Income Tax - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets:
Differences in Accounting for Loan Losses	$ 31,850	$ 19,717
Differences in Accounting for Loan Fees	4,328	442
Deferred Compensation	4,038	4,436
Federal & State Income Tax Loss Carryforward and Credits	2,089	6,205
Other	3,185	3,499
Total Assets	45,490	34,299
Liabilities:
Differences in Depreciation Methods	6,028	5,240
Differences in Accounting for Loans and Securities	2,840	1,192
Difference in Accounting for Pensions and Other Employee Benefits	1,258	1,556
State Income Tax	1,059	778
Net Unrealized Gain on Securities Available for Sale	23,389	10,333
Gain on FDIC Modified Whole Bank Transaction	359	413
Other	6,209	6,506
Total Liabilities	41,142	26,018
Net Deferred Tax Asset	$ 4,348	$ 8,281