Income Tax - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Assets:
Differences in Accounting for Loan Losses	$ 25,867	$ 26,665
Differences in Accounting for Loan Fees	762	747
Differences in Accounting for Loans and Securities	9,359	9,910
Deferred Compensation	5,100	5,234
Difference in Accounting for Pensions and Other Employee Benefits	2,247	1,084
Federal & State Income Tax Loss Carryforward and Credits	23,737	23,977
Other	9,310	8,535
Total Assets	76,382	76,152
Liabilities:
Differences in Depreciation Methods	7,742	8,220
State Income Tax	591	591
Net Unrealized Gain on Securities Available for Sale	6,636	7,591
Gain on FDIC Modified Whole Bank Transaction	1,405	1,694
Other	717	1,096
Total Liabilities	17,091	19,192
Net Deferred Tax Asset Before Valuation Allowance	59,291	56,960
Valuation allowance:
Beginning Balance	(17,568)	(17,171)
Decrease/(Increase) During the Year	1,832	(397)
Ending Balance	(15,736)	(17,568)
Net Deferred Tax Asset	$ 43,555	$ 39,392