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Selected Statements Of Operations Data (Schedule Of Net Earnings Per Share) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Selected Statements Of Operations Data [Abstract]      
Numerator for basic and diluted net earnings per share - income (loss) available to shareholders of Ordinary shares $ (23,391) $ (53,654) $ 14,062
Denominator for basic net earnings per share - weighted average number of shares 36,457,989 35,975,434 34,854,657
Employee stock options and RSU     1,710,173
Denominator for diluted net earnings per share - adjusted weighted average number of shares 36,457,989 35,975,434 36,564,830