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INVENTORIES, NET
 9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
INVENTORIES, NET INVENTORIES, NET
Inventories are stated at the lower of cost, determined on either the first-in, first-out or average cost method, or net realizable value. Inventories, net of reserves, consist of the following components (in thousands):
September 30,
2021		December 31,
2020
Raw materials and components$172,133 $99,418 
Finished goods67,691 44,695 
Work in progress13,615 11,592 
Aftermarket parts5,126 6,567 
Used trailers1,070 1,478 
$259,635 $163,750