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Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Total | Common stock | Retained Earnings | Accumulated other comprehensive loss
--- | --- | --- | --- | ---
Balance at Dec. 31, 2012 | $ 1,593,865 | $ 1,403,484 | $ 216,804 | $ (26,423)
Balance (in shares) at Dec. 31, 2012 |  | 97,928,000 |  |
Increase (decrease) in stockholders' equity |  |  |  |
Net income for common stock | 33,679 |  | 33,679 |
Other comprehensive income, net of taxes | (61) |  |  | (61)
Issuance of common stock, net | 10,216 | 10,216 |  |
Issuance of common stock, net (in shares) |  | 543,000 |  |
Common stock dividends ($0.31 per share) | (30,434) |  | (30,434) |
Balance at Mar. 31, 2013 | 1,607,265 | 1,413,700 | 220,049 | (26,484)
Balance (in shares) at Mar. 31, 2013 |  | 98,471,000 |  |
Balance at Dec. 31, 2013 | 1,727,070 | 1,488,126 | 255,694 | (16,750)
Balance (in shares) at Dec. 31, 2013 | 101,259,800 | 101,260,000 |  |
Increase (decrease) in stockholders' equity |  |  |  |
Net income for common stock | 45,927 |  | 45,927 |
Other comprehensive income, net of taxes | 1,167 |  |  | 1,167
Issuance of common stock, net | 3,212 | 3,212 |  |
Issuance of common stock, net (in shares) |  | 218,000 |  |
Common stock dividends ($0.31 per share) | (31,448) |  | (31,448) |
Balance at Mar. 31, 2014 | $ 1,745,928 | $ 1,491,338 | $ 270,173 | $ (15,583)
Balance (in shares) at Mar. 31, 2014 | 101,477,616 | 101,478,000 |  |

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