Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Oct. 31, 2013		Oct. 31, 2012
Income Statement [Abstract]
Revenues	$ 420,670		$ 400,117
Costs and expenses:
Direct cost of revenues (exclusive of depreciation and amortization)	350,319		335,251
Selling, general and administrative (i)	57,755		53,315
Depreciation and amortization	3,896		3,135
Research and development	2,276		1,382
Total costs and expenses	414,246		393,083
Other operating gains (loss), net	571	[1]
Income from operations	7,283		6,684
Interest (expense) income, net	(25)		105
Other (expense) income, net	(549)		885
Income from continuing operations before income taxes	6,709		7,674
Provision for income taxes	(2,659)		(2,054)
Income from continuing operations	4,050		5,620
Loss from discontinued operations, net of tax			(1,452)
Net income	4,050		4,168
Net income attributable to noncontrolling interests	(527)		(554)
Net income attributable to IDT Corporation	3,523		3,614
Amounts attributable to IDT Corporation common stockholders:
Income from continuing operations	3,523		5,066
Loss from discontinued operations			(1,452)
Net income	3,523		3,614
Basic:
Income from continuing operations	$ 0.17		$ 0.24
Loss from discontinued operations			$ (0.07)
Net income	$ 0.17		$ 0.17
Weighted-average number of shares used in calculation of basic earnings per share	21,038		20,807
Diluted:
Income from continuing operations	$ 0.15		$ 0.23
Loss from discontinued operations			$ (0.07)
Net income	$ 0.15		$ 0.16
Weighted-average number of shares used in calculation of diluted earnings per share	22,912		22,084
Dividends declared per common share			$ 0.75
(i) Stock-based compensation included in selling, general and administrative expenses	$ 2,495		$ 1,012

[1] In the three months ended October 31, 2013, the Company received proceeds from insurance of $0.6 million related to water damage to portions of the Company's building and improvements at 520 Broad Street, Newark, New Jersey. The damage occurred in a prior period. The Company recorded a gain of $0.6 million from this insurance claim.