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, 2020	Dec. 31, 2019	Dec. 31, 2018
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	$ 213,555	$ 207,037
Accrued expenses and other liabilities — Unfunded commitments	77,444	80,294
Tax credits and other tax benefits recognized	45,971	46,034	$ 39,262
Amortization expense included in income tax expense	$ 37,132	$ 36,561	$ 28,046