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Earnings Per Common Share | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Common Share | Earnings Per Common Share Earnings per common share are calculated utilizing the two-class method. Basic earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding. Diluted earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding adjusted for the dilutive effect of common stock awards (outstanding stock options and unvested restricted stock awards) and common stock warrants. Presented below are the calculations for basic and diluted earnings per common share.
| For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
| (In Thousands, except per share data)
Net income | $ | 89,192 |  |  | $ | 57,983 |  |  | $ | 158,648 |  |  | $ | 114,253 |
Preferred stock dividends | (2,329 | ) |  | (2,339 | ) |  | (4,668 | ) |  | (4,669 | )
Net income available to common equity | $ | 86,863 |  |  | $ | 55,644 |  |  | $ | 153,980 |  |  | $ | 109,584 |
Common shareholder dividends | (25,977 | ) |  | (18,326 | ) |  | (51,549 | ) |  | (36,577 | )
Unvested share-based payment awards | (130 | ) |  | (110 | ) |  | (269 | ) |  | (227 | )
Undistributed earnings | $ | 60,756 |  |  | $ | 37,208 |  |  | $ | 102,162 |  |  | $ | 72,780 |
Undistributed earnings allocated to common shareholders | 60,446 |  |  | 36,980 |  |  | 101,677 |  |  | 72,273 |
Undistributed earnings allocated to unvested share-based payment awards | 310 |  |  | 228 |  |  | 485 |  |  | 507 |
Undistributed earnings | $ | 60,756 |  |  | $ | 37,208 |  |  | $ | 102,162 |  |  | $ | 72,780 |
Basic |  |  |  |  |  |  |
Distributed earnings to common shareholders | $ | 25,977 |  |  | $ | 18,326 |  |  | $ | 51,549 |  |  | $ | 36,577 |
Undistributed earnings allocated to common shareholders | 60,446 |  |  | 36,980 |  |  | 101,677 |  |  | 72,273 |
Total common shareholders earnings, basic | $ | 86,423 |  |  | $ | 55,306 |  |  | $ | 153,226 |  |  | $ | 108,850 |
Diluted |  |  |  |  |  |  |
Distributed earnings to common shareholders | $ | 25,977 |  |  | $ | 18,326 |  |  | $ | 51,549 |  |  | $ | 36,577 |
Undistributed earnings allocated to common shareholders | 60,446 |  |  | 36,980 |  |  | 101,677 |  |  | 72,273 |
Total common shareholders earnings, diluted | $ | 86,423 |  |  | $ | 55,306 |  |  | $ | 153,226 |  |  | $ | 108,850 |
Weighted average common shares outstanding | 170,633 |  |  | 151,573 |  |  | 167,096 |  |  | 151,196 |
Effect of dilutive common stock awards | 2,146 |  |  | 1,958 |  |  | 2,080 |  |  | 2,155 |
Effect of dilutive common stock warrants | 630 |  |  | 771 |  |  | 744 |  |  | 796 |
Diluted weighted average common shares outstanding | 173,409 |  |  | 154,302 |  |  | 169,920 |  |  | 154,147 |
Basic earnings per common share | $ | 0.51 |  |  | $ | 0.36 |  |  | $ | 0.92 |  |  | $ | 0.72 |
Diluted earnings per common share | $ | 0.50 |  |  | $ | 0.36 |  |  | $ | 0.90 |  |  | $ | 0.71 |
Anti-dilutive common stock options of approximately 1.5 million and 1 million for the three months ended June 30, 2018 and 2017, respectively, and 1.4 million and 900,000 for the six months ended June 30, 2018 and 2017, respectively, were excluded from the earnings per common share calculation.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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