Fair Value - Schedule of Fair Value and Carrying Value of Company Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Fair Value
Assets:
Finance receivables, net	$ 7,428,722	$ 7,342,319	$ 7,927,504
Liabilities:
Deposits, net	517,576	555,902	454,617
Fair Value \| Medium-term notes
Debt:
Long-term debt, fair value	3,837,976	3,127,710	3,276,959
Fair Value \| Senior notes
Debt:
Long-term debt, fair value	690,824	683,624	684,792
Fair Value \| Asset-backed U.S. commercial paper conduit facility \| Secured Debt
Debt:
Long-term debt, fair value	531,260	431,846	502,521
Fair Value \| Asset-backed Canadian commercial paper conduit facility \| Secured Debt
Debt:
Long-term debt, fair value	68,275	77,381	88,333
Fair Value \| Asset-backed securitization debt \| Secured Debt
Debt:
Long-term debt, fair value	1,668,698	1,955,006	1,640,573
Fair Value \| Unsecured commercial paper
Debt:
Short-term debt, fair value	498,500	640,204	938,719
Carrying Value
Assets:
Finance receivables, net	7,399,607	7,288,294	7,906,022
Liabilities:
Deposits, net	513,330	550,586	441,168
Carrying Value \| Medium-term notes
Debt:
Long-term debt, fair value	3,797,100	3,114,013	3,288,993
Carrying Value \| Senior notes
Debt:
Long-term debt, fair value	746,981	746,800	746,258
Carrying Value \| Asset-backed U.S. commercial paper conduit facility \| Secured Debt
Debt:
Long-term debt, fair value	531,260	431,846	502,521
Carrying Value \| Asset-backed Canadian commercial paper conduit facility \| Secured Debt
Debt:
Long-term debt, fair value	68,275	77,381	88,333
Carrying Value \| Asset-backed securitization debt \| Secured Debt
Debt:
Long-term debt, fair value	1,658,745	1,950,138	1,644,626
Carrying Value \| Unsecured commercial paper
Debt:
Short-term debt, fair value	$ 498,500	$ 640,204	$ 938,719

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

+ References

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- Definition

Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date.

+ References

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