Business Segment Information (Geographic Data) (Details) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2014
USD ($)
|
Sep. 30, 2015
USD ($)
geographic_area
|
Sep. 30, 2014
USD ($)
|
Mar. 31, 2015
USD ($)
|
|
| Geographic Data | |||||
| Number of geographic areas the Company operates in | geographic_area | 2 | ||||
| Operating revenues | $ 61,932 | $ 61,472 | $ 118,040 | $ 124,810 | |
| Assets | 440,108 | 440,108 | $ 466,025 | ||
| United States of America | |||||
| Geographic Data | |||||
| Operating revenues | 60,383 | 58,710 | 114,904 | 119,017 | |
| Assets | 432,843 | 432,843 | 458,197 | ||
| Europe | |||||
| Geographic Data | |||||
| Operating revenues | 1,549 | $ 2,762 | 3,136 | $ 5,793 | |
| Assets | $ 7,265 | $ 7,265 | $ 7,828 | ||