Other Assets (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Other Assets [Abstract]
Cash surrender value of BOLI		$ 202,725	$ 203,031
LIHTC investments		279,608	213,034
Operating lease ROU assets, net (1)	[1]	124,926	119,787
Interest receivable		109,855	101,596
Taxes receivable		16,898	59,565
Equity investments without readily determinable fair values		36,787	34,304
SBIC Investments		42,553	32,327
Prepaid expenses		28,512	22,999
Equity warrants	[2]	3,747	4,520
Equity investments with readily determinable fair values		18,829	6,147
Other receivables/assets		106,039	63,016
Other assets		$ 970,479	$ 860,326

[1] See Note 9. Leases for further details regarding the operating lease ROU assets.

[2] See Note 11. Derivatives for information regarding equity warrants.