Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Allowance for loan losses	$ 45,198	$ 51,517
Employee compensation and benefits	12,796	9,783
Loan purchase accounting adjustments	1,132	6,441
Tax credit carryforward	2,059	21,274
Securities	17,390	12,250
State net operating loss	1,629	1,979
Other	18,431	13,763
Gross deferred tax assets	98,635	117,007
State valuation allowance	(1,629)	(1,979)
Net deferred tax assets	97,006	115,028
Fixed assets & intangibles	(44,277)	(42,597)
Lease financing	(23,605)	(12,285)
Other	(6,157)	(6,167)
Gross deferred tax liabilities	(74,039)	(61,049)
Net deferred tax asset	$ 22,967	$ 53,979