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Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | ---
Segment Information Report of Balance Sheets |  |  |
Goodwill | $ 20,478 | $ 20,478 | $ 21,451
Total assets, Reportable Segments | 396,578 | 384,131 |
Assets | 422,422 | 413,373 |
Water Transmission [Member] |  |  |
Segment Information Report of Balance Sheets |  |  |
Goodwill |  |  |
Assets | 221,987 | 203,073 |
Tubular Products [Member] |  |  |
Segment Information Report of Balance Sheets |  |  |
Goodwill | 20,478 | 20,478 |
Assets | 174,591 | 181,058 |
Corporate [Member] |  |  |
Segment Information Report of Balance Sheets |  |  |
Assets | $ 25,844 | $ 29,242 |

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