Computation of Basic and Diluted Earnings Per Share (Detail) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Weighted Average Number of Shares Outstanding [Line Items]
Weighted average common shares outstanding - basic	99,047	98,333	98,856	98,190
Dilutive impact of stock options and restricted stock	2,118	1,732	1,929	1,635
Weighted average common shares outstanding - diluted	101,165	100,065	100,785	99,825
Stock options excluded from the calculation of diluted earnings per share because the exercise price was greater than the average market price of the common shares	443	1,776	2,010	2,001

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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+ Details

- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

+ References+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details