XML 20 R25.htm IDEA: XBRL DOCUMENT

Stock Based Compensation (Valuation Assumptions) (Details)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Dividend Rate	0.00%	0.00%
Volatility Rate		22.98%
Risk Free Interest Rate		2.21%
Expected Life		5 years
Minimum [Member]
Volatility Rate	44.27%
Risk Free Interest Rate	1.33%
Expected Life	5 years 6 months
Maximum [Member]
Volatility Rate	45.00%
Risk Free Interest Rate	1.92%
Expected Life	6 years

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.

+ References+ Details