Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses	$ 81,380	$ 97,385
Interest on nonaccrual loans	7,485	5,100
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	3,148	4,027
Deferred Tax Assets, Property, Plant and Equipment	7,395	5,867
Deferred tax assets, unrealized losses on other real estate owned	5,546	6,479
Assets acquired in FDIC-assisted acquisition	0	2,319
Deferred Tax Assets, State Taxes	7,187	6,101
Deferred Tax Assets, Operating Loss Carryforwards	57,416	125,678
Deferred Tax Assets, Capital Loss Carryforwards	17,740	35,597
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	43,366	40,733
Deferred Tax Assets, Other	7,207	0
Deferred Tax Assets, Equity Method Investments	15,195	16,712
Deferred Tax Assets, Goodwill and Intangible Assets	29,996	37,423
Tax Credit Carryforward, Deferred Tax Asset	16,493	35,874
Deferred Tax Assets, Gross	311,347	419,295
Deferred Tax Assets, Valuation Allowance	(100,920)	(121,138)
Deferred Tax Assets, Net of Valuation Allowance	210,427	298,157
Deferred Tax Liabilities, Goodwill and Intangible Assets	12,792	19,122
Deferred Tax Liabilities, Tax Deferred Income	13,389	16,283
Deferred Tax Liabilities, Other Comprehensive Income	4,118	19,224
Deferred Tax Liabilities, Regulatory Assets	1,098	1,067
Deferred Tax Liabilities, Subordinated Debt	37,499	39,242
Deferred Tax Liabilities, Leasing Arrangements	41,785	40,029
Unrealized income from FDIC-assisted acquisition	0	7,543
Deferred Tax Liabilities, Investments	0	17,087
Deferred Tax Assets, Investments	11,793	0
Deferred Tax Liabilities, Other	5,634	12,171
Deferred Tax Liabilities, Gross	116,315	171,768
Deferred Tax Assets, Net	$ 94,112	$ 126,389