OTHER COMPREHENSIVE INCOME (Changes In AOCI Net Of Tax) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
AOCI, Net of Tax, Beginning Balance	$ (161,714)	$ (99,631)	$ (225,517)
Other comprehensive income (loss) before reclassifications	23,832	(69,051)	111,883
Amounts reclassified from AOCI	17,813	6,968	14,003
Other comprehensive income (loss)	41,645	(62,083)	125,886
AOCI, Net of Tax, Ending Balance	(120,069)	(161,714)	(99,631)
Reclassification Adjustment for Cash Flow Hedge Losses [Member]
AOCI, Net of Tax, Beginning Balance	(20,322)	(25,178)	(28,170)
Other comprehensive income (loss) before reclassifications	0	0	0
Amounts reclassified from AOCI	5,828	4,856	2,992
Other comprehensive income (loss)	5,828	4,856	2,992
AOCI, Net of Tax, Ending Balance	(14,494)	(20,322)	(25,178)
Amortization of Pension and Postretirement Plan Actuarial Loss and Prior Service Cost [Member]
AOCI, Net of Tax, Beginning Balance	(141,392)	(74,453)	(197,347)
Other comprehensive income (loss) before reclassifications	23,832	(69,051)	111,883
Amounts reclassified from AOCI	11,985	2,112	11,011
Other comprehensive income (loss)	35,817	(66,939)	122,894
AOCI, Net of Tax, Ending Balance	$ (105,575)	$ (141,392)	$ (74,453)