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Debt (Scheduled maturities of long-term debt) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 30, 2021
Sep. 30, 2020
Debt Disclosure [Abstract]      
2022 (remaining) $ 4,250    
2023 8,500    
2024 8,500    
2025 8,500    
2026 8,500    
Thereafter 1,611,750    
Long-term Debt $ 1,650,000 $ 1,091,000 $ 293,250