OTHER COMPREHENSIVE INCOME (Amounts Reclassified from Accumulated Other Comprehensive Income to Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (35,782)	$ (32,197)	$ (100,509)	$ (98,165)
Other nonoperating expense	5,787	359	3,818	5,954
Benefit from income taxes	56,984	53,472	130,530	111,764
Total	199,788	215,713	469,962	476,569
Reclassification From AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	2,045	343	6,423	1,025
Interest Rate Hedge Losses [Member] | Reclassification From AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	473	78	1,810	229
Benefit from income taxes	(123)	(21)	(472)	(60)
Total	350	57	1,338	169
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	2,294	386	6,881	1,159
Benefit from income taxes	(599)	(100)	(1,796)	(303)
Total	$ 1,695	$ 286	$ 5,085	$ 856