Income Tax - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Assets:
Differences in Accounting for Loan Losses	$ 19,785	$ 19,526
Differences in Accounting for Loan Fees	749	1,458
Differences in Accounting for Loans and Securities	710	3,681
Deferred Compensation	2,101	4,448
Federal & State Income Tax Loss Carryforward and Credits	6,954	10,829
Net Unrealized Loss on Securities Available for Sale	1,686
Other	2,028	365
Total Assets	34,013	40,307
Liabilities:
Differences in Depreciation Methods	6,496	5,245
Difference in Accounting for Pensions and Other Employee Benefits	566	823
State Income Tax	791	58
Net Unrealized Gain on Securities Available for Sale		2,898
Gain on FDIC Modified Whole Bank Transaction	487	602
Other	4,271	3,897
Total Liabilities	12,611	13,523
Net Deferred Tax Asset Before Valuation Allowance	21,402	26,784
Valuation allowance:
Beginning Balance	(6,966)	(9,815)
Decrease/(Increase) During the Year	6,966	2,849
Ending Balance	0	(6,966)
Net Deferred Tax Asset	$ 21,402	$ 19,818