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Consolidated Statements Of Income (Loss) And Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Property revenues |  |  |  |  |  |
Rental revenues | $ 563,010 |  | $ 516,908 |  | $ 519,637 |
Other property revenues | 92,858 |  | 84,542 |  | 83,011 |
Total property revenues | 655,868 | [1] | 601,450 | [1] | 602,648 |
Property expenses |  |  |  |  |  |
Property operating and maintenance | 187,587 |  | 175,926 |  | 168,773 |
Real estate taxes | 69,092 |  | 66,986 |  | 68,826 |
Total property expenses | 256,679 |  | 242,912 |  | 237,599 |
Non-property income |  |  |  |  |  |
Fee and asset management | 9,973 |  | 8,172 |  | 8,008 |
Interest and other income | 4,649 |  | 8,584 |  | 2,826 |
Income on deferred compensation plans | 6,773 |  | 11,581 |  | 14,609 |
Total non-property income | 21,395 |  | 28,337 |  | 25,443 |
Other expenses |  |  |  |  |  |
Property management | 20,686 |  | 19,982 |  | 18,864 |
Fee and asset management | 5,935 |  | 4,841 |  | 4,878 |
General and administrative | 35,456 |  | 30,762 |  | 31,243 |
Interest | 112,414 |  | 125,893 |  | 128,296 |
Depreciation and amortization | 179,867 |  | 170,362 |  | 168,845 |
Amortization of deferred financing costs | 5,877 |  | 4,102 |  | 3,925 |
Expense on deferred compensation plans | 6,773 |  | 11,581 |  | 14,609 |
Total other expenses | 367,008 |  | 367,523 |  | 370,660 |
Loss on discontinuation of hedging relationship | (29,791) |  |  |  |  |
Gain on sale of properties, including land | 4,748 |  | 236 |  |  |
Gain on sale of unconsolidated joint venture interests | 1,136 |  |  |  |  |
Loss on early retirement of debt |  |  |  |  | (2,550) |
Impairment associated with land development activities |  |  |  |  | (85,614) |
Impairment provision on a technology investment |  |  | (1,000) |  |  |
Equity in income (loss) of joint ventures | 5,679 | [2] | (839) | [2] | 695 | [2]
Income (loss) from continuing operations before income taxes | 35,348 |  | 17,749 |  | (67,637) |
Income tax expense - current | (2,220) |  | (1,581) |  | (967) |
Income (loss) from continuing operations | 33,128 |  | 16,168 |  | (68,604) |
Income from discontinued operations | 2,212 |  | 5,360 |  | 7,514 |
Gain on sale of discontinued operations, net of tax | 24,621 |  | 9,614 |  | 16,887 |
Net income (loss) | 59,961 |  | 31,142 |  | (44,203) |
Less (income) loss allocated to noncontrolling interests from continuing operations | (3,582) |  | (926) |  | 403 |
Less income allocated to perpetual preferred units | (7,000) |  | (7,000) |  | (7,000) |
Net income (loss) attributable to common shareholders | 49,379 | [1] | 23,216 | [1] | (50,800) |
Earnings per share - basic |  |  |  |  |  |
Income (loss) from continuing operations attributable to common shareholders | $ 0.30 |  | $ 0.11 |  | $ (1.19) |
Income from discontinued operations, including gain on sale, attributable to common shareholders | $ 0.37 |  | $ 0.22 |  | $ 0.39 |
Net income (loss) attributable to common shareholders | $ 0.67 | [1] | $ 0.33 | [1] | $ (0.80) |
Earnings per share - diluted |  |  |  |  |  |
Income (loss) from continuing operations attributable to common shareholders | $ 0.30 |  | $ 0.11 |  | $ (1.19) |
Income from discontinued operations, including gain on sale, attributable to common shareholders - per share | $ 0.36 |  | $ 0.22 |  | $ 0.39 |
Net income (loss) attributable to common shareholders | $ 0.66 | [1] | $ 0.33 | [1] | $ (0.80) |
Weighted average number of common shares outstanding - basic | 72,756 |  | 68,608 |  | 62,359 |
Weighted average number of common shares outstanding - diluted | 73,701 |  | 68,957 |  | 62,359 |
Net income (loss) attributable to common shareholders |  |  |  |  |  |
Income (loss) from continuing operations | 33,128 |  | 16,168 |  | (68,604) |
Less (income) loss allocated to noncontrolling interests from continuing operations | (3,582) |  | (926) |  | 403 |
Less income allocated to perpetual preferred units | (7,000) |  | (7,000) |  | (7,000) |
Income (loss) from continuing operations attributable to common shareholders | 22,546 |  | 8,242 |  | (75,201) |
Income from discontinued operations, including gain on sale, attributable to common shareholders | 26,833 |  | 14,974 |  | 24,401 |
Net income (loss) attributable to common shareholders | 49,379 | [1] | 23,216 | [1] | (50,800) |
Consolidated Statements of Comprehensive Income (Loss) |  |  |  |  |  |
Net income (loss) | 59,961 |  | 31,142 |  | (44,203) |
Other comprehensive income (loss) |  |  |  |  |  |
Unrealized loss on cash flow hedging activities | (2,692) |  | (19,059) |  | (12,291) |
Reclassification of net losses on cash flow hedging activities | 39,657 |  | 23,385 |  | 22,192 |
Unrealized gain on available-for-sale securities, net of tax |  |  | 3,306 |  |  |
Reclassification of gain on available-for-sale investment to earnings, net of tax | (3,306) |  |  |  |  |
Unrealized gain (loss) and unamortized prior service cost on postretirement obligations | (884) |  | 65 |  |  |
Comprehensive income (loss) | 92,736 |  | 38,839 |  | (34,302) |
Less (income) loss allocated to noncontrolling interests from continuing operations | (3,582) |  | (926) |  | 403 |
Less income allocated to perpetual preferred units | (7,000) |  | (7,000) |  | (7,000) |
Comprehensive income (loss) attributable to common shareholders | $ 82,154 |  | $ 30,913 |  | $ (40,899) |
[1] | Net income per share is computed independently for each of the quarters presented. Therefore, the sum of quarterly net income (loss) per share amounts may not equal the total computed for the year.
[2] | Equity in income (loss) of unconsolidated joint ventures excludes our ownership interest of fee income from various property management services and interest income from mezzanine loans with our joint ventures.

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- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=6921628&loc=SL4569616-111683 + Details
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- Definition The amount of loss reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(4) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80748-113994 + Details
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