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Construction Joint Ventures - SEMA Financials (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule of Equity Method Investments [Line Items]
Operating income	$ 28,269	$ 22,755
Net income	$ 19,252	10,555
RLW | Joint Ventures
Schedule of Equity Method Investments [Line Items]
Ownership percentage	51.00%
SEMA Construction Inc | Joint Ventures | Variable Interest Entity, Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Revenues	$ 7,853	8,242
Operating income	552	2,527
Net income	$ 554	$ 2,528

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