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LONG-TERM DEBT - Interest Rate and Fees (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2017
Receivables Based Credit Facility |
Debt Instrument [Line Items] |
Commitment fee rate | 0.75%
Receivables Based Credit Facility | Federal funds effective rate |
Debt Instrument [Line Items] |
Basis spread on variable rate | 0.50%
Receivables Based Credit Facility | Eurocurrency rate |
Debt Instrument [Line Items] |
Basis spread on variable rate | 1.00%
Revolving credit facility | Receivables Based Credit Facility | Eurocurrency rate |
Debt Instrument [Line Items] |
Stated interest rate | 4.75%
Revolving credit facility | Receivables Based Credit Facility | Base rate |
Debt Instrument [Line Items] |
Stated interest rate | 3.75%
Term Loan D | Senior Secured Credit Facility | Eurocurrency rate |
Debt Instrument [Line Items] |
Basis spread on variable rate | 6.75%
Term Loan D | Senior Secured Credit Facility | Base rate |
Debt Instrument [Line Items] |
Basis spread on variable rate | 5.75%
Term Loan E | Senior Secured Credit Facility | Eurocurrency rate |
Debt Instrument [Line Items] |
Basis spread on variable rate | 7.50%
Term Loan E | Senior Secured Credit Facility | Base rate |
Debt Instrument [Line Items] |
Basis spread on variable rate | 6.50%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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