OTHER COMPREHENSIVE INCOME (Amounts Reclassified from Accumulated Other Comprehensive Income to Earnings) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense		$ (33,126)	$ (37,800)	$ (100,192)	$ (183,931)
Cost of revenues		703,931	747,170	1,958,581	1,961,292
Selling, administrative and general expenses		76,311	71,390	235,460	207,350
Benefit from income taxes		52,062	45,386	116,026	51,177
Net earnings		139,765	123,805	282,439	132,289
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net earnings		327	4,165	963	14,868
Reclassification Adjustment for Cash Flow Hedge Losses [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense		507	467	1,490	9,282
Benefit from income taxes		(200)	(185)	(588)	(3,675)
Net earnings	[1]	307	282	902	5,607
Amortization of Pension and Postretirement Plan Actuarial Loss and Prior Service Cost [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of revenues		27	5,242	82	12,417
Selling, administrative and general expenses		6	1,136	18	2,796
Benefit from income taxes		(13)	(2,495)	(39)	(5,952)
Net earnings	[2]	$ 20	$ 3,883	$ 61	$ 9,261

[1] Total for nine months ended September 30, 2015 includes the acceleration of a proportional amount of deferred losses on interest rate derivatives (see Note 6) referable to debt purchases (see Note 7).

[2] Totals for the three and nine months ended September 30, 2015 include a one-time settlement loss resulting from a lump sum payment to a former employee (see Note 10).