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 year at Dec. 31, 2016		$ 195,056	$ 916,799	$ 5,729,596	$ (628,212)	$ (1,296,560)
Foreign currency translation (loss) gain, net of income taxes					194,094		$ 194,094
Net income (loss) for the period				(25,000)			(25,000)	[1]
Restricted stock transactions and other			(26,553)
Cash dividends				(129,421)
Retirement and postretirement benefit plans, net of income taxes					7,169		7,169
Sale of stock under employee stock purchase plan						145
Stock-based compensation			20,767
Other			(77)
Deferred loss on interest rate hedges reclassified to interest expense, net of income taxes					1,445		1,445
Awarded restricted stock, net of forfeitures						20,886
Balance at end of period at Sep. 30, 2017		195,056	910,936	5,575,175	(425,504)	(1,275,529)	4,980,134
Balance at beginning of year at Dec. 31, 2017		195,056	917,665	5,245,242	(462,243)	(1,275,529)	4,620,191
Exercise of stock options, inlcuding income tax benefits		9	(175)
Foreign currency translation (loss) gain, net of income taxes					(53,805)		(53,805)
Net income (loss) for the period				307,715			307,715
Reclassification of certain tax effects from accumulated other comprehensive loss to retained earnings				30,237	(30,237)		(30,237)
Other					(3,737)		(3,737)
Restricted stock transactions and other			(32,766)
Cash dividends				(129,780)
Retirement and postretirement benefit plans, net of income taxes					10,498		10,498
Stock-based compensation			20,655
Deferred loss on interest rate hedges reclassified to interest expense, net of income taxes					1,756		1,756
Awarded restricted stock, net of forfeitures						26,367
Balance at end of period at Sep. 30, 2018		$ 195,065	$ 905,379	$ 5,453,414	$ (537,768)	$ (1,249,162)	$ 4,766,928

[1] Reclassified to conform to current presentation (see Note B).