Other Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Other Investment Not Readily Marketable [Line Items]
Cash surrender value of BOLI	$ 201,884	$ 199,029
LIHTC investments	200,352	75,149
Operating lease ROU assets, net (2)	121,887	129,301
Interest receivable	86,540	81,479
Taxes receivable	42,243	31,591
Equity investments without readily determinable fair values	33,783	27,738
SBIC Investments	27,357	16,505
Prepaid expenses	23,972	17,099
Equity warrants	4,742	3,434
Equity investments with readily determinable fair values	1,135	2,998
Deferred tax assets, net	1,080	0
Other receivables/assets	52,248	52,488
Other assets	797,223	$ 636,811
Increase of investment in low income housing project partnerships	$ 101,000