Segment Information - Financial Information with Respect to Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue from External Customer [Line Items]
Revenue	$ 108,083	$ 105,114	$ 336,473	$ 379,546
Operating loss	(35,080)	(48,932)	(105,656)	(102,492)
International Services
Revenue from External Customer [Line Items]
Revenue	53,742	51,028	153,851	191,440
U.S. Services
Revenue from External Customer [Line Items]
Revenue	29,065	34,057	89,936	119,955
Tubular Sales
Revenue from External Customer [Line Items]
Revenue	7,701	20,029	40,787	68,151
Blackhawk
Revenue from External Customer [Line Items]
Revenue	17,575	0	51,899	0
Eliminations
Revenue from External Customer [Line Items]
Revenue	(7,209)	(8,676)	(23,363)	(26,789)
Eliminations \| International Services
Revenue from External Customer [Line Items]
Revenue	3	(1)	18	45
Eliminations \| U.S. Services
Revenue from External Customer [Line Items]
Revenue	4,062	3,641	12,890	11,691
Eliminations \| Tubular Sales
Revenue from External Customer [Line Items]
Revenue	3,111	5,036	10,350	15,053
Eliminations \| Blackhawk
Revenue from External Customer [Line Items]
Revenue	33	0	105	0
Operating segments
Revenue from External Customer [Line Items]
Operating loss	(35,080)	(48,932)	(105,656)	(102,492)
Adjusted EBITDA	1,973	(1,298)	7,073	20,077
Operating segments \| International Services
Revenue from External Customer [Line Items]
Operating loss	(2,647)	(17,697)	(19,140)	(25,834)
Adjusted EBITDA	11,151	4,532	25,459	31,752
Operating segments \| U.S. Services
Revenue from External Customer [Line Items]
Operating loss	(25,453)	(30,415)	(73,092)	(74,722)
Adjusted EBITDA	(11,322)	(5,995)	(27,775)	(13,018)
Operating segments \| Tubular Sales
Revenue from External Customer [Line Items]
Operating loss	(3,967)	(820)	(782)	(1,936)
Adjusted EBITDA	(1,333)	165	1,736	1,343
Operating segments \| Blackhawk
Revenue from External Customer [Line Items]
Operating loss	(3,013)	0	(12,642)	0
Adjusted EBITDA	$ 3,477	0	$ 7,653	0
As previously reported \| Corporate, Non-Segment
Revenue from External Customer [Line Items]
Adjusted EBITDA		$ 159		$ 361

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The net result for the period of deducting operating expenses from operating revenues.

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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=63488584&loc=d3e20235-122688

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