Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Summary of gross carrying amounts and accumulated amortization of intangibles (Details)

v3.8.0.1
Goodwill and Other Intangible Assets - Summary of gross carrying amounts and accumulated amortization of intangibles (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Indefinite-lived intangible assets    
Disposal of Intangible Assets $ (57,932)  
Finite-lived intangible assets    
Gross Carrying Amount 115,266 $ 115,266
Accumulated Amortization (38,118) (25,034)
Disposal of Intangible Assets (57,739)  
Net Carrying Value 19,409 90,232
Total intangible assets, Gross Carrying Amount 115,459 115,459
Total intangible assets, Accumulated Amortization (38,118) (25,034)
Total intangible assets, Net Carrying Value 19,409 90,425
FCC license—broadcast radio    
Indefinite-lived intangible assets    
Indefinite-lived intangible assets 193 193
Disposal of Intangible Assets (193)  
Patents    
Finite-lived intangible assets    
Gross Carrying Amount 8,030 8,030
Accumulated Amortization (3,289) (2,556)
Disposal of Intangible Assets 0  
Net Carrying Value 4,741 5,474
Total intangible assets, Accumulated Amortization (3,289) (2,556)
Developed technology    
Finite-lived intangible assets    
Gross Carrying Amount 56,162 56,162
Accumulated Amortization (22,586) (13,599)
Disposal of Intangible Assets (19,235)  
Net Carrying Value 14,341 42,563
Total intangible assets, Accumulated Amortization (22,586) (13,599)
Customer relationships—clients    
Finite-lived intangible assets    
Gross Carrying Amount 37,399 37,399
Accumulated Amortization (7,449) (5,487)
Disposal of Intangible Assets (29,950)  
Net Carrying Value 0 31,912
Total intangible assets, Accumulated Amortization (7,449) (5,487)
Customer relationships—users    
Finite-lived intangible assets    
Gross Carrying Amount 1,940 1,940
Accumulated Amortization (1,732) (1,288)
Disposal of Intangible Assets (208)  
Net Carrying Value 0 652
Total intangible assets, Accumulated Amortization (1,732) (1,288)
Trade names    
Finite-lived intangible assets    
Gross Carrying Amount 11,735 11,735
Accumulated Amortization (3,062) (2,104)
Disposal of Intangible Assets (8,346)  
Net Carrying Value 327 9,631
Total intangible assets, Accumulated Amortization $ (3,062) $ (2,104)