Other Assets (Schedule of Significant Balances Included in Other Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Assets [Line Items]
Derivative assets	$ 6,908	$ 2,869
Derivative collateral	66,207	90,312
Investments in Low Income Housing Tax Credit entities	37,500	37,500
Total	447,738	568,330
Other Assets [Member]
Other Assets [Line Items]
Income tax receivable	128,092	101,301
Derivative assets	75,867	150,180
Derivative collateral	66,207	90,311
FHLB stock	52,743	104,708
Investments in Small Business Investment Companies and other	46,500	42,475
Investments in Low Income Housing Tax Credit entities	36,297	37,464
Other	42,032	41,891
Total	$ 447,738	$ 568,330