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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
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, And Related Unfunded Commitments [Abstract]
Investments in qualified affordable housing partnerships, net	$ 297,367		$ 297,367		$ 213,555
Accrued expenses and other liabilities — Unfunded commitments	148,171		148,171		$ 77,444
Additional Information related to Investments in Qualified Affordable Housing Partnerships, Net [Abstract]
Tax credits and other tax benefits recognized	7,503	$ 11,402	28,583	$ 34,205
Amortization expense included in income tax expense	$ 9,147	$ 8,975	$ 25,595	$ 26,507