Quarterly report pursuant to Section 13 or 15(d)

Debt - Schedule of Debt (Details)

v3.21.2
Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Sep. 30, 2020
Debt Instrument [Line Items]    
Total debt principal $ 1,707,754 $ 28,895
Less unamortized debt-issuance costs and discounts (14,033) 0
Total debt 1,693,721 28,895
Less current portion (60,586) (10,878)
Long-term debt 1,633,135 18,017
Secured Debt | Five Year Term Loan    
Debt Instrument [Line Items]    
Total debt principal 1,100,000 0
Secured Debt | Seven Year Term Loan    
Debt Instrument [Line Items]    
Total debt principal 400,000 0
Line of Credit | Revolving Credit Facility | New Revolving Credit Facility    
Debt Instrument [Line Items]    
Total debt principal 200,000 0
Line of Credit | Revolving Credit Facility | Old Revolving Credit Facility    
Debt Instrument [Line Items]    
Total debt principal 0 0
Subsidiary Loans    
Debt Instrument [Line Items]    
Total debt principal $ 7,754 $ 28,895