CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, unless otherwise specified	Common Shares	Capital in Excess of Par Value	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Shares	Non-controlling Interest	Total
Balance 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)				49,919		573	50,492
Dividends to shareholders				(11,893)			(11,893)
Other comprehensive income (loss), net of tax			(55,674)			(481)	(56,155)
Issuance of common shares for stock options exercised	1	4,930					4,931
Issuance of common shares for stock options exercised (in shares)	517						500
Share-based compensation		10,685					10,685
Other	1	(6,586)				(1,383)	(7,968)
Other (in shares)	1,544
Balance at Mar. 31, 2014	326	2,401,614	160,466	4,342,690	(944,627)	10,800	5,971,269
Balance (in shares) at Mar. 31, 2014	325,772
Balance 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)				123,634		(89)	123,545
Dividends to shareholders				(17,470)			(17,470)
Other comprehensive income (loss), net of tax			(62,754)			(880)	(63,634)
Issuance of common shares for stock options exercised		182					182
Issuance of common shares for stock options exercised (in shares)	20						20
Share-based compensation		13,691					13,691
Other	2	(7,091)				(252)	(7,341)
Other (in shares)	1,341
Balance at Mar. 31, 2015	$ 330	$ 2,459,043	$ 14,768	$ 3,679,336	$ (1,194,664)	$ 8,949	$ 4,967,762
Balance (in shares) at Mar. 31, 2015	329,557