Loans and Leases Held for Investment at Amortized Cost, Net of Allowance for Loan and Lease Losses - Schedule of Loan Modifications (Details) - Consumer - Unsecured personal - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Financing Receivable, Modified [Line Items]
Total loan modifications – unsecured personal loans	$ 11,515	$ 18,857	$ 18,875	$ 31,801
% of unsecured personal loans at amortized cost as of period end	0.30%	0.60%	0.60%	1.00%
Short-term payment reduction
Financing Receivable, Modified [Line Items]
Total loan modifications – unsecured personal loans	$ 6,892	$ 10,926	$ 12,686	$ 22,445
Permanent loan modification
Financing Receivable, Modified [Line Items]
Total loan modifications – unsecured personal loans	1,764	1,778	3,286	3,092
Debt settlement
Financing Receivable, Modified [Line Items]
Total loan modifications – unsecured personal loans	$ 2,859	$ 6,153	$ 2,903	$ 6,264

Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

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