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INVENTORY (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials and components $ 9,428 $ 10,715
Work in progress 21,875 21,618
Spare parts 6,584 5,743
Finished goods 743 1,193
Total inventory [1] $ 38,630 $ 39,269
[1] The total amount of Rotables included in the company inventory for the years ended December 31, 2017 and 2016 were $8,615 and $8,345, respectively.