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Pension And Employee Benefit Plans (Components Of Net Periodic Cost) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Pension And Employee Benefit Plans [Abstract]        
Service Cost - Benefits Earned during the Period $ 139 $ 148 $ 417 $ 418
Interest Cost of Benefit Obligations 265 283 795 795
Expected Return on Plan Assets (291) (461) (873) (873)
Recognized Net Actuarial Loss 86 122 258 266
Amortization of Prior-Service Cost 20 4 60 60
Net Periodic Pension Cost $ 219 $ 96 $ 657 $ 666