Finance Receivables - Changes in Allowance for Credit Losses on Finance Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss
Balance, beginning of period	$ 381,966	$ 358,711	$ 358,711
Provision for credit losses	61,010	52,364
Charge-offs	(81,368)	(68,008)
Recoveries	18,753	15,364
Balance, end of period	380,361	358,431	381,966
Retail
Financing Receivable, Allowance for Credit Loss
Balance, beginning of period	367,037	345,275	345,275
Provision for credit losses	60,989	50,969
Charge-offs	(81,368)	(68,008)	(263,915)
Recoveries	18,753	15,364
Balance, end of period	365,411	343,600	367,037
Wholesale
Financing Receivable, Allowance for Credit Loss
Balance, beginning of period	14,929	13,436	13,436
Provision for credit losses	21	1,395
Charge-offs	0	0
Recoveries	0	0
Balance, end of period	$ 14,950	$ 14,831	$ 14,929