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REDEEMABLE NONCONTROLLING INTEREST (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Feb. 08, 2016
Oct. 04, 2013
Noncontrolling Interest [Line Items]            
Payments to Acquire Additional Interest in Subsidiaries $ 25,000          
Noncontrolling Interest, Ownership Percentage by Parent         43.00% 30.00%
Noncontrolling Interest, Period Increase (Decrease) 12,000          
Redeemable noncontrolling interest   $ 113,193 $ 104,809 $ 77,174    
Reclassification as a result of ownership change     12,039      
Income attributable to redeemable noncontrolling interest   84 2,196 (7,014)    
Currency translation   1,907 3,844 (4,672)    
Redemption value adjustment   6,393 9,556 17,668    
Accumulated other comprehensive income (loss) [Member]            
Noncontrolling Interest [Line Items]            
Noncontrolling Interest, Period Increase (Decrease) (3,500)          
Additional paid-in capital [Member]            
Noncontrolling Interest [Line Items]            
Noncontrolling Interest, Period Increase (Decrease) $ (8,500)          
Redemption value adjustment   $ 6,393 $ 9,556 $ 17,668