Segment Information - EBITDA Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015 segment	Mar. 31, 2014
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Number of reportable segments	3us-gaap_NumberOfReportableSegments
Adjusted EBITDA	$ 100,290	$ 102,281
Interest income (expense), net	8	(44)
Income tax expense	(11,262)us-gaap_IncomeTaxExpenseBenefit	(15,969)us-gaap_IncomeTaxExpenseBenefit
Depreciation and amortization	(24,001)	(21,193)
(Loss) gain on sale of assets	(184)us-gaap_GainLossOnDispositionOfAssets1	241us-gaap_GainLossOnDispositionOfAssets1
Foreign currency gain (loss)	1,533	(65)
Stock-based compensation expense	(8,010)us-gaap_ShareBasedCompensation	(4,889)us-gaap_ShareBasedCompensation
Severance and other charges	(11,973)us-gaap_RestructuringCharges	0us-gaap_RestructuringCharges
Income from continuing operations	46,401	60,362
Operating segments \| International Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	52,285	51,028
Operating segments \| U.S. Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	44,893	41,879
Operating segments \| Tubular Sales Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	3,119	9,374
Operating segments \| Corporate and other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	$ (7)	$ 0

Adjusted Earnings before Interest, Taxes, Depreciation, and Amortization

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The net amount of nonoperating interest income (expense).

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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