Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Narrative) (Details)

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INCOME TAXES (Narrative) (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2018
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Examination [Line Items]          
Domestic loss before income taxes     $ 132,600 $ (1,100) $ 21,400
Foreign income (loss) before taxes     $ 123,200 47,200 27,800
Federal Statutory Income Tax Rate, Percent     35.00%    
United States tax reform rate change   $ (55,685) $ (55,685) 0 $ 0
Net deferred tax liability acquired in business combinations     9,000 $ 15,900  
Net operating loss carryforwards - United States federal   123,100 123,100    
Net operating loss carryforwards - state   63,500 63,500    
Net operating loss carryforwards - foreign   $ 279,400 279,400    
One-time transition liability for foreign subsidiaries     $ 25,800    
Minimum [Member]          
Income Tax Examination [Line Items]          
Operating loss carryforwards, expiration date     Dec. 31, 2025    
Major tax jurisdictions [Member] | Minimum [Member]          
Income Tax Examination [Line Items]          
Tax years remain open to examination     2009    
Major tax jurisdictions [Member] | Maximum [Member]          
Income Tax Examination [Line Items]          
Tax years remain open to examination     2017    
Subsequent Event [Member]          
Income Tax Examination [Line Items]          
Federal Statutory Income Tax Rate, Percent 21.00%