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Earning Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The calculation of earnings per common share for the quarters and nine-month periods ended September 30, 2017 and 2016 is as follows:
| Quarter Ended September 30, |  | Nine-Month Period Ended September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| (In thousands, except per share data)
Net income | $ | 3,319 |  | $ | 15,120 |  | $ | 35,573 |  | $ | 43,630
Less: Dividends on preferred stock |  |  |  |  |  |  |  |  |  |  |
Non-convertible preferred stock (Series A, B, and D) |  | (1,627) |  |  | (1,627) |  |  | (4,883) |  |  | (4,883)
Convertible preferred stock (Series C) |  | (1,838) |  |  | (1,838) |  |  | (5,513) |  |  | (5,513)
(Loss) Income available to common shareholders | $ | (146) |  | $ | 11,655 |  | $ | 25,177 |  | $ | 33,234
Effect of assumed conversion of the convertible ' ' preferred stock |  | 1,838 |  |  | 1,838 |  |  | 5,513 |  |  | 5,513
Income available to common shareholders assuming conversion | $ | 1,692 |  | $ | 13,493 |  | $ | 30,690 |  | $ | 38,747
Weighted average common shares and share equivalents: |  |  |  |  |  |  |  |  |  |  |
Average common shares outstanding |  | 43,947 |  |  | 43,926 |  |  | 43,937 |  |  | 43,913
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Average potential common shares-options |  | 17 |  |  | 47 |  |  | 20 |  |  | 40
Average potential common shares-assuming ' ' conversion of convertible preferred stock |  | 7,138 |  |  | 7,138 |  |  | 7,138 |  |  | 7,138
Total weighted average common shares ' 'outstanding and equivalents |  | 51,102 |  |  | 51,111 |  |  | 51,095 |  |  | 51,091
Earnings per common share - basic | $ | - |  | $ | 0.27 |  | $ | 0.57 |  | $ | 0.76
Earnings per common share - diluted | $ | - |  | $ | 0.26 |  | $ | 0.56 |  | $ | 0.76

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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://www.xbrl.org/2003/role/presentationRef -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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