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Earnings Per Share (Details 1) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Stock options where the assumed proceeds exceed the average market price [Member]
Potentially dilutive securities earnings per share
Antidilutive securities excluded from computation of EPS	181	282	181	282
Restricted Stock Units [Member]
Potentially dilutive securities earnings per share
Antidilutive securities excluded from computation of EPS	1,203		1,203

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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