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REVENUE RECOGNITION (Textual) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Revenue from Contract with Customer [Abstract]      
Percentage Net Sales Over Time 10.00%    
Customer Advances $ 17,023 $ 19,683 $ 19,683
Billings in Excess of Cost, Current 17,013 11,132  
Unbilled Contracts Receivable $ 25,032 $ 22,229