| **Earnings Per Share**            | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
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| **Earnings Per Share [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Earnings Per Share [Text Block]   | Note B. Earnings Per ShareEarnings per share is based on the weighted average number of outstanding common shares.  Basic earnings (loss) per share excludes the effect of dilutive securities and is computed by dividing Net income (loss) by the weighted average number of common shares outstanding for the period.  Diluted earnings (loss) per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock.For the three months ended March 31, 2016 and 2015, approximately 542 thousand and 654 thousand potential shares attributable to exercises under stock-based employee compensation plans were included in the calculation of diluted earnings per share.  For those same periods, approximately 180 thousand and 182 thousand potential shares attributable to exercises under stock-based employee compensation plans were not included in the calculation of diluted earnings per share because the effect would have been antidilutive. |

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No definition available.
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| - Definition
The entire disclosure for earnings per share.
+ References
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