Long-Term Debt - Narrative (Details) | | | 1 Months Ended | 3 Months Ended | | | |
Mar. 05, 2021 USD ($) | Jun. 05, 2019 USD ($) extensionTerm | Aug. 31, 2022 USD ($) renewalPeriod | Mar. 31, 2020 USD ($) | Mar. 31, 2023 USD ($) extensionTerm Rate | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) | Aug. 12, 2022 USD ($) | Dec. 31, 2021 USD ($) |
Debt Instrument [Line Items] | | | | | | | | | |
Threshold percentage | | | | | 50% | | | | |
Cash sweeping event | Rate | | | | | 175% | | | | |
Rapid amortization event | Rate | | | | | 120% | | | | |
Manager termination event | Rate | | | | | 120% | | | | |
Interest-only debt service coverage ratio, default event | Rate | | | | | 110% | | | | |
Unamortized debt issuance costs | | | | | $ 4,500,000 | | $ 5,100,000 | | |
Gain on extinguishment of debt | | | | | $ 1,661,000 | $ 0 | | | |
Series 2019-1 4.723% Fixed Rate Senior Secured Notes, Class A-2-II and Series 2019-1 4.194% Fixed Rate Senior Secured Notes, Class A-2-I | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Number of tranches issued | extensionTerm | | 2 | | | | | | | |
Series 2019-1 4.194% Fixed Rate Senior Secured Notes, Class A-2-I | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Debt interest rate (percent) | | 4.194% | | | 4.194% | | 4.194% | | |
Debt instrument, face amount | | $ 700,000,000 | | | | | | | |
Make-whole premium | | | | | $ 0 | | | | |
Series 2019-1 4.194% Fixed Rate Senior Secured Notes, Class A-2-I | Ten Year United States Treasury Bill Rate | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Basis spread on variable rate | | 2.15% | | | | | | | |
Series 2019-1 4.723% Fixed Rate Senior Secured Notes, Class A-2-II | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Debt interest rate (percent) | | 4.723% | | | 4.723% | | 4.723% | | |
Debt instrument, face amount | | $ 600,000,000 | | | | | | | |
Make-whole premium | | | | | $ 1,800,000 | | | | |
Series 2019-1 4.723% Fixed Rate Senior Secured Notes, Class A-2-II | Ten Year United States Treasury Bill Rate | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Basis spread on variable rate | | 2.64% | | | | | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Debt interest rate (percent) | | | | | 7.37% | 7.29% | | | |
Letters of credit outstanding, amount | | | | | $ 3,400,000 | | | | |
Line of credit facility, current borrowing capacity | | | | | $ 221,600,000 | | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | Revolving Credit Facility | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Line of credit facility, maximum borrowing capacity | | | $ 325,000,000 | | | | | $ 325,000,000 | |
Proceeds from credit facility | | | $ 100,000,000 | | | | | | |
Number of renewal periods | renewalPeriod | | | 2 | | | | | | |
Renewal period term (in years) | | | 1 year | | | | | | |
Interest rate percentage after renewal date | | | | | 5% | | | | |
Debt, weighted average interest rate | | | | | 7.30% | | | | |
Debt issuance costs, gross | | | $ 6,300,000 | | | | | | |
Amortization of debt issuance costs | | | | | $ 300,000 | | | | |
Debt issuance costs, net | | | | | $ 5,600,000 | | | | |
Number of additional extensions | extensionTerm | | | | | 2 | | | | |
Additional extension (in years) | | | | | 1 year | | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Basis spread on variable rate | | | 2.50% | | | | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | Letter of Credit | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Basis spread on variable rate | | | 0.50% | | | | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | Letter of Credit | Federal Funds Rate | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Basis spread on variable rate | | | 0.50% | | | | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | Letter of Credit | Base Rate | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Basis spread on variable rate | | | 2% | | | | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Letters of credit outstanding, amount | | | | | | $ 3,500,000 | | | |
Line of credit facility, current borrowing capacity | | | | | | 221,500,000 | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | Revolving Credit Facility | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Line of credit facility, maximum borrowing capacity | | | | | $ 225,000,000 | | | | |
Line of credit facility, expired amount | | | | | | | | $ 225,000,000 | |
Proceeds from credit facility | | | | $ 220,000,000 | | | | | |
Repayments of long-term lines of credit | $ 220,000,000 | | | | | | | | |
Line of credit facility, amount outstanding | | | | | | | | | $ 0 |
Amortization of debt issuance costs | | | | | | 200,000 | | | |
Debt issuance costs, net | | | | | | 1,400,000 | | | |
Gain on extinguishment of debt | | | | | $ (1,200,000) | | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Basis spread on variable rate | | | | | 2.15% | | | | |
Line of credit facility, percentage of advances drawn | | | | | 60% | | | | |
Series 2022-1 Variable Funding Senior Secured Notes, Class A-1, variable interest rate of 7.37% and 7.29% at March 31, 2023 and December 31, 2022, respectively | Revolving Credit Facility | Commercial Paper Funding Rate Of Conduit Investor | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Basis spread on variable rate | | | | | 2.15% | | | | |
Line of credit facility, percentage of advances drawn | | | | | 40% | | | | |
2019 Class A-2 Notes | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Debt instrument, term | | 10 years | | | | | | | |
Additional interest on fixed rate | | 5% | | | | | | | |
Quarterly principal payment | | | | | $ 3,250,000 | | | | |
Covenant compliance, leverage ratio, maximum | Rate | | | | | 525% | | | | |
Ratio of indebtedness to net capital | Rate | | | | | 450% | | | | |
Debt issuance costs, gross | | | | | $ 12,900,000 | | | | |
Amortization of debt issuance costs | | | | | 900,000 | $ 500,000 | | | |
Unamortized debt issuance costs | | | | | 4,500,000 | | | | |
Gain on extinguishment of debt | | | | | 1,700,000 | | | | |
Extinguishment of debt | | | | | 67,900,000 | | | | |
Annual principal payment | | | | | $ 13,000,000 | | | | |
2019 Class A-2 Notes | Maximum | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | |
Ratio of indebtedness to net capital | Rate | | | | | 525% | | | | |