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INCENTIVE PLANS (Weighted-Average Fair Value And Weighted-Average Assumptions Used In Estimating Fair Value of Grants) (Details) - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
INCENTIVE PLANS [Abstract]      
Fair value $ 29.20 $ 25.17 $ 21.94
Risk-free interest rate 1.66% 1.85% 2.40%
Dividend yield 1.39% 1.70% 1.64%
Volatility 30.42% 33.00% 33.00%
Expected term 9 years 8 years 8 years