General form of registration statement for all companies including face-amount certificate companies

Long-Term Debt - Schedule of Long Term Debt (Details)

v3.19.3.a.u2
Long-Term Debt - Schedule of Long Term Debt (Details) - USD ($)
12 Months Ended
Aug. 31, 2019
Dec. 31, 2018
Sep. 30, 2019
Dec. 31, 2017
Sep. 30, 2016
Feb. 29, 2016
Debt Instrument [Line Items]            
Total debt carrying value   $ 1,816,450,000 $ 994,000,000 $ 1,718,297,000    
Less current portion of long-term debt   (1,816,450,000) (8,225,000) (11,000,000)    
Long-term debt   0 $ 985,775,000 1,707,297,000    
Predecessor Senior Notes | Senior Notes 9.125 Percent Due 2020            
Debt Instrument [Line Items]            
Total debt carrying value   $ 585,000,000   580,026,000    
Debt interest rate 9.125% 9.125%        
Effective interest rate   9.10%        
Ascent Intercompany Loan | Promissory Note Due October 2020            
Debt Instrument [Line Items]            
Total debt carrying value   $ 12,000,000   12,000,000   $ 12,000,000
Effective interest rate   12.50%        
Term Loan | Term Loan Due September 2022            
Debt Instrument [Line Items]            
Total debt carrying value   $ 1,075,250,000   1,059,598,000    
Effective interest rate   8.60%        
Term Loan | Term Loan Due September 2022 | LIBOR            
Debt Instrument [Line Items]            
Variable interest rate base floor 5.50% 5.50%        
Floor on variable debt 1.00% 1.00%        
Revolving Credit Facility | Revolving Credit Facility Due 2021            
Debt Instrument [Line Items]            
Total debt carrying value   $ 144,200,000   $ 66,673,000    
Effective interest rate   4.80%        
Variable interest rate base floor   4.00%        
Borrowing capacity   $ 295,000,000     $ 295,000,000  
Revolving Credit Facility | Revolving Credit Facility Due 2021 | LIBOR            
Debt Instrument [Line Items]            
Variable interest rate base floor   4.00%        
Floor on variable debt   1.00%