Other (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) contract option_plan	Mar. 31, 2015 USD ($) contract option_plan
Other general expense (income ) - net
Provisions for environmental matters - net	$ 18,029	$ 1,050
Gain on disposition of assets	(475)	(2,723)
Total	17,554	(1,673)
Other expense (income) - net
Dividend and royalty income	(1,166)	(1,081)
Net expense from banking activities	2,263	2,967
Foreign currency transaction related losses	1,690	1,138
Other income	(4,880)	(5,497)
Other expense	2,319	2,228
Total	$ 226	$ (245)
Number of foreign currency options outstanding | option_plan	0	0
Number of foreign forward contracts outstanding | contract	0	0