RESTRUCUTRING CHARGES (Restructuring Reserve) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Reserve [Roll Forward]
Balance at December 31, 2014	$ 0
Restructuring charges	3,558	$ 0	$ 0
Cash expenditures	(2,121)
Other adjustments to accrual	(8)
Foreign currency translation adjustment	(20)
Balance at September 30, 2015	1,409	0
Employee termination costs
Restructuring Reserve [Roll Forward]
Restructuring charges	3,300
Other related costs
Restructuring Reserve [Roll Forward]
Restructuring charges	258
Operating segment | MMS
Restructuring Reserve [Roll Forward]
Balance at December 31, 2014	0
Restructuring charges	255
Cash expenditures	(85)
Other adjustments to accrual	(3)
Foreign currency translation adjustment	0
Balance at September 30, 2015	167	0
Operating segment | MMS | Employee termination costs
Restructuring Reserve [Roll Forward]
Restructuring charges	255
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	3,303
Cash expenditures	(2,036)
Other adjustments to accrual	(5)
Foreign currency translation adjustment	(20)
Balance at September 30, 2015	1,242	$ 0
Operating segment | ATA | Employee termination costs
Restructuring Reserve [Roll Forward]
Restructuring charges	3,045
Operating segment | ATA | Other related costs
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 258