Additional Balance Sheet and Cash Flow Information - Schedule of Inventories, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Inventory
Raw materials and work in process	$ 294,480	$ 353,819	$ 299,296
Inventory at lower of FIFO cost or net realizable value	648,250	875,852	818,255
Excess of FIFO over LIFO cost	(136,064)	(130,059)	(136,391)
Total inventories, net	512,186	745,793	681,864
Deposits	554,500	550,600	549,000
Motorcycle finished goods
Inventory
Inventory, finished goods, net of inventory valuation adjustment	255,339	411,442	399,699
Parts and accessories and apparel
Inventory
Inventory, finished goods, net of inventory valuation adjustment	$ 98,431	$ 110,591	$ 119,260