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Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials and parts	$ 97,053	$ 151,531
Work in process	24,618	15,946
Finished goods	182,954	229,212
Gross inventories	304,625	396,689
Inventory reserve	(62,885)	(144,942)	$ (66,075)
Inventories	$ 241,740	$ 251,747

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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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