Segments - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information
General contracting and real estate services revenues	$ 17,502	$ 58,617	$ 71,473	$ 163,283
General contracting and real estate services
Segment Reporting Information
General contracting and real estate services revenues	17,502	58,617	71,473	163,283
General contracting and real estate services expenses	15,944	56,509	68,350	157,401
General contracting and real estate services \| Intercompany Eliminations
Segment Reporting Information
General contracting and real estate services revenues	8,600	3,200	16,000	24,700
General contracting and real estate services expenses	$ 8,600	$ 3,200	$ 16,000	$ 24,500

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details