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Debt Agreement - Additional Information (Detail) - USD ($)
12 Months Ended
Feb. 25, 2017
Nov. 30, 2016
Nov. 30, 2012
Debt Instrument [Line Items]      
Revolving credit facility commitment fee description The Amended Credit Agreement pricing grid is adjusted quarterly and is based on the Company’s leverage ratio (as defined in the Amended Credit Agreement). The minimum pricing is LIBOR plus 0.90% or Base Rate (as defined in the Amended Credit Agreement) and the maximum pricing is LIBOR plus 1.75% or Base Rate (as defined in the Amended Credit Agreement) plus 0.75%. The Company is subject to an unused commitment fee based on the Company’s leverage ratio with minimum pricing of 0.10% and maximum pricing of 0.25%. In addition, the Company is subject to a letter of credit fee based on the Company’s leverage ratio with minimum pricing of 0.40% and maximum pricing of 1.25%.    
Minimum      
Debt Instrument [Line Items]      
Revolving credit facility, LIBOR rate 0.90%    
Revolving credit facility, commitment fee percentage 0.10%    
Letter of credit fee percentage 0.40%    
Maximum      
Debt Instrument [Line Items]      
Revolving credit facility, LIBOR rate 1.75%    
Revolving credit facility, commitment fee percentage 0.25%    
Letter of credit fee percentage 1.25%    
Base Rate | Maximum      
Debt Instrument [Line Items]      
Revolving credit facility, base rate 0.75%    
2017 Credit Agreement      
Debt Instrument [Line Items]      
Unsecured revolving credit facility, maximum borrowing capacity   $ 125,000,000  
Revolving credit facility agreement, expiration date Nov. 30, 2021    
Increase in credit facility maximum borrowing capacity   $ 200,000,000  
Stand-by letters of credit $ 1,500,000    
Revolving credit facility available for borrowing $ 123,500,000    
Amended Credit Agreement      
Debt Instrument [Line Items]      
Unsecured revolving credit facility, maximum borrowing capacity     $ 100,000,000