Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended					3 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012 Restructuring Plan 2011	Oct. 01, 2011 Restructuring Plan 2011	Sep. 29, 2012 Restructuring Plan 2011	Oct. 01, 2011 Restructuring Plan 2011	Sep. 29, 2012 Restructuring Plan 2011 Employee Severance	Sep. 29, 2012 Restructuring Plan 2011 Lease Loss Reserve	Sep. 29, 2012 Restructuring Plan 2011 Other Restructuring	Apr. 02, 2011 Restructuring Plan 2009
Restructuring Reserve [Roll Forward]
Balance at December 31, 2011							$ 1,569		$ 1,543	$ 26	$ 0
Charged to expense during nine months ended September 29, 2012							761		296	0	465
Paid or settled							(2,212)		(1,735)	(12)	(465)
Adjustments to reserve							(118)		(104)	(14)	0	(800)
Balance at September 29, 2012					0		0		0	0	0
Restructuring Charges [Abstract]
Severance and related costs	0	1,563	192	5,053
Lease loss reserve	0	(109)	(14)	(737)
Other	0	306	465	666
Total restructuring charges	$ 0	$ 1,760	$ 643	$ 4,982	$ 0	$ 1,400	$ 600	$ 4,000