Segment Information - EBITDA Reconciliation (Details) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) segment	Sep. 30, 2014 USD ($)
Segment Reporting [Abstract]
Number of reportable segments \| segment			3
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	$ 73,344	$ 120,504	$ 253,638	$ 325,937
Interest income (expense), net	173	(13)	150	23
Income tax expense	(10,771)	(19,777)	(32,662)	(51,598)
Depreciation and amortization	(29,032)	(23,254)	(80,743)	(66,342)
(Loss) gain on sale of assets	1,392	(280)	521	(193)
Foreign currency gain (loss)	(5,329)	(526)	(6,563)	(526)
Stock-based compensation expense	(6,035)	(9,214)	(22,323)	(29,450)
Severance and other charges	(1,186)	0	(14,208)	0
Change in value of contingent consideration	1,532	0	1,532	0
Income from continuing operations	24,088	67,440	99,342	177,851
International Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Severance and other charges			(493)
U.S. Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Severance and other charges			(12,569)
Tubular Sales
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Severance and other charges			(1,146)
Operating segments \| International Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	39,157	65,359	146,752	165,260
Operating segments \| U.S. Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	18,190	45,796	79,767	132,643
Operating segments \| Tubular Sales
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	15,985	9,343	27,082	28,028
Corporate and other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	$ 12	$ 6	$ 37	$ 6

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