| Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
Combined activity related to stock options granted under the Stock Plans during the periods presented was as follows:
| | At or for the Three Months Ended September 30, | | | At or for the Nine Months Ended September 30, | | | | 2012 | | | 2011 | | | 2012 | | | 2011 | | Options outstanding – beginning of period | | | 2,830,302 | | | | 3,079,040 | | | | 2,893,760 | | | | 3,213,007 | | Options granted | | | - | | | | - | | | | 24,440 | | | | 91,583 | | Options exercised | | | (253,182 | ) | | | (55,955 | ) | | | (339,693 | ) | | | (276,944 | ) | Options forfeited | | | (5,625 | ) | | | (10,312 | ) | | | (7,012 | ) | | | (14,873 | ) | Options outstanding – end of period | | | 2,571,495 | | | | 3,012,773 | | | | 2,571,495 | | | | 3,012,773 | | Remaining unrecognized compensation expense | | $ | 408 | | | $ | 628 | | | $ | 408 | | | $ | 628 | |
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| Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] |
The weighted average fair value per option at the date of grant for stock options granted was estimated as follows:
| | Nine Months Ended September 30, | | | | 2012 | | | 2011 | | Total options granted | | | 24,440 | | | | 91,583 | | Estimated fair value on date of grant | | $ | 4.09 | | | $ | 4.82 | | Pricing methodology utilized | | Black- Scholes | | | Black- Scholes | | Expected life (in years) | | | 6.53 | | | | 6.80 | | Interest rate | | | 1.21 | % | | | 2.59 | % | Volatility | | | 45.17 | | | | 42.35 | | Dividend yield | | | 4.04 | | | | 3.62 | |
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| Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
The following is a summary of activity related to the restricted stock awards granted under the 2004 Stock Incentive Plan during the periods indicated:
| | At or for the Three Months Ended September 30, | | | At or for the Nine Months Ended September 30, | | | | 2012 | | | 2011 | | | 2012 | | | 2011 | | Unvested allocated shares – beginning of period | | | 328,003 | | | | 324,454 | | | | 324,454 | | | | 309,783 | | Shares granted | | | - | | | | - | | | | 141,289 | | | | 126,304 | | Shares vested | | | - | | | | - | | | | (135,369 | ) | | | (109,649 | ) | Shares forfeited | | | - | | | | - | | | | (2,371 | ) | | | (1,984 | ) | Unvested allocated shares – end of period | | | 328,003 | | | | 324,454 | | | | 328,003 | | | | 324,454 | |
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