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Segment Information - Financial Information with Respect to Reportable Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Revenue from External Customer [Line Items] |  |  |  |
Revenue | $ 132,085 | $ 117,659 | $ 247,654 | $ 228,390
Operating income (loss) | (23,782) | (33,966) | (58,689) | (70,576)
Adjusted EBITDA | 10,953 | 3,564 | 8,794 | 5,100
Operating Segments | International Services |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue | 59,361 | 53,499 | 108,094 | 100,109
Operating income (loss) | (2,052) | (6,980) | (13,773) | (16,493)
Adjusted EBITDA | 13,458 | 9,022 | 16,046 | 14,308
Operating Segments | U.S. Services |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue | 35,136 | 29,905 | 67,743 | 60,871
Operating income (loss) | (19,920) | (24,292) | (41,900) | (47,639)
Adjusted EBITDA | (6,379) | (9,238) | (15,680) | (16,453)
Operating Segments | Tubular Sales |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue | 14,061 | 16,141 | 29,281 | 33,086
Operating income (loss) | (829) | 805 | 436 | 3,185
Adjusted EBITDA | 170 | 815 | 2,358 | 3,069
Operating Segments | Blackhawk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue | 23,527 | 18,114 | 42,536 | 34,324
Operating income (loss) | (981) | (3,499) | (3,452) | (9,629)
Adjusted EBITDA | 3,704 | 2,965 | 6,070 | 4,176
Eliminations |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue | (5,023) | (8,191) | (9,523) | (16,154)
Eliminations | International Services |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue | (56) | 12 | (79) | 15
Eliminations | U.S. Services |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue | 4,639 | 4,543 | 8,855 | 8,828
Eliminations | Tubular Sales |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue | 96 | 3,564 | 193 | 7,239
Eliminations | Blackhawk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue | $ 344 | $ 72 | $ 554 | $ 72

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