Additional Balance Sheet and Cash Flow Information - Schedule of Inventories, Net (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
|---|---|---|---|
| Inventory | |||
| Raw materials and work in process | $ 282,968 | $ 338,744 | $ 294,480 |
| Inventory at lower of FIFO cost or net realizable value | 606,219 | 870,462 | 648,250 |
| Excess of FIFO over LIFO cost | (147,474) | (139,564) | (136,064) |
| Total inventories, net | 458,745 | 730,898 | 512,186 |
| Motorcycle finished goods | |||
| Inventory | |||
| Inventory, finished goods, net of inventory valuation adjustment | 221,156 | 434,044 | 255,339 |
| Parts and accessories and apparel | |||
| Inventory | |||
| Inventory, finished goods, net of inventory valuation adjustment | $ 102,095 | $ 97,674 | $ 98,431 |