OTHER COMPREHENSIVE INCOME (Changes In AOCI Net Of Tax) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, Net of Tax, Beginning Balance	$ (99,631)	$ (225,517)	$ (216,844)
Other comprehensive income before reclassifications	(69,051)	111,883	(24,454)
Amounts reclassified from AOCI	6,968	14,003	15,781
Other comprehensive income (loss)	(62,083)	125,886	(8,673)
AOCI, Net of Tax, Ending Balance	(161,714)	(99,631)	(225,517)
Reclassification Adjustment for Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, Net of Tax, Beginning Balance	(25,178)	(28,170)	(31,986)
Other comprehensive income before reclassifications	0	0	0
Amounts reclassified from AOCI	4,856	2,992	3,816
Other comprehensive income (loss)	4,856	2,992	3,816
AOCI, Net of Tax, Ending Balance	(20,322)	(25,178)	(28,170)
Amortization of Pension and Postretirement Plan Actuarial Loss and Prior Service Cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, Net of Tax, Beginning Balance	(74,453)	(197,347)	(184,858)
Other comprehensive income before reclassifications	(69,051)	111,883	(24,454)
Amounts reclassified from AOCI	2,112	11,011	11,965
Other comprehensive income (loss)	(66,939)	122,894	(12,489)
AOCI, Net of Tax, Ending Balance	$ (141,392)	$ (74,453)	$ (197,347)