Noninterest Income - Summary of Other Noninterest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,056,842	$ 880,951	$ 511,656
Net gains (losses) on revaluation of foreign currency instruments, net of foreign exchange forward contracts(1)	(926)	345	666
Losses on extinguishment of debt	0	(8,960)	0
Other service revenue	30,093	31,463	28,176
Other	98,145	55,370	51,858
Gains From Conversion Of Convertible Debt Options	30,018	0	0
Fund management fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 38,960	$ 32,522	$ 23,016