GOODWILL AND INTANGIBLE ASSETS - Definite lived intangible assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Definite lived intangible assets [Abstract]
Beginning Balance, Carrying Value, Gross	$ 255,717,000
(Decrease)/Increase, Carrying Value, Gross	2,271,000	[1]
Ending Balance, Carrying Value, Gross	257,988,000
Beginning Balance, Accumulated Amortization	(102,999,000)
(Increase)/Decrease, Accumulated Amortization	(23,881,000)	[2]
Ending Balance, Accumulated Amortization	(126,880,000)
Beginning Balance, Intangible Assets, Net	152,718,000
Ending Balance, Intangible Assets, Net	131,108,000
Increase in carrying value related to foreign currency translation	1,800,000
Decrease in accumulated amortization from foreign currency translation	(300,000)
Customer relationships [Member]
Definite lived intangible assets [Abstract]
Beginning Balance, Carrying Value, Gross	76,874,000
(Decrease)/Increase, Carrying Value, Gross	852,000	[1]
Ending Balance, Carrying Value, Gross	77,726,000
Beginning Balance, Accumulated Amortization	(14,346,000)
(Increase)/Decrease, Accumulated Amortization	(7,188,000)	[2]
Ending Balance, Accumulated Amortization	(21,534,000)
Beginning Balance, Intangible Assets, Net	62,528,000
Ending Balance, Intangible Assets, Net	56,192,000
Weighted Average Useful Life	11 years
Developed technologies [Member]
Definite lived intangible assets [Abstract]
Beginning Balance, Carrying Value, Gross	76,814,000
(Decrease)/Increase, Carrying Value, Gross	813,000	[1]
Ending Balance, Carrying Value, Gross	77,627,000
Beginning Balance, Accumulated Amortization	(18,489,000)
(Increase)/Decrease, Accumulated Amortization	(5,881,000)	[2]
Ending Balance, Accumulated Amortization	(24,370,000)
Beginning Balance, Intangible Assets, Net	58,325,000
Ending Balance, Intangible Assets, Net	53,257,000
Weighted Average Useful Life	10 years
Trademarks and tradenames [Member]
Definite lived intangible assets [Abstract]
Beginning Balance, Carrying Value, Gross	17,818,000
(Decrease)/Increase, Carrying Value, Gross	13,000	[1]
Ending Balance, Carrying Value, Gross	17,831,000
Beginning Balance, Accumulated Amortization	(3,009,000)
(Increase)/Decrease, Accumulated Amortization	(3,395,000)	[2]
Ending Balance, Accumulated Amortization	(6,404,000)
Beginning Balance, Intangible Assets, Net	14,809,000
Ending Balance, Intangible Assets, Net	11,427,000
Weighted Average Useful Life	5 years
Other contractual agreements [Member]
Definite lived intangible assets [Abstract]
Beginning Balance, Carrying Value, Gross	3,055,000
(Decrease)/Increase, Carrying Value, Gross	40,000	[1]
Ending Balance, Carrying Value, Gross	3,095,000
Beginning Balance, Accumulated Amortization	(785,000)
(Increase)/Decrease, Accumulated Amortization	(1,557,000)	[2]
Ending Balance, Accumulated Amortization	(2,342,000)
Beginning Balance, Intangible Assets, Net	2,270,000
Ending Balance, Intangible Assets, Net	753,000
Weighted Average Useful Life	2 years
Licenses [Member]
Definite lived intangible assets [Abstract]
Beginning Balance, Carrying Value, Gross	81,156,000
(Decrease)/Increase, Carrying Value, Gross	553,000	[1]
Ending Balance, Carrying Value, Gross	81,709,000
Beginning Balance, Accumulated Amortization	(66,370,000)
(Increase)/Decrease, Accumulated Amortization	(5,860,000)	[2]
Ending Balance, Accumulated Amortization	(72,230,000)
Beginning Balance, Intangible Assets, Net	14,786,000
Ending Balance, Intangible Assets, Net	$ 9,479,000
Weighted Average Useful Life	14 years

[1] Includes an increase in carrying value of $1.8 million related to foreign currency translation.

[2] The impact of foreign currency translation on accumulated amortization was a decrease of $0.3 million.