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Employee Benefits Plan - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Schedule of Employee Benefit Plans [Line Items] |  |  |
Maximum percentage of employee gross pay for defined contribution plan under Section 401(k) | 50.00% |  |
Employer matching contribution for defined contribution plan under Section 401(k) | 5.00% |  |
Total company matching contributions | $ 2.2 | $ 1.9 | $ 2.1

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- Definition Schedule of Employee Benefit Plans [Line Items] + References No definition available. + Details
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- Definition The increase in the fair value of plan assets from contributions made by the employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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