Comprehensive Income/Loss (Comprised of the following Components) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (90,007)	$ (114,827)
Net change in other comprehensive income (loss)	$ 10,521	$ 37,023	42,445	37,625
Ending Balance	(47,562)	(77,202)	(47,562)	(77,202)
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)			35,398	28,670
Ending Balance	(44,090)	(67,561)	(44,090)	(67,561)
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)			7,182	9,000
Ending Balance	(6,680)	(11,575)	(6,680)	(11,575)
Defined Benefit Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			3,343	1,979
Net change in other comprehensive income (loss)			(135)	(45)
Ending Balance	3,208	1,934	3,208	1,934
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net change in other comprehensive income (loss)	$ 10,521	$ 37,023	$ 42,445	$ 37,625