SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Accounts receivable wrote off	$ 1.7	$ 0.6
Bad debt expense	2.3	1.5
Unrecognized tax benefits	0.7		0.7
Unrecognized tax benefits that would impact the effective tax rate, if recognized	0.1
Accrued interest and penalties related to unrecognized tax	0		0
Tax settlement amount			0.8
Operating loss wrote-off	2.9
Valuation allowance to offset net operation losses	$ 2.7