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v3.3.1.900

Segment Information (Schedule Of Segment Reporting By Geographic Area And Property Type) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |
Rental Revenue: Class A Office | $ 2,345,175 | $ 2,240,119 | $ 1,987,671
Rental Revenue: Office/Technical | 58,163 | 61,985 | 55,525
Rental Revenue: Residential | 18,883 | 26,193 | 22,318
Rental Revenue: Hotel | 46,046 | 43,385 | 40,330
Rental Revenue Total | $ 2,468,267 | $ 2,371,682 | $ 2,105,844
Rental Revenue: % of Grand Totals | 100.00% | 100.00% | 100.00%
Rental Expenses: Class A Office | $ 848,763 | $ 802,902 | $ 716,049
Rental Expenses: Office/Technical | 15,262 | 16,466 | 14,777
Rental Expenses: Residential | 8,227 | 15,922 | 12,130
Rental Expenses: Hotel | 32,084 | 29,236 | 28,447
Rental Expenses: Total | $ 904,336 | $ 864,526 | $ 771,403
Rental Expenses: % Of Grand Totals | 100.00% | 100.00% | 100.00%
Net operating Income | $ 1,563,931 | $ 1,507,156 | $ 1,334,441
Net operating Income: % of Grand Totals | 100.00% | 100.00% | 100.00%
Boston [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental Revenue: Class A Office | $ 692,419 | $ 692,116 | $ 665,991
Rental Revenue: Office/Technical | 23,827 | 23,801 | 22,617
Rental Revenue: Residential | 4,801 | 4,528 | 4,395
Rental Revenue: Hotel | 46,046 | 43,385 | 40,330
Rental Revenue Total | $ 767,093 | $ 763,830 | $ 733,333
Rental Revenue: % of Grand Totals | 31.08% | 32.21% | 34.82%
Rental Expenses: Class A Office | $ 280,307 | $ 270,947 | $ 259,997
Rental Expenses: Office/Technical | 7,034 | 7,173 | 6,879
Rental Expenses: Residential | 2,006 | 1,957 | 1,823
Rental Expenses: Hotel | 32,084 | 29,236 | 28,447
Rental Expenses: Total | $ 321,431 | $ 309,313 | $ 297,146
Rental Expenses: % Of Grand Totals | 35.54% | 35.78% | 38.52%
Net operating Income | $ 445,662 | $ 454,517 | $ 436,187
Net operating Income: % of Grand Totals | 28.50% | 30.16% | 32.69%
New York [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental Revenue: Class A Office | $ 1,000,030 | $ 928,692 | $ 725,566
Rental Revenue: Office/Technical | 0 | 0 | 0
Rental Revenue: Residential | 0 | 0 | 0
Rental Revenue: Hotel | 0 | 0 | 0
Rental Revenue Total | $ 1,000,030 | $ 928,692 | $ 725,566
Rental Revenue: % of Grand Totals | 40.52% | 39.16% | 34.46%
Rental Expenses: Class A Office | $ 346,897 | $ 315,330 | $ 251,640
Rental Expenses: Office/Technical | 0 | 0 | 0
Rental Expenses: Residential | 0 | 0 | 0
Rental Expenses: Hotel | 0 | 0 | 0
Rental Expenses: Total | $ 346,897 | $ 315,330 | $ 251,640
Rental Expenses: % Of Grand Totals | 38.36% | 36.47% | 32.62%
Net operating Income | $ 653,133 | $ 613,362 | $ 473,926
Net operating Income: % of Grand Totals | 41.76% | 40.70% | 35.51%
San Francisco [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental Revenue: Class A Office | $ 280,005 | $ 237,381 | $ 214,755
Rental Revenue: Office/Technical | 22,429 | 23,840 | 17,259
Rental Revenue: Residential | 0 | 0 | 0
Rental Revenue: Hotel | 0 | 0 | 0
Rental Revenue Total | $ 302,434 | $ 261,221 | $ 232,014
Rental Revenue: % of Grand Totals | 12.25% | 11.01% | 11.02%
Rental Expenses: Class A Office | $ 94,268 | $ 85,178 | $ 77,905
Rental Expenses: Office/Technical | 3,938 | 4,955 | 3,708
Rental Expenses: Residential | 0 | 0 | 0
Rental Expenses: Hotel | 0 | 0 | 0
Rental Expenses: Total | $ 98,206 | $ 90,133 | $ 81,613
Rental Expenses: % Of Grand Totals | 10.86% | 10.43% | 10.58%
Net operating Income | $ 204,228 | $ 171,088 | $ 150,401
Net operating Income: % of Grand Totals | 13.06% | 11.35% | 11.27%
Washington, DC [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Rental Revenue: Class A Office | $ 372,721 | $ 381,930 | $ 381,359
Rental Revenue: Office/Technical | 11,907 | 14,344 | 15,649
Rental Revenue: Residential | 14,082 | 21,665 | 17,923
Rental Revenue: Hotel | 0 | 0 | 0
Rental Revenue Total | $ 398,710 | $ 417,939 | $ 414,931
Rental Revenue: % of Grand Totals | 16.15% | 17.62% | 19.70%
Rental Expenses: Class A Office | $ 127,291 | $ 131,447 | $ 126,507
Rental Expenses: Office/Technical | 4,290 | 4,338 | 4,190
Rental Expenses: Residential | 6,221 | 13,965 | 10,307
Rental Expenses: Hotel | 0 | 0 | 0
Rental Expenses: Total | $ 137,802 | $ 149,750 | $ 141,004
Rental Expenses: % Of Grand Totals | 15.24% | 17.32% | 18.28%
Net operating Income | $ 260,908 | $ 268,189 | $ 273,927
Net operating Income: % of Grand Totals | 16.68% | 17.79% | 20.53%

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