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Revenue Recognized on Consolidated Statements of Operations for Redemption of Gift Cards and Loyalty Rewards Deferred (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Abstract] |  |  |
Revenue recognized from gift card liability | $ 10,629 | $ 11,261 | $ 14,978
Revenue recognized from guest loyalty program | $ 7,031 | $ 7,166 | $ 7,510

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- Definition Contract with customer liability, revenue recognized from customer loyalty program. + References No definition available. + Details
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Namespace Prefix: | bjri_
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Balance Type: | credit
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
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Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
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