Income Taxes (Principal Components Of The Company's Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets, Net [Abstract]
Accruals not yet tax deductible	$ 129,449	$ 120,817
Pension and postretirement benefit plan obligations	126,952	104,723
Stock compensation	20,111	21,089
Net operating loss carryforward	38,250	41,927
Valuation allowance	(20,659)	(25,462)
Other, net	47,039	38,465
Deferred tax assets, net	341,142	301,559
Deferred Tax Liabilities, Gross [Abstract]
Depreciation, tax in excess of book	(136,340)	(128,117)
Other	(2,419)	(5,691)
Deferred tax liabilities, net	(138,759)	(133,808)
Total	$ 202,383	$ 167,751