Comprehensive Income/Loss (Comprised of the following Components) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (90,007)	$ (114,827)
Net change in other comprehensive income (loss)	19,805	(4,511)
Ending Balance	(70,202)	(119,338)
Unrealized Gain (Loss) on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(79,488)	(96,231)
Net change in other comprehensive income (loss)	16,394	(3,008)
Ending Balance	(63,094)	(99,239)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(13,862)	(20,575)
Net change in other comprehensive income (loss)	3,456	(1,488)
Ending Balance	(10,406)	(22,063)
Defined Benefit Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	3,343	1,979
Net change in other comprehensive income (loss)	(45)	(15)
Ending Balance	3,298	1,964
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net change in other comprehensive income (loss)	$ 19,805	$ (4,511)