INCENTIVE PLANS (Summary of Activity for Nonvested Performance/Restricted Share Units) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target Number of Shares, Beginning Balance	220,988
Target Number of Shares, Granted	116,825
Target Number of Shares, Vested	(109,880)
Target Number of Shares, Canceled/forfeited	(8,032)
Target Number of Shares, Ending Balance	219,901	220,988
Weighted-average Grant Date Fair Value, Beginning Balance	$ 148.93
Weighted-average Grant Date Fair Value, Granted	185.31	$ 164.38	$ 133.95
Weighted-average Grant Date Fair Value, Vested	133.95
Weighted-average Grant Date Fair Value, Canceled/forfeited	163.95
Weighted-average Grant Date Fair Value, Ending Balance	$ 160.48	$ 148.93
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target Number of Shares, Beginning Balance	205,280
Target Number of Shares, Granted	76,036
Target Number of Shares, Vested	(86,326)
Target Number of Shares, Canceled/forfeited	(9,502)
Target Number of Shares, Ending Balance	185,488	205,280
Weighted-average Grant Date Fair Value, Beginning Balance	$ 135.26
Weighted-average Grant Date Fair Value, Granted	184.49	$ 164.38	$ 133.95
Weighted-average Grant Date Fair Value, Vested	117.27
Weighted-average Grant Date Fair Value, Canceled/forfeited	162.76
Weighted-average Grant Date Fair Value, Ending Balance	$ 162.40	$ 135.26