Acquisitions (Narrative) (Details) (USD $)	2 Months Ended	12 Months Ended
	Dec. 31, 2012 item	Dec. 31, 2012 item	Dec. 31, 2011
Business Acquisition [Line Items]
Number of acquisitions	3	4
Aggregate purchase consideration for the acquisition	$ 43,117,000	$ 43,117,000
Excess consideration recorded as goodwill	15,011,000	15,011,000
Legal and consulting fees		456,000	986,000
Additional cost of sales		244,000	2,467,000
Award Metals facilities operated in U.S.		6
Award Metals [Member]
Business Acquisition [Line Items]
Aggregate purchase consideration for the acquisition			13,369,000
Payment for aggregate purchase consideration	1,954,000	1,954,000	1,826,000
Excess consideration recorded as goodwill			4,328,000
D.S. Brown [Member]
Business Acquisition [Line Items]
Aggregate purchase consideration for the acquisition	97,643,000	97,643,000	97,643,000
Excess consideration recorded as goodwill			46,198,000
Award Metals And DS Brown [Member]
Business Acquisition [Line Items]
Excess consideration recorded as goodwill	50,526,000	50,526,000
Goodwill deductible for tax purposes	$ 5,241,000	$ 5,241,000