Indebtedness - Schedule of Maturities of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Debt Disclosure [Abstract]
2022 (six months)	$ 8,750
2023	17,500
2024	17,500
2025	17,500
2026	17,500
2027	17,500
2028	192,499
Total long-term debt	$ 288,749	$ 48,118

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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