OTHER COMPREHENSIVE INCOME (Amounts Reclassified from Accumulated Other Comprehensive Income to Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (36,776)	$ (35,782)	$ (111,589)	$ (100,509)
Other nonoperating expense	3,152	5,787	17,288	3,818
Benefit from income taxes	51,770	56,984	169,692	130,530
Total	176,906	199,788	532,865	469,962
Reclassification From AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	1,599	2,045	4,785	6,423
Amortization of Interest Rate Hedges Losses [Member] | Reclassification From AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	493	473	1,461	1,810
Benefit from income taxes	(129)	(123)	(381)	(472)
Total	364	350	1,080	1,338
Amortization of Pension and Postretirement Plan Actuarial Loss and Prior Service Cost [Member] | Reclassification From AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating expense	1,671	2,294	5,014	6,881
Benefit from income taxes	(436)	(599)	(1,309)	(1,796)
Total	$ 1,235	$ 1,695	$ 3,705	$ 5,085