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RESTRUCTURING - Schedule of Cumulative Amounts Incurred to Date and Expected (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2018
USD ($)
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date $ 228,190
Additional amount expected 9,633
Segments | United States [Member]  
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date 67,435
Additional amount expected 2,339
Segments | Canada [Member]  
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date 80,525
Additional amount expected 6,749
Segments | Other Segments [Member]  
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date 65,378
Additional amount expected 545
Unallocated expense  
Restructuring Cost and Reserve [Line Items]  
Cumulative amount incurred to date 14,852
Additional amount expected $ 0