Annual report pursuant to Section 13 and 15(d)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Schedule of Deferred Revenue (Details)

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Schedule of Deferred Revenue (Details) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2018
Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Deferred Revenue (Current) $ 21,000,000 $ 22,400,000 $ 23,800,000 $ 16,200,000
Deferred Revenue (Long-Term) 38,500,000 51,400,000   $ 64,300,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Customer Supplemental Payments [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Deferred Revenue (Current)   1.4    
Other Current Liabilities [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Increase (Decrease) (2,800,000) 6,200,000    
Other Noncurrent Liabilities [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Increase (Decrease) $ (12,900,000) $ (12,900,000)