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Goodwill and Intangible Assets (Detail) - (Table 3) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2012 (remaining nine months) $ 838
2013 3,351
2014 3,286
2015 3,101
2016 2,795
Thereafter 11,041
Total $ 24,412