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Segment Reporting Segment Reporting - Segment Information for Total Assets (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
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Dec. 31, 2014
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|---|---|---|---|---|---|---|
| Segment Reporting Information [Line Items] | ||||||
| Assets | $ 592,276 | $ 587,976 | ||||
| Metals segment | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Assets | 491,447 | 489,563 | ||||
| Plastics segment | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Assets | 62,826 | 60,970 | ||||
| Other | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Assets | $ 38,003 | [1] | $ 37,443 | [1] | ||
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