Other Assets - Other (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Carrying value:
Capitalized software, net	$ 157,830	$ 157,460
Margin deposits	79,205	55,968
Servicing fee receivables, net	30,081	31,356
Other servicing receivables	46,719	24,854
Prepaid expenses	37,593	38,780
Interest receivable	35,701	24,110
Furniture, fixtures, equipment and building improvements, net	26,070	28,382
Deposits securing Assets sold under agreements to repurchase and Notes payable secured by mortgage servicing assets	31,909	12,277
Real estate acquired in settlement of loans	11,384	11,497
Derivative settlements receivable	7,517	1,522
Other	49,232	31,701
Other assets	513,241	417,907
Asset Pledged as Collateral without Right
Carrying value:
Other assets	31,909	12,277
Asset Pledged as Collateral without Right | Deposits.
Carrying value:
Other assets	31,909	12,277
Asset Pledged as Collateral without Right | Capitalized software
Carrying value:
Other assets	$ 21,074	$ 12,277