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Summary of Significant Accounting Policies - Hurricane-related Insurance Claims (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 30, 2019 | Mar. 31, 2018
Hurricane-Related Insurance Claims |  |
Damaged asset write-off | $ 312 | $ 2,357
Hurricane Harvey |  |
Hurricane-Related Insurance Claims |  |
Damaged asset write-off |  | 3,200
Repairs and maintenance expense |  | 300
Insurance proceeds | 5,100 |
Business interruption insurance proceeds | $ 100 |
Net gain on insurance recovery |  | $ 1,600

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