Equity Incentive Plans (Details 1) (USD $)	6 Months Ended	12 Months Ended
	Jul. 01, 2012	Jan. 01, 2012
Summary of the activity of restricted stock
Restricted stock outstanding shares, Beginning Balance	442,000
Restricted stock outstanding Wtd. Avg. Grant Date Fair Value, Beginning Balance	$ 23.32
Granted shares	285,000
Granted Wtd. Avg. Grant Date Fair Value	$ 17.62
Vested shares	(108,000)	(94,530)
Vested Wtd. Avg. Grant Date Fair Value	$ 24.60
Forfeited/canceled shares	22,000
Forfeited/canceled Wtd. Avg. Grant Date Fair Value	$ 22.45
Restricted stock outstanding shares, Ending Balance	597,000	442,000
Restricted stock outstanding Wtd. Avg. Grant Date Fair Value, Ending Balance	$ 20.62	$ 23.32