Schedule of Loans Renegotiated in Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012 notes		Jun. 30, 2012 notes		Dec. 31, 2011
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Loans Renegotiated in Troubled Debt Restructurings	$ 90,663		$ 90,663		$ 94,827
Loans Renegotiated in Troubled Debt Restructurings, Non-Accrual Loans	54,704		54,704		57,451
Loans Renegotiated in Troubled Debt Restructurings, Accrual Loans	35,959		35,959		37,376
Number of Notes	5,000		24,000
Principle Balance at Restructure Date	3,234		17,348
Number of Notes	17,000		22,000
Balance	5,007		7,464
Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		581
Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	298		421
Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	2,787		3,876
Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	149	[1]	12,470	[1]
Commercial real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes	3,000		12,000
Principle Balance at Restructure Date	2,936		12,488
Number of Notes	13,000		13,000
Balance	4,363		4,363
Commercial real estate | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Commercial real estate | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Commercial real estate | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	2,787		3,876
Commercial real estate | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	149	[1]	8,612	[1]
Land acquisition & development construction real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes	1,000		3,000
Principle Balance at Restructure Date	229		852
Number of Notes	2,000		3,000
Balance	380		885
Land acquisition & development construction real estate | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Land acquisition & development construction real estate | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	229		229
Land acquisition & development construction real estate | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Land acquisition & development construction real estate | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0	[1]	623	[1]
Commercial construction real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes			1,000
Principle Balance at Restructure Date			3,155
Commercial construction real estate | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			0
Commercial construction real estate | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			0
Commercial construction real estate | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			0
Commercial construction real estate | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			3,155
Total construction loans
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes	1,000		4,000
Principle Balance at Restructure Date	229		4,007
Number of Notes	2,000		3,000
Balance	380		885
Total construction loans | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Total construction loans | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	229		229
Total construction loans | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Total construction loans | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0	[1]	3,778	[1]
Residential real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes			2,000
Principle Balance at Restructure Date			593
Residential real estate | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			568
Residential real estate | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			25
Residential real estate | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			0
Residential real estate | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			0	[1]
Total real estate loans
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes	4,000		18,000
Principle Balance at Restructure Date	3,165		17,088
Number of Notes	15,000		18,000
Balance	4,743		6,872
Total real estate loans | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		568
Total real estate loans | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	229		254
Total real estate loans | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	2,787		3,876
Total real estate loans | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	149	[1]	12,390	[1]
Other consumer
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes	1,000		1,000
Principle Balance at Restructure Date	69		69
Other consumer | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Other consumer | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	69		69
Other consumer | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Other consumer | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0	[1]	0	[1]
Total consumer loans
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes	1,000		1,000
Principle Balance at Restructure Date	69		69
Total consumer loans | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Total consumer loans | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	69		69
Total consumer loans | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0		0
Total consumer loans | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date	0	[1]	0	[1]
Commercial
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			191
Number of Notes	1,000		1,000
Balance	25		25
Commercial | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes			5,000
Principle Balance at Restructure Date			13
Commercial | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			98
Commercial | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			0
Commercial | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Principle Balance at Restructure Date			80
Agricultural real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes	0		2,000
Balance	0		1,624
Agricultural
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes	1,000		3,000
Balance	$ 239		$ 567

[1] Other includes concessions that reduce or defer payments for a specified period of time and/or extend amortization schedules.