Stock-Based Compensation (Details 3)	9 Months Ended
Sep. 30, 2012
Dividend yield	0.60%
Expected volatility	58.65%
Risk-free interest rate	1.69%
Expected contract life (in years)	5 years 10 months

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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