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Long-Term Debt and Bank Facility Borrowings - Company's Debt (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Sep. 30, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |  |
Long-term debt, carrying Amount |  | $ 178,947 | $ 122,805
Current maturities of long-term debt, carrying Amount |  | 72,341 | 13,000
Long-term debt |  | 106,606 | 109,805
Long-term debt, fair value | [1] | 179,591 | 123,500
Current maturities of long-term debt, fair value | [1] | 72,341 | 13,000
Long-term portion of debt, fair value | [1] | 107,250 | 110,500
Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility borrowings, carrying Amount |  | 59,341 | 0
Credit facility borrowings, fair value | [1] | 59,341 | 0
Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, carrying Amount | [2] | 119,606 | 122,805
Long-term debt, fair value | [1],[2] | $ 120,250 | $ 123,500
[1] | The face amount of the Company’s variable rate long-term debt approximates fair value.
[2] | Carrying amounts are net of unamortized debt issuance costs of $0.6 million as of December 31, 2020 and $0.7 million as of September 30, 2020.

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- 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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