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Reportable Segments - NOI from Our Rental Real Estate for Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Rental income	$ 2,980,108	$ 2,873,964	$ 2,735,180
Operating expenses	961,826	926,689	872,277
NOI	2,018,282	1,947,275	1,862,903
Same Store
Segment Reporting Information [Line Items]
Rental income	2,823,418	2,740,193	2,609,766
Operating expenses	894,477	869,635	837,602
NOI	1,928,941	1,870,558	1,772,164
Non-same Store
Segment Reporting Information [Line Items]
Operating expenses	36,350	15,117	29,758
Los Angeles | Same Store
Segment Reporting Information [Line Items]
Rental income	479,711	466,980	450,635
Operating expenses	148,030	143,983	132,858
NOI	331,681	322,997	317,777
Orange County | Same Store
Segment Reporting Information [Line Items]
Rental income	125,214	121,113	122,660
Operating expenses	28,208	26,759	26,511
NOI	97,006	94,354	96,149
San Diego | Same Store
Segment Reporting Information [Line Items]
Rental income	96,969	92,847	86,728
Operating expenses	21,127	20,794	19,506
NOI	75,842	72,053	67,222
Subtotal - Southern California | Same Store
Segment Reporting Information [Line Items]
Rental income	701,894	680,940	660,023
Operating expenses	197,365	191,536	178,875
NOI	504,529	489,404	481,148
San Francisco | Same Store
Segment Reporting Information [Line Items]
Rental income	431,323	424,547	415,173
Operating expenses	129,084	128,742	124,192
NOI	302,239	295,805	290,981
Washington D.C. | Same Store
Segment Reporting Information [Line Items]
Rental income	438,914	419,628	417,210
Operating expenses	137,786	132,610	138,570
NOI	301,128	287,018	278,640
New York | Same Store
Segment Reporting Information [Line Items]
Rental income	494,060	476,319	434,820
Operating expenses	201,857	193,311	187,218
NOI	292,203	283,008	247,602
Boston | Same Store
Segment Reporting Information [Line Items]
Rental income	327,134	314,929	270,899
Operating expenses	94,576	91,977	82,523
NOI	232,558	222,952	188,376
Seattle | Same Store
Segment Reporting Information [Line Items]
Rental income	285,539	278,170	281,959
Operating expenses	81,843	78,418	79,037
NOI	203,696	199,752	202,922
Denver | Same Store
Segment Reporting Information [Line Items]
Rental income	71,061	71,067	67,785
Operating expenses	21,600	21,328	19,569
NOI	49,461	49,739	48,216
Other Expansion Markets | Same Store
Segment Reporting Information [Line Items]
Rental income	73,493	74,593	61,897
Operating expenses	30,366	31,713	27,618
NOI	43,127	42,880	34,279
Non-same store
Segment Reporting Information [Line Items]
Rental income	100,419	35,474	74,379
Operating expenses	36,350	15,117	29,758
NOI	64,069	20,357	44,621
Same and Non-same Store
Segment Reporting Information [Line Items]
Rental income	2,923,837	2,775,667	2,684,145
Operating expenses	930,827	884,752	867,360
NOI	1,993,010	1,890,915	1,816,785
Other
Segment Reporting Information [Line Items]
Rental income	56,271	98,297	51,035
Operating expenses	30,999	41,937	4,917
NOI	$ 25,272	$ 56,360	$ 46,118

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Net operating income loss from rental real estate.

+ References

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- Definition

Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482964/270-10-50-6A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479016/842-30-45-3

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