Other Comprehensive Income (Loss) (Activity in Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Changes in fair value of available for sale debt securities, before tax		$ (61,931)	$ (4,127)	$ (174,302)	$ (16,212)
Changes in fair value of available for sale debt securities, tax		(14,864)	(990)	(41,833)	(3,890)
Changes in fair value of available for sale debt securities, net of tax		(47,067)	(3,137)	(132,469)	(12,322)
Changes in fair value of cash flow hedges, before tax		(10,250)	(288)	(27,394)	(21)
Changes in fair value of cash flow hedges, tax		(2,460)	(69)	(6,574)	(5)
Change in fair value of cash flow hedges , net of tax		(7,790)	(219)	(20,820)	(16)
Net cash flow hedge (gains) losses reclassified into earnings, before tax	[1]	1,075	(243)	709	(27)
Net cash flow hedge (gains) losses reclassified into earnings, tax		258	(59)	170	(7)
Net cash flow hedge (gains) losses reclassified into earnings, net of tax		817	(184)	539	(20)
Net change in fair value of cash flow hedges, before tax		(9,175)	(531)	(26,685)	(48)
Net change in fair value of cash flow hedges, tax		(2,202)	(128)	(6,404)	(12)
Net change in fair value of cash flow hedges, net of tax		(6,973)	(403)	(20,281)	(36)
Amortization of net actuarial losses, before tax	[2]	428	711	1,284	2,133
Amortization of net actuarial losses, tax		102	171	308	512
Amortization of net actuarial losses, net of tax		326	540	976	1,621
Total other comprehensive income (loss), before tax		(70,678)	(3,947)	(199,703)	(14,127)
Total other comprehensive income (loss), tax		(16,964)	(947)	(47,929)	(3,390)
Total other comprehensive income (loss), net of tax		$ (53,714)	$ (3,000)	$ (151,774)	$ (10,737)

[1] The pre-tax amounts are included in interest and fees on loans and FHLB interest expense in the Unaudited Consolidated Statements of Income.

[2] The pre-tax amounts are included in other expenses in the Unaudited Consolidated Statements of Income.