CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net sales	$ 567,646	$ 645,166	$ 1,710,786	$ 1,967,806
Cost of goods sold	367,834	446,272	1,118,945	1,322,741
Gross profit	199,812	198,894	591,841	645,065
Selling, general & administrative expenses	117,983	128,299	352,290	385,945
Restructuring, Settlement and Impairment Provisions	0	18,285	0	19,524
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	0	(136,331)	0	(136,331)
Deconsolidation, (Gain) Loss, Amount	0	0	34,348	0
Operating income (loss)	81,829	(84,021)	205,203	103,265
Other income (expense):
Interest income	360	692	1,225	2,023
Equity earnings in affiliates	619	310	2,084	2,138
Other income	1,303	296	2,552	3,223
Interest expense	(3,815)	(5,803)	(11,828)	(12,034)
Total other income (expense)	(1,533)	(4,505)	(5,967)	(4,650)
Income (loss) before income taxes	80,296	(88,526)	199,236	98,615
Income taxes	20,257	(28,045)	54,264	19,902
Net income (loss) including non-controlling interests	60,039	(60,481)	144,972	78,713
Non-controlling interests in subsidiaries’ loss	(10)	(15)	(32)	(73)
Net income (loss)	$ 60,049	$ (60,466)	$ 145,004	$ 78,786
Basic earnings (loss) per share (in dollars per share)	$ 0.90	$ (0.82)	$ 2.13	$ 1.05
Diluted earnings (loss) per share (in dollars per share)	0.89	(0.82)	2.11	1.04
Cash dividends declared per share (in dollars per share)	$ 0.32	$ 0.29	$ 0.96	$ 0.87