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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 income (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 | 122,503 |  | 122,503 |
Other comprehensive income (loss), net of taxes | (9,263) |  |  | (9,263)
Issuance of common stock, net | 40,099 | 40,099 |  |
Issuance of common stock, net (in shares) |  | 1,614,000 |  |
Common stock dividends ($0.93 per share) | (91,739) |  | (91,739) |
Balance at Sep. 30, 2013 | 1,655,465 | 1,443,583 | 247,568 | (35,686)
Balance (in shares) at Sep. 30, 2013 |  | 99,542,000 |  |
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 | 135,163 |  | 135,163 |
Other comprehensive income (loss), net of taxes | 2,756 |  |  | 2,756
Issuance of common stock, net | 31,130 | 31,130 |  |
Issuance of common stock, net (in shares) |  | 1,302,000 |  |
Common stock dividends ($0.93 per share) | (94,711) |  | (94,711) |
Balance at Sep. 30, 2014 | $ 1,801,408 | $ 1,519,256 | $ 296,146 | $ (13,994)
Balance (in shares) at Sep. 30, 2014 | 102,562,464 | 102,562,000 |  |

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