Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses	$ 122,753	$ 54,664
Interest on nonaccrual loans	3,335	4,550
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	5,298	5,809
Deferred Tax Assets, Property, Plant and Equipment	0	3,478
Deferred tax assets, unrealized losses on other real estate owned	334	263
Deferred Tax Assets, State Taxes	3,108	5,721
Deferred Tax Assets, Operating Loss Carryforwards	34,658	39,517
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	20,477	28,158
Unrealized Loss From FDIC Assisted Acquisitions	1,310	1,678
Deferred Tax Assets, Investments	2,155	5,052
Deferred Tax Assets, Equity Method Investments	2,115	5,953
Deferred Tax Assets, Goodwill and Intangible Assets	451	5,434
Tax Credit Carryforward, Deferred Tax Asset	2,232	3,426
Lease liability	38,521	40,533
Deferred Tax Assets, Gross	236,747	204,236
Deferred Tax Assets, Valuation Allowance	(41,083)	(46,371)
Deferred Tax Assets, Net of Valuation Allowance	195,664	157,865
Deferred Tax Liabilities, Goodwill and Intangible Assets	5,877	9,853
Deferred Tax Liabilities, Tax Deferred Income	3,763	5,330
Deferred Tax Liabilities, Other Comprehensive Income	66,098	30,438
Deferred Tax Liabilities, Property, Plant and Equipment	3,120	0
Deferred Tax Liabilities, Regulatory Assets	637	647
Deferred Tax Liabilities, Subordinated Debt	18,639	20,183
Deferred Tax Liabilities, Leasing Arrangements	95,026	83,878
ROU assets	33,345	36,359
Deferred Tax Liabilities, Other	794	2,830
Deferred Tax Liabilities, Gross	227,299	189,518
Deferred Tax Asset (Liability)	$ (31,635)	$ (31,653)