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Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Domestic Employees |  |  |
Employee Benefit Plan [Line Items] |  |  |
Employer contributions to plan | $ 10.9 | $ 9.7 | $ 9.2
Foreign Employees |  |  |
Employee Benefit Plan [Line Items] |  |  |
Employer contributions to plan | $ 6.1 | $ 6.0 | $ 5.3

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- Definition Employee Benefit Plan [Line Items] + References No definition available. + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Details
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- Details
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