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v2.4.1.9

Equity (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2015 | Apr. 30, 2014 | Apr. 30, 2015 | Apr. 30, 2014
Changes in the components of equity |  |  |  |
Beginning Balance |  |  | $ 101,164 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |
Dividends declared ($1.85 per share) |  |  | (43,171)us-gaap_DividendsCash |
Restricted Class B common stock purchased from employees |  |  | (279)idt_RepurchaseOfRestrictedStock |
Repurchases of Class B common stock through repurchase program |  |  | (424)idt_RepurchaseOfCommonStockUnderStockRepurchaseProgram |
Exercise of stock options |  |  | 3,317 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |
Stock issued for matching contributions to the 401(k) Plan |  |  | 1,266 idt_DefinedContributionPlanEmployerMatchingContributionInEmployerSharesValueOfShares |
Other |  |  | 9 idt_ChangesInOtherNoncontrollingInterest |
Sale of interest in Fabrix Systems Ltd. |  |  | 640 idt_StockholdersEquityDecreaseFromDeconsolidationDueToSubsidiarySale |
Distributions to noncontrolling interests |  |  | (1,450)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders |
Stock-based compensation |  |  | 4,492 idt_StockBasedCompensation |
Comprehensive income: |  |  |  |
Net income | 1,123 us-gaap_ProfitLoss | 5,599 us-gaap_ProfitLoss | 84,234 us-gaap_ProfitLoss | 12,622 us-gaap_ProfitLoss
Other comprehensive loss | 1,062 us-gaap_OtherComprehensiveIncomeLossNetOfTax | 531 us-gaap_OtherComprehensiveIncomeLossNetOfTax | (2,900)us-gaap_OtherComprehensiveIncomeLossNetOfTax | 1,713 us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive income | 2,185 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 6,130 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 81,334 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 14,335 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Ending Balance | 146,898 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |  | 146,898 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |
Attributable to IDT Corporation [Member] |  |  |  |
Changes in the components of equity |  |  |  |
Beginning Balance |  |  | 100,239 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Dividends declared ($1.85 per share) |  |  | (43,171)us-gaap_DividendsCash / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Restricted Class B common stock purchased from employees |  |  | (279)idt_RepurchaseOfRestrictedStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Repurchases of Class B common stock through repurchase program |  |  | (424)idt_RepurchaseOfCommonStockUnderStockRepurchaseProgram / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Exercise of stock options |  |  | 3,317 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Stock issued for matching contributions to the 401(k) Plan |  |  | 1,266 idt_DefinedContributionPlanEmployerMatchingContributionInEmployerSharesValueOfShares / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Other |  |  |  |
Sale of interest in Fabrix Systems Ltd. |  |  | 102 idt_StockholdersEquityDecreaseFromDeconsolidationDueToSubsidiarySale / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Distributions to noncontrolling interests |  |  |  |
Stock-based compensation |  |  | 4,430 idt_StockBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Comprehensive income: |  |  |  |
Net income |  |  | 83,231 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Other comprehensive loss |  |  | (2,900)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Comprehensive income |  |  | 80,331 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Ending Balance | 145,811 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  | 145,811 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Noncontrolling Interests [Member] |  |  |  |
Changes in the components of equity |  |  |  |
Beginning Balance |  |  | 925 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Dividends declared ($1.85 per share) |  |  |  |
Restricted Class B common stock purchased from employees |  |  |  |
Repurchases of Class B common stock through repurchase program |  |  |  |
Exercise of stock options |  |  |  |
Stock issued for matching contributions to the 401(k) Plan |  |  |  |
Other |  |  | 9 idt_ChangesInOtherNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Sale of interest in Fabrix Systems Ltd. |  |  | 538 idt_StockholdersEquityDecreaseFromDeconsolidationDueToSubsidiarySale / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Distributions to noncontrolling interests |  |  | (1,450)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Stock-based compensation |  |  | 62 idt_StockBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Comprehensive income: |  |  |  |
Net income |  |  | 1,003 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Other comprehensive loss |  |  |  |
Comprehensive income |  |  | 1,003 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Ending Balance | $ 1,087 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  | $ 1,087 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |

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