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Goodwill and Other Intangible Assets - Goodwill (Details)
$ in Thousands
12 Months Ended
Apr. 28, 2018
USD ($)
item
Apr. 29, 2017
USD ($)
Apr. 30, 2016
USD ($)
Key assumptions used in assessment of goodwill      
Goodwill impairment $ 0 $ 0 $ 0
Roll-forward of goodwill      
Balance at beginning of period 74,245 37,193  
Acquisitions   36,584  
Translation adjustment 1,009 468  
Balance at end of period $ 75,254 $ 74,245 $ 37,193
Goodwill      
Key assumptions used in assessment of goodwill      
Discount rate (as a percent) 8.90%    
Tax rate (as a percent) 24.50%    
Terminal growth rate (as a percent) 2.00%    
Casegoods Segment      
Goodwill      
Number of reporting units for goodwill | item 1    
Retail Segment      
Goodwill      
Number of reporting units for goodwill | item 1    
Roll-forward of goodwill      
Balance at end of period $ 62,300