Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012	Jan. 31, 2011
Revenues	$ 365,449	$ 340,867	$ 742,226	$ 650,634
Direct cost of revenues (exclusive of depreciation and amortization)	(306,365)	(282,746)	(625,717)	(535,138)
Gross profit	59,084	58,121	116,509	115,496
Operating expenses:
Selling, general and administrative (i)	51,552	50,339	103,335	99,490
Depreciation and amortization	4,231	5,504	8,673	11,183
Research and development	1,119	277	2,129	1,002
Severance and other charges	0	1,053	0	1,053
Total operating expenses	56,902	57,173	114,137	112,728
Other operating gains (loss), net	1,850	4,869	(9,402)	7,389
Income (loss) from operations	4,032	5,817	(7,030)	10,157
Interest expense, net	(1,350)	(978)	(1,828)	(2,219)
Other (expense) income, net	(429)	(1,108)	(240)	4,914
Income (loss) from continuing operations before income taxes	2,253	3,731	(9,098)	12,852
Benefit from income taxes	676	592	3,939	4,644
Income (loss) from continuing operations	2,929	4,323	(5,159)	17,496
Discontinued operations, net of tax:
(Loss) income from discontinued operations	0	(1,133)	1,015	1,533
Income on sale of discontinued operations	0	0	2,000	0
Total discontinued operations	0	(1,133)	3,015	1,533
Net income (loss)	2,929	3,190	(2,144)	19,029
Net loss (income) attributable to noncontrolling interests	(273)	746	474	555
Net income (loss) attributable to IDT Corporation	2,656	3,936	(1,670)	19,584
Amounts attributable to IDT Corporation common stockholders:
Income (loss) from continuing operations	2,656	4,030	(5,580)	16,988
(Loss) income from discontinued operations	0	(94)	3,910	2,596
Net income (loss)	2,656	3,936	(1,670)	19,584
Basic:
Income (loss) from continuing operations	$ 0.13	$ 0.19	$ (0.27)	$ 0.83
Income from discontinued operations	$ 0	$ 0	$ 0.19	$ 0.12
Net income (loss)	$ 0.13	$ 0.19	$ (0.08)	$ 0.95
Weighted-average number of shares used in calculation of basic earnings per share	20,492	20,565	20,429	20,554
Diluted:
Income (loss) from continuing operations	$ 0.12	$ 0.18	$ (0.27)	$ 0.76
Income from discontinued operations	$ 0	$ 0	$ 0.19	$ 0.11
Net income (loss)	$ 0.12	$ 0.18	$ (0.08)	$ 0.87
Weighted-average number of shares used in calculation of diluted earnings per share	21,811	22,460	20,429	22,419
Dividends declared per common share	$ 0.13	$ 0.44	$ 0.36	$ 0.44
(i) Stock-based compensation included in selling, general and administrative expenses	$ 932	$ 1,332	$ 1,616	$ 1,676