Segments - Net Income of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information
Rental revenues	$ 62,913	$ 53,743	$ 179,082	$ 163,602
Rental expenses	14,756	12,747	41,392	38,101
Real estate taxes	5,867	5,454	16,910	16,695
General contracting and real estate services revenues	99,408	69,024	286,220	138,947
Segment gross profit	48,371	40,846	138,287	121,850
Retail real estate
Segment Reporting Information
Rental revenues	25,858	21,223	73,004	64,197
Rental expenses	4,125	3,420	11,715	10,254
Real estate taxes	2,312	2,206	6,789	6,715
Interest expense	2,900	3,600	8,100	10,100
Segment gross profit	19,421	15,597	54,500	47,228
Office real estate
Segment Reporting Information
Rental revenues	22,077	18,687	62,156	54,024
Rental expenses	5,925	4,886	16,282	13,626
Real estate taxes	2,262	2,044	6,524	5,583
Interest expense	2,800	3,100	7,500	7,900
Segment gross profit	13,890	11,757	39,350	34,815
Multifamily real estate
Segment Reporting Information
Rental revenues	14,978	13,833	43,922	45,381
Rental expenses	4,706	4,441	13,395	14,221
Real estate taxes	1,293	1,204	3,597	4,397
Interest expense	2,400	2,200	6,900	6,100
Segment gross profit	8,979	8,188	26,930	26,763
General contracting and real estate services
Segment Reporting Information
General contracting and real estate services revenues	99,408	69,024	286,220	138,947
General contracting and real estate services expenses	96,095	66,252	276,336	133,491
Segment gross profit	3,313	2,772	9,884	5,456
Real estate financing
Segment Reporting Information
Interest income	3,496	3,372	10,257	10,070
Interest expense	728	840	2,634	2,482
Segment gross profit	$ 2,768	$ 2,532	$ 7,623	$ 7,588