v3.26.1
Long Term Debt - Schedule of Aggregate Principal Balance and Net Carrying Value of Finance Receivables Pledged to Securitization Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Asset Pledged as Collateral without Right    
Debt Instrument [Line Items]    
Aggregate Principal Balance $ 584,336 $ 490,303
Asset Pledged as Collateral with Right    
Debt Instrument [Line Items]    
Fair Value 520,862 441,084
United Auto Credit 2022-2 | Asset Pledged as Collateral without Right    
Debt Instrument [Line Items]    
Aggregate Principal Balance 17,629 28,924
United Auto Credit 2022-2 | Asset Pledged as Collateral with Right    
Debt Instrument [Line Items]    
Fair Value 16,774 25,869
United Auto Credit 2023-1 | Asset Pledged as Collateral without Right    
Debt Instrument [Line Items]    
Aggregate Principal Balance 33,489 51,291
United Auto Credit 2023-1 | Asset Pledged as Collateral with Right    
Debt Instrument [Line Items]    
Fair Value 26,174 44,224
United Auto Credit 2024-1 | Asset Pledged as Collateral without Right    
Debt Instrument [Line Items]    
Aggregate Principal Balance 109,496 152,603
United Auto Credit 2024-1 | Asset Pledged as Collateral with Right    
Debt Instrument [Line Items]    
Fair Value 94,707 134,903
United Auto Credit 2025-1 | Asset Pledged as Collateral without Right    
Debt Instrument [Line Items]    
Aggregate Principal Balance 189,142 257,485
United Auto Credit 2025-1 | Asset Pledged as Collateral with Right    
Debt Instrument [Line Items]    
Fair Value 170,520 236,088
United Auto Credit 2026-1-A | Asset Pledged as Collateral without Right    
Debt Instrument [Line Items]    
Aggregate Principal Balance 234,580 0
United Auto Credit 2026-1-A | Asset Pledged as Collateral with Right    
Debt Instrument [Line Items]    
Fair Value $ 212,687 $ 0