CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Cumulative Preferred Stock [Member]	Common Stock [Member]	Capital In Excess Of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at beginning of year at Dec. 31, 2013		$ 194,920	$ 902,633	$ 8,058,792	$ 172,119	$ (732,734)
Exercise of stock options, including income tax benefits		117	(11,354)
Foreign currency translation loss, net of income taxes					(195,374)		$ (195,374)
Purchase of treasury shares						(375,000)
Net income (loss) for the period				530,373			530,373
Other			(26)
Restricted stock transactions and other			(27,977)
Cash dividends				(174,248)
Retirement and postretirement benefit plans, net of income taxes					3,996		3,996
Sale of stock under employee stock purchase plans						345
Stock-based compensation			33,291
Deferred loss on interest rate hedges reclassified to interest expense, net of income taxes					1,450		1,450
Awarded restricted stock, net of forfeitures						21,185
Balance at end of year at Sep. 30, 2014		195,037	896,567	8,414,917	(17,809)	(1,086,204)	8,402,508
Balance at beginning of year at Dec. 31, 2014		195,040	906,741	8,728,032	(170,255)	(1,086,124)	8,573,434	[1]
Exercise of stock options, including income tax benefits		16	(73)
Foreign currency translation loss, net of income taxes					(462,054)		(462,054)
Purchase of treasury shares						(250,000)
Net income (loss) for the period				(1,683,701)			(1,683,701)
Other			(92)
Restricted stock transactions and other			(38,260)
Cash dividends				(184,789)
Retirement and postretirement benefit plans, net of income taxes					9,105		9,105
Sale of stock under employee stock purchase plans						322
Stock-based compensation			33,925
Deferred loss on interest rate hedges reclassified to interest expense, net of income taxes					1,445		1,445
Awarded restricted stock, net of forfeitures						29,176
Balance at end of year at Sep. 30, 2015		$ 195,056	$ 902,241	$ 6,859,542	$ (621,759)	$ (1,306,626)	$ 6,028,454

[1] Reclassified to conform to current presentation.