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Summary of Significant Accounting Policies - Goodwill and Indefinite Lived Intangible Assets (Details)
$ in Thousands
12 Months Ended
Mar. 28, 2020
USD ($)
store
segment
Mar. 30, 2019
USD ($)
store
Mar. 31, 2018
USD ($)
store
Goodwill and Indefinite-Lived Intangible Assets      
Number of reporting units | segment 2    
Goodwill impairment $ 0 $ 0 $ 0
Impairment of indefinite-lived intangible assets, excluding goodwill 0 0 0
Long-Lived Assets      
Impairments of long lived assets $ 191 $ 455 $ 83
Number of stores with asset impairment | store 1 3 2
Customer lists      
Definite-Lived Intangible Assets      
Useful life 5 years    
Trademarks      
Definite-Lived Intangible Assets      
Useful life 3 years