Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025
Financial Assets
Cash and cash equivalents	$ 20,406	$ 23,231	$ 51,651
Carrying Amount
Financial Assets
Cash and cash equivalents	20,406	23,231
Receivables	16,901	12,245
Carrying Amount \| Credit agreements
Financial Liabilities
Credit Agreements	215,600	231,584
Carrying Amount \| Senior unsecured bond due 2026
Financial Liabilities
Credit Agreements	299,886	299,200
Carrying Amount \| Senior unsecured bond due 2029
Financial Liabilities
Credit Agreements	396,460	395,775
Carrying Amount \| Senior unsecured bond due 2030
Financial Liabilities
Credit Agreements	493,848	493,046
Estimated Fair Value
Financial Assets
Cash and cash equivalents	20,406	23,231
Receivables	16,901	12,245
Estimated Fair Value \| Credit agreements
Financial Liabilities
Credit Agreements	215,600	231,584
Estimated Fair Value \| Senior unsecured bond due 2026
Financial Liabilities
Credit Agreements	300,000	300,330
Estimated Fair Value \| Senior unsecured bond due 2029
Financial Liabilities
Credit Agreements	420,000	421,200
Estimated Fair Value \| Senior unsecured bond due 2030
Financial Liabilities
Credit Agreements	525,000	525,560
Investments in receivables, net \| Carrying Amount
Financial Assets
Receivables	1,946,819	1,928,742
Investments in receivables, net \| Estimated Fair Value
Financial Assets
Receivables	2,216,877	2,156,926
Credit card receivables \| Carrying Amount
Financial Assets
Receivables	15,042	16,312
Credit card receivables \| Estimated Fair Value
Financial Assets
Receivables	$ 15,042	$ 16,312