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Long-Term Debt and Bank Facility Borrowings - Company's Debt (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | ---
Debt Instrument [Line Items] |  |  |
Long-term debt, carrying Amount |  | $ 211,500 | $ 208,816
Current maturities of long-term debt, carrying Amount |  | 28,830 | 21,005
Long-term debt | [1] | 182,670 | 187,811
Long-term debt, fair value | [2] | 212,580 | 210,005
Current maturities of long-term debt, fair value | [2] | 28,830 | 21,005
Long-term portion of debt, fair value | [1],[2] | 183,750 | 189,000
Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility borrowings, carrying Amount |  | 7,830 | 5
Credit facility borrowings, fair value | [2] | 7,830 | 5
Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, carrying Amount | [1] | 203,670 | 208,811
Long-term debt, fair value | [1],[2] | $ 204,750 | $ 210,000
[1] | Carrying amounts are net of unamortized debt issuance costs of $1.1 million as of December 31, 2024 and $1.2 million as of September 30, 2024
[2] | The face amount of the Company’s variable rate long-term debt approximates fair value.

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