Fair Value Measurement (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financial assets [Abstract]
Cash and cash equivalents	$ 51,625,000				$ 37,833,000				$ 51,625,000	$ 37,833,000
Interest bearing deposits in financial institutions - maturities of 90 days or more	5,408,000								5,408,000
Securities available for sale	79,150,000				87,140,000				79,150,000	87,140,000
Loans and leases, net	253,070,000				313,338,000				253,070,000	313,338,000
Federal Home Loan Bank stock	931,000				1,801,000				931,000	1,801,000
Accrued interest receivable	1,119,000				1,401,000				1,119,000	1,401,000
Financial liabilities [Abstract]
Deposits	(358,529,000)				(397,885,000)				(358,529,000)	(397,885,000)
Securities sold under repurchase agreements	(19,208,000)				(19,417,000)				(19,208,000)	(19,417,000)
Subordinated debentures	(4,723,000)				(4,375,000)				(4,723,000)	(4,375,000)
Advances from borrowers for taxes and insurance	(1,335,000)				(1,222,000)				(1,335,000)	(1,222,000)
Accrued interest payable	(1,205,000)				(1,127,000)				(1,205,000)	(1,127,000)
Securities Available for Sale [Abstract]
States and political subdivisions	2,592,000				3,117,000				2,592,000	3,117,000
Mortgage-backed securities	72,266,000				79,762,000				72,266,000	79,762,000
Equity securities	4,292,000				4,261,000				4,292,000	4,261,000
Securities available for sale	79,150,000				87,140,000				79,150,000	87,140,000
Impaired assets fair value [Abstract]
Impaired loans	39,410,000				40,744,000				39,410,000	40,744,000
Impaired other real estate owned	11,509,000				18,300,000				11,509,000	18,300,000
Adjustments to certain properties carried as other real estate owned	1,000,000	1,200,000	723,000	2,000,000	1,900,000	797,000	655,000	673,000	4,867,000	4,018,000	3,791,000
Commercial [Member]
Impaired assets fair value [Abstract]
Impaired loans	12,000								12,000
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Real Estate Construction [Member]
Impaired assets fair value [Abstract]
Impaired loans	6,764,000								6,764,000
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Real Estate Construction 1 to 4 family [Member]
Impaired assets fair value [Abstract]
Impaired loans	2,359,000								2,359,000
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Real Estate Mortgage 5 Plus Family [Member]
Impaired assets fair value [Abstract]
Impaired loans	734,000								734,000
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Real Estate Mortgage Commercial [Member]
Impaired assets fair value [Abstract]
Impaired loans	29,043,000								29,043,000
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Home equity [Member]
Impaired assets fair value [Abstract]
Impaired loans	498,000								498,000
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Real estate - vacant land [Member]
Impaired assets fair value [Abstract]
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Impaired other real estate owned	3,373,000								3,373,000
Real estate - 1-4 family [Member]
Impaired assets fair value [Abstract]
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Impaired other real estate owned	1,456,000								1,456,000
Real estate - 5 plus family [Member]
Impaired assets fair value [Abstract]
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Impaired other real estate owned	987,000								987,000
Real estate - commercial [Member]
Impaired assets fair value [Abstract]
Valuation Techniques									Sales comparison approach
Unobservable Inputs									Discount on market value and selling costs
Impaired other real estate owned	5,693,000								5,693,000
Minimum [Member] | Commercial [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									10.00%
Minimum [Member] | Real Estate Construction [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Minimum [Member] | Real Estate Construction 1 to 4 family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Minimum [Member] | Real Estate Mortgage 5 Plus Family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Minimum [Member] | Real Estate Mortgage Commercial [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									6.00%
Minimum [Member] | Home equity [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Minimum [Member] | Real estate - vacant land [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									6.00%
Minimum [Member] | Real estate - 1-4 family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									3.00%
Minimum [Member] | Real estate - 5 plus family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									6.00%
Minimum [Member] | Real estate - commercial [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									3.00%
Maximum [Member] | Commercial [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									10.00%
Maximum [Member] | Real Estate Construction [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Maximum [Member] | Real Estate Construction 1 to 4 family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Maximum [Member] | Real Estate Mortgage 5 Plus Family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Maximum [Member] | Real Estate Mortgage Commercial [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Maximum [Member] | Home equity [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Maximum [Member] | Real estate - vacant land [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									36.00%
Maximum [Member] | Real estate - 1-4 family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									6.00%
Maximum [Member] | Real estate - 5 plus family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									6.00%
Maximum [Member] | Real estate - commercial [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									6.00%
Weighted Average [Member] | Commercial [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									10.00%
Weighted Average [Member] | Real Estate Construction [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Weighted Average [Member] | Real Estate Construction 1 to 4 family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Weighted Average [Member] | Real Estate Mortgage 5 Plus Family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Weighted Average [Member] | Real Estate Mortgage Commercial [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Weighted Average [Member] | Home equity [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									8.00%
Weighted Average [Member] | Real estate - vacant land [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									16.00%
Weighted Average [Member] | Real estate - 1-4 family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									5.00%
Weighted Average [Member] | Real estate - 5 plus family [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									6.00%
Weighted Average [Member] | Real estate - commercial [Member]
Impaired assets fair value [Abstract]
Range (Weighted Average)									6.00%
Collateralized Debt Obligations [Member]
Change in Level 3 securities measured at fair value on a recurring basis [Abstract]
Allocations for impaired loans									11,729,000	6,303,000	9,776,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets [Abstract]
Securities available for sale	4,292,000				4,261,000				4,292,000	4,261,000
Securities Available for Sale [Abstract]
States and political subdivisions	0				0				0	0
Mortgage-backed securities	0				0				0	0
Equity securities	4,292,000				4,261,000				4,292,000	4,261,000
Securities available for sale	4,292,000				4,261,000				4,292,000	4,261,000
Impaired assets fair value [Abstract]
Impaired loans	0				0				0	0
Impaired other real estate owned	0				0				0	0
Significant Other Observable Inputs (Level 2) [Member]
Financial assets [Abstract]
Securities available for sale	74,041,000				81,934,000				74,041,000	81,934,000
Securities Available for Sale [Abstract]
States and political subdivisions	1,775,000				2,172,000				1,775,000	2,172,000
Mortgage-backed securities	72,266,000				79,762,000				72,266,000	79,762,000
Equity securities	0				0				0	0
Securities available for sale	74,041,000				81,934,000				74,041,000	81,934,000
Impaired assets fair value [Abstract]
Impaired loans	0				0				0	0
Impaired other real estate owned	0				0				0	0
Significant Unobservable Inputs (Level 3) [Member]
Financial assets [Abstract]
Securities available for sale	817,000				945,000				817,000	945,000
Securities Available for Sale [Abstract]
States and political subdivisions	817,000				945,000				817,000	945,000
Mortgage-backed securities	0				0				0	0
Equity securities	0				0				0	0
Securities available for sale	817,000				945,000				817,000	945,000
Change in Level 3 securities measured at fair value on a recurring basis [Abstract]
Balance at beginning of year				945,000				20,000	945,000	20,000	37,000
Total realized and unrealized losses included in income									0	(163,000)	(659,000)
Total realized income included in other comprehensive income									0	143,000	642,000
Net purchases, sales, calls and maturities									(128,000)	0	0
Net transfer into Level 3									0	945,000	0
Balance at end of year	817,000				945,000				817,000	945,000	20,000
Impaired assets fair value [Abstract]
Impaired loans	39,410,000				40,744,000				39,410,000	40,744,000
Impaired other real estate owned	11,509,000				18,300,000				11,509,000	18,300,000
Carrying Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	51,625,000				37,833,000				51,625,000	37,833,000
Interest bearing deposits in financial institutions - maturities of 90 days or more	5,408,000								5,408,000
Securities available for sale	79,150,000				87,140,000				79,150,000	87,140,000
Loans and leases, net	252,070,000				303,729,000				252,070,000	303,729,000
Federal Home Loan Bank stock	931,000				1,801,000				931,000	1,801,000
Accrued interest receivable	1,119,000				1,401,000				1,119,000	1,401,000
Financial liabilities [Abstract]
Deposits	(358,594,000)				(397,631,000)				(358,594,000)	(397,631,000)
Securities sold under repurchase agreements	(19,262,000)				(19,455,000)				(19,262,000)	(19,455,000)
Subordinated debentures	(10,310,000)				(10,310,000)				(10,310,000)	(10,310,000)
Advances from borrowers for taxes and insurance	(1,335,000)				(1,222,000)				(1,335,000)	(1,222,000)
Accrued interest payable	(1,205,000)				(1,127,000)				(1,205,000)	(1,127,000)
Securities Available for Sale [Abstract]
Securities available for sale	79,150,000				87,140,000				79,150,000	87,140,000
Estimated Fair Value, Level 1 [Member]
Financial assets [Abstract]
Cash and cash equivalents	51,625,000				37,833,000				51,625,000	37,833,000
Interest bearing deposits in financial institutions - maturities of 90 days or more	5,408,000								5,408,000
Securities available for sale	4,292,000				4,261,000				4,292,000	4,261,000
Loans and leases, net	0				0				0	0
Federal Home Loan Bank stock	0				0				0	0
Accrued interest receivable	1,119,000				1,401,000				1,119,000	1,401,000
Financial liabilities [Abstract]
Deposits	(251,899,000)				(245,314,000)				(251,899,000)	(245,314,000)
Securities sold under repurchase agreements	0				0				0	0
Subordinated debentures	0				0				0	0
Advances from borrowers for taxes and insurance	(1,335,000)				(1,222,000)				(1,335,000)	(1,222,000)
Accrued interest payable	(1,205,000)				(1,127,000)				(1,205,000)	(1,127,000)
Securities Available for Sale [Abstract]
Securities available for sale	4,292,000				4,261,000				4,292,000	4,261,000
Estimated Fair Value, Level 2 [Member]
Financial assets [Abstract]
Cash and cash equivalents	0				0				0	0
Interest bearing deposits in financial institutions - maturities of 90 days or more	0								0
Securities available for sale	74,041,000				81,934,000				74,041,000	81,934,000
Loans and leases, net	0				0				0	0
Federal Home Loan Bank stock	0				0				0	0
Accrued interest receivable	0				0				0	0
Financial liabilities [Abstract]
Deposits	(106,630,000)				(152,571,000)				(106,630,000)	(152,571,000)
Securities sold under repurchase agreements	(19,208,000)				(19,417,000)				(19,208,000)	(19,417,000)
Subordinated debentures	0				0				0	0
Advances from borrowers for taxes and insurance	0				0				0	0
Accrued interest payable	0				0				0	0
Securities Available for Sale [Abstract]
Securities available for sale	74,041,000				81,934,000				74,041,000	81,934,000
Estimated Fair Value, Level 3 [Member]
Financial assets [Abstract]
Cash and cash equivalents	0				0				0	0
Interest bearing deposits in financial institutions - maturities of 90 days or more	0								0
Securities available for sale	817,000				945,000				817,000	945,000
Loans and leases, net	253,070,000				313,338,000				253,070,000	313,338,000
Federal Home Loan Bank stock	931,000				1,801,000				931,000	1,801,000
Accrued interest receivable	0				0				0	0
Financial liabilities [Abstract]
Deposits	0				0				0	0
Securities sold under repurchase agreements	0				0				0	0
Subordinated debentures	(4,723,000)				(4,375,000)				(4,723,000)	(4,375,000)
Advances from borrowers for taxes and insurance	0				0				0	0
Accrued interest payable	0				0				0	0
Securities Available for Sale [Abstract]
Securities available for sale	$ 817,000				$ 945,000				$ 817,000	$ 945,000