Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 49,857	$ 40,827	$ 37,475
Other Comprehensive Income, Net of Tax:
Unrealized Net Securities Holding (Losses) Gains Arising During the Year	(6,413)	5,306	4,162
Reclassification Adjustment for Net Securities Losses Arising During the Year	0	28	0
Net Unrealized Gains on Cash Flow Hedge Agreements	929	485	0
Reclassification of Net Unrealized Gain on Cash Flow Hedge Agreements to Interest Expense	(94)	0	0
Net Retirement Plan Gain (Loss)	6,500	(251)	2,614
Net Retirement Plan Prior Service Cost	0	(353)	0
Amortization of Net Retirement Plan Actuarial Loss	68	169	510
Amortization of Net Retirement Plan Prior Service Cost	173	157	167
Other Comprehensive Income	1,163	5,541	7,453
Comprehensive Income	$ 51,020	$ 46,368	$ 44,928