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GOODWILL & OTHER INTANGIBLE ASSETS - Narrative (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($) segment	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Goodwill [Line Items]
Number of operating segments | segment	2
Number of reportable segments | segment	2
Goodwill	$ 196,645	$ 196,650	$ 196,662	$ 188,441	$ 188,409
Transportation Solutions
Goodwill [Line Items]
Goodwill	120,501	120,504	120,506	120,506	120,486
Parts & Services
Goodwill [Line Items]
Goodwill	$ 76,144	$ 76,146	$ 76,156	$ 67,935	$ 67,923

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- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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