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Debt - Summary Of Company's securitizations (Details) - USD ($) $ in Thousands		1 Months Ended
		Mar. 31, 2025	Nov. 30, 2024	Jun. 30, 2024	Feb. 28, 2022	Oct. 31, 2021	Jul. 31, 2021	Feb. 28, 2021	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Line of Credit Facility [Line Items]
Debt Balance									$ 1,581,992	$ 1,478,336
Restricted Cash Reserves									104,459	$ 131,684	$ 115,576
RMIT 2021-1
Line of Credit Facility [Line Items]
Issue Date	[1]							2021-02
Issue Amount	[1]							$ 248,700
Debt Balance	[1]								37,861
Restricted Cash Reserves	[1]								$ 2,604
Effective interest rate	[1]								4.20%
Revolving Period End Date	[1]								2024-02
Maturity Date	[1]								2031-03
RMIT 2021-2
Line of Credit Facility [Line Items]
Issue Date							2021-07
Issue Amount							$ 200,000
Debt Balance									$ 200,192
Restricted Cash Reserves									$ 2,083
Effective interest rate									2.30%
Revolving Period End Date									2026-07
Maturity Date									2033-08
RMIT 2021-3
Line of Credit Facility [Line Items]
Issue Date						2021-10
Issue Amount						$ 125,000
Debt Balance									$ 125,202
Restricted Cash Reserves									$ 1,471
Effective interest rate									3.90%
Revolving Period End Date									2026-09
Maturity Date									2033-10
RMIT 2022-1
Line of Credit Facility [Line Items]
Issue Date					2022-02
Issue Amount					$ 250,000
Debt Balance									$ 132,416
Restricted Cash Reserves									$ 2,646
Effective interest rate									4.10%
Revolving Period End Date									2025-02
Maturity Date									2032-03
RMIT 2024-1
Line of Credit Facility [Line Items]
Issue Date				2024-06
Issue Amount				$ 187,305
Debt Balance									$ 187,788
Restricted Cash Reserves									$ 1,078
Effective interest rate									6.20%
Revolving Period End Date									2027-05
Maturity Date									2036-07
RMIT 2024-2
Line of Credit Facility [Line Items]
Issue Date			2024-11
Issue Amount			$ 250,000
Debt Balance									$ 250,557
Restricted Cash Reserves									$ 1,418
Effective interest rate									5.30%
Revolving Period End Date									2026-11
Maturity Date									2033-12
RMIT 2025-1
Line of Credit Facility [Line Items]
Issue Date		2025-03
Issue Amount		$ 265,000
Debt Balance									$ 265,585
Restricted Cash Reserves									$ 1,489
Effective interest rate									5.30%
Revolving Period End Date									2027-03
Maturity Date									2034-04
Securitizations
Line of Credit Facility [Line Items]
Issue Amount		$ 1,526,005
Debt Balance									$ 1,199,601
Restricted Cash Reserves									$ 12,789
[1] See Note 14, “Subsequent Events,” for information regarding the repayment and termination of the RMIT 2021-1 securitization following the end of the fiscal quarter.

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