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Financial Instruments and Risk Management (Details Textual) (USD $)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Foreign Currency Transaction Gain, before Tax | $ 380,000 | $ 70,000 | $ 340,000 |
| Description of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Activities | Foreign exchange forward contracts in effect as of December 31, 2012 were for the conversion of 20.9 million Euros into 26.8 million U.S. dollars and 37.0 million U.S. dollars into 145.6 million NIS. | ||
| Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value | 1,800,000 | ||
| Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value | 800,000 | ||
| Long-term Investments | $ 1,600,000 | ||
| X | ||||||||||
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- Definition
General discussion of the entity's activities involving foreign currency derivatives not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate realized and unrealized gain on foreign currency transactions included in net income. Includes gain on a foreign currency forward exchange contract. Does not include foreign currency transactions designated as hedges of net investment in a foreign entity or intercompany foreign currency transactions that are of a long-term nature. Gross of tax effect. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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