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Incentive and Stock-Based Compensation (Tables)
6 Months Ended
Sep. 30, 2011
Incentive And Stock-based Compensation [Abstract] 
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
  Performance-Based Awards Time-Based Awards Stock Options
  Performance          
  Shares PARS      
          Deferred   
(in thousands)Units Units Shares Shares Units Shares
Balance, April 1, 2011 479  191  532  298  15  220
Granted 88  88  38  72  -  -
Reduction from change in estimate (40)  -  -  -  -  -
Vested / Exercised (162)  -  (81)  (43)  -  (45)
Forfeited -  -  (8)  (3)  -  -
Balance, September 30, 2011 365  279  481  324  15  175