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DERIVATIVE FINANCIAL INSTRUMENTS (Details) $ in Millions | Mar. 31, 2016 USD ($) interest_rate_swap derivative | Dec. 31, 2015 USD ($)
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Accumulated other comprehensive income - unrealized loss on valuation of swap agreements | $ 11.5 | $ 4.5
Other Liabilities | Level 2 |  |
Derivatives, Fair Value [Line Items] |  |
Derivative financial instruments, liabilities | $ 12.4 | 5.9
Prepaid Expenses and Other Assets | Level 2 |  |
Derivatives, Fair Value [Line Items] |  |
Derivative financial instruments, assets |  | $ 0.8
Cash Flow Hedging | Variable-Rate Derivatives | Minimum |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, cap interest rate | 4.00% |
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives |  |
Derivatives, Fair Value [Line Items] |  |
Number of interest rate swaps (in interest rate swaps) | interest_rate_swap | 16 |
Notional amount of interest rate cash flow hedge derivatives | $ 305.7 |
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives | Minimum |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, fixed interest rate | 1.30% |
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives | Maximum |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, fixed interest rate | 3.80% |
Interest Rate Swap | Cash Flow Hedging | Variable-Rate Derivatives |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount of interest rate cash flow hedge derivatives | $ 29.5 |
Derivative, number of instruments held (derivative) | derivative | 1 |

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