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Debt (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Debt [Abstract] |  |  |
Interest expense | $ 1,702 | $ 1,282 | $ 1,130
Line Of Credit Facility [Line Items] |  |  |
Letters of Credit Outstanding, Amount | 6,493 |  |
Revolving Loan [Member] |  |  |
Line Of Credit Facility [Line Items] |  |  |
Excess Availability | $ 48,260 |  |
Line Of Credit Facility Interest Rate At Period End | 3.04% | 2.73% |
Line Of Credit Facility, Expiration Date | Aug. 09, 2021 |  |
Maximum Revolver Amount | $ 100,000 |  |
Line Of Credit Facility Covenant Terms | The Amended Credit Agreement also modified our financial covenants by, among other items, implementing a new covenant that requires the Company to maintain a minimum EBITDA (as defined in the Amended Credit Agreement) that will be tested quarterly on a trailing twelve month basis; increasing the minimum Liquidity (as defined in the Amended Credit Agreement) requirement applicable to the Company from 12.5% to 30% of the maximum revolver amount; raising the Company’s required Fixed Charge Coverage Ratio (as defined in the Amended Credit Agreement) (the “FCCR”) to 1.1:1.0 from 1.0:1.0; and requiring that the FCCR be tested quarterly regardless of the Company’s Liquidity levels. Terms of the Amended Credit Agreement The Amended Credit Agreement contains other customary affirmative, negative and financial covenants, as well as events of default. As of September 30, 2017, we were in compliance with the financial covenants under the Amended Credit Agreement, requiring that we maintain: • an FCCR, measured quarterly on a trailing four-quarter basis at the end of each quarter, of at least 1.1 to 1.0; • minimum Liquidity of at least thirty percent (30%) of the Maximum Revolver Amount (as defined in the Amended Credit Agreement), or $30,000; with, for purposes of this covenant, at least fifty percent (50%) of our Liquidity comprised of Excess Availability; |  |
Liquidity | $ 76,549 |  |
EBITDA | $ 38,227 |  |

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