Stock- Based Compensation - Segregated Disclosure of Options Outstanding (Parenthetical) (Detail)	12 Months Ended
Dec. 31, 2015 $ / shares
Less Than or Equal to $15.63 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower limit of exercise price range of options outstanding	$ 15.63
Greater Than $ 15.63 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Upper limit of exercise price range of options outstanding	$ 15.63

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.

No definition available.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ 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 (g)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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