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Equity-Based Incentives (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based incentive expense	$ 1,300	$ 700	$ 2,266	$ 969
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			533,994	1,042,473
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 22.41	$ 17.36	$ 22.41	$ 17.36
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period			159,867	193,407
Cover employee withholding taxes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased during period, shares	467		14,803	0

The number of shares newly issued during the reporting period under the plan.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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