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Segments - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Segment Reporting Information    
General contracting and real estate services revenues $ 47,268 $ 17,036
General contracting and real estate services expenses 45,550 16,286
General contracting and real estate services | General contracting and real estate services | Intercompany Eliminations    
Segment Reporting Information    
General contracting and real estate services revenues 13,100 30,200
General contracting and real estate services expenses $ 13,000 $ 29,900