Fair Value of Financial Instruments - Primary Inputs of Monte Carlo Simulation Model (Detail) (Monte Carlo [Member], USD $)	9 Months Ended
Sep. 30, 2014
Monte Carlo [Member]
Fair Value Disclosures [Line Items]
Market value of the Company's common stock	$ 69.00
Estimated EBITDA volatility	42.50%

Weighted average expected volatility of stock price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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