XML 99 R84.htm IDEA: XBRL DOCUMENT v3.20.2
Debt - Senior Notes (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 24, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Debt Instruments        
Gain (loss) on extinguishment of debt   $ (38) $ (951) $ (876)
Senior notes due Dec. 2025        
Debt Instruments        
Debt instrument repurchased, aggregate principal amount   $ 7,900    
Total tender offer price   98.70%    
Gain (loss) on extinguishment of debt   $ 100    
Interest rate (as a percent)   5.625%    
Senior secured second lien notes due 2025        
Debt Instruments        
Debt instrument, face amount $ 300,000      
Net proceeds from offering $ 295,500      
Interest rate (as a percent) 8.75%