Additional Balance Sheet and Cash Flow Information - Inventories, Net (Details) - USD ($) $ in Thousands	Jun. 28, 2020	Dec. 31, 2019	Jun. 30, 2019
Inventory
Raw materials and work in process	$ 199,300	$ 235,433	$ 161,828
Inventory at lower of FIFO cost or net realizable value	485,765	659,997	529,249
Excess of FIFO over LIFO cost	(56,426)	(56,426)	(58,639)
Total inventories, net	429,339	603,571	470,610
Motorcycles
Inventory
Finished goods	180,895	280,306	218,069
Parts & accessories and general merchandise
Inventory
Finished goods	$ 105,570	$ 144,258	$ 149,352

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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