Contract Assets and Liabilities (Tables)

12 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Schedule of costs and estimated earnings compared to billings on uncompleted contracts

Costs and estimated earnings compared to billings on uncompleted contracts at September 30, 2023, 2022, and 2021 consisted of the following (in thousands):

	September 30,
	2023		2022		2021
Costs on uncompleted contracts	$	1,831,106	$	1,520,510	$	1,058,434
Estimated earnings to date on uncompleted contracts	194,760		146,459		110,430
	2,025,866		1,666,969		1,168,864
Billings to date on uncompleted contracts	(2,077,475)		(1,690,175)		(1,179,560)
Net billings in excess of costs and estimated earnings on uncompleted contracts	$	(51,609)	$	(23,206)	$	(10,696)

Significant changes to balances of costs and estimated earnings in excess of billings (contract asset) and billings in excess of costs and estimated earnings (contract liability) on uncompleted contracts from September 30, 2021 to September 30, 2023 are presented below (in thousands):

	Costs and Estimated Earnings in Excess of Billings on  Uncompleted Contracts		Billings in Excess of Costs and Estimated Earnings on  Uncompleted Contracts		Net Billings in Excess of Costs and Estimated Earnings on Uncompleted Contracts
September 30, 2021	$	23,023	$	(33,719)	$	(10,696)
Changes in revenue billed, contract price or cost estimates	6,248		(18,758)		(12,510)
September 30, 2022	29,271		(52,477)		(23,206)
Changes in revenue billed, contract price or cost estimates	(1,975)		(26,428)		(28,403)
September 30, 2023	$	27,296	$	(78,905)	$	(51,609)