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Equity (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Equity activity |  |  |  |
Beginning balance |  |  | $ 632,438 |
Net income | 18,273 | 12,903 | 35,277 | 25,879
Stock option and restricted common stock vesting |  |  | 1,449 | 1,508
Stock option exercise |  |  | 277 |
Reclassification adjustment | (9) | (8) | (18) | (17)
Preferred stock dividends |  |  | (1,636) |
Common stock dividends |  |  | (35,504) |
Other |  |  | (7) |
Ending balance | $ 632,276 |  | $ 632,276 |

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