Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Reconciliation of Uncertain Tax Benefits) (Details)

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INCOME TAXES (Reconciliation of Uncertain Tax Benefits) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Reconciliation of the beginning and ending amount of liabilities associated with uncertain tax benefits, excluding interest and penalties      
Unrecognized tax benefits, opening balance $ 2,956 $ 4,908 $ 5,825
Settlement of liability reclassified as income tax payable 0 0 0
Payments on liability 0 0 0
Tax positions taken in a prior period      
Gross increases 0 0 0
Gross decreases (467) (705) 0
Gross decreases      
Gross increases 92 716 1,182
Gross decreases 0 0 0
Lapse of applicable statute of limitations (591) (1,970) (2,121)
Currency translation adjustments (24)    
Currency translation adjustments   7 22
Unrecognized tax benefits, ending balance $ 1,966 $ 2,956 $ 4,908