Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 7,743	$ 12,163	$ 22,352	$ 36,712
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Securities Holding Loss Arising During the Period	(5,786)	(20,801)	(3,536)	(52,808)
Net Unrealized Gain on Cash Flow Hedge Agreements	625	778	91	2,781
Reclassification of Net Unrealized Gain on Cash Flow Hedge Agreements to Interest Expense	181	55	491	42
Amortization of Net Retirement Plan Actuarial (Gain) Loss	(30)	420	(90)	441
Amortization of Net Retirement Plan Prior Service Cost	39	42	115	127
Other Comprehensive Loss	(4,971)	(19,506)	(2,929)	(49,417)
Comprehensive Income (Loss)	$ 2,772	$ (7,343)	$ 19,423	$ (12,705)