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Earnings Per Share | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Earnings Per Share | (17) Earnings Per Share The following is a reconciliation of basic and diluted earnings per share for the years presented in the consolidated statements of income:
| Years ended December 31, |
| 2015 |  |  | 2014 |  |  | 2013 |
(In thousands, except per share data) | Net income |  |  | Weighted average shares |  |  | Per share amount |  |  | Net income |  |  | Weighted average shares |  |  | Per share amount |  |  | Net income |  |  | Weighted average shares |  |  | Per share amount |
Basic earnings per share |  | $ | 76,425 |  |  | 43,836 |  |  | $ | 1.74 |  |  | $ | 75,074 |  |  |  | 43,877 |  |  | $ | 1.71 |  |  | $ | 61,747 |  |  |  | 41,930 |  |  | $ | 1.47 |
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation |  |  |  |  |  | 553 |  |  |  |  |  |  |  |  |  |  |  | 518 |  |  |  |  |  |  |  |  |  |  |  | 420 |  |  |  |  |
Diluted earnings per share |  | $ | 76,425 |  |  | 44,389 |  |  | $ | 1.72 |  |  | $ | 75,074 |  |  |  | 44,395 |  |  | $ | 1.69 |  |  | $ | 61,747 |  |  |  | 42,350 |  |  | $ | 1.46 |
There were approximately thirty thousand, 0.5 million, and 1.0 million weighted average stock options for the years ended December 31, 2015, 2014, and 2013, respectively, that were not considered in the calculation of diluted earnings per share since the stock options' exercise prices were greater than the average market price during these periods.

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