Fair Value Measurements - Changes in Fair Value of Recurring Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (Detail) $ in Thousands	12 Months Ended
Dec. 31, 2014 USD ($)
Fair Value Disclosures [Abstract]
Beginning balance	$ 81,500
Adjustments to fair value measurement impacting the Consolidated Statements of Stockholders' (Deficit) Equity and Redeemable Instruments	8,357
Adjustments to fair value measurement impacting the Consolidated Statements of Operations	(490)
Termination of Redemption Feature on common stock and put option	$ (89,367)

Adjustments to redeemable common stock fair value measurement redeemable instruments.

No definition available.

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- Definition

Fair value measurement with unobservable inputs reconciliations recurring basis liability temporary equity.

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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- Definition

Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

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- Definition

Redemption of temporary equity as the result of a triggering event associated with the temporary equity.

+ References

No definition available.

+ Details

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