Loans and Allowance for Loan Losses (Details 5) (Interest Only at Market Rate of Interest [Member], USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of TDR by class and modification type
No. of Loans		$ 27		$ 105
Recorded investment at period end		38,907,000		106,545,000
Modified to Interest Only [Member]
Schedule of TDR by class and modification type
No. of Loans		1	7	3
Recorded investment at period end		95,000	1,028,000	659,000
Modified to Interest Only [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of TDR by class and modification type
No. of Loans			1	1
Recorded investment at period end			309,000	223,000
Modified to Interest Only [Member] | Commercial [Member] | Raw Land and Lots [Member]
Schedule of TDR by class and modification type
No. of Loans			3	1
Recorded investment at period end			260,000	341,000
Modified to Interest Only [Member] | Commercial [Member] | Single Family Investment Real Estate [Member]
Schedule of TDR by class and modification type
No. of Loans		1	2	1
Recorded investment at period end		95,000	176,000	95,000
Modified to Interest Only [Member] | Consumer [Member] | Indirect Marine [Member]
Schedule of TDR by class and modification type
No. of Loans			1
Recorded investment at period end			283,000
Term modification, at a market rate [Member]
Schedule of TDR by class and modification type
No. of Loans	3	24	17	84
Recorded investment at period end	835,000	38,266,000	4,318,000	92,117,000
Term modification, at a market rate [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member]
Schedule of TDR by class and modification type
No. of Loans		3	3	5
Recorded investment at period end		3,869,000	1,809,000	5,035,000
Term modification, at a market rate [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of TDR by class and modification type
No. of Loans	2	2	2	16
Recorded investment at period end	720,000	2,572,000	720,000	21,655,000
Term modification, at a market rate [Member] | Commercial [Member] | Raw Land and Lots [Member]
Schedule of TDR by class and modification type
No. of Loans		4	1	14
Recorded investment at period end		18,625,000	603,000	27,596,000
Term modification, at a market rate [Member] | Commercial [Member] | Single Family Investment Real Estate [Member]
Schedule of TDR by class and modification type
No. of Loans		1		10
Recorded investment at period end		2,616,000		7,286,000
Term modification, at a market rate [Member] | Commercial [Member] | Commercial and Industrial [Member]
Schedule of TDR by class and modification type
No. of Loans	1	5	6	12
Recorded investment at period end	115,000	2,729,000	432,000	5,623,000
Term modification, at a market rate [Member] | Commercial [Member] | Other Commercial [Member]
Schedule of TDR by class and modification type
No. of Loans		2		5
Recorded investment at period end		457,000		911,000
Term modification, at a market rate [Member] | Commercial [Member] | Commercial Construction [Member]
Schedule of TDR by class and modification type
No. of Loans		5		15
Recorded investment at period end		7,072,000		22,940,000
Term modification, at a market rate [Member] | Consumer [Member] | Mortgage [Member]
Schedule of TDR by class and modification type
No. of Loans		1	2	4
Recorded investment at period end		56,000	472,000	538,000
Term modification, at a market rate [Member] | Consumer [Member] | Other Consumer [Member]
Schedule of TDR by class and modification type
No. of Loans		1	3	3
Recorded investment at period end		270,000	282,000	533,000
Term modification, below market rate [Member]
Schedule of TDR by class and modification type
No. of Loans	2	2	6	18
Recorded investment at period end	129,000	546,000	783,000	13,769,000
Term modification, below market rate [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member]
Schedule of TDR by class and modification type
No. of Loans		2	4	2
Recorded investment at period end		546,000	654,000	546,000
Term modification, below market rate [Member] | Commercial [Member] | Raw Land and Lots [Member]
Schedule of TDR by class and modification type
No. of Loans	1		1	6
Recorded investment at period end	60,000		60,000	6,391,000
Term modification, below market rate [Member] | Commercial [Member] | Single Family Investment Real Estate [Member]
Schedule of TDR by class and modification type
No. of Loans				4
Recorded investment at period end				2,506,000
Term modification, below market rate [Member] | Commercial [Member] | Commercial and Industrial [Member]
Schedule of TDR by class and modification type
No. of Loans				2
Recorded investment at period end				368,000
Term modification, below market rate [Member] | Commercial [Member] | Other Consumer [Member]
Schedule of TDR by class and modification type
No. of Loans	1		1
Recorded investment at period end	69,000		69,000
Term modification, below market rate [Member] | Commercial [Member] | Commercial Construction [Member]
Schedule of TDR by class and modification type
No. of Loans				3
Recorded investment at period end				3,451,000
Term modification, below market rate [Member] | Consumer [Member] | Mortgage [Member]
Schedule of TDR by class and modification type
No. of Loans				1
Recorded investment at period end				507,000
Interest Rate Modification, Below Market Rate [Member]
Schedule of TDR by class and modification type
No. of Loans	5		32
Recorded investment at period end	964,000		8,519,000
Interest Rate Modification, Below Market Rate [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of TDR by class and modification type
Recorded investment at period end			2,390,000
Interest Rate Modification, Below Market Rate [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of TDR by class and modification type
No. of Loans			2
Recorded investment at period end			$ 2,390,000