Equity (Tables)

9 Months Ended

Apr. 30, 2015

Equity [Abstract]

Summary of Changes in the Components of Equity

	Nine Months Ended  April 30, 2015
	Attributable to IDT Corporation			Noncontrolling Interests			Total
	(in thousands)
Balance, July 31, 2014	$	100,239		$	925		$	101,164
Dividends declared ($1.85 per share)		(43,171	)		—			(43,171	)
Restricted Class B common stock purchased from employees		(279	)		—			(279	)
Repurchases of Class B common stock through repurchase program		(424	)		—			(424	)
Exercise of stock options.		3,317			—			3,317
Stock issued for matching contributions to the 401(k) Plan		1,266			—			1,266
Other		—			9			9
Sale of interest in Fabrix Systems Ltd.		102			538			640
Distributions to noncontrolling interests		—			(1,450	)		(1,450	)
Stock-based compensation		4,430			62			4,492
Comprehensive income:
Net income		83,231			1,003			84,234
Other comprehensive loss		(2,900	)		—			(2,900	)
Comprehensive income		80,331			1,003			81,334
Balance, April 30, 2015	$	145,811		$	1,087		$	146,898