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 Loss [Member]	Treasury Stock [Member]	Total
Balance at beginning of period at Dec. 31, 2014		$ 195,040	$ 906,741	$ 8,728,032	$ (170,255)	$ (1,086,124)
Exercise of stock options, including income tax benefits		16	(73)
Foreign currency translation gain (loss), net of income taxes					(462,054)		$ (462,054)
Purchase of treasury shares						(250,000)
Net loss for the period				(1,683,701)			(1,683,701)
Restricted stock transactions and other			(38,260)
Cash dividends				(184,789)
Retirement and postretirement benefit plans					9,105		9,105
Sale of stock under employee stock purchase plans						322
Stock-based compensation			33,925
Other			(92)
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 period at Sep. 30, 2015		195,056	902,241	6,859,542	(621,759)	(1,306,626)	6,028,454
Balance at beginning of period at Dec. 31, 2015		195,056	910,074	6,212,201	(704,542)	(1,306,061)	5,306,728
Foreign currency translation gain (loss), net of income taxes					124,522		124,522
Net loss for the period				(212,048)			(212,048)
Restricted stock transactions and other			(10,078)
Cash dividends				(163,586)
Retirement and postretirement benefit plans					7,544		7,544
Sale of stock under employee stock purchase plans						389
Stock-based compensation			21,918
Other			(239)
Deferred loss on interest rate hedges, reclassified to interest expense, net of income taxes					1,445		1,445
Awarded restricted stock, net of forfeitures						8,993
Balance at end of period at Sep. 30, 2016		$ 195,056	$ 921,675	$ 5,836,567	$ (571,031)	$ (1,296,679)	$ 5,085,588