Additional Balance Sheet and Cash Flow Information - Inventories, Net (Details) - USD ($) $ in Thousands	Sep. 26, 2021	Dec. 31, 2020	Sep. 27, 2020
Inventory
Raw materials and work in process	$ 279,699	$ 211,979	$ 152,740
Inventory at lower of FIFO cost or net realizable value	544,991	577,580	378,801
Excess of FIFO over LIFO cost	(69,677)	(54,083)	(56,426)
Total inventories, net	475,314	523,497	322,375
Certificates of Deposit
Inventory
Deposits	290,300	80,000	30,000
Motorcycles
Inventory
Finished goods	178,315	281,132	125,930
Parts & Accessories and General Merchandise
Inventory
Finished goods	$ 86,977	$ 84,469	$ 100,131

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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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 by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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