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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Carrying value |  |
Fair value of financial instruments |  |
Cash and cash equivalents | $ 12.8 | $ 19.8
CCF - cash on deposit |  | 0.9
Variable rate debt | 295.0 | 205.0
Fixed rate debt | 637.5 | 652.1
Fair Value Measurement |  |
Fair value of financial instruments |  |
Cash and cash equivalents | 12.8 | 19.8
CCF - cash on deposit |  | 0.9
Variable rate debt | 295.0 | 205.0
Fixed rate debt | 616.3 | 651.4
Fair Value Measurement | Quoted Prices in Active Markets (Level 1) |  |
Fair value of financial instruments |  |
Cash and cash equivalents | 12.8 | 19.8
Fair Value Measurement | Significant Observable Inputs (Level 2) |  |
Fair value of financial instruments |  |
CCF - cash on deposit |  | 0.9
Variable rate debt | 295.0 | 205.0
Fixed rate debt | $ 616.3 | $ 651.4

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