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Short-Term And Long-Term Investments And Restricted Deposits (Narrative) (Details)
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Sep. 30, 2014
positions
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| Investments, Debt and Equity Securities [Abstract] | |
| Percentage of investments in securities recorded at fair value that carry a rating by Moody's or S&P of AAA/Aaa | 48.00% |
| Percentage of investments in securities recorded at fair value that carry a rating by Moody's or S&P of AA-/Aa3 or higher | 60.00% |
| Percentage of investments in securities recorded at fair value that carry a rating by Moody's or S&P of A-/A3 or higher | 90.00% |
| Positions from which gross unrealized losses were generated | 91 |
| TotalUnrealizedInvestmentPositions | 332 |