Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended					3 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012 Restructuring Plan 2011	Jul. 02, 2011 Restructuring Plan 2011	Jun. 30, 2012 Restructuring Plan 2011	Jul. 02, 2011 Restructuring Plan 2011	Jun. 30, 2012 Restructuring Plan 2011 Employee Severance	Jun. 30, 2012 Restructuring Plan 2011 Lease Loss Reserve	Jun. 30, 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 six months ended June 30, 2012							761		296	0	465
Paid or settled							(2,212)		(1,735)	(12)	(465)
Adjustments to reserve							(118)		(104)	(14)	0	(800)
Balance at June 30, 2012					0		0		0	0	0
Restructuring Charges [Abstract]
Severance and related costs	(3)	1,171	193	3,490
Lease loss reserve	0	0	(14)	(628)
Other	90	216	464	360
Total restructuring charges	$ 87	$ 1,387	$ 643	$ 3,222	$ 100	$ 1,400	$ 600	$ 4,000