GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2025	Mar. 28, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023	Feb. 10, 2025
Indefinite-lived Intangible Assets [Line Items]
Goodwill						$ 755,000
Goodwill impairment			$ 18,885,000	$ 0	$ 1,721,000
Impairment of definite-lived intangible assets	$ 37,510,000	$ 92,397,000	129,907,000
Accumulated amortization, amount eliminated due to impairment			77,927,000
Intangible asset amortization			$ 41,924,000	$ 55,511,000	$ 57,804,000
Intangible Assets, Amortization Period | Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Useful Life (Years)	3 years		3 years	7 years
Maximum | Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Useful Life (Years)	14 years		14 years
Minimum | Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Useful Life (Years)	6 years		6 years
Electrical
Indefinite-lived Intangible Assets [Line Items]
Accumulated impairment loss	$ 5,645,000		$ 5,645,000
Goodwill impairment			0
Safety & Infrastructure
Indefinite-lived Intangible Assets [Line Items]
Accumulated impairment loss	$ 61,885,000		61,885,000
Goodwill impairment			$ 18,885,000