Commitments and Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Accrued Insurance, Current	$ 9,334	$ 7,726
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	5,606
Revenue, Remaining Performance Obligation, Amount	1,072,593
Estimated cost of completion of bonded projects	136,569
Estimated cost of completion of bonded projects	136,569
Purchase Commitment, Remaining Minimum Amount Committed	0
Insurance Related [Member]
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	$ 5,606	$ 4,166