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Net Income Per Common Share Data (Details 1) (Stock options [Member])
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3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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Stock options [Member]
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| Schedule of equivalent shares that were excluded from the calculation of diluted net income per share because their effect would have been anti-dilutive | ||||
| Antidilutive equity awards | 132,850 | 132,850 | 2,054,748 | |