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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Cash and Cash Equivalents |  |  |
Outstanding checks in excess of funds on deposits | $ 16.4 | $ 18.7 |
Restricted Cash | 4.9 |  |
CCF - cash on deposit | 4.9 |  |
Accounts Receivable |  |  |
Eligible accounts receivable assigned to CCF | 1.0 | 134.8 |
Allowance for doubtful accounts |  |  |
Balance at Beginning of year | 4.6 | 4.2 | $ 6.6
Expense (Recovery) | 0.8 | 1.0 | (0.3)
Write-offs and Other | (0.6) | (0.6) | (2.1)
Balance at End of Year | 4.8 | 4.6 | $ 4.2
Prepaid and Other Assets: |  |  |
Income tax receivables | 26.8 | 2.6 |
Prepaid insurance and insurance related receivables | 12.6 | 19.3 |
Prepaid fuel | 16.3 | 14.4 |
Other | 7.7 | 9.0 |
Total | 75.1 | 51.6 |
Carrying value |  |  |
Cash and Cash Equivalents |  |  |
Cash and cash equivalents | 19.6 | 19.8 |
Restricted Cash | 4.9 | 0.9 |
CCF - cash on deposit | 4.9 | 0.9 |
Variable rate debt | 235.0 | 205.0 |
Fixed rate debt | 621.4 | 652.1 |
Fair Value Measurement |  |  |
Cash and Cash Equivalents |  |  |
Cash and cash equivalents | 19.6 | 19.8 |
Restricted Cash | 4.9 | 0.9 |
CCF - cash on deposit | 4.9 | 0.9 |
Variable rate debt | 235.0 | 205.0 |
Fixed rate debt | 584.5 | 651.4 |
Quoted Prices in Active Markets (Level 1) |  |  |
Cash and Cash Equivalents |  |  |
Cash and cash equivalents | 19.6 | 19.8 |
Restricted Cash | 4.9 |  |
CCF - cash on deposit | 4.9 |  |
Significant Observable Inputs (Level 2) |  |  |
Cash and Cash Equivalents |  |  |
Restricted Cash |  | 0.9 |
CCF - cash on deposit |  | 0.9 |
Variable rate debt | 235.0 | 205.0 |
Fixed rate debt | $ 584.5 | $ 651.4 |

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