Goodwill and Intangible Assets Goodwill (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014
Changes in carrying amounts of goodwill
Beginning Goodwill Gross			$ 129,506
Accumulated impairment losses			(60,217)			(116,377)
Goodwill Net Beginning Balance			69,289
Goodwill, Impairment Loss	(56,160)	0	(56,160)	0	0
Currency valuation			(156)
Ending Goodwill Gross	129,350		129,350		129,506
Goodwill Net Ending Balance	12,973		12,973		69,289
Fair value inputs, discount rate risk premium			1.00%
Fair Value Inputs, Discount Rate			13.00%
Metals Segment [Member]
Changes in carrying amounts of goodwill
Beginning Goodwill Gross			116,533
Accumulated impairment losses			(60,217)			(116,377)
Goodwill Net Beginning Balance			56,316
Goodwill, Impairment Loss			(56,160)
Currency valuation			(156)
Ending Goodwill Gross	116,377		116,377
Goodwill Net Ending Balance	0		0
Deductible goodwill impairment loss	26,300
Plastics Segment
Changes in carrying amounts of goodwill
Beginning Goodwill Gross			12,973
Accumulated impairment losses			0			0
Goodwill Net Beginning Balance			12,973
Goodwill, Impairment Loss			0
Currency valuation			0
Ending Goodwill Gross	12,973		12,973
Goodwill Net Ending Balance	$ 12,973		$ 12,973