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Derivative Instruments
12 Months Ended
Mar. 31, 2011
Notes to Financial Statements [Abstract]  
Derivative Instruments
21.
DERIVATIVE INSTRUMENTS
 
The Company has international operations and is thus subject to foreign currency rate fluctuations.  To help manage the risk of changes in foreign currency rates, the Company periodically enters into derivative contracts comprised of  foreign currency forward contracts to hedge its asset and liability foreign currency exposure and a portion of its foreign currency operating expenses.  Approximately 99% of the Company's sales are U.S. Dollar denominated.  To date, the exposure related to foreign exchange rate volatility has not been material to the Company's operating results.  As of March 31, 2011 and 2010, the Company had no foreign currency derivatives outstanding.  The Company recognized an immaterial amount of realized gains and losses on foreign currency derivatives in the years ended March 31, 2011, 2010 and 2009.