Segment Information (Schedule Of Segment Reporting By Geographic Area And Property Type) (Details) - USD ($) $ in Thousands |
3 Months Ended |
6 Months Ended |
Jun. 30, 2022 |
Jun. 30, 2021 |
Jun. 30, 2022 |
Jun. 30, 2021 |
Segment Reporting Information [Line Items] |
|
|
|
|
|
Rental Revenue: Class A Office |
[1] |
$ 735,333
|
$ 692,544
|
$ 1,462,221
|
$ 1,386,124
|
Rental Revenue: Residential |
[1] |
16,912
|
9,763
|
29,878
|
18,938
|
Rental Revenue Total |
[1] |
$ 764,334
|
$ 703,868
|
$ 1,508,745
|
$ 1,407,255
|
Rental Revenue: % of Grand Totals |
|
100.00%
|
100.00%
|
100.00%
|
100.00%
|
Rental Expenses: Class A Office |
|
$ 264,030
|
$ 242,775
|
$ 527,853
|
$ 494,037
|
Rental Expenses: Residential |
|
9,818
|
5,928
|
16,250
|
12,055
|
Rental Expenses: Total |
|
$ 280,292
|
$ 250,699
|
$ 555,387
|
$ 510,139
|
Rental Expenses: % Of Grand Totals |
|
100.00%
|
100.00%
|
100.00%
|
100.00%
|
Net Operating Income |
|
$ 484,042
|
$ 453,169
|
$ 953,358
|
$ 897,116
|
Net Operating Income: % of Grand Totals |
|
100.00%
|
100.00%
|
100.00%
|
100.00%
|
Company's Share of Net Operating Income: % of Grand Totals |
|
100.00%
|
100.00%
|
100.00%
|
100.00%
|
Boston [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Rental Revenue: Class A Office |
[1] |
$ 244,936
|
$ 229,571
|
$ 487,014
|
$ 459,974
|
Rental Revenue: Residential |
[1] |
3,748
|
3,131
|
7,344
|
6,176
|
Rental Revenue Total |
[1] |
$ 260,773
|
$ 234,263
|
$ 511,004
|
$ 468,343
|
Rental Revenue: % of Grand Totals |
|
34.11%
|
33.28%
|
33.87%
|
33.28%
|
Rental Expenses: Class A Office |
|
$ 87,027
|
$ 78,165
|
$ 177,555
|
$ 158,046
|
Rental Expenses: Residential |
|
1,492
|
1,435
|
2,929
|
2,890
|
Rental Expenses: Total |
|
$ 94,963
|
$ 81,596
|
$ 191,768
|
$ 164,983
|
Rental Expenses: % Of Grand Totals |
|
33.88%
|
32.55%
|
34.53%
|
32.34%
|
Net Operating Income |
|
$ 165,810
|
$ 152,667
|
$ 319,236
|
$ 303,360
|
Net Operating Income: % of Grand Totals |
|
34.25%
|
33.69%
|
33.49%
|
33.82%
|
Company's Share of Net Operating Income: % of Grand Totals |
|
34.44%
|
33.70%
|
33.70%
|
33.68%
|
Los Angeles [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Rental Revenue: Class A Office |
[1] |
$ 0
|
$ 0
|
$ 0
|
$ 0
|
Rental Revenue: Residential |
[1] |
0
|
0
|
0
|
0
|
Rental Revenue Total |
[1] |
$ 0
|
$ 0
|
$ 0
|
$ 0
|
Rental Revenue: % of Grand Totals |
|
0.00%
|
0.00%
|
0.00%
|
0.00%
|
Rental Expenses: Class A Office |
|
$ 0
|
$ 0
|
$ 0
|
$ 0
|
Rental Expenses: Residential |
|
0
|
0
|
0
|
0
|
Rental Expenses: Total |
|
$ 0
|
$ 0
|
$ 0
|
$ 0
|
Rental Expenses: % Of Grand Totals |
|
0.00%
|
0.00%
|
0.00%
|
0.00%
|
Net Operating Income |
|
$ 0
|
$ 0
|
$ 0
|
$ 0
|
Net Operating Income: % of Grand Totals |
|
0.00%
|
0.00%
|
0.00%
|
0.00%
|
Company's Share of Net Operating Income: % of Grand Totals |
|
2.81%
|
2.84%
|
2.90%
|
3.09%
|
New York [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Rental Revenue: Class A Office |
[1] |
$ 254,264
|
$ 252,182
|
$ 511,134
|
$ 502,346
|
Rental Revenue: Residential |
[1] |
0
|
0
|
0
|
0
|
Rental Revenue Total |
[1] |
$ 254,264
|
$ 252,182
|
$ 511,134
|
$ 502,346
|
Rental Revenue: % of Grand Totals |
|
33.27%
|
35.84%
|
33.88%
|
35.70%
|
Rental Expenses: Class A Office |
|
$ 95,363
|
$ 92,662
|
$ 191,703
|
$ 192,047
|
Rental Expenses: Residential |
|
0
|
0
|
0
|
0
|
Rental Expenses: Total |
|
$ 95,363
|
$ 92,662
|
$ 191,703
|
$ 192,047
|
Rental Expenses: % Of Grand Totals |
|
34.02%
|
36.96%
|
34.52%
|
37.65%
|
Net Operating Income |
|
$ 158,901
|
$ 159,520
|
$ 319,431
|
$ 310,299
|
Net Operating Income: % of Grand Totals |
|
32.83%
|
35.20%
|
33.51%
|
34.59%
|
Company's Share of Net Operating Income: % of Grand Totals |
|
25.95%
|
28.68%
|
26.57%
|
27.99%
|
San Francisco [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Rental Revenue: Class A Office |
[1] |
$ 133,707
|
$ 126,181
|
$ 266,082
|
$ 256,779
|
Rental Revenue: Residential |
[1] |
5,850
|
690
|
8,241
|
1,011
|
Rental Revenue Total |
[1] |
$ 139,557
|
$ 126,871
|
$ 274,323
|
$ 257,790
|
Rental Revenue: % of Grand Totals |
|
18.26%
|
18.02%
|
18.18%
|
18.32%
|
Rental Expenses: Class A Office |
|
$ 45,201
|
$ 40,954
|
$ 88,609
|
$ 81,203
|
Rental Expenses: Residential |
|
5,145
|
1,544
|
7,013
|
3,230
|
Rental Expenses: Total |
|
$ 50,346
|
$ 42,498
|
$ 95,622
|
$ 84,433
|
Rental Expenses: % Of Grand Totals |
|
17.96%
|
16.95%
|
17.22%
|
16.55%
|
Net Operating Income |
|
$ 89,211
|
$ 84,373
|
$ 178,701
|
$ 173,357
|
Net Operating Income: % of Grand Totals |
|
18.43%
|
18.62%
|
18.74%
|
19.32%
|
Company's Share of Net Operating Income: % of Grand Totals |
|
19.58%
|
20.35%
|
19.87%
|
21.06%
|
Seattle |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Rental Revenue: Class A Office |
[1] |
$ 6,472
|
|
$ 6,472
|
|
Rental Revenue: Residential |
[1] |
0
|
|
0
|
|
Rental Revenue Total |
[1] |
$ 6,472
|
|
$ 6,472
|
|
Rental Revenue: % of Grand Totals |
|
0.85%
|
|
0.43%
|
|
Rental Expenses: Class A Office |
|
$ 1,680
|
|
$ 1,680
|
|
Rental Expenses: Residential |
|
0
|
|
0
|
|
Rental Expenses: Total |
|
$ 1,680
|
|
$ 1,680
|
|
Rental Expenses: % Of Grand Totals |
|
0.60%
|
|
0.30%
|
|
Net Operating Income |
|
$ 4,792
|
|
$ 4,792
|
|
Net Operating Income: % of Grand Totals |
|
0.99%
|
|
0.50%
|
|
Company's Share of Net Operating Income: % of Grand Totals |
|
1.43%
|
|
0.93%
|
|
Washington, DC [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Rental Revenue: Class A Office |
[1] |
$ 95,954
|
$ 84,610
|
$ 191,519
|
$ 167,025
|
Rental Revenue: Residential |
[1] |
7,314
|
5,942
|
14,293
|
11,751
|
Rental Revenue Total |
[1] |
$ 103,268
|
$ 90,552
|
$ 205,812
|
$ 178,776
|
Rental Revenue: % of Grand Totals |
|
13.51%
|
12.86%
|
13.64%
|
12.70%
|
Rental Expenses: Class A Office |
|
$ 34,759
|
$ 30,994
|
$ 68,306
|
$ 62,741
|
Rental Expenses: Residential |
|
3,181
|
2,949
|
6,308
|
5,935
|
Rental Expenses: Total |
|
$ 37,940
|
$ 33,943
|
$ 74,614
|
$ 68,676
|
Rental Expenses: % Of Grand Totals |
|
13.54%
|
13.54%
|
13.43%
|
13.46%
|
Net Operating Income |
|
$ 65,328
|
$ 56,609
|
$ 131,198
|
$ 110,100
|
Net Operating Income: % of Grand Totals |
|
13.50%
|
12.49%
|
13.76%
|
12.27%
|
Company's Share of Net Operating Income: % of Grand Totals |
|
15.79%
|
14.43%
|
16.03%
|
14.18%
|
Hotel [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Other revenue |
[1] |
$ 12,089
|
$ 1,561
|
$ 16,646
|
$ 2,193
|
Operating expense |
|
6,444
|
1,996
|
11,284
|
4,047
|
Hotel [Member] | Boston [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Other revenue |
[1] |
12,089
|
1,561
|
16,646
|
2,193
|
Operating expense |
|
6,444
|
1,996
|
11,284
|
4,047
|
Hotel [Member] | Los Angeles [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Other revenue |
[1] |
0
|
0
|
0
|
0
|
Operating expense |
|
0
|
0
|
0
|
0
|
Hotel [Member] | New York [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Other revenue |
[1] |
0
|
0
|
0
|
0
|
Operating expense |
|
0
|
0
|
0
|
0
|
Hotel [Member] | San Francisco [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Other revenue |
[1] |
0
|
0
|
0
|
0
|
Operating expense |
|
0
|
0
|
0
|
0
|
Hotel [Member] | Seattle |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Other revenue |
[1] |
0
|
|
0
|
|
Operating expense |
|
0
|
|
0
|
|
Hotel [Member] | Washington, DC [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Other revenue |
[1] |
0
|
0
|
0
|
0
|
Operating expense |
|
0
|
0
|
0
|
0
|
Noncontrolling interest - property partnerships [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
(47,862)
|
(46,287)
|
(94,917)
|
(90,663)
|
Noncontrolling interest - property partnerships [Member] | Boston [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
(11,377)
|
(10,576)
|
(23,112)
|
(20,800)
|
Noncontrolling interest - property partnerships [Member] | Los Angeles [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
0
|
0
|
0
|
0
|
Noncontrolling interest - property partnerships [Member] | New York [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
(36,485)
|
(35,711)
|
(71,805)
|
(69,863)
|
Noncontrolling interest - property partnerships [Member] | San Francisco [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
0
|
0
|
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
|
0
|
0
|
Unconsolidated Joint Ventures [Member] | Boston [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
8,134
|
3,624
|
17,827
|
5,905
|
Unconsolidated Joint Ventures [Member] | Los Angeles [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
13,247
|
12,265
|
27,004
|
26,457
|
Unconsolidated Joint Ventures [Member] | New York [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
18
|
172
|
(138)
|
(621)
|
Unconsolidated Joint Ventures [Member] | San Francisco [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
3,183
|
3,580
|
6,364
|
7,060
|
Unconsolidated Joint Ventures [Member] | Seattle |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
1,944
|
|
3,899
|
|
Unconsolidated Joint Ventures [Member] | Washington, DC [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
9,184
|
5,776
|
18,075
|
11,411
|
Company's Share [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
471,890
|
432,299
|
931,472
|
856,665
|
Company's Share [Member] | Boston [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
162,567
|
145,715
|
313,951
|
288,465
|
Company's Share [Member] | Los Angeles [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
13,247
|
12,265
|
27,004
|
26,457
|
Company's Share [Member] | New York [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
122,434
|
123,981
|
247,488
|
239,815
|
Company's Share [Member] | San Francisco [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
92,394
|
87,953
|
185,065
|
180,417
|
Company's Share [Member] | Seattle |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
6,736
|
|
8,691
|
|
Company's Share [Member] | Washington, DC [Member] |
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
Net Operating Income |
|
$ 74,512
|
$ 62,385
|
$ 149,273
|
$ 121,511
|
|
|