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Debt (Details) - USD ($)	Mar. 31, 2021	Sep. 30, 2020
Debt Disclosure [Abstract]
Long-term debt	$ 140,000	$ 217,000
Letters of Credit Outstanding, Amount	6,964,000
Line of Credit Facility, Remaining Borrowing Capacity	93,036,000
Loans Payable to Bank, Noncurrent	0	12,000
Other Long-term Debt, Noncurrent	140,000	$ 205,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 100,000,000

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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-Section S99
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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the operating cycle if longer, excluding current portion.

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Amount of long-term debt classified as other, payable after one year or the operating cycle, if longer.

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