Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 5,599	$ 9,124	$ 12,622	$ 16,787
Other comprehensive income (loss):
Foreign currency translation adjustments	531	(1,892)	1,713	1,381
Comprehensive income	6,130	7,232	14,335	18,168
Comprehensive income attributable to noncontrolling interests	(582)	(433)	(1,548)	(1,482)
Comprehensive income attributable to IDT Corporation	$ 5,548	$ 6,799	$ 12,787	$ 16,686