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Mandatorily Redeemable Preferred Securities (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Related Party Transaction [Line Items]        
Loss on extinguishment of debt $ 14,532 $ 213,239 $ 103,004 $ 274,836
Mandatorily Redeemable Preferred Stock | Koch        
Related Party Transaction [Line Items]        
Loss on extinguishment of debt     $ 213,000