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ACQUISITIONS AND DIVESTITURES - Pro Well Acquisition (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Sep. 30, 2019
Nov. 20, 2018
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Less: identified assets acquired and liabilities assumed            
Goodwill         $ 266,934 $ 273,801
Well Chemical Services Acquisition            
Consideration transferred            
Cash paid       $ 10,000    
Total consideration transferred       10,000    
Less: identified assets acquired and liabilities assumed            
Inventory       5,221    
Property and equipment       4,473    
Intangible assets       476    
Current liabilities       (170)    
Total identifiable net assets acquired       10,000    
Fair value allocated to net assets acquired       10,000    
Initial payment $ 10,000          
Pro Well Acquisition            
Consideration transferred            
Cash paid       11,754    
Total consideration transferred     $ 11,800 11,754    
Less: identified assets acquired and liabilities assumed            
Working capital       1,051    
Property and equipment       6,588    
Intangible assets       3,000    
Total identifiable net assets acquired       10,639    
Fair value allocated to net assets acquired       11,754    
Goodwill   $ 1,100   $ 1,115    
Initial payment   $ 12,400