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ACQUISITIONS - Schedule of Proforma Information (Details) - CEC Facilities Group, LLC - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combination [Line Items]
Pro forma revenue	$ 752,684	$ 684,971	$ 1,985,517	$ 1,852,060
Pro forma net income attributable to Sterling common stockholders	$ 87,206	$ 62,755	$ 207,187	$ 144,885

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