Significant Accounting Policies - Schedule of Activity in the Restructuring Liability (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]      
Beginning Balance $ 1,701    $ 158
Accruals (97) 1,759 (158)
Payments (1,604) (58)  
Ending Balance    1,701   
Employee Separation Costs [Member]
     
Restructuring Cost and Reserve [Line Items]      
Beginning Balance 1,604    158
Accruals    1,662 (158)
Payments (1,604) (58)  
Ending Balance    1,604   
Facilities Related Charges [Member]
     
Restructuring Cost and Reserve [Line Items]      
Beginning Balance 97      
Accruals (97) 97   
Payments        
Ending Balance    $ 97