CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Shares	Capital in Excess of Par Value	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Shares	Non-controlling Interest	Total
Balance at the beginning of the period at Dec. 31, 2013	$ 324	$ 2,392,585	$ 216,140	$ 4,304,664	$ (944,627)	$ 12,091	$ 5,981,177
Balance (in shares) at Dec. 31, 2013	323,711
Increase (Decrease) in Equity
Net income (loss)				220,411		1,213	221,624
Dividends to shareholders				(41,781)			(41,781)
Redemption of subsidiary preferred stock				(1,688)			(1,688)
Repurchase of treasury shares					(250,037)		(250,037)
Other comprehensive income (loss), net of tax			(83,918)			(624)	(84,542)
Issuance of common shares for stock options exercised	$ 3	30,237					$ 30,240
Issuance of common shares for stock options exercised (in shares)	3,034						3,000
Share-based compensation		28,141					$ 28,141
Other	$ 1	(7,582)				(2,319)	(9,900)
Other (in shares)	1,485
Balance at the end of the period at Sep. 30, 2014	$ 328	2,443,381	132,222	4,481,606	(1,194,664)	10,361	5,873,234
Balance (in shares) at Sep. 30, 2014	328,230
Balance at the beginning of the period at Dec. 31, 2014	$ 328	2,452,261	77,522	3,573,172	(1,194,664)	10,170	4,918,789
Balance (in shares) at Dec. 31, 2014	328,196
Increase (Decrease) in Equity
Net income (loss)				(209,021)		(453)	(209,474)
Dividends to shareholders				(52,489)			(52,489)
Repurchase of treasury shares					(78,399)		(78,399)
Other comprehensive income (loss), net of tax			(99,085)			(1,194)	(100,279)
Issuance of common shares for stock options exercised		1,198					$ 1,198
Issuance of common shares for stock options exercised (in shares)	130						100
Share-based compensation		39,024					$ 39,024
Other	$ 3	(7,537)				563	(6,971)
Other (in shares)	2,269
Balance at the end of the period at Sep. 30, 2015	$ 331	$ 2,484,946	$ (21,563)	$ 3,311,662	$ (1,273,063)	$ 9,086	$ 4,511,399
Balance (in shares) at Sep. 30, 2015	330,595