Equity Incentive Plans (Details 4) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Jan. 01, 2012	Jan. 02, 2011
Status of non vested stock options
Options outstanding, Beginning Balance , Shares	605
Options granted, Shares	96
Options vested, shares	(184)
Options forfeited/canceled/expired, Shares	(73)
Forfeited	(41)
Options outstanding, Ending Balance , Shares	476	605
Option non vested, Wtd. Avg. grant date fair value, Beginning balance		$ 8.99
Granted, Wtd. Avg. grant date fair value	$ 6.81	$ 9.75	$ 6.73
Vested, Wtd. Avg. grant date fair value	$ 8.32
Forfeited, Wtd. Avg. grant date fair value	$ 8.96
Option non vested, Wtd. Avg. grant date fair value, Ending balance	$ 8.89		$ 8.99