Quarterly report pursuant to Section 13 or 15(d)

Contract Assets and Liabilities - Reconciliation of Net Billings in Excess of Costs and Estimated Earnings (Details)

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Contract Assets and Liabilities - Reconciliation of Net Billings in Excess of Costs and Estimated Earnings (Details) - USD ($)
$ in Thousands
 6 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts    
Contract asset, beginning balance $ 27,296 $ 29,271
Changes in revenue billed, contract price or cost estimates 8,825 (145)
Contract asset, ending balance 36,120 29,126
Billings in Excess of Costs and Estimated Earnings on Uncompleted Contracts    
Contract liability, beginning balance (78,905) (52,477)
Changes in revenue billed, contract price or cost estimates (24,547) (9,527)
Contract liability, ending balance (103,453) (62,004)
Net Billings in Excess of Costs and Estimated Earnings on Uncompleted Contracts    
Net billings in excess of costs, beginning balance (51,609) (23,206)
Changes in revenue billed, contract price or cost estimates (15,722) (9,672)
Net billings in excess of costs, Ending balance $ (67,332) $ (32,878)