ADVERTISING COSTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
ADVERTISING COSTS
Capitalized direct-response advertising costs, net of accumulated amortization	$ 4.1		$ 5.5
Impairment related to capitalized direct-response advertising cost	0	0
Period of amortization of direct-response advertising costs over estimated period of benefit	2 years
Amortization of direct-response advertising costs	3.0	1.0
Other advertising expense	$ 2.3	$ 1.7