Other Assets - Other (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Carrying value:
Capitalized software, net	$ 109,480	$ 81,434
Deposits	36,632	153,054
Margin deposits	100,482	116,881
Prepaid Expense	64,924	53,975
Furniture, fixtures, equipment and building improvements, net	31,677	32,217
Net servicing fee receivables	23,672	54,679
Real estate acquired in settlement of loans	7,474	12,158
Other	242,275	187,771
Other assets	616,616	692,169
Assets pledged to secure Obligation under capital lease:
Capitalized software, net	4,546	7,675
Furniture, fixture, equipment and building improvements, net	4,116	5,689
Assets securing capital lease	$ 45,294	$ 166,418