Other Assets (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Other Assets [Abstract]
Cash surrender value of BOLI		$ 204,177	$ 203,031
LIHTC investments		216,285	213,034
Operating lease ROU assets, net (1)	[1]	122,372	119,787
Interest receivable		100,107	101,596
Taxes receivable		33,744	59,565
Equity investments without readily determinable fair values		34,441	34,304
SBIC Investments		33,374	32,327
Prepaid expenses		21,384	22,999
Equity warrants	[2]	4,589	4,520
Equity investments with readily determinable fair values		10,266	6,147
Other receivables/assets		102,914	63,016
Other assets		$ 883,653	$ 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.