Segment Information - Summary of NOI by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Property rental revenue	$ 115,459	$ 122,326	$ 235,839	$ 241,739
Other property revenue	810	6,690	7,191	13,144
Total rental revenue	116,269	129,016	243,030	254,883
Property operating	33,792	32,113	68,295	64,287
Real estate taxes	17,869	18,266	36,068	35,501
Total property expense	51,661	50,379	104,363	99,788
Consolidated NOI	64,608	78,637	138,667	155,095
Operating Segments | Commercial Segment
Segment Reporting Information [Line Items]
Property rental revenue	85,575	94,626	176,773	190,873
Other property revenue	772	6,600	7,016	12,974
Total rental revenue	86,347	101,226	183,789	203,847
Property operating	24,001	26,409	51,944	56,889
Real estate taxes	12,024	12,739	24,396	25,252
Total property expense	36,025	39,148	76,340	82,141
Consolidated NOI	50,322	62,078	107,449	121,706
Operating Segments | Multifamily
Segment Reporting Information [Line Items]
Property rental revenue	31,618	28,873	64,421	57,123
Other property revenue	38	90	175	170
Total rental revenue	31,656	28,963	64,596	57,293
Property operating	10,705	8,204	21,012	16,172
Real estate taxes	4,694	4,143	9,432	7,692
Total property expense	15,399	12,347	30,444	23,864
Consolidated NOI	16,257	16,616	34,152	33,429
Other
Segment Reporting Information [Line Items]
Property rental revenue	(1,734)	(1,173)	(5,355)	(6,257)
Total rental revenue	(1,734)	(1,173)	(5,355)	(6,257)
Property operating	(914)	(2,500)	(4,661)	(8,774)
Real estate taxes	1,151	1,384	2,240	2,557
Total property expense	237	(1,116)	(2,421)	(6,217)
Consolidated NOI	$ (1,971)	$ (57)	$ (2,934)	$ (40)