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Estimated Amortization Expense of Goodwill and Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 23, 2013
Expected Amortization Expense [Line Items]  
2013 (remainder of the year) $ 3,122
2014 4,036
2015 4,013
2016 3,993
2017 $ 3,884