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CONSOLIDATED STATEMENTS OF EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS (USD $) In Thousands, except Share data, unless otherwise specified | Total | Redeemable Noncontrolling Interests | Total Stockholders' Equity | Common Stock | Additional Paid-in Capital | Accumulated Deficit | Accumulated Other Comprehensive Loss | Noncontrolling Interests | Comprehensive Income
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2008 | $ 1,641,884 | $ 23,327 | $ 1,393,766 | $ 769 | $ 1,721,256 | $ (274,834) | $ (53,425) | $ 248,118 |
Balance (in shares) at Dec. 31, 2008 |  |  |  | 76,883,634 |  |  |  |  |
Comprehensive income: |  |  |  |  |  |  |  |  |
Net income | 138,666 | 584 |  |  |  | 120,742 |  | 17,924 | 138,666
Net income | 120,742 |  | 120,742 |  |  |  |  |  |
Interest rate swap/cap agreements | 28,028 |  | 28,028 |  |  |  | 28,028 |  | 28,028
Total comprehensive income | 166,694 | 584 | 148,770 |  |  | 120,742 | 28,028 | 17,924 | 166,694
Amortization of share and unit-based plans | 17,963 |  | 17,963 | 2 | 17,961 |  |  |  |
Amortization of share and unit-based plans (in shares) |  |  |  | 213,288 |  |  |  |  |
Exercise of stock options | 104 |  | 104 |  | 104 |  |  |  |
Exercise of stock options (in shares) |  |  |  | 5,325 |  |  |  |  |
Employee stock purchases | 611 |  | 611 |  | 611 |  |  |  |
Employee stock purchases (in shares) |  |  |  | 38,174 |  |  |  |  |
Distributions paid ($2.05), ($2.10) and ($2.60) per share for the year ended 2011, 2010 and 2009, respectively | (191,838) |  | (191,838) |  |  | (191,838) |  |  |
Distributions to noncontrolling interests | (30,291) | (584) |  |  |  |  |  | (30,291) |
Stock dividend | 121,273 |  | 121,273 | 58 | 121,215 |  |  |  |
Stock dividend (in shares) |  |  |  | 5,712,928 |  |  |  |  |
Issuance of stock warrants | 14,503 |  | 14,503 |  | 14,503 |  |  |  |
Stock offering | 383,450 |  | 383,450 | 138 | 383,312 |  |  |  |
Stock offering (in shares) |  |  |  | 13,800,000 |  |  |  |  |
Contributions from noncontrolling interests | 12,153 |  |  |  |  |  |  | 12,153 |
Other | (7,643) |  | (7,643) |  | (7,643) |  |  |  |
Conversion of noncontrolling interests to common shares |  |  | 455 |  | 455 |  |  | (455) |
Conversion of noncontrolling interests to common shares (in shares) |  |  |  | 14,340 |  |  |  |  |
Redemption of noncontrolling interests | (397) | (2,736) | 47 |  | 47 |  |  | (444) |
Adjustment of noncontrolling interest in Operating Partnership |  |  | (23,890) |  | (23,890) |  |  | 23,890 |
Balance at Dec. 31, 2009 | 2,128,466 | 20,591 | 1,857,571 | 967 | 2,227,931 | (345,930) | (25,397) | 270,895 |
Balance (in shares) at Dec. 31, 2009 |  |  |  | 96,667,689 |  |  |  |  |
Comprehensive income: |  |  |  |  |  |  |  |  |
Net income | 28,001 | 419 |  |  |  | 25,190 |  | 2,811 | 28,001
Net income | 25,190 |  | 25,190 |  |  |  |  |  |
Interest rate swap/cap agreements | 22,160 |  | 22,160 |  |  |  | 22,160 |  | 22,160
Total comprehensive income | 50,161 | 419 | 47,350 |  |  | 25,190 | 22,160 | 2,811 | 50,161
Amortization of share and unit-based plans | 27,545 |  | 27,545 | 6 | 27,539 |  |  |  |
Amortization of share and unit-based plans (in shares) |  |  |  | 628,009 |  |  |  |  |
Exercise of stock options | 99 |  | 99 |  | 99 |  |  |  |
Exercise of stock options (in shares) |  |  |  | 5,400 |  |  |  |  |
Exercise of stock warrants | (17,639) |  | (17,639) |  | (17,639) |  |  |  |
Employee stock purchases | 803 |  | 803 |  | 803 |  |  |  |
Employee stock purchases (in shares) |  |  |  | 28,450 |  |  |  |  |
Distributions paid ($2.05), ($2.10) and ($2.60) per share for the year ended 2011, 2010 and 2009, respectively | (243,617) |  | (243,617) |  |  | (243,617) |  |  |
Distributions to noncontrolling interests | (26,908) | (419) |  |  |  |  |  | (26,908) |
Stock dividend | 43,086 |  | 43,086 | 14 | 43,072 |  |  |  |
Stock dividend (in shares) |  |  |  | 1,449,542 |  |  |  |  |
Stock offering | 1,220,829 |  | 1,220,829 | 310 | 1,220,519 |  |  |  |
Stock offering (in shares) |  |  |  | 31,000,000 |  |  |  |  |
Contributions from noncontrolling interests | 5,159 |  |  |  |  |  |  | 5,159 |
Other | 205 |  | 205 |  | 205 |  |  |  |
Conversion of noncontrolling interests to common shares |  |  | 8,759 | 7 | 8,752 |  |  | (8,759) |
Conversion of noncontrolling interests to common shares (in shares) |  |  |  | 672,942 |  |  |  |  |
Redemption of noncontrolling interests | (193) | (9,225) |  |  |  |  |  | (193) |
Adjustment of noncontrolling interest in Operating Partnership |  |  | (54,712) |  | (54,712) |  |  | 54,712 |
Balance at Dec. 31, 2010 | 3,187,996 | 11,366 | 2,890,279 | 1,304 | 3,456,569 | (564,357) | (3,237) | 297,717 |
Balance (in shares) at Dec. 31, 2010 |  |  |  | 130,452,032 |  |  |  |  |
Comprehensive income: |  |  |  |  |  |  |  |  |
Net income | 168,910 | 165 |  |  |  | 156,866 |  | 12,044 | 168,910
Net income | 156,866 |  | 156,866 |  |  |  |  |  |
Interest rate swap/cap agreements | 3,237 |  | 3,237 |  |  |  | 3,237 |  | 3,237
Total comprehensive income | 172,147 | 165 | 160,103 |  |  | 156,866 | 3,237 | 12,044 | 172,147
Amortization of share and unit-based plans | 18,519 |  | 18,519 | 6 | 18,513 |  |  |  |
Amortization of share and unit-based plans (in shares) |  |  |  | 597,415 |  |  |  |  |
Exercise of stock options | 266 |  | 266 |  | 266 |  |  |  |
Exercise of stock options (in shares) |  |  |  | 10,800 |  |  |  |  |
Exercise of stock warrants | (1,278) |  | (1,278) |  | (1,278) |  |  |  |
Employee stock purchases | 766 |  | 766 |  | 766 |  |  |  |
Employee stock purchases (in shares) |  |  |  | 17,285 |  |  |  |  |
Distributions paid ($2.05), ($2.10) and ($2.60) per share for the year ended 2011, 2010 and 2009, respectively | (271,140) |  | (271,140) |  |  | (271,140) |  |  |
Distributions to noncontrolling interests | (25,643) | (165) |  |  |  |  |  | (25,643) |
Contributions from noncontrolling interests | 78,921 |  |  |  |  |  |  | 78,921 |
Other | 4,139 |  | 4,139 |  | 4,139 |  |  |  |
Conversion of noncontrolling interests to common shares |  |  | 21,698 | 11 | 21,687 |  |  | (21,698) |
Conversion of noncontrolling interests to common shares (in shares) |  |  |  | 1,075,912 |  |  |  |  |
Redemption of noncontrolling interests | (42) | (11,366) | (26) |  | (26) |  |  | (16) |
Adjustment of noncontrolling interest in Operating Partnership |  |  | (9,989) |  | (9,989) |  |  | 9,989 |
Balance at Dec. 31, 2011 | $ 3,164,651 |  | $ 2,813,337 | $ 1,321 | $ 3,490,647 | $ (678,631) |  | $ 351,314 |
Balance (in shares) at Dec. 31, 2011 |  |  |  | 132,153,444 |  |  |  |  |

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