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					92,884		$ 92,884
Net income for the period				40,893			40,893	[1]
Restricted stock transactions and other			(26,483)
Cash dividends				(86,278)
Retirement and postretirement benefit plans, net of income taxes					4,773		4,773
Sale of stock under employee stock purchase plan						145
Stock-based compensation			13,302
Other			(76)
Deferred loss on interest rate hedges reclassified to interest expense, net of income taxes					963		963
Awarded restricted stock, net of forfeitures						20,886
Balance at end of period at Jun. 30, 2017		195,056	903,542	5,684,211	(529,592)	(1,275,529)	4,977,688
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					(87,185)		(87,185)
Net income for the period				213,771			213,771
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				(86,518)
Retirement and postretirement benefit plans, net of income taxes					7,108		7,108
Stock-based compensation			13,402
Deferred loss on interest rate hedges reclassified to interest expense, net of income taxes					1,171		1,171
Awarded restricted stock, net of forfeitures						26,367
Balance at end of period at Jun. 30, 2018		$ 195,065	$ 898,126	$ 5,402,732	$ (575,123)	$ (1,249,162)	$ 4,671,638

[1] Reclassified to conform to current presentation (see Notes A and B).