Comprehensive Income/Loss (Comprised of the following Components) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (114,827)	$ (163,084)
Net change in other comprehensive income (loss)	$ 5,113	$ (16,990)	602	10,149
Ending Balance	(114,225)	(152,935)	(114,225)	(152,935)
Unrealized Gain (Loss) on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(96,231)	(128,657)
Net change in other comprehensive income (loss)			384	5,617
Ending Balance	(95,847)	(123,040)	(95,847)	(123,040)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(20,575)	(36,630)
Net change in other comprehensive income (loss)			247	4,715
Ending Balance	(20,328)	(31,915)	(20,328)	(31,915)
Defined Benefit Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			1,979	2,203
Net change in other comprehensive income (loss)			(29)	(183)
Ending Balance	1,950	2,020	1,950	2,020
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net change in other comprehensive income (loss)	$ 5,113	$ (16,990)	$ 602	$ 10,149