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Goodwill and Intangible Assets - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Goodwill And Intangible Assets Disclosure [Abstract]      
Impairment charges $ 0 $ 0 $ 0
Aggregate amortization expense related to acquired intangibles $ 2,139 $ 1,036 $ 1,015