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ACQUISITIONS Narrative (Details)
$ in Thousands
3 Months Ended
Feb. 28, 2020
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
NumberAcquisitions
Business Acquisition [Line Items]      
Number of Businesses Acquired | NumberAcquisitions     1
Payments for (Proceeds from) Previous Acquisition   $ (5,340) $ 0
2020 acquisition      
Business Acquisition [Line Items]      
Total purchase price     60,211
Naval & Power      
Business Acquisition [Line Items]      
Total purchase price     $ 60,000
Naval & Power | Dyna-Flo Valve Services Ltd. (Dyna-Flo) [Member]      
Business Acquisition [Line Items]      
Effective Date of Acquisition Feb. 28, 2020