BUSINESS COMBINATIONS - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 22, 2024	Mar. 01, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Goodwill	$ 1,487,821			$ 1,287,736
Measurement Period Adjustments, Goodwill	218
HEPACO
Business Acquisition [Line Items]
Accounts receivable, including unbilled receivables		$ 68,496
Inventories and supplies		1,574
Prepaid expenses and other current assets		5,221
Property, plant and equipment		45,453
Permits and other intangibles		130,000
Operating lease right-of-use assets		9,385
Other long-term assets		2,660
Accrued expenses and other current liabilities		(43,966)
Current portion of operating lease liabilities		(2,758)
Operating lease liabilities, less current portion		(6,627)
Deferred tax liabilities		(8,916)
Other long-term liabilities		(374)
Total identifiable net assets		200,148
Goodwill		195,265
Total purchase price		$ 395,413
March 01, 2024 Acquisition
Business Acquisition [Line Items]
Accounts receivable, including unbilled receivables			$ 5,693
Inventories and supplies			6,817
Prepaid expenses and other current assets			423
Property, plant and equipment			38,914
Permits and other intangibles			20,200
Operating lease right-of-use assets			3,615
Other long-term assets			92
Accrued expenses and other current liabilities			(8,990)
Current portion of operating lease liabilities			(1,823)
Operating lease liabilities, less current portion			(1,792)
Total identifiable net assets			63,149
Goodwill			5,744
Total purchase price			$ 68,893
Thompson Industrial
Business Acquisition [Line Items]
Accounts receivable, including unbilled receivables	25,160			25,233
Inventories and supplies	228			228
Prepaid expenses and other current assets	1,302			1,302
Property, plant and equipment	26,719			26,719
Permits and other intangibles	28,900			28,900
Operating lease right-of-use assets	4,716			4,716
Other long-term assets	72			72
Accrued expenses and other current liabilities	(10,530)			(10,385)
Current portion of operating lease liabilities	(1,653)			(1,653)
Operating lease liabilities, less current portion	(3,063)			(3,063)
Other long-term liabilities	(560)			(560)
Total identifiable net assets	71,291			71,509
Goodwill	39,564			39,346
Total purchase price	110,855			$ 110,855
Measurement Period Adjustments, Accounts receivable, including Unbilled receivables	(73)
Measurement Period Adjustments, Accrued expenses and other current liabilities	(145)
Measurement Period Adjustments, Total identifiable net assets	(218)
Measurement Period Adjustments, Goodwill	218
Measurement Period Adjustments, Total purchase price	$ 0