Annual report pursuant to Section 13 and 15(d)

Business Combinations - Narrative (Details)

v3.8.0.1
Business Combinations - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 23, 2015
Oct. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]          
Aggregate purchase price     $ 0 $ 676 $ 269,566
Ticketfly          
Business Acquisition [Line Items]          
Purchase consideration   $ 335,300      
Shares issued in acquisition (in shares)   11,193,847      
Aggregate purchase price   $ 191,500      
Rdio          
Business Acquisition [Line Items]          
Additional purchase consideration $ 2,500        
Aggregate purchase price $ 77,500