Income Tax Income Tax - Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Differences in Accounting for Loan Losses	$ 28,788	$ 29,690
Differences in Accounting for Loan Fees	941	805
Differences in Accounting for Loan And Securities	477
Deferred Compensation	7,181	7,612
Difference in Accounting for Pensions and Other Employee Benefits	1,953	3,750
Federal & State Income Tax Loss Carryforward and Credits	9,356	12,416
Other	9,356	8,796
Total Assets	58,052	63,069
LIABILITIES
Differences in Depreciation Methods	6,050	5,859
Differences in Accounting for Loans and Securities		42
State Income Tax	354	354
Net Unrealized Gains on Securities Available for Sale	7,879	8,118
Gain On FDIC Modified Whole Bank Transaction	2,737
Other	1,051	1,137
Total Liabilities	18,071	15,510
Net Deferred Tax Asset, Before Valuation Allowance	39,981	47,559
Valuation allowance:
Beginning Balance	(15,701)	(13,258)
Increase During the Year	1,842	(2,443)
Ending Balance	(13,859)	(15,701)
Net Deferred Tax Asset	$ 26,122	$ 31,858