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Business Segment Information (Details Textual) | 6 Months Ended
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Jun. 30, 2014 Segment
Business Segment Information (Textual) |
Number of Reportable Segments | 2
GEIC [Member] |
Business Segment Information (Textual) |
Company's investment, ownership percentage in subsidiary | 99.30%
IDT Energy [Member] |
Business Segment Information (Textual) |
Company's investment, ownership percentage in subsidiary | 100.00%
Deferred stock units, stock obligation to related parties | 1.40%
GOGAS [Member] |
Business Segment Information (Textual) |
Company's investment, ownership percentage in subsidiary | 92.00%
AMSO, LLC [Member] |
Business Segment Information (Textual) |
Company's investment, ownership percentage in subsidiary | 44.90%
IEI [Member] |
Business Segment Information (Textual) |
Company's investment, ownership percentage in subsidiary | 87.90%
Afek [Member] |
Business Segment Information (Textual) |
Company's investment, ownership percentage in subsidiary | 88.50%
Genie Mangolia [Member] |
Business Segment Information (Textual) |
Company's investment, ownership percentage in subsidiary | 89.90%

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- Details
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- Definition Deferred stock units granted represent Obligation percentage of equity. + References No definition available. + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Definition Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions. + References No definition available. + Details
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