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Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jul. 31, 2015	Jul. 31, 2014
Property, Plant and Equipment [Abstract]
Equipment	$ 438,430	$ 438,899
Land and buildings	61,449	53,895
Computer software	130,340	116,775
Leasehold improvements	42,260	42,190
Furniture and fixtures	7,184	6,249
Property, plant and equipment, gross	679,663	658,008
Less accumulated depreciation and amortization	(588,347)	(576,248)
Property, plant and equipment, net	$ 91,316	$ 81,760

X

- Definition

Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

+ References

No definition available.

+ Details

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X

- Definition

Amount before accumulated depletion of building or real estate held for productive use, excluding land held for sale.

+ References

No definition available.

+ Details

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Namespace Prefix:	idt_
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X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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-Publisher FASB



-Name Accounting Standards Codification



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-SubTopic 10



-Section 50



-Paragraph 1



-Subparagraph (c)



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- Definition

Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

+ References

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 985



-SubTopic 20



-Section 50



-Paragraph 1



-Subparagraph (a)



-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

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X

- Definition

Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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X

- Definition

Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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X

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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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