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GOODWILL AND INTANGIBLE ASSETS - Summary of Goodwill Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 735,670	$ 274,458
Acquisitions	264,758	461,159
Business Combination Adjustments	1,838	53
Goodwill, ending balance	1,002,266	735,670
Eastern
Goodwill [Roll Forward]
Goodwill, beginning balance	73,893	52,406
Acquisitions	774	21,487
Business Combination Adjustments	0	0
Goodwill, ending balance	74,667	73,893
Western
Goodwill [Roll Forward]
Goodwill, beginning balance	285,056	183,286
Acquisitions	92,825	101,717
Business Combination Adjustments	704	53
Goodwill, ending balance	378,585	285,056
Mid-Atlantic
Goodwill [Roll Forward]
Goodwill, beginning balance	332,247	0
Acquisitions	171,159	332,247
Business Combination Adjustments	946	0
Goodwill, ending balance	504,352	332,247
Resource Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	44,474	38,766
Acquisitions	0	5,708
Business Combination Adjustments	188	0
Goodwill, ending balance	$ 44,662	$ 44,474

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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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