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Inventories And Warranties (Schedule Of Changes In Estimated Warranty Liability) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Inventories And Warranties [Abstract]    
Balance at beginning of period $ 694 $ 985
Accrual for warranties 151 332
Settlements made during the period (203) (301)
Balance at end of period $ 642 $ 1,016
Product warranties time frame, years 1 year