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Segment Information - Revenue from External Customers (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Revenue from External Customer [Line Items]        
Total revenue $ 254,304 $ 272,937 $ 531,741 $ 537,429
Adjusted EBITDA 80,004 103,152 180,294 205,433
Operating segments | International Services        
Revenue from External Customer [Line Items]        
Total revenue 122,640 129,456 246,841 248,041
Adjusted EBITDA 55,311 48,873 107,596 99,902
Operating segments | U.S. Services        
Revenue from External Customer [Line Items]        
Total revenue 78,418 105,564 187,704 209,319
Adjusted EBITDA 16,684 44,968 61,577 86,846
Operating segments | Tubular Sales        
Revenue from External Customer [Line Items]        
Total revenue 53,246 37,917 97,196 80,069
Adjusted EBITDA 7,978 9,311 11,097 18,685
Inter-segment        
Revenue from External Customer [Line Items]        
Total revenue (17,417) (25,429) (37,599) (46,766)
Inter-segment | International Services        
Revenue from External Customer [Line Items]        
Total revenue 229 230 606 371
Inter-segment | U.S. Services        
Revenue from External Customer [Line Items]        
Total revenue 6,644 5,624 14,558 10,724
Inter-segment | Tubular Sales        
Revenue from External Customer [Line Items]        
Total revenue 10,544 19,575 22,435 35,671
Corporate and other        
Revenue from External Customer [Line Items]        
Adjusted EBITDA $ 31 $ 0 $ 24 $ 0