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Long-Term Debt, Net (Tables)
 3 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Summary of Long-term Debt A summary of long-term debt, net as of December 31, 2021 and September 30, 2021 is as follows:
December 31,September 30,
Maturity20212021
Revolving lines of credit to banks under the Senior Secured Credit FacilityMay 9, 2024$159,506 $104,396 
1% Exchangeable Senior Notes due 2025
February 15, 2025100,970 99,808 
Debt issuance costs, net(3,346)(3,599)
Total long-term debt, net of issuance costs$257,130 $200,605