RESTRUCTURING COSTS AND ACCRUALS (Details) (USD $)	3 Months Ended								12 Months Ended				3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	24 Months Ended	12 Months Ended										24 Months Ended	12 Months Ended				12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	24 Months Ended	12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2010 2010 Restructuring Plan [Member]	Dec. 31, 2011 employee related [Member] Non-Acquisition-Related [Member] RestructuringPlan2011 [Member] position	Dec. 31, 2011 Employee Severance [Member] Non-Acquisition-Related [Member] RestructuringPlan2011 [Member]	Dec. 31, 2010 Employee Severance [Member] Non-Acquisition-Related [Member] 2010 Restructuring Plan [Member] position	Dec. 31, 2011 Employee Severance [Member] Non-Acquisition-Related [Member] 2010 Restructuring Plan [Member]	Dec. 31, 2008 Employee Severance [Member] Non-Acquisition-Related [Member] Restructuring Plan 2008 [Member] position	Dec. 31, 2010 Employee Severance [Member] Non-Acquisition-Related [Member] Restructuring Plan 2008 [Member] position	Dec. 31, 2011 Employee Severance [Member] Acquisition-Related [Member]	Dec. 31, 2010 Employee Severance [Member] Acquisition-Related [Member]	Dec. 31, 2009 Employee Severance [Member] Acquisition-Related [Member]	Dec. 31, 2010 Employee Severance [Member] Acquisition-Related [Member] 2010 Restructuring Plan [Member] employee	Dec. 31, 2011 Non-Acquisition-Related [Member] Employee Severance [Member]	Dec. 31, 2010 Non-Acquisition-Related [Member] Employee Severance [Member]	Dec. 31, 2009 Non-Acquisition-Related [Member] Employee Severance [Member]	Dec. 31, 2011 Non-Acquisition-Related [Member] Facilities-Related [Member]	Dec. 31, 2010 Non-Acquisition-Related [Member] Facilities-Related [Member]	Dec. 31, 2009 Non-Acquisition-Related [Member] Facilities-Related [Member]	Dec. 31, 2010 Non-Acquisition-Related [Member] Restructuring Plan 2008 [Member]	Dec. 31, 2011 Restructuring Charges Total [Member] Non-Acquisition-Related [Member] RestructuringPlan2011 [Member]	Dec. 31, 2011 Restructuring Charges Total [Member] Non-Acquisition-Related [Member] 2010 Restructuring Plan [Member]	Dec. 31, 2011 Restructuring Charges Total [Member] Non-Acquisition-Related [Member] Restructuring Plan 2008 [Member]	Dec. 31, 2011 Facilities-Related [Member]	Dec. 31, 2011 Facilities-Related [Member] Non-Acquisition-Related [Member] RestructuringPlan2011 [Member]	Dec. 31, 2010 Facilities-Related [Member] Non-Acquisition-Related [Member] 2010 Restructuring Plan [Member]	Dec. 31, 2011 Facilities-Related [Member] Non-Acquisition-Related [Member] 2010 Restructuring Plan [Member]	Dec. 31, 2008 Facilities-Related [Member] Non-Acquisition-Related [Member] Restructuring Plan 2008 [Member] facility	Dec. 31, 2011 Facilities-Related [Member] Non-Acquisition-Related [Member] Restructuring Plan 2008 [Member]	Dec. 31, 2010 Facilities-Related [Member] Non-Acquisition-Related [Member] Restructuring Plan 2008 [Member] facility	Dec. 31, 2011 Facilities-Related [Member] Acquisition-Related [Member]	Dec. 31, 2010 Facilities-Related [Member] Acquisition-Related [Member]	Dec. 31, 2009 Facilities-Related [Member] Acquisition-Related [Member]	Dec. 31, 2011 Facilities-Related [Member] Acquisition-Related [Member] 2010 Restructuring Plan [Member]	Dec. 31, 2010 Facilities-Related [Member] Acquisition-Related [Member] 2010 Restructuring Plan [Member] facility
Restructuring Cost and Reserve [Line Items]
Non-acquisition related restructuring charges									$ 8,747,000	$ 14,947,000	$ 27,719,000
acquisition related restructuring charges									111,000	1,755,000	(47,000)
Facility exit costs									0	3,748,000	0
Restructuring and other costs, net									8,858,000	20,450,000	27,672,000
Restructuring charges	8,530,000	2,707,000	(163,000)	(2,216,000)	14,918,000	185,000	4,007,000	1,340,000	8,858,000	20,450,000	26,873,000
Number of positions eliminated													190		145		500	320				24
Severance costs														8,900,000	11,700,000		20,400,000	14,800,000				1,800,000
Restructuring costs, closure of facilities																																		500,000	1,400,000	1,000,000	500,000		12,300,000
Non-cash restructuring charge - write down of inventory																																		100,000		100,000	1,900,000		2,700,000
Restructuring and related cost minimum expected cost																														9,000,000
Total restructuring charges expected to be recorded under the plan																														10,000,000
Restructuring charges related to the Plan																															10,000,000	55,000,000
Number of facilities closed																																					3		15					3
Restructuring accrual [Roll Forward]
Accrual balance at beginning of year				18,962,000				16,967,000	18,962,000	16,967,000	18,117,000								202,000	0	0		11,835,000	9,234,000	15,089,000	6,042,000	7,261,000	2,199,000												883,000	472,000	829,000
New restructuring charges - operating expenses									10,357,000	15,643,000	26,331,000								0	725,000	0		8,883,000	11,664,000	14,835,000	1,474,000	2,190,000	11,496,000	30,000,000											0	1,064,000	0
New restructuring charges - cost of revenues											799,000										0				0			799,000														0
Revisions of estimated liabilities									(1,499,000)	1,059,000	542,000					4,000,000			(30,000)	0	0		(3,991,000)	(405,000)	593,000	2,381,000	1,498,000	(4,000)								300,000		2,200,000	2,100,000	141,000	(34,000)	(47,000)	200,000
Accretion									230,000	220,000	277,000								0	0	0		0	0	0	230,000	210,000	239,000												0	10,000	38,000
Cash payments for employee-related charges									(13,070,000)	(9,122,000)	(20,726,000)								(178,000)	(531,000)	0		(12,892,000)	(8,591,000)	(20,726,000)	0	0	0												0	0	0
Cash payments for facilities, net of sublease income									(3,830,000)	(5,282,000)	(5,036,000)								0	0	0		0	0	0	(3,400,000)	(4,772,000)	(4,611,000)												(430,000)	(510,000)	(425,000)
Non-cash write-offs									(326,000)	(417,000)	(3,140,000)								0	0	0		0	0	0	(201,000)	(327,000)	(3,140,000)												(125,000)	(90,000)	0
Foreign exchange impact on ending balance									273,000	(106,000)	(197,000)								6,000	8,000	0		347,000	(67,000)	(557,000)	(81,000)	(18,000)	283,000												1,000	(29,000)	77,000
Accrual balance at end of period	11,097,000				18,962,000				11,097,000	18,962,000	16,967,000								0	202,000	0		4,182,000	11,835,000	9,234,000	6,445,000	6,042,000	7,261,000												470,000	883,000	472,000
Facilities-related accruals - current												3,700,000																					3,700,000
Facilities-related accruals - non-current	3,185,000				3,138,000				3,185,000	3,138,000																							3,200,000
Inventory Write-down																																							$ 800,000