Long-Term Debt and Bank Facility Borrowings - Company's Debt (Detail) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Sep. 30, 2025 |
||||
|---|---|---|---|---|---|---|
| Debt Instrument [Line Items] | ||||||
| Long-term debt, carrying Amount | $ 172,569 | $ 188,118 | ||||
| Current maturities of long-term debt, carrying Amount | 21,000 | 21,000 | ||||
| Long-term debt | [1] | 151,569 | 167,118 | |||
| Long-term debt, fair value | [2] | 173,250 | 189,000 | |||
| Current maturities of long-term debt, fair value | [2] | 21,000 | 21,000 | |||
| Long-term portion of debt, fair value | [1],[2] | 152,250 | 168,000 | |||
| Revolving Credit Facility | ||||||
| Debt Instrument [Line Items] | ||||||
| Credit facility borrowings, carrying Amount | 0 | 0 | ||||
| Credit facility borrowings, fair value | [2] | 0 | 0 | |||
| Term Loan | ||||||
| Debt Instrument [Line Items] | ||||||
| Long-term debt, carrying Amount | [1] | 172,569 | 188,118 | |||
| Long-term debt, fair value | [1],[2] | $ 173,250 | $ 189,000 | |||
| ||||||
| X | ||||||||||
- Definition Lines of credit current carrying value. No definition available.
|
| X | ||||||||||
- Definition Lines of credit current fair value. No definition available.
|
| X | ||||||||||
- Definition Long-term debt, noncurrent, fair value. No definition available.
|
| X | ||||||||||
- Definition Long-term debt, fair value, current. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of current portion of long-term loans payable to bank due within one year or the operating cycle if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|