Comprehensive Income/Loss (Comprised of the following Components) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 2,183	$ 40,695
Net change in other comprehensive income (loss)	$ (69,605)	$ (11,000)	(181,252)	(22,128)
Ending Balance	(179,069)	18,567	(179,069)	18,567
Unrealized Gain (Loss) on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(9,667)	13,255
Net change in other comprehensive income (loss)			(128,872)	(11,878)
Ending Balance	(138,539)	1,377	(138,539)	1,377
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			14,137	33,276
Net change in other comprehensive income (loss)			(52,743)	(11,559)
Ending Balance	(38,606)	21,717	(38,606)	21,717
Defined Benefit Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(2,287)	(5,836)
Net change in other comprehensive income (loss)			363	1,309
Ending Balance	(1,924)	(4,527)	(1,924)	(4,527)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net change in other comprehensive income (loss)	$ (69,605)	$ (11,000)	$ (181,252)	$ (22,128)