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Shareholders' Equity - Additional Information (Details) - USD ($)
6 Months Ended 12 Months Ended 54 Months Ended
Oct. 31, 2018
Dec. 30, 2018
Jun. 24, 2018
Jun. 25, 2017
Oct. 31, 2018
Apr. 23, 2014
Equity Class Of Treasury Stock [Line Items]            
Payments of Dividends   $ 0 $ 0 $ 0    
2014 Stock Repurchase Program [Member]            
Equity Class Of Treasury Stock [Line Items]            
Stock Repurchase Program, Authorized Amount           $ 50,000,000
Stock repurchased during period, shares         806,000  
Stock repurchased, average price paid per share         $ 27.79  
Stock repurchased during period, value         $ 22,409,000  
Stock repurchase program termination date Oct. 31, 2018          
2014 Stock Repurchase Program [Member] | Common Stock [Member]            
Equity Class Of Treasury Stock [Line Items]            
Stock repurchased during period, shares   0        
2018 Stock Repurchase Program [Member]            
Equity Class Of Treasury Stock [Line Items]            
Stock Repurchase Program, Authorized Amount $ 50,000,000       $ 50,000,000  
Stock Repurchase Program, Remaining Authorized Repurchase Amount   $ 50,000,000