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Derivative Instruments (Details)	6 Months Ended
	Jun. 30, 2014
Electricity [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Electricity
Settlement Dates	July 2014
Volume	17,600 MWh
Electricity 1 [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Electricity
Settlement Dates	August 2014
Volume	235,200 MWh
Electricity 2 [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Electricity
Settlement Dates	October 2014
Volume	36,800 MWh
Electricity 3 [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Electricity
Settlement Dates	November 2014
Volume	30,400 MWh
Electricity 4 [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Electricity
Settlement Dates	December 2014
Volume	35,200 MWh
Natural Gas [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Natural gas
Settlement Dates	August 2014
Volume	1,632,500 Dth
Natural Gas 1 [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Natural gas
Settlement Dates	September 2014
Volume	800,000 Dth
Natural Gas 2 [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Natural gas
Settlement Dates	January 2015
Volume	155,000 Dth
Natural Gas 3 [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Natural gas
Settlement Dates	July 2015
Volume	882,500 Dth
Natural Gas 4 [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Natural gas
Settlement Dates	January 2016
Volume	155,000 Dth
Natural Gas 5 [Member]
Summarized volume of IDT Energy's outstanding future contracts
Commodity	Natural gas
Settlement Dates	July 2016
Volume	155,000 Dth

X

- Definition

Description of derivative activity settlement date.

+ References

No definition available.

+ Details

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- Details

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X

- Definition

The underlying refers to the price on the security, commodity, index, or other variable specified by the contract.

+ References

No definition available.

+ Details

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X

- Definition

Information that would enable users to understand the volume of the entity's derivative activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959

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