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Cost of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Component of Operating Other Cost and Expense [Abstract]
Cost of revenue	$ 372,848	$ 357,476
Personnel expenses
Component of Operating Other Cost and Expense [Abstract]
Cost of revenue	254,028	242,948
Operational expenses
Component of Operating Other Cost and Expense [Abstract]
Cost of revenue	107,542	102,797
Depreciation and amortization
Component of Operating Other Cost and Expense [Abstract]
Cost of revenue	$ 11,278	$ 11,731

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- Definition

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+ References

No definition available.

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- Definition

The aggregate cost of goods produced and sold and services rendered during the reporting period.

+ 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 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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