XML 59 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1
Inventories, net (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]      
Pipe and connectors, net of allowance of $20,466 and $20,064, respectively $ 24,574   $ 33,620
Finished goods, net of allowance of $1,490 and $1,520, respectively 16,823   14,541
Work in progress 7,478   9,206
Raw materials, components and supplies 20,542   19,053
Total inventories, net 69,417 $ 72,860 76,420
Pipe and Connectors      
Inventory [Line Items]      
Allowance 20,466   20,064
Finished Goods      
Inventory [Line Items]      
Allowance $ 1,490   $ 1,520