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DERIVATIVE INSTRUMENTS (Details) (Not designated as hedging instrument, USD $)
In Millions, unless otherwise specified
1 Months Ended 6 Months Ended
Dec. 31, 2011
Interest rate caps
Sep. 30, 2013
Interest rate caps
Sep. 30, 2013
Interest rate swap
Mar. 31, 2013
Interest rate swap
Derivative instruments        
Cost of interest rate cap $ 0.1      
Variable interest rate base   three-Month LIBOR three-Month LIBOR  
Notional value   160.0 65.0  
Gain (loss) on derivative instrument due to increase in value of the contract     0.2  
Fair value of derivative instrument     $ 0.4 $ 0.5