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Revenue (Tables)

12 Months Ended

Sep. 30, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Contract Assets and Liabilities

Contract assets and liabilities as of September 30, 2025 and September 30, 2024 are summarized below (in thousands):

			September 30,
			2025						2024
Contract assets			$	136,679					$	102,827
Contract liabilities			(297,949)						(287,763)
Net contract liability			$	(161,270)					$	(184,936)

Schedule of Disaggregation of Revenue

The following tables present our disaggregated revenue by geographic destination and market sector for the years ended September 30, 2025, 2024 and 2023 (in thousands):

			2025						2024						2023
United States			$	880,222					$	846,526					$	557,934
Canada			157,191						106,521						84,090
Middle East and Africa			27,440						13,440						14,998
Europe			25,072						31,388						26,699
Asia/Pacific			9,283						6,850						6,188
Mexico, Central and South America			5,110						7,631						9,399
Total revenues by geographic destination			$	1,104,318					$	1,012,356					$	699,308

			2025						2024						2023
Oil and gas (excludes petrochemical)			$	406,565					$	417,170					$	273,117
Electric utility			278,988						186,547						158,400
Commercial and other industrial			178,222						149,899						103,966
Petrochemical			151,166						185,606						94,188
Light rail traction power			41,264						22,019						28,112
All others			48,113						51,115						41,525
Total revenues by market sector			$	1,104,318					$	1,012,356					$	699,308

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- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

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X

- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-5

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