Employee Benefit Plans and Stock-based Compensation - Summary of Restricted Stock Units Outstanding (Detail) - Restricted Stock Units Outstanding [Member] shares in Thousands, $ in Thousands	6 Months Ended
Jun. 30, 2017 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Underlying Restricted Stock Units \| shares	2,893
Weighted Average Remaining Vesting Period (Years)	10 months 20 days
Aggregate Fair Value \| $	$ 15,190

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period And Expected To Vest Total Fair Value

No definition available.

+ Details

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Vested And Expected To Vest Outstanding Number

+ References

No definition available.

+ Details

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- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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.

+ References

No definition available.

+ Details

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