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v3.25.1

Segment Information (Schedule Of Segment Reporting By Geographic Area And Property Type) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Rental Revenue: Office | $ 828,996 | $ 808,122
Rental Revenue: Residential | 12,348 | 12,684
Rental Revenue Total | $ 850,941 | $ 828,992
Rental Revenue: % of Grand Totals | 100.00% | 100.00%
Rental Expenses: Office | $ 325,681 | $ 308,471
Rental Expenses: Residential | 5,897 | 5,686
Rental Expenses: Total | $ 339,143 | $ 320,172
Rental Expenses: % Of Grand Totals | 100.00% | 100.00%
Net Operating Income | $ 511,798 | $ 508,820
Net Operating Income: % of Grand Totals | 100.00% | 100.00%
Company's Share of Net Operating Income: % of Grand Totals | 100.00% | 100.00%
Boston [Member] |  |
Segment Reporting Information [Line Items] |  |
Rental Revenue: Office | $ 305,289 | $ 280,466
Rental Revenue: Residential | 4,129 | 4,196
Rental Revenue Total | $ 319,015 | $ 292,848
Rental Revenue: % of Grand Totals | 37.48% | 35.33%
Rental Expenses: Office | $ 116,885 | $ 105,171
Rental Expenses: Residential | 1,808 | 1,593
Rental Expenses: Total | $ 126,258 | $ 112,779
Rental Expenses: % Of Grand Totals | 37.23% | 35.23%
Net Operating Income | $ 192,757 | $ 180,069
Net Operating Income: % of Grand Totals | 37.66% | 35.39%
Company's Share of Net Operating Income: % of Grand Totals | 37.58% | 35.71%
Los Angeles [Member] |  |
Segment Reporting Information [Line Items] |  |
Rental Revenue: Office | $ 17,165 | $ 20,401
Rental Revenue: Residential | 0 | 0
Rental Revenue Total | $ 17,165 | $ 20,401
Rental Revenue: % of Grand Totals | 2.02% | 2.46%
Rental Expenses: Office | $ 6,496 | $ 6,567
Rental Expenses: Residential | 0 | 0
Rental Expenses: Total | $ 6,496 | $ 6,567
Rental Expenses: % Of Grand Totals | 1.92% | 2.05%
Net Operating Income | $ 10,669 | $ 13,834
Net Operating Income: % of Grand Totals | 2.08% | 2.72%
Company's Share of Net Operating Income: % of Grand Totals | 3.64% | 4.24%
New York [Member] |  |
Segment Reporting Information [Line Items] |  |
Rental Revenue: Office | $ 263,425 | $ 260,809
Rental Revenue: Residential | 0 | 0
Rental Revenue Total | $ 263,425 | $ 260,809
Rental Revenue: % of Grand Totals | 30.96% | 31.46%
Rental Expenses: Office | $ 109,961 | $ 107,481
Rental Expenses: Residential | 0 | 0
Rental Expenses: Total | $ 109,961 | $ 107,481
Rental Expenses: % Of Grand Totals | 32.42% | 33.57%
Net Operating Income | $ 153,464 | $ 153,328
Net Operating Income: % of Grand Totals | 29.99% | 30.13%
Company's Share of Net Operating Income: % of Grand Totals | 24.77% | 24.88%
San Francisco [Member] |  |
Segment Reporting Information [Line Items] |  |
Rental Revenue: Office | $ 125,808 | $ 132,614
Rental Revenue: Residential | 3,503 | 3,958
Rental Revenue Total | $ 129,311 | $ 136,572
Rental Revenue: % of Grand Totals | 15.20% | 16.47%
Rental Expenses: Office | $ 48,552 | $ 46,942
Rental Expenses: Residential | 2,140 | 2,218
Rental Expenses: Total | $ 50,692 | $ 49,160
Rental Expenses: % Of Grand Totals | 14.95% | 15.35%
Net Operating Income | $ 78,619 | $ 87,412
Net Operating Income: % of Grand Totals | 15.36% | 17.18%
Company's Share of Net Operating Income: % of Grand Totals | 16.82% | 18.60%
Seattle |  |
Segment Reporting Information [Line Items] |  |
Rental Revenue: Office | $ 11,991 | $ 10,910
Rental Revenue: Residential | 0 | 0
Rental Revenue Total | $ 11,991 | $ 10,910
Rental Revenue: % of Grand Totals | 1.41% | 1.32%
Rental Expenses: Office | $ 2,996 | $ 3,081
Rental Expenses: Residential | 0 | 0
Rental Expenses: Total | $ 2,996 | $ 3,081
Rental Expenses: % Of Grand Totals | 0.88% | 0.96%
Net Operating Income | $ 8,995 | $ 7,829
Net Operating Income: % of Grand Totals | 1.76% | 1.54%
Company's Share of Net Operating Income: % of Grand Totals | 2.27% | 1.95%
Washington, DC [Member] |  |
Segment Reporting Information [Line Items] |  |
Rental Revenue: Office | $ 105,318 | $ 102,922
Rental Revenue: Residential | 4,716 | 4,530
Rental Revenue Total | $ 110,034 | $ 107,452
Rental Revenue: % of Grand Totals | 12.93% | 12.96%
Rental Expenses: Office | $ 40,791 | $ 39,229
Rental Expenses: Residential | 1,949 | 1,875
Rental Expenses: Total | $ 42,740 | $ 41,104
Rental Expenses: % Of Grand Totals | 12.60% | 12.84%
Net Operating Income | $ 67,294 | $ 66,348
Net Operating Income: % of Grand Totals | 13.15% | 13.04%
Company's Share of Net Operating Income: % of Grand Totals | 14.92% | 14.62%
Hotel [Member] |  |
Segment Reporting Information [Line Items] |  |
Other revenue | $ 9,597 | $ 8,186
Operating expense | 7,565 | 6,015
Hotel [Member] | Boston [Member] |  |
Segment Reporting Information [Line Items] |  |
Other revenue | 9,597 | 8,186
Operating expense | 7,565 | 6,015
Hotel [Member] | Los Angeles [Member] |  |
Segment Reporting Information [Line Items] |  |
Other revenue | 0 | 0
Operating expense | 0 | 0
Hotel [Member] | New York [Member] |  |
Segment Reporting Information [Line Items] |  |
Other revenue | 0 | 0
Operating expense | 0 | 0
Hotel [Member] | San Francisco [Member] |  |
Segment Reporting Information [Line Items] |  |
Other revenue | 0 | 0
Operating expense | 0 | 0
Hotel [Member] | Seattle |  |
Segment Reporting Information [Line Items] |  |
Other revenue | 0 | 0
Operating expense | 0 | 0
Hotel [Member] | Washington, DC [Member] |  |
Segment Reporting Information [Line Items] |  |
Other revenue | 0 | 0
Operating expense | 0 | 0
Noncontrolling interest - property partnerships [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | (49,702) | (46,570)
Noncontrolling interest - property partnerships [Member] | Boston [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | (15,301) | (11,056)
Noncontrolling interest - property partnerships [Member] | Los Angeles [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 0 | 0
Noncontrolling interest - property partnerships [Member] | New York [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | (34,401) | (35,514)
Noncontrolling interest - property partnerships [Member] | San Francisco [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 0 | 0
Noncontrolling interest - property partnerships [Member] | Seattle |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 0 | 0
Noncontrolling interest - property partnerships [Member] | Washington, DC [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 0 | 0
Unconsolidated Joint Ventures [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 32,682 | 35,430
Unconsolidated Joint Ventures [Member] | Boston [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 8,451 | 8,757
Unconsolidated Joint Ventures [Member] | Los Angeles [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 7,352 | 7,248
Unconsolidated Joint Ventures [Member] | New York [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 3,513 | 5,984
Unconsolidated Joint Ventures [Member] | San Francisco [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 4,581 | 5,154
Unconsolidated Joint Ventures [Member] | Seattle |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 2,257 | 1,876
Unconsolidated Joint Ventures [Member] | Washington, DC [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 6,528 | 6,411
Company's Share [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 494,778 | 497,680
Company's Share [Member] | Boston [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 185,907 | 177,770
Company's Share [Member] | Los Angeles [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 18,021 | 21,082
Company's Share [Member] | New York [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 122,576 | 123,798
Company's Share [Member] | San Francisco [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 83,200 | 92,566
Company's Share [Member] | Seattle |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | 11,252 | 9,705
Company's Share [Member] | Washington, DC [Member] |  |
Segment Reporting Information [Line Items] |  |
Net Operating Income | $ 73,822 | $ 72,759

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