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Accounts Payable And Accrued Expenses (Schedule Of Product Warranty Activity) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Balance at beginning of period	$ 5,896	$ 7,907
Change in accruals for warranties during the period	1,371	1,648
Settlements during the period	(4,558)	(3,659)
Balance at end of period	$ 2,709	$ 5,896
Minimum [Member]
Warranty period	1 year
Maximum [Member]
Warranty period	3 years

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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