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Share Based Payment Arrangements - Additional Information (Detail)
9 Months Ended
May. 01, 2015
shares
Sep. 26, 2015
USD ($)
EquityPlan
shares
Sep. 27, 2014
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of employee equity incentive plans | EquityPlan   2  
Income tax benefit realized on disqualifying dispositions of stock acquired by exercise of incentive stock options | $   $ 348,000 $ 583,000
2013 Directors Stock Compensation Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock authorized for issuance   115,000  
Common stock reserved for issuance   94,334  
Other Stock Compensation Plans      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock reserved for issuance   5,512,527  
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Discount rate on stock awards   7.00% 7.00%
Stock awards granted   111,791  
Recognized share-based compensation expense | $   $ 3,446,000 $ 2,434,000
Unrecognized compensation cost expected to be recognized over period, years   3 years  
Restricted Stock Units (RSUs) | May 2015 Grant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards granted 20,000    
Restricted Stock Units (RSUs) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost, other than options | $   $ 24,849,000  
Restricted Stock Units (RSUs) | Maximum | January 2015 Grant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
RSU awards vesting period   5 years  
Maximum percentage of target available for common share issuance   200.00%  
Restricted Stock Units (RSUs) | Maximum | Prior to 2015 grant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
RSU awards vesting period   5 years  
Maximum percentage of target available for common share issuance   100.00%  
Restricted Stock Units (RSUs) | Maximum | May 2015 Grant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum percentage of target available for common share issuance 150.00%    
Restricted Stock Units (RSUs) | Minimum | Prior to 2015 grant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
RSU awards vesting period   3 years  
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost expected to be recognized over period, years   1 year 7 months 6 days  
Total intrinsic value of stock options exercised during periods | $   $ 2,542,000 $ 9,421,000
Unrecognized compensation cost | $   $ 1,773,000  
Non-vested Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards granted   1,197  
Unrecognized compensation cost, other than options | $   $ 526,000  
Unrecognized compensation cost expected to be recognized over period, years   1 year 2 months 12 days  
Terms of award   The Company's common stock on the date of grant and shares of non-vested restricted stock are generally subject to vesting in three equal annual installments or 100% on the fifth anniversary of the date of the grant.