Tax Effects on Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pre-Tax Amount
Other Comprehensive Loss	$ (20,411)	$ 26,232	$ 14,537
Tax Benefit (Expense)
Other Comprehensive Income	4,350	(5,591)	(3,100)
Net of Tax Amount
Other comprehensive income (loss)	(16,061)	20,641	11,437
Accumulated Net Investment Gain (Loss) Attributable to Parent
Pre-Tax Amount
Net change in unrealized gains on debt securities available-for sale	(23,972)	22,683	15,793
Net available-for-sale securities (gains) losses reclassified into earnings	0	0	26
Tax Benefit (Expense)
Net change in unrealized gains on debt securities available-for sale	5,115	(4,827)	(3,367)
Net available-for-sale securities (gains) losses reclassified into earnings	0	0	(6)
Net of Tax Amount
Net change in unrealized gains on debt securities available-for sale	(18,857)	17,856	12,426
Net available-for-sale securities (gains) losses reclassified into earnings	0	0	20
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Pre-Tax Amount
Other Comprehensive Loss	3,561	3,549	(1,282)
Tax Benefit (Expense)
Other Comprehensive Income	(765)	(764)	273
Net of Tax Amount
Other comprehensive income (loss)	$ 2,796	$ 2,785	$ (1,009)