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v3.19.2

Benefit Plans and Stock-Based Compensation - Additional Information (Parenthetical) (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Mar. 30, 2019 USD ($) shares | Mar. 30, 2019 CAD ($) shares | Mar. 31, 2018 USD ($) shares | Mar. 31, 2018 CAD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Equity cash-out payment, option | (51,400) | (51,400) | (60,000) | (60,000)
Former Senior Executive [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Equity cash-out payment | $ 16,000 | $ 20,000 | $ 42,000 | $ 54,000
Omnibus LTIP [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Equity cash-out payment, option | 14,000 | 14,000 | 25,000 | 25,000
Long Term Incentive Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Equity cash-out payment, option | 35,000 | 35,000 | 35,000 | 35,000
Birks Stock Option Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Equity cash-out payment, option | 2,400 | 2,400 |  |

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