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Inventories - Continuity of Obsolescence Reserve for Inventory (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 28, 2015 | Mar. 29, 2014 | Mar. 30, 2013
Inventory Disclosure [Abstract] |  |  |
Beginning balance | $ 2,514 | $ 3,557 | $ 4,680
Additional charges | 1,545 | 1,214 | 1,304
Deductions | (1,313) | (2,257) | (2,427)
Ending balance | $ 2,746 | $ 2,514 | $ 3,557

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

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- Definition Deductions Of Obsolescence Reserve For Inventory + References No definition available. + Details
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Namespace Prefix: | bgi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Inventory Obsolescence + References No definition available. + Details
Name: | bgi_InventoryObsolescence
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_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration