DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Interest rate swaps	Dec. 31, 2013 Interest rate swaps Cash Flow Hedges	Dec. 31, 2012 Interest rate swaps Cash Flow Hedges	Dec. 31, 2013 Interest rate cap Cash Flow Hedges	Dec. 31, 2012 Interest rate cap Cash Flow Hedges
Derivative instruments and hedging activities
Estimated additional amount to be reclassified as an increase to interest expense	$ 2.3
Gross notional amounts of cash flow hedges		$ 172.0	$ 172.0	$ 100.0	$ 100.0