Quarterly report pursuant to Section 13 or 15(d)

Debt - Schedule of Debt (Details)

v3.22.1
Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Sep. 30, 2021
Debt Instrument [Line Items]    
Total debt principal $ 1,459,721 $ 1,523,531
Less: Unamortized debt-issuance costs and discounts (12,424) (13,839)
Total debt 1,447,297 1,509,692
Less: Current portion of long-term debt (59,911) (80,555)
Long-term debt 1,387,386 1,429,137
Secured Debt | Term Loan A, due 2026    
Debt Instrument [Line Items]    
Total debt principal 1,058,750 1,086,250
Secured Debt | Term Loan B, due 2028    
Debt Instrument [Line Items]    
Total debt principal 397,000 399,000
Subsidiary Loans    
Debt Instrument [Line Items]    
Total debt principal $ 3,971 $ 38,281