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Construction Joint Ventures - Income Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Sterling’s noncontrolling interest:
Revenues	$ 786	$ 634	$ 1,927	$ 1,316
Joint Ventures
Schedule of Equity Method Investments [Line Items]
Revenues	17,296	31,848	49,073	109,486
Income before tax	7,876	6,299	16,204	16,766
Sterling’s noncontrolling interest:
Revenues	6,891	12,881	19,674	45,798
Income before tax	$ 3,187	$ 2,533	$ 6,605	$ 6,909

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