Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Details 4)

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INCOME TAXES (Details 4) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Unrecognized tax benefits      
Outstanding balance for liabilities related to unrecognized tax benefits, which if recognized, would affect the effective tax rate $ 4,600 $ 6,800  
Interest and penalties included in the outstanding balance for liabilities related to unrecognized tax benefits 1,700 1,800  
Increase (decrease) in interest and penalties (200) 100  
Increase in liability for unrecognized tax benefits 900 1,400 $ 1,600
Interest expense and penalties included in increase in liability for unrecognized tax benefits 100 300 300
Benefit related to the lapse of applicable statute of limitations 2,300 2,500 100
Reconciliation of the beginning and ending amount of liabilities associated with uncertain tax benefits, excluding interest and penalties      
Unrecognized tax benefits, opening balance 4,908 5,825 4,950
Settlement of liability reclassified as income tax payable 0 0 (104)
Payments on liability 0 0 0
Tax positions taken in a prior period      
Gross increases 0 0 0
Gross decreases (705) 0 (47)
Tax positions taken in the current period      
Gross increases 716 1,182 1,252
Gross decreases 0 0 0
Lapse of applicable statute of limitations (1,970) (2,121) (69)
Currency translation adjustments, increase 7 22  
Currency translation adjustments, decrease     (157)
Unrecognized tax benefits, ending balance $ 2,956 $ 4,908 $ 5,825