Segment Information - Financial Information with Respect to Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Revenue from External Customer [Line Items]
Revenue	$ 115,569	$ 110,731
Operating income (loss)	(34,907)	(36,610)
Adjusted EBITDA	(2,159)	1,536
Operating Segments \| International Services
Revenue from External Customer [Line Items]
Revenue	48,733	46,610
Operating income (loss)	(11,721)	(9,513)
Adjusted EBITDA	2,588	5,286
Operating Segments \| U.S. Services
Revenue from External Customer [Line Items]
Revenue	32,607	30,966
Operating income (loss)	(21,980)	(23,347)
Adjusted EBITDA	(9,301)	(7,215)
Operating Segments \| Tubular Sales
Revenue from External Customer [Line Items]
Revenue	15,220	16,945
Operating income (loss)	1,265	2,380
Adjusted EBITDA	2,188	2,254
Operating Segments \| Blackhawk
Revenue from External Customer [Line Items]
Revenue	19,009	16,210
Operating income (loss)	(2,471)	(6,130)
Adjusted EBITDA	2,366	1,211
Eliminations
Revenue from External Customer [Line Items]
Revenue	(4,500)	(7,963)
Eliminations \| International Services
Revenue from External Customer [Line Items]
Revenue	(23)	3
Eliminations \| U.S. Services
Revenue from External Customer [Line Items]
Revenue	4,216	4,285
Eliminations \| Tubular Sales
Revenue from External Customer [Line Items]
Revenue	97	3,675
Eliminations \| Blackhawk
Revenue from External Customer [Line Items]
Revenue	$ 210	$ 0

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

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

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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=63488584&loc=d3e20235-122688

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