Derivative Instruments and Hedging Activities (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Maturity date of Floating Rate Junior Subordinated Deferrable Interest Debentures	Dec. 31, 2036
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivatives in cash flow hedging relationships [Abstract]
Amount of gain (loss) recognized in OCI on derivatives, net of tax (effective portion)	$ (181,000)	$ (311,000)
Location of gain or (loss) recognized in income on derivative (ineffective portion)	Not applicable	Not applicable
Amount of gain (loss) recognized in income on derivative (ineffective portion)	0	0
Interest Rate Swap [Member] | Fair Value Hedging [Member]
Derivatives in fair value hedging relationships [Abstract]
Description of income statement classification	Interest income	Interest income
Gain or (Loss) on swaps	(51,000)	0
Interest Rate Swap [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative, maturity date	Sep. 15, 2020	Sep. 15, 2020
Derivatives, Fair Value [Line Items]
Notional/ contract amount	4,000,000	4,000,000
Estimated net fair value	(547,000)	(452,000)
Fair value balance sheet location	Other Liabilities	Other Liabilities
Expiration date	Sep. 15, 2020	Sep. 15, 2020
Interest Rate Swap Two [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative, maturity date	Aug. 15, 2021	Aug. 15, 2021
Derivatives, Fair Value [Line Items]
Notional/ contract amount	2,204,000	2,245,000
Estimated net fair value	(148,000)	91,000
Fair value balance sheet location	Other Liabilities	Other Liabilities
Expiration date	Aug. 15, 2021	Aug. 15, 2021
Interest Rate Swap Three [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative, maturity date	Aug. 15, 2021	Aug. 15, 2021
Derivatives, Fair Value [Line Items]
Notional/ contract amount	2,078,000	2,117,000
Estimated net fair value	(141,000)	88,000
Fair value balance sheet location	Other Liabilities	Other Liabilities
Expiration date	Aug. 15, 2021	Aug. 15, 2021
Interest Rate Swap Four [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative, maturity date	Sep. 26, 2022
Derivatives, Fair Value [Line Items]
Notional/ contract amount	1,050,000
Estimated net fair value	(5,000)
Fair value balance sheet location	Other Liabilities
Expiration date	Sep. 26, 2022
Interest Rate Swap [Member]
Derivative [Line Items]
Maturity date of Floating Rate Junior Subordinated Deferrable Interest Debentures	Dec. 31, 2036
Derivative, maturity date	Dec. 31, 2020
Derivative, description of variable rate basis	three month LIBOR
Derivative, basis spread on variable rate (in hundredths)	1.70%
Derivative, type of interest rate paid on swap	fixed rate
Derivative, fixed interest rate (in hundredths)	4.91%
Interest expense on interest rate swap	112,000	117,000
Derivatives, Fair Value [Line Items]
Expiration date	Dec. 31, 2020
Interest Rate Swaps II [Member]
Derivative [Line Items]
Derivative, description of variable rate basis	one-month LIBOR
Number of derivative instruments entered into	3
Number of commercial loans related to interest rate swaps	3
Net interest income on interest rate swap	$ 95,000	$ 31,000
Interest Rate Swaps II [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, maturity date	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Expiration date	Dec. 31, 2021
Interest Rate Swaps II [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, maturity date	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Expiration date	Dec. 31, 2022