Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical)

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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Defined Benefit Plan Disclosure [Line Items]      
Accumulated foreign currency translation adjustments $ 410 $ 375 $ 300
Pension plans, defined benefit
     
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit adjustments/Accumulated other postretirement benefit adjustments (8,283) (8,515) (5,418)
Other postretirement benefit plans
     
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit adjustments/Accumulated other postretirement benefit adjustments $ (160) $ (20) $ 106