Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated other comprehensive income (loss), beginning balance	$ (157,800)
Net other comprehensive income (loss)	16,647	$ (137,819)	$ (12,590)
Accumulated other comprehensive income (loss), ending balance	(141,153)	(157,800)
Net Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance	(131,033)	(6,795)	9,881
Other comprehensive income (loss) before reclassifications, net of tax	14,442	(124,238)	(16,676)
Amounts reclassified from accumulated other comprehensive income, net of tax	0	0	0
Net other comprehensive income (loss)	14,442	(124,238)	(16,676)
Accumulated other comprehensive income (loss), ending balance	(116,591)	(131,033)	(6,795)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance	(22,645)	(4,013)	(1,447)
Other comprehensive income (loss) before reclassifications, net of tax	1,301	(20,781)	(2,331)
Amounts reclassified from accumulated other comprehensive income, net of tax	5,725	2,149	(235)
Net other comprehensive income (loss)	7,026	(18,632)	(2,566)
Accumulated other comprehensive income (loss), ending balance	(15,619)	(22,645)	(4,013)
Net Unrealized Gains (Losses) on Defined Benefit Plan Obligations [Member]
Accumulated other comprehensive income (loss), beginning balance	(4,122)	(9,173)	(15,825)
Other comprehensive income (loss) before reclassifications, net of tax	(5,000)	3,750	4,491
Amounts reclassified from accumulated other comprehensive income, net of tax	179	1,301	2,161
Net other comprehensive income (loss)	(4,821)	5,051	6,652
Accumulated other comprehensive income (loss), ending balance	(8,943)	(4,122)	(9,173)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss), beginning balance	(157,800)	(19,981)	(7,391)
Other comprehensive income (loss) before reclassifications, net of tax	10,743	(141,269)	(14,516)
Amounts reclassified from accumulated other comprehensive income, net of tax	5,904	3,450	1,926
Net other comprehensive income (loss)	16,647	(137,819)	(12,590)
Accumulated other comprehensive income (loss), ending balance	$ (141,153)	$ (157,800)	$ (19,981)