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Fair Value of Financial Instruments - Financial Liability Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial liabilities measured at fair value on a recurring basis $ 16,873 $ 24,525
Level 3 [Member] | Private Placement Warrants [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial liabilities measured at fair value on a recurring basis 16,873 24,525
Level 3 [Member] | Contingent Consideration [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial liabilities measured at fair value on a recurring basis $ 8,000