Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v3.8.0.1
Commitments and Contingencies (Details)
Apr. 26, 2017
USD ($)
Apr. 04, 2017
year
$ / shares
Sep. 30, 2017
Apr. 12, 2017
USD ($)
Business Acquisition, Equity Interests Issued or Issuable [Line Items]        
Consideration per share | $ / shares   $ 32.50    
Liberty Ventures reference price (USD per share) | $ / shares   $ 43.65    
Years to redemption date | year   21    
Senior Notes Due 2021        
Business Acquisition, Equity Interests Issued or Issuable [Line Items]        
Aggregate principal amount of consent received | $       $ 312,418,000
Percent of total consent received       96.13%
Aggregate consent fee | $ $ 812,500      
Senior Notes Due 2025        
Business Acquisition, Equity Interests Issued or Issuable [Line Items]        
Aggregate principal amount of consent received | $       $ 443,538,000
Percent of total consent received       98.56%
Aggregate consent fee | $ $ 1,125,000      
Senior Notes | Senior Notes Due 2021        
Business Acquisition, Equity Interests Issued or Issuable [Line Items]        
Debt stated percentage 6.75%   6.75% 6.75%
Senior Notes | Senior Notes Due 2025        
Business Acquisition, Equity Interests Issued or Issuable [Line Items]        
Debt stated percentage 6.875%   6.875% 6.875%
Minimum        
Business Acquisition, Equity Interests Issued or Issuable [Line Items]        
Series A preferred shares dividend rate   5.00%    
Maximum        
Business Acquisition, Equity Interests Issued or Issuable [Line Items]        
Series A preferred shares dividend rate   7.00%    
Common Stock        
Business Acquisition, Equity Interests Issued or Issuable [Line Items]        
Ratio of new stock received   0.63    
Consideration per share | $ / shares   $ 27.50    
Preferred Stock        
Business Acquisition, Equity Interests Issued or Issuable [Line Items]        
Ratio of new stock received   0.20    
Consideration per share | $ / shares   $ 5.00