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v3.22.2.2

Short-Term Borrowings and Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) - Mortgage Facility [Member] - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 2.20% |
Mortgage Facility Payable to Flagship Bank [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 5.25% | 2.25%
Debt instrument basis percentage | 1.00% | 1.00%
Principal and interest payments with a balloon payment | $ 4.0 | $ 4.0
Additional extension for two one-year periods | Aug. 31, 2027 | Aug. 31, 2027
Mortgage Facility Payable to Flagship Bank [Member] | Interest Rate Prime [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument description of variable rate basis | prime minus 100 basis points with a floor of 2.00% | prime minus 100 basis points with a floor of 2.00%
Mortgage Facility Payable to Flagship Bank [Member] | Interest Rate Floor [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 2.00% | 2.00%
Mortgage Facility Payable to Seacoast National Bank [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 5.63% | 3.00%
Debt instrument basis percentage | 0.625% | 0.625%
Principal and interest payments with a balloon payment | $ 6.0 | $ 6.0
Additional extension for two one-year periods | Sep. 30, 2031 |
Mortgage Facility Payable to Seacoast National Bank [Member] | Interest Rate Prime [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument description of variable rate basis | greater of 3.00% or prime minus 62.5 basis points |
Mortgage facility payable to Hancock Whitney Bank [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 5.63% | 2.63%
Debt instrument basis percentage | 0.625% | 0.625%
Principal and interest payments with a balloon payment | $ 15.5 | $ 15.5
Additional extension for two one-year periods | Nov. 30, 2027 | Nov. 30, 2027
Percentage of outstanding borrowings hedged | 50.00% | 50.00%
Fixed interest rate | 3.20% | 3.20%
Mortgage facility payable to Hancock Whitney Bank [Member] | Interest Rate Prime [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument description of variable rate basis | prime minus 62.5 basis points with a floor of 2.25% | prime minus 62.5 basis points with a floor of 2.25%
Mortgage facility payable to Hancock Whitney Bank [Member] | Interest Rate Floor [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 2.25% | 2.25%
Revolving mortgage facility with FineMark National Bank & Trust [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 6.00% | 3.00%
Debt instrument basis percentage | 0.25% | 0.25%
Additional extension for two one-year periods | Oct. 31, 2027 |
Current available borrowings | $ 24.5 | $ 26.1
Revolving mortgage facility with FineMark National Bank & Trust [Member] | Base Rate [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument description of variable rate basis | prime minus 25 basis points with a floor of 3.00% |
Revolving mortgage facility with FineMark National Bank & Trust [Member] | Interest Rate Floor [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 3.00% | 3.00%

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