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Goodwill and Other Intangible Assets - Intangible Assets (Details)
$ in Thousands
 6 Months Ended
Oct. 28, 2017
USD ($)
Roll-forward of other intangible assets  
Balance at beginning of period $ 18,489
Amortization (730)
Translation adjustment 225
Balance at end of period 17,984
Trade Names  
Roll-forward of other intangible assets  
Balance at beginning of period 1,155
Balance at end of period 1,155
Reacquired Rights  
Roll-forward of other intangible assets  
Balance at beginning of period 13,747
Amortization (528)
Translation adjustment 176
Balance at end of period 13,395
Other Intangible Assets  
Roll-forward of other intangible assets  
Balance at beginning of period 3,587
Amortization (202)
Translation adjustment 49
Balance at end of period $ 3,434