Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities Measured at Fair Value (Details)

v3.3.0.814
Assets and Liabilities Measured at Fair Value (Details)
$ in Thousands
 1 Months Ended 9 Months Ended
Jul. 31, 2015
USD ($)
Jun. 30, 2015
USD ($)
Apr. 30, 2015
USD ($)
Sep. 30, 2015
USD ($)
shares
Sep. 30, 2014
USD ($)
Mar. 27, 2015
USD ($)
$ / item
shares
Feb. 28, 2015
$ / item
shares
Dec. 31, 2014
USD ($)
$ / item
shares
Assets and Liabilities Measured at Fair Value                
Short-term marketable securities       $ 9,011       $ 9,001
Investments, at fair value       424,570       360,762
Payments from settlements of financial instruments       182,192 $ 68,019      
Revolving Credit Facility                
Assets and Liabilities Measured at Fair Value                
Line of Credit Facility, Maximum Borrowing Capacity           $ 234,000    
Time Warner                
Assets and Liabilities Measured at Fair Value                
Investments, at fair value       $ 424,202       359,615
Written call option | Time Warner                
Assets and Liabilities Measured at Fair Value                
Class of Warrant or Right, Outstanding | shares       0        
Cashless Collar                
Assets and Liabilities Measured at Fair Value                
Payments from settlements of financial instruments $ 67,100              
Cashless Collar | Time Warner                
Assets and Liabilities Measured at Fair Value                
Derivative share amount hedged | shares           1,700,000    
Cashless Collar | Put Option | Time Warner                
Assets and Liabilities Measured at Fair Value                
Derivative, Price Risk Option Strike Price | $ / item           136.80    
Cashless Collar | Call Option | Time Warner                
Assets and Liabilities Measured at Fair Value                
Derivative, Price Risk Option Strike Price | $ / item           161.62    
Total | Recurring                
Assets and Liabilities Measured at Fair Value                
Cash equivalents       $ 626,312       36,002
Short-term marketable securities       9,011       9,001
Total | Written call option | Recurring | Time Warner                
Assets and Liabilities Measured at Fair Value                
Derivative liabilities, at fair value               (75,356)
Available for sale securities | Total | Recurring                
Assets and Liabilities Measured at Fair Value                
Investments, at fair value       424,570       $ 360,762
Expiration Date February 2015 | Written call option | Time Warner                
Assets and Liabilities Measured at Fair Value                
Derivative share amount hedged | shares               625,000
Derivative, Price Risk Option Strike Price | $ / item               92.02
Expiration Date February 2016 [member] | Written call option | Time Warner                
Assets and Liabilities Measured at Fair Value                
Derivative share amount hedged | shares             625,000  
Derivative, Price Risk Option Strike Price | $ / item             100.39  
Payments from settlements of financial instruments   $ 48,300            
Expiration Date May 2015 | Written call option | Time Warner                
Assets and Liabilities Measured at Fair Value                
Derivative share amount hedged | shares               625,000
Derivative, Price Risk Option Strike Price | $ / item               90.84
Payments from settlements of financial instruments     $ 36,700          
Quoted prices in active markets for identical assets (Level 1) | Recurring                
Assets and Liabilities Measured at Fair Value                
Cash equivalents       626,312       $ 36,002
Short-term marketable securities       9,011       9,001
Quoted prices in active markets for identical assets (Level 1) | Available for sale securities | Recurring                
Assets and Liabilities Measured at Fair Value                
Investments, at fair value       $ 424,570       360,762
Level 2 | Written call option | Recurring | Time Warner                
Assets and Liabilities Measured at Fair Value                
Derivative liabilities, at fair value               $ (75,356)
Minimum                
Level 2 input                
Volatility       17.40%        
Interest rate       0.41%        
Dividend yield       0.00%        
Maximum                
Level 2 input                
Volatility       25.20%        
Interest rate       0.99%        
Dividend yield       0.24%