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Stock-Based Compensation And Other Stock Plans (Employee Stock Purchase Plan) (Narrative) (Detail) (Employee Stock Purchase Plan [Member], USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 29, 2012 | Dec. 31, 2011 | Jan. 01, 2011
Employee Stock Purchase Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Issuance of common stock | 33,596 | 89,699 | 112,944
Shares reserved for issuance | 1,015,066 |  |
Employee contributions for purchase of common stock | $ 2.3 |  |
Compensation expense | $ 0.5 | $ 1.0 | $ 1.8

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