Other Comprehensive Income (Loss) (Activity in Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023		Jun. 30, 2022
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Changes in fair value of available for sale debt securities, before tax		$ (12,929)		$ (47,293)		$ 4,436		$ (112,371)
Changes in fair value of available for sale debt securities, tax		3,102		11,351		(1,065)		26,969
Changes in fair value of available for sale debt securities, net of tax		(9,827)		(35,942)		3,371		(85,402)
Changes in fair value of cash flow hedges, before tax		1,696		(3,943)		2,742		(17,144)
Changes in fair value of cash flow hedges, tax		(407)		946		(658)		4,114
Change in fair value of cash flow hedges , net of tax		1,289		(2,997)		2,084		(13,030)
Net cash flow hedge (gains) losses reclassified into earnings, before tax		1,875	[1]	32	[1]	4,510	[2]	(367)	[2]
Net cash flow hedge (gains) losses reclassified into earnings, tax		(449)		(8)		(1,082)		89
Net cash flow hedge (gains) losses reclassified into earnings, net of tax		1,426		24		3,428		(278)
Net change in fair value of cash flow hedges, before tax		3,571		(3,911)		7,252		(17,511)
Net change in fair value of cash flow hedges, tax		(856)		938		(1,740)		4,203
Net change in fair value of cash flow hedges, net of tax		2,715		(2,973)		5,512		(13,308)
Amortization of net actuarial losses, before tax	[3]	60		428		119		856
Amortization of net actuarial losses, tax		(15)		(103)		(29)		(206)
Amortization of net actuarial losses, net of tax		45		325		90		650
Total other comprehensive income (loss), before tax		(9,298)		(50,776)		11,807		(129,026)
Total other comprehensive income (loss), tax		2,231		12,186		(2,834)		30,966
Total other comprehensive income (loss), net of tax		(7,067)		(38,590)		8,973		(98,060)
Interest Income
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Net cash flow hedge (gains) losses reclassified into earnings, before tax		2,100		(25)		4,900		(518)
Interest Expense
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Net cash flow hedge (gains) losses reclassified into earnings, before tax		$ (264)		$ 57		$ (391)		$ 151

[1] For the three months ended June 30, 2023 and 2022, the pre-tax amounts reclassified into earnings in the Unaudited Consolidated Statements of Income include a reduction of $2.1 million and an increase of $25 thousand, respectively, in interest and fees on loans, as well as a reduction of $264 thousand and an increase of $57 thousand, respectively, in FHLB interest expense.

[2] For the six months ended June 30, 2023 and 2022, the pre-tax amounts reclassified into earnings in the Unaudited Consolidated Statements of Income include a reduction of $4.9 million and an increase of $518 thousand, respectively, in interest and fees on loans, as well as a reduction of $391 thousand and an increase of $151 thousand, respectively, in FHLB interest expense.

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