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	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities [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	$ 201,888		$ 201,888		$ 207,037
Accrued expenses and other liabilities — Unfunded commitments	72,655		72,655		$ 80,294
Tax credits and other tax benefits recognized	11,772	$ 11,506	22,803	$ 23,332
Amortization expense included in income tax expense	$ 9,148	$ 9,657	$ 17,532	$ 18,554