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Business Combination, Goodwill and Other Intangible Assets - ProForma Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 21 Months Ended
Feb. 24, 2018
Feb. 25, 2017
Nov. 26, 2016
Feb. 24, 2018
Feb. 25, 2017
Feb. 24, 2018
Business Acquisition [Line Items]            
Postretirement health care benefit income, net of tax         $ 16,300  
Acquisition related costs $ 0 $ 463   $ 50 5,925  
Grand Design [Member]            
Business Acquisition [Line Items]            
Revenue since acquisition       450,708 169,421  
Operating income since acquisition       55,254 6,759  
Pro forma net revenues       918,380 711,485  
Pro forma net income       $ 40,155 $ 41,153  
Pro forma income per share - basic (in dollars per share)       $ 1.27 $ 1.30  
Pro forma income per share - diluted (in dollars per share)       $ 1.26 $ 1.30  
Acquisition related costs           $ 6,900
Amortization of intangibles (1 year or less useful life) [Member]            
Business Acquisition [Line Items]            
Nonrecurring adjustments       $ (122) $ (10,376)  
Increase in amortization of intangibles [Member]            
Business Acquisition [Line Items]            
Nonrecurring adjustments       0 1,551  
Expenses Related to Business Combination [Member]            
Business Acquisition [Line Items]            
Nonrecurring adjustments       (50) (5,982)  
Grand Design Expenses Related to Business Combination [Member]            
Business Acquisition [Line Items]            
Nonrecurring adjustments     $ (100)      
Interest to reflect new debt structure [Member]            
Business Acquisition [Line Items]            
Nonrecurring adjustments       0 3,672  
Taxes related to the adjustments to the pro forma [Member]            
Business Acquisition [Line Items]            
Nonrecurring adjustments       $ 64 $ 8,303