Revenue - Interest Income and Fair Value Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Interest income	$ 15,134	$ 3,405
Interest expense	(959)	(1,030)
Fair value and other adjustments, net	(18,021)	2,800
Total interest income and fair value adjustments, net	(3,846)	$ 5,175
Gain (loss) on transfer of loans	$ 1,300		$ 2,800
Income from capital market program, net			$ 1,000