Annual report pursuant to Section 13 and 15(d)

SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details)

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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) (Allowance for Doubtful Accounts, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Allowance for Doubtful Accounts
     
VALUATION AND QUALIFYING ACCOUNTS      
Balance at the beginning of the period $ 2,228 $ 212 $ 121
Additions charged to costs and expenses 276 2,256 359
Deductions (362) (240) (268)
Balance at the end of the period $ 2,142 $ 2,228 $ 212