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Condensed Consolidated Statements Of Equity And Perpetual Preferred Units (USD $) | Common Shares Of Beneficial Interest [Member] | Additional Paid-In Capital [Member] | Distributions In Excess Of Net Income [Member] | Notes Receivable Secured By Common Shares [Member] | Treasury Shares, At Cost [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Noncontrolling Interests [Member] | Perpetual Preferred Units [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Perpetual preferred units, Beginning Balance at Dec. 31, 2009 |  |  |  |  |  |  |  | $ 97,925,000 |
Beginning Balance at Dec. 31, 2009 | 770,000 | 2,525,656,000 | (492,571,000) | (101,000) | (462,188,000) | (41,155,000) | 78,602,000 |  | 1,609,013,000
Net income |  |  | 6,069,000 |  |  |  | 542,000 | 5,250,000 | 6,611,000
Other comprehensive income (loss) |  |  |  |  |  | (147,000) |  |  | (147,000)
Common shares issued | 29,000 | 134,588,000 |  |  |  |  |  |  | 134,617,000
Net share awards | 4,000 | 8,919,000 |  |  |  |  |  |  | 8,923,000
Employee stock purchase plan |  | (150,000) |  |  | 933,000 |  |  |  | 783,000
Common share options exercised | 1,000 | 2,459,000 |  |  |  |  |  |  | 2,460,000
Conversions of operating partnership units | 2,000 | 2,130,000 |  |  |  |  | (2,132,000) |  | 2,132,000
Cash distributions declared to perpetual preferred units |  |  |  |  |  |  |  | (5,250,000) |
Cash distributions declared to equity holders |  |  | (93,544,000) |  |  |  | (3,863,000) |  | (97,407,000)
Other | (2,000) | 4,000 |  | 101,000 |  |  | 10,000 |  | 113,000
Perpetual preferred units, Ending Balance at Sep. 30, 2010 |  |  |  |  |  |  |  | 97,925,000 |
Ending Balance at Sep. 30, 2010 | 804,000 | 2,673,606,000 | (580,046,000) |  | (461,255,000) | (41,302,000) | 73,159,000 |  | 1,664,966,000
Perpetual preferred units, Beginning Balance at Dec. 31, 2010 |  |  |  |  |  |  |  | 97,925,000 | 97,925,000
Beginning Balance at Dec. 31, 2010 | 824,000 | 2,775,625,000 | (595,317,000) |  | (461,255,000) | (33,458,000) | 70,954,000 |  | 1,757,373,000
Net income |  |  | 2,529,000 |  |  |  | 2,118,000 | 5,250,000 | 4,647,000
Other comprehensive income (loss) |  |  |  |  |  | 33,659,000 |  |  | 33,659,000
Common shares issued | 11,000 | 69,852,000 |  |  |  |  |  |  | 69,863,000
Net share awards | 4,000 | 9,597,000 |  |  | 703,000 |  |  |  | 10,304,000
Employee stock purchase plan |  | 482,000 |  |  | 1,335,000 |  |  |  | 1,817,000
Common share options exercised | 1,000 | 4,990,000 |  |  | 6,973,000 |  |  |  | 11,964,000
Conversions of operating partnership units | 1,000 | 591,000 |  |  |  |  | (592,000) |  | 592,000
Cash distributions declared to perpetual preferred units |  |  |  |  |  |  |  | (5,250,000) |
Cash distributions declared to equity holders |  |  | (108,109,000) |  |  |  | (3,669,000) |  | (111,778,000)
Other | (2,000) | 2,000 |  |  |  |  |  |  |
Perpetual preferred units, Ending Balance at Sep. 30, 2011 |  |  |  |  |  |  |  | 97,925,000 | 97,925,000
Ending Balance at Sep. 30, 2011 | $ 839,000 | $ 2,861,139,000 | $ (700,897,000) |  | $ (452,244,000) | $ 201,000 | $ 68,811,000 |  | $ 1,777,849,000

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