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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

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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