Other Comprehensive Income (Loss) (Activity in Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2021		Jun. 30, 2020		Jun. 30, 2021		Jun. 30, 2020
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Changes in fair value of available for sale debt securities, before tax		$ 5,440		$ (2,364)		$ (12,085)		$ 14,376
Changes in fair value of available for sale debt securities, tax		1,306		(556)		(2,900)		3,378
Changes in fair value of available for sale debt securities		4,134		(1,808)		(9,185)		10,998
Change in fair value of cash flow hedges, before tax		158		(293)		267		(1,848)
Change in fair value of cash flow hedges, tax		38		(69)		64		(434)
Change in fair value of cash flow hedges		120		(224)		203		(1,414)
Net cash flow hedge losses reclassified into earnings, before tax		(65)	[1]	305	[2]	216	[1]	485	[2]
Net cash flow hedge losses reclassified into earnings, tax		(15)	[1]	73	[2]	52	[1]	113	[2]
Net cash flow hedge losses reclassified into earnings		(50)	[1]	232	[2]	164	[1]	372	[2]
Net change in fair value of cash flow hedges, before tax		93		12		483		(1,363)
Net change in fair value of cash flow hedges, tax		23		4		116		(321)
Net change in fair value of cash flow hedges		70		8		367		(1,042)
Amortization of net actuarial losses, before tax	[3]	877		535		1,422		1,071
Amortization of net actuarial losses, tax	[3]	203		126		341		252
Amortization of net actuarial losses	[3]	674		409		1,081		819
Total other comprehensive income (loss), before tax		6,410		(1,817)		(10,180)		14,084
Total other comprehensive income (loss), tax		1,532		(426)		(2,443)		3,309
Total other comprehensive income (loss), net of tax		$ 4,878		$ (1,391)		$ (7,737)		$ 10,775

[1] The pre-tax amounts for the three months ended June 30, 2021 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 for the three months ended June 30, 2020 are included in interest expense on FHLB advances, interest expense on junior subordinated debentures and interest and fees on loans in the Unaudited Consolidated Statements of Income.

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