Equity Incentive Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jul. 01, 2012 Y	Jan. 01, 2012 Y
Summary of the activity of stock option awards
Options outstanding, Beginning Balance , Shares	1,601,000
Options outstanding, Beginning Balance, Wtd. Avg. Exercise Price	$ 19.44
Options outstanding, Beginning Balance, Wtd. Avg., Remaining Contractual Term	6.73
Options outstanding, Beginning Balance, Average Intrinsic Value	$ 2,778
Options granted, Shares	0	554,350
Options granted, Wtd. Avg. Exercise Price	$ 0.00
Options exercised, Shares	62,000
Options exercised, Wtd. Avg. Exercise Price	$ 6.41
Options forfeited/canceled/expired, Shares	51,000
Options forfeited/canceled/expired, Wtd. Avg. Exercise Price	$ 22.47
Options outstanding, Ending Balance , Shares	1,488,000	1,601,000
Options outstanding, Ending Balance, Wtd. Avg. Exercise Price	$ 19.88	$ 19.44
Options outstanding, Ending Balance, Wtd. Avg., Remaining Contractual Term	6.36	6.73
Options outstanding, Ending Balance, Average Intrinsic Value	5,228	2,778
Options exercisable at July 1, 2012, Shares	1,017,000
Options exercisable at July 1, 2012, Wtd. Avg. Exercise Price	$ 18.38
Options exercisable at July 1, 2012, Wtd. Avg. Remaining Contractual Term	5.53
Options exercisable at July 1, 2012, Aggregate Intrinsic Value	$ 4,828