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Summary of Earnings Before Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Jan. 01, 2011
Jan. 02, 2010
Schedule of Components of Income Before Income Tax Expense (Benefit) [Line Items]      
Domestic $ 125,730 $ 104,421 $ 96,788
Foreign 14,719 9,815 2,938
Total $ 140,449 $ 114,236 $ 99,726