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Segment Information - Summary of NOI by Segment (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
Property rental revenue	$ 125,900	$ 118,680	$ 370,960	$ 354,519
Total rental revenue	129,612	121,756	380,603	364,786
Property operating	40,198	37,572	109,929	105,867
Real estate taxes	18,259	17,354	55,127	53,422
Total property expense	58,457	54,926	165,056	159,289
Consolidated NOI	71,155	66,830	215,547	205,497
Parking
Segment Reporting Information
Revenue	3,712	3,076	9,643	10,267
Operating Segments | Commercial Segment
Segment Reporting Information
Property rental revenue	92,522	90,050	275,736	266,823
Total rental revenue	96,042	93,052	284,905	276,841
Property operating	27,068	26,701	76,155	78,645
Real estate taxes	12,098	12,136	36,018	36,532
Total property expense	39,166	38,837	112,173	115,177
Consolidated NOI	56,876	54,215	172,732	161,664
Operating Segments | Commercial Segment | Parking
Segment Reporting Information
Revenue	3,520	3,002	9,169	10,018
Operating Segments | Multifamily
Segment Reporting Information
Property rental revenue	35,020	30,452	100,324	94,873
Total rental revenue	35,131	30,526	100,610	95,122
Property operating	14,212	13,226	38,449	34,238
Real estate taxes	4,930	4,656	15,240	14,088
Total property expense	19,142	17,882	53,689	48,326
Consolidated NOI	15,989	12,644	46,921	46,796
Operating Segments | Multifamily | Parking
Segment Reporting Information
Revenue	111	74	286	249
Other
Segment Reporting Information
Property rental revenue	(1,642)	(1,822)	(5,100)	(7,177)
Total rental revenue	(1,561)	(1,822)	(4,912)	(7,177)
Property operating	(1,082)	(2,355)	(4,675)	(7,016)
Real estate taxes	1,231	562	3,869	2,802
Total property expense	149	(1,793)	(806)	(4,214)
Consolidated NOI	(1,710)	$ (29)	(4,106)	$ (2,963)
Other | Parking
Segment Reporting Information
Revenue	$ 81		$ 188

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Amount of expense incurred and directly related to generating revenue by lessor from operating lease of rented property and equipment.

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