Interest and Other Expense (Income), Net (Details) (USD $) In Thousands	3 Months Ended			9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Jul. 04, 2010	Oct. 02, 2011	Oct. 03, 2010
Other Income and Expenses [Abstract]
Interest income	$ (549)	$ (192)		$ (1,354)	$ (542)
Interest expense	4,449	4,185		12,578	11,937
Gain on step acquisition	0	0	(25,600)	0	(25,586)
Other expense, net	16	2,687		2,719	2,340
Total interest and other expense (income), net	$ 3,916	$ 6,680		$ 13,943	$ (11,851)