Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated other comprehensive income (loss), beginning balance			$ (157,800)
Total other comprehensive income (loss), net of tax	$ (7,067)	$ (38,590)	8,973	$ (98,060)
Accumulated other comprehensive income (loss), ending balance	(148,827)		(148,827)
Net Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance	(117,835)	(56,255)	(131,033)	(6,795)
Other comprehensive income (loss) before reclassifications	(9,827)	(35,942)	3,371	(85,402)
Amounts reclassed from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income (loss), net of tax	(9,827)	(35,942)	3,371	(85,402)
Accumulated other comprehensive income (loss), ending balance	(127,662)	(92,197)	(127,662)	(92,197)
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance	(19,848)	(14,348)	(22,645)	(4,013)
Other comprehensive income (loss) before reclassifications	1,289	(2,997)	2,084	(13,030)
Amounts reclassed from accumulated other comprehensive income (loss)	1,426	24	3,428	(278)
Total other comprehensive income (loss), net of tax	2,715	(2,973)	5,512	(13,308)
Accumulated other comprehensive income (loss), ending balance	(17,133)	(17,321)	(17,133)	(17,321)
Pension Benefit Adjustment [Member]
Accumulated other comprehensive income (loss), beginning balance	(4,077)	(8,848)	(4,122)	(9,173)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassed from accumulated other comprehensive income (loss)	45	325	90	650
Total other comprehensive income (loss), net of tax	45	325	90	650
Accumulated other comprehensive income (loss), ending balance	(4,032)	(8,523)	(4,032)	(8,523)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss), beginning balance	(141,760)	(79,451)	(157,800)	(19,981)
Other comprehensive income (loss) before reclassifications	(8,538)	(38,939)	5,455	(98,432)
Amounts reclassed from accumulated other comprehensive income (loss)	1,471	349	3,518	372
Total other comprehensive income (loss), net of tax	(7,067)	(38,590)	8,973	(98,060)
Accumulated other comprehensive income (loss), ending balance	$ (148,827)	$ (118,041)	$ (148,827)	$ (118,041)