Fair Value Measurements And Disclosures - Financial Instruments Not Required to be Carried at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and cash equivalents	$ 124,778	$ 104,409	$ 128,654
Financing Receivable, after Allowance for Credit Loss, Current	4,637,094	4,688,024
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-bearing deposits, carrying value	78,740	106,148
Cash, cash equivalents and restricted cash	61,519		$ 1,658
Reported Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and cash equivalents	124,778	104,409
Financing Receivable, after Allowance for Credit Loss, Current	4,637,094	4,688,024
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-bearing deposits, carrying value	78,740	106,148
Outstanding borrowings under credit facility	1,689,734	1,600,530
Term loans, carrying amount	457,611	460,111
Senior Notes, carrying amount	1,644,560	1,650,350
Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and cash equivalents, estimated fair value	124,778	104,409
Finance receivables, net, estimated fair value	4,355,224	4,394,028
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-bearing deposits, fair value	78,740	106,148
Revolving lines of credit, estimated fair value	1,689,734	1,600,530
Term loans, estimated fair value	457,611	460,111
Debt Instrument, Fair Value Disclosure	$ 1,609,165	$ 1,652,451

Fair value of certain loans acquired in transfer not accounted for as Debt Securities Outstanding Balance.

No definition available.

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- Definition

Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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

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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.

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The aggregate of all domestic and foreign interest-bearing deposit liabilities.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

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The fair value amount of long-term debt 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.

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Amortized cost, after allowance for credit loss, of financing receivable classified as current. Excludes net investment in lease.

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Amount of cash and cash equivalent restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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