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Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Summary of Contractual Delinquencies of Loans that were Modified to Borrowers Experiencing Financial Difficulty (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]
Modified finance receivables charged off	$ 71,161	$ 61,709
Small Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Modified finance receivables charged off	29,219	25,954
Small Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Modified finance receivables charged off	1,000	400
Large Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Modified finance receivables charged off	41,942	35,755
Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Modified finance receivables charged off	$ 3,300	$ 1,800

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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