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STOCK-BASED COMPENSATION (Details) (USD $)	12 Months Ended
STOCK-BASED COMPENSATION (Details) (USD $)	Dec. 31, 2012
Dividend yield	3.20%
Risk-free interest rate	1.15%
Expected volatility	23.62%
Weighted average expected life	8 years
Weighted average per share fair value of options	$ 3.01

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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