v3.3.0.814
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