Additional Balance Sheet and Cash Flow Information - Schedule of Reconciliation of Net Cash Provided by Operating Activities (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Cash flows from operating activities:
Net income	$ 375,165	$ 105,745	$ 130,797	$ 115,967	$ 215,406	$ 232,233	$ 611,709	$ 563,605
Adjustments to reconcile Net income to Net cash provided by operating activities:
Depreciation and amortization	$ 44,210			$ 39,192			126,339	119,568
Amortization of deferred loan origination costs							43,871	54,461
Amortization of financing origination fees							9,773	10,363
Income related to long-term employee benefits							(41,287)	(40,076)
Employee benefit plan contributions and payments							(5,091)	(3,781)
Stock compensation expense							25,838	39,820
Net change in wholesale finance receivables related to sales							(183,006)	(211,800)
Provision for credit losses							(198,427)	175,017
Origination of finance receivables held for sale							(414,009)	0
Collections from finance receivables held for sale							16,916	0
Gain on sale of securitization beneficial interests							(26,958)	0
Deferred income taxes							92,122	(1,815)
Other, net							19,360	19,557
Changes in current assets and liabilities:
Accounts receivable, net							(46,415)	(36,529)
Finance receivables – accrued interest and other							11,279	2,325
Inventories, net							262,287	253,373
Accounts payable and accrued liabilities							75,039	(12,903)
Other current assets							37,563	(530)
Total adjustments							(194,806)	367,050
Net cash provided by operating activities							$ 416,903	$ 930,655