RESTRUCUTRING CHARGES (Restructuring Reserve) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Reserve [Roll Forward]
Balance at December 31, 2014			$ 0
Restructuring charges	$ 877	$ 0	877	$ 0
Cash expenditures			(156)
Foreign currency translation adjustment			(2)
Balance at September 30, 2015	719		719
Employee termination costs
Restructuring Reserve [Roll Forward]
Restructuring charges	792		792
Other related costs
Restructuring Reserve [Roll Forward]
Restructuring charges	85		85
Operating segment | MMS
Restructuring Reserve [Roll Forward]
Balance at December 31, 2014			0
Restructuring charges	243		243
Cash expenditures			(61)
Foreign currency translation adjustment			0
Balance at September 30, 2015	182		182
Operating segment | MMS | Employee termination costs
Restructuring Reserve [Roll Forward]
Restructuring charges	243		243
Operating segment | MMS | Other related costs
Restructuring Reserve [Roll Forward]
Restructuring charges			0
Operating segment | ATA
Restructuring Reserve [Roll Forward]
Balance at December 31, 2014			0
Restructuring charges	634		634
Cash expenditures			(95)
Foreign currency translation adjustment			(2)
Balance at September 30, 2015	537		537
Operating segment | ATA | Employee termination costs
Restructuring Reserve [Roll Forward]
Restructuring charges	549		549
Operating segment | ATA | Other related costs
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 85		$ 85