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Company's Debt (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Sep. 30, 2018
--- | --- | ---
Debt Instrument [Line Items] |  |  |
Long-term debt, carrying Amount |  | $ 191,831 | $ 100,780
Current maturities of long-term debt, carrying Amount |  | 102,500 | 9,000
Long-term debt |  | 89,331 | 91,780
Long-term debt, fair value | [1] | 192,500 | 101,500
Current maturities of long-term debt, fair value | [1] | 102,500 | 9,000
Long-term portion of debt, fair value | [1] | 90,000 | 92,500
Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility borrowings, carrying Amount |  | 92,500 | 1,500
Credit facility borrowings, fair value | [1] | 92,500 | 1,500
Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, carrying Amount | [2] | 99,331 | 99,280
Long-term debt, fair value | [1],[2] | $ 100,000 | $ 100,000
[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 $0.7 million as of December 31, 2018 and September 30, 2018.

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