Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Details)

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Employee Benefit Plans (Details) (Pension plans, defined benefit [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Pension plans, defined benefit [Member]
     
Components of pension cost      
Service cost during the period $ 544 $ 459 $ 384
Interest cost on projected benefit obligation 1,427 1,421 1,340
Expected returns on assets (2,738) (2,713) (2,499)
Amortization of Unrecognized prior service cost 4 4 4
Amortization of Actuarial loss 1,011 517 421
Net pension cost (benefit) $ 248 $ (312) $ (350)