Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Summary of Credit Losses by Product and Origination Year (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit losses, 2024			$ 6,112	$ 5,327
Credit losses, 2023			96,054	103,018
Credit losses, 2022			43,802	37,490
Credit losses, 2021			10,476	4,815
Credit losses, 2020			1,348	1,292
Credit losses, prior			439	227
Credit losses, Total Credit Losses	$ 50,425	$ 49,951	158,231	152,169
Large Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit losses, 2024			2,346	2,662
Credit losses, 2023			51,378	56,303
Credit losses, 2022			33,207	28,070
Credit losses, 2021			9,525	4,197
Credit losses, 2020			1,297	1,216
Credit losses, prior			408	218
Credit losses, Total Credit Losses	30,493	30,908	98,161	92,666
Small Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit losses, 2024			3,766	2,665
Credit losses, 2023			44,676	46,163
Credit losses, 2022			10,216	9,095
Credit losses, 2021			761	550
Credit losses, 2020			38	51
Credit losses, prior			27	6
Credit losses, Total Credit Losses	19,806	18,702	59,484	58,530
Retail Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit losses, 2023				552
Credit losses, 2022			379	325
Credit losses, 2021			190	68
Credit losses, 2020			13	25
Credit losses, prior			4	3
Credit losses, Total Credit Losses	$ 126	$ 341	$ 586	$ 973