Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Investments in Qualified Affordable Housing Partnerships, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investments in Qualified Affordable Housing Partnerships, Net [Abstract]
Minimum compliance period to fully utilize tax credits	15 years
Investments in qualified affordable housing partnerships, net	$ 207,037	$ 184,873
Accrued expenses and other liabilities — Unfunded commitments	80,294	80,764
Tax credits and other tax benefits recognized	46,034	39,262	$ 46,698
Amortization expense included in income tax expense	$ 36,561	$ 28,046	$ 38,464