STOCK COMPENSATION PLANS (Purcahse rights assumption) (Details) (Employee Stock Purchase Plan [Member])	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Dividend Yield (in hundredths)	3.42%	2.79%	3.90%
Average Expected Volatility (in hundredths)	13.99%	20.02%	28.89%
Average Risk-Free Rate of Return (in hundredths)	0.11%	0.22%	0.22%
Weighted-Average Fair Value	2.82	2.55	2.54