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SHARE-BASED COMPENSATION PLANS (restricted stock units, restricted shares and performance share awards) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restricted stock units [Member]      
Changes in share-based compensation awards (in thousands)      
Outstanding, beginning of year 195 109 139
Granted 611 110 16
Vested (93) (22) (43)
Forfeited (49) (2) (3)
Outstanding, end of year 664 195 109
Weighted-average grant date fair value      
Outstanding, beginning of year $ 45.41 $ 38.31 $ 37.99
Granted 44.73 52.32 73.27
Vested 49.31 48.14 43.18
Forfeited 45.40 74.96 57.18
Outstanding, end of year $ 44.35 $ 45.41 $ 38.31
Additional disclosures      
Weighted-average remaining contractual term, outstanding, end of year 2 years 3 months 18 days    
Fair value, awards vested $ 4,374 $ 1,619 $ 3,161
Restricted stock units classified as liabilities [Member]      
Changes in share-based compensation awards (in thousands)      
Outstanding, end of year 15    
Additional disclosures      
Aggregate intrinsic value, outstanding, end of year $ 710    
Weighted-average remaining contractual term, outstanding, end of year 9 months    
Fair value per unit, end of year $ 47.00    
Cash payments to settle restricted stock units $ 263 $ 78 $ 421
Restricted shares [Member]      
Changes in share-based compensation awards (in thousands)      
Outstanding, beginning of year 168 181 220
Granted   77 68
Vested (117) (76) (99)
Forfeited (25) (14) (8)
Outstanding, end of year 26 168 181
Weighted-average grant date fair value      
Outstanding, beginning of year $ 66.02 $ 65.33 $ 56.43
Granted   71.29 74.84
Vested 63.15 69.73 52.41
Forfeited 73.62 66.24 61.37
Outstanding, end of year $ 71.61 $ 66.02 $ 65.33
Additional disclosures      
Weighted-average remaining contractual term, outstanding, end of year 1 year    
Fair value, awards vested $ 5,608 $ 5,375 $ 7,452
Performance share awards [Member]      
Assumptions, Monte Carlo simulation model      
Risk-free interest rate 2.30% 2.40% 1.40%
Dividend yield 3.10% 1.60% 1.70%
Expected volatility 26.80% 21.60% 21.90%
Changes in share-based compensation awards (in thousands)      
Outstanding, beginning of year 250 255 236
Granted [1] 151 91 83
Vested (118) (45) (60)
Forfeited (38) (48) (9)
Adjustment for performance results achieved [2] 7 (3) 5
Outstanding, end of year 252 250 255
Weighted-average grant date fair value      
Outstanding, beginning of year $ 67.54 $ 63.42 $ 55.15
Granted 41.79 74.49 75.31
Vested 59.67 67.10 50.17
Forfeited 54.42 59.32 64.85
Adjustment for performance results achieved 54.42 67.11 50.34
Outstanding, end of year $ 57.64 $ 67.54 $ 63.42
Additional disclosures      
Weighted-average remaining contractual term, outstanding, end of year 1 year 6 months    
[1] Reflects awards granted assuming achievement of performance goals at target.
[2] Reflects the difference between the awards earned at the end of the performance period and the target number of shares.