Quarterly report pursuant to Section 13 or 15(d)

Dispositions - Narrative (Details)

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Dispositions - Narrative (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 01, 2017
USD ($)
segment
Aug. 31, 2017
USD ($)
segment
Jun. 30, 2017
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Loss on sale       $ (9,459) $ 0
Proceeds from sales of subsidiaries, net of cash       125,430 $ 0
Number of reportable segments | segment 1 2      
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 (4,900)        
Working capital and certain indemnification provisions adjustments (8,600)        
Net purchase price 172,700        
Asset Impairment Charges     $ (131,700)    
Fair value of net assets     $ 184,500    
Loss on sale       $ (9,400)  
Proceeds from sales of subsidiaries, net of cash 125,200        
Cash held for sale 22,200        
Cash price adjustments $ 2,600        
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