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Inventories - Continuity of Obsolescence Reserve for Inventory (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 25, 2017 | Mar. 26, 2016 | Mar. 28, 2015
Inventory Disclosure [Abstract] |  |  |
Beginning balance | $ 2,144 | $ 2,746 | $ 2,514
Additional charges | 496 | 626 | 1,545
Deductions | (954) | (1,228) | (1,313)
Ending balance | $ 1,686 | $ 2,144 | $ 2,746

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- Definition Additional Charges Of Obsolescence Reserve For Inventory + References No definition available. + Details
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- Definition Deductions Of Obsolescence Reserve For Inventory + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Inventory Obsolescence + References No definition available. + Details
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Namespace Prefix: | bgi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration