XML 27 R47.htm IDEA: XBRL DOCUMENT v2.4.0.6
Accounts Payable And Accrued Expenses (Schedule Of Product Warranty Activity) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Balance at beginning of period $ 4,792 $ 7,055 $ 5,896 $ 7,907
Change in accruals for warranties during the period (627) (300) (1,178) (774)
Settlements during the period (147) (482) (700) (860)
Balance at end of period $ 4,018 $ 6,273 $ 4,018 $ 6,273
Minimum [Member]
        
Warranty period     1 year  
Maximum [Member]
        
Warranty period     3 years