Stockholders' Equity - Summary of Number of PSUs Granted and Grant Date Fair Value (Detail)	9 Months Ended
Sep. 30, 2016 $ / shares shares
PSUs - Total Shareholder Return [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of units granted \| shares	124,755
Grant date fair value \| $ / shares	$ 57.14
PSUs – Adjusted EBITDA [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of units granted \| shares	165,391
Grant date fair value \| $ / shares	$ 43.10

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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.

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