Subsequent Event - Additional Information (Detail) - shares		6 Months Ended
Jul. 13, 2015	Jun. 30, 2015
Subsequent Event [Line Items]
Stock options granted		3,096,000
Subsequent Event \| Restricted Stock Units (RSUs) \| President and Chief Executive Officer
Subsequent Event [Line Items]
Number of shares awarded	870,000
Subsequent Event \| Non Qualified Stock Options \| President and Chief Executive Officer
Subsequent Event [Line Items]
Stock options granted	870,000

Net number of non-option equity instruments granted to participants.

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)(1)(iv)(1)

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

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- Definition

Net number of share options (or share units) granted during the period.

+ References

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

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