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Current Vulnerability Due to Certain Concentrations (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Concentration Risks [Abstract] |  |
Duration of business operations in Israel (in years) | 42 |
Peoples Republic Of China [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 7.80% |
Credit Concentration Risk [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Bank Hapoalim |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 12.60% |
Credit Concentration Risk [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Bank Leumi [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 13.30% |
Credit Concentration Risk [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | Unicredit [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 20.80% |
Credit Concentration Risk [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | KBC [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 12.60% |
Credit Concentration Risk [Member] | Cash and Cash Equivalents and Short-term Investments [Member] | HSBC [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 15.90% |
Geographic Concentration [Member] | United States [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 1.80% |
Geographic Concentration [Member] | Germany [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 37.90% |
Geographic Concentration [Member] | Other Europe [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 7.10% |
Geographic Concentration [Member] | Israel [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 26.00% |
Geographic Concentration [Member] | Other Asia [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 9.30% |
Geographic Concentration [Member] | Other Geographic Area [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 0.60% |
Geographic Concentration [Member] | Singapore [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 9.50% |
Geographic Concentration [Member] | Outside Of United States [Member] |  |
Concentration Risks [Abstract] |  |
Cash and cash equivalents and short-term investments | 974,323 |
Geographic Concentration [Member] | Revenue [Member] | Outside Of United States [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 74.00% |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |
Concentration Risks [Abstract] |  |
Concentration risk percentage (in hundredths) | 14.70% | 10.90%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 + Details
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- Definition The number of years that the business operation in Israel has existed. + References No definition available. + Details
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