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INVENTORIES (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Inventory, Net [Abstract]    
Raw material $ 189,296 $ 214,442
Work-in-process 91,356 74,536
Finished goods and component parts 143,773 143,016
Inventoried costs related to U.S. Government and other long-term contracts 68,666 54,195
Gross inventories 493,091 486,189
Less: Inventory reserves 55,471 55,776
Progress payments applied (7,534) (6,987)
Inventories, net $ 430,086 $ 423,426