v3.26.1
Commitments, Guarantees, Concentrations and Contingencies (Details)
3 Months Ended
Mar. 31, 2026
USD ($)
repurchase_obligation
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Lessee, Lease, Description [Line Items]      
Occupancy expense $ 9,968,000 $ 8,120,000  
Number of repurchase obligations | repurchase_obligation 3    
Estimated repurchase obligations $ 17,900,000   $ 18,400,000
Loans sold, subject to terms and conditions of repurchase obligations 15,600,000,000   15,700,000,000
Letters of credit outstanding with financial institutions 4,100,000   4,700,000
Collateral amount 700,000   1,300,000
Secured loans 1,381,174,000   1,516,736,000
Minimum net worth noncompliance, fines and penalties accrued 0   0
Funded Loan      
Lessee, Lease, Description [Line Items]      
Secured loans 7,900,000    
Unfunded Loan Commitment      
Lessee, Lease, Description [Line Items]      
Commitment to fund a line of credit 22,100,000    
Asset Pledged as Collateral      
Lessee, Lease, Description [Line Items]      
Letters of credit outstanding with financial institutions $ 46,700,000   $ 46,700,000
Minimum      
Lessee, Lease, Description [Line Items]      
Operating lease, renewal term 1 year    
Maximum      
Lessee, Lease, Description [Line Items]      
Operating lease, renewal term 10 years    
Maximum | Unfunded Loan Commitment      
Lessee, Lease, Description [Line Items]      
Commitment to fund a line of credit $ 30,000,000.0