Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net [Abstract]
Minimum compliance period for qualified affordable housing partnerships to fully utilize the tax credits (in years)			15 years
Investments in qualified affordable housing partnerships, net	$ 178,344		$ 178,344		$ 183,917
Accrued expenses and other liabilities — Unfunded commitments	63,607		63,607		$ 57,243
Tax credits and other tax benefits recognized	15,840	$ 8,591	35,027	$ 26,561
Amortization expense included in income tax expense	$ 8,944	$ 6,612	$ 22,945	$ 20,923