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Consolidated Statements of Equity (USD $) In Thousands, unless otherwise specified | Total | Preferred Shares | Common Shares | Additional Paid-in Capital | Cumulative Distributions in Excess of Net Income (Loss) | Accumulated Other Comprehensive Loss | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2011 | $ 1,205,899 | $ 216,333 | $ 720 | $ 1,451,078 | $ (534,041) | $ (1,733) | $ 73,542
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |
Conversion of common units to common shares (34,550 and 248,644 for the three months ended March 31, 2012 and 2013, respectively) | 0 |  |  | 444 |  |  | (444)
Costs associated with common shares issued to the public | (5) |  |  | (5) |  |  |
Exercise of share options (5,667 and 16,453 shares for the three months ended March 31, 2012 and 2013, respectiverly) | 82 |  |  | 82 |  |  |
Share-based compensation | 3,746 |  |  | 3,746 |  |  |
Restricted common share redemptions (97,094 and 60,960 shares for the three months ended March 31, 2012 and 2013, respectively) | (2,373) |  |  | (2,373) |  |  |
Adjustments to noncontrolling interests resulting from changes in ownership of Operating Partnership | 0 |  |  | (88) |  |  | 88
Comprehensive income | 10,296 |  |  |  | 10,295 | (468) | 469
Dividends | (23,845) |  |  |  | (23,845) |  |
Distributions to owners of common and preferred units in the Operating Partnership | (1,338) |  |  |  |  |  | (1,338)
Adjustment to arrive at fair value of noncontrolling interest | (903) |  |  | (903) |  |  |
Balance at Mar. 31, 2012 | 1,191,559 | 216,333 | 720 | 1,451,981 | (547,591) | (2,201) | 72,317
Balance at Dec. 31, 2012 | 1,436,499 | 333,833 | 809 | 1,653,672 | (617,455) | (5,435) | 71,075
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |
Conversion of common units to common shares (34,550 and 248,644 for the three months ended March 31, 2012 and 2013, respectively) | 0 |  | 3 | 3,172 |  |  | (3,175)
Common shares issued to the public (4,485,000 shares for the three months ended March 31, 2013) | 117,913 |  | 45 | 117,868 |  |  |
Exercise of share options (5,667 and 16,453 shares for the three months ended March 31, 2012 and 2013, respectiverly) | 301 |  |  | 301 |  |  |
Share-based compensation | 2,000 |  | 1 | 1,999 |  |  |
Restricted common share redemptions (97,094 and 60,960 shares for the three months ended March 31, 2012 and 2013, respectively) | (1,576) |  |  | (1,576) |  |  |
Adjustments to noncontrolling interests resulting from changes in ownership of Operating Partnership | 0 |  |  | (2,229) |  |  | 2,229
Comprehensive income | 17,187 |  |  |  | 15,020 | 1,025 | 1,142
Dividends | (29,699) |  |  |  | (29,699) |  |
Distributions to owners of common and preferred units in the Operating Partnership | (1,215) |  |  |  |  |  | (1,215)
Contributions from noncontrolling interests in other consolidated entities | 85 |  |  |  |  |  | 85
Adjustment to arrive at fair value of noncontrolling interest | (848) |  |  | (848) |  |  |
Increase in tax benefit from share-based compensation | (104) |  |  | (104) |  |  |
Balance at Mar. 31, 2013 | $ 1,540,543 | $ 333,833 | $ 858 | $ 1,772,255 | $ (632,134) | $ (4,410) | $ 70,141

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