Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 153,823	$ 151,600
Restricted cash and cash equivalents-short-term	65,706	34,988
Marketable securities	12,873	9,684
Trade accounts receivable, net of allowance for doubtful accounts of $11,507 and $13,079 at July 31, 2014 and 2013, respectively	69,330	65,078
Prepaid expenses	21,799	19,175
Deferred income tax assets, net-current portion	2,953	1,689
Other current assets	12,381	12,730
TOTAL CURRENT ASSETS	338,865	294,944
Property, plant and equipment, net	81,760	80,742
Goodwill	14,830	14,807
Other intangibles, net	1,742	1,390
Investments	10,008	9,605
Restricted cash and cash equivalents-long-term	2,763	2,767
Deferred income tax assets, net-long-term portion	16,248	20,000
Other assets	14,715	11,152
TOTAL ASSETS	480,931	435,407
CURRENT LIABILITIES:
Revolving credit loan payable	13,000	21,062
Trade accounts payable	42,135	39,323
Accrued expenses	142,528	145,432
Deferred revenue	101,165	91,227
Customer deposits	62,685	28,663
Income taxes payable	732	761
Dividends payable		1,837
Notes payable-current portion	271	535
Other current liabilities	5,468	4,829
TOTAL CURRENT LIABILITIES	367,984	333,669
Notes payable-long-term portion	6,353	6,624
Other liabilities	5,430	5,978
TOTAL LIABILITIES	379,767	346,271
Commitments and contingencies
IDT Corporation stockholders' equity:
Preferred stock, $.01 par value; authorized shares-10,000; no shares issued
Additional paid-in capital	392,858	388,533
Treasury stock, at cost, consisting of 1,698 and 1,698 shares of Class A common stock and 2,934 and 2,878 shares of Class B common stock at July 31, 2014 and 2013, respectively	(99,841)	(98,836)
Accumulated other comprehensive income	3,668	2,341
Accumulated deficit	(196,725)	(203,711)
Total IDT Corporation stockholders' equity	100,239	88,603
Noncontrolling interests	925	533
TOTAL EQUITY	101,164	89,136
TOTAL LIABILITIES AND EQUITY	480,931	435,407
Class A Common Stock [Member]
IDT Corporation stockholders' equity:
Common stock, value	33	33
Class B Common Stock [Member]
IDT Corporation stockholders' equity:
Common stock, value	$ 246	$ 243