SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (Membership Services, Major customer one, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 item	Dec. 31, 2011	Dec. 31, 2010
Membership Services | Major customer one
Major Customers
Revenue from major customer(s)	$ 13.8	$ 14.6	$ 18.1
Number of third party major customers	1