Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Pandora (Details)

v3.8.0.1
Related Party Transactions - Pandora (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Sep. 22, 2017
USD ($)
$ / shares
shares
Dec. 31, 2020
trading_day
$ / shares
Dec. 31, 2017
USD ($)
$ / shares
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jun. 09, 2022
Sep. 22, 2020
Schedule of Equity Method Investments [Line Items]              
Investment in convertible preferred stock     $ 612,465 $ 0 $ 0    
Preferred stock, par value (in dollars per share) | $ / shares     $ 0.001        
Pandora              
Schedule of Equity Method Investments [Line Items]              
Fair value of investment     $ 480,472 0      
Pandora | Level 2              
Schedule of Equity Method Investments [Line Items]              
Fair value of investment     480,472 $ 0      
Pandora | Series A Preferred Stock              
Schedule of Equity Method Investments [Line Items]              
Number of shares issued (in shares) | shares 480,000            
Investee | Pandora              
Schedule of Equity Method Investments [Line Items]              
Investment in convertible preferred stock $ 480,000   480,000        
Investment ownership percentage 19.00%            
Ownership percentage on an as-converted basis 16.00%            
Accrued dividends     10,849        
Unrealized gain on investment     472        
Investee | Pandora | Series A Preferred Stock              
Schedule of Equity Method Investments [Line Items]              
Preferred stock, par value (in dollars per share) | $ / shares $ 0.0001            
Price per share (in dollars per share) | $ / shares $ 10.50            
Common shares issued upon conversion (in shares) | shares 95.2381            
Preferred stock dividend rate, percentage 6.00%            
Liquidation preference     $ 490,849        
Percentage of liquidation preference 100.00%            
Investee | Pandora | Series A Preferred Stock | Forecast              
Schedule of Equity Method Investments [Line Items]              
Percentage of liquidation preference           100.00% 100.00%
Convertible preferred stock, stock trigger price (in dollars per share) | $ / shares   $ 18.375          
Convertible preferred stock, threshold trading days | trading_day   20          
Convertible preferred stock, threshold consecutive trading days | trading_day   30