XML 56 R65.htm IDEA: XBRL DOCUMENT

Long-Term Incentive Employee Compensation (Details 1) (USD $)	6 Months Ended
	Jun. 30, 2012
Assumptions utilized to measure fair value
Dividend yield	1.60%
Expected volatility	34.10%
Expected life (in years)	6 years 10 months 24 days
Risk-free rates	1.40%
Grant date fair value	$ 6.71

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