Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated other comprehensive income (loss), beginning balance	$ (19,981)
Net other comprehensive income (loss)	(137,819)	$ (12,590)	$ 3,846
Accumulated other comprehensive income (loss), ending balance	(157,800)	(19,981)
Net Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance	(6,795)	9,881	3,226
Other comprehensive income (loss) before reclassifications, net of tax	(124,238)	(16,676)	6,655
Amounts reclassified from accumulated other comprehensive income, net of tax	0	0	0
Net other comprehensive income (loss)	(124,238)	(16,676)	6,655
Accumulated other comprehensive income (loss), ending balance	(131,033)	(6,795)	9,881
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance	(4,013)	(1,447)	(793)
Other comprehensive income (loss) before reclassifications, net of tax	(20,781)	(2,331)	(1,521)
Amounts reclassified from accumulated other comprehensive income, net of tax	2,149	(235)	867
Net other comprehensive income (loss)	(18,632)	(2,566)	(654)
Accumulated other comprehensive income (loss), ending balance	(22,645)	(4,013)	(1,447)
Net Unrealized Gains (Losses) on Defined Benefit Plan Obligations [Member]
Accumulated other comprehensive income (loss), beginning balance	(9,173)	(15,825)	(13,670)
Other comprehensive income (loss) before reclassifications, net of tax	3,750	4,491	(3,896)
Amounts reclassified from accumulated other comprehensive income, net of tax	1,301	2,161	1,741
Net other comprehensive income (loss)	5,051	6,652	(2,155)
Accumulated other comprehensive income (loss), ending balance	(4,122)	(9,173)	(15,825)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss), beginning balance	(19,981)	(7,391)	(11,237)
Other comprehensive income (loss) before reclassifications, net of tax	(141,269)	(14,516)	1,238
Amounts reclassified from accumulated other comprehensive income, net of tax	3,450	1,926	2,608
Net other comprehensive income (loss)	(137,819)	(12,590)	3,846
Accumulated other comprehensive income (loss), ending balance	$ (157,800)	$ (19,981)	$ (7,391)