Annual report [Section 13 and 15(d), not S-K Item 405]

Cash, Cash Equivalents and Restricted Cash - Restricted Cash and Cash Equivalents (Details)

v3.25.4
Cash, Cash Equivalents and Restricted Cash - Restricted Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Restricted Cash and Cash Equivalent Item [Line Items]    
Total $ 219,633 $ 313,028
For securities trading activity    
Restricted Cash and Cash Equivalent Item [Line Items]    
Total 350 950
For derivatives trading activity    
Restricted Cash and Cash Equivalent Item [Line Items]    
Total 50,094 43,398
For servicing activities    
Restricted Cash and Cash Equivalent Item [Line Items]    
Total 60,398 49,900
As restricted collateral for borrowings    
Restricted Cash and Cash Equivalent Item [Line Items]    
Total 108,723 218,715
Total restricted cash balances held by trading counterparties    
Restricted Cash and Cash Equivalent Item [Line Items]    
Total 219,565 312,963
Restricted cash balance pursuant to letter of credit on office lease    
Restricted Cash and Cash Equivalent Item [Line Items]    
Total $ 68 $ 65