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Goodwill and Intangibles - Schedule of Estimated Amortization Expense of Intangibles (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]    
Remaining in 2013 $ 679  
2014 832  
2015 801  
2016 477  
2017 332  
Thereafter 1,867  
Net Intangible Assets $ 4,988 $ 5,174