Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 12,575	$ 13,280
Other Comprehensive (Loss) Income, Net of Tax:
Net Unrealized Securities Holding Loss Arising During the Period	(22,296)	(3,812)
Net Unrealized Gain on Cash Flow Hedge Agreements	1,125	1,475
Reclassification of Net Unrealized Gain on Cash Flow Hedge Agreements to Interest Expense	(21)	(20)
Amortization of Net Retirement Plan Actuarial Loss	42	34
Amortization of Net Retirement Plan Prior Service Cost	6	43
Other Comprehensive Loss	(21,144)	(2,280)
Comprehensive (Loss) Income	$ (8,569)	$ 11,000