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Subsequent Event (Details) (Metals USA, USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Feb. 28, 2013
Subsequent Events |  |
Price per share (in dollars per share) |  | $ 20.65
Enterprise value |  | $ 1,200.0
Go- shop period | 30 days |
Subsequent event | Forecast |  |
Subsequent Events |  |
Equity purchase price |  | 786
Value of debt assumed |  | $ 452.0

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