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Consolidated Statements of Common Stockholders' Equity (USD $) In Thousands, except Share data | Total | Common Stock | Other Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2009 | $ 2,556,647 | $ 188,389 | $ 1,015,678 | $ 1,377,039 | $ (20,833) | $ (3,626)
Treasury stock (in shares) at Dec. 31, 2009 |  |  |  |  |  | (538,921)
Balance (in shares) at Dec. 31, 2009 |  | 188,389,265 |  |  |  |
Net income (loss) | 240,659 |  | 0 | 240,659 | 0 |
Other comprehensive loss | (10,428) |  | 0 | 0 | (10,428) |
Dividends declared on preferred stocks | (685) |  | 0 | (685) | 0 |
Dividends declared on common stock | (119,574) |  | 0 | (119,574) | 0 |
Stock-based compensation |  | 426,610 |  |  |  |
Stock-based compensation | 8,694 | 427 | 8,267 | 0 | 0 |
Tax benefit (deficit) on stock-based compensation | 924 |  | 924 | 0 | 0 |
Issuance of common stock |  | 85,504 |  |  |  |
Issuance of common stock | 1,565 | 85 | 1,480 | 0 | 0 |
Balance at Dec. 31, 2010 | 2,677,802 | 188,901 | 1,026,349 | 1,497,439 | (31,261) | (3,626)
Treasury stock (in shares) at Dec. 31, 2010 |  |  |  |  |  | (538,921)
Balance (in shares) at Dec. 31, 2010 |  | 188,901,379 |  |  |  |
Net income (loss) | 213,026 |  | 0 | 213,026 | 0 |
Other comprehensive loss | (15,740) |  | 0 | 0 | (15,740) |
Dividends declared on preferred stocks | (685) |  | 0 | (685) | 0 |
Dividends declared on common stock | (123,657) |  | 0 | (123,657) | 0 |
Stock-based compensation |  | 423,591 |  |  |  |
Stock-based compensation | 10,588 | 424 | 10,164 | 0 | 0 |
Tax benefit (deficit) on stock-based compensation | (909) |  | (909) | 0 | 0 |
Issuance of common stock |  | 7,515 |  |  |  |
Issuance of common stock | 142 | 7 | 135 | 0 | 0 |
Balance at Dec. 31, 2011 | 2,760,567 | 189,332 | 1,035,739 | 1,586,123 | (47,001) | (3,626)
Treasury stock (in shares) at Dec. 31, 2011 | (538,921) |  |  |  |  | (538,921)
Balance (in shares) at Dec. 31, 2011 | 189,332,485 | 189,332,485 |  |  |  |
Net income (loss) | (754) |  | 0 | (754) | 0 |
Other comprehensive loss | (1,720) |  | 0 | 0 | (1,720) |
Dividends declared on preferred stocks | (685) |  | 0 | (685) | 0 |
Dividends declared on common stock | (127,538) |  | 0 | (127,538) | 0 |
Stock-based compensation |  | 25,743 |  |  |  |
Stock-based compensation | 5,120 | 26 | 5,094 | 0 | 0 |
Tax benefit (deficit) on stock-based compensation | (1,958) |  | (1,958) | 0 | 0 |
Issuance of common stock |  | 11,222 |  |  |  |
Issuance of common stock | 216 | 11 | 205 | 0 | 0 |
Balance at Dec. 31, 2012 | $ 2,633,248 | $ 189,369 | $ 1,039,080 | $ 1,457,146 | $ (48,721) | $ (3,626)
Treasury stock (in shares) at Dec. 31, 2012 | (538,921) |  |  |  |  | (538,921)
Balance (in shares) at Dec. 31, 2012 | 189,369,450 | 189,369,450 |  |  |  |

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