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Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Sep. 25, 2015
Jun. 25, 2015
Jan. 30, 2015
Nov. 30, 2014
Aug. 31, 2013
Dec. 31, 2012
Nov. 21, 2012
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Equity (Textual)                    
Voting rights description               The holders of Class A common stock are entitled to three votes per share and the holders of Class B common stock are entitled to one-tenth of a vote per share.    
Dividends paid               $ 47,600 $ 13,600 $ 17,100
Cash paid to purchase ownership percentage in subsidiary         $ 1,100 $ 1,800   1,133 1,804
Ownership percentage increased in subsidiary         2.80% 4.50%        
Ownership percentage in subsidiary         88.40%          
Cash received on sale of Zedge stock to Shaman II L.P             $ 100      
Percentage of ownership after additional acquisition             11.17%      
Percentage of ownership before additional acquisition             11.10%      
Restricted Class B common stock purchased from employees               $ (2,777) (1,005) $ (301)
Straight Path [Member]                    
Equity (Textual)                    
Additional liability                 1,900  
Additional Paid-in Capital [Member]                    
Equity (Textual)                    
Additional liability                 $ 1,600  
Board of Directors [Member]                    
Equity (Textual)                    
Common stock aggregate cash dividends declared     $ 0.64 $ 0.68            
Chairman of the Board [Member]                    
Equity (Textual)                    
Purchase price per share   $ 18.52                
Stock repurchased in a fiscal year   404,967                
Aggregate purchase price of shares   $ 7,500                
Class A common stock [Member]                    
Equity (Textual)                    
Common stock aggregate cash dividends declared               $ 2.03 $ 0.59 $ 0.75
Class A common stock [Member] | Subsequent Event [Member]                    
Equity (Textual)                    
Common stock dividends declared $ 0.18                  
Paid date of declared dividend Oct. 15, 2015                  
Record date of declared dividend Oct. 07, 2015                  
Class B common stock [Member]                    
Equity (Textual)                    
Common stock aggregate cash dividends declared               $ 2.03 $ 0.59 $ 0.75
Stock repurchase program, shares authorized for repurchase               8,300,000    
Stock repurchased in a fiscal year               29,675   77,843
Aggregate purchase price of shares               $ 400   $ 800
Stock repurchase program, remaining number of shares authorized to be repurchased               5,000,000    
Class B common stock [Member] | Stock Repurchase Program [Member]                    
Equity (Textual)                    
Restricted Class B common stock purchased from employees               $ 2,800 $ 1,000 $ 300
Restricted Class B common stock purchased from employees, Shares               152,856 34,206 30,998
Class B common stock [Member] | Subsequent Event [Member]                    
Equity (Textual)                    
Common stock dividends declared $ 0.18                  
Paid date of declared dividend Oct. 15, 2015                  
Record date of declared dividend Oct. 07, 2015