LEGAL PROCEEDINGS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2012 Employee Arbitration	Dec. 31, 2009 Employee Arbitration item	Jul. 29, 2011 Purported Software License Complaint	Jun. 30, 2012 Purported Software License Complaint Software item
LEGAL PROCEEDINGS
Number of former employees who filed the complaint		4
Amount paid on conclusion of matter included in other operating (income) expense	$ 0.1
Additional amount alleged to be paid per the plaintiff			7.0
Value of perpetual software licenses acquired				2.6
Number of installments to make payment for perpetual software licenses acquired in settlement				2
Amount of first installment for making payment for software licenses				$ 1.5
Amortization period of cost of licenses	3 years