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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 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	$ 192,913		$ 192,913		$ 207,037
Accrued expenses and other liabilities — Unfunded commitments	58,695		58,695		$ 80,294
Tax credits and other tax benefits recognized	11,402	$ 11,539	34,205	$ 34,871
Amortization expense included in income tax expense	$ 8,975	$ 8,452	$ 26,507	$ 27,006