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GOODWILL & OTHER INTANGIBLE ASSETS - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Sep. 30, 2021 segment	Mar. 31, 2022 USD ($) segment	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Goodwill [Line Items]
Number of operating segments \| segment	2	2
Number of segments \| segment	2	2
Goodwill		$ 188,438		$ 188,443	$ 199,560
Impact of divestiture on goodwill				11,101
Transportation Solutions
Goodwill [Line Items]
Goodwill		120,504		120,507	120,518
Impact of divestiture on goodwill				0
Parts & Services
Goodwill [Line Items]
Goodwill		$ 67,934		$ 67,936	$ 79,042
Parts & Services \| Extract Technology
Goodwill [Line Items]
Impact of divestiture on goodwill			$ 11,100