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Allocation of Purchase Price (Detail) - USD ($)
$ in Thousands
Feb. 25, 2017
Feb. 27, 2016
Feb. 28, 2015
Business Acquisition [Line Items]      
Goodwill $ 0 $ 44,029 $ 34,719
Series of Individually Immaterial Business Acquisitions      
Business Acquisition [Line Items]      
Goodwill   9,147  
Tangible assets, net of liabilities   (216)  
Total purchase price   $ 8,931