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Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Mar. 31, 2013
Equity [Abstract]  
Summary of Accumulated other comprehensive loss
Components of accumulated other comprehensive income (loss) on our balance sheet, net of tax, were as follows:
(In thousands)
 
2013
 
2012
Unrealized gain (loss) on:
 
 
 
 
Available-for-sale investments
 
$
11

 
$
(1
)
Post-retirement plan liability adjustments
 
(117
)
 
(122
)
Accumulated other comprehensive loss
 
$
(106
)
 
$
(123
)