Annual report pursuant to Section 13 and 15(d)

Debt - Predecessor Senior Notes (Details)

v3.19.3.a.u2
Debt - Predecessor Senior Notes (Details) - USD ($)
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Jan. 22, 2014
Jul. 30, 2013
Predecessor 6.75% Senior Notes, Due July 2022          
Debt Instrument [Line Items]          
Fixed interest rate 6.75% 6.75%   6.75%  
Debt instrument, face amount       $ 360,000,000.0  
Debt issuance costs   $ 7,600,000      
Principal balance on Senior Notes     $ 360,000,000    
Predecessor 7.50% Senior Notes, Due August 2020          
Debt Instrument [Line Items]          
Fixed interest rate 7.50% 7.50%     7.50%
Debt instrument, face amount         $ 225,000,000.0
Debt issuance costs   $ 5,600,000      
Principal balance on Senior Notes     $ 225,000,000