Accumulated Other Comprehensive Income (Loss) (Schedule of Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss)	$ (164,955)	$ (24,970)
Unrealized Loss on Securities Available for Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss)	(213,862)	(32,067)
Deferred tax asset	49,145	7,369
Total accumulated other comprehensive income (loss)	(164,717)	(24,698)
Postretirement Plans Asset (Liability)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss)	(309)	(353)
Deferred tax asset	71	81
Total accumulated other comprehensive income (loss)	(238)	(272)
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss)	$ (164,955)	$ (24,970)