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Short-Term Borrowings and Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument [Line Items]
Long-term debt	$ 424,899
Less: current portion	(33,767)	$ (2,882)
Less: unamortized portion of debt issuance costs	(1,901)	(510)
Long-term debt, net current portion and unamortized debt issuance costs	389,231	45,301
Mortgage Facility [Member]
Debt Instrument [Line Items]
Long-term debt	424,899	48,693
Mortgage Facility [Member] | Mortgage Facility Payable to Flagship Bank [Member]
Debt Instrument [Line Items]
Long-term debt	5,907	6,403
Mortgage Facility [Member] | Mortgage Facility Payable to Seacoast National Bank [Member]
Debt Instrument [Line Items]
Long-term debt	16,735	17,098
Mortgage Facility [Member] | Mortgage facility payable to Hancock Whitney Bank [Member]
Debt Instrument [Line Items]
Long-term debt	23,279	$ 25,192
Term Loan [Member] | Term loan payable to M&T Bank [Member]
Debt Instrument [Line Items]
Long-term debt	377,500
Term Loan [Member] | Loan payable to TRANSPORT S.a.s di Taula Vittorio and C. [Member]
Debt Instrument [Line Items]
Long-term debt	$ 1,478

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