Peoples Bancorp (PEBO) 10-Q 24 Oct 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 23, 2013
Entity Information [Line Items]
Entity Registrant Name	PEOPLES BANCORP INC.
Entity Central Index Key	318300
Document Type	10-Q
Document Period End Date	30-Sep-13
Amendment Flag	FALSE
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	-19
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		10,810,596

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Cash and cash equivalents:
Cash and due from banks	$41,348	$47,256
Interest-bearing deposits in other banks	9,312	15,286
Total cash and cash equivalents	50,660	62,542
Available-for-sale investment securities, at fair value (amortized cost of $623,024 at September 30, 2013 and $628,584 at December 31, 2012)	616,036	639,185
Held-to-maturity investment securities, at amortized cost (fair value of $48,629 at September 30, 2013 and $47,124 at December 31, 2012)	49,758	45,275
Other investment securities, at cost	24,679	24,625
Total investment securities	690,473	709,085
Loans, net of deferred fees and costs	1,057,165	985,172
Allowance for loan losses	-16,902	-17,811
Net loans	1,040,263	967,361
Loans held for sale	3,179	6,546
Bank premises and equipment, net	28,990	27,013
Bank owned life insurance	1,865	51,229
Goodwill	65,786	64,881
Other intangible assets	5,631	3,644
Other assets	32,858	25,749
Total assets	1,919,705	1,918,050
Deposits:
Non-Interest-Bearing Deposits	356,767	317,071
Interest-bearing Deposits	1,081,099	1,175,232
Total deposits	1,437,866	1,492,303
Short-term borrowings	106,843	47,769
Long-term borrowings	124,146	128,823
Accrued expenses and other liabilities	28,603	27,427
Total liabilities	1,697,458	1,696,322
Stockholders’ Equity
Preferred stock, no par value, 50,000 shares authorized, no shares issued at September 30, 2013 and December 31, 2012	0	0
Common stock, no par value, 24,000,000 shares authorized, 11,197,041 shares issued at September 30, 2013 and 11,155,648 shares issued at December 31, 2012, including shares in treasury	168,457	167,039
Retained earnings	77,298	69,158
Accumulated other comprehensive income (loss), net of deferred income taxes	-8,545	654
Treasury stock, at cost, 600,244 shares at September 30, 2013 and 607,688 shares at December 31, 2012	-14,963	-15,123
Total stockholders’ equity	222,247	221,728
Total liabilities and stockholders’ equity	$1,919,705	$1,918,050

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Assets
Available for sale securities, amortized cost	$623,024	$628,584
Held to maturity securities, fair value	$48,629	$47,124
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	11,197,041	11,155,648
Treasury stock, shares	600,244	607,688

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest Income:
Interest and fees on loans	$11,958	$11,911	$34,945	$35,714
Interest and dividends on taxable investment securities	4,119	4,658	12,493	15,104
Interest on tax-exempt investment securities	410	368	1,183	1,064
Other interest income	22	5	65	13
Total interest income	16,509	16,942	48,686	51,895
Interest Expense:
Interest on deposits	1,674	2,171	5,411	7,007
Interest on short-term borrowings	28	19	63	57
Interest on long-term borrowings	1,131	936	3,406	2,984
Interest on junior subordinated notes held by subsidiary trust	0	495	0	1,482
Total interest expense	2,833	3,621	8,880	11,530
Net interest income	13,676	13,321	39,806	40,365
(Recovery of) provision for loan losses	-919	-956	-3,446	-4,213
Net interest income after (recovery of) provision for loan losses	14,595	14,277	43,252	44,578
Other Income:
Insurance income	3,261	2,367	9,359	7,756
Deposit account service charges	2,377	2,261	6,479	6,728
Trust and investment income	1,751	1,565	5,225	4,510
Electronic banking income	1,547	1,484	4,527	4,436
Mortgage banking income	360	638	1,443	1,869
Net (loss) gain on investment securities	-1	112	443	3,275
Net loss on asset disposals and other transactions	-19	-161	-30	-3,266
Other non-interest income	290	257	841	853
Total other income	9,566	8,523	28,287	26,161
Other Expenses:
Salaries and employee benefit costs	9,358	8,051	27,009	24,711
Net occupancy and equipment	1,637	1,423	5,121	4,358
Professional fees	1,188	1,172	3,084	3,189
Electronic banking expense	920	887	2,645	2,451
Marketing expense	547	534	1,559	1,490
Data processing and software	530	470	1,479	1,442
Franchise tax	412	415	1,238	1,241
Communication expense	342	294	1,006	930
FDIC insurance	224	257	754	789
Foreclosed real estate and other loan expenses	243	263	683	739
Amortization of other intangible assets	180	134	533	350
Other non-interest expense	1,682	1,766	4,759	4,678
Total other expenses	17,263	15,666	49,870	46,368
Income before income taxes	6,898	7,134	21,669	24,371
Income tax expense	4,381	2,310	9,209	7,860
Net income	2,517	4,824	12,460	16,511
Earnings per common share - basic	$0.24	$0.45	$1.17	$1.56
Earnings per common share - diluted	$0.23	$0.45	$1.16	$1.56
Weighted-average shares outstanding	10,589,126	10,530,800	10,574,130	10,522,874
Weighted-average diluted shares outstanding	10,692,555	10,530,876	10,664,999	10,522,905
Cash dividends declared	$1,513	$1,175	$4,320	$3,522
Cash dividends declared per share	$0.14	$0.11	$0.40	$0.33

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$2,517	$4,824	$12,460	$16,511
Available-for-sale investment securities:
Gross unrealized holding gain arising in the period	-876	-107	-17,146	1,468
Related tax expense	307	37	6,001	-514
Less: reclassification adjustment for net gain included in net income	-1	112	443	3,275
Related tax expense on reclassification adjustment	0	-39	-155	-1,146
Net effect on other comprehensive income (loss)	-568	-143	-11,433	-1,175
Defined benefit plans:
Net loss arising during the period	3,023	0	3,023	318
Related tax benefit	-1,058	0	-1,058	-111
Amortization of unrecognized loss and service cost on pension plan	50	41	149	119
Related tax expense on amortization	-17	-14	-52	-41
Recognition of loss due to settlement and curtailment	264	0	264	353
Related tax expense	-92	0	-92	-124
Net effect on other comprehensive income (loss)	-2,170	-27	-2,234	-514
Total other comprehensive income (loss), net of tax	1,602	-116	-9,199	-661
Total comprehensive income	$4,119	$4,708	$3,261	$15,850

Consolidated_Statement_of_Shar

Consolidated Statement of Shareholders' Equity (USD $)	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
In Thousands, unless otherwise specified
Balance at beginning of period at Dec. 31, 2012	$221,728	$167,039	$69,158	$654	($15,123)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,460		12,460
Other comprehensive loss, net of tax	-9,199			-9,199
Common stock cash dividends declared	-4,320		-4,320
Tax benefit from exercise of stock options	73	73
Reissuance of treasury stock for deferred compensation plan	169				169
Purchase of treasury stock	-166				-166
Common shares issued under dividend reinvestment plan	318	318
Common shares issued under Board of Directors' compensation plan	132	-25			157
Stock based compensation expense	1,052	1,052
Balance at end of period at Sep. 30, 2013	$222,247	$168,457	$77,298	($8,545)	($14,963)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Statement of Cash Flows [Abstract]
Net cash provided by operating activities	$32,123	$22,806
Available-for-sale investment securities:
Purchases	-206,331	-190,531
Proceeds from sales	121,117	113,720
Proceeds from principal payments, calls and prepayments	82,247	111,377
Held-to-maturity securities:
Purchases	-5,216	-23,791
Proceeds from principle payments	455	7,387
Net (increase) decrease in loans	-68,729	-20,449
Net expenditures for premises and equipment	-4,777	-2,331
Proceeds from sales of other real estate owned	922	1,387
Proceeds from bank owned life insurance contracts	42,837	0
Business acquisitions, net of cash received	-2,248	-3,321
Investment in limited partnership and tax credit funds	-120	-187
Net cash provided by (used in) investing activities	-39,843	-6,739
Financing activities
Net increase in non-interest-bearing deposits	39,696	34,742
Net increase (decrease) in interest-bearing deposits	-94,140	27,190
Net (decrease) increase in short-term borrowings	59,074	-13,992
Payments on long-term borrowings	-4,698	-39,152
Repurchase of preferred shares and common stock warrant	0	-1,201
Cash dividends paid on common shares	-4,007	-3,265
Purchase of treasury stock	-166	-80
Proceeds from issuance of common shares	6	5
Excess tax benefit from share-based payments	73	13
Net cash provided by (used in) financing activities	-4,162	4,260
Net increase (decrease) in cash and cash equivalents	-11,882	20,327
Cash and cash equivalents at beginning of period	62,542	38,950
Cash and cash equivalents at end of period	$50,660	$59,277

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
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. ("Peoples") and its subsidiaries 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, 2012 (“2012 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’ 2012 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 September 30, 2013, 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, 2012, contained herein has been derived from the audited Consolidated Balance Sheet included in Peoples’ 2012 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.
	New Accounting Pronouncements: In February 2013, the Financial Accounting Standards Board issued an accounting standards update with new guidance on the presentation of accumulated other comprehensive income (“AOCI”). This standard was effective for public companies for interim and annual periods beginning after December 15, 2012. The amendment requires an entity to present the reclassification adjustments out of AOCI and into net income for each component reported. These amounts may be disclosed before-tax or after-tax, and must be disclosed in either the income statement or the notes to the financial statements. This update is intended to supplement changes made in 2012 to increase the prominence of items reported in other comprehensive income. Peoples adopted this new guidance on January 1, 2013, as required. As a result of the adoption, the disclosure of AOCI included in Note 6 contains additional information regarding reclassifications out of AOCI and into net income.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2013
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 at September 30, 2013:
				Fair Value Measurements 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)
	September 30, 2013
	Obligations of:
	U.S. Treasury and government agencies	$	22	$	—	$	22		$	—
	U.S. government sponsored agencies	356		—		356			—
	States and political subdivisions	51,061		—		51,061			—
	Residential mortgage-backed securities	519,387		—		519,387			—
	Commercial mortgage-backed securities	33,135		—		33,135			—
	Bank-issued trust preferred securities	7,868		—		7,868			—
	Equity securities	4,207		4,073		134			—
	Total available-for-sale securities	$	616,036	$	4,073	$	611,963		$	—
	December 31, 2012
	Obligations of:
	U.S. Treasury and government agencies	$	26	$	—	$	26		$	—
	U.S. government sponsored agencies	516		—		516			—
	States and political subdivisions	45,668		681		44,987			—
	Residential mortgage-backed securities	514,096		—		514,096			—
	Commercial mortgage-backed securities	64,416		—		64,416			—
	Bank-issued trust preferred securities	10,357		—		10,357			—
	Equity securities	4,106		3,971		135			—
	Total available-for-sale securities	$	639,185	$	4,652	$	634,533		$	—
	Held-to-maturity securities reported at fair value comprised the following at September 30, 2013:
				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)
	September 30, 2013
	Obligations of:
	States and political subdivisions	$	3,973	$	—	$	3,973		$	—
	Residential mortgage-backed securities	36,898		—		36,898			—
	Commercial mortgage-backed securities	7,758		—		7,758			—
	Total held-to-maturity securities	$	48,629	$	—	$	48,629		$	—
	December 31, 2012
	Obligations of:
	States and political subdivisions	$	4,250	$	—	$	4,250		$	—
	Residential mortgage-backed securities	34,560		—		34,560			—
	Commercial mortgage-backed securities	8,314		—		8,314			—
	Total held-to-maturity securities	$	47,124	$	—	$	47,124		$	—
	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).
	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 September 30, 2013, impaired loans with an aggregate outstanding principal balance of $2.6 million were measured and reported at a fair value of $2.2 million.  For the three months ended September 30, 2013, Peoples recognized $0.1 million of losses and for the nine months ended September 30, 2013, Peoples recognized losses of $0.4 million, 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:
		September 30, 2013					December 31, 2012
	(Dollars in thousands)	Carrying Amount		Fair Value			Carrying Amount			Fair Value
	Financial assets:
	Cash and cash equivalents	$	50,660	$	50,660		$	62,542		$	62,542
	Investment securities	690,473		689,344			709,085			710,934
	Loans	1,043,442		971,413			973,907			897,132
	Financial liabilities:
	Deposits	$	1,437,866	$	1,444,517		$	1,492,303		$	1,503,098
	Short-term borrowings	106,843		106,843			47,769			47,769
	Long-term borrowings	124,146		131,103			128,823			141,691
	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 2 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 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	9 Months Ended
	Sep. 30, 2013
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
	September 30, 2013
	Obligations of:
	U.S. Treasury and government agencies	$	22		$	—		$	—		$	22
	U.S. government sponsored agencies	341			15			—			356
	States and political subdivisions	50,495			1,700			(1,134		)	51,061
	Residential mortgage-backed securities	528,634			6,176			(15,423		)	519,387
	Commercial mortgage-backed securities	33,813			289			(967		)	33,135
	Bank-issued trust preferred securities	8,503			—			(635		)	7,868
	Equity securities	1,216			3,077			(86		)	4,207
	Total available-for-sale securities	$	623,024		$	11,257		$	(18,245	)	$	616,036
	December 31, 2012
	Obligations of:
	U.S. Treasury and government agencies	$	26		$	—		$	—		$	26
	U.S. government sponsored agencies	486			30			—			516
	States and political subdivisions	42,458			3,292			(82		)	45,668
	Residential mortgage-backed securities	511,305			12,558			(9,767		)	514,096
	Commercial mortgage-backed securities	62,129			2,330			(43		)	64,416
	Bank-issued trust preferred securities	10,966			73			(682		)	10,357
	Equity securities	1,214			2,977			(85		)	4,106
	Total available-for-sale securities	$	628,584		$	21,260		$	(10,659	)	$	639,185
	Peoples’ investment in equity securities was comprised largely of common stocks issued by various unrelated bank holding companies at both September 30, 2013 and December 31, 2012.  During the third quarter of 2013, Peoples also classified certain mutual funds as equity securities, which are intended for the payment of benefits under a deferred compensation plan for certain key officers of Peoples. At September 30, 2013, there were no securities of a single issuer, other than U.S. Treasury and government agencies and U.S. government sponsored agencies, 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 September 30 were as follows:
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
	(Dollars in thousands)	2013			2012				2013			2012
	Gross gains realized	$	—		$	761			$	3,312		$	4,033
	Gross losses realized	1			649				2,869			758
	Net (loss) gain realized	$	(1	)	$	112			$	443		$	3,275
	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
	September 30, 2013
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	—		—			$	—		$	—		—	$	—	$	—
	U.S. government sponsored agencies	—			—			—			—			—			—	—		—
	States and political subdivisions	21,026			1,134			30			—			—			—	21,026		1,134
	Residential mortgage-backed securities	334,362			12,090			77			37,716			3,333			12	372,078		15,423
	Commercial mortgage-backed securities	22,628			750			5			4,933			217			1	27,561		967
	Bank-issued trust preferred securities	3,037			75			2			4,831			560			4	7,868		635
	Equity securities	—			—			—			92			86			2	92		86
	Total	$	381,053		$	14,049		114			$	47,572		$	4,196		19	$	428,625	$	18,245
	December 31, 2012
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	—		—			$	—		$	—		—	$	—	$	—
	U.S. government sponsored agencies	—			—			—			—			—			—	—		—
	States and political subdivisions	4,558			82			8			—			—			—	4,558		82
	Residential mortgage-backed securities	135,250			2,326			28			89,958			7,441			20	225,208		9,767
	Commercial mortgage-backed securities	7,681			43			2			—			—			—	7,681		43
	Bank-issued trust preferred securities	2,376			18			2			5,434			664			5	7,810		682
	Equity securities	—			—			—			91			85			1	91		85
	Total	$	149,865		$	2,469		40			$	95,483		$	8,190		26	$	245,348	$	10,659
	Management systematically evaluates available-for-sale investment securities for other-than-temporary declines in fair value on a quarterly basis. At September 30, 2013, 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 September 30, 2013 and December 31, 2012, were largely attributable to changes in market interest rates and spreads since the securities were purchased.
	At September 30, 2013, approximately 93% 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 7%, or five positions, consisted of privately issued mortgage-backed securities with all of the underlying mortgages originated prior to 2004. Two of the five positions had a fair value less than 90% of their book value, with an aggregate book and fair value of $0.9 million and $0.8 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 four bank-issued trust preferred securities that had been in an unrealized loss position for twelve months or more at September 30, 2013 were primarily attributable to the floating nature of those investments, the current interest rate environment and spreads within that sector. The four securities had an aggregate book value of approximately $5.4 million and fair value of $4.8 million at September 30, 2013.
	The table below presents the amortized cost, fair value and weighted-average yield of available-for-sale securities by contractual maturity at September 30, 2013.  The 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	$	—		$	19		$	3		$	—		$	22
U.S. government sponsored agencies	—			341			—			—			341
States and political subdivisions	470			2,915			17,532			29,578			50,495
Residential mortgage-backed securities	77			6,007			41,100			481,450			528,634
Commercial mortgage-backed securities	—			5,285			23,177			5,351			33,813
Bank-issued trust preferred securities	—			—			—			8,503			8,503
Equity securities													1,216
Total available-for-sale securities	$	547		$	14,567		$	81,812		$	524,882		$	623,024
Fair value
Obligations of:
U.S. Treasury and government agencies	$	—		$	19		$	3		$	—		$	22
U.S. government sponsored agencies	—			356			—			—			356
States and political subdivisions	472			3,072			18,186			29,331			51,061
Residential mortgage-backed securities	78			6,262			40,025			473,022			519,387
Commercial mortgage-backed securities	—			5,574			22,244			5,317			33,135
Bank-issued trust preferred securities	—			—			—			7,868			7,868
Equity securities													4,207
Total available-for-sale securities	$	550		$	15,283		$	80,458		$	515,538		$	616,036
Total average yield	4.74		%	4.46		%	2.84		%	2.72		%	2.8		%
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
September 30, 2013
Obligations of:
States and political subdivisions	$	3,853		$	135		$	(15	)	$	3,973
Residential mortgage-backed securities	38,046			54			(1,202		)	36,898
Commercial mortgage-backed securities	7,859			10			(111		)	7,758
Total held-to-maturity securities	$	49,758		$	199		$	(1,328	)	$	48,629
December 31, 2012
Obligations of:
States and political subdivisions	$	3,860		$	390		$	—		$	4,250
Residential mortgage-backed securities	33,494			1,107			(41		)	34,560
Commercial mortgage-backed securities	7,921			393			—			8,314
Total held-to-maturity securities	$	45,275		$	1,890		$	(41	)	$	47,124
There were no gross gains or gross losses realized by Peoples from sales of held-to-maturity securities for the three and nine months ended September 30, 2013 and 2012.
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
September 30, 2013
Obligations of:
States and political subdivisions	$	867		$	15		2			$	—		$	—		—	$	867	$	15
Residential mortgage-backed securities	34,860			1,202			8			—			—			—	34,860		1,202
Commercial mortgage-backed securities	6,656			111			1			—			—			—	6,656		111
Total	$	42,383		$	1,328		11			$	—		$	—		—	$	42,383	$	1,328
December 31, 2012
Residential mortgage-backed securities	$	2,398		$	41		2			$	—		$	—		—	$	2,398	$	41
Commercial mortgage-backed securities	—			—			—			—			—			—	—		—
Total	$	2,398		$	41		2			$	—		$	—		—	$	2,398	$	41
The table below presents the amortized cost, fair value and weighted-average yield of held-to-maturity securities by contractual maturity at September 30, 2013.  The 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	$	—		$	—		$	336		$	3,517		$	3,853
Residential mortgage-backed securities	—			—			532			37,514			38,046
Commercial mortgage-backed securities	—			—			—			7,859			7,859
Total held-to-maturity securities	$	—		$	—		$	868		$	48,890		$	49,758
Fair value
Obligations of:
States and political subdivisions	$	—		$	—		$	325		$	3,648		$	3,973
Residential mortgage-backed securities	—			—			512			36,386			36,898
Commercial mortgage-backed securities	—			—			—			7,758			7,758
Total held-to-maturity securities	$	—		$	—		$	837		$	47,792		$	48,629
Total average yield	—		%	—		%	2.57		%	2.79		%	2.78		%
Pledged Securities
Peoples had pledged available-for-sale investment securities with a carrying value of $314.5 million and $260.9 million at September 30, 2013 and December 31, 2012, respectively, to secure public and trust department deposits and repurchase agreements in accordance with federal and state requirements.  Additionally, Peoples had pledged held-to-maturity investment securities with a carrying value of $21.4 million and $45.3 million at September 30, 2013 and December 31, 2012, 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 $17.4 million and $50.4 million at September 30, 2013 and December 31, 2012, respectively, and held-to-maturity securities with a carrying value of $26.3 million at September 30, 2013 to secure additional borrowing capacity at the Federal Home Loan Bank of Cincinnati ("FHLB") and the Federal Reserve Bank of Cleveland ("FRB").

Loans

Loans	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]
Loans	Loans
	Peoples' loan portfolio consists of various types of loans originated primarily as a result of lending opportunities within Peoples' primary market areas of central and southeastern Ohio, west central West Virginia, and northeastern Kentucky. The major classifications of loan balances, excluding loans held for sale, were as follows:
	(Dollars in thousands)	September 30,			December 31, 2012
		2013
	Commercial real estate, construction	$	39,969		$	34,265
	Commercial real estate, other	374,953			378,073
	Commercial real estate	414,922			412,338
	Commercial and industrial	192,238			180,131
	Residential real estate	262,602			233,841
	Home equity lines of credit	55,341			51,053
	Consumer	127,785			101,246
	Deposit account overdrafts	4,277			6,563
	Total loans	$	1,057,165		$	985,172
	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)	September 30,			December 31,
		2013			2012
	Commercial real estate	$	2,012		$	2,145
	Commercial and industrial	57			74
	Residential real estate	11,458			12,873
	Consumer	48			84
	Total outstanding balance	$	13,575		$	15,176
	Net carrying amount	$	13,091		$	14,700
	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 $233.8 million and $202.0 million at September 30, 2013 and December 31, 2012, respectively. Peoples also had pledged commercial loans to secure borrowings with the FRB. The outstanding balances of these loans totaled $148.9 million and $123.8 million at September 30, 2013 and December 31, 2012, 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 accruing loans delinquent for 90 days or more were as follows:
		Nonaccrual Loans							Accruing Loans 90+ Days Past Due
	(Dollars in thousands)	September 30,			December 31,				September 30,			December 31,
		2013			2012				2013			2012
	Commercial real estate, construction	$	76		$	—			$	—		$	—
	Commercial real estate, other	4,786			9,831				—			—
	Commercial real estate	4,862			9,831				—			—
	Commercial and industrial	323			627				950			181
	Residential real estate	3,207			3,136				—			—
	Home equity lines of credit	85			24				1,615			1,050
	Consumer	60			20				32			4
	Total	$	8,537		$	13,638			$	2,597		$	1,235
	The following table presents the aging of the recorded investment in past due loans and leases:
		Loans Past Due													Current			Total
	(Dollars in thousands)	30 - 59 days			60 - 89 days			90 + Days			Total				Loans			Loans
	September 30, 2013
	Commercial real estate, construction	$	—		$	—		$	—		$	—			$	39,969		$	39,969
	Commercial real estate, other	2,485			635			1,972			5,092				369,861			374,953
	Commercial real estate	2,485			635			1,972			5,092				409,830			414,922
	Commercial and industrial	4,324			—			1,177			5,501				186,737			192,238
	Residential real estate	2,565			1,317			1,790			5,672				256,930			262,602
	Home equity lines of credit	650			310			1,660			2,620				52,721			55,341
	Consumer	758			112			92			962				126,823			127,785
	Deposit account overdrafts	73			—			—			73				4,204			4,277
	Total	$	10,855		$	2,374		$	6,691		$	19,920			$	1,037,245		$	1,057,165
	December 31, 2012
	Commercial real estate, construction	$	—		$	77		$	—		$	77			$	34,188		$	34,265
	Commercial real estate, other	11,382			705			5,144			17,231				360,842			378,073
	Commercial real estate	11,382			782			5,144			17,308				395,030			412,338
	Commercial and industrial	3,841			116			294			4,251				175,880			180,131
	Residential real estate	4,640			1,049			2,019			7,708				226,133			233,841
	Home equity lines of credit	390			65			1,074			1,529				49,524			51,053
	Consumer	926			127			10			1,063				100,183			101,246
	Deposit account overdrafts	55			—			—			55				6,508			6,563
	Total	$	21,234		$	2,139		$	8,541		$	31,914			$	953,258		$	985,172
	During 2013, Peoples identified certain home equity lines of credit that had matured and were not sent notices that the principal was due. The majority of the borrowers continued to make required payments past maturity and had not defaulted. These loans should have been reported as past due since the principal was contractually due during a previous period. The total balance of these loans was $2.2 million at September 30, 2013, $1.2 million and $0.8 million at December 31, 2012 and 2011, respectively. Peoples has mailed letters to these customers, informing them that a notice of principal due will be sent in December 2013. Peoples has adjusted prior period amounts reported to appropriately reflect these loans, and expects the impact of these loans on past due balances to decrease significantly during the fourth quarter of 2013 and first quarter of 2014.
	Also at September 30, 2013, commercial and industrial loans reported as accruing and 90 days past due were substantially higher than previous periods. The cause of this increase was a single loan that was brought current in October 2013.
	Credit Quality Indicators
	As discussed in Note 1 of the Notes to the Consolidated Financial Statements included in Peoples' 2012 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 debt 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 asset 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 debt. 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			Not			Total
(Dollars in thousands)	(Grades 1 - 4)			(Grade 5)			(Grade 6)			(Grade 7)			Rated			Loans
September 30, 2013
Commercial real estate, construction	$	36,096		$	—		$	70		$	—		$	3,803		$	39,969
Commercial real estate, other	343,912			12,625			17,845			—			571			374,953
Commercial real estate	380,008			12,625			17,915			—			4,374			414,922
Commercial and industrial	173,244			6,465			12,302			227			—			192,238
Residential real estate	22,787			1,706			7,743			—			230,366			262,602
Home equity lines of credit	891			—			1,019			—			53,431			55,341
Consumer	52			7			28			—			127,698			127,785
Deposit account overdrafts	—			—			—			—			4,277			4,277
Total	$	576,982		$	20,803		$	39,007		$	227		$	420,146		$	1,057,165
December 31, 2012
Commercial real estate, construction	$	29,738		$	—		$	1,095		$	—		$	3,432		$	34,265
Commercial real estate, other	328,435			18,940			29,573			—			1,125			378,073
Commercial real estate	358,173			18,940			30,668			—			4,557			412,338
Commercial and industrial	150,180			21,566			7,054			—			1,331			180,131
Residential real estate	22,392			1,768			7,597			10			202,074			233,841
Home equity lines of credit	1,051			—			1,094			—			48,908			51,053
Consumer	66			—			47			—			101,133			101,246
Deposit account overdrafts	—			—			—			—			6,563			6,563
Total	$	531,862		$	42,274		$	46,460		$	10		$	364,566		$	985,172
Impaired Loans
The following tables summarize 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
September 30, 2013
Commercial real estate, construction	$	—		$	—		$	—		$	—		$	—		$	—		$	—
Commercial real estate, other	10,857			2,291			2,512			4,803			566			6,441			—
Commercial real estate	10,857			$	2,291		$	2,512		$	4,803		$	566		$	6,441		$	—
Commercial and industrial	265			261			—			261			261			202			—
Residential real estate	3,271			76			2,790			2,866			29			2,968			90
Home equity lines of credit	342			—			342			342			—			331			12
Consumer	184			—			184			184			—			133			11
Total	$	14,919		$	2,628		$	5,828		$	8,456		$	856		$	10,075		$	113
December 31, 2012
Commercial real estate, construction	$	—		$	—		$	—		$	—		$	—		$	—		$	—
Commercial real estate, other	19,023			2,785			7,053			9,838			1,262			11,048			—
Commercial real estate	19,023			$	2,785		$	7,053		$	9,838		$	1,262		$	11,048		$	—
Commercial and industrial	696			182			437			619			36			518			—
Residential real estate	3,943			418			3,063			3,481			123			2,014			149
Home equity lines of credit	349			—			349			349			—			140			17
Consumer	114			—			114			114			—			49			14
Total	$	24,125		$	3,385		$	11,016		$	14,401		$	1,421		$	13,769		$	180
At September 30, 2013, 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 debtor is currently in payment default on any of its debt; (ii) a payment default is probable in the foreseeable future without the modification; (iii) the debtor has declared or is in the process of declaring bankruptcy and (iv) the debtor'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 debtor'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.
During 2013, in accordance with regulatory guidance regarding borrowers who were in Chapter 7 bankruptcy, Peoples identified $543,000 of loans that were TDRs. The regulatory guidance requires loans to be accounted for as collateral-dependent loans when borrowers have filed Chapter 7 bankruptcy, the debt has been discharged and the borrower has not reaffirmed the debt, regardless of the delinquency status of the loan. The filing of bankruptcy by the borrower is evidence of financial difficulty and the discharge of the obligation by the bankruptcy court is deemed to be a concession granted to the borrower. As of September 30, 2013, a total of $494,000 of these loans were accruing since Peoples expects to collect all principal and interest payments.
The following table summarizes the loans that were modified as a TDR during the three and nine months ended September 30, 2013 and 2012.
			Three Months Ended											Nine Months Ended
			Recorded Investment (1)											Recorded Investment (1)
	Number of Contracts		Pre-Modification			Post-Modification			At September 30, 2013			Number of Contracts		Pre-Modification			Post-Modification			At September 30, 2013
Commercial real estate, other	1		$	428		$	428		$	415		1		$	428		$	428		$	415
Commercial and industrial	—		$	—		$	—		$	—		—		$	—		$	—		$	—
Residential real estate	3		$	118		$	118		$	118		13		$	461		$	461		$	360
Home equity lines of credit	—		$	—		$	—		$	—		2		$	53		$	53		$	52
Consumer	6		$	55		$	55		$	55		28		$	219		$	219		$	131
			Three Months Ended											Nine Months Ended
			Recorded Investment (1)											Recorded Investment (1)
	Number of Contracts		Pre-Modification			Post-Modification			At September 30, 2012			Number of Contracts		Pre-Modification			Post-Modification			At September 30, 2012
Commercial real estate, other	3		$	422		$	422		$	413		4		$	752		$	752		$	743
Commercial and industrial	2		$	58		$	58		$	58		2		$	58		$	58		$	58
Residential real estate	71		$	2,788		$	2,788		$	2,788		71		$	2,788		$	2,788		$	2,788
Home equity lines of credit	20		$	244		$	244		$	244		20		$	244		$	244		$	244
Consumer	33		$	143		$	143		$	143		33		$	143		$	143		$	143
-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 nine months ended September 30, 2013 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). There were no such loans during the nine months ended September 30, 2012.
	September 30, 2013
	Number of Contracts		Recorded Investment (1)			Impact on the Allowance for Loan Losses
Commercial real estate, other	1		$	251		$	—
Residential real estate	2		70			—
Home equity lines of credit	1		24			—
Consumer	2		11			—
Total	6		$	356		$	—
-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 September 30, 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, 2013	$	14,215		$	1,733		$	801		$	479		$	438		$	145		$	17,811
Charge-offs	(982		)	(11		)	(440		)	(162		)	(645		)	(380		)	(2,620		)
Recoveries	4,313			28			300			20			361			135			5,157
Net recoveries (charge-offs)	3,331			17			(140		)	(142		)	(284		)	(245		)	2,537
Recovery of loan losses	(4,720		)	445			165			—			410			254			(3,446		)
Balance, September 30, 2013	$	12,826		$	2,195		$	826		$	337		$	564		$	154		$	16,902
Period-end amount allocated to:
Loans individually evaluated for impairment	$	566		$	261		$	29		$	—		$	—		$	—		$	856
Loans collectively evaluated for impairment	12,260			1,934			797			337			564			154			16,046
Ending balance	$	12,826		$	2,195		$	826		$	337		$	564		$	154		$	16,902
Balance, January 1, 2012	$	18,947		$	2,434		$	1,119		$	541		$	449		$	227		$	23,717
Charge-offs	(3,112		)	—			(890		)	(94		)	(428		)	(417		)	(4,941		)
Recoveries	2,538			258			608			23			459			158			4,044
Net (charge-offs) recoveries	(574		)	258			(282		)	(71		)	31			(259		)	(897		)
Recovery of loan losses	(3,400		)	(1,025		)	—			—			—			212			(4,213		)
Balance, September 30, 2012	$	14,973		$	1,667		$	837		$	470		$	480		$	180		$	18,607
Period-end amount allocated to:
Loans individually evaluated for impairment	$	731		$	—		$	36		$	—		$	—		$	—		$	767
Loans collectively evaluated for impairment	14,242			1,667			801			470			480			180			17,840
Ending balance	$	14,973		$	1,667		$	837		$	470		$	480		$	180		$	18,607
During the third quarter of 2013, Peoples extended the historical loss period from two years to three years for its quantitative calculation of the allowance for loan losses. As discussed in Peoples' 2012 Form 10-K, the historical loss period may be updated based on actual charge-offs experienced, and management believes this change more appropriately reflects inherent losses in the portfolio, considering both the economic decline and progress of the recovery, and associated losses and recoveries in the loan portfolio. Peoples also uses qualitative factors in its determination of the allowance for loan losses, which were appropriately adjusted based on internal and external factors that are further discussed Note 1 of Peoples' 2012 Form 10-K. The impact of these changes on the allowance for loan losses was immaterial.

Bank_Owned_Life_Insurance_Note

Bank Owned Life Insurance (Notes)	9 Months Ended
	Sep. 30, 2013
Bank Owned Life Insurance [Abstract]
Life Insurance, Corporate or Bank Owned [Text Block]	Bank Owned Life Insurance
	In May 2013, Peoples initiated a partial surrender of its bank owned life insurance ("BOLI") contracts, resulting in a $5.2 million payout. In July 2013, Peoples requested the surrender of BOLI contracts reported at approximately $42.8 million, with a cost basis of $36.5 million at June 30, 2013. Peoples received notification from the insurance carrier that the surrender request had been processed in July 2013. Peoples received approximately $36.2 million in July 2013 in partial satisfaction of the surrender request, and recorded the remainder as a receivable with the expectation of receiving it within six months of the surrender notification.
	As a result of this transaction, Peoples recorded an additional $2.2 million in income tax expense in the third quarter of 2013.

Stockholders_Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity [Text Block]	Stockholders’ Equity
	The following table details the progression in shares of Peoples’ common and treasury stock during the nine months ended September 30, 2013:
		Common Stock		Treasury
				Stock
	Shares at December 31, 2012	11,155,648		607,688
	Changes related to stock-based compensation awards:
	Release of restricted common shares	26,246		5,207
	Changes related to deferred compensation plan:
	Purchase of treasury stock			2,577
	Reissuance of treasury stock			(9,147	)
	Common shares issued under dividend reinvestment plan	15,147
	Common shares issued under Board of Directors' compensation plan	—		(6,081	)
	Shares at September 30, 2013	11,197,041		600,244
	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 the Board of Directors. At September 30, 2013, 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 nine months ended September 30, 2013:
	(Dollars in thousands)	Unrealized Gain (Loss) on Securities			Unrecognized Net Pension and Postretirement Costs			Accumulated Other Comprehensive Income (Loss)
	Balance, December 31, 2012	$	6,892		$	(6,238	)	$	654
	Reclassification adjustments to net income:
	Realized gain on sale of securities, net of tax	(288		)	—			(288		)
	Realized loss due to settlement and curtailment, net of tax	—			172			172
	Other comprehensive (loss) income, net of reclassifications and tax	(11,145		)	2,062			(9,083		)
	Balance, September 30, 2013	$	(4,541	)	$	(4,004	)	$	(8,545	)

Employee_Benefit_Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2013
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. All retirees are eligible for health benefits; however, Peoples only pays 100% of the cost for those individuals who retired before January 1, 1993. For all others, the retiree is responsible for most, if not all, of the cost of health benefits.  Peoples’ policy is to fund the cost of the benefits as they arise.
	The following tables detail the components of the net periodic cost for the plans:
		Pension Benefits
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
	(Dollars in thousands)	2013			2012				2013			2012
	Interest cost	$	133		$	148			$	399		$	452
	Expected return on plan assets	(164		)	(182		)		(494		)	(574		)
	Amortization of net loss	51			41				154			120
	Settlement of benefit obligation	264			—				264			353
	Net periodic cost	$	284		$	7			$	323		$	351
		Postretirement Benefits
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
	(Dollars in thousands)	2013			2012				2013			2012
	Interest cost	$	1		$	2			$	4		$	7
	Amortization of net loss	(1		)	—				(5		)	(1		)
	Net periodic cost	$	—		$	2			$	(1	)	$	6
	Under US GAAP, Peoples is required to recognize a settlement gain or loss when the aggregate amount of lump-sum distributions to participants equals or exceeds the sum of the service and interest cost components of the net periodic pension cost. The amount of settlement gain or loss recognized is the pro rata amount of the unrealized gain or loss existing immediately prior to the settlement. In general, both the projected benefit obligation and fair value of plan assets are required to be remeasured in order to determine the settlement gain or loss.
	In the third quarter of 2013, the total lump-sum distributions made to participants, when added to the lump-sum distributions made through the first six months of 2013, caused the total settlements through nine months of 2013 to exceed the recognition threshold for settlement gains or losses. As a result, Peoples remeasured its pension obligation and plan assets as of July 1, 2013 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 nine months ended September 30, 2013:
		As of			September 30, 2013
	(Dollars in thousands)	December 31,			Before			Impact of			After
	Funded status:	2012			Settlement			Settlements			Settlements
	Projected benefit obligation	$	17,306		$	15,468		$	(627	)	$	14,841
	Fair value of plan assets	10,019			11,304			(627		)	10,677
	Funded status	$	(7,287	)	$	(4,164	)	$	—		$	(4,164	)
	Gross unrealized loss	$	9,630		$	6,448		$	(264	)	$	6,184
	Assumptions:
	Discount rate	3.3		%	4.2		%				4.2		%
	Expected return on plan assets	7.5		%	7.5		%				7.5		%

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2013
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 common 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 shares that can be issued for incentive stock options is 800,000 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 summarizes the changes to Peoples' stock options for the period ended September 30, 2013:
			Number of Common Shares Subject to Options			Weighted-Average Exercise Price				Weighted-Average Remaining Contractual Life		Aggregate Intrinsic Value
	Outstanding at January 1		101,594			$	26.09
	Expired		42,500			23.46
	Outstanding at September 30		59,094			$	27.98			1.7 years		$	—
	Exercisable at September 30		59,094			$	27.98			1.7 years		$	—
	The following table summarizes Peoples’ stock options outstanding at September 30, 2013:
				Options Outstanding & Exercisable
	Range of Exercise Prices			Common Shares Subject to Options Outstanding		Weighted-Average Remaining Contractual Life	Weighted-Average
							Exercise Price
	$23.59	to	$25.94	2,792		0.9 years	$	25.41
	$26.01	to	$27.74	20,334		1.2 years	27.08
	$28.25	to	$28.26	17,632		2.3 years	28.25
	$28.57	to	$30.00	18,336		1.7 years	29.1
	Total			59,094		1.7 years	$	27.98
	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 vested three years after the grant date and expire ten years from the date of grant. The most recent grant of SARs occurred in 2008. The following summarizes the changes to Peoples' SARs for the period ended September 30, 2013:
			Number of Common Shares Subject to SARs			Weighted-				Weighted-Average Remaining Contractual Life		Aggregate Intrinsic
						Average						Value
						Exercise
						Price
	Outstanding at January 1		22,849			$	25.97
	Forfeited		1,557			25.99
	Outstanding at September 30		21,292			$	25.96			3.9 years		$	—
	Exercisable at September 30		21,292			$	25.96			3.9 years		$	—
	The following table summarizes Peoples’ SARs outstanding at September 30, 2013:
	Exercise Price	Number of Common Shares Subject to SARs Outstanding & Exercisable		Weighted-
				Average Remaining Contractual
				Life
	$23.26	2,000		3.8 years
	$23.77	10,582		4.4 years
	$29.25	8,710		3.4 years
	Total	21,292		3.9 years
	Restricted 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 common shares awarded to non-employee directors expire after six months, while the restrictions on common shares awarded to employees expire after periods ranging from one to three years. In the first quarter of 2013, Peoples granted restricted common shares to non-employee directors with a six month time-based vesting period. Also during the first quarter of 2013, Peoples granted restricted common shares subject to performance-based vesting to officers and key employees with restrictions that will lapse one to three years after the grant date provided that Peoples has net income greater than zero and maintains a well-capitalized status by regulatory standards. In addition, Peoples has granted restricted common shares during 2013 to attract key employees with vesting periods ranging from one to three years.
	The following summarizes the changes to Peoples’ restricted common shares for the period ended September 30, 2013:
		Time-Based Vesting						Performance-Based Vesting
		Number of Shares		Weighted-Average Grant Date Fair Value				Number of Shares		Weighted-Average Grant Date Fair Value
	Outstanding at January 1	78,731		$	16.36			17,865		$	16.07
	Awarded	6,500		21.65				72,706		21.82
	Released	22,262		15.59				3,154		13.14
	Forfeited	1,638		16.16				1,412		19.84
	Outstanding at September 30	61,331		$	17.2			86,005		$	20.98
	For the nine months ended September 30, 2013, the total intrinsic value of restricted common shares released was $539,000.
	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 summarizes the amount of stock-based compensation expense and related tax benefit recognized:
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
	(Dollars in thousands)	2013			2012				2013			2012
	Total stock-based compensation	$	369		$	117			$	1,052		$	602
	Recognized tax benefit	(129		)	(41		)		(368		)	(211		)
	Net expense recognized	$	240		$	76			$	684		$	391
	Total unrecognized stock-based compensation expense related to unvested awards was $1.1 million at September 30, 2013, which will be recognized over a weighted-average period of 1.4 years.

Earnings_Per_Common_Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Share
	The calculations of basic and diluted earnings per share were as follows:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(Dollars in thousands, except per share data)	2013		2012		2013		2012
	Distributed earnings allocated to shareholders	$	1,491	$	1,166	$	4,256	$	3,496
	Undistributed earnings allocated to shareholders	1,000		3,620		8,098		12,900
	Net earnings allocated to shareholders	$	2,491	$	4,786	$	12,354	$	16,396
	Weighted-average shares outstanding	10,589,126		10,530,800		10,574,130		10,522,874
	Effect of potentially dilutive shares	103,429		76		90,869		31
	Total weighted-average diluted shares outstanding	10,692,555		10,530,876		10,664,999		10,522,905
	Earnings per share:
	Basic	$	0.24	$	0.45	$	1.17	$	1.56
	Diluted	$	0.23	$	0.45	$	1.16	$	1.56
	Anti-dilutive common shares excluded from calculation:
	Stock options and SARs	81,340		122,500		95,991		147,756

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]
Acquisitions	Acquisitions
	On January 2, 2013, Peoples Insurance Agency, LLC ("Peoples Insurance") acquired a commercial insurance agency office and related customer accounts in the Pikeville, Kentucky area for total cash consideration of $1.5 million.
	On April 5, 2013, Peoples Insurance acquired an insurance agency office and related customer accounts in the Jackson, Ohio area for total cash consideration of $0.7 million. A portion of the consideration is contingent upon revenue metrics being achieved.
	On May 15, 2013, Peoples Insurance acquired two insurance agency offices and related customer accounts in the Jackson, Ohio area for total cash consideration of $1.1 million. A portion of the consideration is contingent upon revenue metrics being achieved.
	The balances and operations related to these acquisitions are included in Peoples' consolidated financial statements from the date of the acquisition. These acquisitions, individually and collectively, did not materially impact Peoples' financial position, results of operations or cash flows for any period presented.
	On October 14, 2013, Peoples announced that it had completed the acquisition of Ohio Commerce Bank ("Ohio Commerce") as of the close of business on October 11, 2013 for total cash consideration of $16.5 million. Ohio Commerce operates one full-service office in Beachwood, Ohio, and has been merged into Peoples' wholly-owned subsidiary, Peoples Bank, National Association ("Peoples Bank"). The acquisition will be accounted for under the acquisition method of accounting under US GAAP.
	The following is a summary of changes in goodwill and intangible assets during the period ended September 30, 2013:
	(Dollars in thousands)	Goodwill		Gross Core Deposit			Gross Customer Relationships
	Balance, December 31, 2012	$	64,881	$	8,853		$	7,190
	Acquired intangible assets	905		—			2,458
	Balance, September 30, 2013	$	65,786	$	8,853		$	9,648
	(Dollars in thousands)	Gross Intangible Assets		Accumulated Amortization			Net Intangible Assets
	30-Sep-13
	Core deposits	$	8,853	$	(8,343	)	$	510
	Customer relationships	9,648		(6,662		)	2,986
	Total acquired intangible assets	$	18,501	$	(15,005	)	$	3,496
	Mortgage servicing rights						2,135
	Total other intangible assets						$	5,631

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]
New Accounting Pronouncements [Policy Text Block]	New Accounting Pronouncements: In February 2013, the Financial Accounting Standards Board issued an accounting standards update with new guidance on the presentation of accumulated other comprehensive income (“AOCI”). This standard was effective for public companies for interim and annual periods beginning after December 15, 2012. The amendment requires an entity to present the reclassification adjustments out of AOCI and into net income for each component reported. These amounts may be disclosed before-tax or after-tax, and must be disclosed in either the income statement or the notes to the financial statements. This update is intended to supplement changes made in 2012 to increase the prominence of items reported in other comprehensive income. Peoples adopted this new guidance on January 1, 2013, as required. As a result of the adoption, the disclosure of AOCI included in Note 6 contains additional information regarding reclassifications out of AOCI and into net income.

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
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 at September 30, 2013:
				Fair Value Measurements 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)
	September 30, 2013
	Obligations of:
	U.S. Treasury and government agencies	$	22	$	—	$	22		$	—
	U.S. government sponsored agencies	356		—		356			—
	States and political subdivisions	51,061		—		51,061			—
	Residential mortgage-backed securities	519,387		—		519,387			—
	Commercial mortgage-backed securities	33,135		—		33,135			—
	Bank-issued trust preferred securities	7,868		—		7,868			—
	Equity securities	4,207		4,073		134			—
	Total available-for-sale securities	$	616,036	$	4,073	$	611,963		$	—
	December 31, 2012
	Obligations of:
	U.S. Treasury and government agencies	$	26	$	—	$	26		$	—
	U.S. government sponsored agencies	516		—		516			—
	States and political subdivisions	45,668		681		44,987			—
	Residential mortgage-backed securities	514,096		—		514,096			—
	Commercial mortgage-backed securities	64,416		—		64,416			—
	Bank-issued trust preferred securities	10,357		—		10,357			—
	Equity securities	4,106		3,971		135			—
	Total available-for-sale securities	$	639,185	$	4,652	$	634,533		$	—
Fair Value Amounts Disclosured [Table Text Block]	Held-to-maturity securities reported at fair value comprised the following at September 30, 2013:
				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)
	September 30, 2013
	Obligations of:
	States and political subdivisions	$	3,973	$	—	$	3,973		$	—
	Residential mortgage-backed securities	36,898		—		36,898			—
	Commercial mortgage-backed securities	7,758		—		7,758			—
	Total held-to-maturity securities	$	48,629	$	—	$	48,629		$	—
	December 31, 2012
	Obligations of:
	States and political subdivisions	$	4,250	$	—	$	4,250		$	—
	Residential mortgage-backed securities	34,560		—		34,560			—
	Commercial mortgage-backed securities	8,314		—		8,314			—
	Total held-to-maturity securities	$	47,124	$	—	$	47,124		$	—
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:
		September 30, 2013					December 31, 2012
	(Dollars in thousands)	Carrying Amount		Fair Value			Carrying Amount			Fair Value
	Financial assets:
	Cash and cash equivalents	$	50,660	$	50,660		$	62,542		$	62,542
	Investment securities	690,473		689,344			709,085			710,934
	Loans	1,043,442		971,413			973,907			897,132
	Financial liabilities:
	Deposits	$	1,437,866	$	1,444,517		$	1,492,303		$	1,503,098
	Short-term borrowings	106,843		106,843			47,769			47,769
	Long-term borrowings	124,146		131,103			128,823			141,691

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2013
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
	September 30, 2013
	Obligations of:
	U.S. Treasury and government agencies	$	22		$	—		$	—		$	22
	U.S. government sponsored agencies	341			15			—			356
	States and political subdivisions	50,495			1,700			(1,134		)	51,061
	Residential mortgage-backed securities	528,634			6,176			(15,423		)	519,387
	Commercial mortgage-backed securities	33,813			289			(967		)	33,135
	Bank-issued trust preferred securities	8,503			—			(635		)	7,868
	Equity securities	1,216			3,077			(86		)	4,207
	Total available-for-sale securities	$	623,024		$	11,257		$	(18,245	)	$	616,036
	December 31, 2012
	Obligations of:
	U.S. Treasury and government agencies	$	26		$	—		$	—		$	26
	U.S. government sponsored agencies	486			30			—			516
	States and political subdivisions	42,458			3,292			(82		)	45,668
	Residential mortgage-backed securities	511,305			12,558			(9,767		)	514,096
	Commercial mortgage-backed securities	62,129			2,330			(43		)	64,416
	Bank-issued trust preferred securities	10,966			73			(682		)	10,357
	Equity securities	1,214			2,977			(85		)	4,106
	Total available-for-sale securities	$	628,584		$	21,260		$	(10,659	)	$	639,185
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 September 30 were as follows:
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
	(Dollars in thousands)	2013			2012				2013			2012
	Gross gains realized	$	—		$	761			$	3,312		$	4,033
	Gross losses realized	1			649				2,869			758
	Net (loss) gain realized	$	(1	)	$	112			$	443		$	3,275
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
	September 30, 2013
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	—		—			$	—		$	—		—	$	—	$	—
	U.S. government sponsored agencies	—			—			—			—			—			—	—		—
	States and political subdivisions	21,026			1,134			30			—			—			—	21,026		1,134
	Residential mortgage-backed securities	334,362			12,090			77			37,716			3,333			12	372,078		15,423
	Commercial mortgage-backed securities	22,628			750			5			4,933			217			1	27,561		967
	Bank-issued trust preferred securities	3,037			75			2			4,831			560			4	7,868		635
	Equity securities	—			—			—			92			86			2	92		86
	Total	$	381,053		$	14,049		114			$	47,572		$	4,196		19	$	428,625	$	18,245
	December 31, 2012
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	—		—			$	—		$	—		—	$	—	$	—
	U.S. government sponsored agencies	—			—			—			—			—			—	—		—
	States and political subdivisions	4,558			82			8			—			—			—	4,558		82
	Residential mortgage-backed securities	135,250			2,326			28			89,958			7,441			20	225,208		9,767
	Commercial mortgage-backed securities	7,681			43			2			—			—			—	7,681		43
	Bank-issued trust preferred securities	2,376			18			2			5,434			664			5	7,810		682
	Equity securities	—			—			—			91			85			1	91		85
	Total	$	149,865		$	2,469		40			$	95,483		$	8,190		26	$	245,348	$	10,659
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
	September 30, 2013
	Obligations of:
	States and political subdivisions	$	3,853		$	135		$	(15	)	$	3,973
	Residential mortgage-backed securities	38,046			54			(1,202		)	36,898
	Commercial mortgage-backed securities	7,859			10			(111		)	7,758
	Total held-to-maturity securities	$	49,758		$	199		$	(1,328	)	$	48,629
	December 31, 2012
	Obligations of:
	States and political subdivisions	$	3,860		$	390		$	—		$	4,250
	Residential mortgage-backed securities	33,494			1,107			(41		)	34,560
	Commercial mortgage-backed securities	7,921			393			—			8,314
	Total held-to-maturity securities	$	45,275		$	1,890		$	(41	)	$	47,124
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 weighted-average yield of available-for-sale securities by contractual maturity at September 30, 2013.  The 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	$	—		$	19		$	3		$	—		$	22
	U.S. government sponsored agencies	—			341			—			—			341
	States and political subdivisions	470			2,915			17,532			29,578			50,495
	Residential mortgage-backed securities	77			6,007			41,100			481,450			528,634
	Commercial mortgage-backed securities	—			5,285			23,177			5,351			33,813
	Bank-issued trust preferred securities	—			—			—			8,503			8,503
	Equity securities													1,216
	Total available-for-sale securities	$	547		$	14,567		$	81,812		$	524,882		$	623,024
	Fair value
	Obligations of:
	U.S. Treasury and government agencies	$	—		$	19		$	3		$	—		$	22
	U.S. government sponsored agencies	—			356			—			—			356
	States and political subdivisions	472			3,072			18,186			29,331			51,061
	Residential mortgage-backed securities	78			6,262			40,025			473,022			519,387
	Commercial mortgage-backed securities	—			5,574			22,244			5,317			33,135
	Bank-issued trust preferred securities	—			—			—			7,868			7,868
	Equity securities													4,207
	Total available-for-sale securities	$	550		$	15,283		$	80,458		$	515,538		$	616,036
	Total average yield	4.74		%	4.46		%	2.84		%	2.72		%	2.8		%
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
	September 30, 2013
	Obligations of:
	States and political subdivisions	$	867		$	15		2			$	—		$	—		—	$	867	$	15
	Residential mortgage-backed securities	34,860			1,202			8			—			—			—	34,860		1,202
	Commercial mortgage-backed securities	6,656			111			1			—			—			—	6,656		111
	Total	$	42,383		$	1,328		11			$	—		$	—		—	$	42,383	$	1,328
	December 31, 2012
	Residential mortgage-backed securities	$	2,398		$	41		2			$	—		$	—		—	$	2,398	$	41
	Commercial mortgage-backed securities	—			—			—			—			—			—	—		—
	Total	$	2,398		$	41		2			$	—		$	—		—	$	2,398	$	41
Summary of Investment Securities by Contractual Maturity	The table below presents the amortized cost, fair value and weighted-average yield of held-to-maturity securities by contractual maturity at September 30, 2013.  The 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	$	—		$	—		$	336		$	3,517		$	3,853
	Residential mortgage-backed securities	—			—			532			37,514			38,046
	Commercial mortgage-backed securities	—			—			—			7,859			7,859
	Total held-to-maturity securities	$	—		$	—		$	868		$	48,890		$	49,758
	Fair value
	Obligations of:
	States and political subdivisions	$	—		$	—		$	325		$	3,648		$	3,973
	Residential mortgage-backed securities	—			—			512			36,386			36,898
	Commercial mortgage-backed securities	—			—			—			7,758			7,758
	Total held-to-maturity securities	$	—		$	—		$	837		$	47,792		$	48,629
	Total average yield	—		%	—		%	2.57		%	2.79		%	2.78		%

Loans_Tables

Loans (Tables)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]
Schedule of Financing Receivables, Type	The major classifications of loan balances, excluding loans held for sale, were as follows:
	(Dollars in thousands)	September 30,			December 31, 2012
		2013
	Commercial real estate, construction	$	39,969		$	34,265
	Commercial real estate, other	374,953			378,073
	Commercial real estate	414,922			412,338
	Commercial and industrial	192,238			180,131
	Residential real estate	262,602			233,841
	Home equity lines of credit	55,341			51,053
	Consumer	127,785			101,246
	Deposit account overdrafts	4,277			6,563
	Total loans	$	1,057,165		$	985,172
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)	September 30,			December 31,
		2013			2012
	Commercial real estate	$	2,012		$	2,145
	Commercial and industrial	57			74
	Residential real estate	11,458			12,873
	Consumer	48			84
	Total outstanding balance	$	13,575		$	15,176
	Net carrying amount	$	13,091		$	14,700
Nonaccrual and Past Due Loans	The recorded investments in loans on nonaccrual status and accruing loans delinquent for 90 days or more were as follows:
		Nonaccrual Loans							Accruing Loans 90+ Days Past Due
	(Dollars in thousands)	September 30,			December 31,				September 30,			December 31,
		2013			2012				2013			2012
	Commercial real estate, construction	$	76		$	—			$	—		$	—
	Commercial real estate, other	4,786			9,831				—			—
	Commercial real estate	4,862			9,831				—			—
	Commercial and industrial	323			627				950			181
	Residential real estate	3,207			3,136				—			—
	Home equity lines of credit	85			24				1,615			1,050
	Consumer	60			20				32			4
	Total	$	8,537		$	13,638			$	2,597		$	1,235
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 and leases:
		Loans Past Due													Current			Total
	(Dollars in thousands)	30 - 59 days			60 - 89 days			90 + Days			Total				Loans			Loans
	September 30, 2013
	Commercial real estate, construction	$	—		$	—		$	—		$	—			$	39,969		$	39,969
	Commercial real estate, other	2,485			635			1,972			5,092				369,861			374,953
	Commercial real estate	2,485			635			1,972			5,092				409,830			414,922
	Commercial and industrial	4,324			—			1,177			5,501				186,737			192,238
	Residential real estate	2,565			1,317			1,790			5,672				256,930			262,602
	Home equity lines of credit	650			310			1,660			2,620				52,721			55,341
	Consumer	758			112			92			962				126,823			127,785
	Deposit account overdrafts	73			—			—			73				4,204			4,277
	Total	$	10,855		$	2,374		$	6,691		$	19,920			$	1,037,245		$	1,057,165
	December 31, 2012
	Commercial real estate, construction	$	—		$	77		$	—		$	77			$	34,188		$	34,265
	Commercial real estate, other	11,382			705			5,144			17,231				360,842			378,073
	Commercial real estate	11,382			782			5,144			17,308				395,030			412,338
	Commercial and industrial	3,841			116			294			4,251				175,880			180,131
	Residential real estate	4,640			1,049			2,019			7,708				226,133			233,841
	Home equity lines of credit	390			65			1,074			1,529				49,524			51,053
	Consumer	926			127			10			1,063				100,183			101,246
	Deposit account overdrafts	55			—			—			55				6,508			6,563
	Total	$	21,234		$	2,139		$	8,541		$	31,914			$	953,258		$	985,172
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			Not			Total
	(Dollars in thousands)	(Grades 1 - 4)			(Grade 5)			(Grade 6)			(Grade 7)			Rated			Loans
	September 30, 2013
	Commercial real estate, construction	$	36,096		$	—		$	70		$	—		$	3,803		$	39,969
	Commercial real estate, other	343,912			12,625			17,845			—			571			374,953
	Commercial real estate	380,008			12,625			17,915			—			4,374			414,922
	Commercial and industrial	173,244			6,465			12,302			227			—			192,238
	Residential real estate	22,787			1,706			7,743			—			230,366			262,602
	Home equity lines of credit	891			—			1,019			—			53,431			55,341
	Consumer	52			7			28			—			127,698			127,785
	Deposit account overdrafts	—			—			—			—			4,277			4,277
	Total	$	576,982		$	20,803		$	39,007		$	227		$	420,146		$	1,057,165
	December 31, 2012
	Commercial real estate, construction	$	29,738		$	—		$	1,095		$	—		$	3,432		$	34,265
	Commercial real estate, other	328,435			18,940			29,573			—			1,125			378,073
	Commercial real estate	358,173			18,940			30,668			—			4,557			412,338
	Commercial and industrial	150,180			21,566			7,054			—			1,331			180,131
	Residential real estate	22,392			1,768			7,597			10			202,074			233,841
	Home equity lines of credit	1,051			—			1,094			—			48,908			51,053
	Consumer	66			—			47			—			101,133			101,246
	Deposit account overdrafts	—			—			—			—			6,563			6,563
	Total	$	531,862		$	42,274		$	46,460		$	10		$	364,566		$	985,172
Schedule Of Impaired Loans	The following tables summarize 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
	September 30, 2013
	Commercial real estate, construction	$	—		$	—		$	—		$	—		$	—		$	—		$	—
	Commercial real estate, other	10,857			2,291			2,512			4,803			566			6,441			—
	Commercial real estate	10,857			$	2,291		$	2,512		$	4,803		$	566		$	6,441		$	—
	Commercial and industrial	265			261			—			261			261			202			—
	Residential real estate	3,271			76			2,790			2,866			29			2,968			90
	Home equity lines of credit	342			—			342			342			—			331			12
	Consumer	184			—			184			184			—			133			11
	Total	$	14,919		$	2,628		$	5,828		$	8,456		$	856		$	10,075		$	113
	December 31, 2012
	Commercial real estate, construction	$	—		$	—		$	—		$	—		$	—		$	—		$	—
	Commercial real estate, other	19,023			2,785			7,053			9,838			1,262			11,048			—
	Commercial real estate	19,023			$	2,785		$	7,053		$	9,838		$	1,262		$	11,048		$	—
	Commercial and industrial	696			182			437			619			36			518			—
	Residential real estate	3,943			418			3,063			3,481			123			2,014			149
	Home equity lines of credit	349			—			349			349			—			140			17
	Consumer	114			—			114			114			—			49			14
	Total	$	24,125		$	3,385		$	11,016		$	14,401		$	1,421		$	13,769		$	180
Troubled Debt Restructurings on Financing Receivables	The following table summarizes the loans that were modified as a TDR during the three and nine months ended September 30, 2013 and 2012.
				Three Months Ended											Nine Months Ended
				Recorded Investment (1)											Recorded Investment (1)
		Number of Contracts		Pre-Modification			Post-Modification			At September 30, 2013			Number of Contracts		Pre-Modification			Post-Modification			At September 30, 2013
	Commercial real estate, other	1		$	428		$	428		$	415		1		$	428		$	428		$	415
	Commercial and industrial	—		$	—		$	—		$	—		—		$	—		$	—		$	—
	Residential real estate	3		$	118		$	118		$	118		13		$	461		$	461		$	360
	Home equity lines of credit	—		$	—		$	—		$	—		2		$	53		$	53		$	52
	Consumer	6		$	55		$	55		$	55		28		$	219		$	219		$	131
				Three Months Ended											Nine Months Ended
				Recorded Investment (1)											Recorded Investment (1)
		Number of Contracts		Pre-Modification			Post-Modification			At September 30, 2012			Number of Contracts		Pre-Modification			Post-Modification			At September 30, 2012
	Commercial real estate, other	3		$	422		$	422		$	413		4		$	752		$	752		$	743
	Commercial and industrial	2		$	58		$	58		$	58		2		$	58		$	58		$	58
	Residential real estate	71		$	2,788		$	2,788		$	2,788		71		$	2,788		$	2,788		$	2,788
	Home equity lines of credit	20		$	244		$	244		$	244		20		$	244		$	244		$	244
	Consumer	33		$	143		$	143		$	143		33		$	143		$	143		$	143
Summary Of Activity In Allowance For Loan And Lease Losses	Changes in the allowance for loan losses in the periods ended September 30, 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, 2013	$	14,215		$	1,733		$	801		$	479		$	438		$	145		$	17,811
	Charge-offs	(982		)	(11		)	(440		)	(162		)	(645		)	(380		)	(2,620		)
	Recoveries	4,313			28			300			20			361			135			5,157
	Net recoveries (charge-offs)	3,331			17			(140		)	(142		)	(284		)	(245		)	2,537
	Recovery of loan losses	(4,720		)	445			165			—			410			254			(3,446		)
	Balance, September 30, 2013	$	12,826		$	2,195		$	826		$	337		$	564		$	154		$	16,902
	Period-end amount allocated to:
	Loans individually evaluated for impairment	$	566		$	261		$	29		$	—		$	—		$	—		$	856
	Loans collectively evaluated for impairment	12,260			1,934			797			337			564			154			16,046
	Ending balance	$	12,826		$	2,195		$	826		$	337		$	564		$	154		$	16,902
	Balance, January 1, 2012	$	18,947		$	2,434		$	1,119		$	541		$	449		$	227		$	23,717
	Charge-offs	(3,112		)	—			(890		)	(94		)	(428		)	(417		)	(4,941		)
	Recoveries	2,538			258			608			23			459			158			4,044
	Net (charge-offs) recoveries	(574		)	258			(282		)	(71		)	31			(259		)	(897		)
	Recovery of loan losses	(3,400		)	(1,025		)	—			—			—			212			(4,213		)
	Balance, September 30, 2012	$	14,973		$	1,667		$	837		$	470		$	480		$	180		$	18,607
	Period-end amount allocated to:
	Loans individually evaluated for impairment	$	731		$	—		$	36		$	—		$	—		$	—		$	767
	Loans collectively evaluated for impairment	14,242			1,667			801			470			480			180			17,840
	Ending balance	$	14,973		$	1,667		$	837		$	470		$	480		$	180		$	18,607
Troubled Debt Restructurings during prior 12 months that subsequently defaulted [Table Text Block]	The following table presents those loans for the nine months ended September 30, 2013 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). There were no such loans during the nine months ended September 30, 2012.
		September 30, 2013
		Number of Contracts		Recorded Investment (1)			Impact on the Allowance for Loan Losses
	Commercial real estate, other	1		$	251		$	—
	Residential real estate	2		70			—
	Home equity lines of credit	1		24			—
	Consumer	2		11			—
	Total	6		$	356		$	—

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity Attributable to Parent [Abstract]
Schedule of Preferred, Common and Treasury Stock	The following table details the progression in shares of Peoples’ common and treasury stock during the nine months ended September 30, 2013:
		Common Stock		Treasury
				Stock
	Shares at December 31, 2012	11,155,648		607,688
	Changes related to stock-based compensation awards:
	Release of restricted common shares	26,246		5,207
	Changes related to deferred compensation plan:
	Purchase of treasury stock			2,577
	Reissuance of treasury stock			(9,147	)
	Common shares issued under dividend reinvestment plan	15,147
	Common shares issued under Board of Directors' compensation plan	—		(6,081	)
	Shares at September 30, 2013	11,197,041		600,244
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 nine months ended September 30, 2013:
	(Dollars in thousands)	Unrealized Gain (Loss) on Securities			Unrecognized Net Pension and Postretirement Costs			Accumulated Other Comprehensive Income (Loss)
	Balance, December 31, 2012	$	6,892		$	(6,238	)	$	654
	Reclassification adjustments to net income:
	Realized gain on sale of securities, net of tax	(288		)	—			(288		)
	Realized loss due to settlement and curtailment, net of tax	—			172			172
	Other comprehensive (loss) income, net of reclassifications and tax	(11,145		)	2,062			(9,083		)
	Balance, September 30, 2013	$	(4,541	)	$	(4,004	)	$	(8,545	)

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2013
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 nine months ended September 30, 2013:
		As of			September 30, 2013
	(Dollars in thousands)	December 31,			Before			Impact of			After
	Funded status:	2012			Settlement			Settlements			Settlements
	Projected benefit obligation	$	17,306		$	15,468		$	(627	)	$	14,841
	Fair value of plan assets	10,019			11,304			(627		)	10,677
	Funded status	$	(7,287	)	$	(4,164	)	$	—		$	(4,164	)
	Gross unrealized loss	$	9,630		$	6,448		$	(264	)	$	6,184
	Assumptions:
	Discount rate	3.3		%	4.2		%				4.2		%
	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							Nine Months Ended
		September 30,							September 30,
	(Dollars in thousands)	2013			2012				2013			2012
	Interest cost	$	133		$	148			$	399		$	452
	Expected return on plan assets	(164		)	(182		)		(494		)	(574		)
	Amortization of net loss	51			41				154			120
	Settlement of benefit obligation	264			—				264			353
	Net periodic cost	$	284		$	7			$	323		$	351
		Postretirement Benefits
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
	(Dollars in thousands)	2013			2012				2013			2012
	Interest cost	$	1		$	2			$	4		$	7
	Amortization of net loss	(1		)	—				(5		)	(1		)
	Net periodic cost	$	—		$	2			$	(1	)	$	6

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
Share-based Compensation [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	The following summarizes the changes to Peoples' stock options for the period ended September 30, 2013:
			Number of Common Shares Subject to Options			Weighted-Average Exercise Price				Weighted-Average Remaining Contractual Life		Aggregate Intrinsic Value
	Outstanding at January 1		101,594			$	26.09
	Expired		42,500			23.46
	Outstanding at September 30		59,094			$	27.98			1.7 years		$	—
	Exercisable at September 30		59,094			$	27.98			1.7 years		$	—
Schedule of Stock Options Outstanding & Exercisable by Exercise Price Range	The following table summarizes Peoples’ stock options outstanding at September 30, 2013:
				Options Outstanding & Exercisable
	Range of Exercise Prices			Common Shares Subject to Options Outstanding		Weighted-Average Remaining Contractual Life	Weighted-Average
							Exercise Price
	$23.59	to	$25.94	2,792		0.9 years	$	25.41
	$26.01	to	$27.74	20,334		1.2 years	27.08
	$28.25	to	$28.26	17,632		2.3 years	28.25
	$28.57	to	$30.00	18,336		1.7 years	29.1
	Total			59,094		1.7 years	$	27.98
	The following table summarizes Peoples’ SARs outstanding at September 30, 2013:
	Exercise Price	Number of Common Shares Subject to SARs Outstanding & Exercisable		Weighted-
				Average Remaining Contractual
				Life
	$23.26	2,000		3.8 years
	$23.77	10,582		4.4 years
	$29.25	8,710		3.4 years
	Total	21,292		3.9 years
Schedule of Stock Appreciation Rights Outstanding & Exercisable by Exercise Price	The following summarizes the changes to Peoples' SARs for the period ended September 30, 2013:
			Number of Common Shares Subject to SARs			Weighted-				Weighted-Average Remaining Contractual Life		Aggregate Intrinsic
						Average						Value
						Exercise
						Price
	Outstanding at January 1		22,849			$	25.97
	Forfeited		1,557			25.99
	Outstanding at September 30		21,292			$	25.96			3.9 years		$	—
	Exercisable at September 30		21,292			$	25.96			3.9 years		$	—
Schedule of Restricted Shares Activity	The following summarizes the changes to Peoples’ restricted common shares for the period ended September 30, 2013:
		Time-Based Vesting						Performance-Based Vesting
		Number of Shares		Weighted-Average Grant Date Fair Value				Number of Shares		Weighted-Average Grant Date Fair Value
	Outstanding at January 1	78,731		$	16.36			17,865		$	16.07
	Awarded	6,500		21.65				72,706		21.82
	Released	22,262		15.59				3,154		13.14
	Forfeited	1,638		16.16				1,412		19.84
	Outstanding at September 30	61,331		$	17.2			86,005		$	20.98
Summary of Stock-Based Compensation and Related Tax Benefit	The following summarizes the amount of stock-based compensation expense and related tax benefit recognized:
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
	(Dollars in thousands)	2013			2012				2013			2012
	Total stock-based compensation	$	369		$	117			$	1,052		$	602
	Recognized tax benefit	(129		)	(41		)		(368		)	(211		)
	Net expense recognized	$	240		$	76			$	684		$	391

Earnings_Per_Common_Share_Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
Calculations of Basic and Diluted Earnings per Common Share	The calculations of basic and diluted earnings per share were as follows:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(Dollars in thousands, except per share data)	2013		2012		2013		2012
	Distributed earnings allocated to shareholders	$	1,491	$	1,166	$	4,256	$	3,496
	Undistributed earnings allocated to shareholders	1,000		3,620		8,098		12,900
	Net earnings allocated to shareholders	$	2,491	$	4,786	$	12,354	$	16,396
	Weighted-average shares outstanding	10,589,126		10,530,800		10,574,130		10,522,874
	Effect of potentially dilutive shares	103,429		76		90,869		31
	Total weighted-average diluted shares outstanding	10,692,555		10,530,876		10,664,999		10,522,905
	Earnings per share:
	Basic	$	0.24	$	0.45	$	1.17	$	1.56
	Diluted	$	0.23	$	0.45	$	1.16	$	1.56
	Anti-dilutive common shares excluded from calculation:
	Stock options and SARs	81,340		122,500		95,991		147,756

Acquisitions_Tables

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangibles [Abstract]
Schedule of Goodwill [Table Text Block]
	(Dollars in thousands)	Goodwill		Gross Core Deposit			Gross Customer Relationships
	Balance, December 31, 2012	$	64,881	$	8,853		$	7,190
	Acquired intangible assets	905		—			2,458
	Balance, September 30, 2013	$	65,786	$	8,853		$	9,648
Schedule of Finite-Lived Intangible Assets [Table Text Block]
	(Dollars in thousands)	Gross Intangible Assets		Accumulated Amortization			Net Intangible Assets
	30-Sep-13
	Core deposits	$	8,853	$	(8,343	)	$	510
	Customer relationships	9,648		(6,662		)	2,986
	Total acquired intangible assets	$	18,501	$	(15,005	)	$	3,496
	Mortgage servicing rights						2,135
	Total other intangible assets						$	5,631

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Narrative, Assets Measured at Fair Value on a Nonrecurring Basis) (Details) (Nonrecurring Basis, USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Losses on impaired loans charged through allowance for loan losses	$0.10	$0.40
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, aggregate outstanding principal balance	2.6	2.6
Impaired loans, fair value	$2.20	$2.20

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Assets Measured at Fair Value on a Recurring Basis) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$616,036	$639,185
Held to maturity securities, fair value	48,629	47,124
U.S. Treasury and government agencies
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	22	26
U.S. government sponsored agencies
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	356	516
States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	51,061	45,668
Residential mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	519,387	514,096
Commercial mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	33,135	64,416
Bank-issued trust preferred securities
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	7,868	10,357
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	4,207	4,106
Fair Value of Securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	48,629	47,124
Fair Value of Securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	0	0
Fair Value of Securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	48,629	47,124
Fair Value of Securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	0	0
Fair Value of Securities | States and political subdivisions | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	3,973	4,250
Fair Value of Securities | States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	0	0
Fair Value of Securities | States and political subdivisions | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	3,973	4,250
Fair Value of Securities | States and political subdivisions | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	0	0
Fair Value of Securities | Residential mortgage-backed securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	36,898	34,560
Fair Value of Securities | Residential mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	0	0
Fair Value of Securities | Residential mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	36,898	34,560
Fair Value of Securities | Residential mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	0	0
Fair Value of Securities | Commercial mortgage-backed securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	7,758	8,314
Fair Value of Securities | Commercial mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	0	0
Fair Value of Securities | Commercial mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	7,758	8,314
Fair Value of Securities | Commercial mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Held to maturity securities, fair value	0	0
Recurring Basis [Member] | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	616,036	639,185
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	4,073	4,652
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	611,963	634,533
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | U.S. Treasury and government agencies | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	22	26
Recurring Basis [Member] | U.S. Treasury and government agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | U.S. Treasury and government agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	22	26
Recurring Basis [Member] | U.S. Treasury and government agencies | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | U.S. government sponsored agencies | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	356	516
Recurring Basis [Member] | U.S. government sponsored agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | U.S. government sponsored agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	356	516
Recurring Basis [Member] | U.S. government sponsored agencies | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | States and political subdivisions | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	51,061	45,668
Recurring Basis [Member] | States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	681
Recurring Basis [Member] | States and political subdivisions | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	51,061	44,987
Recurring Basis [Member] | States and political subdivisions | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Residential mortgage-backed securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	519,387	514,096
Recurring Basis [Member] | Residential mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Residential mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	519,387	514,096
Recurring Basis [Member] | Residential mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Commercial mortgage-backed securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	33,135	64,416
Recurring Basis [Member] | Commercial mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Commercial mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	33,135	64,416
Recurring Basis [Member] | Commercial mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Bank-issued trust preferred securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	7,868	10,357
Recurring Basis [Member] | Bank-issued trust preferred securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Bank-issued trust preferred securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	7,868	10,357
Recurring Basis [Member] | Bank-issued trust preferred securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Equity Securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	4,207	4,106
Recurring Basis [Member] | Equity Securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	4,073	3,971
Recurring Basis [Member] | Equity Securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	134	135
Recurring Basis [Member] | Equity Securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$0	$0

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments (Fair Values of Financial Assets and Liabilities on Balance Sheets) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Carrying Amount
Financial assets:
Cash and cash equivalents	$50,660	$62,542
Investment securities	690,473	709,085
Loans	1,043,442	973,907
Financial liabilities:
Deposits	1,437,866	1,492,303
Short-term borrowings	106,843	47,769
Long-term borrowings	124,146	128,823
Fair Value
Financial assets:
Cash and cash equivalents	50,660	62,542
Investment securities	689,344	710,934
Loans	971,413	897,132
Financial liabilities:
Deposits	1,444,517	1,503,098
Short-term borrowings	106,843	47,769
Long-term borrowings	$131,103	$141,691

Investment_Securities_Availabl

Investment Securities (Available-for-sale Securities) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$623,024	$628,584
Gross unrealized gains	11,257	21,260
Gross unrealized losses	-18,245	-10,659
Available-for-sale securities, total fair value	616,036	639,185
U.S. Treasury and government agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	22	26
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Available-for-sale securities, total fair value	22	26
U.S. government sponsored agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	341	486
Gross unrealized gains	15	30
Gross unrealized losses	0	0
Available-for-sale securities, total fair value	356	516
States and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	50,495	42,458
Gross unrealized gains	1,700	3,292
Gross unrealized losses	-1,134	-82
Available-for-sale securities, total fair value	51,061	45,668
Residential mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	528,634	511,305
Gross unrealized gains	6,176	12,558
Gross unrealized losses	-15,423	-9,767
Available-for-sale securities, total fair value	519,387	514,096
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	33,813	62,129
Gross unrealized gains	289	2,330
Gross unrealized losses	-967	-43
Available-for-sale securities, total fair value	33,135	64,416
Bank-issued trust preferred securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	8,503	10,966
Gross unrealized gains	0	73
Gross unrealized losses	-635	-682
Available-for-sale securities, total fair value	7,868	10,357
Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	1,216	1,214
Gross unrealized gains	3,077	2,977
Gross unrealized losses	-86	-85
Available-for-sale securities, total fair value	$4,207	$4,106

Investment_Securities_Availabl1

Investment Securities (Available-for-sale Securities Gross Realized Gains and Losses) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Gross gains and gross losses realized from sales of available-for-sale securities:
Gross gains realized	$0	$761	$3,312	$4,033
Gross losses realized	1	649	2,869	758
Net gain realized	($1)	$112	$443	$3,275

Investment_Securities_Availabl2

Investment Securities (Available-for-sale Securities with Unrealized Loss) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
	securities	securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, unrealized loss	$14,049,000	$2,469,000
Less than 12 months, no. of securities	114	40
12 months or more, fair value	47,572,000	95,483,000
12 months or more, unrealized loss	4,196,000	8,190,000
12 months or more, no. of securities	19	26
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	428,625,000	245,348,000
Total unrealized loss	18,245,000	10,659,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	381,053,000	149,865,000
U.S. Treasury and government agencies
Available-for-sale securities that had an unrealized loss:
Less than 12 months, unrealized loss	0	0
Less than 12 months, no. of securities	0	0
12 months or more, fair value	0	0
12 months or more, unrealized loss	0	0
12 months or more, no. of securities	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	0	0
Total unrealized loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	0
U.S. government sponsored agencies
Available-for-sale securities that had an unrealized loss:
Less than 12 months, unrealized loss	0	0
Less than 12 months, no. of securities	0	0
12 months or more, fair value	0	0
12 months or more, unrealized loss	0	0
12 months or more, no. of securities	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	0	0
Total unrealized loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	0
States and political subdivisions
Available-for-sale securities that had an unrealized loss:
Less than 12 months, unrealized loss	1,134,000	82,000
Less than 12 months, no. of securities	30	8
12 months or more, fair value	0	0
12 months or more, unrealized loss	0	0
12 months or more, no. of securities	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	21,026,000	4,558,000
Total unrealized loss	1,134,000	82,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	21,026,000	4,558,000
Residential mortgage-backed securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, unrealized loss	12,090,000	2,326,000
Less than 12 months, no. of securities	77	28
12 months or more, fair value	37,716,000	89,958,000
12 months or more, unrealized loss	3,333,000	7,441,000
12 months or more, no. of securities	12	20
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	372,078,000	225,208,000
Total unrealized loss	15,423,000	9,767,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	334,362,000	135,250,000
Commercial mortgage-backed securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, unrealized loss	750,000	43,000
Less than 12 months, no. of securities	5	2
12 months or more, fair value	4,933,000	0
12 months or more, unrealized loss	217,000	0
12 months or more, no. of securities	1	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	27,561,000	7,681,000
Total unrealized loss	967,000	43,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	22,628,000	7,681,000
Bank-issued trust preferred securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, unrealized loss	75,000	18,000
Less than 12 months, no. of securities	2	2
12 months or more, fair value	4,831,000	5,434,000
12 months or more, unrealized loss	560,000	664,000
12 months or more, no. of securities	4	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	7,868,000	7,810,000
Total unrealized loss	635,000	682,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	3,037,000	2,376,000
Number of available-for-sale securities in unrealized loss position for twelve months or more	4
Available-for-sale securities in unrealized loss position, aggregate book value	5,400,000
Equity Securities
Available-for-sale securities that had an unrealized loss:
Less than 12 months, unrealized loss	0	0
Less than 12 months, no. of securities	0	0
12 months or more, fair value	92,000	91,000
12 months or more, unrealized loss	86,000	85,000
12 months or more, no. of securities	2	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	92,000	91,000
Total unrealized loss	86,000	85,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale securities that had an unrealized loss:
Percentage of mortgage-backed securities in unrealized loss position for more than 12 months	93.00%
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Available-for-sale securities that had an unrealized loss:
Less than 12 months, no. of securities	5
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, More than 12 Months, Number of Positions with Fair Value Less than 90% of Book Value	2
Percentage of mortgage-backed securities in unrealized loss position for more than 12 months	7.00%
Fair value within book value	90.00%
Fair Value Less Than 90 Percent of Book Value [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Available-for-sale securities that had an unrealized loss:
12 months or more, fair value	800,000
Mortgage-backed securities in unrealized loss position for more than 12 months, aggregate book value	$900,000

Investment_Securities_Availabl3

Investment Securities (Available-for-sale Securities by Maturities) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Investments [Abstract]
Federal income tax rate	35.00%
Schedule of Available-for-sale Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	$547
Debt securities, maturing 1 to 5 years, amortized cost	14,567
Debt securities, maturing 5 to 10 years, amortized cost	81,812
Available-for-sale securities, maturing over 10 years, amortized cost	524,882
Available-for-sale securities, total amortized cost	623,024	628,584
Debt securities, maturing within 1 year, fair value	550
Debt securities, maturing 1 to 5 years, fair value	15,283
Debt securities, maturing 5 to 10 years, fair value	80,458
Available-for-sale securities, maturing over 10 years, fair value	515,538
Available-for-sale securities, total fair value	616,036	639,185
Available-for-sale securities, maturing within 1 year, average yield	4.74%
Available-for-sale securities, maturing 1 to 5 years, average yield	4.46%
Available-for-sale securities, maturing 5 to 10 years, average yield	2.84%
Available-for-sale securities, maturing over 10 years, average yield	2.72%
Available-for-sale securities, total average yield	2.80%
U.S. Treasury and government agencies
Schedule of Available-for-sale Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	19
Debt securities, maturing 5 to 10 years, amortized cost	3
Debt securities, maturing over 10 years, amortized cost	0
Debt securities, total amortized cost	22
Available-for-sale securities, total amortized cost	22	26
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	19
Debt securities, maturing 5 to 10 years, fair value	3
Debt securities, maturing over 10 years, fair value	0
Debt securities, total fair value	22
Available-for-sale securities, total fair value	22	26
U.S. government sponsored agencies
Schedule of Available-for-sale Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	341
Debt securities, maturing 5 to 10 years, amortized cost	0
Debt securities, maturing over 10 years, amortized cost	0
Debt securities, total amortized cost	341
Available-for-sale securities, total amortized cost	341	486
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	356
Debt securities, maturing 5 to 10 years, fair value	0
Debt securities, maturing over 10 years, fair value	0
Debt securities, total fair value	356
Available-for-sale securities, total fair value	356	516
States and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	470
Debt securities, maturing 1 to 5 years, amortized cost	2,915
Debt securities, maturing 5 to 10 years, amortized cost	17,532
Debt securities, maturing over 10 years, amortized cost	29,578
Debt securities, total amortized cost	50,495
Available-for-sale securities, total amortized cost	50,495	42,458
Debt securities, maturing within 1 year, fair value	472
Debt securities, maturing 1 to 5 years, fair value	3,072
Debt securities, maturing 5 to 10 years, fair value	18,186
Debt securities, maturing over 10 years, fair value	29,331
Debt securities, total fair value	51,061
Available-for-sale securities, total fair value	51,061	45,668
Residential mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	77
Debt securities, maturing 1 to 5 years, amortized cost	6,007
Debt securities, maturing 5 to 10 years, amortized cost	41,100
Debt securities, maturing over 10 years, amortized cost	481,450
Debt securities, total amortized cost	528,634
Available-for-sale securities, total amortized cost	528,634	511,305
Debt securities, maturing within 1 year, fair value	78
Debt securities, maturing 1 to 5 years, fair value	6,262
Debt securities, maturing 5 to 10 years, fair value	40,025
Debt securities, maturing over 10 years, fair value	473,022
Debt securities, total fair value	519,387
Available-for-sale securities, total fair value	519,387	514,096
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	5,285
Debt securities, maturing 5 to 10 years, amortized cost	23,177
Debt securities, maturing over 10 years, amortized cost	5,351
Debt securities, total amortized cost	33,813
Available-for-sale securities, total amortized cost	33,813	62,129
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	5,574
Debt securities, maturing 5 to 10 years, fair value	22,244
Debt securities, maturing over 10 years, fair value	5,317
Debt securities, total fair value	33,135
Available-for-sale securities, total fair value	33,135	64,416
Bank-issued trust preferred securities
Schedule of Available-for-sale Securities [Line Items]
Other securities, maturing over 10 years, amortized cost	8,503
Other securities, total amortized cost	8,503
Available-for-sale securities, total amortized cost	8,503	10,966
Other securities, maturing over 10 years, fair value	7,868
Other securities, total fair value	7,868
Available-for-sale securities, total fair value	7,868	10,357
Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Other securities, total amortized cost	1,216
Available-for-sale securities, total amortized cost	1,216	1,214
Other securities, total fair value	4,207
Available-for-sale securities, total fair value	$4,207	$4,106

Investment_Securities_Heldtoma

Investment Securities (Held-to-maturity Securities) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	$49,758,000	$45,275,000
Gross unrealized gains	199,000	1,890,000
Gross unrealized losses	-1,328,000	-41,000
Held-to-maturity securities, total fair value	48,629,000	47,124,000
Gross realized gains or losses	0	0
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	3,853,000	3,860,000
Gross unrealized gains	135,000	390,000
Gross unrealized losses	-15,000	0
Held-to-maturity securities, total fair value	3,973,000	4,250,000
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	38,046,000	33,494,000
Gross unrealized gains	54,000	1,107,000
Gross unrealized losses	-1,202,000	-41,000
Held-to-maturity securities, total fair value	36,898,000	34,560,000
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	7,859,000	7,921,000
Gross unrealized gains	10,000	393,000
Gross unrealized losses	-111,000	0
Held-to-maturity securities, total fair value	$7,758,000	$8,314,000

Investment_Securities_Heldtoma1

Investment Securities (Held-to-maturity Securities with Unrealized Loss) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	securities	securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$42,383	$2,398
Less than 12 months, unrealized loss	1,328	41
Less than 12 months, no. of securities	11	2
12 months or more, fair value	0	0
12 months or more, unrealized loss	0	0
12 months or more, no. of securities	0	0
Total fair value	42,383	2,398
Total unrealized loss	1,328	41
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	867
Less than 12 months, unrealized loss	15
Less than 12 months, no. of securities	2
12 months or more, fair value	0
12 months or more, unrealized loss	0
12 months or more, no. of securities	0
Total fair value	867
Total unrealized loss	15	0
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	34,860	2,398
Less than 12 months, unrealized loss	1,202	41
Less than 12 months, no. of securities	8	2
12 months or more, fair value	0	0
12 months or more, unrealized loss	0	0
12 months or more, no. of securities	0	0
Total fair value	34,860	2,398
Total unrealized loss	1,202	41
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	6,656	0
Less than 12 months, unrealized loss	111	0
Less than 12 months, no. of securities	1	0
12 months or more, fair value	0	0
12 months or more, unrealized loss	0	0
12 months or more, no. of securities	0	0
Total fair value	6,656	0
Total unrealized loss	$111	$0

Investment_Securities_Heldtoma2

Investment Securities (Held-to-maturity Securities by Maturities) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Investments [Abstract]
Federal income tax rate	35.00%
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	868
Debt securities, maturing over 10 years, amortized cost	48,890
Debt securities, total amortized cost	49,758	45,275
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	837
Debt securities, maturing over 10 years, fair value	47,792
Held-to-maturity securities, total fair value	48,629	47,124
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	2.57%
Held-to-maturity securities, maturing over 10 years, average yield	2.79%
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	336
Debt securities, maturing over 10 years, amortized cost	3,517
Debt securities, total amortized cost	3,853	3,860
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	325
Debt securities, maturing over 10 years, fair value	3,648
Held-to-maturity securities, total fair value	3,973	4,250
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	532
Debt securities, maturing over 10 years, amortized cost	37,514
Debt securities, total amortized cost	38,046	33,494
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	512
Debt securities, maturing over 10 years, fair value	36,386
Held-to-maturity securities, total fair value	36,898	34,560
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	7,859
Debt securities, total amortized cost	7,859	7,921
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	7,758
Held-to-maturity securities, total fair value	$7,758	$8,314

Investment_Securities_Pledged_

Investment Securities (Pledged Securities) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Schedule of Securities [Line Items]
Pledged Financial Instruments, Not Separately Reported, Held-To-Maturity Securities for Federal Home Loan Bank and Federal Reserve Bank	$26.30
Carrying value of available-for-sale securities pledged to secure public and trust department deposits and repurchase agreements	314.5	260.9
Carrying value of held-to-maturity securities pledged to secure public and trust department deposits and repurchase agreements	21.4	45.3
Carrying value of available-for-sale securities pledged to secure additional borrowing capacity at Federal Home Loan Bank and Federal Reserve Bank	$17.40	$50.40

Loans_Narrative_Details

Loans (Narrative) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Recorded Investment	$543,000
Financing Receivable Modifications Recorded Investment Current	494,000
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	233,800,000	202,000,000
Commerical Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pledged assets separately reported, loans pledged as collateral, at fair value	$148,900,000	$123,800,000

Loans_Loan_Balances_By_Classif

Loans (Loan Balances By Classification) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	$1,057,165	$985,172
Loans and Leases Receivable, Net Amount	1,040,263	967,361
Commercial Real Estate, Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	39,969	34,265
Commercial Real Estate, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	374,953	378,073
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	414,922	412,338
Loans and Leases Receivable, Net Amount	414,922	412,338
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	192,238	180,131
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	262,602	233,841
Home Equity Lines of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	55,341	51,053
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	127,785	101,246
Deposit Account Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	$4,277	$6,563

Loans_Loans_Acquired_With_Dete

Loans (Loans Acquired With Deterioration of Credit Quality) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	$13,575	$15,176
Financing receivable, acquired with deteriorated credit quality, net of deferred income	13,091	14,700
Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	2,012	2,145
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	57	74
Residential Real Estate
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	11,458	12,873
Consumer
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, acquired with deteriorated credit quality	$48	$84

Loans_Nonaccrual_and_Past_Due_

Loans (Nonaccrual and Past Due Loans) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	$8,537,000	$13,638,000
Accruing Loans 90 or More Days Past Due	2,597,000	1,235,000
Commercial Real Estate, Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	76,000	0
Accruing Loans 90 or More Days Past Due	0	0
Commercial Real Estate, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	4,786,000	9,831,000
Accruing Loans 90 or More Days Past Due	0	0
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	4,862,000	9,831,000
Accruing Loans 90 or More Days Past Due	0	0
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	323,000	627,000
Accruing Loans 90 or More Days Past Due	950,000	181,000
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	3,207,000	3,136,000
Accruing Loans 90 or More Days Past Due	0	0
Home Equity Lines of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Receivables Reclassified as Past Due Since Maturity	2,200,000	1,200,000	800,000
Nonaccrual Loans	85,000	24,000
Accruing Loans 90 or More Days Past Due	1,615,000	1,050,000
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	60,000	20,000
Accruing Loans 90 or More Days Past Due	$32,000	$4,000

Loans_Aging_Of_The_Recorded_In

Loans (Aging Of The Recorded Investment In Past Due Loans And Leases) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	$10,855	$21,234
60 - 89 days	2,374	2,139
90 or more days	6,691	8,541
Total	19,920	31,914
Current Loans	1,037,245	953,258
Loans and Leases Receivable, Net Amount	1,040,263	967,361
Total Loans	1,057,165	985,172
Commercial Real Estate, Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	0	0
60 - 89 days	0	77
90 or more days	0	0
Total	0	77
Current Loans	39,969	34,188
Loans and Leases Receivable, Net Amount	39,969	34,265
Commercial Real Estate, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	2,485	11,382
60 - 89 days	635	705
90 or more days	1,972	5,144
Total	5,092	17,231
Current Loans	369,861	360,842
Loans and Leases Receivable, Net Amount	374,953	378,073
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	2,485	11,382
60 - 89 days	635	782
90 or more days	1,972	5,144
Total	5,092	17,308
Current Loans	409,830	395,030
Loans and Leases Receivable, Net Amount	414,922	412,338
Total Loans	414,922	412,338
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	4,324	3,841
60 - 89 days	0	116
90 or more days	1,177	294
Total	5,501	4,251
Current Loans	186,737	175,880
Loans and Leases Receivable, Net Amount	192,238	180,131
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	2,565	4,640
60 - 89 days	1,317	1,049
90 or more days	1,790	2,019
Total	5,672	7,708
Current Loans	256,930	226,133
Loans and Leases Receivable, Net Amount	262,602	233,841
Home Equity Lines of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	650	390
60 - 89 days	310	65
90 or more days	1,660	1,074
Total	2,620	1,529
Current Loans	52,721	49,524
Loans and Leases Receivable, Net Amount	55,341	51,053
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	758	926
60 - 89 days	112	127
90 or more days	92	10
Total	962	1,063
Current Loans	126,823	100,183
Loans and Leases Receivable, Net Amount	127,785	101,246
Deposit Account Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
30 - 59 days	73	55
60 - 89 days	0	0
90 or more days	0	0
Total	73	55
Current Loans	4,204	6,508
Loans and Leases Receivable, Net Amount	$4,277	$6,563

Loans_Loans_By_Risk_Category_D

Loans (Loans By Risk Category) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	$1,040,263	$967,361
Commercial Real Estate, Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	39,969	34,265
Commercial Real Estate, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	374,953	378,073
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	414,922	412,338
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	192,238	180,131
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	262,602	233,841
Home Equity Lines of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	55,341	51,053
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	127,785	101,246
Deposit Account Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	4,277	6,563
Not Rated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	420,146	364,566
Not Rated [Member] | Commercial Real Estate, Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	3,803	3,432
Not Rated [Member] | Commercial Real Estate, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	571	1,125
Not Rated [Member] | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	4,374	4,557
Not Rated [Member] | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	1,331
Not Rated [Member] | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	230,366	202,074
Not Rated [Member] | Home Equity Lines of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	53,431	48,908
Not Rated [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	127,698	101,133
Not Rated [Member] | Deposit Account Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	4,277	6,563
Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	227	10
Doubtful [Member] | Commercial Real Estate, Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Doubtful [Member] | Commercial Real Estate, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Doubtful [Member] | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Doubtful [Member] | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	227	0
Doubtful [Member] | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	10
Doubtful [Member] | Home Equity Lines of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Doubtful [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Doubtful [Member] | Deposit Account Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	39,007	46,460
Substandard [Member] | Commercial Real Estate, Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	70	1,095
Substandard [Member] | Commercial Real Estate, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	17,845	29,573
Substandard [Member] | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	17,915	30,668
Substandard [Member] | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	12,302	7,054
Substandard [Member] | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	7,743	7,597
Substandard [Member] | Home Equity Lines of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	1,019	1,094
Substandard [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	28	47
Substandard [Member] | Deposit Account Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	20,803	42,274
Special Mention [Member] | Commercial Real Estate, Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Special Mention [Member] | Commercial Real Estate, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	12,625	18,940
Special Mention [Member] | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	12,625	18,940
Special Mention [Member] | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	6,465	21,566
Special Mention [Member] | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	1,706	1,768
Special Mention [Member] | Home Equity Lines of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Special Mention [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	7	0
Special Mention [Member] | Deposit Account Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	576,982	531,862
Pass [Member] | Commercial Real Estate, Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	36,096	29,738
Pass [Member] | Commercial Real Estate, Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	343,912	328,435
Pass [Member] | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	380,008	358,173
Pass [Member] | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	173,244	150,180
Pass [Member] | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	22,787	22,392
Pass [Member] | Home Equity Lines of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	891	1,051
Pass [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	52	66
Pass [Member] | Deposit Account Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	0	0
Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net Amount	$1,057,165	$985,172

Loans_Schedule_Of_Impaired_Loa

Loans (Schedule Of Impaired Loans) (Details) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$14,919	$24,125
Recorded Investment With Allowance	2,628	3,385
Recorded Investment Without Allowance	5,828	11,016
Total Recorded Investment	8,456	14,401
Related Allowance	856	1,421
Average Recorded Investment	10,075	13,769
Interest Income Recognized	113	180
Commercial Real Estate, Construction
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0	0
Recorded Investment With Allowance	0	0
Recorded Investment Without Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Commercial Real Estate, Other
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	10,857	19,023
Recorded Investment With Allowance	2,291	2,785
Recorded Investment Without Allowance	2,512	7,053
Total Recorded Investment	4,803	9,838
Related Allowance	566	1,262
Average Recorded Investment	6,441	11,048
Interest Income Recognized	0	0
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	10,857	19,023
Recorded Investment With Allowance	2,291	2,785
Recorded Investment Without Allowance	2,512	7,053
Total Recorded Investment	4,803	9,838
Related Allowance	566	1,262
Average Recorded Investment	6,441	11,048
Interest Income Recognized	0	0
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	265	696
Recorded Investment With Allowance	261	182
Recorded Investment Without Allowance	0	437
Total Recorded Investment	261	619
Related Allowance	261	36
Average Recorded Investment	202	518
Interest Income Recognized	0	0
Residential Real Estate
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	3,271	3,943
Recorded Investment With Allowance	76	418
Recorded Investment Without Allowance	2,790	3,063
Total Recorded Investment	2,866	3,481
Related Allowance	29	123
Average Recorded Investment	2,968	2,014
Interest Income Recognized	90	149
Home Equity Lines of Credit
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	342	349
Recorded Investment With Allowance	0	0
Recorded Investment Without Allowance	342	349
Total Recorded Investment	342	349
Related Allowance	0	0
Average Recorded Investment	331	140
Interest Income Recognized	12	17
Consumer
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	184	114
Recorded Investment With Allowance	0	0
Recorded Investment Without Allowance	184	114
Total Recorded Investment	184	114
Related Allowance	0	0
Average Recorded Investment	133	49
Interest Income Recognized	$11	$14

Loans_Troubled_Debt_Restructur

Loans (Troubled Debt Restructurings) (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
	contract		contract		contract		contract
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Impaired, Commitment to Lend	$0				$0
Financing Receivable Modifications Recorded Investment Current	494,000				494,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts					6
Financing Receivable, Modifications, Subsequent Default, Recorded Investment					356,000	[1]
Financing Receivable, Modifications, Subsequent Default, Determination of Allowance for Credit Losses					0
Commercial Real Estate, Other
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period			3		1		4
Recorded Investment, Pre-Modification			422,000	[1]	428,000	[1]	752,000	[1]
Recorded Investment, Post-Modification			422,000	[1]	428,000	[1]	752,000	[1]
Total Recorded Investment			413,000	[1]	415,000	[1]	743,000	[1]
Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts					1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment					251,000	[1]
Financing Receivable, Modifications, Subsequent Default, Determination of Allowance for Credit Losses					0
Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period			2		0		2
Recorded Investment, Pre-Modification			58,000	[1]	0	[1]	58,000	[1]
Recorded Investment, Post-Modification			58,000	[1]	0	[1]	58,000	[1]
Total Recorded Investment			58,000	[1]	0	[1]	58,000	[1]
Residential Real Estate
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period	3		71		13		71
Recorded Investment, Pre-Modification	118,000	[1]	2,788,000	[1]	461,000	[1]	2,788,000	[1]
Recorded Investment, Post-Modification	118,000	[1]	2,788,000	[1]	461,000	[1]	2,788,000	[1]
Total Recorded Investment	118,000	[1]	2,788,000	[1]	360,000	[1]	2,788,000	[1]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts					2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment					70,000	[1]
Financing Receivable, Modifications, Subsequent Default, Determination of Allowance for Credit Losses					0
Home Equity Lines of Credit
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period	0		20		2		20
Recorded Investment, Pre-Modification	0	[1]	244,000	[1]	53,000	[1]	244,000	[1]
Recorded Investment, Post-Modification	0	[1]	244,000	[1]	53,000	[1]	244,000	[1]
Total Recorded Investment	0	[1]	244,000	[1]	52,000	[1]	244,000	[1]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts					1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment					24,000	[1]
Financing Receivable, Modifications, Subsequent Default, Determination of Allowance for Credit Losses					0
Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Number Of Contracts During Period	6		33		28		33
Recorded Investment, Pre-Modification	55,000	[1]	143,000	[1]	219,000	[1]	143,000	[1]
Recorded Investment, Post-Modification	55,000	[1]	143,000	[1]	219,000	[1]	143,000	[1]
Total Recorded Investment	55,000	[1]	143,000	[1]	131,000	[1]	143,000	[1]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts					2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment					$11,000	[1]
Financing Receivable, Modifications, Subsequent Default, Determination of Allowance for Credit Losses					0
[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.

Loans_Summary_Of_Activity_In_A

Loans (Summary Of Activity In Allowance For Loan And Lease Losses) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			$17,811	$23,717
Charge-offs			-2,620	-4,941
Recoveries			5,157	4,044
Net (charge-offs) recoveries			2,537	-897
Provision for loan losses	-919	-956	-3,446	-4,213
Ending balance	16,902	18,607	16,902	18,607
Period-end amount allocated to:
Loans individually evaluated for impairment	856	767	856	767
Loans collectively evaluated for impairment	16,046	17,840	16,046	17,840
Ending balance	16,902	18,607	16,902	18,607
Commercial Real Estate, Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			14,215	18,947
Charge-offs			-982	-3,112
Recoveries			4,313	2,538
Net (charge-offs) recoveries			3,331	-574
Provision for loan losses			-4,720	-3,400
Ending balance	12,826	14,973	12,826	14,973
Period-end amount allocated to:
Loans individually evaluated for impairment	566	731	566	731
Loans collectively evaluated for impairment	12,260	14,242	12,260	14,242
Ending balance	12,826	14,973	12,826	14,973
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			1,733	2,434
Charge-offs			-11	0
Recoveries			28	258
Net (charge-offs) recoveries			17	258
Provision for loan losses			445	-1,025
Ending balance	2,195	1,667	2,195	1,667
Period-end amount allocated to:
Loans individually evaluated for impairment	261	0	261	0
Loans collectively evaluated for impairment	1,934	1,667	1,934	1,667
Ending balance	2,195	1,667	2,195	1,667
Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			801	1,119
Charge-offs			-440	-890
Recoveries			300	608
Net (charge-offs) recoveries			-140	-282
Provision for loan losses			165	0
Ending balance	826	837	826	837
Period-end amount allocated to:
Loans individually evaluated for impairment	29	36	29	36
Loans collectively evaluated for impairment	797	801	797	801
Ending balance	826	837	826	837
Home Equity Lines of Credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			479	541
Charge-offs			-162	-94
Recoveries			20	23
Net (charge-offs) recoveries			-142	-71
Provision for loan losses			0	0
Ending balance	337	470	337	470
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	337	470	337	470
Ending balance	337	470	337	470
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			438	449
Charge-offs			-645	-428
Recoveries			361	459
Net (charge-offs) recoveries			-284	31
Provision for loan losses			410	0
Ending balance	564	480	564	480
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	564	480	564	480
Ending balance	564	480	564	480
Deposit Account Overdrafts
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			145	227
Charge-offs			-380	-417
Recoveries			135	158
Net (charge-offs) recoveries			-245	-259
Provision for loan losses			254	212
Ending balance	154	180	154	180
Period-end amount allocated to:
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	154	180	154	180
Ending balance	$154	$180	$154	$180

Bank_Owned_Life_Insurance_Deta

Bank Owned Life Insurance (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013
Bank Owned Life Insurance [Abstract]
Proceeds from Life Insurance Policies	$36.20	$5.20
Reported value of bank owned life insurance to be surrendered		42.8
Cost basis of bank owned life insurance to be surrendered		36.5
Income tax expense	$2.20

Stockholders_Equity_Narrative_

Stockholders' Equity (Narrative) (Details)	Sep. 30, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Preferred stock, shares issued	0	0
Preferred stock, shares authorized	50,000	50,000

Stockholders_Equity_Stock_Roll

Stockholders' Equity (Stock Rollforward) (Details)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013
			Common Stock	Treasury Stock
Increase (Decrease) in Stock by Class [Roll Forward]
Common stock, shares issued, beginning of period	11,197,041	11,155,648	11,155,648
Treasury stock, shares, beginning of period	600,244	607,688		607,688
Changes related to stock-based compensation awards:
Release of restricted common shares, common stock			26,246
Release of restricted common shares, treasury stock				5,207
Changes related to deferred compensation plan:
Purchase of treasury stock				2,577
Re-issuance of treasury stock				-9,147
Common shares issued under dividend reinvestment plan			15,147
Common shares issued under Board of Directors' compensation plan			0	-6,081
Common stock, shares issued, end of period	11,197,041	11,155,648	11,197,041
Treasury stock, shares, end of period	600,244	607,688		600,244

Stockholders_Equity_Accumulate

Stockholders' Equity (Accumulated Other Comprehensive (Loss) Income) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Unrealized (Loss) Gain on Securities, beginning balance	$6,892
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	-288
Unrealized (Loss) Gain on Securities, current period change, net of tax	-11,145
Unrealized (Loss) Gain on Securities, ending balance	-4,541
Unrecognized Net Pension and Postretirement Costs, beginning balance	-6,238
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Net of Tax	172
Unrecognized Net Pension and Postretirement Costs, current period change, net of tax	2,062
Unrecognized Net Pension and Postretirement Costs, ending balance	-4,004
Accumulated Comprehensive (Loss) Income, beginning balance	654
Other Comprehensive Income (Loss), Reclassification Adjustment in Net Income, Net of Tax	-288
Other Comprehensive Income (Loss), Settlement and Curtailment Costs of Pension and Other Postretirement Benefit Plan Valuation, Net of Tax	172
Accumulated Comprehensive (Loss) Income, current period change, net of tax	-9,083
Accumulated Comprehensive (Loss) Income, ending balance	($8,545)

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Defined Benefit Postretirement Health Coverage [Member] | Employees Retired before January 1, 1993 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Defined Benefit Plan, Maximum Coverage per Retiree			100.00%
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Defined Benefit Plan, Benefit Obligation	$14,841		$14,841		$17,306
Defined Benefit Plan, Benefit Obligation, Before Settlements	15,468		15,468
Defined Benefit Plan, Settlements, Benefit Obligation			-627
Defined Benefit Plan, Fair Value of Plan Assets	10,677		10,677		10,019
Defined Benefit Plan, Fair Value of Plan Assets, Before Settlements	11,304		11,304
Defined Benefit Plan, Settlements, Plan Assets			-627
Defined Benefit Plan, Funded Status of Plan	-4,164		-4,164		-7,287
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	6,184		6,184		9,630
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax, before Settlements	6,448		6,448
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.20%		4.20%		3.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets			7.50%		7.50%
Components of net periodic benefit costs:
Interest cost	133	148	399	452
Expected return on plan assets	-164	-182	-494	-574
Defined Benefit Plan, Amortization of Net Gains (Losses)	51	41	154	120
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	-264	0	-264	-353
Net periodic benefit cost	284	7	323	351
Other Postretirement Benefit Plans, Defined Benefit [Member]
Components of net periodic benefit costs:
Interest cost	1	2	4	7
Defined Benefit Plan, Amortization of Net Gains (Losses)	-1	0	-5	-1
Net periodic benefit cost	$0	$2	($1)	$6
Other Postretirement Benefit Plans, Defined Benefit [Member] | Employees Hired before January 1, 2003 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Defined Benefit Plan, Contribution Per Employee, Coverage Basis, Consecutive Period of Highest Average Monthly Compensation			5 years
Defined Benefit Plan, Contribution Per Employee, Coverage Basis, Lastest Service Period			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]
Defined Benefit Plan, Annual Contribution Per Employee, Percent			2.00%

StockBased_Compensation_Narrat

Stock-Based Compensation (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013
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	$1,100,000
Unrecognized stock-based compensation expense related to unvested awards, weighted-average period of recognition	1 year 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	$539,000
Restricted Shares | Employees | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period	1 year
Restricted Shares | Employees | Maximum [Member]
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 $)	9 Months Ended
	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Begining Balance	101,594
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period	42,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance	59,094
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options Outstanding, Weighted Average Exercise Price	$26.09
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$23.46
Options Outstanding, Weighted Average Exercise Price	$27.98
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	1 year 8 months 1 day
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	59,094
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$27.98
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	1 year 8 months 1 day
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$0
Options Outstanding & Exercisable, Common Shares Subject to Options Outstanding	59,094
Options Outstanding & Exercisable, Weighted-Average Remaining Contractual Life	1 year 8 months 1 day
Options Outstanding & Exercisable, Weighted-Average Exercise Price (usd per share)	$27.98
Range of Exercise Price $23.59 - $25.94
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options Outstanding & Exercisable, Range of Exercise Prices, Lower Range Limit	$23.59
Options Outstanding & Exercisable, Range of Exercise Prices, Upper Range Limit	$25.94
Options Outstanding & Exercisable, Common Shares Subject to Options Outstanding	2,792
Options Outstanding & Exercisable, Weighted-Average Remaining Contractual Life	0 years 11 months 1 day
Options Outstanding & Exercisable, Weighted-Average Exercise Price (usd per share)	$25.41
Range of Exercise Price $26.01 - $27.74
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options Outstanding & Exercisable, Range of Exercise Prices, Lower Range Limit	$26.01
Options Outstanding & Exercisable, Range of Exercise Prices, Upper Range Limit	$27.74
Options Outstanding & Exercisable, Common Shares Subject to Options Outstanding	20,334
Options Outstanding & Exercisable, Weighted-Average Remaining Contractual Life	1 year 2 months 1 day
Options Outstanding & Exercisable, Weighted-Average Exercise Price (usd per share)	$27.08
Range of Exercise Price $28.25 - $28.26
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options Outstanding & Exercisable, Range of Exercise Prices, Lower Range Limit	$28.25
Options Outstanding & Exercisable, Range of Exercise Prices, Upper Range Limit	$28.26
Options Outstanding & Exercisable, Common Shares Subject to Options Outstanding	17,632
Options Outstanding & Exercisable, Weighted-Average Remaining Contractual Life	2 years 3 months 1 day
Options Outstanding & Exercisable, Weighted-Average Exercise Price (usd per share)	$28.25
Range of Exercise Price $28.57 - $30.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options Outstanding & Exercisable, Range of Exercise Prices, Lower Range Limit	$28.57
Options Outstanding & Exercisable, Range of Exercise Prices, Upper Range Limit	$30
Options Outstanding & Exercisable, Common Shares Subject to Options Outstanding	18,336
Options Outstanding & Exercisable, Weighted-Average Remaining Contractual Life	1 year 8 months
Options Outstanding & Exercisable, Weighted-Average Exercise Price (usd per share)	$29.10

StockBased_Compensation_Stock_

Stock-Based Compensation (Stock Appreciation Rights) (Details) (SARs, USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	21,292	22,849
Number of Shares Subject to SARs Outstanding & Exercisable	21,292
Weighted-Average Remaining Contractual Life	3 years 11 months 1 day
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$25.96	$25.97
Forfeited (in shares)	1,557
Forfeited (in dollars per share)	$25.99
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	3 years 11 months 1 day
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Intrinsic Value	$0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercisable, Number	21,292
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercisable, Weighted Average Exercise Price	$25.96
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercisable, Weighted Average Remaining Contractual Terms	3 years 11 months 1 day
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercisable, Intrinsic Value	$0
Exercise Price $23.26
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price (usd per share)	$23.26
Number of Shares Subject to SARs Outstanding & Exercisable	2,000
Weighted-Average Remaining Contractual Life	3 years 9 months 1 day
Exercise Price $23.77
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price (usd per share)	$23.77
Number of Shares Subject to SARs Outstanding & Exercisable	10,582
Weighted-Average Remaining Contractual Life	4 years 5 months 1 day
Exercise Price $29.25
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price (usd per share)	$29.25
Number of Shares Subject to SARs Outstanding & Exercisable	8,710
Weighted-Average Remaining Contractual Life	3 years 5 months 1 day

StockBased_Compensation_Restri

Stock-Based Compensation (Restricted Shares) (Details) (Restricted Shares, USD $)	9 Months Ended
	Sep. 30, 2013
Time Vesting
Number of Shares
Outstanding at January 1 (in shares)	78,731
Awarded	6,500
Released	22,262
Forfeited (in shares)	1,638
Outstanding at End of Period (in shares)	61,331
Weighted - Average Grant Date Fair Value
Outstanding at January 1 (in dollars per share)	$16.36
Awarded (usd per share)	$21.65
Released (usd per share)	$15.59
Forfeited (in dollars per share)	$16.16
Outstanding at End of Period (in dollars per share)	$17.20
Performance Vesting
Number of Shares
Outstanding at January 1 (in shares)	17,865
Awarded	72,706
Released	3,154
Forfeited (in shares)	1,412
Outstanding at End of Period (in shares)	86,005
Weighted - Average Grant Date Fair Value
Outstanding at January 1 (in dollars per share)	$16.07
Awarded (usd per share)	$21.82
Released (usd per share)	$13.14
Forfeited (in dollars per share)	$19.84
Outstanding at End of Period (in dollars per share)	$20.98

StockBased_Compensation_StockB

Stock-Based Compensation (Stock-Based Compensation and Related Tax Benefit) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation [Abstract]
Total stock-based compensation	$369	$117	$1,052	$602
Recognized tax benefit	-129	-41	-368	-211
Net expense recognized	$240	$76	$684	$391

Earnings_Per_Common_Share_Calc

Earnings Per Common Share (Calculations of Basic and Diluted Earnings per Common Share) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Distributed earnings allocated to shareholders	$1,491	$1,166	$4,256	$3,496
Undistributed earnings allocated to shareholders	1,000	3,620	8,098	12,900
Net earnings allocated to shareholders	$2,491	$4,786	$12,354	$16,396
Weighted-average shares outstanding	10,589,126	10,530,800	10,574,130	10,522,874
Effect of potentially dilutive shares	103,429	76	90,869	31
Total weighted-average diluted shares outstanding	10,692,555	10,530,876	10,664,999	10,522,905
Earnings per common share - basic	$0.24	$0.45	$1.17	$1.56
Earnings per common share - diluted	$0.23	$0.45	$1.16	$1.56
Anti-dilutive shares excluded from computation of EPS	81,340	122,500	95,991	147,756

Acquisitions_Narrative_Details

Acquisitions (Narrative) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Jan. 02, 2013	Apr. 05, 2013	15-May-13	Oct. 11, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
			Commercial Insurance Agency Office in Pikeville, Kentucky [Member]	Insurance Agency Office in Jackson, Ohio [Member]	Two Insurance Agency Offices in Jackson, Ohio [Member]	Ohio Commerce Bank [Member]	Gross Core Deposit [Member]	Gross Core Deposit [Member]	Gross Customer Relationship [Member]	Gross Customer Relationship [Member]	Goodwill [Member]	Goodwill [Member]	Customer Relationships [Member]	Other Intangible Assets [Member]	Servicing Contracts [Member]	Core Deposits [Member]
Business Acquisition [Line Items]
Goodwill	$65,786,000	$64,881,000									$65,786,000	$64,881,000
Business Acquisition, Cost of Acquired Entity, Purchase Price, Total			1,500,000	700,000	1,100,000	16,500,000
Finite-Lived Intangible Assets, Gross							8,853,000	8,853,000	9,648,000	7,190,000			9,648,000	18,501,000		8,853,000
Goodwill, Acquired During Period											905,000
Finite-lived Intangible Assets Acquired							0		2,458,000
Finite-Lived Intangible Assets, Accumulated Amortization													-6,662,000	-15,005,000		-8,343,000
Other intangible assets	$5,631,000	$3,644,000											$2,986,000	$3,496,000	$2,135,000	$510,000