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Stockholders' Equity (Narrative) (Detail) (USD $)
6 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Stockholders Equity [Line Items]    
Shares of common stock purchased under share repurchase plan, shares 673,863 2,100,000
Shares of common stock purchased under share repurchase plan, value $ 24,645,000 $ 82,388,000