Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Schedule of Unrecognized Tax Benefits) (Details)

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INCOME TAXES (Schedule of Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Balance at January 1 $ 15,117 $ 14,022 $ 12,619
Increase for current year positions 807 0 1,606
Increase for prior year positions 15,498 1,978 274
Decrease for prior year positions 0 (3) 0
Interest and penalties for prior years 2,745 546 525
Expiration of applicable statute of limitations (1,233) 0 0
Settlements for prior year positions (2,033) (1,188) (852)
Foreign exchange (271) (238) (150)
Balance at December 31 30,630 $ 15,117 $ 14,022
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 16,800    
Unrecognized Tax Benefits That Would Not Impact Effective Tax Rate $ 13,800