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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $) In Thousands, except Share data, unless otherwise specified | Total | Preferred Shares Series B | Preferred Shares Series C | Cumulative Preferred Distributions | Common Shares | Cumulative Common Distributions | Additional Paid in Capital | Cumulative Net Income | Cumulative Other Comprehensive Income (Loss) | Comprehensive Income
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2008 | $ 2,628,427 | $ 83,306 | $ 306,833 | $ (123,641) | $ 940 | $ (2,560,148) | $ 3,093,827 | $ 1,827,821 | $ (511) |
Balance (in shares) at Dec. 31, 2008 |  | 3,450,000 | 12,700,000 |  | 93,991,635 |  |  |  |  |
Comprehensive income: |  |  |  |  |  |  |  |  |  |
Net income | 193,341 |  |  |  |  |  |  | 193,341 |  | 193,341
Unrealized gain (loss) on investments | 3,741 |  |  |  |  |  |  |  | 3,741 | 3,741
Total comprehensive income | 197,082 |  |  |  |  |  |  |  |  | 197,082
Issuance of shares, net | 373,054 |  |  |  | 293 |  | 372,761 |  |  |
Issuance of shares, net (in shares) |  |  |  |  | 29,325,000 |  |  |  |  |
Common share grants | 624 |  |  |  | 1 |  | 623 |  |  |
Common share grants (in shares) |  |  |  |  | 63,700 |  |  |  |  |
Repurchase of convertible senior notes | (5,002) |  |  |  |  |  | (5,002) |  |  |
Distributions | (102,254) |  |  | (29,880) |  | (72,374) |  |  |  |
Balance at Dec. 31, 2009 | 3,091,931 | 83,306 | 306,833 | (153,521) | 1,234 | (2,632,522) | 3,462,209 | 2,021,162 | 3,230 |
Balance (in shares) at Dec. 31, 2009 |  | 3,450,000 | 12,700,000 |  | 123,380,335 |  |  |  |  |
Comprehensive income: |  |  |  |  |  |  |  |  |  |
Net income | 21,351 |  |  |  |  |  |  | 21,351 |  | 21,351
Unrealized gain (loss) on investments | (999) |  |  |  |  |  |  |  | (999) | (999)
Total comprehensive income | 20,352 |  |  |  |  |  |  |  |  | 20,352
Common share grants | 1,018 |  |  |  |  |  | 1,018 |  |  |
Common share grants (in shares) |  |  |  |  | 63,900 |  |  |  |  |
Repurchase of convertible senior notes | (1,058) |  |  |  |  |  | (1,058) |  |  |
Distributions | (252,002) |  |  | (29,880) |  | (222,122) |  |  |  |
Balance at Dec. 31, 2010 | 2,860,241 | 83,306 | 306,833 | (183,401) | 1,234 | (2,854,644) | 3,462,169 | 2,042,513 | 2,231 |
Balance (in shares) at Dec. 31, 2010 |  | 3,450,000 | 12,700,000 |  | 123,444,235 |  |  |  |  |
Comprehensive income: |  |  |  |  |  |  |  |  |  |
Net income | 190,440 |  |  |  |  |  |  | 190,440 |  | 190,440
Unrealized gain (loss) on investments | (626) |  |  |  |  |  |  |  | (626) | (626)
Total comprehensive income | 189,814 |  |  |  |  |  |  |  |  | 189,814
Common share grants | 1,366 |  |  |  | 1 |  | 1,365 |  |  |
Common share grants (in shares) |  |  |  |  | 77,300 |  |  |  |  |
Distributions | (252,119) |  |  | (29,880) |  | (222,239) |  |  |  |
Balance at Dec. 31, 2011 | $ 2,799,302 | $ 83,306 | $ 306,833 | $ (213,281) | $ 1,235 | $ (3,076,883) | $ 3,463,534 | $ 2,232,953 | $ 1,605 |
Balance (in shares) at Dec. 31, 2011 |  | 3,450,000 | 12,700,000 |  | 123,521,535 |  |  |  |  |

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