Regulatory Matters (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Regulatory Matters [Abstract]
Required Reserve Balances with Federal Reserve Bank	$ 6,100,000		$ 5,800,000	$ 6,100,000
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments			1,000,000
Regulatory Capital Requirements for Banks [Line Items]
Repurchase of preferred shares and common stock warrant	18,000,000	21,000,000	1,201,000	39,000,000	0
Parent Company [Member]
Regulatory Capital Requirements for Banks [Line Items]
Capital	180,053,000		176,224,000	180,053,000
Capital to Risk Weighted Assets	16.20%		15.40%	16.20%
Capital Required for Capital Adequacy	88,915,000		91,355,000	88,915,000
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%		8.00%	8.00%
Capital Required to be Well Capitalized	111,144,000		114,194,000	111,144,000
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%		10.00%	10.00%
Tier One Risk Based Capital	165,121,000		160,604,000	165,121,000
Tier One Risk Based Capital to Risk Weighted Assets	14.90%		14.10%	14.90%
Tier One Risk Based Capital Required for Capital Adequacy	44,458,000		45,678,000	44,458,000
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.00%		4.00%	4.00%
Tier One Risk Based Capital Required to be Well Capitalized	66,687,000		68,516,000	66,687,000
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.00%		6.00%	6.00%
Tier One Leverage Capital	165,121,000		160,604,000	165,121,000
Tier One Leverage Capital to Average Assets	9.50%		8.80%	9.50%
Tier One Leverage Capital Required for Capital Adequacy	69,913,000		72,775,000	69,913,000
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%		4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	87,392,000		90,969,000	87,392,000
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%		5.00%	5.00%
Risk Weighted Assets	1,111,443,000		1,141,938,000	1,111,443,000
Subsidiaries [Member]
Regulatory Capital Requirements for Banks [Line Items]
Capital	166,622,000		189,601,000	166,622,000
Capital to Risk Weighted Assets	15.10%		16.70%	15.10%
Capital Required for Capital Adequacy	88,546,000		91,044,000	88,546,000
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%		8.00%	8.00%
Capital Required to be Well Capitalized	110,682,000		113,805,000	110,682,000
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%		10.00%	10.00%
Tier One Risk Based Capital	152,665,000		175,331,000	152,665,000
Tier One Risk Based Capital to Risk Weighted Assets	13.80%		15.40%	13.80%
Tier One Risk Based Capital Required for Capital Adequacy	44,273,000		45,522,000	44,273,000
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.00%		4.00%	4.00%
Tier One Risk Based Capital Required to be Well Capitalized	66,409,000		68,283,000	66,409,000
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.00%		6.00%	6.00%
Tier One Leverage Capital	152,665,000		175,331,000	152,665,000
Tier One Leverage Capital to Average Assets	8.80%		9.70%	8.80%
Tier One Leverage Capital Required for Capital Adequacy	69,277,000		72,384,000	69,277,000
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%		4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	86,596,000		90,480,000	86,596,000
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%		5.00%	5.00%
Risk Weighted Assets	$ 1,106,824,000		$ 1,138,054,000	$ 1,106,824,000