Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost of non-recourse securitization obligations	$ 1,790,000	$ 1,650,000
Fair value of non-recourse securitization obligations	1,710,000	1,520,000
Difference between amortized cost and fair value of non-recourse securitization obligations	80,300	124,300
Amortized cost and fair value of these investments	20,992	20,680
Amortized cost
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost and fair value of these investments	21,000	20,600
Fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized cost and fair value of these investments	16,900	16,600
Residential mortgage loans in securitization trusts - at fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Difference between amortized cost and fair value of non-recourse securitization obligations	$ 61,800	$ 68,800