Fair Value Measurement (Details) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Mar. 31, 2011 Equity securities [Member]	Mar. 31, 2011 Collateralized Debt Obligations [Member]	Jun. 30, 2012 Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Jun. 30, 2012 Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2011 Significant Other Observable Inputs (Level 2) [Member]	Jun. 30, 2012 Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member]	Jun. 30, 2012 Carrying Value [Member]	Dec. 31, 2011 Carrying Value [Member]	Jun. 30, 2012 Estimated Fair Value [Member]	Dec. 31, 2011 Estimated Fair Value [Member]	Jun. 30, 2012 Estimated Fair Value, Level 1 [Member]	Dec. 31, 2011 Estimated Fair Value, Level 1 [Member]	Jun. 30, 2012 Estimated Fair Value, Level 2 [Member]	Dec. 31, 2011 Estimated Fair Value, Level 2 [Member]	Jun. 30, 2012 Estimated Fair Value, Level 3 [Member]	Dec. 31, 2011 Estimated Fair Value, Level 3 [Member]
Financial assets [Abstract]
Cash and cash equivalents														$ 38,931,000	$ 37,833,000	$ 38,931,000	$ 37,833,000	$ 38,931,000	$ 37,833,000	$ 0	$ 0	$ 0	$ 0
Interest bearing deposits in financial institutions - maturities of 90 days or greater														1,736,000		1,736,000		1,736,000		0		0
Securities available for sale	83,700,000		83,700,000		87,140,000			4,307,000	4,261,000	78,576,000	81,934,000	817,000	945,000	83,700,000	87,140,000	83,700,000	87,140,000	4,307,000	4,261,000	78,576,000	81,934,000	817,000	945,000
Loans and leases, net														278,384,000	303,729,000	287,498,000	313,338,000	0	0	0	0	287,498,000	313,338,000
Federal Home Loan Bank stock														1,286,000	1,801,000	1,286,000	1,801,000	0	0	0	0	1,286,000	1,801,000
Accrued interest receivable														1,318,000	1,401,000	1,318,000	1,401,000	1,318,000	1,401,000	0	0	0	0
Financial liabilities [Abstract]
Deposits														(374,758,000)	(397,631,000)	(374,711,000)	(397,885,000)	(256,665,000)	(245,314,000)	(118,046,000)	(152,571,000)	0	0
Securities sold under repurchase agreements														(15,951,000)	(19,455,000)	(15,910,000)	(19,417,000)	0	0	(15,910,000)	(19,417,000)	0	0
Subordinated debentures														(10,310,000)	(10,310,000)	(4,550,000)	(4,375,000)	0	0	0	0	(4,550,000)	(4,375,000)
Advances from borrowers for taxes and insurance														(1,210,000)	(1,222,000)	(1,210,000)	(1,222,000)	(1,210,000)	(1,222,000)	0	0	0	0
Accrued interest payable														(1,109,000)	(1,127,000)	(1,109,000)	(1,127,000)	(1,109,000)	(1,127,000)	0	0	0	0
Securities Available for Sale [Abstract]
States and political subdivisions	3,006,000		3,006,000		3,117,000			0	0	2,189,000	2,172,000	817,000	945,000
Mortgage-backed securities	76,387,000		76,387,000		79,762,000			0	0	76,387,000	79,762,000	0	0
Equity securities	4,307,000		4,307,000		4,261,000			4,307,000	4,261,000	0	0	0	0
Securities available for sale	83,700,000		83,700,000		87,140,000			4,307,000	4,261,000	78,576,000	81,934,000	817,000	945,000	83,700,000	87,140,000	83,700,000	87,140,000	4,307,000	4,261,000	78,576,000	81,934,000	817,000	945,000
Change in Level 3 securities measured at fair value on a recurring basis [Abstract]
Beginning balance			945,000	20,000
Total realized and unrealized gains (losses) included in income			0	(163,000)
Total unrealized gains (losses) included in other comprehensive income			0	143,000
Net purchases, sales, calls and maturities			(128,000)	0
Net transfer into Level 3			0	0
Ending balance	817,000	0	817,000	0
Other than temporary impairment losses						29,000	134,000
Impaired assets fair value [Abstract]
Impaired loans	26,485,000		26,485,000		40,744,000			0	0	0	0	26,485,000	40,744,000
Impaired other real estate owned	15,088,000		15,088,000		18,300,000			0	0	0	0	15,088,000	18,300,000
Adjustments to certain properties carried as other real estate owned	$ 723,000	$ 655,000	$ 2,695,000	$ 1,328,000