BASIS OF PRESENTATION - Additional Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 PMRU Minimum	Jun. 30, 2014 PMRU Maximum	Jun. 30, 2014 Senior secured notes	Jun. 30, 2013 Other operating income
Debt Instrument [Line Items]
Debt arrangement					$ 675.5
Stated interest rate (percent)					10.75%
Business interruption insurance proceeds recorded in income						11.3
Cash proceeds from business interruption insurance	4.6
Finance income, recognition period			3 years	27 years
Liability for unrecognized tax benefits	$ 5.8	$ 0