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Short-Term Borrowings and Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($)
$ in Thousands
Mar. 31, 2023
Sep. 30, 2022
Debt Instrument [Line Items]    
Less: current portion $ (32,409) $ (2,882)
Less: unamortized portion of debt issuance costs (1,680) (510)
Long-term debt, net current portion and unamortized debt issuance costs 407,335 45,301
Mortgage Facility [Member]    
Debt Instrument [Line Items]    
Long-term debt 441,424 48,693
Mortgage Facility [Member] | Mortgage Facility Payable to Flagship Bank [Member]    
Debt Instrument [Line Items]    
Long-term debt 6,155 6,403
Mortgage Facility [Member] | Mortgage Facility Payable to Seacoast National Bank [Member]    
Debt Instrument [Line Items]    
Long-term debt 17,060 17,098
Mortgage Facility [Member] | Mortgage facility payable to Hancock Whitney Bank [Member]    
Debt Instrument [Line Items]    
Long-term debt 24,236 $ 25,192
Term Loan [Member] | Term loan payable to M&T Bank [Member]    
Debt Instrument [Line Items]    
Long-term debt 392,500  
Term Loan [Member] | Loan payable to TRANSPORT S.a.s di Taula Vittorio and C. [Member]    
Debt Instrument [Line Items]    
Long-term debt $ 1,473