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Fair Value Measurements (Reconciliation of Level 3 Liabilities) (Detail) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
MIlestone Payment $ 1,247 $ 2,000    
Change in the estimated fair value of the contingent purchase price consideration   (926) (2,370) 109
Unobservable Inputs (Level 3) [Member]
        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning Balance Liabilities   7,142 6,351  
MIlestone Payment   (1,247) (1,579)  
Change in the estimated fair value of the contingent purchase price consideration   (926) (2,370)  
Ending Balance Liabilities   $ 6,821 $ 7,142