Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents And Investments (Narrative) (Details)

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Cash, Cash Equivalents And Investments (Narrative) (Details) (USD $)
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Cash Equivalents And Investments [Abstract]    
Gross realized gains (losses) $ 0 $ 0