Peoples Bancorp (PEBO) 10-Q 1 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 29, 2015
Entity Information [Line Items]
Entity Registrant Name	PEOPLES BANCORP INC.
Entity Central Index Key	318300
Document Type	10-Q
Document Period End Date	31-Mar-15
Amendment Flag	FALSE
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	-19
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		18,376,505

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Assets
Cash and due from banks	$49,792	$42,230
Interest-bearing deposits in other banks	116,610	19,224
Total cash and cash equivalents	166,402	61,454
Available-for-sale investment securities, at fair value (amortized cost of $748,622 at March 31, 2015 and $632,967 at December 31, 2014)	760,822	636,880
Held-to-maturity investment securities, at amortized cost (fair value of $48,774 at March 31, 2015 and $48,442 at December 31, 2014)	48,045	48,468
Other investment securities, at cost	36,251	28,311
Total investment securities	845,118	713,659
Loans, net of deferred fees and costs	1,996,296	1,620,898
Allowance for loan losses	-18,088	-17,881
Net loans	1,978,208	1,603,017
Loans held for sale	5,039	4,374
Bank premises and equipment, net	50,686	40,335
Goodwill	124,660	98,562
Other intangible assets	18,777	10,596
Other assets	58,141	35,772
Total assets	3,247,031	2,567,769
Liabilities
Non-interest-bearing deposits	695,131	493,162
Interest-bearing deposits	1,886,005	1,439,912
Total deposits	2,581,136	1,933,074
Short-term borrowings	91,101	88,277
Long-term borrowings	130,074	179,083
Accrued expenses and other liabilities	25,502	27,217
Total liabilities	2,827,813	2,227,651
Stockholders’ Equity
Preferred stock, no par value, 50,000 shares authorized, no shares issued at March 31, 2015 and December 31, 2014	0	0
Common stock, no par value, 24,000,000 shares authorized, 18,918,525 shares issued at March 31, 2015 and 15,599,643 shares issued at December 31, 2014, including shares in treasury	342,484	265,742
Retained earnings	87,430	90,391
Accumulated other comprehensive income (loss), net of deferred income taxes	4,262	-1,301
Treasury stock, at cost, 599,738 shares at March 31, 2015 and 590,246 shares at December 31, 2014	-14,958	-14,714
Total stockholders’ equity	419,218	340,118
Total liabilities and stockholders’ equity	$3,247,031	$2,567,769

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Assets
Available-for-sale investment securities at amortized cost	$748,622	$632,967
Held-to-maturity investment securities at fair value	$48,774	$48,442
Stockholders’ Equity
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	18,918,525	15,426,973
Treasury stock - shares	599,738	590,246

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Interest Income:
Interest and fees on loans	$19,160	$13,373
Interest and dividends on taxable investment securities	4,363	4,340
Interest on tax-exempt investment securities	596	416
Other interest income	40	23
Total interest income	24,159	18,152
Interest Expense:
Interest on deposits	1,559	1,568
Interest on short-term borrowings	35	32
Interest on long-term borrowings	1,146	1,072
Total interest expense	2,740	2,672
Net interest income	21,419	15,480
Provision for loan losses	350	8
Net interest income after provision for loan losses	21,069	15,472
Other Income:
Insurance income	4,312	4,116
Deposit account service charges	2,295	2,111
Trust and investment income	2,047	1,847
Electronic banking income	1,980	1,539
Mortgage banking income	303	227
Net gain (loss) on investment securities	600	-30
Net (loss) gain on asset disposals and other transactions	-1,103	11
Other non-interest income	571	455
Total other income	11,005	10,276
Other Expenses:
Salaries and employee benefit costs	17,361	10,792
Professional fees	2,447	854
Net occupancy and equipment	2,295	1,816
Electronic banking expense	1,124	1,082
Data processing and software	735	570
Amortization of other intangible assets	673	263
Marketing expense	645	459
Franchise tax	548	385
Communication expense	502	359
FDIC insurance	424	260
Foreclosed real estate and other loan expenses	321	215
Other non-interest expense	5,839	1,762
Total other expenses	32,914	18,817
(Loss) income before income taxes	-840	6,931
Income tax (benefit) expense	-151	2,148
Net (loss) income	-689	4,783
(Loss) earnings per common share - basic	($0.04)	$0.45
(Loss) earnings per common share - diluted	($0.04)	$0.44
Weighted-average number of common shares outstanding - basic	15,802,334	10,636,089
Weighted-average number of common shares outstanding - diluted	15,930,235	10,740,884
Cash dividends declared	$2,272	$1,623
Cash dividends declared per common share	$0.15	$0.15

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) income	($689)	$4,783
Available-for-sale investment securities:
Gross unrealized holding gain arising in the period	8,886	8,640
Related tax expense	-3,111	-3,024
Less: reclassification adjustment for net gain (loss) included in net income	600	-30
Related tax (expense) benefit	-210	11
Net effect on other comprehensive income	5,385	5,635
Defined benefit plans:
Net loss arising during the period	-26	-1,053
Related tax benefit	9	370
Amortization of unrecognized loss and service cost on benefit plans	32	31
Related tax expense	-12	-11
Recognition of loss due to settlement and curtailment	269	486
Related tax expense	-94	-170
Net effect on other comprehensive income (loss)	178	-347
Total other comprehensive income, net of tax	5,563	5,288
Total comprehensive income	$4,874	$10,071

Consolidated_Statement_of_Shar

Consolidated Statement of Shareholders' Equity (USD $)	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	NB&T Financial Group, Inc. [Member]
In Thousands, unless otherwise specified						Common Stock
Balance, December 31, 2014 at Dec. 31, 2014	$340,118	$265,742	$90,391	($1,301)	($14,714)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	-689		-689
Other comprehensive income, net of tax	5,563			5,563
Cash dividends declared	-2,272		-2,272
Stock Issued During Period, Value, Stock Options Exercised	0				0
Tax benefit from exercise of stock options	63	63
Reissuance of treasury stock for deferred compensation plan for Boards of Directors	155				155
Purchase of treasury stock	-534				-534
Common shares issued under dividend reinvestment plan	99	99
Common shares issued under compensation plan for Board of Directors	48	6			54
Stock Issued During Period, Value, Employee Stock Purchase Plan	75	-6			81
Stock-based compensation expense	565	565
Stock Issued During Period, Value, Acquisitions	76,027					76,027
Balance, March 31, 2015 at Mar. 31, 2015	$419,218	$342,484	$87,430	$4,262	($14,958)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Cash Flows [Abstract]
Net cash (used in) provided by operating activities	($5,884)	$10,331
Available-for-sale investment securities:
Purchases	-33,787	-33,014
Proceeds from sales	42,803	41,565
Proceeds from principal payments, calls and prepayments	21,646	15,642
Held-to-maturity investment securities:
Purchases	0	0
Proceeds from principal payments	316	312
Net decrease (increase) in loans	15,384	-29,981
Net expenditures for premises and equipment	-2,152	-1,674
Proceeds from sales of other real estate owned	55	138
Proceeds from bank owned life insurance contracts	0	3,067
Business acquisitions, net of cash received	103,597	0
Return of investment in limited partnership and tax credit funds	0	358
Net cash provided by (used in) investing activities	147,862	-3,587
Financing activities:
Net increase in non-interest-bearing deposits	76,533	7,738
Net (decrease) increase in interest-bearing deposits	-57,900	44,601
Net increase (decrease) in short-term borrowings	2,824	-44,813
Payments on long-term borrowings	-55,867	-1,668
Cash dividends paid	-2,149	-1,517
Purchase of treasury stock	-534	-266
Proceeds from issuance of common shares	0	2
Excess tax benefit from share-based payments	63	43
Net cash (used in) provided by financing activities	-37,030	4,120
Net increase in cash and cash equivalents	104,948	10,864
Cash and cash equivalents at beginning of period	61,454	53,820
Cash and cash equivalents at end of period	$166,402	$64,684

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies
	Basis of Presentation: The accompanying Unaudited Consolidated Financial Statements of Peoples Bancorp Inc. and its 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.) have been prepared in accordance with accounting principles generally accepted in the United States (“US GAAP”) for interim financial information and the instructions for Form 10-Q and Article 10 of Regulation S-X.  Accordingly, these financial statements do not contain all of the information and footnotes required by US GAAP for annual financial statements and should be read in conjunction with Peoples’ Annual Report on Form 10-K for the fiscal year ended December 31, 2014 (“2014 Form 10-K”).
	The accounting and reporting policies followed in the presentation of the accompanying Unaudited Consolidated Financial Statements are consistent with those described in Note 1 of the Notes to the Consolidated Financial Statements included in Peoples’ 2014 Form 10-K, as updated by the information contained in this Form 10-Q.  Management has evaluated all significant events and transactions that occurred after March 31, 2015, for potential recognition or disclosure in these consolidated financial statements.  In the opinion of management, these consolidated financial statements reflect all adjustments necessary to present fairly such information for the periods and dates indicated.  Such adjustments are normal and recurring in nature.  All significant intercompany accounts and transactions have been eliminated.  The Consolidated Balance Sheet at December 31, 2014, contained herein has been derived from the audited Consolidated Balance Sheet included in Peoples’ 2014 Form 10-K.
	The preparation of the consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes.  Results of operations for interim periods are not necessarily indicative of the results to be expected for the full year, due in part to seasonal variations and unusual or infrequently occurring items. Peoples’ insurance income includes performance-based insurance commissions that are recognized by Peoples when received, which typically occurs during the first quarter of each year. For the three months ended March 31, 2015 and 2014, the amount of performance-based insurance commissions recognized totaled $1.5 million and $1.2 million, respectively.
	New Accounting Pronouncements: From time to time, new accounting pronouncements are issued by 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.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments
	Available-for-sale securities measured at fair value on a recurring basis comprised the following:
				Fair Value Measurements at Reporting Date Using
	(Dollars in thousands)			Quoted Prices in Active Markets for Identical Assets		Significant			Significant Unobservable Inputs
				(Level 1)		Other			(Level 3)
						Observable
						Inputs
		Fair Value				(Level 2)
	March 31, 2015
	Obligations of:
	U.S. Treasury and government agencies	$	—	$	—	$	—		$	—
	U.S. government sponsored agencies	5,488		—		5,488			—
	States and political subdivisions	118,447		—		118,447			—
	Residential mortgage-backed securities	597,232		6,439		590,793			—
	Commercial mortgage-backed securities	28,241		—		28,241			—
	Bank-issued trust preferred securities	5,649		—		5,649			—
	Equity securities	5,765		5,562		203			—
	Total available-for-sale securities	$	760,822	$	12,001	$	748,821		$	—
	December 31, 2014
	Obligations of:
	U.S. Treasury and government agencies	$	1	$	—	$	1		$	—
	U.S. government sponsored agencies	5,950		—		5,950			—
	States and political subdivisions	64,743		—		64,743			—
	Residential mortgage-backed securities	527,291		—		527,291			—
	Commercial mortgage-backed securities	27,847		—		27,847			—
	Bank-issued trust preferred securities	5,645		—		5,645			—
	Equity securities	5,403		5,204		199			—
	Total available-for-sale securities	$	636,880	$	5,204	$	631,676		$	—
	Held-to-maturity securities reported at fair value comprised the following:
				Fair Value at Reporting Date Using
	(Dollars in thousands)			Quoted Prices in Active Markets for Identical Assets		Significant			Significant Unobservable Inputs
						Other
						Observable
						Inputs
		Fair Value		(Level 1)		(Level 2)			(Level 3)
	March 31, 2015
	Obligations of:
	States and political subdivisions	$	4,308	$	—	$	4,308		$	—
	Residential mortgage-backed securities	36,835		—		36,835			—
	Commercial mortgage-backed securities	7,631		—		7,631			—
	Total held-to-maturity securities	$	48,774	$	—	$	48,774		$	—
	December 31, 2014
	Obligations of:
	States and political subdivisions	$	4,282	$	—	$	4,282		$	—
	Residential mortgage-backed securities	36,740		—		36,740			—
	Commercial mortgage-backed securities	7,420		—		7,420			—
	Total held-to-maturity securities	$	48,442	$	—	$	48,442		$	—
	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 inputs) or fair values determined by pricing models using a market approach that considers observable market data, such as interest rate volatilities, 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 their overall assessment of the reasonableness of the fair values provided, and challenges prices when they believe a material discrepancy in pricing exists.
	Certain financial assets and financial liabilities are measured at fair value on a non-recurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment).  Financial assets measured at fair value on a non-recurring basis included the following:
	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 market value provided by independent, licensed or certified appraisers (Level 2 inputs).  At March 31, 2015, impaired loans with an aggregate outstanding principal balance of $1.4 million were measured and reported at a fair value of $1.3 million.  For the three months ended March 31, 2015, Peoples recognized $135,000 of losses on impaired loans through the allowance for loan losses.
	The following table presents the fair values of financial assets and liabilities carried on Peoples’ Consolidated Balance Sheets, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis:
		March 31, 2015					December 31, 2014
	(Dollars in thousands)	Carrying Amount		Fair Value			Carrying Amount			Fair Value
	Financial assets:
	Cash and cash equivalents	$	166,402	$	166,402		$	61,454		$	61,454
	Investment securities	845,118		845,847			713,659			713,633
	Loans	1,983,247		1,950,086			1,607,391			1,581,813
	Financial liabilities:
	Deposits	$	2,581,136	$	2,586,216		$	1,933,074		$	1,938,021
	Short-term borrowings	91,101		91,101			88,277			88,277
	Long-term borrowings	130,074		135,516			179,083			183,878
	The methodologies for estimating the fair value of financial assets and liabilities that are measured at fair value on a recurring or non-recurring basis are discussed above.  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:
	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 inputs).  In the current whole loan market, financial investors are generally requiring a much higher rate of return than the return inherent in loans if held to maturity given the lack of market liquidity.  This divergence accounts for the majority of the difference in carrying amount over fair value.
	Deposits: The fair value of fixed maturity certificates of deposit is estimated using a discounted cash flow calculation based on current rates offered for deposits of similar remaining maturities (Level 2 inputs).
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 inputs).
Bank premises and equipment, customer relationships, deposit base, banking center networks, and other information required to compute Peoples’ aggregate fair value 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	3 Months Ended
	Mar. 31, 2015
Investments [Abstract]
Investment Securities	Investment Securities
	Available-for-sale
	The following table summarizes Peoples’ available-for-sale investment securities:
	(Dollars in thousands)	Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
	March 31, 2015
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	—		$	—		$	—
	U.S. government sponsored agencies	5,351			137			—			5,488
	States and political subdivisions	114,775			3,734			(62		)	118,447
	Residential mortgage-backed securities	592,904			8,965			(4,637		)	597,232
	Commercial mortgage-backed securities	27,907			353			(19		)	28,241
	Bank-issued trust preferred securities	6,137			5			(493		)	5,649
	Equity securities	1,548			4,297			(80		)	5,765
	Total available-for-sale securities	$	748,622		$	17,491		$	(5,291	)	$	760,822
	December 31, 2014
	Obligations of:
	U.S. Treasury and government agencies	$	1		$	—		$	—		$	1
	U.S. government sponsored agencies	5,836			114			—			5,950
	States and political subdivisions	62,292			2,510			(59		)	64,743
	Residential mortgage-backed securities	529,245			5,910			(7,864		)	527,291
	Commercial mortgage-backed securities	28,021			112			(286		)	27,847
	Bank-issued trust preferred securities	6,132			3			(490		)	5,645
	Equity securities	1,440			4,044			(81		)	5,403
	Total available-for-sale securities	$	632,967		$	12,693		$	(8,780	)	$	636,880
	Peoples’ investment in equity securities was comprised largely of common stocks issued by various unrelated bank holding companies at both March 31, 2015 and December 31, 2014.  At March 31, 2015, there were no securities of a single issuer, other than U.S. Treasury and government agencies, and U.S. government sponsored agencies/enterprises, that exceeded 10% of stockholders' equity.
	The gross gains and gross losses realized by Peoples from sales of available-for-sale securities for the periods ended March 31 were as follows:
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015			2014
	Gross gains realized	$	600		$	514
	Gross losses realized	—			544
	Net gain (loss) realized	$	600		$	(30	)
	The cost of investment securities sold, and any resulting gain or loss, was 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:
		Less than 12 Months									12 Months or More							Total
	(Dollars in thousands)	Fair			Unrealized Loss			No. of Securities			Fair			Unrealized Loss			No. of Securities	Fair		Unrealized Loss
		Value									Value							Value
	March 31, 2015
	Obligations of:
	States and political subdivisions	$	5,706		$	54		10			$	214		$	8		1	$	5,920	$	62
	Residential mortgage-backed securities	108,910			1,034			31			128,705			3,603			36	237,615		4,637
	Commercial mortgage-backed securities	7,516			19			2			—			—			—	7,516		19
	Bank-issued trust preferred securities	—			—			—			2,505			493			3	2,505		493
	Equity securities	41			1			2			96			79			1	137		80
	Total	$	122,173		$	1,108		45			$	131,520		$	4,183		41	$	253,693	$	5,291
	December 31, 2014
	Obligations of:
	States and political subdivisions	$	2,602		$	12		4			$	5,788		$	47		8	$	8,390	$	59
	Residential mortgage-backed securities	114,018			1,091			21			216,224			6,773			57	330,242		7,864
	Commercial mortgage-backed securities	—			—			—			19,404			286			4	19,404		286
	Bank-issued trust preferred securities	—			—			—			2,509			490			3	2,509		490
	Equity securities	40			2			2			96			79			1	136		81
	Total	$	116,660		$	1,105		27			$	244,021		$	7,675		73	$	360,681	$	8,780
	Management systematically evaluates available-for-sale investment securities for other-than-temporary declines in fair value on a quarterly basis. At March 31, 2015, 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 March 31, 2015 and December 31, 2014, were largely attributable to changes in market interest rates and spreads since the securities were purchased.
	At March 31, 2015, approximately 99% of the 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 three positions, consisted of privately issued mortgage-backed securities with all of the underlying mortgages originated prior to 2004. Two of the three positions had a fair value less than 90% of their book value, with an aggregate book and fair value of $0.9 million and $0.6 million, 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.
	Furthermore, the three bank-issued trust preferred securities that had been in an unrealized loss position for twelve months or more at March 31, 2015 were primarily attributable to the floating nature of those investments, the current interest rate environment and spreads within that sector.
	The table below presents the amortized cost, fair value and total weighted-average yield of available-for-sale securities by contractual maturity at March 31, 2015.  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.  Rates are calculated on a fully tax-equivalent basis using a 35% federal income tax rate.
	(Dollars in thousands)	Within 1 Year			1 to 5 Years			5 to 10 Years			Over 10 Years			Total
	Amortized cost
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	—		$	—		$	—		$	—
	U.S. government sponsored agencies	—			985			—			4,366			5,351
	States and political subdivisions	275			6,432			31,498			76,570			114,775
	Residential mortgage-backed securities	—			12,206			35,513			545,185			592,904
Commercial mortgage-backed securities	—			—			22,983			4,924			27,907
Bank-issued trust preferred securities	—			—			—			6,137			6,137
Equity securities													1,548
Total available-for-sale securities	$	275		$	19,623		$	89,994		$	637,182		$	748,622
Fair value
Obligations of:
U.S. Treasury and government agencies	$	—		$	—		$	—		$	—		$	—
U.S. government sponsored agencies	—			999			—			4,489			5,488
States and political subdivisions	280			6,718			32,558			78,891			118,447
Residential mortgage-backed securities	—			12,306			36,046			548,880			597,232
Commercial mortgage-backed securities	—			—			23,197			5,044			28,241
Bank-issued trust preferred securities	—			—			—			5,649			5,649
Equity securities													5,765
Total available-for-sale securities	$	280		$	20,023		$	91,801		$	642,953		$	760,822
Total weighted-average yield	4.61		%	3.29		%	2.88		%	2.74		%	2.79		%
Held-to-Maturity
The following table summarizes Peoples’ held-to-maturity investment securities:
(Dollars in thousands)	Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
March 31, 2015
Obligations of:
States and political subdivisions	$	3,838		$	474		$	(4	)	$	4,308
Residential mortgage-backed securities	36,564			504			(233		)	36,835
Commercial mortgage-backed securities	7,643			10			(22		)	7,631
Total held-to-maturity securities	$	48,045		$	988		$	(259	)	$	48,774
December 31, 2014
Obligations of:
States and political subdivisions	$	3,841		$	448		$	(7	)	$	4,282
Residential mortgage-backed securities	36,945			189			(394		)	36,740
Commercial mortgage-backed securities	7,682			9			(271		)	7,420
Total held-to-maturity securities	$	48,468		$	646		$	(672	)	$	48,442
There were no gross gains or gross losses realized by Peoples from sales of held-to-maturity securities for the three months ended March 31, 2015 and 2014.
The following table presents a summary of held-to-maturity investment securities that had an unrealized loss:
	Less than 12 Months									12 Months or More							Total
(Dollars in thousands)	Fair			Unrealized Loss			No. of Securities			Fair			Unrealized Loss			No. of Securities	Fair		Unrealized Loss
	Value									Value							Value
March 31, 2015
Obligations of:
States and political subdivisions	$	—		$	—		—			$	324		$	4		1	$	324	$	4
Residential mortgage-backed securities	3,148			15			1			10,655			218			2	13,803		233
Commercial mortgage-backed securities	—			—			—			6,573			22			1	6,573		22
Total	$	3,148		$	15		1			$	17,552		$	244		4	$	20,700	$	259
December 31, 2014
Obligations of:
States and political subdivisions	$	—		$	—		—			$	323		$	7		1	$	323	$	7
Residential mortgage-backed securities	$	—		$	—		—			$	18,242		$	394		5	$	18,242	$	394
Commercial mortgage-backed securities	—			—			—			6,356			271			1	6,356		271
Total	$	—		$	—		—			$	24,921		$	672		7	$	24,921	$	672
The table below presents the amortized cost, fair value and total weighted-average yield of held-to-maturity securities by contractual maturity at March 31, 2015.  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.  Rates are calculated on a fully tax-equivalent basis using a 35% federal income tax rate.
(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	$	—		$	—		$	328		$	3,510		$	3,838
Residential mortgage-backed securities	—			—			503			36,061			36,564
Commercial mortgage-backed securities	—			—			—			7,643			7,643
Total held-to-maturity securities	$	—		$	—		$	831		$	47,214		$	48,045
Fair value
Obligations of:
States and political subdivisions	$	—		$	—		$	324		$	3,984		$	4,308
Residential mortgage-backed securities	—			—			508			36,327			36,835
Commercial mortgage-backed securities	—			—			—			7,631			7,631
Total held-to-maturity securities	$	—		$	—		$	832		$	47,942		$	48,774
Total weighted-average yield	—		%	—		%	2.61		%	2.78		%	2.78		%
Other Securities
Peoples' other investment securities on the Consolidated Balance Sheets consist largely of shares of the Federal Home Loan Bank of Cincinnati (the “FHLB”) and the Federal Reserve Bank of Cleveland (the "FRB").
Pledged Securities
Peoples had pledged available-for-sale investment securities with carrying values of $487.8 million and $352.8 million at March 31, 2015 and December 31, 2014, respectively, and held-to-maturity investment securities with carrying values of $22.8 million and $22.9 million at March 31, 2015 and December 31, 2014, 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 $12.9 million and $13.5 million at March 31, 2015 and December 31, 2014, respectively, and held-to-maturity securities with carrying values of $24.2 million and $24.5 million at March 31, 2015 and December 31, 2014, respectively, to secure additional borrowing capacity at the FHLB and the FRB.

Loans

Loans	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Loans	Loans
	Peoples' loan portfolio has consisted 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 northeastern Kentucky. Acquired loans consist of loans purchased in 2012 or thereafter in a business combination. The major classifications of loan balances, excluding loans held for sale, were as follows:
	(Dollars in thousands)	March 31,			December 31, 2014
		2015
	Originated loans:
	Commercial real estate, construction	$	44,276		$	37,901
	Commercial real estate, other	429,541			434,660
	Commercial real estate	473,817			472,561
	Commercial and industrial	247,103			249,975
	Residential real estate	256,551			254,169
	Home equity lines of credit	63,491			62,463
	Consumer	176,857			169,913
	Deposit account overdrafts	3,146			2,933
	Total originated loans	$	1,220,965		$	1,212,014
	Acquired Loans:
	Commercial real estate, construction	$	9,759		$	1,051
	Commercial real estate, other	317,225			121,475
	Commercial real estate	326,984			122,526
	Commercial and industrial	78,873			30,056
	Residential real estate	317,529			225,274
	Home equity lines of credit	38,222			18,232
	Consumer	13,723			12,796
	Deposit account overdrafts	—			—
	Total acquired loans	$	775,331		$	408,884
	Loans, net of deferred fees and costs	$	1,996,296		$	1,620,898
	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 loans included in the loan balances above are summarized as follows:
	(Dollars in thousands)	March 31,			December 31,
		2015			2014
	Commercial real estate	$	19,036		$	7,762
	Commercial and industrial	3,722			1,041
	Residential real estate	30,197			15,183
	Consumer	304			306
	Total outstanding balance	$	53,259		$	24,292
	Net carrying amount	$	43,210		$	19,067
	Changes in the accretable yield for the three months ended March 31, 2015 were as follows:
	(Dollars in thousands)	Accretable Yield
	Balance, December 31, 2014	$	3,172
	Additions:
	Reclassification from nonaccretable to accretable	1,112
	NB&T Financial Group, Inc.	4,783
	Accretion	(311		)
	Balance, March 31, 2015	$	8,756
	Peoples has pledged certain loans secured by 1-4 family and multifamily residential mortgages under a blanket collateral agreement to secure borrowings from the FHLB. The amount of such pledged loans totaled $447.9 million and $457.1 million at March 31, 2015 and December 31, 2014, respectively. Peoples also had pledged commercial loans to secure borrowings with the FRB. The outstanding balances of these loans totaled $140.4 million and $150.7 million at March 31, 2015 and December 31, 2014, respectively.
	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:
		Nonaccrual Loans							Loans 90+ Days Past Due and Accruing
	(Dollars in thousands)	March 31,			December 31,				March 31,			December 31,
		2015			2014				2015			2014
	Originated loans:
	Commercial real estate, construction	$	—		$	—			$	—		$	—
	Commercial real estate, other	2,128			2,575				394			—
	Commercial real estate	2,128			2,575				394			—
	Commercial and industrial	1,277			1,286				125			—
	Residential real estate	3,228			3,049				73			818
	Home equity lines of credit	432			341				34			20
	Consumer	14			19				—			2
	Total originated loans	$	7,079		$	7,270			$	626		$	840
	Acquired loans:
	Commercial real estate, construction	$	96		$	96			$	—		$	—
	Commercial real estate, other	37			9				1,752			567
	Commercial real estate	133			105				1,752			567
	Commercial and industrial	451			708				283			301
	Residential real estate	680			304				1,023			1,083
Home equity lines of credit	19			19				13			—
Consumer	—			—				3			8
Total acquired loans	$	1,283		$	1,136			$	3,074		$	1,959
Total loans	$	8,362		$	8,406			$	3,700		$	2,799
The following table presents the aging of the recorded investment in past due loans:
	Loans Past Due														Current			Total
(Dollars in thousands)	30 - 59 days			60 - 89 days			90 + Days			Total					Loans			Loans
March 31, 2015
Originated loans:
Commercial real estate, construction	$	—		$	—		$	—		$	—				$	44,276		$	44,276
Commercial real estate, other	2,926			49			1,395			4,370					425,171			429,541
Commercial real estate	2,926			49			1,395			4,370					469,447			473,817
Commercial and industrial	757			14			1,367			2,138					244,965			247,103
Residential real estate	3,737			591			927			5,255					251,296			256,551
Home equity lines of credit	113			83			274			470					63,021			63,491
Consumer	685			118			—			803					176,054			176,857
Deposit account overdrafts	23			—			—			23					3,123			3,146
Total originated loans	$	8,241		$	855		$	3,963		$	13,059				$	1,207,906		$	1,220,965
Acquired loans:
Commercial real estate, construction	$	—		$	—		$	96		$	96				$	9,663		$	9,759
Commercial real estate, other	1,634			271			1,760			3,665					313,560			317,225
Commercial real estate	1,634			271			1,856			3,761					323,223			326,984
Commercial and industrial	1,737			341			283			2,361					76,512			78,873
Residential real estate	5,341			805			1,267			7,413					310,116			317,529
Home equity lines of credit	27			19			13			59					38,163			38,222
Consumer	145			28			3			176					13,547			13,723
Deposit account overdrafts	—			—			—			—			—		—			—
Total acquired loans	$	8,884		$	1,464		$	3,422		$	13,770				$	761,561		$	775,331
Total loans	$	17,125		$	2,319		$	7,385		$	26,829				$	1,969,467		$	1,996,296
December 31, 2014
Originated loans:
Commercial real estate, construction	$	—		$	—		$	—		$	—				$	37,901		$	37,901
Commercial real estate, other	565			285			1,220			2,070					432,590			434,660
Commercial real estate	565			285			1,220			2,070					470,491			472,561
Commercial and industrial	17			18			1,245			1,280					248,695			249,975
Residential real estate	4,502			1,062			1,902			7,466					246,703			254,169
Home equity lines of credit	344			425			129			898					61,565			62,463
Consumer	1,136			157			2			1,295					168,618			169,913
Deposit account overdrafts	65			—			—			65					2,868			2,933
Total originated loans	$	6,629		$	1,947		$	4,498		$	13,074				$	1,198,940		$	1,212,014
Acquired loans:
Commercial real estate, construction	$	—		$	—		$	96		$	96				$	955		$	1,051
Commercial real estate, other	1,067			143			567			1,777					119,698			121,475
Commercial real estate	1,067			143			663			1,873					120,653			122,526
Commercial and industrial	46			6			815			867					29,189			30,056
Residential real estate	4,026			1,331			1,179			6,536					218,738			225,274
Home equity lines of credit	9			19			—			28					18,204			18,232
Consumer	245			27			8			280					12,516			12,796
Deposit account overdrafts	—			—			—			—			—		—			—
Total acquired loans	$	5,393		$	1,526		$	2,665		$	9,584				$	399,300		$	408,884
Total loans	$	12,022		$	3,473		$	7,163		$	22,658				$	1,598,240		$	1,620,898
Credit Quality Indicators
As discussed in Note 1 of the Notes to the Consolidated Financial Statements included in Peoples' 2014 Form 10-K, 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 grade would possess sufficient mitigating factors, such as adequate collateral or strong guarantors possessing the capacity to repay the loan if required, for any weakness that may exist.
“Watch” (grade 5): Loans in this risk grade are the equivalent of the regulatory definition of “Other Assets Especially Mentioned” classification. Loans in this 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 loan or in Peoples' credit position.
“Substandard” (grade 6): Loans in this risk grade are inadequately protected by the borrower's current financial condition and payment capability or of the collateral pledged, if any. Loans so classified have one or more well-defined weaknesses that jeopardize the orderly repayment of the loan. 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 grade 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, its classification as an estimate loss is deferred until its more exact status may be determined.
“Loss” (grade 8): Loans in this risk grade are considered to be non-collectible and of such little value that their continuance as bankable assets is not warranted. This does not mean the 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 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 table summarizes the risk category of Peoples' loan portfolio based upon the most recent analysis performed:
	Pass Rated			Watch			Substandard			Doubtful (Grade 7)			Not			Total
(Dollars in thousands)	(Grades 1 - 4)			(Grade 5)			(Grade 6)						Rated			Loans
March 31, 2015
Originated loans:
Commercial real estate, construction	$	44,011		$	—		$	—		$	—		$	265		$	44,276
Commercial real estate, other	401,076			12,014			16,451			—			—			429,541
Commercial real estate	445,087			12,014			16,451			—			265			473,817
Commercial and industrial	220,201			8,961			17,096			1			844			247,103
Residential real estate	21,241			1,081			13,089			237			220,903			256,551
Home equity lines of credit	763			—			762			—			61,966			63,491
Consumer	68			—			6			—			176,783			176,857
Deposit account overdrafts	—			—			—			—			3,146			3,146
Total originated loans	$	687,360		$	22,056		$	47,404		$	238		$	463,907		$	1,220,965
Acquired loans:
Commercial real estate, construction	$	9,759		$	—		$	—		$	—		$	—		$	9,759
Commercial real estate, other	282,216			18,045			16,461			503			—			317,225
Commercial real estate	291,975			18,045			16,461			503			—			326,984
Commercial and industrial	69,323			4,396			4,812			342			—			78,873
Residential real estate	19,077			1,775			836			—			295,841			317,529
Home equity lines of credit	324			—			—			—			37,898			38,222
Consumer	336			—			1			—			13,386			13,723
Deposit account overdrafts	—			—			—			—			—			—
Total acquired loans	$	381,035		$	24,216		$	22,110		$	845		$	347,125		$	775,331
Total loans	$	1,068,395		$	46,272		$	69,514		$	1,083		$	811,032		$	1,996,296
December 31, 2014
Originated loans:
Commercial real estate, construction	$	37,637		$	—		$	—		$	—		$	264		$	37,901
Commercial real estate, other	405,224			12,316			17,120			—			—			434,660
Commercial real estate	442,861			12,316			17,120			—			264			472,561
Commercial and industrial	239,168			8,122			2,684			1			—			249,975
Residential real estate	21,296			1,195			11,601			56			220,021			254,169
Home equity lines of credit	767			—			965			—			60,731			62,463
Consumer	60			1			8			—			169,844			169,913
Deposit account overdrafts	—			—			—			—			2,933			2,933
Total originated loans	$	704,152		$	21,634		$	32,378		$	57		$	453,793		$	1,212,014
Acquired loans:
Commercial real estate, construction	$	955		$	—		$	—		$	—		$	96		$	1,051
Commercial real estate, other	106,115			7,100			8,260			—			—			121,475
Commercial real estate	107,070			7,100			8,260			—			96			122,526
Commercial and industrial	27,313			255			2,294			194			—			30,056
Residential real estate	13,458			833			1,540			—			209,443			225,274
Home equity lines of credit	98			—			—			—			18,134			18,232
Consumer	279			—			—			—			12,517			12,796
Deposit account overdrafts	—			—			—			—			—			—
Total acquired loans	$	148,218		$	8,188		$	12,094		$	194		$	240,190		$	408,884
Total loans	$	852,370		$	29,822		$	44,472		$	251		$	693,983		$	1,620,898
Impaired Loans
The following table summarizes loans classified as impaired:
	Unpaid			Recorded Investment						Total						Average			Interest
	Principal			With			Without			Recorded			Related			Recorded			Income
(Dollars in thousands)	Balance			Allowance			Allowance			Investment			Allowance			Investment			Recognized
March 31, 2015
Commercial real estate, construction	$	44		$	—		$	44		$	44		$	—		$	18		$	2
Commercial real estate, other	1,762			742			786			1,528			189			675			18
Commercial real estate	1,806			$	742		$	830		$	1,572		$	189		$	693		$	20
Commercial and industrial	4,330			1,428			2,103			3,531			527			1,249			11
Residential real estate	9,895			51			9,034			9,085			9			2,996			160
Home equity lines of credit	429			—			427			427			—			156			51
Consumer	155			—			149			149			—			60			41
Total	$	16,615		$	2,221		$	12,543		$	14,764		$	725		$	5,154		$	283
December 31, 2014
Commercial real estate, construction	$	101		$	—		$	96		96			$	—		$	57		$	6
Commercial real estate, other	2,074			653			1,148			1,801			189			1,632			7
Commercial real estate	2,175			$	653		$	1,244		$	1,897		$	189		$	1,689		$	13
Commercial and industrial	2,379			1,945			399			2,344			816			493			5
Residential real estate	6,889			53			6,372			6,425			9			3,543			272
Home equity lines of credit	500			—			498			498			—			298			18
Consumer	155			—			150			150			—			109			11
Total	$	12,098		$	2,651		$	8,663		$	11,314		$	1,014		$	6,132		$	319
At March 31, 2015, Peoples' impaired loans shown in the table above included loans that were classified as troubled debt restructurings ("TDRs").
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 (i) the borrower is currently in payment default on any of the borrower's debt; (ii) a payment default is probable in the foreseeable future without the modification; (iii) the borrower has declared or is in the process of declaring bankruptcy; and (iv) 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 debt with similar risk characteristics, the significance of the modification relative to the unpaid principal balance or collateral value of the debt, 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 debt, such as (i) a reduction in the interest rate for the remaining life of the debt, (ii) an extension of the maturity date at an interest rate lower than the current market rate for new debt with similar risk, (iii) a temporary period of interest-only payments, and (iv) a reduction in the contractual payment amount for either a short period or the remaining term of the loan.
The following table summarizes the loans that were modified as a TDR during the three months ended March 31.
			Three Months Ended
			Recorded Investment (1)
	Number of Contracts		Pre-Modification			Post-Modification			Remaining Recorded Investment
31-Mar-15
Originated loans:
Commercial real estate, other	—		$	—		$	—		$	—
Residential real estate	—		—			—			—
Home equity lines of credit	5		217			217			217
Consumer	1		3			3			3
Acquired loans:
Residential real estate	4		$	419		$	419		$	419
31-Mar-14
Originated loans:
Commercial real estate, other	1		$	511		$	511		$	503
Residential real estate	8		496			497			496
Home equity lines of credit	2		47			47			47
Consumer	5		64			64			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.
The following table presents those loans for the three months ended March 31 that were modified as a TDR during the last twelve months that subsequently defaulted (i.e., 90 days or more past due following a modification).
	March 31, 2015									March 31, 2014
	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		$	51		$	—
Total	—		$	—		$	—			1		$	51		$	—
Acquired loans:
Residential real estate	—		$	—		$	—			1		$	40		$	—
Total	—		$	—		$	—			1		$	40		$	—
(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 additional commitments to lend additional funds to the related debtors whose terms have been modified in a TDR.
Allowance for Loan Losses
Changes in the allowance for loan losses in the periods ended March 31, were as follows:
(Dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Residential Real Estate			Home Equity Lines of Credit			Consumer			Deposit Account Overdrafts			Total
Balance, January 1, 2015	$	9,825		$	4,036		$	1,627		$	694		$	1,587		$	112		$	17,881
Charge-offs	(10		)	—			(186		)	(58		)	(187		)	(143		)	(584		)
Recoveries	55			12			115			15			186			58			441
Net recoveries (charge-offs)	45			12			(71		)	(43		)	(1		)	(85		)	(143		)
(Recovery of) provision for loan losses	(796		)	1,059			4			57			(74		)	100			350
Balance, March 31, 2015	$	9,074		$	5,107		$	1,560		$	708		$	1,512		$	127		$	18,088
Period-end amount allocated to:
Loans individually evaluated for impairment	$	189		$	527		$	9		$	—		$	—		$	—		$	725
Loans collectively evaluated for impairment	8,885			4,580			1,551			708			1,512			127			17,363
Ending balance	$	9,074		$	5,107		$	1,560		$	708		$	1,512		$	127		$	18,088
Balance, January 1, 2014	$	13,215		$	2,174		$	881		$	343		$	316		$	136		$	17,065
Charge-offs	—			(49		)	(137		)	(20		)	(302		)	(110		)	(618		)
Recoveries	112			5			38			6			184			70			415
Net recoveries (charge-offs)	112			(44		)	(99		)	(14		)	(118		)	(40		)	(203		)
Provision for loan losses	—			—			—			—			—			8			8
Balance, March 31, 2014	$	13,327		$	2,130		$	782		$	329		$	198		$	104		$	16,870
Period-end amount allocated to:
Loans individually evaluated for impairment	$	111		$	526		$	—		$	—		$	—		$	—		$	637
Loans collectively evaluated for impairment	13,216			1,604			782			329			198			104			16,233
Ending balance	$	13,327		$	2,130		$	782		$	329		$	198		$	104		$	16,870
The reduction in the allowance for loan losses allocated to commercial real estate, and related recovery of loan losses recorded during 2015 compared to 2014 was driven by net recoveries in recent years reducing the historical loss rates. Increases in commercial and industrial, residential real estate, home equity lines of credit and consumer categories of the allowance for loan losses, and related provision for loan losses recorded during 2015 were driven by net charge-off activity and increases in these respective loan portfolios.

LongTerm_Borrowings

Long-Term Borrowings	3 Months Ended
	Mar. 31, 2015
Long-Term Borrowings [Abstract]
Long-term Debt [Text Block]	Long-Term Borrowings
	The following table summarizes Peoples' long-term borrowings:
		March 31, 2015				December 31, 2014
	(Dollars in thousands)	Balance		Weighted-		Balance		Weighted-
				Average				Average
				Rate				Rate
	Term note payable (parent company)	$	13,174	3.5	%	$	14,369	3.5	%
	Callable national market repurchase agreements	40,000		3.63	%	40,000		3.63	%
	FHLB putable, non-amortizing, fixed rate advances	50,000		3.32	%	83,995		3.3	%
	FHLB amortizing, fixed rate advances	20,313		2.61	%	40,719		2.13	%
	Subordinated debt	6,587		1.76	%	—		—	%
	Total long-term borrowings	$	130,074	3.24	%	$	179,083	3.12	%
	On December 18, 2012, Peoples entered into a Loan Agreement (the "Loan Agreement") to obtain a $24 million unsecured term loan from an unaffiliated financial institution with an original maturity of five years. On August 4, 2014, the Loan Agreement was amended (as amended, the "Amended Loan Agreement"). Under the Amended Loan Agreement, the interest rate on the term loan was reduced from 3.80% to 3.50%, and certain loan covenants related to the operations of Peoples' business were modified under the Amended Loan Agreement. Peoples is required to make quarterly principal and interest payments until the earlier of either full prepayment by Peoples or the stated maturity date. This note may be prepaid at any time prior to maturity without penalties, so long as no default has occurred. Concurrently, Peoples also entered into a Negative Pledge Agreement that precludes Peoples from selling, transferring, assigning, mortgaging, encumbering, pledging, or entering into a negative pledge agreement with respect to or otherwise disposing of any interest in the capital stock or other ownership interests owned by Peoples in its subsidiaries without prior written approval. Peoples is also subject to certain covenants under the Amended Loan Agreement, which include restrictions on ownership interests of its subsidiaries; cash and cash equivalents; transfers of criticized, classified or nonperforming assets; additional indebtedness; certain material transactions; and other financial covenants which include:
	•	Peoples and Peoples Bank, National Association ("Peoples Bank") must maintain, as of the last day of each fiscal quarter, sufficient capital to qualify as "well capitalized" under applicable regulatory guidance;
	•	Peoples Bank must maintain a "Total Risk-Based Capital Ratio" (as defined in the Loan Agreement) equal to or in excess of 12.50%, measured as of the last day of each fiscal quarter;
	•	Peoples Bank must maintain a ratio of "Nonperforming Assets" to the sum of "Tangible Capital" plus the "Allowance for Loan Losses" (as each term is defined in the Loan Agreement) of not more than 20%, measured as of the last day of each fiscal quarter;
	•	Peoples must maintain a "Fixed Charge Coverage Ratio" (as defined in the Amended Loan Agreement) that equals or exceeds 1.25 to 1.00, commencing with the quarter ended December 31, 2012 and for each quarter thereafter, with the items used in the ratio determined on a trailing 12-month basis;
	•	issuance of dividends from Peoples Bank may not exceed the amount permitted by law without requiring regulatory approval;
	•minimum liquidity position of $2 million at Peoples; and
	•	Peoples Bank must maintain a ratio of "Allowance for Loan Losses" to "Nonperforming Loans" (as each term is defined in the Amended Loan Agreement) of not less than 70% measured as of the last day of each fiscal quarter.
	As of March 31, 2015, Peoples was in compliance with the applicable material covenants imposed by the Amended Loan Agreement.
	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 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 agreement. If the buyer exercises its option, Peoples would be required to repay the agreement in whole at the quarterly date. Peoples is required to make quarterly interest payments.
	The putable, non-amortizing, fixed rate FHLB advances have original maturities ranging from ten to twenty years that may be repaid prior to maturity, subject to termination fees. The FHLB has the option, solely at its discretion, to terminate the advance after the initial fixed rate periods ranging from three months to five years, 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 exercise by the FHLB or the stated maturity. The amortizing, fixed rate FHLB advances have a fixed rate for the term of the loan, with maturities ranging from ten to twenty 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. During the first quarter of 2015, Peoples repaid several FHLB advances including putable, non-amortizing, fixed rate advances and amortizing, fixed-rate advances, totaling approximately $52.1 million that resulted in early termination fees of $520,000, and had a weighted-average cost of 1.49%.
	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 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 Unaudited 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 Federal Reserve, the Capital Securities are redeemable prior to the maturity date of September 6, 2037, and are redeemable at par. Distributions on the Capital Securities can be deferred from time to time for a period not to exceed 20 consecutive semi-annual periods.
	The aggregate minimum annual retirements of long-term borrowings in future periods are as follows:
	(Dollars in thousands)	Balance		Weighted-Average Rate
	Nine Months Ending December 31, 2015	$	6,819	2.91	%
	Year Ending December 31, 2016	7,734		3.07	%
	Year Ending December 31, 2017	7,126		3.16	%
	Year Ending December 31, 2018	42,390		3.33	%
	Year Ending December 31, 2019	41,426		3.59	%
	Thereafter	24,579		2.69	%
	Total long-term borrowings	$	130,074	3.24	%

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2015
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity [Text Block]	Stockholders’ Equity
	The following table details the progression in Peoples’ common shares and treasury stock during the three months ended March 31, 2015:
		Common Stock		Treasury
				Stock
	Shares at December 31, 2014	15,599,643		590,246
	Changes related to stock-based compensation awards:
	Grants of restricted common shares	107,036		—
	Release of restricted common shares	—		21,636
	Exercise of stock options for common shares	—		—
	Changes related to deferred compensation plan for Boards of Directors:
	Purchase of treasury stock	—		1,256
	Reissuance of treasury stock	—		(8,125	)
	Common shares issued under dividend reinvestment plan	4,148		—
	Common shares issued under compensation plan for Board of Directors	—		(2,100	)
	Common shares issued under employee stock purchase plan	—		(3,175	)
	Issuance of common shares related to the acquisition of
	NB&T Financial Group, Inc.	3,207,698		—
	Shares at March 31, 2015	18,918,525		599,738
	On March 6, 2015, Peoples completed its acquisition of NB&T, and issued 3,207,698 common shares reflecting $76.0 million of consideration, with the remainder paid in cash. Additional information regarding the NB&T acquisition can be found in Note 10 - Acquisitions in the Notes to the Unaudited Consolidated Financial Statements included in this Form 10-Q.
	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 March 31, 2015, Peoples had no preferred shares issued or outstanding.
	Accumulated Other Comprehensive Income (Loss)
	The following table details the change in the components of Peoples’ accumulated other comprehensive income (loss) for the three months ended March 31, 2015:
	(Dollars in thousands)	Unrealized Gain on Securities			Unrecognized Net Pension and Postretirement Costs			Accumulated Other Comprehensive (Loss) Income
	Balance, December 31, 2014	$	2,542		$	(3,843	)	$	(1,301	)
	Reclassification adjustments to net income:
	Realized gain on sale of securities, net of tax	(390		)	—			(390		)
	Realized loss due to settlement and curtailment, net of tax	—			175			175
	Other comprehensive income, net of reclassifications and tax	5,775			3			5,778
	Balance, March 31, 2015	$	7,927		$	(3,665	)	$	4,262

Employee_Benefit_Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Employee Benefit Plans [Text Block]	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 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. 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 participate in a group Medicare supplemental plan. Peoples’ policy is to fund the cost of the health benefits as they arise.
	The following tables detail the components of the net periodic cost for the plans:
		Pension Benefits
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015			2014
	Interest cost	$	115		$	143
	Expected return on plan assets	(130		)	(169		)
	Amortization of net loss	33			33
	Settlement of benefit obligation	269			486
	Net periodic cost	$	287		$	493
		Postretirement Benefits
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015			2014
	Interest cost	$	1		$	1
	Amortization of net gain	(1		)	(2		)
	Net periodic benefit	$	—		$	(1	)
	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 the fair value of plan assets are required to be remeasured in order to determine the settlement gain or loss.
	In the first three months of 2015, the total lump-sum distributions made to participants caused the total settlements to exceed the recognition threshold for settlement gains or losses. As a result, Peoples remeasured its pension obligation and plan assets as of January 1, 2015 as part of the calculation of the settlement loss recognized.
	The following table summarizes the change in pension obligation and funded status as a result of this remeasurement and the aggregate settlements for the three months ended March 31, 2015:
		As of			March 31, 2015
	(Dollars in thousands)	December 31,			Before			Impact of			After
	Funded status:	2014			Settlement			Settlements			Settlements
	Projected benefit obligation	$	13,695		$	13,903		$	(625	)	$	13,278
	Fair value of plan assets	8,259			8,454			(625		)	7,829
	Funded status	$	(5,436	)	$	(5,449	)	$	—		$	(5,449	)
	Gross unrealized loss (gain)	$	5,979		$	5,974		$	(269	)	$	5,705
	Assumptions:
	Discount rate	3.5		%	3.4		%				3.4		%
	Expected return on plan assets	7.5		%	7.5		%				7.5		%

Earnings_Per_Common_Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Common Share	(Loss) Earnings Per Common Share
	The calculations of basic and diluted (loss) earnings per common share were as follows:
		Three Months Ended
		March 31,
	(Dollars in thousands, except per share data)	2015			2014
	Distributed earnings allocated to common shareholders	$	2,243		$	1,605
	Undistributed (loss) earnings allocated to common shareholders	(2,941		)	3,146
	Net (loss) earnings allocated to common shareholders	$	(698	)	$	4,751
	Weighted-average common shares outstanding	15,802,334			10,636,089
	Effect of potentially dilutive common shares	127,901			104,795
	Total weighted-average diluted common shares outstanding	15,930,235			10,740,884
	(Loss) Earnings per common share:
	Basic	$	(0.04	)	$	0.45
	Diluted	$	(0.04	)	$	0.44
	Anti-dilutive shares excluded from calculation:
	Stock options and SARs	42,584			73,422

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2015
Share-based Compensation [Abstract]
Stock-Based Compensation	Stock-Based Compensation
	Under the Peoples Bancorp Inc. Second Amended and Restated 2006 Equity Plan (the “2006 Equity Plan”), Peoples may grant, among other awards, nonqualified stock options, incentive stock options, restricted stock awards, stock appreciation rights and unrestricted share awards to employees and non-employee directors. The total number of common shares available under the 2006 Equity Plan is 1,081,260.  The maximum number of common shares that can be issued for incentive stock options is 800,000 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.  Since February 2007, Peoples has granted a combination of restricted common shares and stock appreciation rights (“SARs”) to be settled in common shares to employees and restricted common shares to non-employee directors subject to the terms and conditions prescribed by the 2006 Equity Plan. 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 Options
	Under the provisions of the 2006 Equity Plan and predecessor stock option plans, the exercise price per share of any stock option granted may not be less than the grant date fair market value of the underlying common shares.  All stock options granted to both employees and non-employee directors expire ten years from the date of grant. The most recent stock option grants to employees and non-employee directors occurred in 2006.  The stock options granted to employees vested three years after the grant date, while the stock options granted to non-employee directors vested six months after the grant date.
	The following table summarizes the changes to Peoples' stock options for the three months ended March 31, 2015:
			Number of Common Shares Subject to Options			Weighted-Average Exercise Price			Weighted-Average Remaining Contractual Life		Aggregate Intrinsic Value
	Outstanding at January 1		38,577			$	28.09
	Expired		8,482			27.38
	Outstanding at March 31		30,095			$	28.29		0.8 years		$	—
	Exercisable at March 31		30,095			$	28.29		0.8 years		$	—
	The following table summarizes Peoples’ stock options outstanding at March 31, 2015:
				Options Outstanding & Exercisable
	Range of Exercise Prices			Common Shares Subject to Options Outstanding & Exercisable		Weighted-Average Remaining Contractual Life	Weighted-Average
							Exercise Price
	$26.01	to	$27.74	5,198		0.0 years	$	26.01
	$28.25	to	$28.26	13,697		0.9 years	28.25
	$28.57	to	$30.00	11,200		1.1 years	29.4
	Total			30,095		0.8 years	$	28.29
	Stock Appreciation Rights
	SARs granted to employees have an exercise price equal to the fair market value of Peoples’ common shares on the date of grant and will be settled using common shares of Peoples.  Additionally, the SARs granted to employees vested three years after the grant date and are to expire ten years from the date of grant. The most recent grant of SARs occurred in 2008. The following table summarizes the changes to Peoples' SARs for the three months ended March 31, 2015:
			Number of Common Shares Subject to SARs			Weighted-			Weighted-Average Remaining Contractual Life		Aggregate Intrinsic
						Average					Value
						Exercise
						Price
	Outstanding at January 1		21,292			$	25.96
	Outstanding at March 31		21,292			$	25.96		2.3 years		$	1,000
	Exercisable at March 31		21,292			$	25.96		2.3 years		$	1,000
	The following table summarizes Peoples’ SARs outstanding at March 31, 2015:
	Exercise Price	Number of Common Shares Subject to SARs Outstanding & Exercisable		Weighted-
				Average Remaining Contractual
				Life
	$23.26	2,000		2.3 years
	$23.77	10,582		2.7 years
	$29.25	8,710		1.8 years
	Total	21,292		2.3 years
	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 non-employee directors expire after six months, while the restrictions on restricted common shares awarded to employees expire after periods ranging from one to three years. In the first quarter of 2015, Peoples granted 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, 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.
	The following table summarizes the changes to Peoples’ restricted common shares for the three months ended March 31, 2015:
		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	47,591		$	19.48			125,079	$	21.73
	Awarded	—		—				107,961	23.63
	Released	23,712		15.7				49,058	21.74
	Forfeited	500		15.64				425	21.79
	Outstanding at March 31	23,379		$	23.39			183,557	$	22.84
	For the three months ended March 31, 2015, the total intrinsic value of restricted common shares released was $1.7 million.
	Stock-Based Compensation
	Peoples recognized stock-based compensation expense, which is included as a component of Peoples’ salaries and employee benefit costs, based on the estimated fair value of the awards on the grant date.  The following table summarizes the amount of stock-based compensation expense and related tax benefit recognized:
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015			2014
	Total stock-based compensation	$	565		$	490
	Recognized tax benefit	(198		)	(172		)
	Net expense recognized	$	367		$	318
	Total unrecognized stock-based compensation expense related to unvested awards was $2.8 million at March 31, 2015, which will be recognized over a weighted-average period of 2.4 years.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Acquisitions	Note 10. Acquisitions
	As of the close of business on March 6, 2015, Peoples completed its acquisition of NB&T for total consideration of $102.7 million which reflected the conversion of each of the 3,442,329 outstanding NB&T common shares into $7.75 in cash and 0.9319 in Peoples' common shares. NB&T merged into Peoples and NB&T's wholly-owned subsidiary, The National Bank and Trust Company, which operates 22 full-service branches in southwest Ohio, merged into Peoples Bank. The acquisition was accounted for as a business combination under the acquisition method of accounting under US GAAP. The assets purchased, liabilities assumed, and related identifiable intangible assets were recorded at their acquisition date fair values. Per the applicable accounting guidance for business combinations, these fair values 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 goodwill recognized will not be deductible for income tax purposes.
	As a result of the NB&T acquisition, Peoples acquired loans of $390.0 million and deposits of $629.5 million after preliminary acquisition accounting adjustments. The balances and operations related to the acquisition are included in Peoples' Unaudited Consolidated Financial Statements from the date of the acquisition.
	The following table provides the preliminary purchase price calculation as of the date of acquisition for NB&T, and the assets acquired and liabilities assumed at their estimated fair values.
	(Dollars in thousands, except per share data)	NB&T
	Purchase Price
	Common shares outstanding of acquired company at acquisition date	3,442,329
	Cash purchase price per share	$	7.75
	Cash consideration	26,678
	Number of common shares of Peoples issued for each common share of acquired company	0.9319
	Price per Peoples common share, based on closing stock price on acquisition date	$	23.7
	Common share consideration	76,027
	Total purchase price	$	102,705
	Net Assets at Fair Value
	Assets
	Cash and cash equivalents	$	130,275
	Investment securities	156,392
	Loans, including loans held for sale, net of deferred fees and costs	389,985
	Bank premises and equipment, net	10,702
	Other intangible assets	8,868
	Other assets	24,070
	Total assets	720,292
	Liabilities
	Deposits	629,512
	Borrowings	6,570
	Accrued expenses and other liabilities	7,603
	Total liabilities	643,685
	Net assets	$	76,607
	Goodwill	$	26,098
	Acquired loans are reported net of the unamortized fair value adjustment. The following table details the preliminary fair value adjustment for acquired loans as of the acquisition date:
	(Dollars in thousands, except per share data)	NB&T
	Nonimpaired Loans
	Contractual cash flows	$	541,292
	Nonaccretable difference	76,853
	Expected cash flows	464,439
	Accretable yield	99,678
	Fair value	$	364,761
	Purchase Credit Impaired Loans
	Contractual cash flows	$	44,936
	Nonaccretable difference	14,929
	Expected cash flows	30,007
	Accretable yield	4,783
	Fair value	$	25,224
	Peoples recorded non-interest expenses related to acquisitions, mainly the NB&T acquisition, of $9.0 million and net losses on asset disposals related to the NB&T acquisition of $0.6 million in the Consolidated Statement of Operations for the three months ended March 31, 2015.
	The following table is a preliminary summary of the changes in goodwill and intangible assets during the period ended March 31, 2015:
	(Dollars in thousands)	Goodwill		Gross Core Deposits			Gross Customer Relationships
	Balance, December 31, 2014	$	98,562	$	13,546		$	8,859
	Acquired intangible assets	26,098		8,623			—
	Balance, March 31, 2015	$	124,660	$	22,169		$	8,859
	(Dollars in thousands)	Gross Intangible Assets		Accumulated Amortization			Net Intangible Assets
	31-Mar-15
	Core deposits	$	22,169	$	(8,232	)	$	13,937
	Customer relationships	8,859		(6,488		)	2,371
	Total acquired intangible assets	$	31,028	$	(14,720	)	$	16,308
	Servicing rights						2,469
	Total other intangible assets						$	18,777

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
New Accounting Pronouncements [Policy Text Block]	New Accounting Pronouncements: From time to time, new accounting pronouncements are issued by 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.

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Assets Measured at Fair Value on a Recurring Basis	Available-for-sale securities measured at fair value on a recurring basis comprised the following:
				Fair Value Measurements at Reporting Date Using
	(Dollars in thousands)			Quoted Prices in Active Markets for Identical Assets		Significant			Significant Unobservable Inputs
				(Level 1)		Other			(Level 3)
						Observable
						Inputs
		Fair Value				(Level 2)
	March 31, 2015
	Obligations of:
	U.S. Treasury and government agencies	$	—	$	—	$	—		$	—
	U.S. government sponsored agencies	5,488		—		5,488			—
	States and political subdivisions	118,447		—		118,447			—
	Residential mortgage-backed securities	597,232		6,439		590,793			—
	Commercial mortgage-backed securities	28,241		—		28,241			—
	Bank-issued trust preferred securities	5,649		—		5,649			—
	Equity securities	5,765		5,562		203			—
	Total available-for-sale securities	$	760,822	$	12,001	$	748,821		$	—
	December 31, 2014
	Obligations of:
	U.S. Treasury and government agencies	$	1	$	—	$	1		$	—
	U.S. government sponsored agencies	5,950		—		5,950			—
	States and political subdivisions	64,743		—		64,743			—
	Residential mortgage-backed securities	527,291		—		527,291			—
	Commercial mortgage-backed securities	27,847		—		27,847			—
	Bank-issued trust preferred securities	5,645		—		5,645			—
	Equity securities	5,403		5,204		199			—
	Total available-for-sale securities	$	636,880	$	5,204	$	631,676		$	—
Fair Value Amounts Disclosured [Table Text Block]	Held-to-maturity securities reported at fair value comprised the following:
				Fair Value at Reporting Date Using
	(Dollars in thousands)			Quoted Prices in Active Markets for Identical Assets		Significant			Significant Unobservable Inputs
						Other
						Observable
						Inputs
		Fair Value		(Level 1)		(Level 2)			(Level 3)
	March 31, 2015
	Obligations of:
	States and political subdivisions	$	4,308	$	—	$	4,308		$	—
	Residential mortgage-backed securities	36,835		—		36,835			—
	Commercial mortgage-backed securities	7,631		—		7,631			—
	Total held-to-maturity securities	$	48,774	$	—	$	48,774		$	—
	December 31, 2014
	Obligations of:
	States and political subdivisions	$	4,282	$	—	$	4,282		$	—
	Residential mortgage-backed securities	36,740		—		36,740			—
	Commercial mortgage-backed securities	7,420		—		7,420			—
	Total held-to-maturity securities	$	48,442	$	—	$	48,442		$	—
Fair Values of Financial Assets and Liabilities on Balance Sheets	The following table presents the fair values of financial assets and liabilities carried on Peoples’ Consolidated Balance Sheets, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis:
		March 31, 2015					December 31, 2014
	(Dollars in thousands)	Carrying Amount		Fair Value			Carrying Amount			Fair Value
	Financial assets:
	Cash and cash equivalents	$	166,402	$	166,402		$	61,454		$	61,454
	Investment securities	845,118		845,847			713,659			713,633
	Loans	1,983,247		1,950,086			1,607,391			1,581,813
	Financial liabilities:
	Deposits	$	2,581,136	$	2,586,216		$	1,933,074		$	1,938,021
	Short-term borrowings	91,101		91,101			88,277			88,277
	Long-term borrowings	130,074		135,516			179,083			183,878

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investment Holdings [Line Items]
Summary of Available-for-sale Investment Securities	The following table summarizes Peoples’ available-for-sale investment securities:
	(Dollars in thousands)	Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
	March 31, 2015
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	—		$	—		$	—
	U.S. government sponsored agencies	5,351			137			—			5,488
	States and political subdivisions	114,775			3,734			(62		)	118,447
	Residential mortgage-backed securities	592,904			8,965			(4,637		)	597,232
	Commercial mortgage-backed securities	27,907			353			(19		)	28,241
	Bank-issued trust preferred securities	6,137			5			(493		)	5,649
	Equity securities	1,548			4,297			(80		)	5,765
	Total available-for-sale securities	$	748,622		$	17,491		$	(5,291	)	$	760,822
	December 31, 2014
	Obligations of:
	U.S. Treasury and government agencies	$	1		$	—		$	—		$	1
	U.S. government sponsored agencies	5,836			114			—			5,950
	States and political subdivisions	62,292			2,510			(59		)	64,743
	Residential mortgage-backed securities	529,245			5,910			(7,864		)	527,291
	Commercial mortgage-backed securities	28,021			112			(286		)	27,847
	Bank-issued trust preferred securities	6,132			3			(490		)	5,645
	Equity securities	1,440			4,044			(81		)	5,403
	Total available-for-sale securities	$	632,967		$	12,693		$	(8,780	)	$	636,880
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 periods ended March 31 were as follows:
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015			2014
	Gross gains realized	$	600		$	514
	Gross losses realized	—			544
	Net gain (loss) realized	$	600		$	(30	)
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:
		Less than 12 Months									12 Months or More							Total
	(Dollars in thousands)	Fair			Unrealized Loss			No. of Securities			Fair			Unrealized Loss			No. of Securities	Fair		Unrealized Loss
		Value									Value							Value
	March 31, 2015
	Obligations of:
	States and political subdivisions	$	5,706		$	54		10			$	214		$	8		1	$	5,920	$	62
	Residential mortgage-backed securities	108,910			1,034			31			128,705			3,603			36	237,615		4,637
	Commercial mortgage-backed securities	7,516			19			2			—			—			—	7,516		19
	Bank-issued trust preferred securities	—			—			—			2,505			493			3	2,505		493
	Equity securities	41			1			2			96			79			1	137		80
	Total	$	122,173		$	1,108		45			$	131,520		$	4,183		41	$	253,693	$	5,291
	December 31, 2014
	Obligations of:
	States and political subdivisions	$	2,602		$	12		4			$	5,788		$	47		8	$	8,390	$	59
	Residential mortgage-backed securities	114,018			1,091			21			216,224			6,773			57	330,242		7,864
	Commercial mortgage-backed securities	—			—			—			19,404			286			4	19,404		286
	Bank-issued trust preferred securities	—			—			—			2,509			490			3	2,509		490
	Equity securities	40			2			2			96			79			1	136		81
	Total	$	116,660		$	1,105		27			$	244,021		$	7,675		73	$	360,681	$	8,780
Summary of Held-to-maturity Investment Securities	The following table summarizes Peoples’ held-to-maturity investment securities:
	(Dollars in thousands)	Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
	March 31, 2015
	Obligations of:
	States and political subdivisions	$	3,838		$	474		$	(4	)	$	4,308
	Residential mortgage-backed securities	36,564			504			(233		)	36,835
	Commercial mortgage-backed securities	7,643			10			(22		)	7,631
	Total held-to-maturity securities	$	48,045		$	988		$	(259	)	$	48,774
	December 31, 2014
	Obligations of:
	States and political subdivisions	$	3,841		$	448		$	(7	)	$	4,282
	Residential mortgage-backed securities	36,945			189			(394		)	36,740
	Commercial mortgage-backed securities	7,682			9			(271		)	7,420
	Total held-to-maturity securities	$	48,468		$	646		$	(672	)	$	48,442
Available-for-sale securities
Investment Holdings [Line Items]
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 March 31, 2015.  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.  Rates are calculated on a fully tax-equivalent basis using a 35% federal income tax rate.
	(Dollars in thousands)	Within 1 Year			1 to 5 Years			5 to 10 Years			Over 10 Years			Total
	Amortized cost
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	—		$	—		$	—		$	—
	U.S. government sponsored agencies	—			985			—			4,366			5,351
	States and political subdivisions	275			6,432			31,498			76,570			114,775
	Residential mortgage-backed securities	—			12,206			35,513			545,185			592,904
	Commercial mortgage-backed securities	—			—			22,983			4,924			27,907
	Bank-issued trust preferred securities	—			—			—			6,137			6,137
	Equity securities													1,548
	Total available-for-sale securities	$	275		$	19,623		$	89,994		$	637,182		$	748,622
	Fair value
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	—		$	—		$	—		$	—
	U.S. government sponsored agencies	—			999			—			4,489			5,488
	States and political subdivisions	280			6,718			32,558			78,891			118,447
	Residential mortgage-backed securities	—			12,306			36,046			548,880			597,232
	Commercial mortgage-backed securities	—			—			23,197			5,044			28,241
	Bank-issued trust preferred securities	—			—			—			5,649			5,649
	Equity securities													5,765
	Total available-for-sale securities	$	280		$	20,023		$	91,801		$	642,953		$	760,822
	Total weighted-average yield	4.61		%	3.29		%	2.88		%	2.74		%	2.79		%
Held-to-maturity securities
Investment Holdings [Line Items]
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:
		Less than 12 Months									12 Months or More							Total
	(Dollars in thousands)	Fair			Unrealized Loss			No. of Securities			Fair			Unrealized Loss			No. of Securities	Fair		Unrealized Loss
		Value									Value							Value
	March 31, 2015
	Obligations of:
	States and political subdivisions	$	—		$	—		—			$	324		$	4		1	$	324	$	4
	Residential mortgage-backed securities	3,148			15			1			10,655			218			2	13,803		233
	Commercial mortgage-backed securities	—			—			—			6,573			22			1	6,573		22
	Total	$	3,148		$	15		1			$	17,552		$	244		4	$	20,700	$	259
	December 31, 2014
	Obligations of:
	States and political subdivisions	$	—		$	—		—			$	323		$	7		1	$	323	$	7
	Residential mortgage-backed securities	$	—		$	—		—			$	18,242		$	394		5	$	18,242	$	394
	Commercial mortgage-backed securities	—			—			—			6,356			271			1	6,356		271
	Total	$	—		$	—		—			$	24,921		$	672		7	$	24,921	$	672
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 March 31, 2015.  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.  Rates are calculated on a fully tax-equivalent basis using a 35% federal income tax rate.
	(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	$	—		$	—		$	328		$	3,510		$	3,838
	Residential mortgage-backed securities	—			—			503			36,061			36,564
	Commercial mortgage-backed securities	—			—			—			7,643			7,643
	Total held-to-maturity securities	$	—		$	—		$	831		$	47,214		$	48,045
	Fair value
	Obligations of:
	States and political subdivisions	$	—		$	—		$	324		$	3,984		$	4,308
	Residential mortgage-backed securities	—			—			508			36,327			36,835
	Commercial mortgage-backed securities	—			—			—			7,631			7,631
	Total held-to-maturity securities	$	—		$	—		$	832		$	47,942		$	48,774
	Total weighted-average yield	—		%	—		%	2.61		%	2.78		%	2.78		%

Loans_Tables

Loans (Tables)	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Schedule of Financing Receivables, Type	The major classifications of loan balances, excluding loans held for sale, were as follows:
	(Dollars in thousands)	March 31,			December 31, 2014
		2015
	Originated loans:
	Commercial real estate, construction	$	44,276		$	37,901
	Commercial real estate, other	429,541			434,660
	Commercial real estate	473,817			472,561
	Commercial and industrial	247,103			249,975
	Residential real estate	256,551			254,169
	Home equity lines of credit	63,491			62,463
	Consumer	176,857			169,913
	Deposit account overdrafts	3,146			2,933
	Total originated loans	$	1,220,965		$	1,212,014
	Acquired Loans:
	Commercial real estate, construction	$	9,759		$	1,051
	Commercial real estate, other	317,225			121,475
	Commercial real estate	326,984			122,526
	Commercial and industrial	78,873			30,056
	Residential real estate	317,529			225,274
	Home equity lines of credit	38,222			18,232
	Consumer	13,723			12,796
	Deposit account overdrafts	—			—
	Total acquired loans	$	775,331		$	408,884
	Loans, net of deferred fees and costs	$	1,996,296		$	1,620,898
Schedule of Financing Receivables Acquired with Deteriorated Credit Quality	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 loans included in the loan balances above are summarized as follows:
	(Dollars in thousands)	March 31,			December 31,
		2015			2014
	Commercial real estate	$	19,036		$	7,762
	Commercial and industrial	3,722			1,041
	Residential real estate	30,197			15,183
	Consumer	304			306
	Total outstanding balance	$	53,259		$	24,292
	Net carrying amount	$	43,210		$	19,067
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:
		Nonaccrual Loans							Loans 90+ Days Past Due and Accruing
	(Dollars in thousands)	March 31,			December 31,				March 31,			December 31,
		2015			2014				2015			2014
	Originated loans:
	Commercial real estate, construction	$	—		$	—			$	—		$	—
	Commercial real estate, other	2,128			2,575				394			—
	Commercial real estate	2,128			2,575				394			—
	Commercial and industrial	1,277			1,286				125			—
	Residential real estate	3,228			3,049				73			818
	Home equity lines of credit	432			341				34			20
	Consumer	14			19				—			2
	Total originated loans	$	7,079		$	7,270			$	626		$	840
	Acquired loans:
	Commercial real estate, construction	$	96		$	96			$	—		$	—
	Commercial real estate, other	37			9				1,752			567
	Commercial real estate	133			105				1,752			567
	Commercial and industrial	451			708				283			301
	Residential real estate	680			304				1,023			1,083
	Home equity lines of credit	19			19				13			—
	Consumer	—			—				3			8
	Total acquired loans	$	1,283		$	1,136			$	3,074		$	1,959
	Total loans	$	8,362		$	8,406			$	3,700		$	2,799
Aging Of The Recorded Investment In Past Due Loans And Leases	The following table presents the aging of the recorded investment in past due loans:
		Loans Past Due														Current			Total
	(Dollars in thousands)	30 - 59 days			60 - 89 days			90 + Days			Total					Loans			Loans
	March 31, 2015
	Originated loans:
	Commercial real estate, construction	$	—		$	—		$	—		$	—				$	44,276		$	44,276
	Commercial real estate, other	2,926			49			1,395			4,370					425,171			429,541
	Commercial real estate	2,926			49			1,395			4,370					469,447			473,817
	Commercial and industrial	757			14			1,367			2,138					244,965			247,103
	Residential real estate	3,737			591			927			5,255					251,296			256,551
	Home equity lines of credit	113			83			274			470					63,021			63,491
	Consumer	685			118			—			803					176,054			176,857
	Deposit account overdrafts	23			—			—			23					3,123			3,146
	Total originated loans	$	8,241		$	855		$	3,963		$	13,059				$	1,207,906		$	1,220,965
	Acquired loans:
	Commercial real estate, construction	$	—		$	—		$	96		$	96				$	9,663		$	9,759
	Commercial real estate, other	1,634			271			1,760			3,665					313,560			317,225
	Commercial real estate	1,634			271			1,856			3,761					323,223			326,984
	Commercial and industrial	1,737			341			283			2,361					76,512			78,873
	Residential real estate	5,341			805			1,267			7,413					310,116			317,529
	Home equity lines of credit	27			19			13			59					38,163			38,222
	Consumer	145			28			3			176					13,547			13,723
	Deposit account overdrafts	—			—			—			—			—		—			—
	Total acquired loans	$	8,884		$	1,464		$	3,422		$	13,770				$	761,561		$	775,331
	Total loans	$	17,125		$	2,319		$	7,385		$	26,829				$	1,969,467		$	1,996,296
	December 31, 2014
	Originated loans:
	Commercial real estate, construction	$	—		$	—		$	—		$	—				$	37,901		$	37,901
	Commercial real estate, other	565			285			1,220			2,070					432,590			434,660
	Commercial real estate	565			285			1,220			2,070					470,491			472,561
	Commercial and industrial	17			18			1,245			1,280					248,695			249,975
	Residential real estate	4,502			1,062			1,902			7,466					246,703			254,169
	Home equity lines of credit	344			425			129			898					61,565			62,463
	Consumer	1,136			157			2			1,295					168,618			169,913
	Deposit account overdrafts	65			—			—			65					2,868			2,933
	Total originated loans	$	6,629		$	1,947		$	4,498		$	13,074				$	1,198,940		$	1,212,014
	Acquired loans:
	Commercial real estate, construction	$	—		$	—		$	96		$	96				$	955		$	1,051
	Commercial real estate, other	1,067			143			567			1,777					119,698			121,475
	Commercial real estate	1,067			143			663			1,873					120,653			122,526
	Commercial and industrial	46			6			815			867					29,189			30,056
	Residential real estate	4,026			1,331			1,179			6,536					218,738			225,274
	Home equity lines of credit	9			19			—			28					18,204			18,232
	Consumer	245			27			8			280					12,516			12,796
	Deposit account overdrafts	—			—			—			—			—		—			—
	Total acquired loans	$	5,393		$	1,526		$	2,665		$	9,584				$	399,300		$	408,884
	Total loans	$	12,022		$	3,473		$	7,163		$	22,658				$	1,598,240		$	1,620,898
Loans By Risk Category	The following table summarizes the risk category of Peoples' loan portfolio based upon the most recent analysis performed:
		Pass Rated			Watch			Substandard			Doubtful (Grade 7)			Not			Total
	(Dollars in thousands)	(Grades 1 - 4)			(Grade 5)			(Grade 6)						Rated			Loans
	March 31, 2015
	Originated loans:
	Commercial real estate, construction	$	44,011		$	—		$	—		$	—		$	265		$	44,276
	Commercial real estate, other	401,076			12,014			16,451			—			—			429,541
	Commercial real estate	445,087			12,014			16,451			—			265			473,817
	Commercial and industrial	220,201			8,961			17,096			1			844			247,103
	Residential real estate	21,241			1,081			13,089			237			220,903			256,551
	Home equity lines of credit	763			—			762			—			61,966			63,491
	Consumer	68			—			6			—			176,783			176,857
	Deposit account overdrafts	—			—			—			—			3,146			3,146
	Total originated loans	$	687,360		$	22,056		$	47,404		$	238		$	463,907		$	1,220,965
	Acquired loans:
	Commercial real estate, construction	$	9,759		$	—		$	—		$	—		$	—		$	9,759
	Commercial real estate, other	282,216			18,045			16,461			503			—			317,225
	Commercial real estate	291,975			18,045			16,461			503			—			326,984
	Commercial and industrial	69,323			4,396			4,812			342			—			78,873
	Residential real estate	19,077			1,775			836			—			295,841			317,529
	Home equity lines of credit	324			—			—			—			37,898			38,222
	Consumer	336			—			1			—			13,386			13,723
	Deposit account overdrafts	—			—			—			—			—			—
	Total acquired loans	$	381,035		$	24,216		$	22,110		$	845		$	347,125		$	775,331
	Total loans	$	1,068,395		$	46,272		$	69,514		$	1,083		$	811,032		$	1,996,296
	December 31, 2014
	Originated loans:
	Commercial real estate, construction	$	37,637		$	—		$	—		$	—		$	264		$	37,901
	Commercial real estate, other	405,224			12,316			17,120			—			—			434,660
	Commercial real estate	442,861			12,316			17,120			—			264			472,561
	Commercial and industrial	239,168			8,122			2,684			1			—			249,975
	Residential real estate	21,296			1,195			11,601			56			220,021			254,169
	Home equity lines of credit	767			—			965			—			60,731			62,463
	Consumer	60			1			8			—			169,844			169,913
	Deposit account overdrafts	—			—			—			—			2,933			2,933
	Total originated loans	$	704,152		$	21,634		$	32,378		$	57		$	453,793		$	1,212,014
	Acquired loans:
	Commercial real estate, construction	$	955		$	—		$	—		$	—		$	96		$	1,051
	Commercial real estate, other	106,115			7,100			8,260			—			—			121,475
	Commercial real estate	107,070			7,100			8,260			—			96			122,526
	Commercial and industrial	27,313			255			2,294			194			—			30,056
	Residential real estate	13,458			833			1,540			—			209,443			225,274
	Home equity lines of credit	98			—			—			—			18,134			18,232
	Consumer	279			—			—			—			12,517			12,796
	Deposit account overdrafts	—			—			—			—			—			—
	Total acquired loans	$	148,218		$	8,188		$	12,094		$	194		$	240,190		$	408,884
	Total loans	$	852,370		$	29,822		$	44,472		$	251		$	693,983		$	1,620,898
Schedule Of Impaired Loans	The following table summarizes loans classified as impaired:
		Unpaid			Recorded Investment						Total						Average			Interest
		Principal			With			Without			Recorded			Related			Recorded			Income
	(Dollars in thousands)	Balance			Allowance			Allowance			Investment			Allowance			Investment			Recognized
	March 31, 2015
	Commercial real estate, construction	$	44		$	—		$	44		$	44		$	—		$	18		$	2
	Commercial real estate, other	1,762			742			786			1,528			189			675			18
	Commercial real estate	1,806			$	742		$	830		$	1,572		$	189		$	693		$	20
	Commercial and industrial	4,330			1,428			2,103			3,531			527			1,249			11
	Residential real estate	9,895			51			9,034			9,085			9			2,996			160
	Home equity lines of credit	429			—			427			427			—			156			51
	Consumer	155			—			149			149			—			60			41
	Total	$	16,615		$	2,221		$	12,543		$	14,764		$	725		$	5,154		$	283
	December 31, 2014
	Commercial real estate, construction	$	101		$	—		$	96		96			$	—		$	57		$	6
	Commercial real estate, other	2,074			653			1,148			1,801			189			1,632			7
	Commercial real estate	2,175			$	653		$	1,244		$	1,897		$	189		$	1,689		$	13
	Commercial and industrial	2,379			1,945			399			2,344			816			493			5
	Residential real estate	6,889			53			6,372			6,425			9			3,543			272
	Home equity lines of credit	500			—			498			498			—			298			18
	Consumer	155			—			150			150			—			109			11
	Total	$	12,098		$	2,651		$	8,663		$	11,314		$	1,014		$	6,132		$	319
Troubled Debt Restructurings on Financing Receivables	The following table summarizes the loans that were modified as a TDR during the three months ended March 31.
				Three Months Ended
				Recorded Investment (1)
		Number of Contracts		Pre-Modification			Post-Modification			Remaining Recorded Investment
	31-Mar-15
	Originated loans:
	Commercial real estate, other	—		$	—		$	—		$	—
	Residential real estate	—		—			—			—
	Home equity lines of credit	5		217			217			217
	Consumer	1		3			3			3
	Acquired loans:
	Residential real estate	4		$	419		$	419		$	419
	31-Mar-14
	Originated loans:
	Commercial real estate, other	1		$	511		$	511		$	503
	Residential real estate	8		496			497			496
	Home equity lines of credit	2		47			47			47
	Consumer	5		64			64			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.
Summary Of Activity In Allowance For Loan And Lease Losses	Changes in the allowance for loan losses in the periods ended March 31, were as follows:
	(Dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Residential Real Estate			Home Equity Lines of Credit			Consumer			Deposit Account Overdrafts			Total
	Balance, January 1, 2015	$	9,825		$	4,036		$	1,627		$	694		$	1,587		$	112		$	17,881
	Charge-offs	(10		)	—			(186		)	(58		)	(187		)	(143		)	(584		)
	Recoveries	55			12			115			15			186			58			441
	Net recoveries (charge-offs)	45			12			(71		)	(43		)	(1		)	(85		)	(143		)
	(Recovery of) provision for loan losses	(796		)	1,059			4			57			(74		)	100			350
	Balance, March 31, 2015	$	9,074		$	5,107		$	1,560		$	708		$	1,512		$	127		$	18,088
	Period-end amount allocated to:
	Loans individually evaluated for impairment	$	189		$	527		$	9		$	—		$	—		$	—		$	725
	Loans collectively evaluated for impairment	8,885			4,580			1,551			708			1,512			127			17,363
	Ending balance	$	9,074		$	5,107		$	1,560		$	708		$	1,512		$	127		$	18,088
	Balance, January 1, 2014	$	13,215		$	2,174		$	881		$	343		$	316		$	136		$	17,065
	Charge-offs	—			(49		)	(137		)	(20		)	(302		)	(110		)	(618		)
	Recoveries	112			5			38			6			184			70			415
	Net recoveries (charge-offs)	112			(44		)	(99		)	(14		)	(118		)	(40		)	(203		)
	Provision for loan losses	—			—			—			—			—			8			8
	Balance, March 31, 2014	$	13,327		$	2,130		$	782		$	329		$	198		$	104		$	16,870
	Period-end amount allocated to:
	Loans individually evaluated for impairment	$	111		$	526		$	—		$	—		$	—		$	—		$	637
	Loans collectively evaluated for impairment	13,216			1,604			782			329			198			104			16,233
	Ending balance	$	13,327		$	2,130		$	782		$	329		$	198		$	104		$	16,870
Troubled Debt Restructurings during prior 12 months that subsequently defaulted [Table Text Block]	The following table presents those loans for the three months ended March 31 that were modified as a TDR during the last twelve months that subsequently defaulted (i.e., 90 days or more past due following a modification).
		March 31, 2015									March 31, 2014
		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		$	51		$	—
	Total	—		$	—		$	—			1		$	51		$	—
	Acquired loans:
	Residential real estate	—		$	—		$	—			1		$	40		$	—
	Total	—		$	—		$	—			1		$	40		$	—
	(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.
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield [Table Text Block]	Changes in the accretable yield for the three months ended March 31, 2015 were as follows:
	(Dollars in thousands)	Accretable Yield
	Balance, December 31, 2014	$	3,172
	Additions:
	Reclassification from nonaccretable to accretable	1,112
	NB&T Financial Group, Inc.	4,783
	Accretion	(311		)
	Balance, March 31, 2015	$	8,756

LongTerm_Borrowings_Tables

Long-Term Borrowings (Tables)	3 Months Ended
	Mar. 31, 2015
Long-Term Borrowings [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	The following table summarizes Peoples' long-term borrowings:
		March 31, 2015				December 31, 2014
	(Dollars in thousands)	Balance		Weighted-		Balance		Weighted-
				Average				Average
				Rate				Rate
	Term note payable (parent company)	$	13,174	3.5	%	$	14,369	3.5	%
	Callable national market repurchase agreements	40,000		3.63	%	40,000		3.63	%
	FHLB putable, non-amortizing, fixed rate advances	50,000		3.32	%	83,995		3.3	%
	FHLB amortizing, fixed rate advances	20,313		2.61	%	40,719		2.13	%
	Subordinated debt	6,587		1.76	%	—		—	%
	Total long-term borrowings	$	130,074	3.24	%	$	179,083	3.12	%
Schedule of Maturities of Long-term Debt [Table Text Block]	The aggregate minimum annual retirements of long-term borrowings in future periods are as follows:
	(Dollars in thousands)	Balance		Weighted-Average Rate
	Nine Months Ending December 31, 2015	$	6,819	2.91	%
	Year Ending December 31, 2016	7,734		3.07	%
	Year Ending December 31, 2017	7,126		3.16	%
	Year Ending December 31, 2018	42,390		3.33	%
	Year Ending December 31, 2019	41,426		3.59	%
	Thereafter	24,579		2.69	%
	Total long-term borrowings	$	130,074	3.24	%

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Stockholders' Equity Attributable to Parent [Abstract]
Schedule of Preferred, Common and Treasury Stock	The following table details the progression in Peoples’ common shares and treasury stock during the three months ended March 31, 2015:
		Common Stock		Treasury
				Stock
	Shares at December 31, 2014	15,599,643		590,246
	Changes related to stock-based compensation awards:
	Grants of restricted common shares	107,036		—
	Release of restricted common shares	—		21,636
	Exercise of stock options for common shares	—		—
	Changes related to deferred compensation plan for Boards of Directors:
	Purchase of treasury stock	—		1,256
	Reissuance of treasury stock	—		(8,125	)
	Common shares issued under dividend reinvestment plan	4,148		—
	Common shares issued under compensation plan for Board of Directors	—		(2,100	)
	Common shares issued under employee stock purchase plan	—		(3,175	)
	Issuance of common shares related to the acquisition of
	NB&T Financial Group, Inc.	3,207,698		—
	Shares at March 31, 2015	18,918,525		599,738
Schedule of Accumulated Other Comprehensive (Loss) Income	The following table details the change in the components of Peoples’ accumulated other comprehensive income (loss) for the three months ended March 31, 2015:
	(Dollars in thousands)	Unrealized Gain on Securities			Unrecognized Net Pension and Postretirement Costs			Accumulated Other Comprehensive (Loss) Income
	Balance, December 31, 2014	$	2,542		$	(3,843	)	$	(1,301	)
	Reclassification adjustments to net income:
	Realized gain on sale of securities, net of tax	(390		)	—			(390		)
	Realized loss due to settlement and curtailment, net of tax	—			175			175
	Other comprehensive income, net of reclassifications and tax	5,775			3			5,778
	Balance, March 31, 2015	$	7,927		$	(3,665	)	$	4,262

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Pension Plans Remeasurement and Settlements [Text Block]	The following table summarizes the change in pension obligation and funded status as a result of this remeasurement and the aggregate settlements for the three months ended March 31, 2015:
		As of			March 31, 2015
	(Dollars in thousands)	December 31,			Before			Impact of			After
	Funded status:	2014			Settlement			Settlements			Settlements
	Projected benefit obligation	$	13,695		$	13,903		$	(625	)	$	13,278
	Fair value of plan assets	8,259			8,454			(625		)	7,829
	Funded status	$	(5,436	)	$	(5,449	)	$	—		$	(5,449	)
	Gross unrealized loss (gain)	$	5,979		$	5,974		$	(269	)	$	5,705
	Assumptions:
	Discount rate	3.5		%	3.4		%				3.4		%
	Expected return on plan assets	7.5		%	7.5		%				7.5		%
Schedule of Net Benefit Costs [Table Text Block]	The following tables detail the components of the net periodic cost for the plans:
		Pension Benefits
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015			2014
	Interest cost	$	115		$	143
	Expected return on plan assets	(130		)	(169		)
	Amortization of net loss	33			33
	Settlement of benefit obligation	269			486
	Net periodic cost	$	287		$	493
		Postretirement Benefits
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015			2014
	Interest cost	$	1		$	1
	Amortization of net gain	(1		)	(2		)
	Net periodic benefit	$	—		$	(1	)

Earnings_Per_Common_Share_Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Calculations of Basic and Diluted Earnings per Common Share	The calculations of basic and diluted (loss) earnings per common share were as follows:
		Three Months Ended
		March 31,
	(Dollars in thousands, except per share data)	2015			2014
	Distributed earnings allocated to common shareholders	$	2,243		$	1,605
	Undistributed (loss) earnings allocated to common shareholders	(2,941		)	3,146
	Net (loss) earnings allocated to common shareholders	$	(698	)	$	4,751
	Weighted-average common shares outstanding	15,802,334			10,636,089
	Effect of potentially dilutive common shares	127,901			104,795
	Total weighted-average diluted common shares outstanding	15,930,235			10,740,884
	(Loss) Earnings per common share:
	Basic	$	(0.04	)	$	0.45
	Diluted	$	(0.04	)	$	0.44
	Anti-dilutive shares excluded from calculation:
	Stock options and SARs	42,584			73,422

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Share-based Compensation [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	The following table summarizes the changes to Peoples' stock options for the three months ended March 31, 2015:
			Number of Common Shares Subject to Options			Weighted-Average Exercise Price			Weighted-Average Remaining Contractual Life		Aggregate Intrinsic Value
	Outstanding at January 1		38,577			$	28.09
	Expired		8,482			27.38
	Outstanding at March 31		30,095			$	28.29		0.8 years		$	—
	Exercisable at March 31		30,095			$	28.29		0.8 years		$	—
Schedule of Stock Options Outstanding & Exercisable by Exercise Price Range	The following table summarizes Peoples’ SARs outstanding at March 31, 2015:
	Exercise Price	Number of Common Shares Subject to SARs Outstanding & Exercisable		Weighted-
				Average Remaining Contractual
				Life
	$23.26	2,000		2.3 years
	$23.77	10,582		2.7 years
	$29.25	8,710		1.8 years
	Total	21,292		2.3 years
	The following table summarizes Peoples’ stock options outstanding at March 31, 2015:
				Options Outstanding & Exercisable
	Range of Exercise Prices			Common Shares Subject to Options Outstanding & Exercisable		Weighted-Average Remaining Contractual Life	Weighted-Average
							Exercise Price
	$26.01	to	$27.74	5,198		0.0 years	$	26.01
	$28.25	to	$28.26	13,697		0.9 years	28.25
	$28.57	to	$30.00	11,200		1.1 years	29.4
	Total			30,095		0.8 years	$	28.29
Schedule of Stock Appreciation Rights Outstanding & Exercisable by Exercise Price	The following table summarizes the changes to Peoples' SARs for the three months ended March 31, 2015:
			Number of Common Shares Subject to SARs			Weighted-			Weighted-Average Remaining Contractual Life		Aggregate Intrinsic
						Average					Value
						Exercise
						Price
	Outstanding at January 1		21,292			$	25.96
	Outstanding at March 31		21,292			$	25.96		2.3 years		$	1,000
	Exercisable at March 31		21,292			$	25.96		2.3 years		$	1,000
Schedule of Restricted Shares Activity	The following table summarizes the changes to Peoples’ restricted common shares for the three months ended March 31, 2015:
		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	47,591		$	19.48			125,079	$	21.73
	Awarded	—		—				107,961	23.63
	Released	23,712		15.7				49,058	21.74
	Forfeited	500		15.64				425	21.79
	Outstanding at March 31	23,379		$	23.39			183,557	$	22.84
Summary of Stock-Based Compensation and Related Tax Benefit	The following table summarizes the amount of stock-based compensation expense and related tax benefit recognized:
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015			2014
	Total stock-based compensation	$	565		$	490
	Recognized tax benefit	(198		)	(172		)
	Net expense recognized	$	367		$	318

Acquisitions_Acquisitions_Purc

Acquisitions Acquisitions Purchase Price and Fair Value of Assets Acquired and Liabilities Assumed (Tables)	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table provides the preliminary purchase price calculation as of the date of acquisition for NB&T, and the assets acquired and liabilities assumed at their estimated fair values.
	(Dollars in thousands, except per share data)	NB&T
	Purchase Price
	Common shares outstanding of acquired company at acquisition date	3,442,329
	Cash purchase price per share	$	7.75
	Cash consideration	26,678
	Number of common shares of Peoples issued for each common share of acquired company	0.9319
	Price per Peoples common share, based on closing stock price on acquisition date	$	23.7
	Common share consideration	76,027
	Total purchase price	$	102,705
	Net Assets at Fair Value
	Assets
	Cash and cash equivalents	$	130,275
	Investment securities	156,392
	Loans, including loans held for sale, net of deferred fees and costs	389,985
	Bank premises and equipment, net	10,702
	Other intangible assets	8,868
	Other assets	24,070
	Total assets	720,292
	Liabilities
	Deposits	629,512
	Borrowings	6,570
	Accrued expenses and other liabilities	7,603
	Total liabilities	643,685
	Net assets	$	76,607
	Goodwill	$	26,098

Acquisitions_Acquisitions_Fair

Acquisitions Acquisitions, Fair Value of Loans Acquired (Tables)	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Acquired Loans at Fair Value [Table Text Block]	Acquired loans are reported net of the unamortized fair value adjustment. The following table details the preliminary fair value adjustment for acquired loans as of the acquisition date:
	(Dollars in thousands, except per share data)	NB&T
	Nonimpaired Loans
	Contractual cash flows	$	541,292
	Nonaccretable difference	76,853
	Expected cash flows	464,439
	Accretable yield	99,678
	Fair value	$	364,761
	Purchase Credit Impaired Loans
	Contractual cash flows	$	44,936
	Nonaccretable difference	14,929
	Expected cash flows	30,007
	Accretable yield	4,783
	Fair value	$	25,224

Acquisitions_Schedule_of_Goodw

Acquisitions Schedule of Goodwill and Intangibles (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]	The following table is a preliminary summary of the changes in goodwill and intangible assets during the period ended March 31, 2015:
	(Dollars in thousands)	Goodwill		Gross Core Deposits			Gross Customer Relationships
	Balance, December 31, 2014	$	98,562	$	13,546		$	8,859
	Acquired intangible assets	26,098		8,623			—
	Balance, March 31, 2015	$	124,660	$	22,169		$	8,859
Schedule of Finite-Lived Intangible Assets [Table Text Block]
	(Dollars in thousands)	Gross Intangible Assets		Accumulated Amortization			Net Intangible Assets
	31-Mar-15
	Core deposits	$	22,169	$	(8,232	)	$	13,937
	Customer relationships	8,859		(6,488		)	2,371
	Total acquired intangible assets	$	31,028	$	(14,720	)	$	16,308
	Servicing rights						2,469
	Total other intangible assets						$	18,777

Summary_of_Significant_Account2

Summary of Significant Accounting Policies Accounting Policies (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accounting Policies [Abstract]
Performance-based insurance commissions	$1.50	$1.20

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Assets Measured at Fair Value Nonrecurring) (Details) (Nonrecurring Basis, USD $)	3 Months Ended
	Mar. 31, 2015
Nonrecurring Basis
Losses on impaired loans charged through allowance for loan losses	$135,000
Significant Other Observable Inputs (Level 2)
Nonrecurring Basis
Impaired loans, aggregate outstanding principal balance	1,400,000
Impaired loans, fair value	$1,300,000

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Assets Measured at Fair Value Recurring) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Recurring Basis
Available-for-sale securities	$760,822	$636,880
Held-to-maturity securities	48,774	48,442
Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Held-to-maturity securities	0	0
Significant Other Observable Inputs (Level 2)
Recurring Basis
Held-to-maturity securities	48,774	48,442
Significant Unobservable Inputs (Level 3)
Recurring Basis
Held-to-maturity securities	0	0
U.S. Treasury and government agencies
Recurring Basis
Available-for-sale securities	0	1
U.S. government sponsored agencies
Recurring Basis
Available-for-sale securities	5,488	5,950
States and political subdivisions
Recurring Basis
Available-for-sale securities	118,447	64,743
Held-to-maturity securities	4,308	4,282
States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Held-to-maturity securities	0	0
States and political subdivisions | Significant Other Observable Inputs (Level 2)
Recurring Basis
Held-to-maturity securities	4,308	4,282
States and political subdivisions | Significant Unobservable Inputs (Level 3)
Recurring Basis
Held-to-maturity securities	0	0
Residential mortgage-backed securities
Recurring Basis
Available-for-sale securities	597,232	527,291
Held-to-maturity securities	36,835	36,740
Residential mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Held-to-maturity securities	0	0
Residential mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Recurring Basis
Held-to-maturity securities	36,835	36,740
Residential mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Recurring Basis
Held-to-maturity securities	0	0
Commercial mortgage-backed securities
Recurring Basis
Available-for-sale securities	28,241	27,847
Held-to-maturity securities	7,631	7,420
Commercial mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Held-to-maturity securities	0	0
Commercial mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Recurring Basis
Held-to-maturity securities	7,631	7,420
Commercial mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Recurring Basis
Held-to-maturity securities	0	0
Bank-issued trust preferred securities
Recurring Basis
Available-for-sale securities	5,649	5,645
Equity securities
Recurring Basis
Available-for-sale securities	5,765	5,403
Recurring Basis [Member]
Recurring Basis
Available-for-sale securities	760,822	636,880
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Available-for-sale securities	12,001	5,204
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2)
Recurring Basis
Available-for-sale securities	748,821	631,676
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | U.S. Treasury and government agencies
Recurring Basis
Available-for-sale securities	0	1
Recurring Basis [Member] | U.S. Treasury and government agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | U.S. Treasury and government agencies | Significant Other Observable Inputs (Level 2)
Recurring Basis
Available-for-sale securities	0	1
Recurring Basis [Member] | U.S. Treasury and government agencies | Significant Unobservable Inputs (Level 3)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | U.S. government sponsored agencies
Recurring Basis
Available-for-sale securities	5,488	5,950
Recurring Basis [Member] | U.S. government sponsored agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | U.S. government sponsored agencies | Significant Other Observable Inputs (Level 2)
Recurring Basis
Available-for-sale securities	5,488	5,950
Recurring Basis [Member] | U.S. government sponsored agencies | Significant Unobservable Inputs (Level 3)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | States and political subdivisions
Recurring Basis
Available-for-sale securities	118,447	64,743
Recurring Basis [Member] | States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | States and political subdivisions | Significant Other Observable Inputs (Level 2)
Recurring Basis
Available-for-sale securities	118,447	64,743
Recurring Basis [Member] | States and political subdivisions | Significant Unobservable Inputs (Level 3)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | Residential mortgage-backed securities
Recurring Basis
Available-for-sale securities	597,232	527,291
Recurring Basis [Member] | Residential mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Available-for-sale securities	6,439	0
Recurring Basis [Member] | Residential mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Recurring Basis
Available-for-sale securities	590,793	527,291
Recurring Basis [Member] | Residential mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | Commercial mortgage-backed securities
Recurring Basis
Available-for-sale securities	28,241	27,847
Recurring Basis [Member] | Commercial mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | Commercial mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Recurring Basis
Available-for-sale securities	28,241	27,847
Recurring Basis [Member] | Commercial mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | Bank-issued trust preferred securities
Recurring Basis
Available-for-sale securities	5,649	5,645
Recurring Basis [Member] | Bank-issued trust preferred securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | Bank-issued trust preferred securities | Significant Other Observable Inputs (Level 2)
Recurring Basis
Available-for-sale securities	5,649	5,645
Recurring Basis [Member] | Bank-issued trust preferred securities | Significant Unobservable Inputs (Level 3)
Recurring Basis
Available-for-sale securities	0	0
Recurring Basis [Member] | Equity securities
Recurring Basis
Available-for-sale securities	5,765	5,403
Recurring Basis [Member] | Equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring Basis
Available-for-sale securities	5,562	5,204
Recurring Basis [Member] | Equity securities | Significant Other Observable Inputs (Level 2)
Recurring Basis
Available-for-sale securities	203	199
Recurring Basis [Member] | Equity securities | Significant Unobservable Inputs (Level 3)
Recurring Basis
Available-for-sale securities	$0	$0

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments (Fair Values of Financial Assets and Liabilities on Balance Sheets) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value Measurement
Financial assets:
Cash and cash equivalents	$166,402	$61,454
Investment securities	845,847	713,633
Loans	1,950,086	1,581,813
Financial liabilities:
Deposits	2,586,216	1,938,021
Short-term borrowings	91,101	88,277
Long-term borrowings	135,516	183,878
Carrying Amount
Financial assets:
Cash and cash equivalents	166,402	61,454
Investment securities	845,118	713,659
Loans	1,983,247	1,607,391
Financial liabilities:
Deposits	2,581,136	1,933,074
Short-term borrowings	91,101	88,277
Long-term borrowings	$130,074	$179,083

Investment_Securities_Availabl

Investment Securities (Available-for-sale Securities) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities
Amortized Cost	$748,622	$632,967
Gross Unrealized Gains	17,491	12,693
Gross Unrealized Losses	-5,291	-8,780
Fair Value	760,822	636,880
U.S. Treasury and government agencies
Schedule of Available-for-sale Securities
Amortized Cost	0	1
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	0	1
U.S. government sponsored agencies
Schedule of Available-for-sale Securities
Amortized Cost	5,351	5,836
Gross Unrealized Gains	137	114
Gross Unrealized Losses	0	0
Fair Value	5,488	5,950
States and political subdivisions
Schedule of Available-for-sale Securities
Amortized Cost	114,775	62,292
Gross Unrealized Gains	3,734	2,510
Gross Unrealized Losses	-62	-59
Fair Value	118,447	64,743
Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	592,904	529,245
Gross Unrealized Gains	8,965	5,910
Gross Unrealized Losses	-4,637	-7,864
Fair Value	597,232	527,291
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	27,907	28,021
Gross Unrealized Gains	353	112
Gross Unrealized Losses	-19	-286
Fair Value	28,241	27,847
Bank-issued trust preferred securities
Schedule of Available-for-sale Securities
Amortized Cost	6,137	6,132
Gross Unrealized Gains	5	3
Gross Unrealized Losses	-493	-490
Fair Value	5,649	5,645
Equity securities
Schedule of Available-for-sale Securities
Amortized Cost	1,548	1,440
Gross Unrealized Gains	4,297	4,044
Gross Unrealized Losses	-80	-81
Fair Value	$5,765	$5,403

Investment_Securities_Availabl1

Investment Securities (Available-for-sale Securities Gross Realized Gains and Losses) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Gross gains and gross losses realized from sales of available-for-sale securities:
Gross gains realized	$600	$514
Gross losses realized	0	544
Net gain (loss) realized	$600	($30)

Investment_Securities_Availabl2

Investment Securities (Available-for-sale Securities with Unrealized Loss) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
	securities	securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, fair value	$122,173,000	$116,660,000
Less than 12 months, unrealized loss	1,108,000	1,105,000
Less than 12 months, no. of securities	45	27
12 months or more, fair value	131,520,000	244,021,000
12 months or more, unrealized loss	4,183,000	7,675,000
12 months or more, no. of securities	41	73
Total unrealized loss position, fair value	253,693,000	360,681,000
Total unrealized loss	5,291,000	8,780,000
States and political subdivisions
Available-for-sale securities that had an unrealized loss:
Less than 12 months, fair value	5,706,000	2,602,000
Less than 12 months, unrealized loss	54,000	12,000
Less than 12 months, no. of securities	10	4
12 months or more, fair value	214,000	5,788,000
12 months or more, unrealized loss	8,000	47,000
12 months or more, no. of securities	1	8
Total unrealized loss position, fair value	5,920,000	8,390,000
Total unrealized loss	62,000	59,000
Residential mortgage-backed securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, fair value	108,910,000	114,018,000
Less than 12 months, unrealized loss	1,034,000	1,091,000
Less than 12 months, no. of securities	31	21
12 months or more, fair value	128,705,000	216,224,000
12 months or more, unrealized loss	3,603,000	6,773,000
12 months or more, no. of securities	36	57
Total unrealized loss position, fair value	237,615,000	330,242,000
Total unrealized loss	4,637,000	7,864,000
Commercial mortgage-backed securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, fair value	7,516,000	0
Less than 12 months, unrealized loss	19,000	0
Less than 12 months, no. of securities	2	0
12 months or more, fair value	0	19,404,000
12 months or more, unrealized loss	0	286,000
12 months or more, no. of securities	0	4
Total unrealized loss position, fair value	7,516,000	19,404,000
Total unrealized loss	19,000	286,000
Bank-issued trust preferred securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, fair value	0	0
Less than 12 months, unrealized loss	0	0
Less than 12 months, no. of securities	0	0
12 months or more, fair value	2,505,000	2,509,000
12 months or more, unrealized loss	493,000	490,000
12 months or more, no. of securities	3	3
Total unrealized loss position, fair value	2,505,000	2,509,000
Total unrealized loss	493,000	490,000
Number of bank-issued trust preferred securities in unrealized loss position for twelve months or more	3
Equity securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, fair value	41,000	40,000
Less than 12 months, unrealized loss	1,000	2,000
Less than 12 months, no. of securities	2	2
12 months or more, fair value	96,000	96,000
12 months or more, unrealized loss	79,000	79,000
12 months or more, no. of securities	1	1
Total unrealized loss position, fair value	137,000	136,000
Total unrealized loss	80,000	81,000
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 more than 12 months	99.00%
Mortgage-backed securities, privately issued
Available-for-sale securities that had an unrealized loss:
Less than 12 months, no. of securities	3
Percentage of mortgage-backed securities in unrealized loss position for more than 12 months	1.00%
Number of privately issued mortgage-backed securities securities with book value less than 90% of fair value	2
Fair value within book value	90.00%
Fair Value Less Than 90 Percent of Book Value [Member] | Mortgage-backed securities, privately issued
Available-for-sale securities that had an unrealized loss:
12 months or more, fair value	600,000
Book value of privately issued mortgage-backed securities in unrealized loss position for more than 12 months	$900,000

Investment_Securities_Availabl3

Investment Securities (Available-for-sale Securities by Maturities) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	$275
Debt securities, maturing 1 to 5 years, amortized cost	19,623
Debt securities, maturing 5 to 10 years, amortized cost	89,994
Available-for-sale securities, maturing over 10 years, amortized cost	637,182
Available-for-sale securities, total amortized cost	748,622	632,967
Debt securities, maturing within 1 year, fair value	280
Debt securities, maturing 1 to 5 years, fair value	20,023
Debt securities, maturing 5 to 10 years, fair value	91,801
Available-for-sale securities, maturing over 10 years, fair value	642,953
Fair Value	760,822	636,880
Available-for-sale securities, maturing within 1 year, average yield	4.61%
Available-for-sale securities, maturing 1 to 5 years, average yield	3.29%
Available-for-sale securities, maturing 5 to 10 years, average yield	2.88%
Available-for-sale securities, maturing over 10 years, average yield	2.74%
Available-for-sale securities, total average yield	2.79%
U.S. Treasury and government agencies
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	0
Debt securities, maturing over 10 years, amortized cost	0
Debt securities, total amortized cost	0
Available-for-sale securities, total amortized cost	0	1
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	0
Debt securities, maturing over 10 years, fair value	0
Debt securities, total fair value	0
Fair Value	0	1
U.S. government sponsored agencies
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	985
Debt securities, maturing 5 to 10 years, amortized cost	0
Debt securities, maturing over 10 years, amortized cost	4,366
Debt securities, total amortized cost	5,351
Available-for-sale securities, total amortized cost	5,351	5,836
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	999
Debt securities, maturing 5 to 10 years, fair value	0
Debt securities, maturing over 10 years, fair value	4,489
Debt securities, total fair value	5,488
Fair Value	5,488	5,950
States and political subdivisions
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	275
Debt securities, maturing 1 to 5 years, amortized cost	6,432
Debt securities, maturing 5 to 10 years, amortized cost	31,498
Debt securities, maturing over 10 years, amortized cost	76,570
Debt securities, total amortized cost	114,775
Available-for-sale securities, total amortized cost	114,775	62,292
Debt securities, maturing within 1 year, fair value	280
Debt securities, maturing 1 to 5 years, fair value	6,718
Debt securities, maturing 5 to 10 years, fair value	32,558
Debt securities, maturing over 10 years, fair value	78,891
Debt securities, total fair value	118,447
Fair Value	118,447	64,743
Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	12,206
Debt securities, maturing 5 to 10 years, amortized cost	35,513
Debt securities, maturing over 10 years, amortized cost	545,185
Debt securities, total amortized cost	592,904
Available-for-sale securities, total amortized cost	592,904	529,245
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	12,306
Debt securities, maturing 5 to 10 years, fair value	36,046
Debt securities, maturing over 10 years, fair value	548,880
Debt securities, total fair value	597,232
Fair Value	597,232	527,291
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	22,983
Debt securities, maturing over 10 years, amortized cost	4,924
Debt securities, total amortized cost	27,907
Available-for-sale securities, total amortized cost	27,907	28,021
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	23,197
Debt securities, maturing over 10 years, fair value	5,044
Debt securities, total fair value	28,241
Fair Value	28,241	27,847
Bank-issued trust preferred securities
Schedule of Available-for-sale Securities
Other securities, maturing over 10 years, amortized cost	6,137
Other securities, total amortized cost	6,137
Available-for-sale securities, total amortized cost	6,137	6,132
Other securities, maturing over 10 years, fair value	5,649
Other securities, total fair value	5,649
Fair Value	5,649	5,645
Equity securities
Schedule of Available-for-sale Securities
Other securities, total amortized cost	1,548
Available-for-sale securities, total amortized cost	1,548	1,440
Other securities, total fair value	5,765
Fair Value	$5,765	$5,403

Investment_Securities_Heldtoma

Investment Securities (Held-to-maturity Securities) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$48,045	$48,468
Gross Unrealized Gains	988	646
Gross Unrealized Losses	-259	-672
Fair Value	48,774	48,442
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	3,838	3,841
Gross Unrealized Gains	474	448
Gross Unrealized Losses	-4	-7
Fair Value	4,308	4,282
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	36,564	36,945
Gross Unrealized Gains	504	189
Gross Unrealized Losses	-233	-394
Fair Value	36,835	36,740
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	7,643	7,682
Gross Unrealized Gains	10	9
Gross Unrealized Losses	-22	-271
Fair Value	$7,631	$7,420

Recovered_Sheet1

Investment Securities (Held-to-Maturity Securities Gross Realized Gains and Losses) (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Realized Gain (Loss) on Held-to-Maturity Securities	$0	$0

Investment_Securities_Heldtoma1

Investment Securities (Held-to-maturity Securities with Unrealized Loss) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	securities	securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$3,148	$0
Less than 12 months, unrealized loss	15	0
Less than 12 months, no. of securities	1	0
12 months or more, fair value	17,552	24,921
12 months or more, unrealized loss	244	672
12 months or more, no. of securities	4	7
Total fair value	20,700	24,921
Total unrealized loss	259	672
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized loss	0	0
Less than 12 months, no. of securities	0	0
12 months or more, fair value	324	323
12 months or more, unrealized loss	4	7
12 months or more, no. of securities	1	1
Total fair value	324	323
Total unrealized loss	4	7
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	3,148	0
Less than 12 months, unrealized loss	15	0
Less than 12 months, no. of securities	1	0
12 months or more, fair value	10,655	18,242
12 months or more, unrealized loss	218	394
12 months or more, no. of securities	2	5
Total fair value	13,803	18,242
Total unrealized loss	233	394
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized loss	0	0
Less than 12 months, no. of securities	0	0
12 months or more, fair value	6,573	6,356
12 months or more, unrealized loss	22	271
12 months or more, no. of securities	1	1
Total fair value	6,573	6,356
Total unrealized loss	$22	$271

Investment_Securities_Heldtoma2

Investment Securities (Held-to-maturity Securities by Maturities) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	$0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	831
Debt securities, maturing over 10 years, amortized cost	47,214
Debt securities, total amortized cost	48,045	48,468
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	832
Debt securities, maturing over 10 years, fair value	47,942
Fair Value	48,774	48,442
Held-to-maturity securities, maturing within 1 year, average yield	0.00%
Held-to-maturity securities, maturing 1 to 5 years, average yield	0.00%
Held-to-maturity securities, maturing 6 to 10 years, average yield	2.61%
Held-to-maturity securities, maturing over 10 years, average yield	2.78%
Held-to-maturity securities, total average yield	2.78%
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	328
Debt securities, maturing over 10 years, amortized cost	3,510
Debt securities, total amortized cost	3,838	3,841
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	324
Debt securities, maturing over 10 years, fair value	3,984
Fair Value	4,308	4,282
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	503
Debt securities, maturing over 10 years, amortized cost	36,061
Debt securities, total amortized cost	36,564	36,945
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	508
Debt securities, maturing over 10 years, fair value	36,327
Fair Value	36,835	36,740
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	0
Debt securities, maturing over 10 years, amortized cost	7,643
Debt securities, total amortized cost	7,643	7,682
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	0
Debt securities, maturing over 10 years, fair value	7,631
Fair Value	$7,631	$7,420

Investment_Securities_Pledged_

Investment Securities (Pledged Securities) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Schedule of Securities
Pledged Financial Instruments, Not Separately Reported, Held-To-Maturity Securities for Federal Home Loan Bank and Federal Reserve Bank	$24.20	$24.50
Carrying value of available-for-sale securities pledged to secure public and trust department deposits and repurchase agreements	487.8	352.8
Carrying value of held-to-maturity securities pledged to secure public and trust department deposits and repurchase agreements	22.8	22.9
Carrying value of available-for-sale securities pledged to secure additional borrowing capacity at Federal Home Loan Bank and Federal Reserve Bank	$12.90	$13.50

Investment_Securities_Fully_ta

Investment Securities (Fully tax-equivalent basis) (Details)	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Federal income tax rate	35.00%

Loans_Narrative_Details

Loans (Narrative) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Impaired, Commitment to Lend	$0
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pledged assets separately reported, loans pledged as collateral, at fair value	447,900,000	457,100,000
Commerical Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pledged assets separately reported, loans pledged as collateral, at fair value	$140,400,000	$150,700,000

Loans_Loan_Balances_By_Classif

Loans (Loan Balances By Classification) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	$1,996,296	$1,620,898
Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,996,296	1,620,898
Originated Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,220,965	1,212,014
Originated Loan [Member] | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	44,276	37,901
Originated Loan [Member] | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	429,541	434,660
Originated Loan [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	473,817	472,561
Originated Loan [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	247,103	249,975
Originated Loan [Member] | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	256,551	254,169
Originated Loan [Member] | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	63,491	62,463
Originated Loan [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	176,857	169,913
Originated Loan [Member] | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	3,146	2,933
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	775,331	408,884
Acquired Loans [Member] | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	9,759	1,051
Acquired Loans [Member] | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	317,225	121,475
Acquired Loans [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	326,984	122,526
Acquired Loans [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	78,873	30,056
Acquired Loans [Member] | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	317,529	225,274
Acquired Loans [Member] | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	38,222	18,232
Acquired Loans [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	13,723	12,796
Acquired Loans [Member] | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	$0	$0

Loans_Loans_Acquired_With_Dete

Loans (Loans Acquired With Deterioration of Credit Quality) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Purchased credit impaired loans
Outstanding balance	$53,259	$24,292
Carrying amount	43,210	19,067
Commercial real estate
Purchased credit impaired loans
Outstanding balance	19,036	7,762
Commercial and industrial
Purchased credit impaired loans
Outstanding balance	3,722	1,041
Residential real estate
Purchased credit impaired loans
Outstanding balance	30,197	15,183
Consumer
Purchased credit impaired loans
Outstanding balance	$304	$306

Loans_Accretable_Yield_Rollfor

Loans Accretable Yield Rollforward (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield	$8,756	$3,172
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	1,112
Accretion of Discount	-311
NB&T Financial Group, Inc. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield	$4,783

Loans_Nonaccrual_and_Past_Due_

Loans (Nonaccrual and Past Due Loans) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	$8,362	$8,406
Accruing Loans 90 or More Days Past Due	3,700	2,799
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1,283	1,136
Accruing Loans 90 or More Days Past Due	3,074	1,959
Acquired Loans [Member] | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	96	96
Accruing Loans 90 or More Days Past Due	0	0
Acquired Loans [Member] | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	37	9
Accruing Loans 90 or More Days Past Due	1,752	567
Acquired Loans [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	133	105
Accruing Loans 90 or More Days Past Due	1,752	567
Acquired Loans [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	451	708
Accruing Loans 90 or More Days Past Due	283	301
Acquired Loans [Member] | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	680	304
Accruing Loans 90 or More Days Past Due	1,023	1,083
Acquired Loans [Member] | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	19	19
Accruing Loans 90 or More Days Past Due	13	0
Acquired Loans [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	0	0
Accruing Loans 90 or More Days Past Due	3	8
Originated Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	7,079	7,270
Accruing Loans 90 or More Days Past Due	626	840
Originated Loan [Member] | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	0	0
Accruing Loans 90 or More Days Past Due	0	0
Originated Loan [Member] | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	2,128	2,575
Accruing Loans 90 or More Days Past Due	394	0
Originated Loan [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	2,128	2,575
Accruing Loans 90 or More Days Past Due	394	0
Originated Loan [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1,277	1,286
Accruing Loans 90 or More Days Past Due	125	0
Originated Loan [Member] | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	3,228	3,049
Accruing Loans 90 or More Days Past Due	73	818
Originated Loan [Member] | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	432	341
Accruing Loans 90 or More Days Past Due	34	20
Originated Loan [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	14	19
Accruing Loans 90 or More Days Past Due	$0	$2

Loans_Aging_Of_The_Recorded_In

Loans (Aging Of The Recorded Investment In Past Due Loans And Leases) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$1,978,208	$1,603,017
Total Loans	1,996,296	1,620,898
Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	17,125	12,022
60 - 89 days	2,319	3,473
90 Days	7,385	7,163
Total	26,829	22,658
Current Loans	1,969,467	1,598,240
Total Loans	1,996,296	1,620,898
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	8,884	5,393
60 - 89 days	1,464	1,526
90 Days	3,422	2,665
Total	13,770	9,584
Current Loans	761,561	399,300
Total Loans	775,331	408,884
Acquired Loans [Member] | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	0	0
60 - 89 days	0	0
90 Days	96	96
Total	96	96
Current Loans	9,663	955
Total Loans	9,759	1,051
Acquired Loans [Member] | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	1,634	1,067
60 - 89 days	271	143
90 Days	1,760	567
Total	3,665	1,777
Current Loans	313,560	119,698
Total Loans	317,225	121,475
Acquired Loans [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	1,634	1,067
60 - 89 days	271	143
90 Days	1,856	663
Total	3,761	1,873
Current Loans	323,223	120,653
Total loans	326,984	122,526
Total Loans	326,984	122,526
Acquired Loans [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	1,737	46
60 - 89 days	341	6
90 Days	283	815
Total	2,361	867
Current Loans	76,512	29,189
Total Loans	78,873	30,056
Acquired Loans [Member] | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	5,341	4,026
60 - 89 days	805	1,331
90 Days	1,267	1,179
Total	7,413	6,536
Current Loans	310,116	218,738
Total Loans	317,529	225,274
Acquired Loans [Member] | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	27	9
60 - 89 days	19	19
90 Days	13	0
Total	59	28
Current Loans	38,163	18,204
Total Loans	38,222	18,232
Acquired Loans [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	145	245
60 - 89 days	28	27
90 Days	3	8
Total	176	280
Current Loans	13,547	12,516
Total Loans	13,723	12,796
Acquired Loans [Member] | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	0	0
60 - 89 days	0	0
90 Days	0	0
Total	0	0
Current Loans	0	0
Total Loans	0	0
Originated Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	8,241	6,629
60 - 89 days	855	1,947
90 Days	3,963	4,498
Total	13,059	13,074
Current Loans	1,207,906	1,198,940
Total Loans	1,220,965	1,212,014
Originated Loan [Member] | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	0	0
60 - 89 days	0	0
90 Days	0	0
Total	0	0
Current Loans	44,276	37,901
Total Loans	44,276	37,901
Originated Loan [Member] | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	2,926	565
60 - 89 days	49	285
90 Days	1,395	1,220
Total	4,370	2,070
Current Loans	425,171	432,590
Total Loans	429,541	434,660
Originated Loan [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	2,926	565
60 - 89 days	49	285
90 Days	1,395	1,220
Total	4,370	2,070
Current Loans	469,447	470,491
Total loans	473,817	472,561
Total Loans	473,817	472,561
Originated Loan [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	757	17
60 - 89 days	14	18
90 Days	1,367	1,245
Total	2,138	1,280
Current Loans	244,965	248,695
Total Loans	247,103	249,975
Originated Loan [Member] | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	3,737	4,502
60 - 89 days	591	1,062
90 Days	927	1,902
Total	5,255	7,466
Current Loans	251,296	246,703
Total Loans	256,551	254,169
Originated Loan [Member] | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	113	344
60 - 89 days	83	425
90 Days	274	129
Total	470	898
Current Loans	63,021	61,565
Total Loans	63,491	62,463
Originated Loan [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	685	1,136
60 - 89 days	118	157
90 Days	0	2
Total	803	1,295
Current Loans	176,054	168,618
Total Loans	176,857	169,913
Originated Loan [Member] | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	23	65
60 - 89 days	0	0
90 Days	0	0
Total	23	65
Current Loans	3,123	2,868
Total Loans	$3,146	$2,933

Loans_Loans_By_Risk_Category_D

Loans (Loans By Risk Category) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$1,978,208	$1,603,017
Loans, net of deferred fees and costs	1,996,296	1,620,898
Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,996,296	1,620,898
Pass Rated (Grades 1 - 4)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,068,395	852,370
Watch (Grade 5)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	46,272	29,822
Substandard (Grade 6)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	69,514	44,472
Doubtful (Grade 7)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,083	251
Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	811,032	693,983
Total Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,996,296	1,620,898
Originated Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,220,965	1,212,014
Originated Loan [Member] | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	44,276	37,901
Originated Loan [Member] | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	429,541	434,660
Originated Loan [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	473,817	472,561
Loans, net of deferred fees and costs	473,817	472,561
Originated Loan [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	247,103	249,975
Originated Loan [Member] | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	256,551	254,169
Originated Loan [Member] | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	63,491	62,463
Originated Loan [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	176,857	169,913
Originated Loan [Member] | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	3,146	2,933
Originated Loan [Member] | Pass Rated (Grades 1 - 4)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	687,360	704,152
Originated Loan [Member] | Pass Rated (Grades 1 - 4) | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	44,011	37,637
Originated Loan [Member] | Pass Rated (Grades 1 - 4) | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	401,076	405,224
Originated Loan [Member] | Pass Rated (Grades 1 - 4) | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	445,087	442,861
Originated Loan [Member] | Pass Rated (Grades 1 - 4) | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	220,201	239,168
Originated Loan [Member] | Pass Rated (Grades 1 - 4) | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	21,241	21,296
Originated Loan [Member] | Pass Rated (Grades 1 - 4) | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	763	767
Originated Loan [Member] | Pass Rated (Grades 1 - 4) | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	68	60
Originated Loan [Member] | Pass Rated (Grades 1 - 4) | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Watch (Grade 5)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	22,056	21,634
Originated Loan [Member] | Watch (Grade 5) | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Watch (Grade 5) | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	12,014	12,316
Originated Loan [Member] | Watch (Grade 5) | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	12,014	12,316
Originated Loan [Member] | Watch (Grade 5) | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	8,961	8,122
Originated Loan [Member] | Watch (Grade 5) | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,081	1,195
Originated Loan [Member] | Watch (Grade 5) | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Watch (Grade 5) | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	1
Originated Loan [Member] | Watch (Grade 5) | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Substandard (Grade 6)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	47,404	32,378
Originated Loan [Member] | Substandard (Grade 6) | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Substandard (Grade 6) | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	16,451	17,120
Originated Loan [Member] | Substandard (Grade 6) | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	16,451	17,120
Originated Loan [Member] | Substandard (Grade 6) | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	17,096	2,684
Originated Loan [Member] | Substandard (Grade 6) | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	13,089	11,601
Originated Loan [Member] | Substandard (Grade 6) | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	762	965
Originated Loan [Member] | Substandard (Grade 6) | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	6	8
Originated Loan [Member] | Substandard (Grade 6) | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Doubtful (Grade 7)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	238	57
Originated Loan [Member] | Doubtful (Grade 7) | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Doubtful (Grade 7) | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Doubtful (Grade 7) | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Doubtful (Grade 7) | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1	1
Originated Loan [Member] | Doubtful (Grade 7) | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	237	56
Originated Loan [Member] | Doubtful (Grade 7) | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Doubtful (Grade 7) | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Doubtful (Grade 7) | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	463,907	453,793
Originated Loan [Member] | Not Rated | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	265	264
Originated Loan [Member] | Not Rated | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Originated Loan [Member] | Not Rated | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	265	264
Originated Loan [Member] | Not Rated | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	844	0
Originated Loan [Member] | Not Rated | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	220,903	220,021
Originated Loan [Member] | Not Rated | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	61,966	60,731
Originated Loan [Member] | Not Rated | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	176,783	169,844
Originated Loan [Member] | Not Rated | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	3,146	2,933
Originated Loan [Member] | Total Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,220,965	1,212,014
Acquired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	775,331	408,884
Acquired Loans [Member] | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	9,759	1,051
Acquired Loans [Member] | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	317,225	121,475
Acquired Loans [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	326,984	122,526
Loans, net of deferred fees and costs	326,984	122,526
Acquired Loans [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	78,873	30,056
Acquired Loans [Member] | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	317,529	225,274
Acquired Loans [Member] | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	38,222	18,232
Acquired Loans [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	13,723	12,796
Acquired Loans [Member] | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Pass Rated (Grades 1 - 4)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	381,035	148,218
Acquired Loans [Member] | Pass Rated (Grades 1 - 4) | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	9,759	955
Acquired Loans [Member] | Pass Rated (Grades 1 - 4) | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	282,216	106,115
Acquired Loans [Member] | Pass Rated (Grades 1 - 4) | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	291,975	107,070
Acquired Loans [Member] | Pass Rated (Grades 1 - 4) | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	69,323	27,313
Acquired Loans [Member] | Pass Rated (Grades 1 - 4) | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	19,077	13,458
Acquired Loans [Member] | Pass Rated (Grades 1 - 4) | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	324	98
Acquired Loans [Member] | Pass Rated (Grades 1 - 4) | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	336	279
Acquired Loans [Member] | Pass Rated (Grades 1 - 4) | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Watch (Grade 5)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	24,216	8,188
Acquired Loans [Member] | Watch (Grade 5) | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Watch (Grade 5) | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	18,045	7,100
Acquired Loans [Member] | Watch (Grade 5) | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	18,045	7,100
Acquired Loans [Member] | Watch (Grade 5) | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	4,396	255
Acquired Loans [Member] | Watch (Grade 5) | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1,775	833
Acquired Loans [Member] | Watch (Grade 5) | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Watch (Grade 5) | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Watch (Grade 5) | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Substandard (Grade 6)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	22,110	12,094
Acquired Loans [Member] | Substandard (Grade 6) | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Substandard (Grade 6) | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	16,461	8,260
Acquired Loans [Member] | Substandard (Grade 6) | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	16,461	8,260
Acquired Loans [Member] | Substandard (Grade 6) | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	4,812	2,294
Acquired Loans [Member] | Substandard (Grade 6) | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	836	1,540
Acquired Loans [Member] | Substandard (Grade 6) | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Substandard (Grade 6) | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	1	0
Acquired Loans [Member] | Substandard (Grade 6) | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Doubtful (Grade 7)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	845	194
Acquired Loans [Member] | Doubtful (Grade 7) | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Doubtful (Grade 7) | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	503	0
Acquired Loans [Member] | Doubtful (Grade 7) | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	503	0
Acquired Loans [Member] | Doubtful (Grade 7) | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	342	194
Acquired Loans [Member] | Doubtful (Grade 7) | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Doubtful (Grade 7) | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Doubtful (Grade 7) | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Doubtful (Grade 7) | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Not Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	347,125	240,190
Acquired Loans [Member] | Not Rated | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	96
Acquired Loans [Member] | Not Rated | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Not Rated | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	96
Acquired Loans [Member] | Not Rated | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Not Rated | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	295,841	209,443
Acquired Loans [Member] | Not Rated | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	37,898	18,134
Acquired Loans [Member] | Not Rated | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	13,386	12,517
Acquired Loans [Member] | Not Rated | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	0	0
Acquired Loans [Member] | Total Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	$775,331	$408,884

Loans_Schedule_Of_Impaired_Loa

Loans (Schedule Of Impaired Loans) (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$16,615	$12,098
Recorded Investment With Allowance	2,221	2,651
Recorded Investment Without Allowance	12,543	8,663
Total Recorded Investment	14,764	11,314
Related Allowance	725	1,014
Average Recorded Investment	5,154	6,132
Interest Income Recognized	283	319
Commercial real estate, construction
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	44	101
Recorded Investment With Allowance	0	0
Recorded Investment Without Allowance	44	96
Total Recorded Investment	44	96
Related Allowance	0	0
Average Recorded Investment	18	57
Interest Income Recognized	2	6
Commercial real estate, other
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,762	2,074
Recorded Investment With Allowance	742	653
Recorded Investment Without Allowance	786	1,148
Total Recorded Investment	1,528	1,801
Related Allowance	189	189
Average Recorded Investment	675	1,632
Interest Income Recognized	18	7
Commercial real estate
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,806	2,175
Recorded Investment With Allowance	742	653
Recorded Investment Without Allowance	830	1,244
Total Recorded Investment	1,572	1,897
Related Allowance	189	189
Average Recorded Investment	693	1,689
Interest Income Recognized	20	13
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	4,330	2,379
Recorded Investment With Allowance	1,428	1,945
Recorded Investment Without Allowance	2,103	399
Total Recorded Investment	3,531	2,344
Related Allowance	527	816
Average Recorded Investment	1,249	493
Interest Income Recognized	11	5
Residential real estate
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	9,895	6,889
Recorded Investment With Allowance	51	53
Recorded Investment Without Allowance	9,034	6,372
Total Recorded Investment	9,085	6,425
Related Allowance	9	9
Average Recorded Investment	2,996	3,543
Interest Income Recognized	160	272
Home equity lines of credit
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	429	500
Recorded Investment With Allowance	0	0
Recorded Investment Without Allowance	427	498
Total Recorded Investment	427	498
Related Allowance	0	0
Average Recorded Investment	156	298
Interest Income Recognized	51	18
Consumer
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	155	155
Recorded Investment With Allowance	0	0
Recorded Investment Without Allowance	149	150
Total Recorded Investment	149	150
Related Allowance	0	0
Average Recorded Investment	60	109
Interest Income Recognized	$41	$11

Loans_Troubled_Debt_Restructur

Loans (Troubled Debt Restructurings) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
	contract	contract
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Impaired, Commitment to Lend	$0
Originated Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	51,000
Financing Receivable, Modifications, Subsequent Default, Determination of Allowance for Credit Losses	0	0
Originated Loan [Member] | Commercial real estate, other
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period	0	1
Recorded Investment, Pre-Modification	0	511,000
Recorded Investment, Post-Modification	0	511,000
Total Recorded Investment	0	503,000
Originated Loan [Member] | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period	0	8
Recorded Investment, Pre-Modification	0	496,000
Recorded Investment, Post-Modification	0	497,000
Total Recorded Investment	0	496,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	51,000
Originated Loan [Member] | Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period	5	2
Recorded Investment, Pre-Modification	217,000	47,000
Recorded Investment, Post-Modification	217,000	47,000
Total Recorded Investment	217,000	47,000
Financing Receivable, Modifications, Subsequent Default, Determination of Allowance for Credit Losses	0	0
Originated Loan [Member] | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period	1	5
Recorded Investment, Pre-Modification	3,000	64,000
Recorded Investment, Post-Modification	3,000	64,000
Total Recorded Investment	3,000	64,000
Acquired Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	40,000
Financing Receivable, Modifications, Subsequent Default, Determination of Allowance for Credit Losses	0	0
Acquired Loans [Member] | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period	4
Recorded Investment, Pre-Modification	419,000
Recorded Investment, Post-Modification	419,000
Total Recorded Investment	419,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$0	$40,000
Acquired Loans [Member] | Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Determination of Allowance for Credit Losses	0	0

Loans_Summary_Of_Activity_In_A

Loans (Summary Of Activity In Allowance For Loan And Lease Losses) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$17,881	$17,065
Charge-offs	-584	-618
Recoveries	441	415
Net recoveries (charge-offs)	-143	-203
(Recovery of) provision for loan losses	350	8
Ending balance	18,088	16,870
Period-end amount allocated to:
Loans individually evaluated for impairment	725	637
Loans collectively evaluated for impairment	17,363	16,233
Ending balance	18,088	16,870
Commercial real estate, other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	9,825	13,215
Charge-offs	-10	0
Recoveries	55	112
Net recoveries (charge-offs)	45	112
(Recovery of) provision for loan losses	-796	0
Ending balance	9,074	13,327
Period-end amount allocated to:
Loans individually evaluated for impairment	189	111
Loans collectively evaluated for impairment	8,885	13,216
Ending balance	9,074	13,327
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	4,036	2,174
Charge-offs	0	-49
Recoveries	12	5
Net recoveries (charge-offs)	12	-44
(Recovery of) provision for loan losses	1,059	0
Ending balance	5,107	2,130
Period-end amount allocated to:
Loans individually evaluated for impairment	527	526
Loans collectively evaluated for impairment	4,580	1,604
Ending balance	5,107	2,130
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	1,627	881
Charge-offs	-186	-137
Recoveries	115	38
Net recoveries (charge-offs)	-71	-99
(Recovery of) provision for loan losses	4	0
Ending balance	1,560	782
Period-end amount allocated to:
Loans individually evaluated for impairment	9	0
Loans collectively evaluated for impairment	1,551	782
Ending balance	1,560	782
Home equity lines of credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	694	343
Charge-offs	-58	-20
Recoveries	15	6
Net recoveries (charge-offs)	-43	-14
(Recovery of) provision for loan losses	57	0
Ending balance	708	329
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	708	329
Ending balance	708	329
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	1,587	316
Charge-offs	-187	-302
Recoveries	186	184
Net recoveries (charge-offs)	-1	-118
(Recovery of) provision for loan losses	-74	0
Ending balance	1,512	198
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	1,512	198
Ending balance	1,512	198
Deposit account overdrafts
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	112	136
Charge-offs	-143	-110
Recoveries	58	70
Net recoveries (charge-offs)	-85	-40
(Recovery of) provision for loan losses	100	8
Ending balance	127	104
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	127	104
Ending balance	$127	$104

LongTerm_Borrowings_Details

Long-Term Borrowings (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Term note payable (parent company)	$13,174	$14,369
Weighted- Average Rate	3.50%	3.50%	3.50%	3.80%
Callable national market repurchase agreements	40,000	40,000
Weighted- Average Rate	3.63%	3.63%
Junior Subordinated Notes	6,587	0
Long-term borrowings	130,074	179,083
Long-term borrowings, Weighted-Average Rate	3.24%	3.12%
Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member]
Debt Instrument [Line Items]
FHLB Advances	50,000	83,995
Weighted- Average Rate	3.32%	3.30%
Federal Home Loan Bank Advances, Fixed Rate, Amortizing [Member]
Debt Instrument [Line Items]
FHLB Advances	$20,313	$40,719
Weighted- Average Rate	2.61%	2.13%
Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	1.76%	0.00%

LongTerm_Borrowings_Narrative_

Long-Term Borrowings (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended	9 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Mar. 06, 2015	Dec. 31, 2013
Proceeds from Issuance of Unsecured Debt		$24,000,000
Maturity Period of Long-Term Borrowing		5 years
Weighted- Average Rate	3.50%	3.50%	3.50%		3.80%
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%
Fixed charge coverage ratio minimum required by debt covenant			125.00%
Other Restricted Assets			2,000,000
Allowance for Loan Losses to Nonperforming Loans Minimum Under Debt Covenant			70.00%
Gains (Losses) on Extinguishment of Debt	520,000
Junior Subordinated Notes	6,587,000	0
Interest rate on capital securities				0.00%
Minimum
Repurchase Agreements, Maturities Period			5 years
Repurchase Agreements, Call Option Features at Buyer Discretion, Initial Call Period			3 months
Maximum
Repurchase Agreements, Maturities Period			10 years
Repurchase Agreements, Call Option Features at Buyer Discretion, Initial Call Period			5 years
Federal Home Loan Bank Advances, Fixed Rate, Amortizing [Member]
Weighted- Average Rate	2.61%	2.13%
Federal Home Loan Bank Advances, Fixed Rate, Amortizing [Member] | Minimum
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Maturities Period			10 years
Federal Home Loan Bank Advances, Fixed Rate, Amortizing [Member] | Maximum
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Maturities Period			20 years
Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member]
Weighted- Average Rate	3.32%	3.30%
Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member] | Minimum
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Maturities Period			10 years
Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member] | Maximum
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Maturities Period			20 years
Federal Home Loan Bank Advances, Convertible Rate Advances [Member] | Minimum
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Fixed Rate Initial Period			3 months
Federal Home Loan Bank Advances, Convertible Rate Advances [Member] | Maximum
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Fixed Rate Initial Period			5 years
Repayments of debt [Member] | Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member]
Extinguishment of Debt, Amount	52,100,000
Weighted- Average Rate	1.49%
NB&T Financial Group, Inc. [Member]
Junior Subordinated Notes				6,600,000

LongTerm_Borrowings_Maturity_D

Long-Term Borrowings Maturity (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
Nine Months Ending December 31, 2015	$6,819
Weighted-Average Rate	2.91%
Year Ending December 31, 2016	7,734
Weighted-Average Rate	3.07%
Year Ending December 31, 2017	7,126
Weighted-Average Rate	3.16%
Year Ending December 31, 2018	42,390
Weighted-Average Rate	3.33%
Year Ending December 31, 2019	41,426
Weighted-Average Rate	3.59%
Thereafter	24,579
Weighted-Average Rate	2.69%
Long-term borrowings	$130,074	$179,083
Weighted-Average Rate	3.24%	3.12%

Stockholders_Equity_Narrative_

Stockholders' Equity (Narrative) (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Stock Issued During Period, Value, Acquisitions	$76,027
Preferred stock - shares issued	0	0
Preferred stock - shares authorized	50,000	50,000
NB&T Financial Group, Inc. [Member]
Class of Stock [Line Items]
NB&T Financial Group, Inc.	3,207,698
Common Stock | NB&T Financial Group, Inc. [Member]
Class of Stock [Line Items]
Stock Issued During Period, Value, Acquisitions	$76,027

Stockholders_Equity_Stock_Roll

Stockholders' Equity (Stock Rollforward) (Details)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Increase (Decrease) in Stock by Class [Roll Forward]
Common stock, beginning of period		15,426,973
Treasury stock, beginning of period		590,246
Changes related to deferred compensation plan for Boards of Directors:
Common stock, end of period	18,918,525	15,426,973
Treasury stock, end of period	599,738	590,246
Common Stock
Increase (Decrease) in Stock by Class [Roll Forward]
Common stock, beginning of period	15,599,643
Changes related to stock-based compensation awards:
Grants of restricted common shares	107,036
Changes related to deferred compensation plan for Boards of Directors:
Common shares issued under dividend reinvestment plan	4,148
Common stock, end of period	18,918,525
Treasury Stock
Increase (Decrease) in Stock by Class [Roll Forward]
Treasury stock, beginning of period	590,246
Changes related to stock-based compensation awards:
Release of restricted common shares	21,636
Changes related to deferred compensation plan for Boards of Directors:
Purchase of treasury stock	1,256
Reissuance of treasury stock	-8,125
Common shares issued under compensation plan for Board of Directors	-2,100
Common shares issued under employee stock purchase plan	-3,175
Treasury stock, end of period	599,738
Treasury Stock | Stock Options
Changes related to stock-based compensation awards:
Treasury Stock, Value	0
NB&T Financial Group, Inc. [Member]
Changes related to deferred compensation plan for Boards of Directors:
NB&T Financial Group, Inc.	3,207,698
NB&T Financial Group, Inc. [Member] | Common Stock
Changes related to deferred compensation plan for Boards of Directors:
NB&T Financial Group, Inc.	3,207,698

Stockholders_Equity_Accumulate

Stockholders' Equity (Accumulated Other Comprehensive (Loss) Income) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Unrealized Gain on Securities	$2,542
Realized gain on sale of securities, net of tax	-390
Other comprehensive income, net of reclassifications and tax	5,775
Unrealized Gain on Securities	7,927
Unrecognized Net Pension and Postretirement Costs	-3,843
Realized loss due to settlement and curtailment, net of tax	175
Other comprehensive income, net of reclassifications and tax	3
Unrecognized Net Pension and Postretirement Costs	-3,665
Accumulated Other Comprehensive (Loss) Income	-1,301
Realized gain on sale of securities, net of tax	-390
Realized loss due to settlement and curtailment, net of tax	175
Other comprehensive income, net of reclassifications and tax	5,778
Accumulated Other Comprehensive (Loss) Income	$4,262

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Projected benefit obligation	$13,278		$13,695
Before Settlement	13,903
Impact of Settlements	-625
Fair value of plan assets	7,829		8,259
Before Settlement	8,454
Impact of Settlements	-625
Funded status	-5,449		-5,436
Gross unrealized loss (gain)	5,705		5,979
Before Settlement	5,974
Discount rate	3.40%		3.50%
Expected return on plan assets	7.50%		7.50%
Components of net periodic benefit costs:
Interest cost	115	143
Expected return on plan assets	-130	-169
Amortization of net loss	33	33
Settlement of benefit obligation	-269	-486
Net periodic benefit cost	287	493
Other Postretirement Benefit Plans, Defined Benefit [Member]
Components of net periodic benefit costs:
Interest cost	1	1
Amortization of net loss	-1	-2
Net periodic benefit cost	$0	($1)
Other Postretirement Benefit Plans, Defined Benefit [Member] | Employees Hired before January 1, 2003 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Benefit based on highest average salary for number of consecutive years	5 years
Number of years for consecutive years calculation	10 years
Other Postretirement Benefit Plans, Defined Benefit [Member] | Employees Hired on or after January 1, 2003 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Percent of annual salary to calculate benefit	2.00%

Earnings_Per_Common_Share_Calc

Earnings Per Common Share (Calculations of Basic and Diluted Earnings per Common Share) (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Distributed earnings allocated to shareholders	$2,243	$1,605
Undistributed earnings allocated to shareholders	-2,941	3,146
Net earnings allocated to shareholders	($698)	$4,751
Weighted-average number of common shares outstanding - basic	15,802,334	10,636,089
Effect of potentially dilutive shares	127,901	104,795
Total weighted-average diluted shares outstanding	15,930,235	10,740,884
(Loss) earnings per common share - basic	($0.04)	$0.45
(Loss) earnings per common share - diluted	($0.04)	$0.44
Anti-dilutive shares excluded from computation of EPS	42,584	73,422

StockBased_Compensation_Narrat

Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under 2006 Equity Plan	1,081,260
Common shares authorized under the 2006 Equity Plan	800,000
Unrecognized stock-based compensation expense related to unvested awards, amount	$2.80
Unrecognized stock-based compensation expense related to unvested awards, weighted-average period of recognition	2 years 5 months 1 day
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period	10 years
Stock Options | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period	3 years
Stock Options | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period	6 months
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	$1.70
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

StockBased_Compensation_Option

Stock-Based Compensation (Options Outstanding & Exercisable) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Number of Common Shares Subject to Options
Outstanding at January 1	38,577
Expired	8,482
31-Mar-15	30,095
Weighted-Average Exercise Price
Outstanding at January 1	$28.09
Expired	$27.38
31-Mar-15	$28.29
Stock Options
Weighted-average remaining contractual life, outstanding	0 years 10 months 1 day
Aggregate intrinsic value, outstanding	$0
Number of common shares subject to options, exercisable	30,095
Weighted-average exercise price, exercisable	$28.29
Weighted-average remaining contractual life, exercisable	0 years 10 months 1 day
Aggregate intrinsic value, exercisable	$0
Common Shares Subject to Options Outstanding & Exercisable	30,095
Weighted-Average Remaining Contractual Life	0 years 9 months 1 day
Weighted-Average Exercise Price	$28.29
Range of Exercise Price $26.01 - $27.74
Stock Options
Range of exercise prices, minimum	$26.01
Range of exercise prices, maximum	$27.74
Common Shares Subject to Options Outstanding & Exercisable	5,198
Weighted-Average Remaining Contractual Life	0 years 0 months 1 day
Weighted-Average Exercise Price	$26.01
Range of Exercise Price $28.25 - $28.26
Stock Options
Range of exercise prices, minimum	$28.25
Range of exercise prices, maximum	$28.26
Common Shares Subject to Options Outstanding & Exercisable	13,697
Weighted-Average Remaining Contractual Life	0 years 11 months 1 day
Weighted-Average Exercise Price	$28.25
Range of Exercise Price $28.57 - $30.00
Stock Options
Range of exercise prices, minimum	$28.57
Range of exercise prices, maximum	$30
Common Shares Subject to Options Outstanding & Exercisable	11,200
Weighted-Average Remaining Contractual Life	1 year 1 month
Weighted-Average Exercise Price	$29.40

StockBased_Compensation_Stock_

Stock-Based Compensation (Stock Appreciation Rights) (Details) (SARs, USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Stock Appreciation Rights
Shares outstanding	21,292	21,292
Number of Common Shares Subject to SARs Outstanding & Exercisable	21,292
Weighted- Average Remaining Contractual Life	2 years 3 months 1 day
Outstanding shares, weighted-average exercise price	$25.96	$25.96
Shares outstanding, weighted-average remaining contractual life	2 years 4 months 1 day
Shares outstanding, aggregate intrinsic value	$1,000
Shares exercisable	21,292
Shares exercisable, weighted-average exercise price	$25.96
Shares exercisable, weighted-average remaining contractual life	2 years 4 months 1 day
Shares exercisable, aggregate intrinsic value	$1,000
Exercise Price $23.26
Stock Appreciation Rights
Exercise Price	$23.26
Number of Common Shares Subject to SARs Outstanding & Exercisable	2,000
Weighted- Average Remaining Contractual Life	2 years 3 months 1 day
Exercise Price $23.77
Stock Appreciation Rights
Exercise Price	$23.77
Number of Common Shares Subject to SARs Outstanding & Exercisable	10,582
Weighted- Average Remaining Contractual Life	2 years 8 months 1 day
Exercise Price $29.25
Stock Appreciation Rights
Exercise Price	$29.25
Number of Common Shares Subject to SARs Outstanding & Exercisable	8,710
Weighted- Average Remaining Contractual Life	1 year 9 months 1 day

StockBased_Compensation_Restri

Stock-Based Compensation (Restricted Shares) (Details) (Restricted Shares, USD $)	3 Months Ended
	Mar. 31, 2015
Time-Based Vesting
Number of Shares
Outstanding at January 1	47,591
Awarded	0
Released	23,712
Forfeited	500
31-Mar-15	23,379
Weighted - Average Grant Date Fair Value
Outstanding at January 1	$19.48
Awarded	$0
Released	$15.70
Forfeited	$15.64
31-Mar-15	$23.39
Performance-Based Vesting
Number of Shares
Outstanding at January 1	125,079
Awarded	107,961
Released	49,058
Forfeited	425
31-Mar-15	183,557
Weighted - Average Grant Date Fair Value
Outstanding at January 1	$21.73
Awarded	$23.63
Released	$21.74
Forfeited	$21.79
31-Mar-15	$22.84

StockBased_Compensation_StockB

Stock-Based Compensation (Stock-Based Compensation and Related Tax Benefit) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation [Abstract]
Total stock-based compensation	$565	$490
Recognized tax benefit	-198	-172
Net expense recognized	$367	$318

Acquisitions_Narrative_Details

Acquisitions (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 06, 2015
Acquisition
Non-interest expense related to acquisitions	$9,000,000
Net loss on assets acquired	-1,103,000	11,000
NB&T Financial Group, Inc. [Member]
Acquisition
Total purchase price	102,700,000
Outstanding shares			3,442,329
Cash purchase price			$23.70
Number of common shares of Peoples issued for each common share of acquired company			0.9319
Deposits			629,512,000
Net loss on assets acquired	600,000
Cash Portion of Purchase Price [Member] | NB&T Financial Group, Inc. [Member]
Acquisition
Cash purchase price			$7.75
Loans [Member] | NB&T Financial Group, Inc. [Member]
Acquisition
Fair value			$389,985,000

Acquisitions_Acquisitions_Purc1

Acquisitions Acquisitions Purchase Price and Fair Value of Assets Acquired and Liabilities Assumed (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 06, 2015
Net Assets at Fair Value [Roll Forward]
Goodwill	$124,660,000	$98,562,000
NB&T Financial Group, Inc. [Member]
Purchase Price [Roll Forward]
Common shares outstanding of acquired company at acquisition date			3,442,329
Cash purchase price			$23.70
Number of common shares of Peoples issued for each common share of acquired company			0.9319
Total purchase price	102,700,000
Net Assets at Fair Value [Roll Forward]
Cash and cash equivalents			130,275,000
Bank premises and equipment, net			10,702,000
Other intangible assets			8,868,000
Other assets			24,070,000
Total assets			720,292,000
Deposits			629,512,000
Borrowings			6,570,000
Accrued expenses and other liabilities			7,603,000
Total liabilities			643,685,000
Net assets			76,607,000
Goodwill			26,098,000
Cash Portion of Purchase Price [Member] | NB&T Financial Group, Inc. [Member]
Purchase Price [Roll Forward]
Cash purchase price			$7.75
Purchase price			26,678,000
Stock Portion of Purchase Price [Member] | NB&T Financial Group, Inc. [Member]
Purchase Price [Roll Forward]
Purchase price			76,027,000
Debt Securities [Member] | NB&T Financial Group, Inc. [Member]
Net Assets at Fair Value [Roll Forward]
Debt securities and loans			156,392,000
Loans [Member] | NB&T Financial Group, Inc. [Member]
Net Assets at Fair Value [Roll Forward]
Debt securities and loans			$389,985,000

Acquisitions_Acquisitions_Fair1

Acquisitions Acquisitions, Fair Value of Loans Acquired (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 06, 2015
In Thousands, unless otherwise specified
Acquisition
Accretable yield	($8,756)	($3,172)
NB&T Financial Group, Inc. [Member]
Acquisition
Accretable yield	-4,783
Acquired Nonimpaired Loans [Member] | NB&T Financial Group, Inc. [Member]
Acquisition
Contractual cash flows			541,292
Nonaccretable difference			76,853
Expected cash flows			464,439
Accretable yield			99,678
Fair value			364,761
Acquired Purchased Credit Impaired Loans [Member] | NB&T Financial Group, Inc. [Member]
Acquisition
Nonaccretable difference			14,929
Contractual cash flows			44,936
Expected cash flows			30,007
Accretable yield			4,783
Fair value			$25,224

Acquisitions_Goodwill_Details

Acquisitions Goodwill (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 06, 2015
Goodwill and Intangible Assets
Goodwill, beginning balance		$98,562
Goodwill, ending balance	124,660	98,562
Goodwill [Member]
Goodwill and Intangible Assets
Goodwill, beginning balance		98,562
Goodwill, ending balance	124,660	98,562
Gross Core Deposit [Member]
Goodwill and Intangible Assets
Gross Intangible Assets		13,546
Gross Intangible Assets	22,169	13,546
Gross Customer Relationship [Member]
Goodwill and Intangible Assets
Gross Intangible Assets		8,859
Gross Intangible Assets	8,859	8,859
NB&T Financial Group, Inc. [Member]
Goodwill and Intangible Assets
Goodwill, beginning balance			26,098
Goodwill, ending balance			26,098
NB&T Financial Group, Inc. [Member] | Goodwill [Member]
Goodwill and Intangible Assets
Acquired goodwill	26,098
NB&T Financial Group, Inc. [Member] | Gross Core Deposit [Member]
Goodwill and Intangible Assets
Acquired intangible assets	8,623
NB&T Financial Group, Inc. [Member] | Gross Customer Relationship [Member]
Goodwill and Intangible Assets
Acquired intangible assets	$0

Acquisitions_Intangibles_Detai

Acquisitions Intangibles (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Intangible Assets
Other intangible assets	$18,777	$10,596
Core deposits
Intangible Assets
Gross Intangible Assets	22,169
Accumulated Amortization	-8,232
Other intangible assets	13,937
Customer relationships
Intangible Assets
Gross Intangible Assets	8,859
Accumulated Amortization	-6,488
Other intangible assets	2,371
Total acquired intangible assets
Intangible Assets
Gross Intangible Assets	31,028
Accumulated Amortization	-14,720
Other intangible assets	16,308
Servicing rights
Intangible Assets
Other intangible assets	$2,469