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Summary of Significant Accounting Policies (Details 3)	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012	Dec. 31, 2011
Segment Information
Number of reportable segments	1
Sales (as a percent)	100.00%	100.00%	100.00%
Carbon steel
Segment Information
Sales (as a percent)	53.00%	51.00%	53.00%
Aluminum
Segment Information
Sales (as a percent)	15.00%	15.00%	15.00%
Stainless steel
Segment Information
Sales (as a percent)	14.00%	15.00%	15.00%
Alloy steel
Segment Information
Sales (as a percent)	10.00%	12.00%	10.00%
Toll processing
Segment Information
Sales (as a percent)	2.00%	2.00%	2.00%
Other
Segment Information
Sales (as a percent)	6.00%	5.00%	5.00%

X

- Definition

Represents the percentage of revenue from sale of goods and services.

+ References

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+ Details

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X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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X

- Details

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