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Contingencies and Litigation (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended |
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Mar. 31, 2012
Contingencies and Litigation [Abstract] |  |  |
Value added tax payable | $ 10,683 |  | $ 10,683
Environmental Matters [Abstract] |  |  |
Reserves for these environmental matters | 5,887 |  | 6,946
Additional reserve, continuing operations | $ 110 | $ 934 |

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