Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accumulated other comprehensive income (loss), beginning balance	$ (157,800)
Total other comprehensive income (loss), net of tax	16,040	$ (59,470)
Accumulated other comprehensive income (loss), ending balance	(141,760)
Net Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance	(131,033)	(6,795)
Other comprehensive income (loss) before reclassifications	13,198	(49,460)
Amounts reclassed from accumulated other comprehensive income (loss)	0	0
Total other comprehensive income (loss), net of tax	13,198	(49,460)
Accumulated other comprehensive income (loss), ending balance	(117,835)	(56,255)
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance	(22,645)	(4,013)
Other comprehensive income (loss) before reclassifications	795	(10,033)
Amounts reclassed from accumulated other comprehensive income (loss)	2,002	(302)
Total other comprehensive income (loss), net of tax	2,797	(10,335)
Accumulated other comprehensive income (loss), ending balance	(19,848)	(14,348)
Pension Benefit Adjustment [Member]
Accumulated other comprehensive income (loss), beginning balance	(4,122)	(9,173)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassed from accumulated other comprehensive income (loss)	45	325
Total other comprehensive income (loss), net of tax	45	325
Accumulated other comprehensive income (loss), ending balance	(4,077)	(8,848)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss), beginning balance	(157,800)	(19,981)
Other comprehensive income (loss) before reclassifications	13,993	(59,493)
Amounts reclassed from accumulated other comprehensive income (loss)	2,047	23
Total other comprehensive income (loss), net of tax	16,040	(59,470)
Accumulated other comprehensive income (loss), ending balance	$ (141,760)	$ (79,451)