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Goodwill and Intangible Assets - Estimated Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]  
2013 (remaining) $ 466
2014 1,768
2015 1,752
2016 1,570
2017 1,541
2018 1,532
Thereafter $ 4,687