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Segment Information (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Segment Reporting [Abstract] |
Segment information |
| Pennsylvania Suburbs |  | Philadelphia CBD |  | Metropolitan, D.C. |  | New Jersey /Delaware |  | Richmond, Virginia |  | Austin, Texas |  | California |  | Corporate |  | Total
2011: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate investments, at cost: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating properties | $ | 1,218,071 |  |  | $ | 953,870 |  |  | $ | 1,255,803 |  |  | $ | 545,657 |  |  | $ | 307,698 |  |  | $ | 257,694 |  |  | $ | 254,287 |  |  | $ | — |  |  | $ | 4,793,080 |
Construction-in-progress |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,083 |  |  | $ | 25,083 |
Land inventory |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 109,008 |  |  | $ | 109,008 |
Total revenue | 158,248 |  |  | 125,366 |  |  | 128,456 |  |  | 81,629 |  |  | 36,789 |  |  | 30,895 |  |  | 21,670 |  |  | (1,248 | ) |  | 581,805 |
Property operating expenses, real estate taxes and third party management expenses | 58,440 |  |  | 48,792 |  |  | 47,786 |  |  | 40,500 |  |  | 14,727 |  |  | 13,048 |  |  | 11,507 |  |  | (989 | ) |  | 233,811 |
Net operating income | $ | 99,808 |  |  | $ | 76,574 |  |  | $ | 80,670 |  |  | $ | 41,129 |  |  | $ | 22,062 |  |  | $ | 17,847 |  |  | $ | 10,163 |  |  | $ | (259 | ) |  | $ | 347,994 |
2010: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate investments, at cost: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating properties | $ | 1,199,957 |  |  | $ | 911,354 |  |  | $ | 1,359,776 |  |  | $ | 568,413 |  |  | $ | 294,406 |  |  | $ | 254,019 |  |  | $ | 246,186 |  |  | $ | — |  |  | $ | 4,834,111 |
Construction-in-progress | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 33,322 |  |  | 33,322 |
Land inventory | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 110,055 |  |  | 110,055 |
Total revenue | 152,380 |  |  | 92,110 |  |  | 137,923 |  |  | 87,711 |  |  | 36,032 |  |  | 32,049 |  |  | 22,551 |  |  | (800 | ) |  | 559,956 |
Property operating expenses, real estate taxes and third party management expenses | 59,065 |  |  | 37,896 |  |  | 48,318 |  |  | 44,137 |  |  | 14,010 |  |  | 13,401 |  |  | 11,852 |  |  | (1,338 | ) |  | 227,341 |
Net operating income | $ | 93,315 |  |  | $ | 54,214 |  |  | $ | 89,605 |  |  | $ | 43,574 |  |  | $ | 22,022 |  |  | $ | 18,648 |  |  | $ | 10,699 |  |  | $ | 538 |  |  | $ | 332,615 |
2009: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate investments, at cost: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating properties | $ | 1,219,391 |  |  | $ | 490,602 |  |  | $ | 1,372,213 |  |  | $ | 605,181 |  |  | $ | 301,474 |  |  | $ | 268,806 |  |  | $ | 254,951 |  |  | $ | — |  |  | $ | 4,512,618 |
Construction-in-progress | — |  |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 271,962 |  |  | 271,962 |
Land inventory | — |  |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 97,368 |  |  | 97,368 |
Total revenue | 157,616 |  |  | 73,534 |  |  | 140,438 |  |  | 98,344 |  |  | 36,201 |  |  | 31,311 |  |  | 29,283 |  |  | 1,193 |  |  | 567,920 |
Property operating expenses, real estate taxes and third party management expenses | 56,297 |  |  | 31,479 |  |  | 52,899 |  |  | 45,421 |  |  | 13,871 |  |  | 14,351 |  |  | 14,735 |  |  | (1,893 | ) |  | 227,160 |
Net operating income | $ | 101,319 |  |  | $ | 42,055 |  |  | $ | 87,539 |  |  | $ | 52,923 |  |  | $ | 22,330 |  |  | $ | 16,960 |  |  | $ | 14,548 |  |  | $ | 3,086 |  |  | $ | 340,760 |
Reconciliation of consolidated net operating income |
| Year Ended December 31,
| 2011 |  | 2010 |  | 2009
| (amounts in thousands)
Consolidated net operating income | $ | 347,994 |  |  | $ | 332,615 |  |  | $ | 340,760 |
Less: |  |  |  |  |
Interest expense | (131,405 | ) |  | (132,640 | ) |  | (135,740 | )
Deferred financing costs | (4,991 | ) |  | (3,770 | ) |  | (5,864 | )
Depreciation and amortization | (217,680 | ) |  | (210,592 | ) |  | (203,572 | )
Administrative expenses | (24,602 | ) |  | (23,306 | ) |  | (20,821 | )
Recognized Hedge Activity | — |  |  | — |  |  | (916 | )
Plus: |  |  |  |  |
Interest income | 1,813 |  |  | 3,222 |  |  | 2,499 |
Historic tax credit transaction income | 12,026 |  |  | — |  |  | — |
Equity in income of real estate ventures | 3,775 |  |  | 5,305 |  |  | 4,069 |
Net gain on sales of interests in real estate ventures | 2,791 |  |  | — |  |  | (3 | )
Net gain on sale of undepreciated real estate | 45 |  |  | — |  |  | — |
Loss on real estate venture formation | (222 | ) |  | — |  |  | — |
Gain (loss) on early extinguishment of debt | (2,776 | ) |  | (2,110 | ) |  | 23,176 |
Income (loss) from continuing operations | (13,232 | ) |  | (31,276 | ) |  | 3,588 |
Income from discontinued operations | 8,517 |  |  | 13,670 |  |  | 4,501 |
Net income (loss) | $ | (4,715 | ) |  | $ | (17,606 | ) |  | $ | 8,089 |

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