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Business Segment Information (Geographic Data) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) geographic_area | Dec. 31, 2014 USD ($) | Mar. 31, 2015 USD ($)
Geographic Data |  |  |  |  |
Number of geographic areas the Company operates in | geographic_area |  |  | 2 |  |
Operating revenues | $ 55,144 | $ 60,145 | $ 173,184 | $ 184,955 |
Assets | 423,529 |  | 423,529 |  | $ 466,025
United States of America |  |  |  |  |
Geographic Data |  |  |  |  |
Operating revenues | 53,876 | 57,698 | 168,780 | 176,715 |
Assets | 416,725 |  | 416,725 |  | 458,197
Europe |  |  |  |  |
Geographic Data |  |  |  |  |
Operating revenues | 1,268 | $ 2,447 | 4,404 | $ 8,240 |
Assets | $ 6,804 |  | $ 6,804 |  | $ 7,828

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