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Employee Benefit and Stock Compensation Plans Benefits (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation $ 0 $ 2,426 $ 2,614
Defined Benefit Plan, Interest Cost 61 106 122
Defined Benefit Plan, Actuarial Gain (Loss) (165) 53  
Defined Benefit Plan, Benefits Paid (2,497) (390)  
Defined Benefit Plan, Settlements, Benefit Obligation 175 43  
Defined Benefit Plan, Fair Value of Plan Assets 0 2,023 2,251
Defined Benefit Plan, Actual Return on Plan Assets Still Held 120 160  
Defined Benefit Plan, Contributions by Employer 354 0  
Fair Value plan assets benefits paid (97) (190)  
Defined Benefit Plan, Settlements, Plan Assets (2,400) (198)  
Defined Benefit Plan, Funded Status of Plan 0 (403)  
Pension and Other Postretirement Defined Benefit Plans, Liabilities $ 0 $ (403)