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Restructuring - Schedule of Company's Restructuring Activity (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Restructuring and Related Activities [Abstract]    
Balance at December 31 $ 92us-gaap_RestructuringReserve  
Charged to expense 788us-gaap_RestructuringCharges 747us-gaap_RestructuringCharges
Payments (348)us-gaap_PaymentsForRestructuring  
Balance at March 31 $ 532us-gaap_RestructuringReserve