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Capital Stock (Details) (USD $)
1 Months Ended 12 Months Ended
Mar. 31, 2013
Jun. 30, 2013
Jul. 01, 2012
Jul. 03, 2011
Capital Stock        
Ratio for conversion into Class A common stock   100.00%    
Increase in authorized amount available to repurchase under stock repurchase plan $ 20,000,000      
Shares of common stock repurchased, value   9,599,000 3,277,000 454,000
Shares of common stock repurchased   2,490,065 1,133,913 168,207
Remaining authorized amount under stock repurchase plan   $ 18,900,000    
Class A common stock
       
Capital Stock        
Number of voting rights per common stock share   1    
Class B common stock
       
Capital Stock        
Number of voting rights per common stock share   10