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Cost of Revenue (Detail) - USD ($) $ in Thousands | 3 Months Ended
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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 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 + Details
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