Annual report pursuant to Section 13 and 15(d)

Dispositions - Narrative (Details)

v3.8.0.1
Dispositions - Narrative (Details)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 01, 2017
USD ($)
segment
Aug. 31, 2017
USD ($)
segment
Jun. 30, 2017
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
segment
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Loss on sale         $ (9,378) $ 0 $ 0
Proceeds from sales of subsidiaries, net of cash         $ 124,319 $ 0 $ 0
Number of reportable segments | segment 1 2     1    
Sold | Ticketfly              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Total purchase price $ 200,000            
Cash portion of purchase price 150,000            
Convertible subordinated promissory note 50,000            
Unamortized discount (13,800)            
Costs to sell (4,800)            
Working capital and certain indemnification provisions adjustments (7,500)            
Net purchase price 174,000            
Asset Impairment Charges     $ 131,700   $ 131,700    
Fair value of net assets     $ 184,500   184,500    
Loss on sale       $ (9,300)      
Transfers of cumulative translation adjustments, 1,100            
Proceeds from sales of subsidiaries, net of cash 124,100            
Less: Decrease in cash held for sale 22,200            
Cash price adjustments $ 3,700            
Sold | KXMZ              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Proceeds from sales of subsidiaries, net of cash   $ 200          
Sold | Ticketfly and KXMZ              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Total current assets         37,800    
Long-term assets         187,900    
Total liabilities         $ 43,400