Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Beginning Balance	$ (5,092)
Ending Balance	(19,351)
Unrealized Securities Gains (Losses) [Member]
Beginning Balance	(1,801,000)	$ 804,000
Change In Unrealized Securities Gains (losses), Net Of Tax	(14,259,000)	(1,114,000)
Ending Balance	(16,060,000)	(310,000)
Adjustments Related to Pension Plan [Member]
Beginning Balance	(3,291,000)	(3,821,000)
Change In Unrealized Securities Gains (losses), Net Of Tax	0	0
Ending Balance	(3,291,000)	(3,821,000)
Accumulated Other Comprehensive Loss [Member]
Beginning Balance	(5,092,000)	(3,017,000)
Change In Unrealized Securities Gains (losses), Net Of Tax	(14,259,000)	(1,114,000)
Ending Balance	$ (19,351,000)	$ (4,131,000)