Other Assets (Schedule Of Other Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Cost	62,016	$ 62,016
Goodwill, Net	62,016	62,016	29,990
Total intangible assets	279,167	219,249
Intangible assets, Accumulated Amortization	(60,736)	(60,203)
Intangible assets, net	218,431	159,046
Available-for-sale investments	15,414	0
Cost-method investments	57,147
Notes receivable from affiliate	1,025	1,025
Turnaround costs	107,892	107,732
Turnaround costs, Accumulated Amortization	(56,493)	(37,276)
Turnaround costs, Net	51,399	70,456
Debt issuance costs, Cost	20,406	19,220
Debt issuance costs, Accumulated Amortization	(11,282)	(9,608)
Debt issuance costs, Net	9,124	9,612
Other, Costs	49,546	31,288
Other, Accumulated Amortization	(18,245)	(14,489)
Other, Net	31,301	16,799
Other assets, Cost	530,597	378,514
Other assets, Accumulated Amortization	(146,756)	(121,576)
Other assets, net	(383,841)	(256,938)
Total Deferred Charges and Other Assets, Noncurrent, Gross	251,430	159,265
Accumulated Amortization, Total Deferred Charges and Other Assets	(86,020)	(61,373)
Total Deferred Charges and Other Assets, NonCurrent, Net	165,410	97,892
Turnaround Costs [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Weighted Average Life	5 years
Debt Issuance Costs [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Weighted Average Life	13 years
Other, Net [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Weighted Average Life	3 years
Licenses and intellectual property [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, Cost	82,611	63,765
Intangible assets, Accumulated Amortization	(35,732)	(43,190)
Intangible assets, Net	46,879	20,575
Weighted Average Life	16 years
Trademarks [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, Cost	42,790	6,361
Intangible assets, Accumulated Amortization	(759)	0
Intangible assets, Net	42,031	6,361
Weighted Average Life	19 years
Customer relationships [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, Cost	75,249	75,249
Intangible assets, Accumulated Amortization	(17,374)	(12,176)
Intangible assets, Net	57,875	63,073
Weighted Average Life	14 years
Other [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, Cost	16,501	11,858
Intangible assets, Accumulated Amortization	(6,871)	(4,837)
Intangible assets, Net	9,630	$ 7,021
Weighted Average Life	7 years