INCENTIVE PLANS (Summary of Activity for Nonvested Performance/Restricted Share Units) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target Number of Shares, Beginning Balance	219,901
Target Number of Shares, Granted	126,010
Target Number of Shares, Vested	(105,606)
Target Number of Shares, Canceled/forfeited	(12,833)
Target Number of Shares, Ending Balance	227,472	219,901
Weighted-average Grant Date Fair Value, Beginning Balance	$ 160.48
Weighted-average Grant Date Fair Value, Granted	175.46	$ 185.31	$ 164.38
Weighted-average Grant Date Fair Value, Vested	164.41
Weighted-average Grant Date Fair Value, Canceled/forfeited	179.09
Weighted-average Grant Date Fair Value, Ending Balance	$ 180.13	$ 160.48
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target Number of Shares, Beginning Balance	185,488
Target Number of Shares, Granted	133,902
Target Number of Shares, Vested	(63,722)
Target Number of Shares, Canceled/forfeited	(18,995)
Target Number of Shares, Ending Balance	236,673	185,488
Weighted-average Grant Date Fair Value, Beginning Balance	$ 162.40
Weighted-average Grant Date Fair Value, Granted	175.46	$ 184.49	$ 164.38
Weighted-average Grant Date Fair Value, Vested	137.56
Weighted-average Grant Date Fair Value, Canceled/forfeited	177.28
Weighted-average Grant Date Fair Value, Ending Balance	$ 175.29	$ 162.40