SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Weighted-Average Common Shares Outstanding Assuming Dilution) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Weighted-average common shares outstanding	132,810	132,573	132,780	132,564
Dilutive effect of Stock-Only Stock Appreciation Rights	303	314	308	307
Dilutive effect of Other stock compensation plans	431	381	392	321
Weighted-average common shares outstanding, assuming dilution	133,544	133,268	133,480	133,192