DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($) item	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($) item
Interest Rate Swap
Derivative instruments and hedging activities
Gross notional amounts of cash flow hedges	$ 250.0	$ 250.0
Number of derivative agreements entered into | item	3
Number of derivative instruments held | item	3	3	3
Interest low Rate (as a percent)	2.623%	2.623%
Interest high Rate (as a percent)	2.675%	2.675%
Term of contract (in years)	10 years
Estimated additional amount to be reclassified as an increase to interest expense		$ 1.7
Interest Rate Swap | Cash Flow Hedging
Derivative instruments and hedging activities
Gross notional amounts of cash flow hedges	$ 209.5	$ 209.5	$ 172.0
Interest Rate Cap | Cash Flow Hedging
Derivative instruments and hedging activities
Gross notional amounts of cash flow hedges			$ 100.0