Additional Balance Sheet and Cash Flow Information - Inventories, Net (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 31, 2019	Sep. 29, 2019
Inventory
Raw materials and work in process	$ 152,740	$ 235,433	$ 189,144
Inventory at lower of FIFO cost or net realizable value	378,801	659,997	547,737
Excess of FIFO over LIFO cost	(56,426)	(56,426)	(58,639)
Total inventories, net	322,375	603,571	489,098
Motorcycles
Inventory
Finished goods	125,930	280,306	206,324
Parts & Accessories and General Merchandise
Inventory
Finished goods	$ 100,131	$ 144,258	$ 152,269

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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