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Employee Benefit Plans (Weighted Average Discount Rate) (Details)
12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Officer Medical Plan
     
Defined Benefit Plan Disclosure [Line Items]      
Weighted-average discount rate for benefit obligation 4.75% 4.75% 5.00%
Retired Officers' Bonus Plan
     
Defined Benefit Plan Disclosure [Line Items]      
Weighted-average discount rate for benefit obligation 4.75% 4.75% 5.00%