Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Allowance for loan losses	$ 76,407	$ 77,045
Loan purchase accounting adjustments	164	485
State net operating loss	3,348	3,591
Lease liability	28,226	26,207
Net unrealized losses on securities available-for-sale and cash flow hedges	148,825	195,090
Derivatives	26,344	38,082
Other	15,553	10,085
Gross deferred tax assets	298,867	350,585
Valuation allowance	(5,145)	(3,591)
Net deferred tax assets	293,722	346,994
Employee compensation and benefits	(9,895)	(8,399)
Fixed assets & intangibles	(28,129)	(26,589)
Lease financing	(56,576)	(52,385)
Right-of-use asset	(23,773)	(21,809)
Other	(21,965)	(26,394)
Gross deferred tax liabilities	(140,338)	(135,576)
Net deferred tax asset	$ 153,384	$ 211,418