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Inventories, net (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory [Line Items]    
Pipe and connectors, net of allowance of $17,622 and $18,287, respectively $ 22,187 $ 21,779
Finished goods, net of allowance of $84 and $485, respectively 23,229 25,628
Work in progress 2,501 3,663
Raw materials, components and supplies 34,900 27,759
Total inventories, net 82,817 78,829
Pipe and Connectors    
Inventory [Line Items]    
Allowance 17,622 18,287
Finished Goods    
Inventory [Line Items]    
Allowance $ 84 $ 485