Other Assets - Other (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Carrying value:
Capitalized software, net	$ 148,736	$ 157,460
Margin deposits	135,645	55,968
Operating lease right-of-use assets	$ 49,926	$ 65,866
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Prepaid expenses	$ 36,044	$ 38,780
Servicing fee receivables, net	37,271	31,356
Interest receivable	35,196	24,110
Other servicing receivables	30,530	24,854
Furniture, fixtures, equipment and building improvements, net	19,016	28,382
Deposits securing Assets sold under agreements to repurchase and Notes payable secured by mortgage servicing assets	15,653	12,277
Real estate acquired in settlement of loans	14,982	11,497
Other	59,461	33,223
Other assets	582,460	483,773
Asset Pledged as Collateral without Right
Carrying value:
Other assets	15,653	12,277
Asset Pledged as Collateral without Right | Deposits.
Carrying value:
Other assets	$ 15,653	$ 12,277