Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
The table below presents a reconciliation between basic and diluted weighted average shares outstanding, net income available to common shareholders and basic and diluted income per share for the three and six months ended June 30, 2016 and 2015: | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Six Months Ended | | | June 30, | | June 30, | (In thousands, except per share amounts) | | 2016 | | 2015 | | 2016 | | 2015 | NUMERATOR | | | | | | | | | Net income | | $ | 15,916 |
| | $ | 13,350 |
| | $ | 25,105 |
| | $ | 22,918 |
| Preferred stock dividends | | (1,219 | ) | | (1,219 | ) | | (2,438 | ) | | (2,438 | ) | Net income to common shareholders | | 14,697 |
| | 12,131 |
| | 22,667 |
| | 20,480 |
| Interest on 3.25% convertible senior subordinated notes due 2017 | | 390 |
| | 373 |
| | 774 |
| | 745 |
| Interest on 3.00% convertible senior subordinated notes due 2018 | | 526 |
| | 502 |
| | 1,043 |
| | 1,005 |
| Diluted income available to common shareholders | | $ | 15,613 |
| | $ | 13,006 |
| | $ | 24,484 |
| | $ | 22,230 |
| DENOMINATOR | | | | | | | | | Basic weighted average shares outstanding | | 24,669 |
| | 24,531 |
| | 24,663 |
| | 24,523 |
| Effect of dilutive securities: | | | | | | | | | Stock option awards | | 185 |
| | 243 |
| | 177 |
| | 233 |
| Deferred compensation awards | | 138 |
| | 164 |
| | 130 |
| | 161 |
| 3.25% convertible senior subordinated notes due 2017 | | 2,416 |
| | 2,416 |
| | 2,416 |
| | 2,416 |
| 3.00% convertible senior subordinated notes due 2018 | | 2,669 |
| | 2,669 |
| | 2,669 |
| | 2,669 |
| Diluted weighted average shares outstanding - adjusted for assumed conversions | | 30,077 |
| | 30,023 |
| | 30,055 |
| | 30,002 |
| Earnings per common share: | | | | | | | | | Basic | | $ | 0.60 |
| | $ | 0.49 |
| | $ | 0.92 |
| | $ | 0.84 |
| Diluted | | $ | 0.52 |
| | $ | 0.43 |
| | $ | 0.81 |
| | $ | 0.74 |
| Anti-dilutive equity awards not included in the calculation of diluted earnings per common share | | 1,261 |
| | 1,486 |
| | 1,301 |
| | 1,428 |
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