Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,050	$ 4,168
Other comprehensive income:
Foreign currency translation adjustments	664	1,628
Comprehensive income	4,714	5,796
Comprehensive income attributable to noncontrolling interests	(527)	(546)
Comprehensive income attributable to IDT Corporation	$ 4,187	$ 5,250