Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Allowance for loan losses	$ 85,118	$ 111,170
Loan purchase accounting adjustments	1,838	1,681
Tax credit carryforward	2,326	5,700
Federal/state net operating loss	3,646	4,462
Lease liability	27,553	29,352
Other	9,704	17,801
Gross deferred tax assets	130,185	170,166
State valuation allowance	(3,646)	(3,635)
Net deferred tax assets	126,539	166,531
Employee compensation and benefits	(11,137)	(10,044)
Securities	(5,389)	(51,036)
Fixed assets & intangibles	(34,475)	(46,762)
Lease Financing	(54,127)	(54,581)
Right-of-use Asset	(23,075)	(24,872)
Other	(17,770)	(28,642)
Gross deferred tax liabilities	(145,973)	(215,937)
Net deferred tax liability	$ (19,434)	$ (49,406)