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Commitments and Contingencies (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Trade accounts receivable		$ 3,095
Accrued Insurance, Current	$ 7,632	7,693
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	$ 4,366
Long-Term Purchase Commitment, Period	12 months
Trade accounts receivable		3,095
Contracts Receivable, Claims and Uncertain Amounts		10,451
Proceeds from Sale and Collection of Receivables	$ 5,140
Revenue, Remaining Performance Obligation, Amount	1,012,111
Estimated cost of completion of bonded projects	129,521
Loss Contingency, Receivable	1,893
Estimated cost of completion of bonded projects	129,521
Purchase Commitment, Remaining Minimum Amount Committed	6,029
Insurance Related [Member]
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	$ 4,166	$ 3,878

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Estimated cost of completion of bonded projects

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Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Amount of billed or unbilled claims or other similar items subject to uncertainty concerning their determination or ultimate realization under long-term contracts.

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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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Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of loss contingency liability.

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Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable.

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The cash inflow associated with the proceeds from sale and collection of receivables during the period.

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Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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