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Earning Per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Common Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
| Quarter Ended March 31,
| 2019 |  | 2018
| (In thousands, except per share data)
Net income | $ | 23,470 |  | $ | 16,917
Less: Dividends on preferred stock |  |  |  |  |
Non-convertible preferred stock (Series A, B, and D) |  | (1,628) |  |  | (1,627)
Convertible preferred stock (Series C) |  | - |  |  | (1,838)
Income available to common shareholders | $ | 21,842 |  | $ | 13,452
Effect of assumed conversion of the convertible preferred stock |  | - |  |  | 1,838
Income available to common shareholders assuming conversion | $ | 21,842 |  | $ | 15,290
Weighted average common shares and share equivalents: |  |  |  |  |
Average common shares outstanding |  | 51,305 |  |  | 43,955
Effect of dilutive securities: |  |  |  |  |
Average potential common shares-options |  | 321 |  |  | 28
Average potential common shares-assuming conversion of convertible preferred stock |  | - |  |  | 7,138
Total weighted average common shares outstanding and equivalents |  | 51,626 |  |  | 51,121
Earnings per common share - basic | $ | 0.43 |  | $ | 0.31
Earnings per common share - diluted | $ | 0.42 |  | $ | 0.30

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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