Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statement of Comprehensive Income (Parenthetical) (Unaudited)

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Condensed Consolidated Statement of Comprehensive Income (Parenthetical) (Unaudited) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Condensed Consolidated Statements of Comprehensive Income [Abstract]        
Defined benefit pension and other postretirement plans, tax $ 78 $ 35 $ 157 $ 70