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Consolidated Statement of Changes in Shareholders' Equity (Parenthetical) | 9 Months Ended
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Sep. 30, 2024 shares
Consolidated Statement of Changes in Shareholders' Equity |
ESOP shares committed to be released | 127,766
Common shares ESOP | 2,416,458

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- Definition Number of shares purchased by the Employee Stock Ownership Plan. + References No definition available. + Details
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Namespace Prefix: | nbbk_
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Balance Type: | na
Period Type: | duration

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- Definition This item represents the number of shares provided to the Employee Stock Ownership Plan (ESOP) during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480489/718-40-50-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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