RESTRUCTURING AND OTHER CHARGES - Restructuring Accrual (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Restructuring Reserve [Roll Forward]
Restructuring Reserve - Beginning Balance	$ 3,207		$ 3,605
Restructuring charges	404	831	2,662	1,551
Payments	(2,722)		(5,355)
Foreign currency changes	(23)		(46)
Restructuring Reserve - Ending Balance	866		866
Employee Severance Costs
Restructuring Reserve [Roll Forward]
Restructuring Reserve - Beginning Balance	1,448		2,005
Restructuring charges	349		2,319
Payments	(1,696)		(4,205)
Foreign currency changes	3		(15)
Restructuring Reserve - Ending Balance	104		104
Contract Termination Costs
Restructuring Reserve [Roll Forward]
Restructuring Reserve - Beginning Balance	1,574		1,600
Restructuring charges	0		0
Payments	(842)		(862)
Foreign currency changes	(2)		(8)
Restructuring Reserve - Ending Balance	730		730
Other Costs
Restructuring Reserve [Roll Forward]
Restructuring Reserve - Beginning Balance	185		0
Restructuring charges	55		343
Payments	(184)		(288)
Foreign currency changes	(24)		(23)
Restructuring Reserve - Ending Balance	$ 32		$ 32