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Inventories, net (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Pipe and connectors, net of allowance of $18,758 and $21,270, respectively	$ 26,049	$ 18,026
Finished goods, net of allowance of $868 and $1,354, respectively	29,420	22,608
Work in progress	4,529	8,285
Raw materials, components and supplies	26,819	20,463
Total inventories, net	86,817	69,382
Pipe and Connectors
Inventory [Line Items]
Allowance	18,758	21,270
Finished Goods
Inventory [Line Items]
Allowance	$ 868	$ 1,354

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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