Segments - Net Income of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information
Rental revenues	$ 53,743	$ 49,560	$ 163,602	$ 142,679
Rental expenses	12,747	12,717	38,101	34,841
Real estate taxes	5,454	5,543	16,695	16,314
Segment revenues	69,024	17,502	138,947	71,473
Gross profit	38,314	32,858	114,262	94,647
General contracting and real estate services
Segment Reporting Information
Segment revenues	69,024	17,502	138,947	71,473
Segment expenses	66,252	15,944	133,491	68,350
Gross profit	2,772	1,558	5,456	3,123
Office real estate
Segment Reporting Information
Rental revenues	18,687	11,933	54,024	35,324
Rental expenses	4,886	3,409	13,626	9,222
Real estate taxes	2,044	1,547	5,583	4,318
Gross profit	11,757	6,977	34,815	21,784
Retail real estate
Segment Reporting Information
Rental revenues	21,223	20,223	64,197	57,682
Rental expenses	3,420	3,270	10,254	9,119
Real estate taxes	2,206	2,100	6,715	6,307
Gross profit	15,597	14,853	47,228	42,256
Multifamily residential real estate
Segment Reporting Information
Rental revenues	13,833	17,404	45,381	49,673
Rental expenses	4,441	6,038	14,221	16,500
Real estate taxes	1,204	1,896	4,397	5,689
Gross profit	$ 8,188	$ 9,470	$ 26,763	$ 27,484