Peoples Bank (Peoples' Ohio state-chartered subsidiary bank) or any of Peoples Bank's subsidiaries to a level below the percentage of equity interests held as of March 4, 2016; (ii) taking any action to or allowing Peoples Bank or any of Peoples Bank's subsidiaries to take any action to directly or indirectly create, assume, incur, suffer or permit to exist any pledge, encumbrance, security interest, assignment, lien or charge of any kind or character on the equity interests of Peoples Bank or any of Peoples Bank's subsidiaries; or (iii) taking any action to or allow Peoples Bank or any of Peoples Bank's subsidiaries to sell, transfer, issue, reissue or exchange, or grant any option with respect to, any equity interest of Peoples Bank or any of Peoples Bank's subsidiaries. There are also negative covenants limiting the actions which may be taken with respect to the authorization or issuance of additional shares of any class of equity interests of Peoples Bank or any of Peoples Bank's subsidiaries or the grant to any person other than Raymond James Bank of any proxy for existing equity interests of Peoples Bank or any of Peoples Bank's subsidiaries. The RJB Credit Agreement contains covenants which are usual and customary for comparable transactions. In addition to the negative covenants affecting the equity interests of Peoples Bank and Peoples Bank's subsidiaries discussed above, under the RJB Credit Agreement, the following covenants must be complied with: (a) neither Peoples nor any of its subsidiaries may create, incur or suffer to exist additional indebtedness with an aggregate principal amount which exceeds $10 million at any time outstanding, subject to specific negotiated carve-outs; (b) neither Peoples nor any of its subsidiaries may be a party to certain material transactions (such as mergers or consolidations with third parties, liquidations or dissolutions, sales of assets, acquisitions, investments and sale/leaseback transactions), subject to transactions in the ordinary course of the banking business of Peoples Bank and new investments in an aggregate amount not exceeding $10 million being permitted as well as specific negotiated carve-outs; (c) neither Peoples nor any of its subsidiaries may voluntarily prepay, defease, purchase, redeem, retire or otherwise acquire any subordinated indebtedness issued by them; subject to specific negotiated carve-outs and the consent of Raymond James Bank; and (d) neither Peoples nor any of its subsidiaries may make any Restricted Payments (as defined in the RJB Credit Agreement), except that, to the extent legally permissible, (i) any subsidiary may declare and pay dividends to Peoples or a wholly-owned subsidiary of Peoples and (ii) Peoples may declare and pay dividends on its common shares provided that no event of default exists before or after giving effect to the dividend and Peoples is in compliance (on a pro forma basis) with the financial covenants specified in the RJB Credit Agreement, after giving effect to the dividend. Peoples and Peoples Bank are also required to satisfy certain financial covenants including: (i) Peoples (on a consolidated basis) and Peoples Bank must be "well capitalized" at all times, as defined and determined by the applicable governmental authority having jurisdiction over Peoples or Peoples Bank; (ii) Peoples (on a consolidated basis) and Peoples Bank must maintain a total risk-based capital ratio (as defined by the applicable governmental authority having regulatory authority over Peoples or Peoples Bank) of at least 12.50% as of the last day of any fiscal quarter; (iii) Peoples Bank must maintain a ratio of "Non-Performing Assets" to "Tangible Primary Capital" of not more than 20% as of the last day of any fiscal quarter; (iv) Peoples Bank must maintain a ratio of "Loan Loss Reserves" to "Non-Performing Loans" of not less than 70% at all times; and (v) Peoples (on a consolidated basis) must maintain a "Fixed Charge Coverage Ratio" that equals or exceeds 1.00 to 1.25 as of the end of each fiscal quarter, with the items used in this ratio being determined on a trailing four-fiscal quarter basis. As of December 31, 2018 , Peoples was in compliance with the applicable covenants imposed by the RJB Credit Agreement. The RJB Credit Agreement matures on March 3, 2019. Peoples is in the process of renewing this facility and expects that it will be renewed prior to its expiration. On March 6, 2015, Peoples completed its acquisition of NB&T Financial Group, Inc. ("NB&T"), which included the assumption of Fixed/Floating Rate Junior Subordinated Debt Securities due in 2037 (the "junior subordinated debt securities") at an acquisition-date fair value of $6.6 million , held in a wholly-owned statutory trust whose common securities were wholly-owned by NB&T. The sole assets of the statutory trust are the junior subordinated debt securities and related payments. The junior subordinated debt securities and the back-up obligations, in the aggregate, constitute a full and unconditional guarantee of the obligations of the statutory trust under the Capital Securities held by third-party investors. Distributions on the Capital Securities are payable at the annual rate of 1.50% over the 3-month LIBOR. Distributions on the Capital Securities are included in interest expense in the Consolidated Financial Statements. These securities are considered tier I capital (with certain limitations applicable) under current regulatory guidelines. The junior subordinated debt securities are subject to mandatory redemption, in whole or in part, upon repayment of the Capital Securities at maturity or their earlier redemption at the liquidation amount. Subject to prior approval of the FRB, the Capital Securities are redeemable prior to the maturity date of September 6, 2037, and are redeemable at par. Since September 6, 2012, the Capital Securities have been redeemable at par, subject to such approval. Distributions on the Capital Securities can be deferred from time to time for a period not to exceed 20 consecutive semi-annual periods. At December 31, 2018 , the aggregate minimum annual retirements of long-term borrowings in future periods were as follows: (Dollars in thousands) Balance Weighted-Average Rate 2019 $ 3,512 1.53 % 2020 25,564 1.83 % 2021 21,979 1.73 % 2022 16,521 1.95 % 2023 1,157 1.01 % Thereafter 40,911 3.51 % Long-term borrowings $ 109,644 2.44 %

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2018
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity	Stockholders’ Equity The following table details the activity in Peoples’ common stock and treasury stock during the years ended December 31 : Common Stock Treasury Stock Shares at December 31, 2015 18,931,200 586,686 Changes related to stock-based compensation awards: Grant of restricted common shares — (56,000 ) Release of restricted common shares — 17,220 Cancellation of restricted common shares (11,820 ) 1,000 Exercise of stock options for common shares — (1,775 ) Grant of common shares — (350 ) Changes related to deferred compensation plan for Boards of Directors: Purchase of treasury stock — 8,396 Reissuance of treasury stock — (12,012 ) Common shares purchased under repurchase program — 279,770 Common shares issued under dividend reinvestment plan 19,711 — Common shares issued under compensation plan for Boards of Directors — (11,450 ) Common shares issued under employee stock purchase plan — (15,727 ) Shares at December 31, 2016 18,939,091 795,758 Changes related to stock-based compensation awards: Grant of restricted common shares — (68,707 ) Release of restricted common shares — 10,452 Cancellation of restricted common shares (3,554 ) 5,050 Grant of common shares — (300 ) Exercise of stock options for common shares — (266 ) Changes related to deferred compensation plan for Boards of Directors: Purchase of treasury stock — 5,413 Reissuance of treasury stock — (24,634 ) Common shares issued under dividend reinvestment plan 16,848 — Common shares issued under compensation plan for Board of Directors — (9,092 ) Common shares issued under employee stock purchase plan — (11,225 ) Shares at December 31, 2017 18,952,385 702,449 Changes related to stock-based compensation awards: Release of restricted common shares — 32,082 Cancellation of restricted common shares — 2,011 Exercise of stock options for common shares — (102 ) Grant of restricted common shares — (106,805 ) Grant of common shares — (16,544 ) Changes related to deferred compensation plan for Board of Directors: Purchase of treasury stock — 6,526 Sale of treasury stock — (10 ) Reissuance of treasury stock — (2,089 ) Common shares issued under dividend reinvestment plan 19,282 — Common shares issued under compensation plan for Board of Directors — (4,699 ) Common shares issued under employee stock purchase plan — (11,530 ) Issuance of common shares related to acquisition of ASB 1,152,711 — Shares at December 31, 2018 20,124,378 601,289 On November 3, 2015, Peoples announced that its Board of Directors approved and adopted a share repurchase program authorizing Peoples to purchase, from time to time, up to an aggregate of $20 million of its outstanding common shares. No common shares were repurchased in 2015. During 2016, Peoples repurchased 279,770 common shares at a cost of $5.0 million under the program. No common shares were repurchased in 2017 and 2018. Under its Amended Articles of Incorporation, Peoples is authorized to issue up to 50,000 preferred shares, in one or more series, having such voting powers, designations, preferences, rights, qualifications, limitations and restrictions as determined by Peoples' Board of Directors. At December 31, 2018, Peoples had no preferred shares issued or outstanding. The following table details the cash dividends declared per common share for the year ended December 31: 2018 2017 First Quarter $ 0.26 $ 0.20 Second Quarter 0.28 0.20 Third Quarter 0.28 0.22 Fourth Quarter 0.30 0.22 Total dividends declared $ 1.12 $ 0.84 Accumulated Other Comprehensive (Loss) Income The following details the change in the components of Peoples’ accumulated other comprehensive (loss) income for the years ended December 31 : (Dollars in thousands) Unrealized Gain (Loss) on Securities Unrecognized Net Pension and Postretirement Costs Unrealized Gain (Loss) on Cash Flow Hedge Accumulated Other Comprehensive (Loss) Income Balance, December 31, 2015 $ 2,869 $ (3,228 ) $ — $ (359 ) Reclassification adjustments to net income: Realized gain on sale of securities, net of tax (604 ) — — (604 ) Other comprehensive (loss) income, net of reclassifications and tax (1,684 ) (93 ) 1,186 (591 ) Balance, December 31, 2016 $ 581 $ (3,321 ) $ 1,186 $ (1,554 ) Reclassification adjustments to net income: Realized gain on sale of securities, net of tax (1,939 ) — — (1,939 ) Realized loss due to settlement and curtailment, net of tax — 157 — 157 Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2018-02 (370 ) (754 ) 200 (924 ) Other comprehensive loss, net of reclassifications and tax (360 ) (338 ) (257 ) (955 ) Balance, December 31, 2017 $ (2,088 ) $ (4,256 ) $ 1,129 $ (5,215 ) Reclassification adjustments to net income: Realized gain on sale of securities, net of tax 115 — — 115 Realized loss due to settlement and curtailment, net of tax — 211 — 211 Amounts reclassified out of accumulated other comprehensive loss per ASU 2016-01 (5,020 ) — — (5,020 ) Other comprehensive (loss) income, net of reclassifications and tax (3,089 ) 334 (269 ) (3,024 ) Balance, December 31, 2018 $ (10,082 ) $ (3,711 ) $ 860 $ (12,933 ) As of December 31, 2017, Peoples elected to early adopt and retrospectively apply the reclassification of stranded income tax effects from accumulated other comprehensive loss to retained earnings, as permitted under ASU 2018-02. As of January 1, 2018, Peoples adopted ASU 2016-01, which resulted in reclassifying $5.0 million in net unrealized gains on equity securities from accumulated other comprehensive loss to retained earnings.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Employee Benefit Plans	Employee Benefit Plans Peoples sponsors a noncontributory defined benefit pension plan that covers substantially all employees hired before January 1, 2010. The plan provides retirement benefits based on an employee’s years of service and compensation. For employees hired before January 1, 2003, the amount of postretirement benefit is based on the employee’s average monthly compensation pay over the highest five consecutive years out of the employee’s last ten years with Peoples while an eligible employee. For employees hired on or after January 1, 2003, the amount of postretirement benefit is based on 2% of the employee’s annual compensation during the years 2003 through 2009 plus accrued interest. Effective January 1, 2010, the pension plan was closed to new entrants. Effective March 1, 2011, the accrual of pension plan benefits for all participants was frozen. Peoples recognized this freeze as a curtailment as of December 31, 2010 and March 1, 2011, under the terms of the pension plan. Effective July 1, 2013, a participant in the pension plan who is employed by Peoples may elect to receive or to commence receiving such person's retirement benefits as of the later of such person's normal retirement date or the first day of the month first following the date such person makes an election to receive his or her retirement benefits. Peoples also provides post-retirement health and life insurance benefits to former employees and directors. Only those individuals who retired before January 27, 2012 were eligible for life insurance benefits. As of January 1, 2011, all retirees who desire to participate in the Peoples Bank medical plan do so by electing COBRA, which provides up to 18 months of coverage; retirees over the age of 65 also have the option to pay to participate in a group Medicare supplemental plan. Peoples only pays 100% of the cost for those individuals who retired before January 1, 1993. For all others, the retiree is responsible for most, if not all, of the cost of the health benefits. Peoples’ policy is to fund the cost of the benefits as they arise. The following tables provide a reconciliation of the changes in the benefit obligations and fair value of assets of the plans for the years ended December 31, 2018 and 2017 , and a statement of the funded status as of December 31, 2018 and 2017 : Pension Benefits Post-retirement Benefits (Dollars in thousands) 2018 2017 2018 2017 Change in benefit obligation: Obligation at January 1 $ 12,991 $ 12,127 $ 91 $ 103 Interest cost 423 451 3 3 Plan participants’ contributions — — 46 46 Actuarial (gain) loss (1,519 ) 1,207 — (4 ) Benefit payments (197 ) (189 ) (57 ) (57 ) Settlements (703 ) (605 ) — — Obligation at December 31 $ 10,995 $ 12,991 $ 83 $ 91 Accumulated benefit obligation at December 31 $ 10,995 $ 12,991 $ 83 $ 91 Change in plan assets: Fair value of plan assets at January 1 $ 8,493 $ 7,582 $ — $ — Actual (loss) return on plan assets (554 ) 1,140 — — Employer contributions 3,195 565 11 11 Plan participants’ contributions — — 46 46 Benefit payments (197 ) (189 ) (57 ) (57 ) Settlements (703 ) (605 ) — — Fair value of plan assets at December 31 $ 10,234 $ 8,493 $ — $ — Funded status at December 31 $ (761 ) $ (4,498 ) $ (83 ) $ (91 ) Amounts recognized in Consolidated Balance Sheets: Accrued benefit liability $ (761 ) $ (4,498 ) $ (83 ) $ (91 ) Net amount recognized $ (761 ) $ (4,498 ) $ (83 ) $ (91 ) Amounts recognized in Accumulated Other Comprehensive Loss: Unrecognized prior service cost $ — $ — $ (1 ) $ (1 ) Unrecognized net loss (gain) 3,761 4,311 (52 ) (56 ) Total $ 3,761 $ 4,311 $ (53 ) $ (57 ) Weighted-average assumptions at year-end: Discount rate 3.55 % 3.40 % 3.40 % 3.40 % The estimated costs relating to Peoples’ pension benefits that will be amortized from accumulated other comprehensive loss into net periodic cost over the next fiscal year are $78,000 . Net Periodic Cost (Benefit) The following table details the components of the net periodic cost (benefit) for the plans at December 31: Pension Benefits Post-retirement Benefits (Dollars in thousands) 2018 2017 2016 2018 2017 2016 Interest cost $ 423 $ 451 $ 438 $ 3 $ 3 $ 4 Expected return on plan assets (640 ) (553 ) (492 ) — — — Amortization of net loss (gain) 104 102 95 (5 ) (6 ) (6 ) Settlement of benefit obligation 267 242 — — — — Net periodic cost (benefit) $ 154 $ 242 $ 41 $ (2 ) $ (3 ) $ (2 ) Weighted-average assumptions: Discount rate 3.55 % 3.80 % 3.90 % 3.40 % 3.80 % 3.90 % Expected return on plan assets 7.50 % 7.50 % 7.50 % n/a n/a n/a Rate of compensation increase n/a n/a n/a n/a n/a n/a For measurement purposes, a 5.5% annual rate of increase in the per capita cost of covered benefits (i.e., health care cost trend rate) was assumed for 2018 , grading down to an ultimate rate of 4.0% in 2064 . The health care trend rate assumption does not have a significant effect on the contributory defined benefit postretirement plan; therefore, a one percentage point increase or decrease in the trend rate is not material in the determination of the accumulated postretirement benefit obligation or the ongoing expense. Under US GAAP, Peoples is required to recognize a settlement gain or loss when the aggregate amount of lump-sum distributions to participants equals or exceeds the sum of the service and interest cost components of the net periodic pension cost. The amount of settlement gain or loss recognized is the pro rata amount of the unrealized gain or loss existing immediately prior to the settlement. In general, both the projected benefit obligation and fair value of plan assets are required to be remeasured in order to determine the settlement gain or loss. Settlement charges recorded were $267,000 in 2018 compared to $242,000 in 2017, and none in 2016. Determination of Expected Long-term Rate of Return The expected long-term rate of return on the pension plan's total assets is based on the expected return of each category of the pension plan's assets. Peoples' investment strategy for the pension plan's assets continues to allocate 60% to 75% to equity securities. The returns generated by equity securities over the last 10 years have been significantly lower than their long-term historical annual returns due in part to unfavorable economic conditions. Plan Assets Peoples' investment strategy, as established by Peoples' Retirement Plan Committee, is to invest assets of the pension plan based upon established target allocations, which include a target range of 60 - 75% allocation in equity securities, 20 - 40% in debt securities and 0 - 15% of other investments. The assets are reallocated periodically to meet the target allocations. The investment policy is reviewed periodically, under the advisement of a certified investment advisor, to determine if the policy should be changed. The following table provides the fair values of investments held in Peoples' pension plan at December 31, by major asset category: (Dollars in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) 2018 Equity securities: Mutual funds - equity $ 6,750 $ 6,750 $ — Debt securities: Mutual funds - taxable income 2,746 2,746 — Total fair value of pension assets $ 9,496 $ 9,496 $ — 2017 Equity securities: Mutual funds - equity $ 6,131 $ 6,131 $ — Debt securities: Mutual funds - taxable income 2,248 2,248 — Total fair value of pension assets $ 8,379 $ 8,379 $ — Pension plan assets also included cash and cash equivalents of $680,000 and accrued income of $58,000 at December 31, 2018 . Cash and cash equivalents were $113,000 and accrued income was $1,000 at December 31, 2017 . For further information regarding levels of input used to measure fair value, refer to Note 2 Fair Value of Financial Instruments. Equity securities held as investments in Peoples' pension plan did not include any securities of Peoples or related parties in 2018 or 2017 . Cash Flows Peoples expects to make between $10,000 to $15,000 of contributions to its pension plan in 2019; however, actual contributions are made at the discretion of the Retirement Plan Committee and Peoples' Board of Directors. During 2018, Peoples elected to make an additional contribution to take advantage of tax savings related to the Act that was enacted on December 22, 2017. Estimated future benefit payments, which reflect benefits attributable to estimated future service, for the years ending December 31 are as follows: (Dollars in thousands) Pension Benefits Post-retirement Benefits 2019 $ 1,000 $ 11 2020 1,095 10 2021 1,283 10 2022 740 9 2023 774 9 2024 to 2028 3,091 34 Total $ 7,983 $ 83 Retirement Savings Plan Peoples also maintains a retirement savings plan, or 401(k) plan, which covers substantially all employees. The plan provides participants the opportunity to save for retirement on a tax-deferred basis. Beginning January 1, 2011, matching contributions equaled 100% of participants' contributions that did not exceed 3% of the participants' compensation, plus 50% of participants' contributions between 3% and 5% of the participants' compensation. Matching contributions made by Peoples totaled $1.7 million in 2018 , $1.5 million in 2017 and $1.5 million in 2016 .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure	Income Taxes The Act was enacted on December 22, 2017 and required Peoples to reflect the changes associated with the Act’s provisions in the fourth quarter of 2017. Peoples was not able to make reasonable estimates for all items based on its knowledge of accounting under ASC 740, and the provisions of the tax laws that were in effect immediately prior to enactment. As of December 31, 2018, Peoples finalized the remeasurement of its net deferred tax assets and liabilities at the new statutory federal corporate income tax rate of 21% , which resulted in a reduction to income tax expense of $0.7 million in 2018. The final adjustment was mainly due to Peoples' contribution of $3.2 million to Peoples' defined benefit pension plan during 2018. As of December, 2017, Peoples had made reasonable estimates for the reduced statutory federal corporate income tax rate on its deferred tax balances and recognized a provisional amount of $0.9 million , which was included as a component of income tax expense from continuing operations for 2017. The reported income tax expense and effective tax rate in the Consolidated Statements of Income differ from the amounts computed by applying the statutory federal corporate income tax rate as follows for the years ended December 31 : (Dollars in thousands) 2018 2017 2016 Amount Rate Amount Rate Amount Rate Income tax computed at statutory federal corporate income tax rate $ 11,505 21.0 % $ 20,045 35.0 % $ 15,785 35.0 % Differences in rate resulting from: Release of valuation allowance (805 ) (1.5 )% — — % — — % Tax Cuts and Job Act (705 ) (1.3 )% 897 1.6 % — — % Tax-exempt interest income (554 ) (1.0 )% (1,092 ) (1.9 )% (1,170 ) (2.6 )% Bank owned life insurance (393 ) (0.7 )% (683 ) (1.2 )% (495 ) (1.1 )% Stock awards (332 ) (0.6 )% (154 ) (0.3 )% — — % Investments in tax credit funds (125 ) (0.2 )% (221 ) (0.4 )% (164 ) (0.4 )% Other, net 95 0.2 % (60 ) (0.1 )% 169 0.4 % Income tax expense $ 8,686 15.9 % $ 18,732 32.7 % $ 14,125 31.3 % On January 1, 2018, Peoples began recognizing income tax expense at the 21% statutory federal corporate income tax rate, which resulted in lower income tax expense for 2018, compared to recognition at the 35% statutory federal corporate income tax rate for 2017. During 2018, Peoples released a valuation allowance which reduced income tax expense by $0.8 million . The valuation allowance was related to a historic tax credit that Peoples had invested in during 2015. Peoples sold $6.7 million of equity investment securities in 2018, which resulted in a capital gain for tax purposes. This capital gain was large enough to offset an anticipated future capital loss expected to be recognized due to the structure of the historic tax credit investment, resulting in the release of the valuation allowance. Peoples' reported income tax expense consisted of the following for the years ended December 31 : (Dollars in thousands) 2018 2017 2016 Current income tax expense $ 8,995 $ 21,511 $ 16,587 Deferred income tax benefit (309 ) (2,779 ) (2,462 ) Income tax expense $ 8,686 $ 18,732 $ 14,125 The significant components of Peoples' deferred tax assets and liabilities consisted of the following at December 31 : (Dollars in thousands) 2018 2017 Deferred tax assets: Allowance for loan losses $ 8,559 $ 6,992 Available-for-sale securities 2,678 555 Accrued employee benefits 1,843 2,569 Tax credit investments 805 1,560 Other 73 116 Gross deferred tax assets $ 13,958 $ 11,792 Valuation allowance $ — $ 805 Total deferred tax assets $ 13,958 $ 10,987 Deferred tax liabilities: Purchase accounting adjustments $ 5,839 $ 6,092 Deferred loan income 3,061 2,459 Bank premises and equipment (a) 2,047 307 Derivative instruments 228 300 Tax credit investments 82 — Other 673 484 Total deferred tax liabilities $ 11,930 $ 9,642 Net deferred tax asset $ 2,028 $ 1,345 (a) Peoples elected Internal Revenue Code Section 179 bonus depreciation, which increased the bonus depreciation percentage from 50% to 100% for qualified properties acquired and placed in service after September 27, 2017, and before January 1, 2023. As of December 31, 2018 , Peoples had no operating loss carryforwards for tax purposes. The federal income tax benefit from sales of investment securities was $31,000 in 2018 . Sales of investment securities resulted in tax expense of $1.0 million in 2017 and $326,000 in 2016 . Income tax benefits are recognized in the Consolidated Financial Statements for a tax position only if it is considered "more likely than not" of being sustained in an audit, based solely on the technical merits of the income tax position. If the recognition criteria are met, the amount of income tax benefits to be recognized are measured based on the largest income tax benefit that is more than 50 percent likely to be realized on ultimate resolution of the tax position. The following table provides a reconciliation of uncertain tax positions at December 31: (Dollars in thousands) 2018 2017 Uncertain tax positions, beginning of year $ 550 $ 522 Gross increase based on tax positions related to current year 55 42 Gross increase for tax position taken during prior years 13 20 Gross decrease due to the statute of limitations (195 ) (34 ) Uncertain tax positions, end of year $ 423 $ 550 Peoples is subject to U.S. federal income tax, as well as to tax in various state income tax jurisdictions. Peoples' income tax returns are subject to review and examination by federal and state taxing authorities. Peoples is currently open to audit under the applicable statutes of limitations by the Internal Revenue Service for the years ended December 31, 2015 through 2017. The years open to examination by state taxing authorities vary by jurisdiction.

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The calculations of basic and diluted earnings per common share for the years ended December 31 were as follows: (Dollars in thousands, except per common share data) 2018 2017 2016 Distributed earnings allocated to common shareholders $ 21,334 $ 15,159 $ 11,532 Undistributed earnings allocated to common shareholders 24,660 23,115 19,483 Net earnings allocated to common shareholders $ 45,994 $ 38,274 $ 31,015 Weighted-average common shares outstanding 18,991,768 18,050,189 18,013,693 Effect of potentially dilutive common shares 130,492 158,495 141,770 Total weighted-average diluted common shares outstanding 19,122,260 18,208,684 18,155,463 Earnings per common share: Basic $ 2.42 $ 2.12 $ 1.72 Diluted $ 2.41 $ 2.10 $ 1.71 Anti-dilutive common shares excluded from calculation: Restricted shares, stock options and stock appreciation rights 1,748 453 20,769

Financial Instruments with Off-

Financial Instruments with Off-Balance Sheet Risk	12 Months Ended
	Dec. 31, 2018
Financial Instruments with Off-Balance Sheet Risk [Abstract]
Financial Instruments Disclosure [Text Block]	Off-Balance Sheet Risk Loan Commitments and Standby Letters of Credit Loan commitments are made to accommodate the financial needs of Peoples' customers. Standby letters of credit are instruments issued by Peoples Bank guaranteeing the beneficiary payment by Peoples Bank in the event of default by Peoples Bank's customer in the nonperformance of an obligation or service. Historically, most loan commitments and standby letters of credit expire unused. Peoples' exposure to credit loss in the event of nonperformance by the counter-party to the financial instrument for loan commitments and standby letters of credit is represented by the contractual amount of those instruments. Peoples uses the same underwriting standards in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained is based on management's credit evaluation of the customer. Collateral held varies, but may include accounts receivable; inventory; property, plant, and equipment; and income-producing commercial properties. The total amounts of loan commitments and standby letters of credit at December 31 are summarized as follows: (Dollars in thousands) 2018 2017 Home equity lines of credit $ 101,265 $ 83,949 Unadvanced construction loans 74,734 112,475 Other loan commitments 314,271 260,552 Loan commitments 490,270 456,976 Standby letters of credit $ 10,214 $ 20,873

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2018
Regulatory Matters [Abstract]
Regulatory Capital Requirements under Banking Regulations	Regulatory Matters The following is a summary of certain regulatory matters affecting Peoples and its subsidiaries: Federal Reserve Board Requirements Peoples Bank is required to maintain a minimum level of reserves, consisting of cash on hand and non-interest-bearing balances with the FRB, based on the amount of total deposits. Average required reserve balances were approximately $16.4 million and $17.7 million in 2018 and 2017 , respectively. Limits on Dividends The primary source of funds for the dividends paid by Peoples is dividends received from Peoples Bank. The payment of dividends by Peoples Bank is subject to various banking regulations. The most restrictive provision requires regulatory approval if dividends declared in any calendar year exceed the total net profits of that year plus the retained net profits of the preceding two years. At December 31, 2018 , Peoples Bank had approximately $61.9 million of net profits available for distribution to Peoples as dividends without regulatory approval. Capital Requirements Peoples and Peoples Bank are subject to various regulatory capital guidelines administered by the banking regulatory agencies. Under capital adequacy requirements and the regulatory framework for prompt corrective action, Peoples and Peoples Bank must meet specific capital guidelines that involve quantitative measures of each entity's assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. Peoples' and Peoples Bank's capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Failure to meet future minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by the regulators that, if undertaken, could have a material effect on Peoples' financial results. Quantitative measures established by regulation to ensure capital adequacy, and in effect at December 31, 2018 , required Peoples and Peoples Bank to maintain minimum amounts and ratios of common equity tier 1 capital, tier 1 capital and total capital (as defined in the regulations) to risk-weighted assets (as defined), and of tier I capital (as defined) to average assets (as defined). Peoples and Peoples Bank met all capital adequacy requirements at December 31, 2018 . As of December 31, 2018 , the most recent notifications from the banking regulatory agencies categorized Peoples Bank as well capitalized under the regulatory framework for prompt corrective action applicable to Peoples Bank. Peoples maintained the capital required by the Federal Reserve Board to be deemed well capitalized and remain a financial holding company. To be categorized as well capitalized, Peoples and Peoples Bank must maintain minimum common equity tier 1, tier 1 risk-based, total risk-based and tier I leverage ratios as set forth in the table below. There are no conditions or events since these notifications that management believes have changed Peoples' or Peoples Bank's category. Peoples' and Peoples Bank's actual capital amounts and ratios as of December 31 are also presented in the following table: 2018 2017 (Dollars in thousands) Amount Ratio Amount Ratio PEOPLES Common Equity Tier 1 (a) Actual $ 378,855 13.6 % $ 327,172 13.3 % For capital adequacy 125,235 4.5 % 110,998 4.5 % To be well capitalized 180,895 6.5 % 160,330 6.5 % Tier 1 (b) Actual $ 386,138 13.9 % $ 334,279 13.6 % For capital adequacy 166,980 6.0 % 147,997 6.0 % To be well capitalized 222,640 8.0 % 197,330 8.0 % Total Capital (c) Actual $ 406,333 14.6 % $ 355,977 14.4 % For capital adequacy 222,640 8.0 % 197,330 8.0 % To be well capitalized 278,300 10.0 % 246,662 10.0 % Tier 1 Leverage (d) Actual $ 386,138 10.0 % $ 334,279 9.8 % For capital adequacy 154,615 4.0 % 137,119 4.0 % To be well capitalized 193,269 5.0 % 171,399 5.0 % Capital Conservation Buffer $ 183,693 6.6 % $ 158,647 6.4 % Fully phased in minimum 69,575 2.5 % 61,666 2.5 % Net Risk-Weighted Assets $ 2,782,995 $ 2,466,620 PEOPLES BANK Common Equity Tier 1 (a) Actual $ 365,063 13.2 % $ 305,216 12.4 % For capital adequacy 124,870 4.5 % 110,654 4.5 % To be well capitalized 180,367 6.5 % 159,833 6.5 % Tier 1 (b) Actual $ 365,063 13.2 % $ 305,216 12.4 % For capital adequacy 166,493 6.0 % 147,539 6.0 % To be well capitalized 221,990 8.0 % 196,718 8.0 % Total Capital (c) Actual $ 385,258 13.9 % $ 324,026 13.2 % For capital adequacy 221,990 8.0 % 196,718 8.0 % To be well capitalized 277,488 10.0 % 245,898 10.0 % Tier 1 Leverage (d) Actual $ 365,063 9.5 % $ 305,216 8.9 % For capital adequacy 154,357 4.0 % 136,939 4.0 % To be well capitalized 192,947 5.0 % 171,174 5.0 % Capital Conservation Buffer $ 163,268 5.9 % $ 127,308 5.2 % Fully phased in minimum 69,372 2.5 % 61,474 2.5 % Net Risk-Weighted Assets $ 2,774,879 $ 2,458,975 (a) Ratio represents common equity tier 1 capital to net risk-weighted assets (b) Ratio represents tier 1 capital to net risk-weighted assets (c) Ratio represents total capital to net risk-weighted assets (d) Ratio represents tier 1 capital to average assets

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2018
Share-based Compensation [Abstract]
Stock-Based Compensation	Stock-Based Compensation Under the Peoples Bancorp Inc. Third Amended and Restated 2006 Equity Plan (the "2006 Equity Plan"), Peoples may grant, among other awards, nonqualified stock options, incentive stock options, restricted common shares awards, stock appreciation rights, performance units and unrestricted common share awards to employees and non-employee directors. The total number of common shares available under the 2006 Equity Plan is 891,340 . The maximum number of common shares that can be issued for incentive stock options is 500,000 common shares. Prior to 2007, Peoples granted nonqualified and incentive stock options to employees and nonqualified stock options to non-employee directors under the 2006 Equity Plan and predecessor plans. In 2007 and 2008, Peoples granted stock appreciation rights ("SARs") to employees to be settled in common shares. Since February 2009, Peoples has granted restricted common shares to employees, and periodically to non-employee directors, subject to the terms and conditions prescribed by the 2006 Equity Plan. Additionally, in 2017, Peoples granted performance units to certain officers. In general, common shares issued in connection with stock-based awards are issued from treasury shares to the extent available. If no treasury shares are available, common shares are issued from authorized but unissued common shares. Stock Appreciation Rights SARs granted to employees had an exercise price equal to the fair market value of Peoples’ common shares on the date of grant and were settled using common shares of Peoples. Additionally, the SARs granted to employees vested three years after the respective grant dates and expired ten years from the respective date of grant. The most recent grant of SARs occurred in 2008 and these SARs were exercised immediately prior to their expiration on February 20, 2018. The following summarizes the changes to Peoples' outstanding SARs for the year ended December 31, 2018 : Number of Common Shares Subject to SARs Weighted- Average Exercise Price Weighted- Average Remaining Contractual Life Aggregate Intrinsic Value Outstanding at January 1 314 $ 23.77 Exercised 314 23.77 Forfeited — — Outstanding at December 31 — $ — — $ — Exercisable at December 31 — $ — — $ — Restricted Common Shares Under the 2006 Equity Plan, Peoples may award restricted common shares to officers, key employees and non-employee directors. In general, the restrictions on restricted common shares awarded to employees expire after periods ranging from one to three years . Prior to 2017, the restrictions on restricted common shares awarded to non-employee directors expired after six months ; however, the practice of granting restricted common shares ceased in 2017 and the common shares awarded to non-employee directors in 2017 and 2018 were granted with no restrictions. In 2018, Peoples granted an aggregate of 84,876 restricted common shares subject to performance-based vesting to officers and key employees with restrictions that will lapse three years after the grant date; provided that in order for the restricted common shares to vest in full, Peoples must have reported positive net income and maintained a well capitalized status by regulatory standards for each of the three fiscal years preceding the vesting date. In addition, during 2018, Peoples granted, to certain key employees, an aggregate of 21,929 restricted common shares subject to time-based vesting with restrictions that will lapse three years after the grant date. The following summarizes the changes to Peoples’ outstanding restricted common shares for the year ended December 31, 2018 : Time-Based Vesting Performance-Based Vesting Number of Common Shares Weighted-Average Grant Date Fair Value Number of Common Shares Weighted-Average Grant Date Fair Value Outstanding at January 1 33,082 $ 22.85 176,218 $ 25.50 Awarded 21,929 36.38 84,876 35.43 Released 11,332 22.84 83,311 23.62 Forfeited — — 2,011 34.34 Outstanding at December 31 43,679 $ 29.64 175,772 $ 31.08 The total intrinsic value of restricted common shares released was $ 2.8 million , $1.1 million and $1.0 million in 2018 , 2017 and 2016 , respectively. Performance Unit Awards Under the 2006 Equity Plan, Peoples may grant performance unit awards to officers, key employees and non-employee directors. On July 26, 2017, Peoples granted a total of seven performance unit awards to officers, with a maximum aggregate dollar amount of $1.3 million represented by the performance units subject to such awards and each performance unit representing $1.00. The performance unit awards granted cover the performance period beginning January 1, 2018 and ending on December 31, 2019, and are subject to two performance goals. Twenty-five percent of the performance units subject to each award will vest if, but only if, the related company-specific target performance goal is achieved. The remaining 75% of the performance units subject to each award will vest based on the relative performance of Peoples compared to a defined peer group (measured by percentile ranking) with respect to the related maximum performance goal. If, for the performance period, the target level of achievement for the first performance goal and/or the maximum level of achievement for the second performance goal is not reached, the dollar amount represented by the performance units associated with each performance goal will be adjusted to reflect the level of performance achieved. After the vesting date, the participant will receive that number of common shares of Peoples equal to (i) the aggregate number of the participant's performance units (and equivalent dollar value of such performance units) that vested based on the performance achieved under both performance goals (ii) divided by the fair market value of a common share of Peoples on the date the performance units are deemed to have vested (which will be the last day of the performance period) and rounded down to the nearest whole common share. Stock-Based Compensation Peoples recognizes stock-based compensation, which is included as a component of Peoples’ salaries and employee benefit costs, for restricted common shares and performance unit awards, as well as purchases made by participants in the employee stock purchase plan. For restricted common shares, Peoples recognizes stock-based compensation based on the estimated fair value of the awards on the grant date, for the portion of awards that is expected to vest, over the vesting period. For performance unit awards, Peoples recognizes stock-based compensation, over the performance period, based on the portion of the awards that is expected to vest based on the expected level of achievement of the two performance goals. Peoples also has an employee stock purchase plan whereby employees can purchase Peoples' common shares at a discount of up to 15%. The following summarizes the amount of stock-based compensation and related tax benefit recognized for the years ended December 31: (Dollars in thousands) 2018 2017 2016 Stock-based compensation $ 2,575 $ 1,802 $ 1,392 Recognized tax benefit (541 ) (378 ) (487 ) Net expense recognized $ 2,034 $ 1,424 $ 905 Restricted common shares were the primary form of stock-based compensation awards granted by Peoples in 2018 , 2017 and 2016 . The fair value of restricted common share awards on the grant date is the market price of Peoples' common shares. Total unrecognized stock-based compensation related to unvested restricted common share awards was $ 2.3 million at December 31, 2018 , which will be recognized over a weighted-average period of 1.8 years. In 2018, the Board of Directors granted 3,600 unrestricted common shares to non-employee directors, with related stock-based compensation of $128,000 , and 12,144 unrestricted common shares to full-time and part-time employees who did not already participate in the 2006 Equity Plan, with related stock-based compensation of $416,000 . During 2018, Peoples also recorded $156,000 of stock-based compensation associated with the performance unit awards, which represented a new form of award in 2018 and for which no stock-based compensation was recognized in 2017 or 2016. Additionally, Peoples recognized $60,000 , $55,000 and $60,000 of stock-based compensation associated with the employee stock purchase plan, based on purchases by employees thereunder, in 2018, 2017 and 2016, respectively.

Acquisitions (Notes)

Acquisitions (Notes)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	Acquisitions On October 29, 2018, Peoples entered into an agreement and plan of merger (the "First Prestonsburg Merger Agreement") with First Prestonsburg Bancshares Inc. ("First Prestonsburg"), which calls for First Prestonsburg to merge into Peoples. First Prestonsburg is the parent company of The First Commonwealth Bank of Prestonsburg, Inc. ("First Commonwealth"), which operates nine full-service branches located in eastern Kentucky. Following the merger of First Prestonsburg into Peoples, First Commonwealth will merge into Peoples Bank. This transaction is expected to close during the second quarter of 2019, subject to the satisfaction of customary closing conditions. As of December 31, 2018, First Prestonsburg had approximately $308.5 million in total assets, which included approximately $140.1 million in total loans, and approximately $236.6 million in total deposits. Under the terms of the First Prestonsburg Merger Agreement, shareholders of First Prestonsburg will be entitled to receive 12.512 common shares of Peoples for each First Prestonsburg share of common stock they own at the effective time of the merger. In addition, immediately prior to the closing of the merger, First Prestonsburg will pay a special cash distribution of $140.30 per share to its shareholders. On April 13, 2018, Peoples completed its acquisition of ASB for total consideration of $41.5 million , which reflected the conversion of each of the 1,979,034 outstanding ASB common shares into $20.00 in cash or 0.592 in Peoples' common shares. ASB merged into Peoples, and ASB's wholly-owned subsidiary, American Savings Bank, fsb, which operated seven full-service branches in southern Ohio and eastern Kentucky, merged into Peoples Bank. Per the applicable accounting guidance for business combinations, the acquisition date fair values of the assets purchased, liabilities assumed and related identifiable intangible assets are preliminary and subject to refinement for up to one year after the closing date of the acquisition as additional information relative to closing date fair values becomes available. The following table provides the purchase price calculation as of the date of acquisition of ASB, and the assets acquired and liabilities assumed at their estimated fair values. (Dollars in thousands, except per share data) Purchase Price Common shares electing cash consideration 31,763 Cash purchase price per share $ 20.00 Cash consideration $ 635 Common shares electing stock consideration 1,947,271 Number of common shares of Peoples issued for each common share of acquired company 0.592 Price per Peoples' common share, as of April 13, 2018 $ 35.48 Common share consideration $ 40,898 Cash in lieu of fractional common shares of Peoples $ 2 Total consideration $ 41,535 Net Assets at Fair Value Assets Cash and due from banks $ 5,332 Available-for-sale investment securities 18,155 Held-to-maturity investment securities 649 Other investment securities 1,596 Total investment securities 20,400 Loans, net of deferred fees and costs 236,628 Loans held for sale 2,539 Bank premises and equipment, net of accumulated depreciation 3,485 Bank owned life insurance 4,803 Other intangible assets 2,639 Other assets 3,112 Total assets $ 278,938 Liabilities Deposits: Non-interest-bearing $ 29,487 Interest-bearing 169,142 Total deposits 198,629 Short-term borrowings 54,824 Accrued expenses and other liabilities 2,084 Total liabilities $ 255,537 Net assets $ 23,401 Goodwill $ 18,134 The estimated fair values presented in the above table reflect additional information that was obtained during the three months ended December 31, 2018, which resulted in changes to certain fair value estimates made as of the date of acquisition. Adjustments to acquisition date estimated fair values are recorded during the period in which they occur and, as a result, previously recorded results have changed. After considering the additional information, bank premises and equipment, net of accumulated depreciation, increased $165,000 ; other assets decreased $369,000 ; and accrued expenses and other liabilities decreased $632,000 , in each case from balances reported as of September 30, 2018. These revised fair value estimates resulted in a net decrease to goodwill of $428,000 from $18.6 million reported as of September 30, 2018, to $18.1 million which was recognized in the December 31, 2018 Consolidated Balance Sheet. Acquired loans, excluding acquired overdrafts of $438,000 , are reported net of the unamortized fair value adjustment. The following table details the fair value adjustment for acquired loans as of the acquisition date: (Dollars in thousands, except per share data) Nonimpaired Loans Contractual cash flows $ 342,087 Nonaccretable difference 59,967 Expected cash flows 282,120 Accretable yield 54,029 Fair value $ 228,091 Credit Impaired Loans Contractual cash flows $ 16,054 Nonaccretable difference 5,908 Expected cash flows 10,146 Accretable yield 2,047 Fair value $ 8,099 Peoples recorded non-interest expenses related to acquisitions of $7.3 million and net losses on asset disposals and other transactions of $203,000 in the Consolidated Statement of Income during 2018. The $7.3 million was included in the following line items on the Consolidated Statement of Income for the year ended December 31, 2018: $2.4 million of salaries and employee benefit costs, $1.1 million of professional fees, $59,000 of data processing expenses, $119,000 of marketing expense, and $3.6 million of other non-interest expense. The $2.4 million of salaries and employee benefit costs related to change in control agreements, retention and severance bonuses, and regular payroll and taxes after conversion.

Parent Company Only Financial I

Parent Company Only Financial Information	12 Months Ended
	Dec. 31, 2018
Parent Company Only Financial Information [Abstract]
Condensed Financial Information of Parent Company Only Disclosure	Parent Company Only Financial Information Condensed Balance Sheets December 31, (Dollars in thousands) 2018 2017 Assets: Cash and due from other banks $ 50 $ 50 Interest-bearing deposits in subsidiary bank 13,750 9,270 Due from subsidiary bank 584 9,486 Available-for-sale investment securities, at fair value (amortized cost of $615 at December 31, 2017) (a) — 6,933 Other investment securities (a) 216 — Investments in subsidiaries: Bank 506,200 431,482 Non-bank 8,298 1,812 Other assets 2,808 1,700 Total assets $ 531,906 $ 460,733 Liabilities: Accrued expenses and other liabilities $ 1,898 $ 1,471 Dividends payable 291 270 Mandatorily redeemable capital securities of subsidiary trust 9,577 400 Total liabilities 11,766 2,141 Total stockholders' equity 520,140 458,592 Total liabilities and stockholders' equity $ 531,906 $ 460,733 (a) As of January 1, 2018, Peoples adopted ASU 2016-01, resulting in the reclassification of $6.9 million of equity investment securities from available-for-sale investment securities to other investment securities. Condensed Statements of Income Year Ended December 31, (Dollars in thousands) 2018 2017 2016 Income: Dividends from subsidiary bank $ 13,500 $ 27,000 $ 20,500 Dividends from non-bank subsidiary 2,500 20,000 1,250 Net gain on investment securities — 2,602 — Interest and other income 357 237 209 Total income 16,357 49,839 21,959 Expenses: Trust preferred securities expense 520 346 397 Intercompany management fees 1,561 1,361 1,131 Other expense 4,647 3,380 3,154 Total expenses 6,728 5,087 4,682 Income before federal income taxes and equity in (excess dividends from) undistributed earnings of subsidiaries 9,629 44,752 17,277 Applicable income tax expense (2,511 ) (1,309 ) (1,718 ) Equity in (excess dividends from) undistributed earnings of subsidiaries 34,115 (7,590 ) 12,162 Net income $ 46,255 $ 38,471 $ 31,157 Statements of Cash Flows Year Ended December 31, (Dollars in thousands) 2018 2017 2016 Operating activities Net income $ 46,255 $ 38,471 $ 31,157 Adjustment to reconcile net income to cash provided by operations: Depreciation, amortization and accretion, net 9,177 (6,525 ) 190 (Equity in) excess dividends from undistributed earnings of subsidiaries (34,115 ) 7,590 (12,162 ) Gain on investment securities — (2,602 ) — Other, net 31 2,810 355 Net cash provided by operating activities 21,348 39,744 19,540 Investing activities Net proceeds from sales and maturities of investment securities 5,388 2,359 — Investment in subsidiaries (31,813 ) (50,883 ) (22,769 ) (Increase) decrease in receivable from subsidiary 32,236 25,496 23,389 Business combinations, net of cash received (637 ) — — Other, net 228 (229 ) — Net cash (used in) provided by investing activities 5,402 (23,257 ) 620 Financing activities Purchase of treasury stock (1,380 ) (508 ) (5,480 ) Proceeds from issuance of common stock — 9 18 Cash dividends paid (20,915 ) (14,706 ) (11,173 ) Excess tax benefit for share-based payments 25 — 26 Net cash used in financing activities (22,270 ) (15,205 ) (16,609 ) Net increase in cash and cash equivalents 4,480 1,282 3,551 Cash and cash equivalents at the beginning of year 9,320 8,038 4,487 Cash and cash equivalents at the end of year $ 13,800 $ 9,320 $ 8,038 Supplemental cash flow information: Interest paid $ 513 $ 364 $ 433

Summarized Quarterly Informatio

Summarized Quarterly Information (Unaudited)	12 Months Ended
	Dec. 31, 2018
Summarized Quarterly Information (Unaudited) [Abstract]
Quarterly Financial Information	Summarized Quarterly Information (Unaudited) 2018 (Dollars in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Total interest income $ 33,226 $ 37,769 $ 39,631 $ 40,638 Total interest expense 3,867 4,961 6,307 6,517 Net interest income 29,359 32,808 33,324 34,121 Provision for loan losses 1,983 1,188 1,302 975 Net gain (loss) on investment securities 1 (147 ) — — Net gain (loss) on asset disposals and other transactions 74 (405 ) 12 (15 ) Total non-interest income excluding net gains and losses 14,894 13,807 14,341 14,192 Amortization of other intangible assets 754 861 862 861 Acquisition-related expenses 149 6,056 675 382 Total non-interest expense excluding amortization of other intangible assets and acquisition-related expenses 27,318 29,054 29,292 29,713 Income tax expense 2,383 1,012 2,821 2,470 Net income $ 11,741 $ 7,892 $ 12,725 $ 13,897 Earnings per common share - basic $ 0.64 $ 0.41 $ 0.65 $ 0.71 Earnings per common share - diluted $ 0.64 $ 0.41 $ 0.65 $ 0.71 Weighted-average common shares outstanding - basic 18,126,089 19,160,728 19,325,457 19,337,403 Weighted-average common shares outstanding - diluted 18,256,035 19,293,381 19,466,865 19,483,452 2017 (Dollars in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Total interest income $ 29,817 $ 31,208 $ 32,728 $ 32,772 Total interest expense 2,872 3,118 3,508 3,650 Net interest income 26,945 28,090 29,220 29,122 Provision for loan losses 624 947 1,086 1,115 Net gain on investment securities 340 18 1,861 764 Net (loss) gain on asset disposals and other transactions (3 ) 109 (25 ) (144 ) Total non-interest income excluding net gains and losses 13,334 13,590 12,610 13,119 Amortization of other intangible assets 863 871 869 913 Acquisition-related expenses — — — 341 Total non-interest expense excluding amortization of other intangible and system conversion expenses 26,468 25,809 25,689 26,152 Income tax expense 3,852 4,414 5,127 5,339 Net income $ 8,809 $ 9,766 $ 10,895 $ 9,001 Earnings per common share - basic $ 0.49 $ 0.54 $ 0.60 $ 0.50 Earnings per common share - diluted $ 0.48 $ 0.53 $ 0.60 $ 0.49 Weighted-average common shares outstanding - basic 18,029,991 18,044,574 18,056,202 18,069,467 Weighted-average common shares outstanding - diluted 18,192,957 18,203,752 18,213,533 18,240,092

Revenue (Notes)

Revenue (Notes)	12 Months Ended
	Dec. 31, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Deferred Revenue Disclosure [Text Block]	Revenue The following table details Peoples' revenue from contracts with customers for the year ended December 31, 2018: (Dollars in thousands) Insurance income: Commission and fees from sale of insurance policies (a) $ 12,787 Fees related to third-party administration services (a) 573 Performance-based commissions (b) 1,452 Trust and investment income (a) 12,543 Electronic banking income: Interchange income (a) 9,721 Promotional and usage income (a) 1,756 Deposit account service charges: Ongoing maintenance fees for deposit accounts (a) 2,718 Transactional-based fees (b) 7,060 Commercial loan swap fees (b) 681 Other non-interest income transactional-based fees (b) 961 Total $ 50,252 Timing of revenue recognition: Services transferred over time $ 40,098 Services transferred at a point in time 10,154 Total $ 50,252 (a) Services transferred over time. (b) Services transferred at a point in time. Peoples records contract assets for income that has been recognized over a period of time for fulfillment of performance obligations, but has not yet been received related to electronic banking income. This income typically relates to bonuses for which Peoples is eligible, but will not receive until a certain time in the future. Peoples records contract liabilities for payments received for commission income related to the sale of insurance policies, for which the performance obligations have not yet been fulfilled. The contract liabilities are recognized as income over time, during the period in which the performance obligations are fulfilled, which is over the insurance policy period. Peoples also records contract liabilities for bonuses received related to electronic banking income, for which income is recognized during the period in which the performance obligations are fulfilled. The following table details the change in Peoples' contract assets and contract liabilities for the period ended December 31, 2018 : (Dollars in thousands) Contract Assets Contract Liabilities Balance, January 1, 2018 (a) $ — $ 4,700 Additional income receivable 207 — Additional deferred income — 5,055 Recognition of income previously deferred — (4,700 ) Balance, December 31, 2018 $ 207 $ 5,055 (a) The amount of $3.7 million reported elsewhere throughout this Form 10-K is the $4.7 million noted above, net of statutory federal corporate income taxes.

Derivative Financial Instrument

Derivative Financial Instrument (Notes)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Derivative Financial Instruments Peoples utilizes interest rate swap agreements as part of its asset liability management strategy to help manage its interest rate risk position. The notional amount of the interest rate swaps does not represent amounts exchanged by the parties. The amount exchanged is determined by reference to the notional amount and the other terms of the individual interest rate swap agreements. Derivatives and Hedging Activities - Risk Management Objective of Using Derivatives Peoples is exposed to certain risks arising from both its business operations and economic conditions. Peoples principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. Peoples manages economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources and duration of its assets and liabilities, and through the use of derivative financial instruments. Specifically, Peoples enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known or expected cash amounts, the value of which are determined by interest rates. Peoples’ derivative financial instruments are used to manage differences in the amount, timing and duration of Peoples' known or expected cash receipts and its known or expected cash payments principally related to certain variable rate borrowings. Peoples also has interest rate derivatives that result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk in Peoples' assets or liabilities. Peoples manages a matched book with respect to customer-related derivative financial instruments in order to minimize its net risk exposure resulting from such transactions. Cash Flow Hedges of Interest Rate Risk Peoples' objectives in using interest rate derivatives are to add stability to interest income and expense, and to manage its exposure to interest rate movements. To accomplish these objectives, Peoples has entered into interest rate swaps as part of its interest rate risk management strategy. These interest rate swaps were designated as cash flow hedges and involved the receipt of variable rate amounts from a counterparty in exchange for Peoples making fixed payments. Peoples acquired three interest rate swaps with the ASB acquisition in the second quarter of 2018, which had an aggregate notional value of $7.0 million , and all of which matured in July 2018. On July 31, 2018, Peoples entered into $50.0 million of interest rate swaps, which will mature between 2021 and 2028, with interest rates ranging from 2.92% to 3.00% . As of December 31, 2018 , Peoples had twelve interest rate swaps with an aggregate notional value of $110.0 million . Peoples will pay a fixed rate of interest for up to ten years while receiving a floating rate component of interest equal to the three-month LIBOR rate. The interest received on the floating rate component is intended to offset the rate on the rolling three-month FHLB advances. Amounts reported in accumulated other comprehensive loss related to derivatives will be reclassified to interest income or expense as interest payments are made or received on Peoples' variable-rate assets or liabilities. During the year ended December 31, 2018, Peoples had reclassifications to interest expense of $38,000 , which were a reduction to interest expense. No interest expense was recorded during 2017. During the next twelve months, Peoples estimates that minimal interest expense will be reclassified. For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of each derivative is reported in accumulated other comprehensive loss (outside of earnings), net of tax, and subsequently reclassified to earnings when the hedged transaction affects earnings, and the ineffective portion of changes in the fair value of the derivative is recognized directly in earnings. Peoples assesses the effectiveness of each hedging relationship by comparing the changes in cash flows of the derivative hedging instrument with the changes in cash flows of the designated hedged transaction. The reset dates and the payment dates on the 90-day advances used to fund the swaps are matched to the reset dates and payment dates on the receipt of the three-month LIBOR floating portion of the swaps to ensure effectiveness of the cash flow hedge. Effectiveness is measured by ensuring that reset dates and payment dates are matched. During the year ended December 31, 2018, Peoples had reclassifications to earnings of $18,000 due to ineffectiveness of the cash flow hedges. The following table summarizes information about the interest-rate swaps designated as cash flow hedges at December 31: (Dollars in thousands) 2018 2017 Notional amount $ 110,000 $ 60,000 Weighted average pay rates 2.37 % 1.88 % Weighted average receive rates 2.57 % 2.30 % Weighted average maturity 2/24/2025 12/29/2024 Unrealized gains $ 860 $ 1,129 The following table presents net gains recorded in accumulated other comprehensive income and in the Consolidated Statements of Income related to the cash flow hedges for the years ended December 31: (Dollars in thousands) 2018 2017 Amount of loss recognized in accumulated other comprehensive income, net of tax $ 341 $ 72 Amount of gain recognized in other non-interest income 18 — The following table reflects the cash flow hedges included in the Consolidated Balance Sheets at December 31: (Dollars in thousands) 2018 2017 Notional Amount Fair Value Notional Amount Fair Value Included in other assets: Interest rate swaps related to debt $ 60,000 $ 2,093 $ 40,000 $ 1,623 Total included in other assets 60,000 2,093 40,000 1,623 Included in liabilities: Interest rate swaps related to debt $ 50,000 $ 1,111 $ 20,000 $ 270 Total included in other liabilities 50,000 1,111 20,000 270 (a) Reclassifications to interest expense and reclassifications to earnings for ineffectiveness were minimal. Non-Designated Hedges Peoples maintains an interest rate protection program for commercial loan customers, which was established in 2010. Under this program, Peoples originates variable rate loans with interest rate swaps, where the customer enters into an interest rate swap with Peoples on terms that match the terms of the loan. By entering into the interest rate swap with the customer, Peoples Bank effectively provides the customer with a fixed rate loan while creating a variable rate asset for Peoples Bank. Peoples Bank offsets its exposure in the swap by entering into an offsetting interest rate swap with an unaffiliated institution. These interest rate swaps do not qualify as designated hedges; therefore, each swap is accounted for as a standalone derivative. Peoples had interest rate swaps associated with commercial loans with a notional value of $453.4 million and fair value of $2.5 million of equally offsetting assets and liabilities at December 31, 2018 and a notional value of $363.3 million and fair value of $3.0 million of equally offsetting assets and liabilities at December 31, 2017 . These interest rate swaps did not have a material impact on Peoples' results of operation or financial condition. The following table reflects the non-designated hedges included in the Consolidated Balance Sheets at December 31: (Dollars in thousands) 2018 2017 Notional Amount Fair Value Notional Amount Fair Value Included in other assets: Interest rate swaps related to commercial loans $ 226,662 $ 2,451 $ 181,659 $ 2,971 Total included in other assets 226,662 2,451 181,659 2,971 Included in liabilities: Interest rate swaps related to commercial loans $ 226,662 $ 2,451 $ 181,659 $ 2,971 Total included in other liabilities 226,662 2,451 181,659 2,971 Fair Values of Derivative Instruments on the Balance Sheet Peoples' fair value of the derivative financial instruments was $4.5 million in an asset position and $3.6 million in a liability position at December 31, 2018 , and there was a fair value of $4.6 million in an asset position and $3.2 million in a liability position at December 31, 2017 . The amounts are recorded in other assets, and accrued expenses and other liabilities on the Consolidated Balance Sheet at the dates indicated.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	The accounting and reporting policies of Peoples Bancorp Inc. and subsidiaries ("Peoples" refers to Peoples Bancorp Inc. and its consolidated subsidiaries collectively, except where the context indicates the reference relates solely to Peoples Bancorp Inc.) conform to generally accepted accounting principles in the United States of America ("US GAAP") and to general practices within the banking industry. The preparation of the financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Certain items in prior financial statements have been reclassified to conform to the current presentation, which had no impact on net income, total comprehensive income, net cash provided by operating activities or total stockholders' equity.
Consolidation	Consolidation: Peoples' Consolidated Financial Statements include subsidiaries in which Peoples has a controlling financial interest, principally defined as owning a voting interest of greater than 50%. In addition, entities not controlled by voting interest or in which the equity investors do not bear the residual economic risks, but for which Peoples is the primary beneficiary are also consolidated. The Consolidated Financial Statements include the accounts of Peoples and its consolidated subsidiaries, Peoples Bank and Peoples Investment Company, along with their wholly-owned subsidiaries, and NB&T Statutory Trust III, for which Peoples holds all of the common securities. All significant intercompany accounts and transactions have been eliminated.
Cash and Cash Equivalents	Cash and Cash Equivalents: Cash and cash equivalents include cash on hand, balances due from other banks, interest-bearing deposits in other banks, federal funds sold and other short-term investments with original maturities of ninety days or less. Peoples had no restricted funds at December 31, 2018 and $1.0 million of restricted funds at December 31, 2017, in interest-bearing deposits in other banks. which were being used as collateral and not available for withdrawal.
Investment Securities	Investment Securities: Investment securities are recorded initially at cost, which includes premiums and discounts if purchased at other than par or face value. Peoples amortizes premiums and accretes discounts as an adjustment to interest income on a level yield basis. The cost of investment securities sold, and any resulting gain or loss, is based on the specific identification method and recognized as of the trade date. Management determines the appropriate classification of investment securities at the time of purchase. Held-to-maturity securities are those securities that Peoples has the positive intent and ability to hold to maturity and are recorded at amortized cost. Available-for-sale securities are those securities that would be available to be sold in the future in response to Peoples' liquidity needs, changes in market interest rates, and asset-liability management strategies, among other considerations. Available-for-sale securities are reported at fair value, with unrealized gains and losses reported in total stockholders' equity as a separate component of accumulated other comprehensive income or loss, net of applicable deferred income taxes. Certain restricted equity investment securities that do not have readily determinable fair values and for which Peoples does not exercise significant influence, are carried at cost. These cost method securities are reported in other investment securities on the Consolidated Balance Sheets and consist primarily of shares of the Federal Home Loan Bank of Cincinnati (the "FHLB") and the Federal Reserve Bank of Cleveland (the "FRB"). Management systematically evaluates investment securities for other-than-temporary declines in fair value on a quarterly basis. This analysis requires management to consider various factors, which include (1) the duration and magnitude of the decline in value, (2) the financial condition of the issuer or issuers, and (3) the structure of the security. An impairment loss is recognized in earnings only when (1) Peoples intends to sell the debt security, (2) it is more likely than not that Peoples will be required to sell the security before recovery of its amortized cost basis, or (3) Peoples does not expect to recover the entire amortized cost basis of the security. In situations where Peoples intends to sell or when it is more likely than not that Peoples will be required to sell the security, the entire impairment loss must be recognized in earnings. In all other situations, only the portion of the impairment loss representing the credit loss must be recognized in earnings, with the remaining portion being recognized in total stockholders' equity as a component of accumulated other comprehensive income, net of applicable deferred income taxes.
Fair Value Measurements	Fair Value Measurements: The measurement of fair value under US GAAP uses a hierarchy intended to maximize the use of observable inputs and minimize the use of unobservable inputs. This hierarchy uses three levels of inputs to measure the fair value of assets and liabilities as follows: Level 1: Quoted prices in active exchange markets for identical assets or liabilities; also includes certain U.S. Treasury and other U.S. government and agency securities actively traded in over-the-counter markets. Level 2: Observable inputs other than Level 1 including quoted prices for similar assets or liabilities, quoted prices in less active markets, or other observable inputs that can be corroborated by observable market data; also includes derivative contracts whose value is determined using a pricing model with observable market inputs or can be derived principally from, or corroborated by, observable market data. This category generally includes certain U.S. government and agency securities, corporate debt securities, derivative instruments, and residential mortgage loans held for sale. Level 3: Unobservable inputs supported by little or no market activity for financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation; also includes observable inputs for single dealer nonbinding quotes not corroborated by observable market data. This category generally includes certain private equity investments, retained interests from securitizations, and certain collateralized debt obligations.
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase ("Repurchase Agreements"): Peoples enters into Repurchase Agreements with customers and other financial service companies, which are considered financings. As such, these obligations are recorded as a liability on the Consolidated Balance Sheets and disclosed in Note 8 Short-Term Borrowings and Note 9 Long-Term Borrowings, as appropriate. Securities pledged as collateral under Repurchase Agreements are included in investment securities on the Consolidated Balance Sheets and are disclosed in Note 3 Investment Securities. The fair value of the collateral pledged to a third party is continually monitored and additional collateral is pledged or returned, as deemed appropriate.
Loans and Loans Held-For-Sale	Loans: Loans originated that Peoples has the positive intent and ability to hold for the foreseeable future or to maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs, charge-offs and an allowance for loan losses. The foreseeable future is based upon current market conditions and business strategies, as well as balance sheet management and liquidity. As the conditions change, so may management's view of the foreseeable future. Net deferred loan origination costs were $ 9.5 million and $ 7.5 million at December 31, 2018 and 2017 , respectively. A loan is considered impaired when information and events indicate it is probable that collection of all contractual principal and interest payments is doubtful. Impairment is evaluated collectively for smaller balance loans of a similar nature, primarily consumer and residential real estate loans, and on an individual loan basis for all loans to borrowers with an aggregate unpaid principal balance in excess of $1 million , for which an annual evaluation is performed for possible credit deterioration. This loan review process provides Peoples with opportunities to identify potential problem loans and take proactive actions to assure repayment of the loan or minimize Peoples' risk of loss, such as reviewing the relationship more frequently based upon the loan quality rating and aggregate debt outstanding. Upon detection of the reduced ability of a borrower to meet cash flow obligations, the loan is reviewed for possible downgrade or placement on nonaccrual status. Loan relationships whose aggregate debt to Peoples is equal to or less than $1 million are reviewed on an event driven basis. Peoples also completes evaluation procedures for a selection of larger loan relationships on a quarterly basis. Triggers for review include knowledge of adverse events affecting the business, receipt of financial statements indicating deteriorating credit quality and other events. Peoples typically places any loan deemed to be impaired on nonaccrual status and allocates a specific portion of the allowance for loan losses, if necessary, to reduce the net carrying value of the loan to its estimated net realizable value. Impaired loans, or portions thereof, are charged off when deemed uncollectable. Upon detection of the reduced ability of a borrower to meet cash flow obligations, consumer and residential real estate loans typically are charged down to the net realizable value, with the residual balance placed on nonaccrual status. Loans acquired in a business combination that have evidence of deterioration of credit quality, commonly referred to as "purchased credit impaired" loans, since origination and for which it is probable, at acquisition, that Peoples will be unable to collect all contractually required payments are initially recorded at fair value (the present value of the amounts expected to be collected) with no valuation allowance. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan is recognized as interest income on a level yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition are not recognized. Over the life of these acquired loans, management continues to monitor each acquired purchased credit impaired loan portfolio for changes in credit quality. Increases in expected cash flows subsequent to acquisition are recognized prospectively over the remaining life of the acquired purchased credit impaired loans as a yield adjustment on the loans. Subsequent decreases in expected cash flows are recognized as an impairment, with the amount of the expected loss included in provision for loan losses in the period in which it is identified, and establishes an allowance for loan losses for the expected losses. These purchased credit impaired loans are considered to be accruing and performing even though collection of contractual payments on the loans may be in doubt, as income continues to be accreted as long as expected cash flows can be reasonably estimated. Loans acquired in a business combination that are not impaired are recorded at fair value, with no valuation allowance, and the difference between the acquisition date fair value and the contractual amounts due at the acquisition date represents the discount or premium to a loan's cost basis and is accreted or amortized to interest income over the loan's remaining life using the level yield method. Subsequent to the acquisition date, the method utilized to estimate the required allowance for loan losses for these loans is similar to originated loans; however, Peoples records a provision for loan losses only when the required allowance exceeds the remaining fair value adjustment. Loans Held for Sale: Loans originated and intended to be sold in the secondary market, generally one-to-four family residential loans, are carried at the lower of cost or estimated fair value determined on an aggregate basis. Gains and losses on sales of loans held for sale are included in mortgage banking income. Loans originated with the intent to be held in the portfolio are subsequently transferred to held for sale when a decision is made to sell these loans. At the time of a loan's transfer to the held for sale classification, the loan is recorded at the lower of cost or its fair value. Any reduction in the loan's fair value is reflected as a write-down of the recorded investment resulting in a new cost basis, with a corresponding charge against the allowance for loan losses. If the fair value of a loan classified as held for sale in subsequent periods is less than its cost basis, the carrying value of the loan is adjusted accordingly, with the corresponding loss recognized in earnings.
Interest Rate Lock Commitments	Interest Rate Lock Commitments: Peoples enters into interest rate lock commitments with borrowers and best efforts commitments with investors on mortgage loans originated for sale into the secondary markets to manage the inherent interest rate and pricing risk associated with selling loans. An interest rate lock commitment generally terminates once the loan is funded, the lock period expires or the borrower decides not to contract for the loan. A best efforts commitment generally terminates once the loan is sold, the commitment period expires or the borrower decides not to contract for the loan. These commitments are considered derivatives, which are generally accounted for by recognizing their estimated fair value on the Consolidated Balance Sheets as either an other asset or an other liability. The valuation of such commitments does not consider expected cash flows related to the servicing of the future loan. Management has determined these derivatives do not have a material effect on Peoples' financial position, results of operations or cash flows.
Allowance for Loan Losses	Allowance for Loan Losses: The allowance for loan losses is a valuation reserve established through provisions for loan losses charged against income. The allowance for loan losses is maintained at a level that management deems sufficient to absorb probable losses inherent in the loan portfolio. Loans deemed to be uncollectable are charged against the allowance for loan losses, while recoveries of previously charged off amounts are credited to the allowance for loan losses. The allowance for loan losses is comprised of specific valuation allowances for loans evaluated individually for impairment and general allocations for pools of homogeneous loans with similar risk characteristics and trends. Peoples' homogenous loan pools include similarly risk-graded commercial and industrial loans, similarly risk-graded commercial real estate loans, real estate construction loans (both commercial and residential), residential real estate loans, consumer home equity loans, and indirect and other consumer loans. Management's evaluation of the appropriateness of the allowance for loan losses and the related provision for loan losses is based upon a quarterly analysis of the portfolio. While portions of the allowance for loan losses may be allocated to specific loans, the entire allowance for loan losses is available for any loan charged off by management. The allowance for loan losses related to specific loans is based on management's estimate of potential losses on impaired loans as determined by (1) the present value of expected future cash flows, (2) the fair value of collateral if the loan is determined to be collateral dependent, or (3) the loan's observable market price. The general allocations to specific loan pools are based on the historical loss rates for specific loan types and the internal risk grade, if applicable, adjusted for both internal and external qualitative risk factors. The calculation of historical loss rates for pools of similar loans with similar characteristics is based upon the proportion of actual charge-offs experienced to the total population of loans in the pool. The historical loss rates are periodically updated based on actual charge-off experience. The qualitative economic and business conditions and developments that affect the collectibility of the portfolio, including the condition of various market segments, which are considered by management include, among other factors, (1) changes in international, national, regional and local economic and business conditions, (2) changes in asset quality, (3) changes in loan portfolio volume, (4) the composition and concentrations of credit, (5) changes in the value of underlying collateral due to economic or market conditions, and (6) effectiveness of Peoples' loan policies, procedures and internal controls. The allowance for loan losses established for each homogenous loan pool represents the product of the historical loss rate, adjusted for qualitative factors, and the total dollar amount of the loans in the pool. Peoples categorizes loans involving commercial borrowers into risk categories based upon an established grading matrix. This system is used to manage the risk within its commercial lending activities, evaluate changes in the overall credit quality of the loan portfolio and evaluate the appropriateness of the allowance for loan losses. Loan grades are assigned at the time a new loan or lending commitment is extended by Peoples and may be changed at any time when circumstances warrant. Loans to borrowers with an aggregate unpaid principal balance in excess of $1 million are reviewed on an annual basis for possible credit deterioration. Loan relationships whose aggregate credit exposure to Peoples is equal to or less than $1 million are reviewed on an event driven basis. Triggers for review include knowledge of adverse events affecting the borrower's business, receipt of financial statements indicating deteriorating credit quality or other similar events. Adversely classified loans are generally reviewed on a quarterly basis. The primary factors considered when assigning a risk grade to a loan include (1) reliability and sustainability of the primary source of repayment, (2) past, present and projected financial condition of the borrower, and (3) current economic and industry conditions. Other factors that could influence the risk grade assigned include the type and quality of collateral and the strength of guarantors. The primary source of repayment for commercial real estate loans and commercial and industrial loans is normally the operating cash flow of the business available to repay debt. Management's analysis of operating cash flow for commercial real estate loans secured by non-owner occupied properties takes into account factors such as rent rolls and vacancy statistics. Management's analysis of operating cash flow for commercial real estate loans secured by owner occupied properties and all commercial and industrial loans considers the profitability, liquidity and leverage of the business. The evaluation of construction loans includes consideration of the borrower's ability to complete construction within the established budget. The primary factors considered when classifying residential real estate, home equity lines of credit and consumer loans include the loan's past due status and declaration of bankruptcy by the borrower(s). The classification of residential real estate and home equity lines of credit also takes into consideration the current value of the underlying collateral.
Troubled Debt Restructuring	Troubled Debt Restructuring ("TDR"): The restructuring of a loan is considered a TDR if both (1) the borrower is experiencing financial difficulties and (2) the creditor has granted a concession. Loans acquired that are restructured after acquisition are not considered TDRs if the loans evidenced credit deterioration as of the acquisition date and are accounted for in pools of purchased credit impaired loans. In assessing whether or not a borrower is experiencing financial difficulties, Peoples considers information currently available regarding the financial condition of the borrower. This information includes, but is not limited to, whether (1) the borrower is currently in payment default on any of the borrower's debt; (2) a payment default is probable in the foreseeable future without the modification; (3) the borrower has declared or is in the process of declaring bankruptcy; and (4) the borrower's projected cash flow is insufficient to satisfy contractual payments due under the original terms of the loan without a modification. Peoples considers all aspects of the modification to loan terms to determine whether or not a concession has been granted to the borrower. Key factors considered by Peoples include the borrower's ability to access funds at a market rate for loans with similar risk characteristics, the significance of the modification relative to the unpaid principal loan balance or collateral value underlying the loan, and the significance of a delay in the timing of payments relative to the original contractual terms of the loan. The most common concessions granted by Peoples generally include one or more modifications to the terms of the loan, such as (1) a reduction in the interest rate for the remaining life of the loan, (2) an extension of the maturity date at an interest rate lower than the current market rate for a new loan with similar risk, (3) a temporary period of interest-only payments, and (4) a reduction in the contractual payment amount for either a short period or the remaining term of the loan. All TDRs are considered impaired loans and are evaluated individually to determine if a write-down is required and if they should be on accrual or nonaccrual status.
Bank Premises and Equipment	Bank Premises and Equipment: Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on the straight-line method over the estimated useful lives of the related assets owned. Major improvements to leased facilities are capitalized and included in bank premises at cost less accumulated depreciation, which is calculated on the straight-line method over the lesser of the remaining term of the leased facility or the estimated economic life of the improvement.
Investments in Affordable Housing Limited Partnerships	Investments in Affordable Housing Limited Partnerships: Investments in affordable housing consist of investments in limited partnerships that operate qualified affordable housing projects or that invest in other limited partnerships formed to operate affordable housing projects. These investments are considered variable interest entities for which Peoples is not the primary beneficiary. Peoples generally utilizes the effective yield method to account for these investments with the tax credits, net of the amortization of the investment, reflected in the Consolidated Statements of Income as a reduction in income tax expense. The unamortized amount of the investments is recorded in other assets and totaled $ 9.6 million and $ 4.7 million at December 31, 2018 and 2017 , respectively.
Other Real Estate Owned	Other Real Estate Owned ("OREO"): OREO, included in other assets on the Consolidated Balance Sheets, is comprised primarily of commercial and residential real estate properties acquired by Peoples in satisfaction of a loan. OREO obtained in satisfaction of a loan is recorded at the lower of cost or estimated fair value, less estimated costs to sell the property. Peoples had OREO totaling $ 94,000 at December 31, 2018 and $208,000 at December 31, 2017 .
Business Combinations Policy	Business Combinations: Business combinations are accounted for using the acquisition method of accounting. Under this accounting method, the acquired company's net assets are recorded at fair value on the date of acquisition, and the results of operations of the acquired company are combined with Peoples' from the acquisition date forward. Costs related to the acquisition are expensed as incurred. The purchase price paid over the fair value of the net assets acquired, including intangible assets with finite lives, is recorded as goodwill.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets: Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired in the business combination. Goodwill is not amortized but is tested for impairment when indicators of impairment exist, or at least annually on October 1. Based upon the most recently completed goodwill impairment test, Peoples concluded the recorded value of goodwill was not impaired as of December 31, 2018 , based upon the estimated fair value of Peoples' single reporting unit. Peoples' other intangible assets include customer relationship intangible assets, core deposit intangible assets and servicing rights representing the net present value of future economic benefit to be earned from acquired customer relationships with definite useful lives. These intangible assets are amortized on an accelerated basis over their estimated lives ranging from 7 to 10 years.
Servicing Rights	Servicing Rights: Servicing rights represent the right to service loans sold to third-party investors. Loans that are sold are primarily mortgage loans, but also include small business and agricultural loans. Servicing rights are recognized separately as a servicing asset or liability whenever Peoples undertakes an obligation to service financial assets. Servicing rights are reported in other intangible assets on the Consolidated Balance Sheets. Serviced loans that have been completely sold are not included on the Consolidated Balance Sheets. Loan servicing income included in mortgage banking income includes servicing fees received from the third-party investors and certain charges collected from the borrowers. Peoples initially records servicing rights at fair value at the time of the sale of the loans to the third-party investor. Peoples follows the amortization method for the subsequent measurement of each class of separately recognized servicing assets and liabilities. Under the amortization method, Peoples amortizes the value of servicing assets or liabilities in proportion to, and over the period of, estimated net servicing income or net servicing loss, and assesses servicing assets or liabilities for impairment or increased obligation based on the fair value at each reporting date. The fair value of the servicing rights is determined by using a discounted cash flow model, which estimates the present value of the future net cash flows of the servicing portfolio based on various factors, such as servicing costs, expected prepayment speeds and discount rates.
Trust Assets Under Management	Trust Assets Under Administration and Management: Peoples manages certain assets held in a fiduciary or agency capacity for customers. These assets under administration and management, other than cash on deposit at Peoples, are not included in the Consolidated Balance Sheets since they are not assets of Peoples.
Interest Income Recognition	Interest Income Recognition: Interest income on loans and investment securities is recognized by methods that result in level rates of return on principal amounts outstanding, including yield adjustments resulting from the amortization of loan costs and premiums on investment securities, and accretion of loan fees and discounts on investment securities. Since mortgage-backed securities comprise a sizable portion of Peoples' investment portfolio, a significant increase in principal payments on those securities can impact interest income due to the corresponding acceleration of premium amortization or discount accretion. Peoples discontinues the accrual of interest on a loan when conditions cause management to believe collection of all or any portion of the loan's contractual interest is doubtful. Such conditions may include the borrower being 90 days or more past due on any contractual payments, or current information regarding the borrower's financial condition and repayment ability. All unpaid accrued interest deemed uncollectable is reversed, which reduces Peoples' net interest income. Interest received on nonaccrual loans is included in income only if principal recovery is reasonably assured.
Revenue Recognition	Revenue Recognition: Peoples recognizes revenues as they are earned based on contractual terms, or as services are provided and collectability is reasonably assured. Peoples’ principal source of revenue is interest income, which is recognized on an accrual basis primarily according to formulas in written contracts, such as loan agreements or securities contracts. As of January 1, 2018, Peoples adopted ASU 2014-09 - Revenue from Contracts with Customers (Topic 606), and all subsequent updates that modified Accounting Standards Codification ("ASC") 606. Peoples elected to adopt this new accounting guidance using the modified retrospective approach. The modified retrospective approach uses a cumulative-effect adjustment to retained earnings to reflect uncompleted contracts in the initial application of the guidance. As of January 1, 2018, Peoples recorded a cumulative-effect adjustment for uncompleted contracts, which resulted in a reduction to retained earnings and an increase in accrued expenses and other liabilities of $3.7 million , which was net of federal income taxes. The impact during 2018 was an increase in insurance income and a decrease in retained earnings of $369,000 as a result of applying ASC 606. Prior period amounts are not adjusted and continue to be reported under the accounting standards in effect for those respective periods. Estimates of variable consideration are included in revenue to the extent that it is probable that a significant reversal of cumulative revenue will not occur, once the uncertainty is resolved. Peoples' contracts with customers are short-term in nature, and are recognized under the following revenue streams: Insurance Income: Insurance income generally consists of commissions and fees from the sale of insurance policies, fees related to third-party administration services and performance-based commissions from insurance companies. Peoples recognizes commission income from the sale of insurance policies when it acts as an agent between the insurance carrier and policyholder, arranging for the insurance carrier to provide policies to policyholders, and acts on behalf of the insurance carrier by providing customer service to the policyholders during the respective policy periods. Commission income is recognized over time, using the output method of time elapsed, which corresponds with the underlying insurance policy period, for which Peoples is obligated to perform under contract with the insurance carrier. Commission income is variable, as it is comprised of a certain percentage of the underlying policy premium. Peoples estimates the variable consideration based upon the "most likely amount" method, and does not expect or anticipate a significant reversal of revenue in future periods, based upon historical experience. Payment is due from the insurance carrier for commission income once the insurance policy has been sold. Peoples has elected to apply a practical expedient related to capitalizable costs, which are the commissions paid to insurance producers, and will expense these commissions paid to insurance producers as incurred, as these costs are related to the commission income and would have been amortized within one year or less if they had been capitalized, the same period over which the commission income was earned. Fees related to third-party administration services performed are recognized over time, during the period in which services have been provided, and are recognized monthly in the month the services were performed. Performance-based commissions from insurance companies are recognized at a point in time, when received, and no contingencies remain. Trust and Investment Income: Trust and investment income consists of revenue from fiduciary and brokerage activities, which includes fees for services such as asset management, record keeping, retirement services and estate management, and investment commissions and fees related to the sale of investments. Trust and investment income is recognized over time, which reflects the duration of the contract period for which services have been provided. Trust and investment income is variable as it is based on the value of assets under administration and management, and specific transactions. Peoples estimates the variable consideration based upon the most likely amount method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer when billed, which is typically a monthly or quarterly billing for services rendered in the most recent period, for which the performance obligation has been satisfied. Peoples has elected to apply a practical expedient of right to invoice when recognizing trust and investment income, as Peoples has fulfilled the performance obligation, the customer has consumed the service, and Peoples has a right to the related income. Peoples has also elected to apply a practical expedient related to capitalizable costs, which are the commissions paid to financial advisors, and will expense these commissions paid to financial advisors as incurred, as these costs are related to the trust and investment income and would have been amortized within one year or less if they had been capitalized, the same period over which the income was earned. Electronic Banking Income: Electronic banking income consists of two revenue streams related to interchange income, and promotional and usage income. Peoples recognizes interchange income over time, on a monthly basis, which is based on the transactional volume of debit card activity completed by its customers during the month in which income is recognized. Peoples is obligated, based on its contracts with third parties, to meet certain volumes of debit card activities, which are performed by Peoples' customers, over a certain period of time. Interchange income is variable as it is based on the transaction volume of debit card activity completed by Peoples' customers. Peoples estimates the variable consideration based upon the most likely amount method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the vendor within one month of the completed customer debit card activity. Peoples has elected to apply a practical expedient of right to invoice when recognizing interchange income, as Peoples has fulfilled the required performance obligations, the vendor has consumed the service, and Peoples has a right to the related income. Peoples also recognizes promotional and usage income over time, on a monthly basis, which is related to branding of debit cards and promotion or use of certain services provided by third-party vendors. Peoples is obligated to brand its debit cards in a certain manner, and promote and use services provided by third-party vendors. Promotional and usage income is variable as it is based on certain metrics achieved for promotion and usage of services provided by the third-party vendors. Peoples estimates the variable consideration based upon the most likely amount method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the third-party vendors within 45 days of the monthly fulfillment of Peoples' performance obligation. Peoples has elected to apply a practical expedient of right to invoice when recognizing promotional and usage income, as Peoples has fulfilled the required performance obligations, the vendor has consumed the service, and Peoples has a right to the related income. Deposit Account Service Charges: Deposit account service charges consist of two revenue streams related to ongoing maintenance fees for deposit accounts and transactional-based fees. Ongoing maintenance fees are recognized on a monthly basis, generally with the monthly period beginning on the day of the month on which the account was opened. Ongoing maintenance fee income is variable as these fees can be reduced if a customer meets certain qualifying metrics. Peoples estimates the variable consideration based upon the most likely amount method, and does not expect or anticipate a significant reversal of revenue in future periods. For accounts that are assessed maintenance fees through the account analysis process, payment is due from the customer within one month after the monthly period in which the account activity occurred. For all other accounts, monthly maintenance fees are assessed to the account on the last day of the monthly period. Peoples has elected to apply a practical expedient of right to invoice when recognizing ongoing maintenance fees for deposit accounts, as Peoples has fulfilled the required performance obligations, the customer has consumed the service, and Peoples has a right to the related income. Transactional-based fees are recognized at a point in time, which is at the completion of the relevant transaction. Peoples is obligated to perform certain transactions as requested by its consumer and business deposit account customers, which are outside of the normal maintenance requirements. Transactional-based fee income is variable as these fees are directly related to a service request from the customer. Peoples estimates the variable consideration based upon the most likely amount method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer at the time of completion of the requested transaction. Commercial Loan Swap Fees: Commercial loan swap fees consist of income related to transactions in which Peoples acts as an agent between a third-party vendor and certain Peoples' commercial loan customers for which an interest rate swap occurs. Commercial loan swap fees are recognized at a point in time, when the transaction has been completed, and there is no recourse or further performance obligation required of Peoples. Commercial loan swap fee income is variable as these fees are a certain percentage of the total swap fee collected on a completed transaction. Peoples estimates the variable consideration based upon the most likely amount method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer at the time of completion of the requested transaction. Other Non-Interest Income: Other non-interest income includes certain revenues that are transactional-based, such as wire transfer fees, money order fees and other ancillary fees or services. These transactional-based fees are recognized as income at a point in time, at the completion of the relevant transaction. Transactional-based fee income is variable as these fees are directly related to a service request from the customer. Peoples estimates the variable consideration based upon the most likely amount method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer at the time of completion of the requested transaction.
Income Taxes	Income Taxes: Peoples and its subsidiaries file a consolidated federal income tax return. Deferred income tax assets and liabilities are provided as temporary differences between the tax basis of an asset or liability and its reported amount in the Consolidated Financial Statements at the statutory federal corporate income tax rate. A valuation allowance, if needed, reduces deferred tax assets to the expected amount most likely to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. The Tax Cuts and Jobs Act (the "Act") was enacted on December 22, 2017, and Peoples' Consolidated Financial Statements fully reflect the impact of the Act as of December 31, 2018. As a result of the final impact of this guidance, Peoples recorded a reduction to income tax expense of $0.7 million during 2018. At December 31, 2017, Peoples had completed the accounting for the tax effects of enactment of the Act; however, in certain cases, Peoples made reasonable estimates of the effects of a reduced statutory federal corporate income tax rate on its existing deferred tax balances. Peoples also early adopted and retrospectively applied the reclassification of stranded income tax effects from accumulated other comprehensive loss to retained earnings as of December 31, 2017, as permitted by ASU 2018-02. A tax position is initially recognized in the financial statements when it is more likely than not the position will be sustained upon examination by the tax authorities. Such tax positions are initially and subsequently measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with the tax authority assuming full knowledge of the position and all relevant facts. Penalties and interest incurred under the applicable tax law are classified as income tax expense. The amount of Peoples' uncertain income tax positions and unrecognized benefits are disclosed in Note 12 Income Taxes.
Advertising Costs	Advertising Costs: Advertising costs are expensed as incurred.
Earnings Per Share	Earnings per Share ("EPS"): Basic and diluted EPS are calculated using the two-class method since Peoples has issued share-based payment awards considered participating securities because they entitle holders the rights to dividends during the vesting term. The two-class method is an earnings allocation formula that determines net income per share for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. Basic EPS is computed by dividing net earnings allocated to common shareholders by the weighted-average number of common shares outstanding. Diluted EPS is computed by dividing net earnings allocated to common shareholders by the weighted-average number of common shares outstanding adjusted to include the effect of potentially dilutive common shares. Potentially dilutive common shares include incremental common shares issuable upon exercise of outstanding stock appreciation rights and non-vested restricted common shares using the treasury stock method.
Operating Segments	Operating Segments: Peoples' business activities are currently confined to one reporting unit and reportable segment, which is community banking. As a community banking entity, Peoples offers its customers a full range of products including a complete line of banking, insurance, investment and trust solutions.
Stock-Based Compensation	Stock-Based Compensation: Stock-based compensation for restricted stock awards is measured at the fair value of these awards on their grant date. Stock-based compensation is recognized over the restriction period for restricted stock awards. Only the expense for the portion of the awards expected to vest is recognized. For service-based awards, stock-based compensation for awards granted to employees who are eligible for retirement is recognized to the date the employee is first eligible to retire.
New Accounting Pronouncements	New Accounting Pronouncements: From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that are adopted by Peoples as of the required effective dates. Unless otherwise discussed, management believes the impact of any recently issued standards, including those issued but not yet effective, will not have a material impact on Peoples' financial statements taken as a whole. ASU 2018-15 - Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): The amendments in this update align 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. This ASU will become effective for interim and annual reporting periods beginning after December 15, 2019 (effective January 1, 2020 for Peoples). Peoples is currently evaluating the impact of this update. ASU 2018-14 - Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): This update modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. This update will remove some current disclosure requirements and require an explanation of the reasons for significant gains and losses related to changes in the benefit obligation, the projected benefit obligation and fair value of plan assets for plans with projected benefit obligations in excess of plan assets, and the accumulated benefit obligation and fair value of plan assets for plans with accumulated benefit obligations in excess of plan assets. This ASU will become effective for interim and annual reporting periods beginning after December 15, 2020 (effective January 1, 2021 for Peoples). Peoples is currently reviewing the new disclosure requirements in this update and will adopt this new accounting guidance as required. ASU 2018-13 - Fair Value Measurement (Topic 820): The amendment in this update removes, modifies and adds to required disclosures related to certain fair value measurements. This ASU will become effective for interim and annual reporting periods beginning after December 15, 2019 (effective January 1, 2020 for Peoples). Peoples is currently reviewing the new disclosure requirements in this update and will adopt this new accounting guidance as required. ASU 2018-07 - Compensation - Stock Compensation (Topic 718): This update has been issued as part of a simplification initiative, which will expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from non-employees and improve aspects of the accounting for non-employee share-based payment transactions. The amendments will be effective for interim and annual reporting periods beginning after December 15, 2018 (effective January 1, 2019 for Peoples). Peoples adopted this new accounting guidance as required, and it will not have a material impact on Peoples' consolidated financial statements. ASU 2018-05 - Income Taxes (Topic 740): The amendments in this ASU clarify required disclosures in situations where a registrant does not have the necessary information available, prepared, or analyzed in reasonable detail to complete the accounting under ASC 740 for certain income tax effects of the Tax Cuts and Jobs Act for the reporting period. As of December 31, 2018, Peoples completed the accounting for the income tax effects of the enactment of the Tax Cuts and Jobs Act, resulting in a reduction to income tax expense of $0.7 million during 2018. ASU 2018-02 - Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. Peoples early adopted ASU 2018-02, reclassifying income tax effects of the Tax Cuts and Jobs Act of $0.9 million from accumulated other comprehensive loss to retained earnings as of December 31, 2017. ASU 2017-12 - Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The objective of the amendments in this ASU is to better align an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships, and the presentation of hedge results. To meet that objective, the amendments expand and refine hedge accounting for both nonfinancial and financial risk components, and align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The FASB issued an update in October of 2018, in order to facilitate the London Interbank Offered Rate ("LIBOR") to Secured Overnight Financing Rate transition and provide lead time for entities to prepare for changes to interest rate risk hedging strategies for both risk management and hedge accounting purposes. The amendments will be effective for interim and annual reporting periods beginning after December 15, 2018 (effective January 1, 2019 for Peoples). As of December 31, 2018, Peoples was party to cash flow hedges in an effort to manage interest rate risk, which are relatively low complexity hedges, and Peoples does not intend to enter into highly complex derivative or hedging arrangements. ASU 2017-04 - Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The amendments in this ASU simplify how an entity is required to test goodwill for impairment by eliminating the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. This accounting guidance will be effective for interim and annual reporting periods beginning after December 15, 2019 (effective January 1, 2020 for Peoples). Peoples will early adopt this new accounting guidance as of January 1, 2019, and it will be incorporated in the October 1, 2019 annual goodwill impairment analysis, but it is not expected to have a material impact on Peoples' consolidated financial statements. ASU 2016-13 - Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This accounting guidance replaces the current "incurred loss" model for recognizing credit losses with an "expected loss" model, referred to as the Current Expected Credit Loss ("CECL") model. Under the CECL model, Peoples will be required to present certain financial assets carried at amortized cost, such as loans held-for-investment and held-to-maturity debt securities, at the net amount expected to be collected. ASU 2018-19 clarified that receivables arising from operating leases are not within the scope of Subtopic 326-20, and should be accounted for according to Topic 842. The measurement of expected credit losses is to be based on information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. This measurement will take place at the time the financial asset is first added to the balance sheet and periodically thereafter. This differs significantly from the "incurred loss" model required under current US GAAP, which delays recognition until it is probable a loss has been incurred. Accordingly, Peoples expects that the adoption of the CECL model will materially affect how the allowance for loan losses is determined and could require significant increases to the allowance for loan losses. Moreover, the CECL model may create more volatility in the level of Peoples' allowance for loan losses. If required to materially increase the level of allowance for loan losses for any reason, such increase could adversely affect Peoples' business, financial condition and results of operations. The new CECL standard will become effective for interim and annual reporting periods beginning after December 15, 2019 (effective January 1, 2020 for Peoples). Peoples has a committee that meets regularly to monitor progress and oversee the project. Peoples has implemented a third-party software solution, and will utilize the tool to run test calculations throughout 2019 in anticipation of the full implementation at the beginning of 2020. Peoples will complete model validation during 2019, and is currently refining the economic forecasting process, documenting accounting policies, reviewing business processes and evaluating potential changes to the control environment. Peoples is presently evaluating the impact that the CECL model will have on Peoples' financial statements and expects to recognize a one-time cumulative-effect adjustment to the allowance for loan loss provision as of the beginning of the first reporting period in which the new standard is effective, consistent with regulatory expectations set forth in interagency guidance issued at the end of 2016. Peoples is currently evaluating the potential impact at adoption, which will depend on relevant data at the adoption date, including the characteristics of the loan portfolio, macroeconomic conditions and forecasts. Peoples has not yet determined the magnitude of any such one-time cumulative-effect adjustment or of the overall impact of the new standard on Peoples' financial condition or results of operations. ASU 2016-02 - Leases (Topic 842): The amendments in this ASU were issued to improve the financial reporting of leasing activities and provide a faithful representation of leasing transactions and improve understanding and comparability of a lessee's financial statements. Under ASU 2016-02 and the related updates, a lessee will be required to recognize assets and liabilities for leases with terms of more than 12 months. These ASUs will become effective for interim and annual reporting periods affected beginning after December 15, 2018 (effective January 1, 2019 for Peoples). Peoples has identified the population of leases that will be impacted by ASU 2016-02, and assessed the impact of the guidance provided in the subsequent updates, and will adopt this new accounting guidance as required. Peoples will use the modified retrospective approach at implementation. Peoples recorded the right-of-use asset on January 1, 2019, which was approximately $5.2 million , and a lease liability of approximately $5.3 million .

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Assets measured on recurring basis	Recurring Fair Value Measurements at Reporting Date December 31, 2018 December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Available-for-sale investment securities: Obligations of: States and political subdivisions $ — $ 88,587 $ — $ — $ 101,569 $ — Residential mortgage-backed securities — 692,608 — — 673,664 — Commercial mortgage-backed securities — 6,707 — — 6,976 — Bank-issued trust preferred securities — 3,989 — — 5,129 — Equity investment securities (a) — — — 7,694 155 — Total available-for-sale securities $ — $ 791,891 $ — $ 7,694 $ 787,493 $ — Equity investment securities (a) $ 94 $ 183 $ — $ — $ — $ — Derivative assets (b) — 4,544 — — 4,594 — Liabilities: Derivative liabilities (c) $ — $ 3,562 $ — $ — $ 3,241 $ — (a) As of January 1, 2018, Peoples adopted ASU 2016-01, resulting in the reclassification of equity investment securities from available-for-sale investment securities to other investment securities. As of December 31, 2017, equity investment securities had a net unrealized gain of $6.5 million . (b) Included in other assets on the Consolidated Balance Sheets. For additional information, see Note 14 Derivative Financial Instruments. (c) Included in other liabilities on the Consolidated Balance Sheets. For additional information, see Note 14 Derivative Financial Instruments.
Fair Values of Financial Assets and Liabilities on Balance Sheets	Fair Value Measurements of Other Financial Instruments (Dollars in thousands) Fair Value Hierarchy Level December 31, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value Assets: Cash and cash equivalents 1 $ 77,612 $ 77,612 $ 72,194 $ 72,194 Held-to-maturity investment securities: Obligations of: States and political subdivisions 2 4,403 4,896 3,810 4,417 Residential mortgage-backed securities 2 29,044 28,603 32,487 32,227 Commercial mortgage-backed securities 2 3,514 3,464 4,631 4,569 Total held-to-maturity securities 36,961 36,963 40,928 41,213 Other investment securities: FHLB stock 2 29,367 29,367 28,132 28,132 FRB stock 2 12,294 12,294 10,179 10,179 Nonqualified deferred compensation (a) 2 987 987 — — Federal Home Loan Mortgage Corp ("FHLMC") stock 2 60 60 60 60 Other investment securities (b) 42,708 42,708 38,371 38,371 Net loans 3 2,708,583 2,907,537 2,338,344 2,274,194 Loans held for sale 2 5,470 5,492 2,510 2,569 Bank owned life insurance 3 68,934 68,934 62,176 62,176 Servicing rights (c) 3 2,655 4,568 2,305 3,866 Financial liabilities: Deposits 2 $ 2,955,465 $ 2,953,452 $ 2,730,330 $ 2,730,071 Short-term borrowings 2 356,198 349,994 209,491 209,628 Long-term borrowings 2 109,644 101,736 144,019 142,108

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Investment Disclosures
Summary of Available-for-sale Investment Securities	Available-for-sale The following table summarizes Peoples’ available-for-sale investment securities at December 31: (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value 2018 Obligations of: States and political subdivisions $ 88,358 $ 787 $ (558 ) $ 88,587 Residential mortgage-backed securities 705,289 2,720 (15,401 ) 692,608 Commercial mortgage-backed securities 6,812 — (105 ) 6,707 Bank-issued trust preferred securities 4,196 75 (282 ) 3,989 Total available-for-sale securities $ 804,655 $ 3,582 $ (16,346 ) $ 791,891 2017 Obligations of: States and political subdivisions $ 100,039 $ 1,786 $ (256 ) $ 101,569 Residential mortgage-backed securities 684,100 2,582 (13,018 ) 673,664 Commercial mortgage-backed securities 7,004 11 (39 ) 6,976 Bank-issued trust preferred securities 5,195 141 (207 ) 5,129 Equity investment securities (a) 1,394 6,520 (65 ) 7,849 Total available-for-sale securities $ 797,732 $ 11,040 $ (13,585 ) $ 795,187
Schedule of Gross Gains and Losses from Sales of Available-for-sale Securities	The gross gains and gross losses realized by Peoples from sales of available-for-sale securities for the years ended December 31 were as follows: (Dollars in thousands) 2018 2017 2016 Gross gains realized $ 6 $ 2,999 $ 933 Gross losses realized 152 16 3 Net (loss) gain realized $ (146 ) $ 2,983 $ 930
Summary of Available-for-sale Securities with Unrealized Loss	The following table presents a summary of available-for-sale investment securities that had an unrealized loss at December 31: Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Value Unrealized Loss No. of Securities Fair Value Unrealized Loss No. of Securities Fair Value Unrealized Loss 2018 Obligations of: States and political subdivisions $ 10,173 $ 18 17 $ 19,918 $ 540 20 $ 30,091 $ 558 Residential mortgage-backed securities 47,562 226 50 517,335 15,175 170 564,897 15,401 Commercial mortgage-backed securities — — — 6,707 105 3 6,707 105 Bank-issued trust preferred securities — — — 1,718 282 2 1,718 282 Total $ 57,735 $ 244 67 $ 545,678 $ 16,102 195 $ 603,413 $ 16,346 2017 Obligations of: States and political subdivisions $ 16,985 $ 89 18 $ 5,308 $ 167 1 $ 22,293 $ 256 Residential mortgage-backed securities 274,998 3,462 77 291,812 9,556 88 566,810 13,018 Commercial mortgage-backed securities 2,487 23 1 1,274 16 1 3,761 39 Bank-issued trust preferred securities — — — 2,792 207 3 2,792 207 Equity investment securities (a) 276 1 1 112 64 1 388 65 Total $ 294,746 $ 3,575 97 $ 301,298 $ 10,010 94 $ 596,044 $ 13,585
Summary of Held-to-maturity Investment Securities	The following table summarizes Peoples’ held-to-maturity investment securities at December 31: (Dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value 2018 Obligations of: States and political subdivisions $ 4,403 $ 493 $ — $ 4,896 Residential mortgage-backed securities 29,044 191 (632 ) 28,603 Commercial mortgage-backed securities 3,514 — (50 ) 3,464 Total held-to-maturity securities $ 36,961 $ 684 $ (682 ) $ 36,963 2017 Obligations of: States and political subdivisions $ 3,810 $ 607 $ — $ 4,417 Residential mortgage-backed securities 32,487 269 (529 ) 32,227 Commercial mortgage-backed securities 4,631 — (62 ) 4,569 Total held-to-maturity securities $ 40,928 $ 876 $ (591 ) $ 41,213
Available-for-sale securities
Investment Disclosures
Summary of Investment Securities by Contractual Maturity	The table below presents the amortized cost, fair value and total weighted-average yield of available-for-sale securities by contractual maturity at December 31, 2018 . The weighted-average yields are based on the amortized cost. In some cases, the issuers may have the right to call or prepay obligations without call or prepayment penalties prior to the contractual maturity date. (Dollars in thousands) Within 1 Year 1 to 5 Years 5 to 10 Years Over 10 Years Total Amortized cost Obligations of: States and political subdivisions $ 891 $ 15,910 $ 23,094 $ 48,463 $ 88,358 Residential mortgage-backed securities 782 12,194 51,284 641,029 705,289 Commercial mortgage-backed securities — 5,666 — 1,146 6,812 Bank-issued trust preferred securities — — 4,196 — 4,196 Total available-for-sale securities $ 1,673 $ 33,770 $ 78,574 $ 690,638 $ 804,655 Fair value Obligations of: States and political subdivisions $ 888 $ 15,900 $ 23,188 $ 48,611 $ 88,587 Residential mortgage-backed securities 778 12,031 50,164 629,635 692,608 Commercial mortgage-backed securities — 5,587 — 1,120 6,707 Bank-issued trust preferred securities — — 3,989 — 3,989 Total available-for-sale securities $ 1,666 $ 33,518 $ 77,341 $ 679,366 $ 791,891 Total weighted-average yield 2.26 % 2.35 % 2.77 % 2.93 % 2.89 %
Held-to-maturity securities
Investment Disclosures
Summary of Investment Securities by Contractual Maturity	The table below presents the amortized cost, fair value and total weighted-average yield of held-to-maturity securities by contractual maturity at December 31, 2018 . The weighted-average yields are based on the amortized cost. In some cases, the issuers may have the right to call or prepay obligations without call or prepayment penalties prior to the contractual maturity date. (Dollars in thousands) Within 1 Year 1 to 5 Years 5 to 10 Years Over 10 Years Total Amortized cost Obligations of: States and political subdivisions $ — $ 308 $ 2,982 $ 1,113 $ 4,403 Residential mortgage-backed securities — 422 8,027 20,595 29,044 Commercial mortgage-backed securities — — — 3,514 3,514 Total held-to-maturity securities $ — $ 730 $ 11,009 $ 25,222 $ 36,961 Fair value Obligations of: States and political subdivisions $ — $ 308 $ 3,466 $ 1,122 $ 4,896 Residential mortgage-backed securities — 416 8,163 20,024 28,603 Commercial mortgage-backed securities — — — 3,464 3,464 Total held-to-maturity securities $ — $ 724 $ 11,629 $ 24,610 $ 36,963 Total weighted-average yield — % 2.43 % 2.89 % 2.78 % 2.80 %
Summary of Held-to-maturity Securities with Unrealized Loss	The following table presents a summary of held-to-maturity investment securities that had an unrealized loss at December 31: Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Value Unrealized Loss No. of Securities Fair Value Unrealized Loss No. of Securities Fair Value Unrealized Loss 2018 Residential mortgage-backed securities $ — $ — — $ 13,102 $ 632 5 $ 13,102 $ 632 Commercial mortgage-backed securities — — — 3,464 50 1 3,464 50 Total $ — $ — — $ 16,566 $ 682 6 $ 16,566 $ 682 2017 Residential mortgage-backed securities $ 1,476 $ 4 2 $ 12,098 $ 525 3 $ 13,574 $ 529 Commercial mortgage-backed securities — — — 4,569 62 1 4,569 62 Total $ 1,476 $ 4 2 $ 16,667 $ 587 4 $ 18,143 $ 591

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loan Classification by Type	The major classifications of loan balances (in each case, net of deferred fees and costs), excluding loans held for sale, were as follows at December 31: (Dollars in thousands) 2018 2017 Originated loans: Commercial real estate, construction $ 124,013 $ 107,118 Commercial real estate, other 632,200 595,447 Commercial real estate 756,213 702,565 Commercial and industrial 530,207 438,051 Residential real estate 296,860 304,523 Home equity lines of credit 93,326 88,902 Consumer, indirect 407,167 340,390 Consumer, direct 71,674 67,010 Consumer 478,841 407,400 Deposit account overdrafts 583 849 Total originated loans $ 2,156,030 $ 1,942,290 Acquired loans: Commercial real estate, construction $ 12,404 $ 8,319 Commercial real estate, other 184,711 165,120 Commercial real estate 197,115 173,439 Commercial and industrial 35,537 34,493 Residential real estate 296,937 184,864 Home equity lines of credit 40,653 20,575 Consumer, indirect 136 329 Consumer, direct 2,370 1,147 Consumer 2,506 1,476 Total acquired loans $ 572,748 $ 414,847 Total loans $ 2,728,778 $ 2,357,137
Purchased Credit Impaired Loans	The carrying amounts of these purchased credit impaired loans included in the loan balances above are summarized as follows at December 31: (Dollars in thousands) 2018 2017 Commercial real estate $ 11,955 $ 8,117 Commercial and industrial 1,287 767 Residential real estate 20,062 19,532 Consumer 58 33 Total outstanding balance $ 33,362 $ 28,449 Net carrying amount $ 22,475 $ 19,564
Accretable Yield Rollforward	Changes in the accretable yield for purchased credit impaired loans during the year ended December 31 were as follows: (Dollars in thousands) 2018 2017 Balance, beginning of period $ 6,704 $ 7,132 Reclassification from nonaccretable to accretable 2,019 1,285 Additions: ASB 2,047 — Accretion (1,815 ) (1,713 ) Balance, December 31 $ 8,955 $ 6,704 Acquired loans, excluding acquired overdrafts of $438,000 , are reported net of the unamortized fair value adjustment. The following table details the fair value adjustment for acquired loans as of the acquisition date: (Dollars in thousands, except per share data) Nonimpaired Loans Contractual cash flows $ 342,087 Nonaccretable difference 59,967 Expected cash flows 282,120 Accretable yield 54,029 Fair value $ 228,091 Credit Impaired Loans Contractual cash flows $ 16,054 Nonaccretable difference 5,908 Expected cash flows 10,146 Accretable yield 2,047 Fair value $ 8,099
Related Party Loans	Activity in related party loans is presented in the table below. Other changes primarily consist of changes in related party status, and the addition and exit of directors during the year, as applicable. (Dollars in thousands) Balance, December 31, 2017 $ 15,102 New loans and disbursements 5,508 Repayments (3,720 ) Other changes (101 ) Balance, December 31, 2018 $ 16,789
Nonaccrual and Past Due Loans	The recorded investments in loans on nonaccrual status and loans delinquent for 90 days or more and accruing were as follows at December 31: Accruing Loans 90+ Days Past Due Nonaccrual Loans (Dollars in thousands) 2018 2017 2018 2017 Originated loans: Commercial real estate, construction $ 710 $ 754 $ — $ — Commercial real estate, other 6,565 6,877 786 — Commercial real estate 7,275 7,631 786 — Commercial and industrial 1,673 739 — — Residential real estate 4,105 3,546 398 548 Home equity lines of credit 596 550 7 50 Consumer, indirect 480 256 — — Consumer, direct 56 39 — 16 Consumer 536 295 — 16 Total originated loans $ 14,185 $ 12,761 $ 1,191 $ 614 Acquired loans: Commercial real estate, other $ 319 $ 192 $ 15 $ 215 Commercial and industrial 36 259 18 45 Residential real estate 1,921 2,168 1,032 730 Home equity lines of credit 637 312 — 22 Total acquired loans $ 2,913 $ 2,931 $ 1,065 $ 1,012 Total loans $ 17,098 $ 15,692 $ 2,256 $ 1,626
Aging Of The Recorded Investment In Past Due Loans And Leases	The following tables present the aging of the recorded investment in past due loans at December 31: Loans Past Due Current Total (Dollars in thousands) 30 - 59 days 60 - 89 days 90 + Days Total 2018 Originated loans: Commercial real estate, construction $ — $ — $ 710 $ 710 $ 123,303 $ 124,013 Commercial real estate, other 12 736 7,151 7,899 624,301 632,200 Commercial real estate 12 736 7,861 8,609 747,604 756,213 Commercial and industrial 1,678 3,520 1,297 6,495 523,712 530,207 Residential real estate 4,457 1,319 2,595 8,371 288,489 296,860 Home equity lines of credit 531 30 431 992 92,334 93,326 Consumer, indirect 3,266 488 165 3,919 403,248 407,167 Consumer, direct 308 50 42 400 71,274 71,674 Consumer 3,574 538 207 4,319 474,522 478,841 Deposit account overdrafts — — — — 583 583 Total originated loans $ 10,252 $ 6,143 $ 12,391 $ 28,786 $ 2,127,244 $ 2,156,030 Loans Past Due Current Total (Dollars in thousands) 30 - 59 days 60 - 89 days 90 + Days Total 2018 Acquired loans: Commercial real estate, construction $ 511 $ — $ — $ 511 $ 11,893 $ 12,404 Commercial real estate, other 523 457 233 1,213 183,498 184,711 Commercial real estate 1,034 457 233 1,724 195,391 197,115 Commercial and industrial 111 13 18 142 35,395 35,537 Residential real estate 6,124 1,823 1,885 9,832 287,105 296,937 Home equity lines of credit 238 233 534 1,005 39,648 40,653 Consumer, indirect — — — — 136 136 Consumer, direct 23 6 — 29 2,341 2,370 Consumer 23 6 — 29 2,477 2,506 Total acquired loans $ 7,530 $ 2,532 $ 2,670 $ 12,732 $ 560,016 $ 572,748 Total loans $ 17,782 $ 8,675 $ 15,061 $ 41,518 $ 2,687,260 $ 2,728,778 2017 Originated loans: Commercial real estate, construction $ — $ — $ — $ — $ 107,118 $ 107,118 Commercial real estate, other 990 — 6,492 7,482 587,965 595,447 Commercial real estate 990 — 6,492 7,482 695,083 702,565 Commercial and industrial 1,423 92 706 2,221 435,830 438,051 Residential real estate 4,562 1,234 2,408 8,204 296,319 304,523 Home equity lines of credit 502 80 395 977 87,925 88,902 Consumer, indirect 2,153 648 105 2,906 337,484 340,390 Consumer, direct 417 46 48 511 66,499 67,010 Consumer 2,570 694 153 3,417 403,983 407,400 Deposit account overdrafts — — — — 849 849 Total originated loans $ 10,047 $ 2,100 $ 10,154 $ 22,301 $ 1,919,989 $ 1,942,290 Acquired loans: Commercial real estate, construction $ — $ — $ — $ — $ 8,319 $ 8,319 Commercial real estate, other 775 948 312 2,035 163,085 165,120 Commercial real estate 775 948 312 2,035 171,404 173,439 Commercial and industrial — 1 171 172 34,321 34,493 Residential real estate 4,656 1,391 1,910 7,957 176,907 184,864 Home equity lines of credit 126 — 301 427 20,148 20,575 Consumer, indirect 3 — — 3 326 329 Consumer, direct 10 11 — 21 1,126 1,147 Consumer 13 11 — 24 1,452 1,476 Total acquired loans $ 5,570 $ 2,351 $ 2,694 $ 10,615 $ 404,232 $ 414,847 Total loans $ 15,617 $ 4,451 $ 12,848 $ 32,916 $ 2,324,221 $ 2,357,137
Loans By Risk Category	The following tables summarize the risk category of Peoples' loan portfolio based upon the most recent analysis performed at December 31: Pass Rated Special Mention Substandard Doubtful Not Rated Total (Dollars in thousands) (Grades 1 - 4) (Grade 5) (Grade 6) (Grade 7) 2018 Originated loans: Commercial real estate, construction $ 121,457 $ — $ 1,472 $ — $ 1,084 $ 124,013 Commercial real estate, other 612,099 10,898 9,203 — — 632,200 Commercial real estate 733,556 10,898 10,675 — 1,084 756,213 Commercial and industrial 476,290 45,990 7,692 — 235 530,207 Residential real estate 14,229 500 11,971 409 269,751 296,860 Home equity lines of credit 453 — — — 92,873 93,326 Consumer, indirect 8 — — — 407,159 407,167 Consumer, direct 30 — — — 71,644 71,674 Consumer 38 — — — 478,803 478,841 Deposit account overdrafts — — — — 583 583 Total originated loans $ 1,224,566 $ 57,388 $ 30,338 $ 409 $ 843,329 $ 2,156,030 Pass Rated Special Mention Substandard Doubtful Not Rated Total (Dollars in thousands) (Grades 1 - 4) (Grade 5) (Grade 6) (Grade 7) 2018 Acquired loans: Commercial real estate, construction $ 8,976 $ 1,795 $ 1,633 $ — $ — $ 12,404 Commercial real estate, other 169,260 7,241 8,114 96 — 184,711 Commercial real estate 178,236 9,036 9,747 96 — 197,115 Commercial and industrial 32,471 2,008 1,058 — — 35,537 Residential real estate 17,370 1,938 2,033 137 275,459 296,937 Home equity lines of credit 33 — — — 40,620 40,653 Consumer, indirect 4 — — — 132 136 Consumer, direct 31 — — — 2,339 2,370 Consumer 35 — — — 2,471 2,506 Total acquired loans $ 228,145 $ 12,982 $ 12,838 $ 233 $ 318,550 $ 572,748 Total loans $ 1,452,711 $ 70,370 $ 43,176 $ 642 $ 1,161,879 $ 2,728,778 2017 Originated loans: Commercial real estate, construction $ 100,409 $ 5,502 $ 754 $ — $ 453 $ 107,118 Commercial real estate, other 561,320 17,189 16,938 — — 595,447 Commercial real estate 661,729 22,691 17,692 — 453 702,565 Commercial and industrial 420,477 13,062 4,512 — — 438,051 Residential real estate 17,896 1,000 11,371 216 274,040 304,523 Home equity lines of credit 454 — — — 88,448 88,902 Consumer, indirect 55 8 — — 340,327 340,390 Consumer, direct 33 — — — 66,977 67,010 Consumer 88 8 — — 407,304 407,400 Deposit account overdrafts — — — — 849 849 Total originated loans $ 1,100,644 $ 36,761 $ 33,575 $ 216 $ 771,094 $ 1,942,290 Acquired loans: Commercial real estate, construction $ 8,267 $ — $ 52 $ — $ — $ 8,319 Commercial real estate, other 149,486 6,527 9,107 — — 165,120 Commercial real estate 157,753 6,527 9,159 — — 173,439 Commercial and industrial 32,011 157 2,325 — — 34,493 Residential real estate 12,543 593 1,105 — 170,623 184,864 Home equity lines of credit 124 — — — 20,451 20,575 Consumer, indirect 12 — — — 317 329 Consumer, direct 35 — — — 1,112 1,147 Consumer 47 — — — 1,429 1,476 Total acquired loans $ 202,478 $ 7,277 $ 12,589 $ — $ 192,503 $ 414,847 Total loans $ 1,303,122 $ 44,038 $ 46,164 $ 216 $ 963,597 $ 2,357,137
Schedule Of Impaired Loans	The following table summarizes loans classified as impaired at December 31: Unpaid Principal Balance Recorded Investment Total Recorded Investment Average Recorded Investment Interest Income Recognized With Without Related Allowance (Dollars in thousands) Allowance Allowance 2018 Commercial real estate, construction $ 2,376 $ — $ 2,376 $ 2,376 $ — $ 1,732 $ 74 Commercial real estate, other 15,464 274 14,946 15,220 119 14,043 455 Commercial real estate 17,840 274 17,322 17,596 119 15,775 529 Commercial and industrial 3,305 790 2,436 3,226 157 2,423 72 Residential real estate 25,990 644 24,034 24,678 154 22,769 1,134 Home equity lines of credit 2,291 424 1,869 2,293 73 1,832 109 Consumer, indirect 496 — 503 503 — 278 15 Consumer, direct 79 22 57 79 6 63 20 Consumer 575 22 560 582 6 341 35 Total $ 50,001 $ 2,154 $ 46,221 $ 48,375 $ 509 $ 43,140 $ 1,879 2017 Commercial real estate, construction $ 821 $ — $ 754 754 $ — $ 788 $ — Commercial real estate, other 14,909 14 13,606 13,620 1 14,392 503 Commercial real estate 15,730 14 14,360 14,374 1 15,180 503 Commercial and industrial 1,690 951 572 1,523 199 1,668 65 Residential real estate 24,743 477 22,626 23,103 58 23,195 1,246 Home equity lines of credit 1,707 81 1,624 1,705 18 1,505 85 Consumer, indirect 273 70 206 276 26 184 20 Consumer, direct 87 56 28 84 37 79 7 Consumer 360 126 234 360 63 263 27 Total $ 44,230 $ 1,649 $ 39,416 $ 41,065 $ 339 $ 41,811 $ 1,926
Troubled Debt Restructurings on Financing Receivables	The following table summarizes the loans that were modified as TDRs during the years ended December 31, 2018 and 2017 . Recorded Investment (1) (Dollars in thousands) Number of Contracts Pre-Modification Post-Modification Remaining Recorded Investment 2018 Originated loans: Commercial and industrial 1 $ 714 $ 714 $ 714 Residential real estate 9 904 904 899 Home equity lines of credit 8 666 666 660 Consumer, indirect 27 485 485 412 Consumer, direct 5 32 32 29 Consumer 32 517 517 441 Total 50 $ 2,801 $ 2,801 $ 2,714 Acquired loans: Commercial real estate, construction 1 $ 50 $ 50 $ 45 Residential real estate 15 1,258 1,258 1,226 Home equity lines of credit 6 196 196 193 Total 22 $ 1,504 $ 1,504 $ 1,464 2017 Originated loans: Commercial real estate, other 1 $ 14 $ 14 $ 14 Commercial and industrial 4 210 210 149 Residential real estate 7 483 483 473 Home equity lines of credit 6 296 296 289 Consumer, indirect 15 218 218 201 Consumer, direct 2 10 10 8 Consumer 17 228 228 209 Total 35 $ 1,231 $ 1,231 $ 1,134 Acquired loans: Commercial real estate, construction 3 $ 288 $ 288 $ 280 Residential real estate 9 442 442 412 Home equity lines of credit 5 328 328 320 Consumer, direct 1 2 2 — Total 18 $ 1,060 $ 1,060 $ 1,012 (1) The amounts shown are inclusive of all partial paydowns and charge-offs. Loans modified in a TDR that were fully paid down, charged-off or foreclosed upon by period end are not reported.
Summary Of Activity In Allowance For Loan And Lease Losses	Changes in the allowance for loan losses in the periods ended December 31 were as follows: (Dollars in thousands) Commercial Real Estate Commercial and Industrial Residential Real Estate Home Equity Lines of Credit Consumer, indirect Consumer, direct Deposit Account Overdrafts Total Balance, January 1, 2018 $ 7,797 $ 5,813 $ 904 $ 693 $ 2,944 $ 464 $ 70 $ 18,685 Charge-offs (849 ) (38 ) (355 ) (107 ) (2,515 ) (358 ) (965 ) (5,187 ) Recoveries 60 18 232 14 474 140 205 1,143 Net charge-offs (789 ) (20 ) (123 ) (93 ) (2,041 ) (218 ) (760 ) (4,044 ) Provision for loan losses 995 385 433 18 2,311 105 771 5,018 Balance, December 31, 2018 $ 8,003 $ 6,178 $ 1,214 $ 618 $ 3,214 $ 351 $ 81 $ 19,659 Period-end amount allocated to: Loans individually evaluated for impairment $ 119 $ 157 $ 154 $ 73 $ — $ 6 $ — $ 509 Loans collectively evaluated for impairment 7,884 6,021 1,060 545 3,214 345 81 19,150 Balance, December 31, 2018 $ 8,003 $ 6,178 $ 1,214 $ 618 $ 3,214 $ 351 $ 81 $ 19,659 Balance, January 1, 2017 $ 7,172 $ 6,353 $ 982 $ 688 $ 2,312 $ 518 $ 171 $ 18,196 Charge-offs (408 ) (175 ) (637 ) (131 ) (2,110 ) (372 ) (1,038 ) (4,871 ) Recoveries 146 1 152 13 764 179 215 1,470 Net charge-offs (262 ) (174 ) (485 ) (118 ) (1,346 ) (193 ) (823 ) (3,401 ) Provision for (recovery of) loan losses 887 (366 ) 407 123 1,978 139 722 3,890 Balance, December 31, 2017 $ 7,797 $ 5,813 $ 904 $ 693 $ 2,944 $ 464 $ 70 $ 18,685 Period-end amount allocated to: Loans individually evaluated for impairment $ 1 $ 199 $ 58 $ 18 $ 26 $ 37 $ — $ 339 Loans collectively evaluated for impairment 7,796 5,614 846 675 2,918 427 70 18,346 Balance, December 31, 2017 $ 7,797 $ 5,813 $ 904 $ 693 $ 2,944 $ 464 $ 70 $ 18,685
Allowance for Loan Losses Acquired Loans [Table Text Block]	The following table presents activity in the allowance for loan losses for acquired loans as of December 31: (Dollars in thousands) 2018 2017 Nonimpaired loans: Balance, January 1 $ — $ — Provision for loan losses 383 — Balance, December 31 $ 383 $ — Purchased credit impaired loans: Balance, January 1 $ 108 $ 233 Charge-offs (2 ) (7 ) Provision for (recovery of) loan losses 47 (118 ) Balance, December 31 $ 153 $ 108

Bank Premises and Equipment (Ta

Bank Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	The major categories of bank premises and equipment, net of accumulated depreciation, at December 31 are summarized as follows: (Dollars in thousands) 2018 2017 Land $ 13,776 $ 12,871 Building and premises 68,245 61,729 Furniture, fixtures and equipment 28,523 27,137 Total bank premises and equipment 110,544 101,737 Accumulated depreciation (54,002 ) (49,227 ) Net book value $ 56,542 $ 52,510
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	The future minimum payments under noncancellable operating leases with initial or remaining terms of one year or more consisted of the following at December 31, 2018 : (Dollars in thousands) Payments 2019 $ 975 2020 756 2021 606 2022 455 2023 295 Thereafter 223 Total future operating lease payments $ 3,310

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Other Intangible Assets [Abstract]
Schedule of Goodwill [Table Text Block]	The following table details changes in the recorded amount of goodwill for the years ended December 31 : (Dollars in thousands) 2018 2017 Goodwill, beginning of year $ 133,111 $ 132,631 Goodwill recorded from acquisitions 18,134 480 Goodwill, end of year $ 151,245 $ 133,111
Schedule of Other Intangible Assets	Other intangible assets were comprised of the following at December 31: (Dollars in thousands) Core Deposits Customer Relationships Total 2018 Gross intangibles $ 15,636 $ 7,480 $ 23,116 Intangibles recorded from acquisitions 2,363 — 2,363 Accumulated amortization (12,540 ) (4,754 ) (17,294 ) Total acquisition-related intangibles $ 5,459 $ 2,726 $ 8,185 Servicing rights 2,655 Total other intangibles $ 10,840 2017 Gross intangibles $ 16,150 $ 5,373 $ 21,523 Intangibles recorded from acquisitions — 1,593 1,593 Accumulated amortization (10,281 ) (3,675 ) (13,956 ) Total acquisition-related intangibles $ 5,869 $ 3,291 $ 9,160 Servicing rights 2,305 Total other intangibles $ 11,465
Schedule of Future Amortization of Other Intangible Assets	The following table details estimated aggregate future amortization of other intangible assets at December 31, 2018 : (Dollars in thousands) Core Deposits Customer Relationships Total 2019 $ 1,999 $ 779 $ 2,778 2020 1,438 629 2,067 2021 911 470 1,381 2022 437 318 755 2023 236 217 453 Thereafter 438 313 751 Total $ 5,459 $ 2,726 $ 8,185
Servicing Rights Activity	The following is an analysis of activity of servicing rights for the years ended December 31: (Dollars in thousands) 2018 2017 2016 Balance, beginning of year $ 2,305 $ 2,305 $ 2,387 Amortization (1,623 ) (741 ) (762 ) Servicing rights originated 1,697 741 680 Servicing rights acquired 276 — — Balance, end of year $ 2,655 $ 2,305 $ 2,305

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Deposit Balances	Peoples’ deposit balances were comprised of the following at December 31: (Dollars in thousands) 2018 2017 Retail CDs: $100,000 or more $ 182,717 $ 149,105 Less than $100,000 211,618 189,568 Retail CDs 394,335 338,673 Interest-bearing deposit accounts 573,702 593,415 Savings accounts 468,500 446,714 Money market deposit accounts 379,878 371,376 Governmental deposit accounts 267,319 264,524 Brokered CDs 263,854 159,618 Total interest-bearing deposits 2,347,588 2,174,320 Non-interest-bearing deposits 607,877 556,010 Total deposits $ 2,955,465 $ 2,730,330
Schedule of Maturities of Certificates of Deposit	The contractual maturities of CDs for each of the next five years and thereafter are as follows: (Dollars in thousands) Retail Brokered Total 2019 $ 196,849 $ 235,421 $ 432,270 2020 84,416 18,330 102,746 2021 69,399 5,540 74,939 2022 19,268 4,081 23,349 2023 23,212 482 23,694 Thereafter 1,191 — 1,191 Total CDs $ 394,335 $ 263,854 $ 658,189

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2018
Short-term Debt [Abstract]
Schedule of Short-term Borrowings	Peoples utilizes various short-term borrowings as sources of funds, which are summarized as follows at December 31: (Dollars in thousands) Retail Repurchase Agreements FHLB Advances National Market Repurchase Agreements Other (a) 2018 Ending balance $ 51,202 $ 305,000 $ — $ (4 ) Average balance 64,519 219,897 14,329 301 Highest month-end balance 72,822 307,561 30,000 1,553 Interest expense $ 194 $ 4,494 $ 527 $ 23 Weighted-average interest rate: End of year 0.48 % 2.32 % — % — % During the year 0.30 % 2.04 % 3.68 % NM 2017 Ending balance $ 76,899 $ 92,592 $ 40,000 $ — Average balance 75,344 100,205 6,685 13 Highest month-end balance 80,649 208,000 40,000 — Interest expense $ 128 $ 1,160 $ 246 $ — Weighted-average interest rate: End of year 0.17 % 1.91 % 3.68 % — % During the year 0.17 % 1.16 % 3.68 % 1.30 % 2016 Ending balance $ 74,607 $ 231,000 $ — $ — Average balance 72,886 86,260 — 23 Highest month-end balance 81,353 231,000 — — Interest expense $ 124 $ 384 $ — $ — Weighted-average interest rate: End of year 0.17 % 0.64 % — % — % During the year 0.17 % 0.45 % — % 1.11 %

Long-Term Borrowings (Tables)

Long-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Long-Term Borrowings	Long-term borrowings consisted of the following at December 31 : 2018 2017 (Dollars in thousands) Balance Weighted- Average Rate Balance Weighted- Average Rate FHLB putable, non-amortizing, fixed rate advances $ 85,000 2.05 % $ 115,000 1.86 % FHLB amortizing, fixed rate advances 17,361 2.09 % 21,939 2.02 % Junior subordinated debt securities 7,283 7.83 % 7,107 4.97 % Unamortized debt issuance cost — — % (27 ) — % Long-term borrowings $ 109,644 2.44 % $ 144,019 2.04 %
Schedule of Aggregate Minimum Annual Retirements of Long-Term Borrowings	At December 31, 2018 , the aggregate minimum annual retirements of long-term borrowings in future periods were as follows: (Dollars in thousands) Balance Weighted-Average Rate 2019 $ 3,512 1.53 % 2020 25,564 1.83 % 2021 21,979 1.73 % 2022 16,521 1.95 % 2023 1,157 1.01 % Thereafter 40,911 3.51 % Long-term borrowings $ 109,644 2.44 %

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2018
Stockholders' Equity Attributable to Parent [Abstract]
Dividends Declared [Table Text Block]	The following table details the cash dividends declared per common share for the year ended December 31: 2018 2017 First Quarter $ 0.26 $ 0.20 Second Quarter 0.28 0.20 Third Quarter 0.28 0.22 Fourth Quarter 0.30 0.22 Total dividends declared $ 1.12 $ 0.84
Schedule of Preferred, Common and Treasury Stock	The following table details the activity in Peoples’ common stock and treasury stock during the years ended December 31 : Common Stock Treasury Stock Shares at December 31, 2015 18,931,200 586,686 Changes related to stock-based compensation awards: Grant of restricted common shares — (56,000 ) Release of restricted common shares — 17,220 Cancellation of restricted common shares (11,820 ) 1,000 Exercise of stock options for common shares — (1,775 ) Grant of common shares — (350 ) Changes related to deferred compensation plan for Boards of Directors: Purchase of treasury stock — 8,396 Reissuance of treasury stock — (12,012 ) Common shares purchased under repurchase program — 279,770 Common shares issued under dividend reinvestment plan 19,711 — Common shares issued under compensation plan for Boards of Directors — (11,450 ) Common shares issued under employee stock purchase plan — (15,727 ) Shares at December 31, 2016 18,939,091 795,758 Changes related to stock-based compensation awards: Grant of restricted common shares — (68,707 ) Release of restricted common shares — 10,452 Cancellation of restricted common shares (3,554 ) 5,050 Grant of common shares — (300 ) Exercise of stock options for common shares — (266 ) Changes related to deferred compensation plan for Boards of Directors: Purchase of treasury stock — 5,413 Reissuance of treasury stock — (24,634 ) Common shares issued under dividend reinvestment plan 16,848 — Common shares issued under compensation plan for Board of Directors — (9,092 ) Common shares issued under employee stock purchase plan — (11,225 ) Shares at December 31, 2017 18,952,385 702,449 Changes related to stock-based compensation awards: Release of restricted common shares — 32,082 Cancellation of restricted common shares — 2,011 Exercise of stock options for common shares — (102 ) Grant of restricted common shares — (106,805 ) Grant of common shares — (16,544 ) Changes related to deferred compensation plan for Board of Directors: Purchase of treasury stock — 6,526 Sale of treasury stock — (10 ) Reissuance of treasury stock — (2,089 ) Common shares issued under dividend reinvestment plan 19,282 — Common shares issued under compensation plan for Board of Directors — (4,699 ) Common shares issued under employee stock purchase plan — (11,530 ) Issuance of common shares related to acquisition of ASB 1,152,711 — Shares at December 31, 2018 20,124,378 601,289
Schedule of Accumulated Other Comprehensive (Loss) Income	The following details the change in the components of Peoples’ accumulated other comprehensive (loss) income for the years ended December 31 : (Dollars in thousands) Unrealized Gain (Loss) on Securities Unrecognized Net Pension and Postretirement Costs Unrealized Gain (Loss) on Cash Flow Hedge Accumulated Other Comprehensive (Loss) Income Balance, December 31, 2015 $ 2,869 $ (3,228 ) $ — $ (359 ) Reclassification adjustments to net income: Realized gain on sale of securities, net of tax (604 ) — — (604 ) Other comprehensive (loss) income, net of reclassifications and tax (1,684 ) (93 ) 1,186 (591 ) Balance, December 31, 2016 $ 581 $ (3,321 ) $ 1,186 $ (1,554 ) Reclassification adjustments to net income: Realized gain on sale of securities, net of tax (1,939 ) — — (1,939 ) Realized loss due to settlement and curtailment, net of tax — 157 — 157 Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2018-02 (370 ) (754 ) 200 (924 ) Other comprehensive loss, net of reclassifications and tax (360 ) (338 ) (257 ) (955 ) Balance, December 31, 2017 $ (2,088 ) $ (4,256 ) $ 1,129 $ (5,215 ) Reclassification adjustments to net income: Realized gain on sale of securities, net of tax 115 — — 115 Realized loss due to settlement and curtailment, net of tax — 211 — 211 Amounts reclassified out of accumulated other comprehensive loss per ASU 2016-01 (5,020 ) — — (5,020 ) Other comprehensive (loss) income, net of reclassifications and tax (3,089 ) 334 (269 ) (3,024 ) Balance, December 31, 2018 $ (10,082 ) $ (3,711 ) $ 860 $ (12,933 )

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Schedule of Changes in Projected Benefit Obligations and Fair Value of Assets	The following tables provide a reconciliation of the changes in the benefit obligations and fair value of assets of the plans for the years ended December 31, 2018 and 2017 , and a statement of the funded status as of December 31, 2018 and 2017 : Pension Benefits Post-retirement Benefits (Dollars in thousands) 2018 2017 2018 2017 Change in benefit obligation: Obligation at January 1 $ 12,991 $ 12,127 $ 91 $ 103 Interest cost 423 451 3 3 Plan participants’ contributions — — 46 46 Actuarial (gain) loss (1,519 ) 1,207 — (4 ) Benefit payments (197 ) (189 ) (57 ) (57 ) Settlements (703 ) (605 ) — — Obligation at December 31 $ 10,995 $ 12,991 $ 83 $ 91 Accumulated benefit obligation at December 31 $ 10,995 $ 12,991 $ 83 $ 91 Change in plan assets: Fair value of plan assets at January 1 $ 8,493 $ 7,582 $ — $ — Actual (loss) return on plan assets (554 ) 1,140 — — Employer contributions 3,195 565 11 11 Plan participants’ contributions — — 46 46 Benefit payments (197 ) (189 ) (57 ) (57 ) Settlements (703 ) (605 ) — — Fair value of plan assets at December 31 $ 10,234 $ 8,493 $ — $ — Funded status at December 31 $ (761 ) $ (4,498 ) $ (83 ) $ (91 ) Amounts recognized in Consolidated Balance Sheets: Accrued benefit liability $ (761 ) $ (4,498 ) $ (83 ) $ (91 ) Net amount recognized $ (761 ) $ (4,498 ) $ (83 ) $ (91 ) Amounts recognized in Accumulated Other Comprehensive Loss: Unrecognized prior service cost $ — $ — $ (1 ) $ (1 ) Unrecognized net loss (gain) 3,761 4,311 (52 ) (56 ) Total $ 3,761 $ 4,311 $ (53 ) $ (57 ) Weighted-average assumptions at year-end: Discount rate 3.55 % 3.40 % 3.40 % 3.40 %
Schedule of Net Periodic Benefit Costs	The following table details the components of the net periodic cost (benefit) for the plans at December 31: Pension Benefits Post-retirement Benefits (Dollars in thousands) 2018 2017 2016 2018 2017 2016 Interest cost $ 423 $ 451 $ 438 $ 3 $ 3 $ 4 Expected return on plan assets (640 ) (553 ) (492 ) — — — Amortization of net loss (gain) 104 102 95 (5 ) (6 ) (6 ) Settlement of benefit obligation 267 242 — — — — Net periodic cost (benefit) $ 154 $ 242 $ 41 $ (2 ) $ (3 ) $ (2 ) Weighted-average assumptions: Discount rate 3.55 % 3.80 % 3.90 % 3.40 % 3.80 % 3.90 % Expected return on plan assets 7.50 % 7.50 % 7.50 % n/a n/a n/a Rate of compensation increase n/a n/a n/a n/a n/a n/a
Schedule of Allocation of Plan Assets	The following table provides the fair values of investments held in Peoples' pension plan at December 31, by major asset category: (Dollars in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) 2018 Equity securities: Mutual funds - equity $ 6,750 $ 6,750 $ — Debt securities: Mutual funds - taxable income 2,746 2,746 — Total fair value of pension assets $ 9,496 $ 9,496 $ — 2017 Equity securities: Mutual funds - equity $ 6,131 $ 6,131 $ — Debt securities: Mutual funds - taxable income 2,248 2,248 — Total fair value of pension assets $ 8,379 $ 8,379 $ —
Schedule of Estimated Future Benefit Payments	Estimated future benefit payments, which reflect benefits attributable to estimated future service, for the years ending December 31 are as follows: (Dollars in thousands) Pension Benefits Post-retirement Benefits 2019 $ 1,000 $ 11 2020 1,095 10 2021 1,283 10 2022 740 9 2023 774 9 2024 to 2028 3,091 34 Total $ 7,983 $ 83

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Summary of Income Tax Contingencies [Table Text Block]	The following table provides a reconciliation of uncertain tax positions at December 31: (Dollars in thousands) 2018 2017 Uncertain tax positions, beginning of year $ 550 $ 522 Gross increase based on tax positions related to current year 55 42 Gross increase for tax position taken during prior years 13 20 Gross decrease due to the statute of limitations (195 ) (34 ) Uncertain tax positions, end of year $ 423 $ 550
Schedule of Effective Income Tax Rate Reconciliation	The reported income tax expense and effective tax rate in the Consolidated Statements of Income differ from the amounts computed by applying the statutory federal corporate income tax rate as follows for the years ended December 31 : (Dollars in thousands) 2018 2017 2016 Amount Rate Amount Rate Amount Rate Income tax computed at statutory federal corporate income tax rate $ 11,505 21.0 % $ 20,045 35.0 % $ 15,785 35.0 % Differences in rate resulting from: Release of valuation allowance (805 ) (1.5 )% — — % — — % Tax Cuts and Job Act (705 ) (1.3 )% 897 1.6 % — — % Tax-exempt interest income (554 ) (1.0 )% (1,092 ) (1.9 )% (1,170 ) (2.6 )% Bank owned life insurance (393 ) (0.7 )% (683 ) (1.2 )% (495 ) (1.1 )% Stock awards (332 ) (0.6 )% (154 ) (0.3 )% — — % Investments in tax credit funds (125 ) (0.2 )% (221 ) (0.4 )% (164 ) (0.4 )% Other, net 95 0.2 % (60 ) (0.1 )% 169 0.4 % Income tax expense $ 8,686 15.9 % $ 18,732 32.7 % $ 14,125 31.3 %
Schedule of Components of Income Tax Expense (Benefit)	Peoples' reported income tax expense consisted of the following for the years ended December 31 : (Dollars in thousands) 2018 2017 2016 Current income tax expense $ 8,995 $ 21,511 $ 16,587 Deferred income tax benefit (309 ) (2,779 ) (2,462 ) Income tax expense $ 8,686 $ 18,732 $ 14,125
Schedule of Deferred Tax Assets and Liabilities	The significant components of Peoples' deferred tax assets and liabilities consisted of the following at December 31 : (Dollars in thousands) 2018 2017 Deferred tax assets: Allowance for loan losses $ 8,559 $ 6,992 Available-for-sale securities 2,678 555 Accrued employee benefits 1,843 2,569 Tax credit investments 805 1,560 Other 73 116 Gross deferred tax assets $ 13,958 $ 11,792 Valuation allowance $ — $ 805 Total deferred tax assets $ 13,958 $ 10,987 Deferred tax liabilities: Purchase accounting adjustments $ 5,839 $ 6,092 Deferred loan income 3,061 2,459 Bank premises and equipment (a) 2,047 307 Derivative instruments 228 300 Tax credit investments 82 — Other 673 484 Total deferred tax liabilities $ 11,930 $ 9,642 Net deferred tax asset $ 2,028 $ 1,345

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Calculations of Basic and Diluted Earnings per Common Share	The calculations of basic and diluted earnings per common share for the years ended December 31 were as follows: (Dollars in thousands, except per common share data) 2018 2017 2016 Distributed earnings allocated to common shareholders $ 21,334 $ 15,159 $ 11,532 Undistributed earnings allocated to common shareholders 24,660 23,115 19,483 Net earnings allocated to common shareholders $ 45,994 $ 38,274 $ 31,015 Weighted-average common shares outstanding 18,991,768 18,050,189 18,013,693 Effect of potentially dilutive common shares 130,492 158,495 141,770 Total weighted-average diluted common shares outstanding 19,122,260 18,208,684 18,155,463 Earnings per common share: Basic $ 2.42 $ 2.12 $ 1.72 Diluted $ 2.41 $ 2.10 $ 1.71 Anti-dilutive common shares excluded from calculation: Restricted shares, stock options and stock appreciation rights 1,748 453 20,769

Financial Instruments with Of_2

Financial Instruments with Off-Balance Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2018
Financial Instruments with Off-Balance Sheet Risk [Abstract]
Loan Commitments and Standby Letters of Credit [Table Text Block]	The total amounts of loan commitments and standby letters of credit at December 31 are summarized as follows: (Dollars in thousands) 2018 2017 Home equity lines of credit $ 101,265 $ 83,949 Unadvanced construction loans 74,734 112,475 Other loan commitments 314,271 260,552 Loan commitments 490,270 456,976 Standby letters of credit $ 10,214 $ 20,873

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2018
Regulatory Matters [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	Peoples' and Peoples Bank's actual capital amounts and ratios as of December 31 are also presented in the following table: 2018 2017 (Dollars in thousands) Amount Ratio Amount Ratio PEOPLES Common Equity Tier 1 (a) Actual $ 378,855 13.6 % $ 327,172 13.3 % For capital adequacy 125,235 4.5 % 110,998 4.5 % To be well capitalized 180,895 6.5 % 160,330 6.5 % Tier 1 (b) Actual $ 386,138 13.9 % $ 334,279 13.6 % For capital adequacy 166,980 6.0 % 147,997 6.0 % To be well capitalized 222,640 8.0 % 197,330 8.0 % Total Capital (c) Actual $ 406,333 14.6 % $ 355,977 14.4 % For capital adequacy 222,640 8.0 % 197,330 8.0 % To be well capitalized 278,300 10.0 % 246,662 10.0 % Tier 1 Leverage (d) Actual $ 386,138 10.0 % $ 334,279 9.8 % For capital adequacy 154,615 4.0 % 137,119 4.0 % To be well capitalized 193,269 5.0 % 171,399 5.0 % Capital Conservation Buffer $ 183,693 6.6 % $ 158,647 6.4 % Fully phased in minimum 69,575 2.5 % 61,666 2.5 % Net Risk-Weighted Assets $ 2,782,995 $ 2,466,620 PEOPLES BANK Common Equity Tier 1 (a) Actual $ 365,063 13.2 % $ 305,216 12.4 % For capital adequacy 124,870 4.5 % 110,654 4.5 % To be well capitalized 180,367 6.5 % 159,833 6.5 % Tier 1 (b) Actual $ 365,063 13.2 % $ 305,216 12.4 % For capital adequacy 166,493 6.0 % 147,539 6.0 % To be well capitalized 221,990 8.0 % 196,718 8.0 % Total Capital (c) Actual $ 385,258 13.9 % $ 324,026 13.2 % For capital adequacy 221,990 8.0 % 196,718 8.0 % To be well capitalized 277,488 10.0 % 245,898 10.0 % Tier 1 Leverage (d) Actual $ 365,063 9.5 % $ 305,216 8.9 % For capital adequacy 154,357 4.0 % 136,939 4.0 % To be well capitalized 192,947 5.0 % 171,174 5.0 % Capital Conservation Buffer $ 163,268 5.9 % $ 127,308 5.2 % Fully phased in minimum 69,372 2.5 % 61,474 2.5 % Net Risk-Weighted Assets $ 2,774,879 $ 2,458,975 (a) Ratio represents common equity tier 1 capital to net risk-weighted assets (b) Ratio represents tier 1 capital to net risk-weighted assets (c) Ratio represents total capital to net risk-weighted assets (d) Ratio represents tier 1 capital to average assets

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Share-based Compensation [Abstract]
Schedule of Stock Options Outstanding & Exercisable by Exercise Price Range	Number of Common Shares Subject to SARs Weighted- Average Exercise Price Weighted- Average Remaining Contractual Life Aggregate Intrinsic Value Outstanding at January 1 314 $ 23.77 Exercised 314 23.77 Forfeited — — Outstanding at December 31 — $ — — $ — Exercisable at December 31 — $ — — $ —
Schedule of Stock Appreciation Rights Outstanding & Exercisable by Exercise Price	The following summarizes the changes to Peoples' outstanding SARs for the year ended December 31, 2018 : Number of Common Shares Subject to SARs Weighted- Average Exercise Price Weighted- Average Remaining Contractual Life Aggregate Intrinsic Value Outstanding at January 1 314 $ 23.77 Exercised 314 23.77 Forfeited — — Outstanding at December 31 — $ — — $ — Exercisable at December 31 — $ — — $ —
Schedule of Restricted Shares Activity	The following summarizes the changes to Peoples’ outstanding restricted common shares for the year ended December 31, 2018 : Time-Based Vesting Performance-Based Vesting Number of Common Shares Weighted-Average Grant Date Fair Value Number of Common Shares Weighted-Average Grant Date Fair Value Outstanding at January 1 33,082 $ 22.85 176,218 $ 25.50 Awarded 21,929 36.38 84,876 35.43 Released 11,332 22.84 83,311 23.62 Forfeited — — 2,011 34.34 Outstanding at December 31 43,679 $ 29.64 175,772 $ 31.08
Summary of Stock-Based Compensation and Related Tax Benefit	The following summarizes the amount of stock-based compensation and related tax benefit recognized for the years ended December 31: (Dollars in thousands) 2018 2017 2016 Stock-based compensation $ 2,575 $ 1,802 $ 1,392 Recognized tax benefit (541 ) (378 ) (487 ) Net expense recognized $ 2,034 $ 1,424 $ 905

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table Text Block]	Changes in the accretable yield for purchased credit impaired loans during the year ended December 31 were as follows: (Dollars in thousands) 2018 2017 Balance, beginning of period $ 6,704 $ 7,132 Reclassification from nonaccretable to accretable 2,019 1,285 Additions: ASB 2,047 — Accretion (1,815 ) (1,713 ) Balance, December 31 $ 8,955 $ 6,704 Acquired loans, excluding acquired overdrafts of $438,000 , are reported net of the unamortized fair value adjustment. The following table details the fair value adjustment for acquired loans as of the acquisition date: (Dollars in thousands, except per share data) Nonimpaired Loans Contractual cash flows $ 342,087 Nonaccretable difference 59,967 Expected cash flows 282,120 Accretable yield 54,029 Fair value $ 228,091 Credit Impaired Loans Contractual cash flows $ 16,054 Nonaccretable difference 5,908 Expected cash flows 10,146 Accretable yield 2,047 Fair value $ 8,099
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table provides the purchase price calculation as of the date of acquisition of ASB, and the assets acquired and liabilities assumed at their estimated fair values. (Dollars in thousands, except per share data) Purchase Price Common shares electing cash consideration 31,763 Cash purchase price per share $ 20.00 Cash consideration $ 635 Common shares electing stock consideration 1,947,271 Number of common shares of Peoples issued for each common share of acquired company 0.592 Price per Peoples' common share, as of April 13, 2018 $ 35.48 Common share consideration $ 40,898 Cash in lieu of fractional common shares of Peoples $ 2 Total consideration $ 41,535 Net Assets at Fair Value Assets Cash and due from banks $ 5,332 Available-for-sale investment securities 18,155 Held-to-maturity investment securities 649 Other investment securities 1,596 Total investment securities 20,400 Loans, net of deferred fees and costs 236,628 Loans held for sale 2,539 Bank premises and equipment, net of accumulated depreciation 3,485 Bank owned life insurance 4,803 Other intangible assets 2,639 Other assets 3,112 Total assets $ 278,938 Liabilities Deposits: Non-interest-bearing $ 29,487 Interest-bearing 169,142 Total deposits 198,629 Short-term borrowings 54,824 Accrued expenses and other liabilities 2,084 Total liabilities $ 255,537 Net assets $ 23,401 Goodwill $ 18,134

Parent Company Only Financial_2

Parent Company Only Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Parent Company Only Financial Information [Abstract]
Schedule of Condensed Balance Sheet	Condensed Balance Sheets December 31, (Dollars in thousands) 2018 2017 Assets: Cash and due from other banks $ 50 $ 50 Interest-bearing deposits in subsidiary bank 13,750 9,270 Due from subsidiary bank 584 9,486 Available-for-sale investment securities, at fair value (amortized cost of $615 at December 31, 2017) (a) — 6,933 Other investment securities (a) 216 — Investments in subsidiaries: Bank 506,200 431,482 Non-bank 8,298 1,812 Other assets 2,808 1,700 Total assets $ 531,906 $ 460,733 Liabilities: Accrued expenses and other liabilities $ 1,898 $ 1,471 Dividends payable 291 270 Mandatorily redeemable capital securities of subsidiary trust 9,577 400 Total liabilities 11,766 2,141 Total stockholders' equity 520,140 458,592 Total liabilities and stockholders' equity $ 531,906 $ 460,733
Schedule of Condensed Income Statement	Condensed Statements of Income Year Ended December 31, (Dollars in thousands) 2018 2017 2016 Income: Dividends from subsidiary bank $ 13,500 $ 27,000 $ 20,500 Dividends from non-bank subsidiary 2,500 20,000 1,250 Net gain on investment securities — 2,602 — Interest and other income 357 237 209 Total income 16,357 49,839 21,959 Expenses: Trust preferred securities expense 520 346 397 Intercompany management fees 1,561 1,361 1,131 Other expense 4,647 3,380 3,154 Total expenses 6,728 5,087 4,682 Income before federal income taxes and equity in (excess dividends from) undistributed earnings of subsidiaries 9,629 44,752 17,277 Applicable income tax expense (2,511 ) (1,309 ) (1,718 ) Equity in (excess dividends from) undistributed earnings of subsidiaries 34,115 (7,590 ) 12,162 Net income $ 46,255 $ 38,471 $ 31,157
Schedule of Condensed Cash Flow Statement	Statements of Cash Flows Year Ended December 31, (Dollars in thousands) 2018 2017 2016 Operating activities Net income $ 46,255 $ 38,471 $ 31,157 Adjustment to reconcile net income to cash provided by operations: Depreciation, amortization and accretion, net 9,177 (6,525 ) 190 (Equity in) excess dividends from undistributed earnings of subsidiaries (34,115 ) 7,590 (12,162 ) Gain on investment securities — (2,602 ) — Other, net 31 2,810 355 Net cash provided by operating activities 21,348 39,744 19,540 Investing activities Net proceeds from sales and maturities of investment securities 5,388 2,359 — Investment in subsidiaries (31,813 ) (50,883 ) (22,769 ) (Increase) decrease in receivable from subsidiary 32,236 25,496 23,389 Business combinations, net of cash received (637 ) — — Other, net 228 (229 ) — Net cash (used in) provided by investing activities 5,402 (23,257 ) 620 Financing activities Purchase of treasury stock (1,380 ) (508 ) (5,480 ) Proceeds from issuance of common stock — 9 18 Cash dividends paid (20,915 ) (14,706 ) (11,173 ) Excess tax benefit for share-based payments 25 — 26 Net cash used in financing activities (22,270 ) (15,205 ) (16,609 ) Net increase in cash and cash equivalents 4,480 1,282 3,551 Cash and cash equivalents at the beginning of year 9,320 8,038 4,487 Cash and cash equivalents at the end of year $ 13,800 $ 9,320 $ 8,038 Supplemental cash flow information: Interest paid $ 513 $ 364 $ 433

Summarized Quarterly Informat_2

Summarized Quarterly Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Summarized Quarterly Information (Unaudited) [Abstract]
Schedule of Quarterly Financial Information	2018 (Dollars in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Total interest income $ 33,226 $ 37,769 $ 39,631 $ 40,638 Total interest expense 3,867 4,961 6,307 6,517 Net interest income 29,359 32,808 33,324 34,121 Provision for loan losses 1,983 1,188 1,302 975 Net gain (loss) on investment securities 1 (147 ) — — Net gain (loss) on asset disposals and other transactions 74 (405 ) 12 (15 ) Total non-interest income excluding net gains and losses 14,894 13,807 14,341 14,192 Amortization of other intangible assets 754 861 862 861 Acquisition-related expenses 149 6,056 675 382 Total non-interest expense excluding amortization of other intangible assets and acquisition-related expenses 27,318 29,054 29,292 29,713 Income tax expense 2,383 1,012 2,821 2,470 Net income $ 11,741 $ 7,892 $ 12,725 $ 13,897 Earnings per common share - basic $ 0.64 $ 0.41 $ 0.65 $ 0.71 Earnings per common share - diluted $ 0.64 $ 0.41 $ 0.65 $ 0.71 Weighted-average common shares outstanding - basic 18,126,089 19,160,728 19,325,457 19,337,403 Weighted-average common shares outstanding - diluted 18,256,035 19,293,381 19,466,865 19,483,452 2017 (Dollars in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Total interest income $ 29,817 $ 31,208 $ 32,728 $ 32,772 Total interest expense 2,872 3,118 3,508 3,650 Net interest income 26,945 28,090 29,220 29,122 Provision for loan losses 624 947 1,086 1,115 Net gain on investment securities 340 18 1,861 764 Net (loss) gain on asset disposals and other transactions (3 ) 109 (25 ) (144 ) Total non-interest income excluding net gains and losses 13,334 13,590 12,610 13,119 Amortization of other intangible assets 863 871 869 913 Acquisition-related expenses — — — 341 Total non-interest expense excluding amortization of other intangible and system conversion expenses 26,468 25,809 25,689 26,152 Income tax expense 3,852 4,414 5,127 5,339 Net income $ 8,809 $ 9,766 $ 10,895 $ 9,001 Earnings per common share - basic $ 0.49 $ 0.54 $ 0.60 $ 0.50 Earnings per common share - diluted $ 0.48 $ 0.53 $ 0.60 $ 0.49 Weighted-average common shares outstanding - basic 18,029,991 18,044,574 18,056,202 18,069,467 Weighted-average common shares outstanding - diluted 18,192,957 18,203,752 18,213,533 18,240,092

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table details Peoples' revenue from contracts with customers for the year ended December 31, 2018: (Dollars in thousands) Insurance income: Commission and fees from sale of insurance policies (a) $ 12,787 Fees related to third-party administration services (a) 573 Performance-based commissions (b) 1,452 Trust and investment income (a) 12,543 Electronic banking income: Interchange income (a) 9,721 Promotional and usage income (a) 1,756 Deposit account service charges: Ongoing maintenance fees for deposit accounts (a) 2,718 Transactional-based fees (b) 7,060 Commercial loan swap fees (b) 681 Other non-interest income transactional-based fees (b) 961 Total $ 50,252 Timing of revenue recognition: Services transferred over time $ 40,098 Services transferred at a point in time 10,154 Total $ 50,252 (a) Services transferred over time. (b) Services transferred at a point in time.
Contract with Customer, Asset and Liability [Table Text Block]	The following table details the change in Peoples' contract assets and contract liabilities for the period ended December 31, 2018 : (Dollars in thousands) Contract Assets Contract Liabilities Balance, January 1, 2018 (a) $ — $ 4,700 Additional income receivable 207 — Additional deferred income — 5,055 Recognition of income previously deferred — (4,700 ) Balance, December 31, 2018 $ 207 $ 5,055 (a) The amount of $3.7 million reported elsewhere throughout this Form 10-K is the $4.7 million noted above, net of statutory federal corporate income taxes.

Derivative Financial Instrume_2

Derivative Financial Instrument (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Derivatives [Table Text Block]	The following table summarizes information about the interest-rate swaps designated as cash flow hedges at December 31: (Dollars in thousands) 2018 2017 Notional amount $ 110,000 $ 60,000 Weighted average pay rates 2.37 % 1.88 % Weighted average receive rates 2.57 % 2.30 % Weighted average maturity 2/24/2025 12/29/2024 Unrealized gains $ 860 $ 1,129
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table presents net gains recorded in accumulated other comprehensive income and in the Consolidated Statements of Income related to the cash flow hedges for the years ended December 31: (Dollars in thousands) 2018 2017 Amount of loss recognized in accumulated other comprehensive income, net of tax $ 341 $ 72 Amount of gain recognized in other non-interest income 18 —
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The following table reflects the cash flow hedges included in the Consolidated Balance Sheets at December 31: (Dollars in thousands) 2018 2017 Notional Amount Fair Value Notional Amount Fair Value Included in other assets: Interest rate swaps related to debt $ 60,000 $ 2,093 $ 40,000 $ 1,623 Total included in other assets 60,000 2,093 40,000 1,623 Included in liabilities: Interest rate swaps related to debt $ 50,000 $ 1,111 $ 20,000 $ 270 Total included in other liabilities 50,000 1,111 20,000 270
Derivatives Not Designated as Hedging Instruments [Table Text Block]	The following table reflects the non-designated hedges included in the Consolidated Balance Sheets at December 31: (Dollars in thousands) 2018 2017 Notional Amount Fair Value Notional Amount Fair Value Included in other assets: Interest rate swaps related to commercial loans $ 226,662 $ 2,451 $ 181,659 $ 2,971 Total included in other assets 226,662 2,451 181,659 2,971 Included in liabilities: Interest rate swaps related to commercial loans $ 226,662 $ 2,451 $ 181,659 $ 2,971 Total included in other liabilities 226,662 2,451 181,659 2,971

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2019
Accounting Policies [Abstract]
Restricted Cash	$ 0				$ 1,000,000				$ 0	$ 1,000,000
Deferred Loan Costs	9,500,000				7,500,000				9,500,000	7,500,000
Individual review of impairment of unpaid principal balances in excess of	1,000,000								1,000,000
Annual review of loan relationships in excess of	1,000,000								1,000,000
Unamortized Amount of Investments in Affordable Housing Limited Partnerships	9,600,000				4,700,000				9,600,000	4,700,000
Other Real Estate Owned	94,000				208,000				94,000	208,000
Income tax expense	$ 2,470,000	$ 2,821,000	$ 1,012,000	$ 2,383,000	$ 5,339,000	$ 3,852,000	$ 4,414,000	$ 5,127,000	8,686,000	18,732,000	$ 14,125,000
Finite-Lived Intangible Assets [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax									3,700,000
Other non-interest income (a)									$ 2,655,000	1,865,000	$ 1,826,000
Operating Lease, Right-of-Use Asset												$ 5,200,000
Operating Lease, Liability												$ 5,300,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated lives									7 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated lives									10 years
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Finite-Lived Intangible Assets [Line Items]
Other non-interest income (a)									$ 369,000
Adjustments for New Accounting Pronouncement [Member]
Accounting Policies [Abstract]
Income tax expense									700,000	$ 900,000
Finite-Lived Intangible Assets [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax									$ 3,700,000

Fair Value of Financial Instr_3

Fair Value of Financial Instruments Recurring basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018
Investments
Total available-for-sale securities	$ 795,187	$ 791,891
Other investment securities (a)	38,371	42,985
Derivative assets (b)	4,600	4,500
Derivative liabilities (c)	3,200	3,600
Unrealized Gain (Loss) on Investments	6,500
States and political subdivisions
Investments
Total available-for-sale securities	101,569	88,587
Residential mortgage-backed securities
Investments
Total available-for-sale securities	673,664	692,608
Commercial mortgage-backed securities
Investments
Total available-for-sale securities	6,976	6,707
Bank-issued trust preferred securities
Investments
Total available-for-sale securities	5,129	3,989
Equity investment securities (a)
Investments
Total available-for-sale securities	7,849
Other investment securities (a)	0	277
Level 1 | Recurring Basis
Investments
Total available-for-sale securities	7,694	0
Level 1 | States and political subdivisions | Recurring Basis
Investments
Total available-for-sale securities	0	0
Level 1 | Residential mortgage-backed securities | Recurring Basis
Investments
Total available-for-sale securities	0	0
Level 1 | Commercial mortgage-backed securities | Recurring Basis
Investments
Total available-for-sale securities	0	0
Level 1 | Bank-issued trust preferred securities | Recurring Basis
Investments
Total available-for-sale securities	0	0
Level 1 | Equity investment securities (a) | Recurring Basis
Investments
Total available-for-sale securities	7,694	0
Other investment securities (a)		94
Level 2
Investments
Other investment securities (a)	38,371	42,708
Level 2 | Recurring Basis
Investments
Total available-for-sale securities	787,493	791,891
Derivative assets (b)	4,594	4,544
Derivative liabilities (c)	3,241	3,562
Level 2 | States and political subdivisions | Recurring Basis
Investments
Total available-for-sale securities	101,569	88,587
Level 2 | Residential mortgage-backed securities | Recurring Basis
Investments
Total available-for-sale securities	673,664	692,608
Level 2 | Commercial mortgage-backed securities | Recurring Basis
Investments
Total available-for-sale securities	6,976	6,707
Level 2 | Bank-issued trust preferred securities | Recurring Basis
Investments
Total available-for-sale securities	5,129	3,989
Level 2 | Equity investment securities (a) | Recurring Basis
Investments
Total available-for-sale securities	155	0
Other investment securities (a)		183
Level 3 | Recurring Basis
Investments
Total available-for-sale securities	0	0
Level 3 | States and political subdivisions | Recurring Basis
Investments
Total available-for-sale securities	0	0
Level 3 | Residential mortgage-backed securities | Recurring Basis
Investments
Total available-for-sale securities	0	0
Level 3 | Commercial mortgage-backed securities | Recurring Basis
Investments
Total available-for-sale securities	0	0
Level 3 | Bank-issued trust preferred securities | Recurring Basis
Investments
Total available-for-sale securities	0	0
Level 3 | Equity investment securities (a) | Recurring Basis
Investments
Total available-for-sale securities	$ 0	$ 0

Fair Value of Financial Instr_4

Fair Value of Financial Instruments Nonrecurring Basis (Details) - USD ($)	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018
Assets measured on nonrecurring basis
OREO	$ 94,000				$ 208,000				$ 94,000
Losses on impaired loans charged through allowance for loan losses	975,000	$ 1,302,000	$ 1,188,000	$ 1,983,000	1,115,000	$ 624,000	$ 947,000	$ 1,086,000
Nonrecurring Basis
Assets measured on nonrecurring basis
Losses on impaired loans charged through allowance for loan losses									207,000
Nonrecurring Basis | Level 3
Assets measured on nonrecurring basis
Impaired loans	24,129,000				20,602,000				24,129,000
OREO	94,000				$ 208,000				94,000
Impaired loans, aggregate outstanding principal balance	24,100,000								24,100,000
Nonrecurring Basis | Level 2
Assets measured on nonrecurring basis
Impaired loans, aggregate outstanding principal balance	$ 30,100,000								$ 30,100,000

Fair Value of Financial Instr_5

Fair Value of Financial Instruments (Fair Values of Financial Assets and Liabilities on Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets:
Held-to-maturity investment securities, at amortized cost (fair value of $36,963 at December 31, 2018 and $41,213 at December 31, 2017)	$ 36,961	$ 40,928
Held-to-maturity securities, fair value	36,963	41,213
FHLB stock	29,367	28,132
FRB stock	12,294	10,179
Other investment securities (a)	42,985	38,371
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Other	5,470	2,510
Bank owned life insurance	68,934	62,176
Carrying Amount
Assets:
Cash and cash equivalents	77,612	72,194
Held-to-maturity investment securities, at amortized cost (fair value of $36,963 at December 31, 2018 and $41,213 at December 31, 2017)	36,961	40,928
Other investment securities (a)	42,708	38,371
Net loans	2,708,583	2,338,344
Servicing rights (c)	2,655	2,305
Financial liabilities:
Deposits	2,955,465	2,730,330
Short-term borrowings	356,198	209,491
Long-term borrowings	109,644	144,019
Portion at Fair Value Measurement [Member]
Assets:
Cash and cash equivalents	77,612	72,194
Net loans	2,907,537	2,274,194
Servicing rights (c)	4,568	3,866
Financial liabilities:
Deposits	2,953,452	2,730,071
Short-term borrowings	349,994	209,628
Long-term borrowings	101,736	142,108
Level 2
Assets:
Held-to-maturity securities, fair value	36,963	41,213
Other investment securities (a)	42,708	38,371
Recurring Basis | Level 2
Assets:
FHLB stock	29,367	28,132
FRB stock	12,294	10,179
Loans Held-for-sale, Fair Value Disclosure	5,492	2,569
States and political subdivisions
Assets:
Held-to-maturity securities, fair value	4,896	4,417
States and political subdivisions | Carrying Amount
Assets:
Held-to-maturity investment securities, at amortized cost (fair value of $36,963 at December 31, 2018 and $41,213 at December 31, 2017)	4,403	3,810
States and political subdivisions | Level 2
Assets:
Held-to-maturity securities, fair value	4,896	4,417
Residential mortgage-backed securities
Assets:
Held-to-maturity securities, fair value	28,603	32,227
Residential mortgage-backed securities | Carrying Amount
Assets:
Held-to-maturity investment securities, at amortized cost (fair value of $36,963 at December 31, 2018 and $41,213 at December 31, 2017)	29,044	32,487
Residential mortgage-backed securities | Level 2
Assets:
Held-to-maturity securities, fair value	28,603	32,227
Commercial mortgage-backed securities
Assets:
Held-to-maturity securities, fair value	3,464	4,569
Commercial mortgage-backed securities | Carrying Amount
Assets:
Held-to-maturity investment securities, at amortized cost (fair value of $36,963 at December 31, 2018 and $41,213 at December 31, 2017)	3,514	4,631
Commercial mortgage-backed securities | Level 2
Assets:
Held-to-maturity securities, fair value	3,464	4,569
Non-qualified Deferred Compensation [Member] | Recurring Basis
Assets:
Other investment securities (a)	987
FHLMC Stock [Member] | Recurring Basis
Assets:
Other investment securities (a)	$ 60
FHLMC Stock [Member] | Recurring Basis | Level 2
Assets:
Other investment securities (a)		$ 60

Investment Securities Available

Investment Securities Available-for-sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities
Amortized Cost	$ 804,655	$ 797,732
Gross Unrealized Gains	3,582	11,040
Gross Unrealized Losses	(16,346)	(13,585)
Fair Value	791,891	795,187
Securities of a single issuer, other than US Treasury, government agencies and US government sponsored agencies exceeding 10% of Stockholders' Equity	0
States and political subdivisions
Schedule of Available-for-sale Securities
Amortized Cost	88,358	100,039
Gross Unrealized Gains	787	1,786
Gross Unrealized Losses	(558)	(256)
Fair Value	88,587	101,569
Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	705,289	684,100
Gross Unrealized Gains	2,720	2,582
Gross Unrealized Losses	(15,401)	(13,018)
Fair Value	692,608	673,664
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	6,812	7,004
Gross Unrealized Gains	0	11
Gross Unrealized Losses	(105)	(39)
Fair Value	6,707	6,976
Bank-issued trust preferred securities
Schedule of Available-for-sale Securities
Amortized Cost	4,196	5,195
Gross Unrealized Gains	75	141
Gross Unrealized Losses	(282)	(207)
Fair Value	$ 3,989	5,129
Equity investment securities (a)
Schedule of Available-for-sale Securities
Amortized Cost		1,394
Gross Unrealized Gains		6,520
Gross Unrealized Losses		(65)
Fair Value		$ 7,849

Investment Securities Availab_2

Investment Securities Available-for-sale gross gains and losses realized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Gross gains and gross losses realized from sales of available-for-sale securities:
Gross gains realized	$ 6	$ 2,999	$ 933
Gross losses realized	152	16	3
Net gain realized	$ (146)	$ 2,983	$ 930

Investment Securities Availab_3

Investment Securities Available-for-sale Securities with Unrealized Losses (Details)	12 Months Ended
	Dec. 31, 2018USD ($)securities	Dec. 31, 2017USD ($)securities
Available-for-sale securities that had an unrealized loss:
Fair value of securities in unrealized loss position less than 12 months	$ 57,735,000	$ 294,746,000
Unrealized loss less than 12 months	$ 244,000	$ 3,575,000
Number of securities at an unrealized loss position less than 12 months | securities	67	97
Fair value of securities in unrealized loss more than 12 months	$ 545,678,000	$ 301,298,000
Unrealized loss more than 12 months	$ 16,102,000	$ 10,010,000
Number of securities at an unrealized loss position more than 12 months | securities	195	94
Fair value of securities in unrealized loss	$ 603,413,000	$ 596,044,000
Unrealized loss	16,346,000	13,585,000
Other-than-temporary impairments	$ 0
Mortgage-backed securities issued by US Government sponsored agencies
Available-for-sale securities that had an unrealized loss:
Percentage of mortgage-backed securities in unrealized loss position for less than 12 months	99.00%
Mortgage-backed securities privately issued
Available-for-sale securities that had an unrealized loss:
Number of securities at an unrealized loss position less than 12 months | securities	2
Percentage of mortgage-backed securities in unrealized loss position for less than 12 months	1.00%
Fair value within book value	90.00%
States and political subdivisions
Available-for-sale securities that had an unrealized loss:
Fair value of securities in unrealized loss position less than 12 months	$ 10,173,000	16,985,000
Unrealized loss less than 12 months	$ 18,000	$ 89,000
Number of securities at an unrealized loss position less than 12 months | securities	17	18
Fair value of securities in unrealized loss more than 12 months	$ 19,918,000	$ 5,308,000
Unrealized loss more than 12 months	$ 540,000	$ 167,000
Number of securities at an unrealized loss position more than 12 months | securities	20	1
Fair value of securities in unrealized loss	$ 30,091,000	$ 22,293,000
Unrealized loss	558,000	256,000
Residential mortgage-backed securities
Available-for-sale securities that had an unrealized loss:
Fair value of securities in unrealized loss position less than 12 months	47,562,000	274,998,000
Unrealized loss less than 12 months	$ 226,000	$ 3,462,000
Number of securities at an unrealized loss position less than 12 months | securities	50	77
Fair value of securities in unrealized loss more than 12 months	$ 517,335,000	$ 291,812,000
Unrealized loss more than 12 months	$ 15,175,000	$ 9,556,000
Number of securities at an unrealized loss position more than 12 months | securities	170	88
Fair value of securities in unrealized loss	$ 564,897,000	$ 566,810,000
Unrealized loss	15,401,000	13,018,000
Commercial mortgage-backed securities
Available-for-sale securities that had an unrealized loss:
Fair value of securities in unrealized loss position less than 12 months	0	2,487,000
Unrealized loss less than 12 months	$ 0	$ 23,000
Number of securities at an unrealized loss position less than 12 months | securities	0	1
Fair value of securities in unrealized loss more than 12 months	$ 6,707,000	$ 1,274,000
Unrealized loss more than 12 months	$ 105,000	$ 16,000
Number of securities at an unrealized loss position more than 12 months | securities	3	1
Fair value of securities in unrealized loss	$ 6,707,000	$ 3,761,000
Unrealized loss	105,000	39,000
Bank-issued trust preferred securities
Available-for-sale securities that had an unrealized loss:
Fair value of securities in unrealized loss position less than 12 months	0	0
Unrealized loss less than 12 months	$ 0	$ 0
Number of securities at an unrealized loss position less than 12 months | securities	0	0
Fair value of securities in unrealized loss more than 12 months	$ 1,718,000	$ 2,792,000
Unrealized loss more than 12 months	$ 282,000	$ 207,000
Number of securities at an unrealized loss position more than 12 months | securities	2	3
Fair value of securities in unrealized loss	$ 1,718,000	$ 2,792,000
Unrealized loss	$ 282,000	207,000
Number of available-for-sale securities in unrealized loss position | securities	2
Equity investment securities (a)
Available-for-sale securities that had an unrealized loss:
Fair value of securities in unrealized loss position less than 12 months		276,000
Unrealized loss less than 12 months		$ 1,000
Number of securities at an unrealized loss position less than 12 months | securities		1
Fair value of securities in unrealized loss more than 12 months		$ 112,000
Unrealized loss more than 12 months		$ 64,000
Number of securities at an unrealized loss position more than 12 months | securities		1
Fair value of securities in unrealized loss		$ 388,000
Unrealized loss		$ 65,000
Fair Value Less Than 90 Percent of Book Value | Mortgage-backed securities privately issued
Available-for-sale securities that had an unrealized loss:
Fair value of securities in unrealized loss more than 12 months	$ 145,000
Mortgage-backed securities in unrealized loss position for less than 12 months, aggregate book value	$ 216,000

Investment Securities Availab_4

Investment Securities Available-for-sale Securities by Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities
Amortized cost of securities maturing within 1 year	$ 1,673
Amortized cost of securities maturing in 1-5 years	33,770
Amortized cost of securities maturing in 5-10 years	78,574
Amortized cost of securities maturing in over 10 years	690,638
Amortized Cost	804,655	$ 797,732
Fair value of securities maturing within 1 year	1,666
Fair value of securities maturing in 1-5 years	33,518
Fair value of securities maturing in 5-10 years	77,341
Fair value of securities maturing in over 10 years	679,366
Fair Value	$ 791,891	795,187
Average yield of securities maturing within 1 year	2.26%
Average yield of securities maturing in 1-5 years	2.35%
Average yield of securities maturing in 5-10 years	2.77%
Average yield of securities maturing in over 10 years	2.93%
Total average yield	2.89%
States and political subdivisions
Schedule of Available-for-sale Securities
Amortized cost of securities maturing within 1 year	$ 891
Amortized cost of securities maturing in 1-5 years	15,910
Amortized cost of securities maturing in 5-10 years	23,094
Amortized cost of securities maturing in over 10 years	48,463
Total amortized cost	88,358
Amortized Cost	88,358	100,039
Fair value of securities maturing within 1 year	888
Fair value of securities maturing in 1-5 years	15,900
Fair value of securities maturing in 5-10 years	23,188
Fair value of securities maturing in over 10 years	48,611
Total fair value	88,587
Fair Value	88,587	101,569
Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized cost of securities maturing within 1 year	782
Amortized cost of securities maturing in 1-5 years	12,194
Amortized cost of securities maturing in 5-10 years	51,284
Amortized cost of securities maturing in over 10 years	641,029
Total amortized cost	705,289
Amortized Cost	705,289	684,100
Fair value of securities maturing within 1 year	778
Fair value of securities maturing in 1-5 years	12,031
Fair value of securities maturing in 5-10 years	50,164
Fair value of securities maturing in over 10 years	629,635
Total fair value	692,608
Fair Value	692,608	673,664
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized cost of securities maturing within 1 year	0
Amortized cost of securities maturing in 1-5 years	5,666
Amortized cost of securities maturing in 5-10 years	0
Amortized cost of securities maturing in over 10 years	1,146
Total amortized cost	6,812
Amortized Cost	6,812	7,004
Fair value of securities maturing within 1 year	0
Fair value of securities maturing in 1-5 years	5,587
Fair value of securities maturing in 5-10 years	0
Fair value of securities maturing in over 10 years	1,120
Total fair value	6,707
Fair Value	6,707	6,976
Bank-issued trust preferred securities
Schedule of Available-for-sale Securities
Amortized cost of securities maturing in 5-10 years	4,196
Amortized cost of securities maturing in over 10 years	0
Amortized cost of other securities	4,196
Amortized Cost	4,196	5,195
Fair value of securities maturing in 5-10 years	3,989
Fair value of securities maturing in over 10 years	0
Total fair value	3,989
Fair Value	$ 3,989	5,129
Equity investment securities (a)
Schedule of Available-for-sale Securities
Amortized Cost		1,394
Fair Value		$ 7,849

Investment Securities Held-to-m

Investment Securities Held-to-maturity Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities
Held-to-maturity investment securities, at amortized cost (fair value of $36,963 at December 31, 2018 and $41,213 at December 31, 2017)	$ 36,961,000	$ 40,928,000
Amortized Cost	36,961,000	40,928,000
Gross Unrealized Gains	684,000	876,000
Gross Unrealized Losses	682,000	591,000
Fair Value	36,963,000	41,213,000
Gross realized gains or losses	0	0	$ 0
States and political subdivisions
Schedule of Held-to-maturity Securities
Amortized Cost	4,403,000
Gross Unrealized Gains	493,000	607,000
Gross Unrealized Losses	0	0
Fair Value	4,896,000	4,417,000
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities
Amortized Cost	29,044,000
Gross Unrealized Gains	191,000	269,000
Gross Unrealized Losses	632,000	529,000
Fair Value	28,603,000	32,227,000
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities
Amortized Cost	3,514,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	50,000	62,000
Fair Value	$ 3,464,000	$ 4,569,000

Investment Securities Held-to_2

Investment Securities Held-to-maturity Securities with Unrealized Loss (Details) $ in Thousands	Dec. 31, 2018USD ($)securities	Dec. 31, 2017USD ($)securities
Schedule of Held-to-maturity Securities
Fair value of securities in unrealized loss position less than 12 months	$ 0	$ 1,476
Unrealized loss less than 12 months	$ 0	$ 4
Number of securities at an unrealized loss position less than 12 months | securities	0	2
Fair value of securities in unrealized loss more than 12 months	$ 16,566	$ 16,667
Unrealized loss more than 12 months	$ 682	$ 587
Number of securities at an unrealized loss position more than 12 months | securities	6	4
Total fair value	$ 16,566	$ 18,143
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	682	591
States and political subdivisions
Schedule of Held-to-maturity Securities
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	0	0
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities
Fair value of securities in unrealized loss position less than 12 months	0	1,476
Unrealized loss less than 12 months	$ 0	$ 4
Number of securities at an unrealized loss position less than 12 months | securities	0	2
Fair value of securities in unrealized loss more than 12 months	$ 13,102	$ 12,098
Unrealized loss more than 12 months	$ 632	$ 525
Number of securities at an unrealized loss position more than 12 months | securities	5	3
Total fair value	$ 13,102	$ 13,574
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	632	529
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities
Fair value of securities in unrealized loss position less than 12 months	0	0
Unrealized loss less than 12 months	$ 0	$ 0
Number of securities at an unrealized loss position less than 12 months | securities	0	0
Fair value of securities in unrealized loss more than 12 months	$ 3,464	$ 4,569
Unrealized loss more than 12 months	$ 50	$ 62
Number of securities at an unrealized loss position more than 12 months | securities	1	1
Total fair value	$ 3,464	$ 4,569
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	$ 50	$ 62

Investment Securities Held-to_3

Investment Securities Held-to-maturity Securities by Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost	$ 0
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost	730
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost	11,009
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost	25,222
Amortized Cost	36,961	$ 40,928
Fair value of securities maturing within 1 year	0
Fair value of securities maturing in 1-5 years	724
Fair value of securities maturing in 5-10 years	11,629
Fair value of securities maturing in over 10 years	24,610
Fair Value	$ 36,963	41,213
Average yield of securities maturing within 1 year	0.00%
Average yield of securities maturing in 1-5 years	2.43%
Average yield of securities maturing in 5-10 years	2.89%
Average yield of securities maturing in over 10 years	2.78%
Total average yield	2.80%
States and political subdivisions
Schedule of Held-to-maturity Securities
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost	$ 0
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost	308
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost	2,982
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost	1,113
Amortized Cost	4,403
Fair value of securities maturing within 1 year	0
Fair value of securities maturing in 1-5 years	308
Fair value of securities maturing in 5-10 years	3,466
Fair value of securities maturing in over 10 years	1,122
Fair Value	4,896	4,417
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost	0
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost	422
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost	8,027
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost	20,595
Amortized Cost	29,044
Fair value of securities maturing within 1 year	0
Fair value of securities maturing in 1-5 years	416
Fair value of securities maturing in 5-10 years	8,163
Fair value of securities maturing in over 10 years	20,024
Fair Value	28,603	32,227
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost	0
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost	0
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost	0
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost	3,514
Amortized Cost	3,514
Fair value of securities maturing within 1 year	0
Fair value of securities maturing in 1-5 years	0
Fair value of securities maturing in 5-10 years	0
Fair value of securities maturing in over 10 years	3,464
Fair Value	$ 3,464	$ 4,569

Investment Securities Other Inv

Investment Securities Other Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Investment [Line Items]
Other Investments and Securities, at Cost			$ 7,800,000
Securities of a single issuer, other than US Treasury, government agencies and US government sponsored agencies exceeding 10% of Stockholders' Equity	$ 0
Other comprehensive loss, net of tax (b)	5,020,000
FHLB stock	29,367,000		28,132,000
FRB stock	12,294,000		10,179,000
Other investment securities (a)	42,985,000		38,371,000
Other investment securities (a)	42,985,000		38,371,000
Trading Securities, Change in Unrealized Holding Gain (Loss)	206,000
Equity investment securities (a)
Investment [Line Items]
Other investment securities (a)	277,000		0
Non-qualified Deferred Compensation [Member]
Investment [Line Items]
Other investment securities (a)		$ 987,000	0
FHLMC Stock [Member]
Investment [Line Items]
Other investment securities (a)	$ 60,000		$ 60,000

Investment Securities Pledged S

Investment Securities Pledged Securities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Investments [Abstract]
Carrying value of available-for-sale securities pledged to secure public and trust department deposits and repurchase agreements	$ 430	$ 522.7
Carrying value of held-to-maturity securities pledged to secure public and trust department deposits and repurchase agreements	16.9	18.3
Carrying value of available-for-sale securities pledged to secure additional borrowing capacity at FHLB and FRB	60.1	6.7
Carrying value of held-to-maturity securities pledged to secure additional borrowing capacity at FHLB and FRB	$ 16.7	$ 19.9

Loans (Narrative) (Details)

Loans (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Residential real estate
Loans
Pledged commercial and residential loans to secure borrowings from FHLB and FRB	$ 505.7	$ 487.2
Commerical Loans
Loans
Pledged commercial and residential loans to secure borrowings from FHLB and FRB	$ 180.9	$ 74

Loans Loan Balances By Classifi

Loans Loan Balances By Classification (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Loans
Balance	$ 2,728,778	$ 2,357,137
Loan Type
Loans
Balance	2,728,778	2,357,137
Financial Asset Originated [Member] | Loan Type
Loans
Balance	2,156,030	1,942,290
Financial Asset Originated [Member] | Commercial real estate, construction
Loans
Balance	124,013	107,118
Financial Asset Originated [Member] | Commercial real estate
Loans
Balance	756,213	702,565
Financial Asset Originated [Member] | Commercial and industrial
Loans
Balance	530,207	438,051
Financial Asset Originated [Member] | Residential real estate
Loans
Balance	296,860	304,523
Financial Asset Originated [Member] | Home equity lines of credit
Loans
Balance	93,326	88,902
Financial Asset Originated [Member] | Consumer, indirect
Loans
Balance	407,167	340,390
Financial Asset Originated [Member] | Consumer, direct
Loans
Balance	71,674	67,010
Financial Asset Originated [Member] | Consumer
Loans
Balance	478,841	407,400
Financial Asset Originated [Member] | Deposit account overdrafts
Loans
Balance	583	849
Acquired Loans | Loan Type
Loans
Balance	572,748	414,847
Acquired Loans | Commercial real estate, construction
Loans
Balance	12,404	8,319
Acquired Loans | Commercial real estate
Loans
Balance	197,115	173,439
Acquired Loans | Commercial and industrial
Loans
Balance	35,537	34,493
Acquired Loans | Residential real estate
Loans
Balance	296,937	184,864
Acquired Loans | Home equity lines of credit
Loans
Balance	40,653	20,575
Acquired Loans | Consumer, indirect
Loans
Balance	136	329
Acquired Loans | Consumer, direct
Loans
Balance	2,370	1,147
Acquired Loans | Consumer
Loans
Balance	$ 2,506	$ 1,476

Loans Purchased credit impaired

Loans Purchased credit impaired loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Purchased credit impaired loans
Carrying Amount	$ 22,475	$ 19,564
Loan Type
Purchased credit impaired loans
Outstanding Balance	33,362	28,449
Commercial real estate, other
Purchased credit impaired loans
Outstanding Balance	11,955	8,117
Commercial and industrial
Purchased credit impaired loans
Outstanding Balance	1,287	767
Residential real estate
Purchased credit impaired loans
Outstanding Balance	20,062	19,532
Consumer
Purchased credit impaired loans
Outstanding Balance	$ 58	$ 33

Loans Accretable Yield Rollforw

Loans Accretable Yield Rollforward (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Loans
Balance, beginning of period	$ 7,132	$ 6,704	$ 7,132
Reclassification from nonaccretable to accretable	1,285	2,019
ASB	$ 7,132	6,704	7,132
Accretion		(1,815)	(1,713)
Balance, December 31		8,955	$ 6,704
ASB Financial Corp.
Loans
ASB		2,047
Balance, December 31		$ 2,047

Loans Related Party Loans (Deta

Loans Related Party Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Loans
Loans and Leases Receivable, Related Parties	$ 15,102
Loans and Leases Receivable, Related Parties, Additions	5,508
Proceeds from (Repayments of) Related Party Debt	(3,720)
Other related party changes	(101)
Loans and Leases Receivable, Related Parties	$ 16,789

Loans Nonaccrual and Past Due L

Loans Nonaccrual and Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Loans
Nonaccrual Loans	$ 17,098	$ 15,692
Accruing Loans 90 Days Past Due	2,256	1,626
Financial Asset Originated [Member]
Loans
Nonaccrual Loans	14,185	12,761
Accruing Loans 90 Days Past Due	1,191	614
Financial Asset Originated [Member] | Commercial real estate, construction
Loans
Nonaccrual Loans	710	754
Accruing Loans 90 Days Past Due	0	0
Financial Asset Originated [Member] | Commercial real estate, other
Loans
Nonaccrual Loans	6,565	6,877
Accruing Loans 90 Days Past Due	786	0
Financial Asset Originated [Member] | Commercial real estate
Loans
Nonaccrual Loans	7,275	7,631
Accruing Loans 90 Days Past Due	786	0
Financial Asset Originated [Member] | Commercial and industrial
Loans
Nonaccrual Loans	1,673	739
Accruing Loans 90 Days Past Due	0	0
Financial Asset Originated [Member] | Residential real estate
Loans
Nonaccrual Loans	4,105	3,546
Accruing Loans 90 Days Past Due	398	548
Financial Asset Originated [Member] | Home equity lines of credit
Loans
Nonaccrual Loans	596	550
Accruing Loans 90 Days Past Due	7	50
Financial Asset Originated [Member] | Consumer, indirect
Loans
Nonaccrual Loans	480	256
Accruing Loans 90 Days Past Due	0	0
Financial Asset Originated [Member] | Consumer, direct
Loans
Nonaccrual Loans	56	39
Accruing Loans 90 Days Past Due	0	16
Financial Asset Originated [Member] | Consumer
Loans
Nonaccrual Loans	536	295
Accruing Loans 90 Days Past Due	0	16
Acquired Loans
Loans
Nonaccrual Loans	2,913	2,931
Accruing Loans 90 Days Past Due	1,065	1,012
Acquired Loans | Commercial real estate, other
Loans
Nonaccrual Loans	319	192
Accruing Loans 90 Days Past Due	15	215
Acquired Loans | Commercial and industrial
Loans
Nonaccrual Loans	36	259
Accruing Loans 90 Days Past Due	18	45
Acquired Loans | Residential real estate
Loans
Nonaccrual Loans	1,921	2,168
Accruing Loans 90 Days Past Due	1,032	730
Acquired Loans | Home equity lines of credit
Loans
Nonaccrual Loans	637	312
Accruing Loans 90 Days Past Due	$ 0	$ 22

Loans Aging Of The Recorded Inv

Loans Aging Of The Recorded Investment In Past Due Loans And Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Loans
Percent of Loans Considered Current	98.50%	98.60%
Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	$ 41,518	$ 32,916
Current	2,687,260	2,324,221
Financial Asset Originated [Member] | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	28,786	22,301
Current	2,127,244	1,919,989
Financial Asset Originated [Member] | Commercial real estate, construction
Loans
Financing Receivable, Recorded Investment, Past Due	710	0
Current	123,303	107,118
Financial Asset Originated [Member] | Commercial real estate, other
Loans
Financing Receivable, Recorded Investment, Past Due	7,899	7,482
Current	624,301	587,965
Financial Asset Originated [Member] | Commercial real estate
Loans
Financing Receivable, Recorded Investment, Past Due	8,609	7,482
Current	747,604	695,083
Financial Asset Originated [Member] | Commercial and industrial
Loans
Financing Receivable, Recorded Investment, Past Due	6,495	2,221
Current	523,712	435,830
Financial Asset Originated [Member] | Residential real estate
Loans
Financing Receivable, Recorded Investment, Past Due	8,371	8,204
Current	288,489	296,319
Financial Asset Originated [Member] | Home equity lines of credit
Loans
Financing Receivable, Recorded Investment, Past Due	992	977
Current	92,334	87,925
Financial Asset Originated [Member] | Consumer, indirect
Loans
Financing Receivable, Recorded Investment, Past Due	3,919	2,906
Current	403,248	337,484
Financial Asset Originated [Member] | Consumer, direct
Loans
Financing Receivable, Recorded Investment, Past Due	400	511
Current	71,274	66,499
Financial Asset Originated [Member] | Consumer
Loans
Financing Receivable, Recorded Investment, Past Due	4,319	3,417
Current	474,522	403,983
Financial Asset Originated [Member] | Deposit account overdrafts
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
Current	583	849
Acquired Loans | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	12,732	10,615
Current	560,016	404,232
Acquired Loans | Commercial real estate, construction
Loans
Financing Receivable, Recorded Investment, Past Due	511	0
Current	11,893	8,319
Acquired Loans | Commercial real estate, other
Loans
Financing Receivable, Recorded Investment, Past Due	1,213	2,035
Current	183,498	163,085
Acquired Loans | Commercial real estate
Loans
Financing Receivable, Recorded Investment, Past Due	1,724	2,035
Current	195,391	171,404
Acquired Loans | Commercial and industrial
Loans
Financing Receivable, Recorded Investment, Past Due	142	172
Current	35,395	34,321
Acquired Loans | Residential real estate
Loans
Financing Receivable, Recorded Investment, Past Due	9,832	7,957
Current	287,105	176,907
Acquired Loans | Home equity lines of credit
Loans
Financing Receivable, Recorded Investment, Past Due	1,005	427
Current	39,648	20,148
Acquired Loans | Consumer, indirect
Loans
Financing Receivable, Recorded Investment, Past Due	0	3
Current	136	326
Acquired Loans | Consumer, direct
Loans
Financing Receivable, Recorded Investment, Past Due	29	21
Current	2,341	1,126
Acquired Loans | Consumer
Loans
Financing Receivable, Recorded Investment, Past Due	29	24
Current	2,477	1,452
30 - 59 days | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	17,782	15,617
30 - 59 days | Financial Asset Originated [Member] | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	10,252	10,047
30 - 59 days | Financial Asset Originated [Member] | Commercial real estate, construction
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
30 - 59 days | Financial Asset Originated [Member] | Commercial real estate, other
Loans
Financing Receivable, Recorded Investment, Past Due	12	990
30 - 59 days | Financial Asset Originated [Member] | Commercial real estate
Loans
Financing Receivable, Recorded Investment, Past Due	12	990
30 - 59 days | Financial Asset Originated [Member] | Commercial and industrial
Loans
Financing Receivable, Recorded Investment, Past Due	1,678	1,423
30 - 59 days | Financial Asset Originated [Member] | Residential real estate
Loans
Financing Receivable, Recorded Investment, Past Due	4,457	4,562
30 - 59 days | Financial Asset Originated [Member] | Home equity lines of credit
Loans
Financing Receivable, Recorded Investment, Past Due	531	502
30 - 59 days | Financial Asset Originated [Member] | Consumer, indirect
Loans
Financing Receivable, Recorded Investment, Past Due	3,266	2,153
30 - 59 days | Financial Asset Originated [Member] | Consumer, direct
Loans
Financing Receivable, Recorded Investment, Past Due	308	417
30 - 59 days | Financial Asset Originated [Member] | Consumer
Loans
Financing Receivable, Recorded Investment, Past Due	3,574	2,570
30 - 59 days | Financial Asset Originated [Member] | Deposit account overdrafts
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
30 - 59 days | Acquired Loans | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	7,530	5,570
30 - 59 days | Acquired Loans | Commercial real estate, construction
Loans
Financing Receivable, Recorded Investment, Past Due	511	0
30 - 59 days | Acquired Loans | Commercial real estate, other
Loans
Financing Receivable, Recorded Investment, Past Due	523	775
30 - 59 days | Acquired Loans | Commercial real estate
Loans
Financing Receivable, Recorded Investment, Past Due	1,034	775
30 - 59 days | Acquired Loans | Commercial and industrial
Loans
Financing Receivable, Recorded Investment, Past Due	111	0
30 - 59 days | Acquired Loans | Residential real estate
Loans
Financing Receivable, Recorded Investment, Past Due	6,124	4,656
30 - 59 days | Acquired Loans | Home equity lines of credit
Loans
Financing Receivable, Recorded Investment, Past Due	238	126
30 - 59 days | Acquired Loans | Consumer, indirect
Loans
Financing Receivable, Recorded Investment, Past Due	0	3
30 - 59 days | Acquired Loans | Consumer, direct
Loans
Financing Receivable, Recorded Investment, Past Due	23	10
30 - 59 days | Acquired Loans | Consumer
Loans
Financing Receivable, Recorded Investment, Past Due	23	13
60 - 89 days | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	8,675	4,451
60 - 89 days | Financial Asset Originated [Member] | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	6,143	2,100
60 - 89 days | Financial Asset Originated [Member] | Commercial real estate, construction
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
60 - 89 days | Financial Asset Originated [Member] | Commercial real estate, other
Loans
Financing Receivable, Recorded Investment, Past Due	736	0
60 - 89 days | Financial Asset Originated [Member] | Commercial real estate
Loans
Financing Receivable, Recorded Investment, Past Due	736	0
60 - 89 days | Financial Asset Originated [Member] | Commercial and industrial
Loans
Financing Receivable, Recorded Investment, Past Due	3,520	92
60 - 89 days | Financial Asset Originated [Member] | Residential real estate
Loans
Financing Receivable, Recorded Investment, Past Due	1,319	1,234
60 - 89 days | Financial Asset Originated [Member] | Home equity lines of credit
Loans
Financing Receivable, Recorded Investment, Past Due	30	80
60 - 89 days | Financial Asset Originated [Member] | Consumer, indirect
Loans
Financing Receivable, Recorded Investment, Past Due	488	648
60 - 89 days | Financial Asset Originated [Member] | Consumer, direct
Loans
Financing Receivable, Recorded Investment, Past Due	50	46
60 - 89 days | Financial Asset Originated [Member] | Consumer
Loans
Financing Receivable, Recorded Investment, Past Due	538	694
60 - 89 days | Financial Asset Originated [Member] | Deposit account overdrafts
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
60 - 89 days | Acquired Loans | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	2,532	2,351
60 - 89 days | Acquired Loans | Commercial real estate, construction
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
60 - 89 days | Acquired Loans | Commercial real estate, other
Loans
Financing Receivable, Recorded Investment, Past Due	457	948
60 - 89 days | Acquired Loans | Commercial real estate
Loans
Financing Receivable, Recorded Investment, Past Due	457	948
60 - 89 days | Acquired Loans | Commercial and industrial
Loans
Financing Receivable, Recorded Investment, Past Due	13	1
60 - 89 days | Acquired Loans | Residential real estate
Loans
Financing Receivable, Recorded Investment, Past Due	1,823	1,391
60 - 89 days | Acquired Loans | Home equity lines of credit
Loans
Financing Receivable, Recorded Investment, Past Due	233	0
60 - 89 days | Acquired Loans | Consumer, indirect
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
60 - 89 days | Acquired Loans | Consumer, direct
Loans
Financing Receivable, Recorded Investment, Past Due	6	11
60 - 89 days | Acquired Loans | Consumer
Loans
Financing Receivable, Recorded Investment, Past Due	6	11
90 Days | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	15,061	12,848
90 Days | Financial Asset Originated [Member] | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	12,391	10,154
90 Days | Financial Asset Originated [Member] | Commercial real estate, construction
Loans
Financing Receivable, Recorded Investment, Past Due	710	0
90 Days | Financial Asset Originated [Member] | Commercial real estate, other
Loans
Financing Receivable, Recorded Investment, Past Due	7,151	6,492
90 Days | Financial Asset Originated [Member] | Commercial real estate
Loans
Financing Receivable, Recorded Investment, Past Due	7,861	6,492
90 Days | Financial Asset Originated [Member] | Commercial and industrial
Loans
Financing Receivable, Recorded Investment, Past Due	1,297	706
90 Days | Financial Asset Originated [Member] | Residential real estate
Loans
Financing Receivable, Recorded Investment, Past Due	2,595	2,408
90 Days | Financial Asset Originated [Member] | Home equity lines of credit
Loans
Financing Receivable, Recorded Investment, Past Due	431	395
90 Days | Financial Asset Originated [Member] | Consumer, indirect
Loans
Financing Receivable, Recorded Investment, Past Due	165	105
90 Days | Financial Asset Originated [Member] | Consumer, direct
Loans
Financing Receivable, Recorded Investment, Past Due	42	48
90 Days | Financial Asset Originated [Member] | Consumer
Loans
Financing Receivable, Recorded Investment, Past Due	207	153
90 Days | Financial Asset Originated [Member] | Deposit account overdrafts
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
90 Days | Acquired Loans | Loan Type
Loans
Financing Receivable, Recorded Investment, Past Due	2,670	2,694
90 Days | Acquired Loans | Commercial real estate, construction
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
90 Days | Acquired Loans | Commercial real estate, other
Loans
Financing Receivable, Recorded Investment, Past Due	233	312
90 Days | Acquired Loans | Commercial real estate
Loans
Financing Receivable, Recorded Investment, Past Due	233	312
90 Days | Acquired Loans | Commercial and industrial
Loans
Financing Receivable, Recorded Investment, Past Due	18	171
90 Days | Acquired Loans | Residential real estate
Loans
Financing Receivable, Recorded Investment, Past Due	1,885	1,910
90 Days | Acquired Loans | Home equity lines of credit
Loans
Financing Receivable, Recorded Investment, Past Due	534	301
90 Days | Acquired Loans | Consumer, indirect
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
90 Days | Acquired Loans | Consumer, direct
Loans
Financing Receivable, Recorded Investment, Past Due	0	0
90 Days | Acquired Loans | Consumer
Loans
Financing Receivable, Recorded Investment, Past Due	$ 0	$ 0

Loans Loans By Risk Category (D

Loans Loans By Risk Category (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Loans
Total Loans	$ 2,708,583	$ 2,338,344
Balance	2,728,778	2,357,137
Loan Type
Loans
Balance	2,728,778	2,357,137
Pass Rated | Loan Type
Loans
Balance	1,452,711	1,303,122
Special Mention | Loan Type
Loans
Balance	70,370	44,038
Substandard | Loan Type
Loans
Balance	43,176	46,164
Doubtful | Loan Type
Loans
Balance	642	216
Not Rated | Loan Type
Loans
Balance	1,161,879	963,597
Financial Asset Originated [Member] | Loan Type
Loans
Balance	2,156,030	1,942,290
Financial Asset Originated [Member] | Commercial real estate, construction
Loans
Balance	124,013	107,118
Financial Asset Originated [Member] | Commercial real estate, other
Loans
Balance	632,200	595,447
Financial Asset Originated [Member] | Commercial real estate
Loans
Balance	756,213	702,565
Financial Asset Originated [Member] | Commercial and industrial
Loans
Balance	530,207	438,051
Financial Asset Originated [Member] | Residential real estate
Loans
Balance	296,860	304,523
Financial Asset Originated [Member] | Home equity lines of credit
Loans
Balance	93,326	88,902
Financial Asset Originated [Member] | Consumer, indirect
Loans
Balance	407,167	340,390
Financial Asset Originated [Member] | Consumer, direct
Loans
Balance	71,674	67,010
Financial Asset Originated [Member] | Consumer
Loans
Balance	478,841	407,400
Financial Asset Originated [Member] | Deposit account overdrafts
Loans
Balance	583	849
Financial Asset Originated [Member] | Pass Rated | Loan Type
Loans
Balance	1,224,566	1,100,644
Financial Asset Originated [Member] | Pass Rated | Commercial real estate, construction
Loans
Balance	121,457	100,409
Financial Asset Originated [Member] | Pass Rated | Commercial real estate, other
Loans
Balance	612,099	561,320
Financial Asset Originated [Member] | Pass Rated | Commercial real estate
Loans
Balance	733,556	661,729
Financial Asset Originated [Member] | Pass Rated | Commercial and industrial
Loans
Balance	476,290	420,477
Financial Asset Originated [Member] | Pass Rated | Residential real estate
Loans
Balance	14,229	17,896
Financial Asset Originated [Member] | Pass Rated | Home equity lines of credit
Loans
Balance	453	454
Financial Asset Originated [Member] | Pass Rated | Consumer, indirect
Loans
Balance	8	55
Financial Asset Originated [Member] | Pass Rated | Consumer, direct
Loans
Balance	30	33
Financial Asset Originated [Member] | Pass Rated | Consumer
Loans
Balance	38	88
Financial Asset Originated [Member] | Pass Rated | Deposit account overdrafts
Loans
Balance	0	0
Financial Asset Originated [Member] | Special Mention | Loan Type
Loans
Balance	57,388	36,761
Financial Asset Originated [Member] | Special Mention | Commercial real estate, construction
Loans
Balance	0	5,502
Financial Asset Originated [Member] | Special Mention | Commercial real estate, other
Loans
Balance	10,898	17,189
Financial Asset Originated [Member] | Special Mention | Commercial real estate
Loans
Balance	10,898	22,691
Financial Asset Originated [Member] | Special Mention | Commercial and industrial
Loans
Balance	45,990	13,062
Financial Asset Originated [Member] | Special Mention | Residential real estate
Loans
Balance	500	1,000
Financial Asset Originated [Member] | Special Mention | Home equity lines of credit
Loans
Balance	0	0
Financial Asset Originated [Member] | Special Mention | Consumer, indirect
Loans
Balance	0	8
Financial Asset Originated [Member] | Special Mention | Consumer, direct
Loans
Balance	0	0
Financial Asset Originated [Member] | Special Mention | Consumer
Loans
Balance	0	8
Financial Asset Originated [Member] | Special Mention | Deposit account overdrafts
Loans
Balance	0	0
Financial Asset Originated [Member] | Substandard | Loan Type
Loans
Balance	30,338	33,575
Financial Asset Originated [Member] | Substandard | Commercial real estate, construction
Loans
Balance	1,472	754
Financial Asset Originated [Member] | Substandard | Commercial real estate, other
Loans
Balance	9,203	16,938
Financial Asset Originated [Member] | Substandard | Commercial real estate
Loans
Balance	10,675	17,692
Financial Asset Originated [Member] | Substandard | Commercial and industrial
Loans
Balance	7,692	4,512
Financial Asset Originated [Member] | Substandard | Residential real estate
Loans
Balance	11,971	11,371
Financial Asset Originated [Member] | Substandard | Home equity lines of credit
Loans
Balance	0	0
Financial Asset Originated [Member] | Substandard | Consumer, indirect
Loans
Balance	0	0
Financial Asset Originated [Member] | Substandard | Consumer, direct
Loans
Balance	0	0
Financial Asset Originated [Member] | Substandard | Consumer
Loans
Balance	0	0
Financial Asset Originated [Member] | Substandard | Deposit account overdrafts
Loans
Balance	0	0
Financial Asset Originated [Member] | Doubtful | Loan Type
Loans
Balance	409	216
Financial Asset Originated [Member] | Doubtful | Commercial real estate, construction
Loans
Balance	0	0
Financial Asset Originated [Member] | Doubtful | Commercial real estate, other
Loans
Balance	0	0
Financial Asset Originated [Member] | Doubtful | Commercial real estate
Loans
Balance	0	0
Financial Asset Originated [Member] | Doubtful | Commercial and industrial
Loans
Balance	0	0
Financial Asset Originated [Member] | Doubtful | Residential real estate
Loans
Balance	409	216
Financial Asset Originated [Member] | Doubtful | Home equity lines of credit
Loans
Balance	0	0
Financial Asset Originated [Member] | Doubtful | Consumer, indirect
Loans
Balance	0	0
Financial Asset Originated [Member] | Doubtful | Consumer, direct
Loans
Balance	0	0
Financial Asset Originated [Member] | Doubtful | Consumer
Loans
Balance	0	0
Financial Asset Originated [Member] | Doubtful | Deposit account overdrafts
Loans
Balance	0	0
Financial Asset Originated [Member] | Not Rated | Loan Type
Loans
Balance	843,329	771,094
Financial Asset Originated [Member] | Not Rated | Commercial real estate, construction
Loans
Balance	1,084	453
Financial Asset Originated [Member] | Not Rated | Commercial real estate, other
Loans
Balance	0	0
Financial Asset Originated [Member] | Not Rated | Commercial real estate
Loans
Balance	1,084	453
Financial Asset Originated [Member] | Not Rated | Commercial and industrial
Loans
Balance	235	0
Financial Asset Originated [Member] | Not Rated | Residential real estate
Loans
Balance	269,751	274,040
Financial Asset Originated [Member] | Not Rated | Home equity lines of credit
Loans
Balance	92,873	88,448
Financial Asset Originated [Member] | Not Rated | Consumer, indirect
Loans
Balance	407,159	340,327
Financial Asset Originated [Member] | Not Rated | Consumer, direct
Loans
Balance	71,644	66,977
Financial Asset Originated [Member] | Not Rated | Consumer
Loans
Balance	478,803	407,304
Financial Asset Originated [Member] | Not Rated | Deposit account overdrafts
Loans
Balance	583	849
Acquired Loans | Loan Type
Loans
Balance	572,748	414,847
Acquired Loans | Commercial real estate, construction
Loans
Balance	12,404	8,319
Acquired Loans | Commercial real estate, other
Loans
Balance	184,711	165,120
Acquired Loans | Commercial real estate
Loans
Balance	197,115	173,439
Acquired Loans | Commercial and industrial
Loans
Balance	35,537	34,493
Acquired Loans | Residential real estate
Loans
Balance	296,937	184,864
Acquired Loans | Home equity lines of credit
Loans
Balance	40,653	20,575
Acquired Loans | Consumer, indirect
Loans
Balance	136	329
Acquired Loans | Consumer, direct
Loans
Balance	2,370	1,147
Acquired Loans | Consumer
Loans
Balance	2,506	1,476
Acquired Loans | Pass Rated | Loan Type
Loans
Balance	228,145	202,478
Acquired Loans | Pass Rated | Commercial real estate, construction
Loans
Balance	8,976	8,267
Acquired Loans | Pass Rated | Commercial real estate, other
Loans
Balance	169,260	149,486
Acquired Loans | Pass Rated | Commercial real estate
Loans
Balance	178,236	157,753
Acquired Loans | Pass Rated | Commercial and industrial
Loans
Balance	32,471	32,011
Acquired Loans | Pass Rated | Residential real estate
Loans
Balance	17,370	12,543
Acquired Loans | Pass Rated | Home equity lines of credit
Loans
Balance	33	124
Acquired Loans | Pass Rated | Consumer, indirect
Loans
Balance	4	12
Acquired Loans | Pass Rated | Consumer, direct
Loans
Balance	31	35
Acquired Loans | Pass Rated | Consumer
Loans
Balance	35	47
Acquired Loans | Special Mention | Loan Type
Loans
Balance	12,982	7,277
Acquired Loans | Special Mention | Commercial real estate, construction
Loans
Balance	1,795	0
Acquired Loans | Special Mention | Commercial real estate, other
Loans
Balance	7,241	6,527
Acquired Loans | Special Mention | Commercial real estate
Loans
Balance	9,036	6,527
Acquired Loans | Special Mention | Commercial and industrial
Loans
Balance	2,008	157
Acquired Loans | Special Mention | Residential real estate
Loans
Balance	1,938	593
Acquired Loans | Special Mention | Home equity lines of credit
Loans
Balance	0	0
Acquired Loans | Special Mention | Consumer, indirect
Loans
Balance	0	0
Acquired Loans | Special Mention | Consumer, direct
Loans
Balance	0	0
Acquired Loans | Special Mention | Consumer
Loans
Balance	0	0
Acquired Loans | Substandard | Loan Type
Loans
Balance	12,838	12,589
Acquired Loans | Substandard | Commercial real estate, construction
Loans
Balance	1,633	52
Acquired Loans | Substandard | Commercial real estate, other
Loans
Balance	8,114	9,107
Acquired Loans | Substandard | Commercial real estate
Loans
Balance	9,747	9,159
Acquired Loans | Substandard | Commercial and industrial
Loans
Balance	1,058	2,325
Acquired Loans | Substandard | Residential real estate
Loans
Balance	2,033	1,105
Acquired Loans | Substandard | Home equity lines of credit
Loans
Balance	0	0
Acquired Loans | Substandard | Consumer, indirect
Loans
Balance	0	0
Acquired Loans | Substandard | Consumer, direct
Loans
Balance	0	0
Acquired Loans | Substandard | Consumer
Loans
Balance	0	0
Acquired Loans | Doubtful | Loan Type
Loans
Balance	233	0
Acquired Loans | Doubtful | Commercial real estate, construction
Loans
Balance	0	0
Acquired Loans | Doubtful | Commercial real estate, other
Loans
Balance	96	0
Acquired Loans | Doubtful | Commercial real estate
Loans
Balance	96	0
Acquired Loans | Doubtful | Commercial and industrial
Loans
Balance	0	0
Acquired Loans | Doubtful | Residential real estate
Loans
Balance	137	0
Acquired Loans | Doubtful | Home equity lines of credit
Loans
Balance	0	0
Acquired Loans | Doubtful | Consumer, indirect
Loans
Balance	0	0
Acquired Loans | Doubtful | Consumer, direct
Loans
Balance	0	0
Acquired Loans | Doubtful | Consumer
Loans
Balance	0	0
Acquired Loans | Not Rated | Loan Type
Loans
Balance	318,550	192,503
Acquired Loans | Not Rated | Commercial real estate, construction
Loans
Balance	0	0
Acquired Loans | Not Rated | Commercial real estate, other
Loans
Balance	0	0
Acquired Loans | Not Rated | Commercial real estate
Loans
Balance	0	0
Acquired Loans | Not Rated | Commercial and industrial
Loans
Balance	0	0
Acquired Loans | Not Rated | Residential real estate
Loans
Balance	275,459	170,623
Acquired Loans | Not Rated | Home equity lines of credit
Loans
Balance	40,620	20,451
Acquired Loans | Not Rated | Consumer, indirect
Loans
Balance	132	317
Acquired Loans | Not Rated | Consumer, direct
Loans
Balance	2,339	1,112
Acquired Loans | Not Rated | Consumer
Loans
Balance	$ 2,471	$ 1,429

Loans Schedule Of Impaired Loan

Loans Schedule Of Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Loan Type
Impaired Loans
Unpaid Principal Balance	$ 50,001	$ 44,230
Recorded Investment With Allowance	2,154	1,649
Recorded Investment Without Allowance	46,221	39,416
Total Recorded Investment	48,375	41,065
Related Allowance	509	339
Average Recorded Investment	43,140	41,811
Interest Income Recognized	1,879	1,926
Commercial real estate, construction
Impaired Loans
Unpaid Principal Balance	2,376	821
Recorded Investment With Allowance	0	0
Recorded Investment Without Allowance	2,376	754
Total Recorded Investment	2,376	754
Related Allowance	0	0
Average Recorded Investment	1,732	788
Interest Income Recognized	74	0
Commercial real estate, other
Impaired Loans
Unpaid Principal Balance	15,464	14,909
Recorded Investment With Allowance	274	14
Recorded Investment Without Allowance	14,946	13,606
Total Recorded Investment	15,220	13,620
Related Allowance	119	1
Average Recorded Investment	14,043	14,392
Interest Income Recognized	455	503
Commercial real estate
Impaired Loans
Unpaid Principal Balance	17,840	15,730
Recorded Investment With Allowance	274	14
Recorded Investment Without Allowance	17,322	14,360
Total Recorded Investment	17,596	14,374
Related Allowance	119	1
Average Recorded Investment	15,775	15,180
Interest Income Recognized	529	503
Commercial and industrial
Impaired Loans
Unpaid Principal Balance	3,305	1,690
Recorded Investment With Allowance	790	951
Recorded Investment Without Allowance	2,436	572
Total Recorded Investment	3,226	1,523
Related Allowance	157	199
Average Recorded Investment	2,423	1,668
Interest Income Recognized	72	65
Residential real estate
Impaired Loans
Unpaid Principal Balance	25,990	24,743
Recorded Investment With Allowance	644	477
Recorded Investment Without Allowance	24,034	22,626
Total Recorded Investment	24,678	23,103
Related Allowance	154	58
Average Recorded Investment	22,769	23,195
Interest Income Recognized	1,134	1,246
Home equity lines of credit
Impaired Loans
Unpaid Principal Balance	2,291	1,707
Recorded Investment With Allowance	424	81
Recorded Investment Without Allowance	1,869	1,624
Total Recorded Investment	2,293	1,705
Related Allowance	73	18
Average Recorded Investment	1,832	1,505
Interest Income Recognized	109	85
Consumer, indirect
Impaired Loans
Unpaid Principal Balance	496	273
Recorded Investment With Allowance	0	70
Recorded Investment Without Allowance	503	206
Total Recorded Investment	503	276
Related Allowance	0	26
Average Recorded Investment	278	184
Interest Income Recognized	15	20
Consumer, direct
Impaired Loans
Unpaid Principal Balance	79	87
Recorded Investment With Allowance	22	56
Recorded Investment Without Allowance	57	28
Total Recorded Investment	79	84
Related Allowance	6	37
Average Recorded Investment	63	79
Interest Income Recognized	20	7
Consumer
Impaired Loans
Unpaid Principal Balance	575	360
Recorded Investment With Allowance	22	126
Recorded Investment Without Allowance	560	234
Total Recorded Investment	582	360
Related Allowance	6	63
Average Recorded Investment	341	263
Interest Income Recognized	$ 35	$ 27

Loans Troubled Debt Restructuri

Loans Troubled Debt Restructurings (Details)	12 Months Ended
	Dec. 31, 2018USD ($)contract	Dec. 31, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Additional commitments to lend funds to debtors whose terms have been modified in a TDR	$ 0
Financial Asset Originated [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	50	35
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 2,801,000	$ 1,231,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,801,000	1,231,000
Total Recorded Investment	$ 2,714,000	$ 1,134,000
Number of contracts modified as a TDR that subsequently defaulted | contract	2	0
Recorded investment in loans modified as a TDR that subsequently defaulted	$ 88,000	$ 0
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0	0
Financial Asset Originated [Member] | Commercial real estate, other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 14,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		14,000
Total Recorded Investment		$ 14,000
Financial Asset Originated [Member] | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	1	4
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 714,000	$ 210,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	714,000	210,000
Total Recorded Investment	$ 714,000	$ 149,000
Financial Asset Originated [Member] | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	9	7
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 904,000	$ 483,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	904,000	483,000
Total Recorded Investment	$ 899,000	$ 473,000
Number of contracts modified as a TDR that subsequently defaulted | contract	1	0
Recorded investment in loans modified as a TDR that subsequently defaulted	$ 56,000	$ 0
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0	0
Financial Asset Originated [Member] | Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	8	6
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 666,000	$ 296,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	666,000	296,000
Total Recorded Investment	$ 660,000	$ 289,000
Number of contracts modified as a TDR that subsequently defaulted | contract	1	0
Recorded investment in loans modified as a TDR that subsequently defaulted	$ 32,000	$ 0
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0	0
Financial Asset Originated [Member] | Consumer, indirect
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	27	15
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 485,000	$ 218,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	485,000	218,000
Total Recorded Investment	$ 412,000	$ 201,000
Financial Asset Originated [Member] | Consumer, direct
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	5	2
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 32,000	$ 10,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	32,000	10,000
Total Recorded Investment	$ 29,000	$ 8,000
Financial Asset Originated [Member] | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	32	17
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 517,000	$ 228,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	517,000	228,000
Total Recorded Investment	$ 441,000	$ 209,000
Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR | contract	22	18
Pre-modification recorded investment in loans modified as TDR	$ 1,504,000	$ 1,060,000
Post-modification recorded investment in loans modified as TDR	1,504,000	1,060,000
Total Recorded Investment	$ 1,464,000	$ 1,012,000
Number of contracts modified as a TDR that subsequently defaulted | contract	1	2
Recorded investment in loans modified as a TDR that subsequently defaulted	$ 10,000	$ 64,000
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0	0
Acquired Loans | Commercial real estate, construction
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	1	3
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 50,000	$ 288,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	50,000	288,000
Total Recorded Investment	$ 45,000	$ 280,000
Acquired Loans | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	15	9
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,258,000	$ 442,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,258,000	442,000
Total Recorded Investment	$ 1,226,000	$ 412,000
Number of contracts modified as a TDR that subsequently defaulted | contract	0	2
Recorded investment in loans modified as a TDR that subsequently defaulted	$ 0	$ 64,000
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0	0
Acquired Loans | Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	6	5
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 196,000	$ 328,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	196,000	328,000
Total Recorded Investment	$ 193,000	$ 320,000
Number of contracts modified as a TDR that subsequently defaulted | contract	1
Recorded investment in loans modified as a TDR that subsequently defaulted	$ 10,000
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0
Acquired Loans | Consumer, direct
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 2,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		2,000
Total Recorded Investment		$ 0

Loans Allowance For Loan Losses

Loans Allowance For Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for loan losses	$ 5,448	$ 3,772	$ 3,539
Period-end amount allocated to:
Percentage Growth in Loans and Leases Receivable, Net of Deferred Income	16.00%
Growth in Loans and Leases Receivable, Net of Deferred Income	$ 371,600
Financial Asset Acquired and No Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	0
Ending balance	0			$ 383	$ 0
Period-end amount allocated to:
Ending balance	0			383	0
Provision for (recovery of) loan losses	383
Loan Type
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	18,685	18,196
Charge-offs	(5,187)	(4,871)
Recoveries	1,143	1,470
Allowance for Loan and Lease Losses Write-offs, Net	(4,044)	(3,401)
Provision for loan losses	5,018	3,890
Ending balance	18,685	18,196	18,196	19,659	18,685
Period-end amount allocated to:
Loans individually evaluated for impairment				509	339
Loans collectively evaluated for impairment				19,150	18,346
Ending balance	18,685	18,196	18,196	19,659	18,685
Commercial real estate, other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	7,797	7,172
Charge-offs	(849)	(408)
Recoveries	60	146
Allowance for Loan and Lease Losses Write-offs, Net	(789)	(262)
Provision for loan losses	995	887
Ending balance	7,797	7,172	7,172	8,003	7,797
Period-end amount allocated to:
Loans individually evaluated for impairment				119	1
Loans collectively evaluated for impairment				7,884	7,796
Ending balance	7,797	7,172	7,172	8,003	7,797
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	5,813	6,353
Charge-offs	(38)	(175)
Recoveries	18	1
Allowance for Loan and Lease Losses Write-offs, Net	(20)	(174)
Provision for loan losses	385	(366)
Ending balance	5,813	6,353	6,353	6,178	5,813
Period-end amount allocated to:
Loans individually evaluated for impairment				157	199
Loans collectively evaluated for impairment				6,021	5,614
Ending balance	$ 5,813	6,353	6,353	6,178	5,813
Percentage Growth in Loans and Leases Receivable, Net of Deferred Income	13.00%
Growth in Loans and Leases Receivable, Net of Deferred Income	$ 170,500
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	904	982
Charge-offs	(355)	(637)
Recoveries	232	152
Allowance for Loan and Lease Losses Write-offs, Net	(123)	(485)
Provision for loan losses	433	407
Ending balance	904	982	982	1,214	904
Period-end amount allocated to:
Loans individually evaluated for impairment				154	58
Loans collectively evaluated for impairment				1,060	846
Ending balance	904	982	982	1,214	904
Home equity lines of credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	693	688
Charge-offs	(107)	(131)
Recoveries	14	13
Allowance for Loan and Lease Losses Write-offs, Net	(93)	(118)
Provision for loan losses	18	123
Ending balance	693	688	688	618	693
Period-end amount allocated to:
Loans individually evaluated for impairment				73	18
Loans collectively evaluated for impairment				545	675
Ending balance	693	688	688	618	693
Consumer, indirect
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	2,944	2,312
Charge-offs	(2,515)	(2,110)
Recoveries	474	764
Allowance for Loan and Lease Losses Write-offs, Net	(2,041)	(1,346)
Provision for loan losses	2,311	1,978
Ending balance	2,944	2,312	2,312	3,214	2,944
Period-end amount allocated to:
Loans individually evaluated for impairment				0	26
Loans collectively evaluated for impairment				3,214	2,918
Ending balance	$ 2,944	2,312	2,312	3,214	2,944
Percentage Growth in Loans and Leases Receivable, Net of Deferred Income	20.00%
Growth in Loans and Leases Receivable, Net of Deferred Income	$ 66,600
Consumer, direct
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	464	518
Charge-offs	(358)	(372)
Recoveries	140	179
Allowance for Loan and Lease Losses Write-offs, Net	(218)	(193)
Provision for loan losses	105	139
Ending balance	464	518	518	351	464
Period-end amount allocated to:
Loans individually evaluated for impairment				6	37
Loans collectively evaluated for impairment				345	427
Ending balance	464	518	518	351	464
Deposit account overdrafts
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	70	171
Charge-offs	(965)	(1,038)
Recoveries	205	215
Allowance for Loan and Lease Losses Write-offs, Net	(760)	(823)
Provision for loan losses	771	722
Ending balance	70	171	171	81	70
Period-end amount allocated to:
Loans individually evaluated for impairment				0	0
Loans collectively evaluated for impairment				81	70
Ending balance	70	171	171	81	70
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	108	233
Ending balance	108	233	233	153	108
Period-end amount allocated to:
Ending balance	108	233	$ 233	$ 153	$ 108
Provision for (recovery of) loan losses	47	(118)
Acquired Purchased Credit Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Charge-offs	$ (2)	$ (7)

Loans Allowance for Loan Loss_2

Loans Allowance for Loan Losses Acquired Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan and Lease Losses, Loans Acquired	$ 0
Financial Asset Acquired and No Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	0
Provision for (recovery of) loan losses	383,000
Ending balance	383,000	$ 0
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	108,000	233,000
Provision for (recovery of) loan losses	47,000	(118,000)
Ending balance	153,000	108,000
Acquired Purchased Credit Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Charge-offs	$ 2,000	$ 7,000

Bank Premises and Equipment Dep

Bank Premises and Equipment Depreciation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Bank Premises and Equipment
Depreciation expense		$ 4.9	$ 5.1
Building and premises | Minimum
Bank Premises and Equipment
Building and premises and furniture, fixtures and equipment	5
Building and premises | Maximum
Bank Premises and Equipment
Building and premises and furniture, fixtures and equipment	40
Furniture, fixtures and equipment | Minimum
Bank Premises and Equipment
Building and premises and furniture, fixtures and equipment	2
Furniture, fixtures and equipment | Maximum
Bank Premises and Equipment
Building and premises and furniture, fixtures and equipment	10

Bank Premises and Equipment Lea

Bank Premises and Equipment Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Operating Leases, Rent Expense	$ 1.2	$ 1.1

Bank Premises and Equipment Net

Bank Premises and Equipment Net Book Value (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Bank Premises and Equipment
Total bank premises and equipment	$ 110,544	$ 101,737
Accumulated depreciation	(54,002)	(49,227)
Bank premises and equipment, net	56,542	52,510
Land
Bank Premises and Equipment
Total bank premises and equipment	13,776	12,871
Building and premises
Bank Premises and Equipment
Total bank premises and equipment	68,245	61,729
Furniture, fixtures and equipment
Bank Premises and Equipment
Total bank premises and equipment	$ 28,523	$ 27,137

Bank Premises and Equipment Fut

Bank Premises and Equipment Future Lease Payments (Details) $ in Thousands	Dec. 31, 2018USD ($)
Property, Plant and Equipment [Abstract]
2,019	$ 975
2,020	756
2,021	606
2,022	455
2,023	295
Thereafter	223
Total future operating lease payments	$ 3,310

Bank Premises and Equipment L_2

Bank Premises and Equipment Lease (Details)	Dec. 31, 2018
Minimum
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Term of Contract	2 years
Maximum
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Term of Contract	10 years

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($)	Oct. 02, 2017	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Intangibles recorded from acquisitions		$ 2,600,000	$ 1,593,000
Goodwill, Impairment Loss		0
Goodwill
Goodwill, beginning of year		133,111,000	132,631,000
Goodwill recorded from acquisitions			480,000
Goodwill, end of year		151,245,000	$ 133,111,000
ASB Financial Corp.
Goodwill [Line Items]
Other intangible assets		2,639,000
Goodwill
Goodwill, end of year		$ 18,134,000
Property and casualty focused insurance agency
Goodwill
Goodwill recorded from acquisitions	$ 480,000

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Other Intangibles) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Intangible Assets
Gross intangibles	$ 23,116	$ 21,523
Intangibles recorded from acquisitions	2,600	1,593
Accumulated amortization	(17,294)	(13,956)
Total acquisition-related intangibles	8,185	9,160
Other intangible assets	10,840	11,465
Core Deposits
Other Intangible Assets
Gross intangibles	15,636	16,150
Intangibles recorded from acquisitions	2,363	0
Accumulated amortization	(12,540)	(10,281)
Total acquisition-related intangibles	5,459	5,869
Customer Relationships
Other Intangible Assets
Gross intangibles	7,480	5,373
Intangibles recorded from acquisitions	0	1,593
Accumulated amortization	(4,754)	(3,675)
Total acquisition-related intangibles	2,726	3,291
Servicing rights
Other Intangible Assets
Total acquisition-related intangibles	2,655	2,305	$ 2,305	$ 2,387
Other intangible assets	$ 2,655	$ 2,305

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Estimated Aggregated Future Amortization Expense) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Intangible Assets
2,019	$ 2,778
2,020	2,067
2,021	1,381
2,022	755
2,023	453
Thereafter	751
Total acquisition-related intangibles	8,185	$ 9,160
Core Deposits
Other Intangible Assets
2,019	1,999
2,020	1,438
2,021	911
2,022	437
2,023	236
Thereafter	438
Total acquisition-related intangibles	5,459	5,869
Customer Relationships
Other Intangible Assets
2,019	779
2,020	629
2,021	470
2,022	318
2,023	217
Thereafter	313
Total acquisition-related intangibles	2,726	3,291
Servicing rights
Other Intangible Assets
Total acquisition-related intangibles	$ 2,655	$ 2,305	$ 2,305	$ 2,387

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets (Mortgage Servicing Rights Activity) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Intangible Assets
Balance, beginning of year	$ 9,160,000
Balance, end of year	8,185,000	$ 9,160,000
Valuation allowance for servicing rights	0
Servicing rights
Other Intangible Assets
Balance, beginning of year	2,305,000	2,305,000	$ 2,387,000
Amortization	1,623,000	741,000	762,000
Servicing rights originated	1,697,000	741,000	680,000
Servicing rights acquired	276,000	0	0
Balance, end of year	2,655,000	2,305,000	$ 2,305,000
Portion at Fair Value Measurement [Member]
Other Intangible Assets
Servicing rights (c)	$ 4,568,000	$ 3,866,000
Minimum
Other Intangible Assets
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate	10.50%	9.30%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed	8.70%	8.90%
Maximum
Other Intangible Assets
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate	13.00%	11.80%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed	11.60%	22.60%

Deposits (Deposits) (Details)

Deposits (Deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deposit Type
Total	$ 658,189
Savings accounts	573,702	$ 593,415
Interest-bearing deposit accounts	468,500	446,714
Money market deposit accounts	379,878	371,376
Governmental deposit accounts	267,319	264,524
Total interest-bearing deposits	2,347,588	2,174,320
Non-interest-bearing	607,877	556,010
Total deposits	2,955,465	2,730,330
Related Party Deposits	11,300	12,000
Brokered CD's
Deposit Type
Total	263,854	159,618
Retail CD's
Deposit Type
Retail CD's $100,000 or More	182,717	149,105
Retail CD's Less than $100,000	211,618	189,568
Total	$ 394,335	$ 338,673

Deposits (Schedule of Maturitie

Deposits (Schedule of Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deposit Type
2,019	$ 432,270
2,020	102,746
2,021	74,939
2,022	23,349
2,023	23,694
Thereafter	1,191
Total	658,189
Brokered CD's
Deposit Type
2,019	235,421
2,020	18,330
2,021	5,540
2,022	4,081
2,023	482
Thereafter	0
Total	263,854	$ 159,618
Retail CD's
Deposit Type
2,019	196,849
2,020	84,416
2,021	69,399
2,022	19,268
2,023	23,212
Thereafter	1,191
Total	$ 394,335	$ 338,673

Short-Term Borrowings (Narrativ

Short-Term Borrowings (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Short-term Borrowings
Federal Funds Available from Correspondent Banks	$ 107,900
Short-term borrowings	356,198	$ 209,491
FHLB Advances
Short-term Borrowings
Long-term borrowings reclassified to short-term based on maturity date	30,000	50,600
Short-term borrowings	305,000	92,592	$ 231,000
FHLB Advances | Matured Debt [Member]
Short-term Borrowings
Long-term borrowings reclassified to short-term based on maturity date	40,000	20,000
National Market Repurchase Agreements
Short-term Borrowings
Long-term borrowings reclassified to short-term based on maturity date		40,000
Short-term borrowings	$ 0	$ 40,000

Short-Term Borrowings (Short Te

Short-Term Borrowings (Short Term Borrowing) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Short-term Borrowings
Short-term borrowings	$ (356,198)	$ (209,491)
Interest on short-term borrowings	5,238	1,534	$ 508
Retail Repurchase Agreements
Short-term Borrowings
Short-term borrowings	(51,202)	(76,899)	(74,607)
Average balance	64,519	75,344	72,886
Highest month-end balance	72,822	80,649	81,353
Interest on short-term borrowings	$ 194	$ 128	$ 124
Weighted Average Interest Rate, End of Year	0.48%	0.17%	0.17%
Weighted Average Interest Rate, During the Year	0.30%	0.17%	0.17%
FHLB Advances
Short-term Borrowings
Short-term borrowings	$ (305,000)	$ (92,592)	$ (231,000)
Average balance	219,897	100,205	86,260
Highest month-end balance	307,561	208,000	231,000
Interest on short-term borrowings	$ 4,494	$ 1,160	$ 384
Weighted Average Interest Rate, End of Year	2.32%	1.91%	0.64%
Weighted Average Interest Rate, During the Year	2.04%	1.16%	0.45%
National Market Repurchase Agreements
Short-term Borrowings
Short-term borrowings	$ 0	$ (40,000)
Average balance	14,329	6,685
Highest month-end balance	30,000	40,000
Interest on short-term borrowings	$ 527	$ 246
Weighted Average Interest Rate, End of Year	0.00%	3.68%
Weighted Average Interest Rate, During the Year	3.68%	3.68%
Other
Short-term Borrowings
Short-term borrowings	$ (4)	$ 0	$ 0
Average balance	301	13	23
Highest month-end balance	1,553	0	0
Interest on short-term borrowings	$ 23	$ 0	$ 0
Weighted Average Interest Rate, End of Year	0.00%	0.00%	0.00%
Weighted Average Interest Rate, During the Year		1.30%	1.11%

Long-Term Borrowings (Narrative

Long-Term Borrowings (Narrative) (Details)	Mar. 06, 2015USD ($)semi_annual_period	Dec. 31, 2018USD ($)contract	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2018USD ($)
Long-term borrowings
Junior subordinated debt securities		$ 7,283,000	$ 7,107,000
Debt Instrument, Interest Rate, Stated Percentage		0.00%	0.00%
Long-term borrowings		$ 109,644,000	$ 144,019,000
Long-term Federal Home Loan Bank Advances, Current		30,000,000	50,600,000
Revolving Line of Credit				$ 15,000,000
Line of Credit Facility, Commitment Fee Amount				$ 70,600
Line of Credit Facility, Commitment Fee Percentage				0.47%
Maximum aggregate indebtedness under debt covenants		10,000,000
Maximum material transaction amount under debt covenant		$ 10,000,000
Total Risk-Based Capital Ratio Minimum Under Debt Covenant		12.50%
Nonperforming Assets to Tangible Capital plus Allowance for Loan Losses Maximum Under Debt Covenant		20.00%
Allowance for Loan Losses to Nonperforming Loans Minimum Under Debt Covenant		70.00%
Fixed charge coverage ratio minimum required by debt covenant		125.00%
Net loss on other transactions		$ (13,000)	0	$ (707,000)
Interest rate on capital securities	1.50%
Minimum
Long-term borrowings
Repurchase agreements, maturities period		5 years
Repurchase agreements, call option features at buyer discretion, initial call period		3 months
Maximum
Long-term borrowings
Repurchase agreements, maturities period		10 years
Repurchase agreements, call option features at buyer discretion, initial call period		5 years
Distributions on Capital Securities, Deferred, Number of Consecutive Semiannual Periods | semi_annual_period	20
FHLB putable, non-amortizing, fixed rate advances
Long-term borrowings
Long-term Federal Home Loan Bank Advances		$ 85,000,000	$ 115,000,000
FHLB putable, non-amortizing, fixed rate advances | Minimum
Long-term borrowings
FHLB advances, maturities period		1 year
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate		1.26%	1.20%
FHLB putable, non-amortizing, fixed rate advances | Maximum
Long-term borrowings
FHLB advances, maturities period		9 years
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate		2.17%	2.03%
Current year advances [Member]
Long-term borrowings
Long-term Federal Home Loan Bank Advances		$ 50,000,000	$ 75,000,000
FHLB amortizing, fixed rate advances | Minimum
Long-term borrowings
FHLB advances,fixed rate intial period		3 months
Junior subordinated debt securities
Long-term borrowings
Long-term Federal Home Loan Bank Advances		$ 17,361,000	21,939,000
Junior subordinated debt securities | Minimum
Long-term borrowings
FHLB advances, maturities period		1 year
Junior subordinated debt securities | Maximum
Long-term borrowings
FHLB advances, maturities period		13 years
Matured in 2018 [Member]
Long-term borrowings
Long-term Federal Home Loan Bank Advances		$ 60,000,000
NB&T Financial Group, Inc.
Long-term borrowings
Junior subordinated debt securities	$ 6,600,000
Interest Rate Swap
Long-term borrowings
Long-term borrowings			20,000,000
Derivative, Number of Instruments Held | contract		12
Notional amounts		$ 110,000,000	60,000,000		$ 50,000,000
Interest Rate Swap | Minimum
Long-term borrowings
Derivative, Fixed Interest Rate					2.92%
Interest Rate Swap | Maximum
Long-term borrowings
Derivative, Fixed Interest Rate					3.00%
National Market Repurchase Agreements
Long-term borrowings
Long-term borrowings reclassified to short-term based on maturity date			40,000,000
FHLB Advances
Long-term borrowings
Long-term borrowings reclassified to short-term based on maturity date		$ 30,000,000	$ 50,600,000

Long-Term Borrowings (Long Term

Long-Term Borrowings (Long Term Borrowing) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Long-term borrowings
Fixed charge coverage ratio minimum required by debt covenant	125.00%
Long-term borrowings:
Junior subordinated debt securities	$ 7,283	$ 7,107
Unamortized debt issuance cost	0	(27)
Long-term borrowings	$ 109,644	$ 144,019
Debt Instrument, Interest Rate, Stated Percentage	0.00%	0.00%
Total long-term borrowings, Weighted-Average Rate	2.44%	2.04%
FHLB putable non-amortizing, fixed rate advances
Long-term borrowings:
Long-term Federal Home Loan Bank Advances	$ 85,000	$ 115,000
Federal Home Loan Bank, Advances, Weighted Average Interest Rate	2.05%	1.86%
Junior subordinated debt securities
Long-term borrowings:
Long-term Federal Home Loan Bank Advances	$ 17,361	$ 21,939
Federal Home Loan Bank, Advances, Weighted Average Interest Rate	2.09%	2.02%
Junior Subordinated Debt [Member]
Long-term borrowings:
Debt, Weighted Average Interest Rate	7.83%	4.97%
Maximum | FHLB putable non-amortizing, fixed rate advances
Long-term borrowings
FHLB advances, maturities period	9 years
Maximum | Junior subordinated debt securities
Long-term borrowings
FHLB advances, maturities period	13 years
Minimum | FHLB putable non-amortizing, fixed rate advances
Long-term borrowings
FHLB advances, maturities period	1 year
Minimum | Junior subordinated debt securities
Long-term borrowings
FHLB advances, maturities period	1 year

Long-Term Borrowings (Minimum A

Long-Term Borrowings (Minimum Annual Retirements of Long-Term Borrowings) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Aggregate minimum annual retirements of long-term borrowings in future periods:
2,019	$ 3,512
2,020	25,564
2,021	21,979
2,022	16,521
2,023	1,157
Thereafter	40,911
Long-term borrowings	$ 109,644	$ 144,019
Weighted average interest rate, 2019 retirements	1.53%
Weighted average interest rate, 2020 retirements	1.83%
Weighted average interest rate, 2021 retirements	1.73%
Weighted average interest rate, 2022 retirements	1.95%
Weighted average interest rate, 2023 retirements	1.01%
Weighted average interest rate, thereafter	3.51%
Total long-term borrowings, Weighted-Average Rate	2.44%	2.04%

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017
Class of Stock
Issuance of common shares related to acquisition of NB&T Financial Group, Inc.	$ 40,898
Stock Repurchase Program, Authorized Amount	$ 20,000
Purchase of treasury stock	0	279,770	0
Purchase of treasury stock	$ 5,000
Preferred stock, shares authorized	50,000			50,000
Preferred stock, shares issued	0			0

Stockholders' Equity (Stock Rol

Stockholders' Equity (Stock Rollforward) (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Increase (Decrease) in Stock by Class
Common stock, shares issued, beginning of period	18,952,385
Treasury stock, shares, beginning of period	702,449
Changes related to deferred compensation plan:
Purchase of treasury stock	0		279,770	0
Changes related to stock issued in acquisitions:
Common stock, shares issued, end of period	20,124,378	18,952,385
Treasury stock, shares, end of period	601,289	702,449
Common Stock
Increase (Decrease) in Stock by Class
Common stock, shares issued, beginning of period	18,952,385	18,939,091	18,931,200
Changes related to stock-based compensation awards:
Stock Issued During Period, Shares, Restricted Stock Award, Gross		0	0
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited	0	3,554	11,820
Stock Issued During Period, Shares, Share-based Compensation, Gross		0	0
Changes related to dividend reinvestment plan:
Common shares issued under dividend reinvestment plan	19,282	16,848	19,711
Changes related to stock issued in acquisitions:
Common stock, shares issued, end of period	20,124,378	18,952,385	18,939,091	18,931,200
Treasury Stock
Increase (Decrease) in Stock by Class
Treasury stock, shares, beginning of period	702,449	795,758	586,686
Changes related to stock-based compensation awards:
Stock Issued During Period, Shares, Restricted Stock Award, Gross	(106,805)	(68,707)	(56,000)
Release of restricted common shares	32,082	10,452	17,220
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited	2,011	5,050	1,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(102)	(266)	(1,775)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	(16,544)	(300)
Stock Issued During Period, Shares, Share-based Compensation, Gross			(350)
Changes related to deferred compensation plan:
Purchase of treasury stock	6,526	5,413	8,396
Proceeds from Sale of Treasury Stock	(10)
Reissuance of treasury stock	(2,089)	(24,634)	(12,012)
Stock Repurchased During Period, Shares			279,770
Changes related to Board Compensation:
Common shares issued under compensation plan for Board of Directors	(4,699)	(9,092)	(11,450)
Stock Issued During Period, Shares, Employee Stock Purchase Plans	(11,530)	(11,225)	(15,727)
Changes related to stock issued in acquisitions:
Treasury stock, shares, end of period	601,289	702,449	795,758	586,686
ASB Financial Corp. | Common Stock
Changes related to stock issued in acquisitions:
Stock Issued During Period, Shares, Acquisitions	1,152,711

Stockholders' Equity (Accumulat

Stockholders' Equity (Accumulated Other Comprehensive (Loss) Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stockholders' Equity Attributable to Parent [Abstract]
Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2016-01	$ (5,020)
Accumulated Other Comprehensive (Loss) Income
Unrealized Gain (Loss) on Securities	(2,088)	$ 581	$ 2,869
Unrecognized Net Pension and Postretirement Costs	(4,256)	(3,321)	(3,228)
Unrealized Gain (Loss) on Cash Flow Hedge	1,129	1,186	0
Accumulated Other Comprehensive (Loss) Income	(5,215)	(1,554)	(359)
Realized gain on sale of securities, net of tax	115	(1,939)	(604)
Other Comprehensive Income (Loss), Reclassification Adjustment in Net Income, Net of Tax		(1,939)	(604)
Realized loss due to settlement and curtailment, net of tax	211	157
Realized loss due to settlement and curtailment, net of tax	211	157
Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2018-02	0	(370)	0
Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2018-02	0	(754)	0
Amounts reclassified out of accumulated other comprehensive (loss) income per ASU 2018-02	0	200	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(5,020)	924
Other comprehensive (loss) income, net of reclassifications and tax	(3,089)	(360)	(1,684)
Other comprehensive (loss) income, net of reclassifications and tax	334	(338)	(93)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(269)	(257)	1,186
Other comprehensive (loss) income, net of reclassifications and tax	(3,024)	(955)	(591)
Unrealized Gain (Loss) on Securities	(10,082)	(2,088)	581
Unrecognized Net Pension and Postretirement Costs	(3,711)	(4,256)	(3,321)
Unrealized Gain (Loss) on Cash Flow Hedge	860	1,129	1,186
Accumulated Other Comprehensive (Loss) Income	$ (12,933)	$ (5,215)	$ (1,554)

Stockholders' Equity Dividends

Stockholders' Equity Dividends (Details) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Dividends [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 0.30	$ 0.28	$ 0.28	$ 0.26	$ 0.22	$ 0.22	$ 0.20	$ 0.20	$ 1.12	$ 0.84

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure
Defined Benefit Plan, Assumed Health Care Cost Trend Rate, Description	0.055
Pension benefits to be amortized from accumulated other comprehensive income (loss) into net periodic cost over the next fiscal year	$ 78,000
Ultimate Health Care Cost Trend Rate	4.00%
Cash and Cash Equivalents	$ 77,612,000	$ 72,194,000	$ 66,146,000	$ 71,115,000
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1,700,000	1,500,000	1,500,000
Components of net periodic benefit costs:
Time Period of Lower Returns on Equity Securites	10 years
Pension benefits
Defined Benefit Plan Disclosure
Cash and Cash Equivalents	$ 680,000	113,000
Accrued Investment Income Receivable	58,000	1,000
Components of net periodic benefit costs:
Interest cost	423,000	451,000	438,000
Expected return on plan assets	(640,000)	(553,000)	(492,000)
Defined Benefit Plan, Amortization of Gain (Loss)	(104,000)	(102,000)	(95,000)
Settlement of benefit obligation	267,000	242,000	0
Net periodic cost (benefit)	$ 154,000	$ 242,000	$ 41,000
Discount rate	3.55%	3.80%	3.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.50%	7.50%	7.50%
Postretirement benefits
Components of net periodic benefit costs:
Interest cost	$ 3,000	$ 3,000	$ 4,000
Expected return on plan assets	0	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	5,000	6,000	6,000
Settlement of benefit obligation	0	0	0
Net periodic cost (benefit)	$ (2,000)	$ (3,000)	$ (2,000)
Discount rate	3.40%	3.80%	3.90%
Postretirement benefits | Employees hired before January 1, 2003
Defined Benefit Plan Disclosure
Contribution per eligible employee, coverage basis, consecutive period of highest average monthly compensation	5 years
Contribution per eligible employee, coverage basis, lastest service period	10 years
Postretirement benefits | Employees hired on or after January 1, 2003
Defined Benefit Plan Disclosure
Percentage of annual contribution per eligible employee	2.00%
Postretirement Health Coverage [Member] | Employees retired before January 1, 1993
Defined Benefit Plan Disclosure
Maximum coverage per eligible retiree	100.00%
Minimum
Defined Benefit Plan Disclosure
Defined Contribution Plan, Employer Matching Contribution, Percent	0.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	3.00%
Components of net periodic benefit costs:
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 10,000
Minimum | Equity investment securities (a)
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	60.00%
Minimum | Investment securities
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	2000.00%
Minimum | Other Investments [Member]
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	0.00%
Maximum
Defined Benefit Plan Disclosure
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	5.00%
Components of net periodic benefit costs:
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 15,000
Maximum | Equity investment securities (a)
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	75.00%
Maximum | Investment securities
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	40.00%
Maximum | Other Investments [Member]
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	0.00%

Employee Benefit Plans (Changes

Employee Benefit Plans (Changes in Benefit Obligation, Fair Value of Assets and Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in plan assets:
Beginning balance	$ 8,379
Ending balance	9,496	$ 8,379
Amounts recognized in Accumulated Other Comprehensive Loss:
Total	3,711	4,256	$ 3,321	$ 3,228
Pension benefits
Change in benefit obligation:
Beginning balance	12,991	12,127
Interest cost	423	451	438
Plan participants’ contributions	0	0
Actuarial (gain) loss	(1,519)	1,207
Benefit payments	197	189
Settlements	(703)	(605)
Ending balance	10,995	12,991	12,127
Change in plan assets:
Beginning balance	8,493	7,582
Actual (loss) return on plan assets	(554)	1,140
Employer contributions	3,195	565
Benefit payments	(197)	(189)
Settlements	(703)	(605)
Ending balance	10,234	8,493	7,582
Funded status at December 31	(761)	(4,498)
Amounts recognized in Consolidated Balance Sheets:
Accrued benefit liability	(761)	(4,498)
Net amount recognized	(761)	(4,498)
Amounts recognized in Accumulated Other Comprehensive Loss:
Unrecognized prior service cost	0	0
Unrecognized net loss (gain)	3,761	4,311
Total	$ 3,761	$ 4,311
Discount Rate	3.55%	3.40%
Defined Benefit Plan, Accumulated Benefit Obligation	$ 10,995	$ 12,991
Other Postretirement Benefit Plans, Defined Benefit [Member]
Change in benefit obligation:
Beginning balance	91	103
Interest cost	3	3	4
Plan participants’ contributions	46	46
Actuarial (gain) loss	0	(4)
Benefit payments	57	57
Settlements	0	0
Ending balance	83	91	103
Change in plan assets:
Beginning balance	0	0
Actual (loss) return on plan assets	0	0
Employer contributions	11	11
Benefit payments	(57)	(57)
Settlements	0	0
Ending balance	0	0	$ 0
Funded status at December 31	(83)	(91)
Amounts recognized in Consolidated Balance Sheets:
Accrued benefit liability	(83)	(91)
Net amount recognized	(83)	(91)
Amounts recognized in Accumulated Other Comprehensive Loss:
Unrecognized prior service cost	(1)	(1)
Unrecognized net loss (gain)	(52)	(56)
Total	$ (53)	$ (57)
Discount Rate	3.40%	3.40%
Defined Benefit Plan, Accumulated Benefit Obligation	$ 83	$ 91
Mutual funds - taxable income
Change in plan assets:
Beginning balance	2,248
Ending balance	2,746	2,248
Mutual Funds - Equity [Member]
Change in plan assets:
Beginning balance	6,131
Ending balance	6,750	6,131
Level 1 | Recurring Basis
Change in plan assets:
Beginning balance	8,379
Ending balance	9,496	8,379
Level 1 | Recurring Basis | Mutual funds - taxable income
Change in plan assets:
Beginning balance	2,248
Ending balance	2,746	2,248
Level 1 | Recurring Basis | Mutual Funds - Equity [Member]
Change in plan assets:
Beginning balance	6,131
Ending balance	6,750	6,131
Level 2 | Recurring Basis
Change in plan assets:
Beginning balance	0
Ending balance	0	0
Level 2 | Recurring Basis | Mutual funds - taxable income
Change in plan assets:
Beginning balance	0
Ending balance	0	0
Level 2 | Recurring Basis | Mutual Funds - Equity [Member]
Change in plan assets:
Beginning balance	0
Ending balance	$ 0	$ 0

Employee Benefit Plans (Cash Fl

Employee Benefit Plans (Cash Flows) (Details)	Dec. 31, 2018USD ($)
Pension benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2,019	$ 1,000,000
2,020	1,095,000
2,021	1,283,000
2,022	740,000
2,023	774,000
2024-2028	3,091,000
Total	7,983,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2,019	11,000
2,020	10,000
2,021	10,000
2,022	9,000
2,023	9,000
2024-2028	34,000
Total	83,000
Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	10,000
Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 15,000

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Valuation Allowance [Line Items]
Operating Loss Carryforwards	$ 0								$ 0
Income tax expense	2,470,000	$ 2,821,000	$ 1,012,000	$ 2,383,000	$ 5,339,000	$ 3,852,000	$ 4,414,000	$ 5,127,000	8,686,000	$ 18,732,000	$ 14,125,000
Release of valuation allowance									(805,000)
Gain (Loss) on Sale of Equity Investments									6,700,000
Deferred Tax Assets, Gross	$ 13,958,000				11,792,000				13,958,000	11,792,000
Valuation allowance					$ 805,000					805,000
Federal Income Tax Expense on Securities Transactions									0	1,000,000	$ 326,000
Adjustments for New Accounting Pronouncement [Member]
Valuation Allowance [Line Items]
Income tax expense									700,000	900,000
Pension benefits
Valuation Allowance [Line Items]
Employer contributions									$ 3,195,000	$ 565,000

Income Taxes (Effective Tax Rat

Income Taxes (Effective Tax Rate) (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amount
Income tax computed at statutory federal corporate income tax rate									$ 11,505	$ 20,045	$ 15,785
Release of valuation allowance									(805)
Tax-exempt interest income									(554)	(1,092)	(1,170)
Bank owned life insurance									(393)	(683)	(495)
Investments in tax credit funds									(125)	(221)	(164)
Other, net									95	(60)	169
Income tax expense	$ 2,470	$ 2,821	$ 1,012	$ 2,383	$ 5,339	$ 3,852	$ 4,414	$ 5,127	$ 8,686	$ 18,732	$ 14,125
Effective Income Tax Rate Reconciliation, Percent									15.90%	32.70%	31.30%
Rate
Federal income tax rate									21.00%	35.00%	35.00%
Release of valuation allowance									(1.50%)
Tax-exempt interest income									(1.00%)	(1.90%)	(2.60%)
Bank owned life insurance									(0.70%)	(1.20%)	(1.10%)
Investments in tax credit funds									(0.20%)	(0.40%)	(0.40%)
Other, net									0.20%	(0.10%)	0.40%
Tax cuts and jobs act [Member]
Amount
Other, net									$ (705)	$ 897
Rate
Other, net									(1.30%)	1.60%
Award Type [Member]
Amount
Other, net									$ (332)	$ (154)
Rate
Other, net									(0.60%)	(0.30%)

Income Taxes (Income Tax Expens

Income Taxes (Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Current income tax expense									$ 8,995	$ 21,511	$ 16,587
Deferred income tax benefit									(309)	(2,779)	(2,462)
Income tax expense	$ 2,470	$ 2,821	$ 1,012	$ 2,383	$ 5,339	$ 3,852	$ 4,414	$ 5,127	$ 8,686	$ 18,732	$ 14,125

Income Taxes (Deferred Tax Asse

Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets
Allowance for loan losses	$ 8,559	$ 6,992
Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross	2,678	555
Accrued employee benefits	1,843	2,569
Tax credit investments	805	1,560
Other	73	116
Gross deferred tax assets	13,958	11,792
Valuation allowance		805
Total deferred tax assets	13,958	10,987
Deferred Tax Liabilities
Purchase accounting adjustments	5,839	6,092
Deferred loan income	3,061	2,459
Bank premises and equipment (a)	2,047	307
Derivative instruments	228	300
Tax credit investments	82	0
Other	673	484
Total deferred tax liabilities	11,930	9,642
Net deferred tax asset	$ 2,028	$ 1,345

Income Taxes (Uncertain Tax Pos

Income Taxes (Uncertain Tax Positions) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Uncertain tax positions, beginning of year	$ 550	$ 522
Gross increase based on tax positions related to current year	55	42
Gross increase for tax position taken during prior years	13	20
Gross decrease due to the statute of limitations	(195)	(34)
Uncertain tax positions, end of year	$ 423	$ 550

Income Taxes (Valuation Allowan

Income Taxes (Valuation Allowance) (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income tax expense	$ 2,470	$ 2,821	$ 1,012	$ 2,383	$ 5,339	$ 3,852	$ 4,414	$ 5,127	$ 8,686	$ 18,732	$ 14,125
Deferred Tax Assets, Gross	$ 13,958				$ 11,792				13,958	11,792
Adjustments for New Accounting Pronouncement [Member]
Income tax expense									$ 700	$ 900

Earnings Per Common Share (Calc

Earnings Per Common Share (Calculations of Basic and Diluted Earnings per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Distributed earnings allocated to common shareholders									$ 21,334	$ 15,159	$ 11,532
Undistributed earnings allocated to common shareholders									24,660	23,115	19,483
Net earnings allocated to common shareholders									$ 45,994	$ 38,274	$ 31,015
Weighted-average number of common shares outstanding - basic	19,337,403	19,325,457	19,160,728	18,126,089	18,069,467	18,029,991	18,044,574	18,056,202	18,991,768	18,050,189	18,013,693
Effect of potentially dilutive common shares									130,492	158,495	141,770
Total weighted-average diluted common shares outstanding	19,483,452	19,466,865	19,293,381	18,256,035	18,240,092	18,192,957	18,203,752	18,213,533	19,122,260	18,208,684	18,155,463
Earnings per common share - basic	$ 0.71	$ 0.65	$ 0.41	$ 0.64	$ 0.50	$ 0.49	$ 0.54	$ 0.60	$ 2.42	$ 2.12	$ 1.72
Earnings per common share - diluted	$ 0.71	$ 0.65	$ 0.41	$ 0.64	$ 0.49	$ 0.48	$ 0.53	$ 0.60	$ 2.41	$ 2.10	$ 1.71
Antidilutive Securities Excluded from Computation of Earnings Per Share
Restricted shares, stock options and stock appreciation rights									1,748	453	20,769

Financial Instruments with Of_3

Financial Instruments with Off-Balance Sheet Risk (Loan Commitments and Standby Letters of Credit) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loan Commitments and Standby Letters of Credit [Line Items]
Contractual Loan Commitments			$ 15,000
Unused Commitments to Extend Credit	$ 490,270	$ 456,976
Standby letters of credit	10,214	20,873
Home equity lines of credit
Loan Commitments and Standby Letters of Credit [Line Items]
Contractual Loan Commitments	101,265	83,949
Construction Loans [Member]
Loan Commitments and Standby Letters of Credit [Line Items]
Contractual Loan Commitments	74,734	112,475
Other loan commitments
Loan Commitments and Standby Letters of Credit [Line Items]
Contractual Loan Commitments	$ 314,271	$ 260,552

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Regulatory Matters [Abstract]
Required Reserve Balances with Federal Reserve Bank	$ 16,400,000	$ 17,700,000
Regulatory Capital Requirements
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval	61,900,000
Holding Company
Regulatory Capital Requirements
Common Equity Tier 1 Capital	$ 378,855,000	$ 327,172,000
Common Equity Tier 1 Risk Based Capital to Risk Weighted Assets	13.60%	13.30%
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy	$ 125,235,000	$ 110,998,000
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%	4.50%
Common Equity Tier 1 Risk Based Capital Required to be Well Capitalized	$ 180,895,000	$ 160,330,000
Common Equity Tier 1 Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.50%	6.50%
Tier One Risk Based Capital	$ 386,138,000	$ 334,279,000
Tier One Risk Based Capital to Risk Weighted Assets	13.90%	13.60%
Tier One Risk Based Capital Required for Capital Adequacy	$ 166,980,000	$ 147,997,000
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	6.00%
Tier One Risk Based Capital Required to be Well Capitalized	$ 222,640,000	$ 197,330,000
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	8.00%
Capital	$ 406,333,000	$ 355,977,000
Capital to Risk Weighted Assets	14.60%	14.40%
Capital Required for Capital Adequacy	$ 222,640,000	$ 197,330,000
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Capital Required to be Well Capitalized	$ 278,300,000	$ 246,662,000
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Leverage Capital	$ 386,138,000	$ 334,279,000
Tier One Leverage Capital to Average Assets	10.00%	9.80%
Tier One Leverage Capital Required for Capital Adequacy	$ 154,615,000	$ 137,119,000
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 193,269,000	$ 171,399,000
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%
Regulatory Capital Conservation Buffer	$ 183,693,000	$ 158,647,000
Regulatory Capital Conservation Buffer Ratio	0.066	0.064
Risk Weighted Assets	2,782,995,000	2,466,620,000
Bank
Regulatory Capital Requirements
Common Equity Tier 1 Capital	$ 365,063,000	$ 305,216,000
Common Equity Tier 1 Risk Based Capital to Risk Weighted Assets	13.20%	12.40%
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy	$ 124,870,000	$ 110,654,000
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%	4.50%
Common Equity Tier 1 Risk Based Capital Required to be Well Capitalized	$ 180,367,000	$ 159,833,000
Common Equity Tier 1 Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.50%	6.50%
Tier One Risk Based Capital	$ 365,063,000	$ 305,216,000
Tier One Risk Based Capital to Risk Weighted Assets	13.20%	12.40%
Tier One Risk Based Capital Required for Capital Adequacy	$ 166,493,000	$ 147,539,000
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	6.00%
Tier One Risk Based Capital Required to be Well Capitalized	$ 221,990,000	$ 196,718,000
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	8.00%
Capital	$ 385,258,000	$ 324,026,000
Capital to Risk Weighted Assets	13.90%	13.20%
Capital Required for Capital Adequacy	$ 221,990,000	$ 196,718,000
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Capital Required to be Well Capitalized	$ 277,488,000	$ 245,898,000
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Leverage Capital	$ 365,063,000	$ 305,216,000
Tier One Leverage Capital to Average Assets	9.50%	8.90%
Tier One Leverage Capital Required for Capital Adequacy	$ 154,357,000	$ 136,939,000
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 192,947,000	$ 171,174,000
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%
Regulatory Capital Conservation Buffer	$ 163,268,000	$ 127,308,000
Regulatory Capital Conservation Buffer Ratio	0.059	0.052
Risk Weighted Assets	2,774,879,000	2,458,975,000
Minimum | Holding Company
Regulatory Capital Requirements
Regulatory Capital Conservation Buffer	69,575,000	61,666,000
Regulatory Capital Conservation Buffer Ratio	0.025	0.025
Minimum | Bank
Regulatory Capital Requirements
Regulatory Capital Conservation Buffer	69,372,000	61,474,000
Regulatory Capital Conservation Buffer Ratio	$ 0.025	$ 0.025

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under 2006 Equity Plan	891,340
Common shares authorized under the 2006 Equity Plan	500,000
Unrecognized stock-based compensation expense related to unvested awards, amount	$ 2,300,000
Unrecognized stock-based compensation expense related to unvested awards, weighted-average period of recognition	1 year 9 months
Common shares issued under compensation plan for Board of Directors	$ 298,000	$ 295,000	$ 245,000
Allocated Share-based Compensation Expense	2,575,000	1,802,000	1,392,000
Stock-based compensation	2,359,000	1,747,000	1,332,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	541,000	378,000	487,000
Allocated Share-based Compensation Expense, Net of Tax	2,034,000	1,424,000	905,000
Treasury Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued under compensation plan for Board of Directors	194,000	207,000	263,000
Stock-based compensation	$ 416,000		0
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period	10 years
Awards vesting period	3 years
Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of awards released in period	$ 2,800,000	1,100,000	$ 1,000,000
Restricted Shares | Employees | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period	1 year
Restricted Shares | Employees | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period	3 years
Restricted Shares | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period			6 months
Performance-based vesting restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded	84,876
Time-based vesting restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded	21,929
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	21,929
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 156,000
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense		$ 55,000
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 60,000		$ 60,000

Stock-Based Compensation (Stock

Stock-Based Compensation (Stock Appreciation Rights) (Details) - SARs	12 Months Ended
	Dec. 31, 2018USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised | shares	314
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price | $ / shares	$ 23.77
Number of Common Shares Subject to SARs
Outstanding at January 1 (in shares) | shares	314
Forfeited (in shares) | shares	0
Outstanding at December 31 (in shares) | shares	0
Weighted- Average Exercise Price
Outstanding at January 1 (in dollars per share) | $ / shares	$ 23.77
Forfeited (in dollars per share) | $ / shares	0
Outstanding at December 31 (in dollars per share) | $ / shares	$ 0
Weighted - Average Grant Date Fair Value
Exercisable at December 31 (in shares) | shares	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercisable, Weighted Average Exercise Price | $ / shares	$ 0
Outstanding at December 31 | $	$ 0
Exercisable at December 31 | $	$ 0
Awards expiration period	10 years

Stock-Based Compensation (Restr

Stock-Based Compensation (Restricted Shares) (Details)	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Performance-based vesting restricted stock [Member]
Number of Shares
Outstanding at January 1 (in shares)	176,218
Awarded	84,876
Released	83,311
Forfeited (in shares)	2,011
Outstanding at December 31 (in shares)	175,772
Weighted - Average Grant Date Fair Value
Outstanding at January 1 (in dollars per share) | $ / shares	$ 25.50
Awarded (usd per share) | $ / shares	35.43
Released (usd per share) | $ / shares	23.62
Forfeited (in dollars per share) | $ / shares	34.34
Outstanding at December 31 (in dollars per share) | $ / shares	$ 31.08
Time-based vesting restricted stock [Member]
Number of Shares
Outstanding at January 1 (in shares)	33,082
Awarded	21,929
Released	11,332
Forfeited (in shares)	0
Outstanding at December 31 (in shares)	43,679
Weighted - Average Grant Date Fair Value
Outstanding at January 1 (in dollars per share) | $ / shares	$ 22.85
Awarded (usd per share) | $ / shares	36.38
Released (usd per share) | $ / shares	22.84
Forfeited (in dollars per share) | $ / shares	0
Outstanding at December 31 (in dollars per share) | $ / shares	$ 29.64
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	21,929

Stock-Based Compensation (Sto_2

Stock-Based Compensation (Stock-Based Compensation and Related Tax Benefit) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 2,359,000	$ 1,747,000	$ 1,332,000
Unrestricted Stock Granted to Employees	12,144
Total stock-based compensation		2,575,000	1,802,000	1,392,000
Recognized tax benefit		(541,000)	$ (378,000)	(487,000)
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		156,000
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation		60,000		60,000
Director [Member] | Restricted Shares | Time-based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	3,600
Treasury Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		416,000		$ 0
Treasury Stock | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 128,000

Stock-Based Compensation Perfor

Stock-Based Compensation Performance Unit Awards (Details) $ in Millions	Dec. 31, 2018USD ($)
Performance Unit Awards [Abstract]
Maximum Aggregate Value of Performance Unit Award Outstanding	$ 1.3

Acquisitions (Details)

Acquisitions (Details) - USD ($)	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 13, 2018
Business Acquisition [Line Items]
Loans held for sale	$ 5,470,000				$ 2,510,000				$ 5,470,000	$ 2,510,000
Bank owned life insurance	68,934,000				62,176,000				68,934,000	62,176,000
Goodwill	151,245,000				133,111,000				151,245,000	133,111,000	$ 132,631,000
Noninterest Expense									125,977,000	107,975,000	106,911,000
Net loss on asset disposals and other transactions	$ (15,000)	$ 12,000	$ (405,000)	$ 74,000	$ (144,000)	$ (3,000)	$ 109,000	$ (25,000)	(334,000)	(63,000)	(1,133,000)
Salaries and employee benefit costs									69,308,000	60,276,000	57,433,000
Professional fees									7,862,000	6,575,000	7,436,000
Data processing and software expense									5,419,000	4,441,000	3,763,000
Other non-interest expense									13,746,000	$ 8,536,000	$ 8,717,000
FIRST PRESTONSBURG BANCSHARES INC. [Member]
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments									$ 428,000
ASB Financial Corp.
Business Acquisition [Line Items]
Common shares electing cash consideration	31,763,000								31,763,000
Cash purchase price per share	$ 20								$ 20			$ 20
Common shares electing stock consideration	1,947,271,000								1,947,271,000
Number of common shares of Peoples issued for each common share of acquired company	0.592								0.592			0.592
Price per Peoples' common share, as of April 13, 2018	$ 35.48								$ 35.48
Common share consideration	$ 40,898,000								$ 40,898,000
Cash in lieu of fractional common shares of Peoples	2,000								2,000
Total consideration	41,500,000								41,535,000
Cash and due from banks	5,332,000								5,332,000
Loans held for sale	2,539,000								2,539,000
Bank premises and equipment, net of accumulated depreciation	3,485,000								3,485,000
Bank owned life insurance	4,803,000								4,803,000
Other intangible assets	2,639,000								2,639,000
Other assets	3,112,000								3,112,000
Total assets	278,938,000								278,938,000
Deposits	198,629,000								198,629,000
Short-term borrowings	54,824,000								54,824,000
Accrued expenses and other liabilities	2,084,000								2,084,000
Total liabilities	255,537,000								255,537,000
Net assets	23,401,000								23,401,000
Goodwill	18,134,000	$ 18,600,000							18,134,000			$ 18,134,000
Shares, Outstanding												1,979,034
Noninterest Expense									7,300,000
Net loss on asset disposals and other transactions									203,000
Salaries and employee benefit costs									2,400,000
Professional fees									1,100,000
Data processing and software expense									59,000
Marketing Expense									119,000
Other non-interest expense									3,600,000
ASB Financial Corp. | Non-interest-bearing deposits [Member]
Business Acquisition [Line Items]
Deposits	29,487,000								29,487,000
ASB Financial Corp. | Interest-bearing Deposits [Member]
Business Acquisition [Line Items]
Deposits	169,142,000								169,142,000
Cash [Member]
Business Acquisition [Line Items]
Cash consideration	$ 635,000								635,000
Cash [Member]
Business Acquisition [Line Items]
Total consideration									$ 0
FIRST PRESTONSBURG BANCSHARES INC. [Member]
Business Acquisition [Line Items]
Number of common shares of Peoples issued for each common share of acquired company	12.512								12.512
Deposits	$ 236,600,000								$ 236,600,000
Property, Plant and Equipment [Member] | ASB Financial Corp.
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments									165,000
Other Assets [Member] | ASB Financial Corp.
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments									369,000
Other Liabilities [Member] | ASB Financial Corp.
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments									632,000
Available-for-sale securities | ASB Financial Corp.
Business Acquisition [Line Items]
Fair value	18,155,000								18,155,000
Held-to-maturity securities | ASB Financial Corp.
Business Acquisition [Line Items]
Fair value	649,000								649,000
Investment in Federal Home Loan Bank Stock [Member] | ASB Financial Corp.
Business Acquisition [Line Items]
Fair value	1,596,000								1,596,000
Investment securities | ASB Financial Corp.
Business Acquisition [Line Items]
Fair value	20,400,000								20,400,000
Loans [Member] | ASB Financial Corp.
Business Acquisition [Line Items]
Fair value	236,628,000								236,628,000
Loans [Member] | FIRST PRESTONSBURG BANCSHARES INC. [Member]
Business Acquisition [Line Items]
Fair value	140,100,000								140,100,000
Total assets	308,500,000								308,500,000
Bank Overdrafts [Member] | ASB Financial Corp.
Business Acquisition [Line Items]
Fair value	$ 438,000								$ 438,000

Acquisitions Acquired loans (De

Acquisitions Acquired loans (Details) - ASB Financial Corp. $ in Thousands	Dec. 31, 2018USD ($)
Financial Asset Acquired and No Credit Deterioration [Member]
Contractual cash flows	$ 342,087
Nonaccretable difference	59,967
Expected cash flows	282,120
Accretable yield	54,029
Fair value	228,091
Financial Asset Acquired with Credit Deterioration [Member]
Nonaccretable difference	5,908
Contractual cash flows	16,054
Expected cash flows	10,146
Accretable yield	2,047
Fair value	$ 8,099

Parent Company Only Financial_3

Parent Company Only Financial Information (Condensed Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 61,775	$ 58,121
Due from subsidiary bank	584	9,486
Total available-for-sale securities	791,891	795,187
Other investment securities (a)	42,985	38,371
Other assets	40,391	34,890
Total assets	3,991,454	3,581,686
Liabilities
Accrued expenses and other liabilities	50,007	39,254
Dividends payable	291	270
Junior subordinated debt securities	7,283	7,107
Total liabilities	3,471,314	3,123,094
Common stockholders' equity	520,140	458,592	$ 435,261	$ 419,789
Total liabilities and stockholders' equity	3,991,454	3,581,686
Bank
Assets
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	506,200	431,482
Non-Bank
Assets
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	8,298	1,812
Holding Company
Assets
Cash and due from banks	50	50
Interest-bearing deposits in subsidiary bank	13,750	9,270
Total available-for-sale securities	0	6,933
Other investment securities (a)	216
Other assets	2,808	1,700
Total assets	531,906	460,733
Liabilities
Accrued expenses and other liabilities	1,898	1,471
Junior subordinated debt securities	9,577	400
Total liabilities	11,766	2,141
Common stockholders' equity	520,140	458,592
Total liabilities and stockholders' equity	$ 531,906	$ 460,733

Parent Company Only Financial_4

Parent Company Only Financial Information (Condensed Statements of Income) (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements
Net gain on investment securities	$ 0	$ 0	$ (147)	$ 1	$ 764	$ 340	$ 18	$ 1,861	$ (146)	$ 2,983	$ 930
Total interest income									151,264	126,525	115,444
Other expense	29,713	29,292	29,054	27,318	26,152	26,468	25,809	25,689
Applicable income tax expense	2,470	2,821	1,012	2,383	5,339	3,852	4,414	5,127	8,686	18,732	14,125
Net income	$ 13,897	$ 12,725	$ 7,892	$ 11,741	$ 9,001	$ 8,809	$ 9,766	$ 10,895	46,255	38,471	31,157
Bank
Condensed Financial Statements
Dividends from subsidiary bank									13,500	27,000	20,500
Non-Bank
Condensed Financial Statements
Dividends from subsidiary bank									2,500	20,000	1,250
Holding Company
Condensed Financial Statements
Net gain on investment securities									0	2,602	0
Interest and other income									357	237	209
Total interest income									16,357	49,839	21,959
Interest on junior subordinated debentures held by subsidiary trust									520	346	397
Payment for Administrative Fees									1,561	1,361	1,131
Other expense									4,647	3,380	3,154
Total expenses									6,728	5,087	4,682
Income before federal income taxes and equity in (excess dividends from) undistributed earnings of subsidiaries									9,629	44,752	17,277
Applicable income tax expense									(2,511)	(1,309)	(1,718)
Equity in (excess dividends from) undistributed earnings of subsidiaries									34,115	(7,590)	12,162
Net income									$ 46,255	$ 38,471	$ 31,157

Parent Company Only Financial_5

Parent Company Only Financial Information (Statement of Cash Flow) (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities:
Net income	$ 13,897	$ 12,725	$ 7,892	$ 11,741	$ 9,001	$ 8,809	$ 9,766	$ 10,895	$ 46,255	$ 38,471	$ 31,157
Depreciation, amortization and accretion, net									18,204	18,142	19,169
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on investment securities	0	$ 0	$ 147	(1)	(764)	(340)	(18)	(1,861)	146	(2,983)	(930)
Net cash provided by operating activities									75,243	61,027	60,658
Investing activities:
Business acquisitions, net of cash received									4,695	(1,069)	(244)
Net cash used in investing activities									(130,156)	(162,688)	(198,358)
Financing activities:
Payments on long-term borrowings									(4,591)	(5,738)	(24,361)
Purchase of treasury stock									5,000
Proceeds from issuance of common shares									25	9	18
Cash dividends paid									(20,915)	(14,706)	(11,173)
Excess tax benefit from share-based payments									0	0	26
Net cash provided by financing activities									60,331	107,709	132,731
Net increase (decrease) in cash and cash equivalents									5,418	6,048	(4,969)
Cash and cash equivalents at beginning of period				72,194		66,146	66,146	66,146	72,194	66,146	71,115
Cash and cash equivalents at end of period	77,612				72,194				77,612	72,194	66,146
Supplemental cash flow information:
Interest paid									19,920	13,001	10,756
Holding Company
Operating activities:
Net income									46,255	38,471	31,157
Depreciation, amortization and accretion, net									9,177	(6,525)	190
Adjustments to reconcile net income to net cash provided by operating activities:
(Equity in) excess dividends from undistributed earnings of subsidiaries									(34,115)	7,590	(12,162)
Gain on investment securities									0	(2,602)	0
Other, net									31	2,810	355
Net cash provided by operating activities									21,348	39,744	19,540
Investing activities:
Proceeds from Sale, Maturity and Collection of Investments									5,388	2,359
Investment in subsidiaries									(31,813)	(50,883)	(22,769)
(Increase) decrease in receivable from subsidiary									32,236	25,496	23,389
Business acquisitions, net of cash received									(637)		0
Payments for (Proceeds from) Other Investing Activities									228	(229)
Net cash used in investing activities									5,402	(23,257)	620
Financing activities:
Purchase of treasury stock									(1,380)	(508)	(5,480)
Proceeds from issuance of common shares									0	9	18
Cash dividends paid									(20,915)	(14,706)	(11,173)
Excess tax benefit from share-based payments									25	0	26
Net cash provided by financing activities									(22,270)	(15,205)	(16,609)
Net increase (decrease) in cash and cash equivalents									4,480	1,282	3,551
Cash and cash equivalents at the beginning of year					9,320					9,320	8,038	$ 4,487
Cash and cash equivalents at beginning of period				$ 9,320		$ 8,038	$ 8,038	$ 8,038	9,320	8,038
Cash and cash equivalents at end of period	$ 13,800				$ 9,320				13,800	9,320	8,038
Supplemental cash flow information:
Interest paid									$ 513	$ 364	$ 433

Summarized Quarterly Informat_3

Summarized Quarterly Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Summarized Quarterly Information (Unaudited) [Abstract]
Total interest income	$ 40,638	$ 39,631	$ 37,769	$ 33,226	$ 32,772	$ 29,817	$ 31,208	$ 32,728
Total interest expense	6,517	6,307	4,961	3,867	3,650	2,872	3,118	3,508	$ 21,652	$ 13,148	$ 10,579
Net interest income	34,121	33,324	32,808	29,359	29,122	26,945	28,090	29,220	129,612	113,377	104,865
Provision for loan losses	975	1,302	1,188	1,983	1,115	624	947	1,086
Net loss on asset disposals and other transactions	(15)	12	(405)	74	(144)	(3)	109	(25)	(334)	(63)	(1,133)
Net gain on investment securities	0	0	(147)	1	764	340	18	1,861	(146)	2,983	930
Total non-interest income excluding net gains and losses	14,192	14,341	13,807	14,894	13,119	13,334	13,590	12,610
Amortization of other intangible assets	861	862	861	754	913	863	871	869	3,338	3,516	4,030
Acquisition-related expenses	382	675	6,056	149	341	0	0	0
Other expense	29,713	29,292	29,054	27,318	26,152	26,468	25,809	25,689
Applicable income tax expense	2,470	2,821	1,012	2,383	5,339	3,852	4,414	5,127	8,686	18,732	14,125
Net income	$ 13,897	$ 12,725	$ 7,892	$ 11,741	$ 9,001	$ 8,809	$ 9,766	$ 10,895	$ 46,255	$ 38,471	$ 31,157
Earnings per common share - basic	$ 0.71	$ 0.65	$ 0.41	$ 0.64	$ 0.50	$ 0.49	$ 0.54	$ 0.60	$ 2.42	$ 2.12	$ 1.72
Earnings per common share - diluted	$ 0.71	$ 0.65	$ 0.41	$ 0.64	$ 0.49	$ 0.48	$ 0.53	$ 0.60	$ 2.41	$ 2.10	$ 1.71
Weighted-average number of common shares outstanding - basic	19,337,403	19,325,457	19,160,728	18,126,089	18,069,467	18,029,991	18,044,574	18,056,202	18,991,768	18,050,189	18,013,693
Weighted-average number of common shares outstanding - diluted	19,483,452	19,466,865	19,293,381	18,256,035	18,240,092	18,192,957	18,203,752	18,213,533	19,122,260	18,208,684	18,155,463

Revenue (Details)

Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenue Recognition and Deferred Revenue [Abstract]
Commission and fees from sale of insurance policies	$ 12,787
Cumulative Effect on Retained Earnings, Net of Tax	3,700
Deferred Revenue	5,055	$ 4,700	$ 4,700
Revenues	$ 207

Revenue Revenue from Contract w

Revenue Revenue from Contract with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commission and fees from sale of insurance policies	$ 12,787
Fees related to third party insurance administration services	573
Performance-based insurance commissions	1,452
Interchange electronic banking income	9,721
Promotional and usage electronic banking income	1,756
Ongoing maintenance fees for deposit accounts	2,718
Transactional-based fees for deposit accounts	7,060
Transactional-based fees included in other non-interest income	961
Revenue from Contract with Customer, Excluding Assessed Tax	50,252
Fiduciary and Trust [Member]
Commercial loan swap fees	12,543	$ 11,558	$ 10,589
Interest Rate Swap | transaction fee [Member]
Commercial loan swap fees	681	$ 1,232	$ 1,076
Transferred over Time [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	40,098
Transferred at Point in Time [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 10,154

Revenue Contract Assets and Lia

Revenue Contract Assets and Liabilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Revenue Recognition and Deferred Revenue [Abstract]
Balance, January 1, 2018 (a)	$ 4,700
Revenues	207
Deferred Revenue, Additions	5,055
Deferred Revenue, Revenue Recognized	4,700
Accrued Fees and Other Revenue Receivable	207
Balance, December 31, 2018	$ 5,055

Derivative Financial Instrume_3

Derivative Financial Instrument (Details)	12 Months Ended
	Dec. 31, 2018USD ($)contract	Dec. 31, 2017USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)
Derivative [Line Items]
Weighted average pay rates	2.37%	1.88%
Weighted average receive rates	2.57%	2.30%
Weighted average maturity	Feb. 24, 2025	Dec. 29, 2024
Unrealized gains	$ 860,000	$ 1,129,000
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	341,000	72,000
Derivative assets (b)	4,500,000	4,600,000
Derivative liabilities (c)	3,600,000	3,200,000
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	38,000	0
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	18,000	0
Fair Value of Interest Rate Swaps	2,500,000	3,000,000
Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts	453,400,000	363,300,000
Derivative Asset, Notional Amount	226,662,000	181,659,000
Derivative Liability, Notional Amount	226,662,000	181,659,000
Fair Value of Interest Rate Swaps	2,451,000	2,971,000
Interest Rate Swap
Derivative [Line Items]
Notional amounts	110,000,000	60,000,000	$ 50,000,000
Interest Income, Other	$ 38,000	0
Derivative, Number of Instruments Held | contract	12
Derivative Asset, Notional Amount	$ 60,000,000	40,000,000
Derivative Liability, Notional Amount	50,000,000	20,000,000
Interest Rate Swap | Minimum
Derivative [Line Items]
Derivative, Fixed Interest Rate			2.92%
Interest Rate Swap | Maximum
Derivative [Line Items]
Derivative, Fixed Interest Rate			3.00%
Other Assets [Member] | Interest Rate Swap
Derivative [Line Items]
Fair Value of Interest Rate Swaps	2,093,000	1,623,000
Liability [Member] | Interest Rate Swap
Derivative [Line Items]
Fair Value of Interest Rate Swaps	$ 1,111,000	$ 270,000
ASB Financial Corp. | Interest Rate Swap
Derivative [Line Items]
Notional amounts				$ 7,000,000

Derivative Financial Instrume_4

Derivative Financial Instrument Interest Rate Swaps (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2018
Derivative [Line Items]
Derivative, Average Fixed Interest Rate	2.37%	1.88%
Derivative, Average Variable Interest Rate	2.57%	2.30%
Derivative, Maturity Date	Feb. 24, 2025	Dec. 29, 2024
Derivative, Gain (Loss) on Derivative, Net	$ 860	$ 1,129
Interest Rate Swap
Derivative [Line Items]
Derivative, Notional Amount	$ 110,000	$ 60,000	$ 50,000

Derivative Financial Instrume_5

Derivative Financial Instrument Derivatives in Accumulated Other Comprehensive Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$ 341,000	$ 72,000
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	$ 18,000	$ 0

Derivative Financial Instrume_6

Derivative Financial Instrument Cash Flow Hedges (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Fair Value of Interest Rate Swaps	$ 2,500,000	$ 3,000,000
Interest Rate Swap
Derivative [Line Items]
Interest Income, Other	38,000	0
Derivative Asset, Notional Amount	60,000,000	40,000,000
Derivative Liability, Notional Amount	50,000,000	20,000,000
Other Assets [Member] | Interest Rate Swap
Derivative [Line Items]
Fair Value of Interest Rate Swaps	2,093,000	1,623,000
Liability [Member] | Interest Rate Swap
Derivative [Line Items]
Fair Value of Interest Rate Swaps	$ 1,111,000	$ 270,000

Derivative Financial Instrume_7

Derivative Financial Instrument Non-Designated Hedges (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2018
Derivative [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$ 341,000	$ 72,000
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	$ 38,000	$ 0
Derivative, Average Fixed Interest Rate	2.37%	1.88%
Derivative, Average Variable Interest Rate	2.57%	2.30%
Derivative, Maturity Date	Feb. 24, 2025	Dec. 29, 2024
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	$ 18,000	$ 0
Fair Value of Interest Rate Swaps	2,500,000	3,000,000
Derivative, Gain (Loss) on Derivative, Net	860,000	1,129,000
Interest Rate Swap
Derivative [Line Items]
Derivative, Notional Amount	110,000,000	60,000,000	$ 50,000,000
Interest Income, Other	38,000	0
Derivative Asset, Notional Amount	60,000,000	40,000,000
Derivative Liability, Notional Amount	50,000,000	20,000,000
Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount	453,400,000	363,300,000
Derivative Asset, Notional Amount	226,662,000	181,659,000
Fair Value of Interest Rate Swaps	2,451,000	2,971,000
Derivative Liability, Notional Amount	$ 226,662,000	$ 181,659,000