Equity Incentive Plans (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 01, 2012 Y
Summary of the activity of stock option awards
Options outstanding, Beginning Balance , Shares	1,601
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
Options granted, Wtd. Avg. Exercise Price	$ 0.00
Options exercised, Shares	(44)
Options exercised, Wtd. Avg. Exercise Price	$ 5.26
Options forfeited/canceled/expired, Shares	(25)
Options forfeited/canceled/expired, Wtd. Avg. Exercise Price	$ 22.70
Options outstanding, Ending Balance , Shares	1,532
Options outstanding, Ending Balance, Wtd. Avg. Exercise Price	$ 19.80
Options outstanding, Ending Balance, Wtd. Avg., Remaining Contractual Term	6.57
Options outstanding, Ending Balance, Average Intrinsic Value	3,150
Options exercisable at October 2, 2011, Shares	1,040
Options exercisable at October 2, 2011, Wtd. Avg. Exercise Price	$ 18.20
Options exercisable at October 2, 2011, Wtd. Avg. Remaining Contractual Term	5.70
Options exercisable at October 2, 2011, Aggregate Intrinsic Value	$ 3,070