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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Components of Inventory
Inventories, net consisted of the following:
 December 31,
 20202019
 (Amounts in thousands)
Raw materials$321,600 $328,080 
Work in process210,174 192,993 
Finished goods221,532 218,408 
Less: Excess and obsolete reserve(86,078)(78,644)
Inventories, net$667,228 $660,837