Noninterest Income - Summary of Other Noninterest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 880,951	$ 511,656
Net gains (losses) on revaluation of foreign currency instruments, net of foreign exchange forward contracts(1)	345	666	$ 1,788
(Losses) gains on extinguishment of debt	(8,960)	0	2,731
Other service revenue	31,463	28,176	33,377
Other	55,370	51,858	59,110
Fund management fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 32,522	$ 23,016	$ 21,214