Other Comprehensive Income (Loss) (Activity in Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 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		$ (47,293)	$ 5,440	$ (112,371)	$ (12,085)
Changes in fair value of available for sale debt securities, tax		(11,351)	1,306	(26,969)	(2,900)
Changes in fair value of available for sale debt securities, net of tax		(35,942)	4,134	(85,402)	(9,185)
Changes in fair value of cash flow hedges, before tax		(3,943)	158	(17,144)	267
Changes in fair value of cash flow hedges, tax		(946)	38	(4,114)	64
Change in fair value of cash flow hedges , net of tax		(2,997)	120	(13,030)	203
Net cash flow hedge (gains) losses reclassified into earnings, before tax	[1]	32	(65)	(367)	216
Net cash flow hedge (gains) losses reclassified into earnings, tax		8	(15)	(89)	52
Net cash flow hedge (gains) losses reclassified into earnings, net of tax		24	(50)	(278)	164
Net change in fair value of cash flow hedges, before tax		(3,911)	93	(17,511)	483
Net change in fair value of cash flow hedges, tax		(938)	23	(4,203)	116
Net change in fair value of cash flow hedges, net of tax		(2,973)	70	(13,308)	367
Amortization of net actuarial losses, before tax	[2]	428	877	856	1,422
Amortization of net actuarial losses, tax		103	203	206	341
Amortization of net actuarial losses, net of tax		325	674	650	1,081
Total other comprehensive income (loss), before tax		(50,776)	6,410	(129,026)	(10,180)
Total other comprehensive income (loss), tax		(12,186)	1,532	(30,966)	(2,443)
Total other comprehensive income (loss), net of tax		$ (38,590)	$ 4,878	$ (98,060)	$ (7,737)

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

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