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DERIVATIVE FINANCIAL INSTRUMENTS (Details) $ in Millions | Jun. 30, 2015 USD ($) derivative interest_rate_swap | Dec. 31, 2014 USD ($)
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Accumulated other comprehensive income - unrealized loss on valuation of swap agreements | $ (3.3) | $ (4.0)
Other Liabilities | Level 2 |  |
Derivatives, Fair Value [Line Items] |  |
Derivative financial instruments, liabilities | 4.0 | 4.6
Prepaid Expenses and Other Assets | Level 2 |  |
Derivatives, Fair Value [Line Items] |  |
Derivative financial instruments, assets | $ 0.3 | $ 0.2
Cash Flow Hedging | Variable-Rate Derivatives | Minimum |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, cap interest rate | 3.00% |
Cash Flow Hedging | Variable-Rate Derivatives | Maximum |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, cap interest rate | 4.25% |
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 | 14 |
Notional amount of interest rate cash flow hedge derivatives | $ 207.9 |
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives | Minimum |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, fixed interest rate | 1.40% |
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 | $ 139.0 |
Derivative, number of instruments held | derivative | 4 |

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