Segment Information - Schedule of Adjusted EBITDA (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Total adjusted EBITDA	$ 509,308	$ 420,291	$ 936,882	$ 800,941
Depreciation, amortization and accretion expense	(252,386)	(213,719)	(471,399)	(415,872)
Stock-based compensation expense	(45,625)	(39,323)	(83,948)	(73,838)
Acquisition costs	(26,402)	(15,594)	(29,427)	(52,130)
Gains on asset sales	0	0	0	5,242
Income from continuing operations	184,895	151,655	352,108	264,343
Americas [Member]
Segment Reporting Information [Line Items]
Total adjusted EBITDA	258,151	195,028	456,770	379,488
EMEA [Member]
Segment Reporting Information [Line Items]
Total adjusted EBITDA	141,622	133,455	271,176	244,944
Asia-Pacific [Member]
Segment Reporting Information [Line Items]
Total adjusted EBITDA	$ 109,535	$ 91,808	$ 208,936	$ 176,509

Adjusted earnings before interest, taxes, depreciation and amortization/accretion.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

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

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No definition available.

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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.

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