Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT (Other Long-term Debt) (Details)

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LONG-TERM DEBT (Other Long-term Debt) (Details) - Other Long Term Debt [Member]
$ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
note
Debt Instrument [Line Items]  
Capital lease obligations $ 14.2
Number of notes payable | note 34
Debt, Weighted Average Interest Rate 4.30%
Notes payable maturity period, maximum 4 years
Noncontrolling Interest Partners [Member]  
Debt Instrument [Line Items]  
Notes payable and other long-term debt $ 44.0
Subsidiaries [Member]  
Debt Instrument [Line Items]  
Notes payable and other long-term debt $ 17.8