Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Allowance for loan losses	$ 47,008	$ 45,198
Employee compensation and benefits		12,796
Loan purchase accounting adjustments	18,717	1,132
Tax credit carryforward	2,025	2,059
Securities		17,390
Federal/State net operating loss	7,295	1,629
Lease liability	29,003
Other	7,893	18,431
Gross deferred tax assets	111,941	98,635
State valuation allowance	(1,415)	(1,629)
Net deferred tax assets	110,526	97,006
Employee compensation and benefits	(9,662)
Securities	(9,589)
Fixed assets & intangibles	(48,144)	(44,277)
Lease Financing	(41,565)	(23,605)
Right-of-use asset	(24,887)
Other	(14,400)	(6,157)
Gross deferred tax liabilities	(148,247)	(74,039)
Net deferred tax asset		$ 22,967
Net deferred tax (liability)	$ (37,721)