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Inventories, net (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Pipe and connectors, net of allowance of $17,823 and $18,287, respectively $ 22,551 $ 21,779
Finished goods, net of allowance of $128 and $485, respectively 22,586 25,628
Work in progress 4,929 3,663
Raw materials, components and supplies 29,791 27,759
Total inventories, net 79,857 78,829
Pipe and Connectors    
Inventory [Line Items]    
Allowance 17,823 18,287
Finished Goods    
Inventory [Line Items]    
Allowance $ 128 $ 485