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Earning Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The calculation of earnings (loss) per common share for the years ended December 31, 2016, 2015 and 2014 is as follows:
| Year Ended December 31,
| 2016 |  | 2015 |  |  | 2014
| (In thousands, except per share data)
Net income (loss) | $ | 59,186 |  | $ | (2,504) |  |  | $ | 85,181
Less: Dividends on preferred stock |  |  |  |  |  |  |  |  |
Non-convertible preferred stock (Series A, B, and D) |  | (6,512) |  |  | (6,512) |  |  |  | (6,512)
Convertible preferred stock (Series C) |  | (7,350) |  |  | (7,350) |  |  |  | (7,350)
Income (loss) available to common shareholders | $ | 45,324 |  | $ | (16,366) |  |  | $ | 71,319
Effect of assumed conversion of the convertible ' ' preferred stock |  | 7,350 |  |  | 7,350 |  |  |  | 7,350
Income (loss) available to common shareholders assuming conversion | $ | 52,674 |  | $ | (9,016) |  |  | $ | 78,669
Weighted average common shares and share equivalents: |  |  |  |  |  |  |  |  |
Average common shares outstanding |  | 43,913 |  |  | 44,231 |  |  |  | 45,024
Effect of dilutive securities: |  |  |  |  |  |  |  |  |
Average potential common shares-options |  | 37 |  |  | 68 |  |  |  | 155
Average potential common shares-assuming ' ' conversion of convertible preferred stock |  | 7,138 |  |  | 7,156 |  |  |  | 7,147
Total weighted average common shares ' 'outstanding and equivalents |  | 51,088 |  |  | 51,455 |  |  |  | 52,326
Earnings (loss) per common share - basic | $ | 1.03 |  | $ | (0.37) |  |  | $ | 1.58
Earnings (loss) per common share - diluted | $ | 1.03 |  | $ | (0.37) |  |  | $ | 1.50

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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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