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Regulatory Matters (Narrative) (Details) | Dec. 31, 2024 | Dec. 31, 2023
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BCB Community Bank [Member] |  |
Regulatory Matters [Line Items] |  |
Capital Required to be Well Capitalized to Risk Weighted Assets | 0.0900 | 0.0900
Bancorp [Member] |  |
Regulatory Matters [Line Items] |  |
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets | 0.0600 | 0.0600
Capital Required to be Well Capitalized to Risk Weighted Assets | 0.1000 | 0.1000

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- Definition Ratio of minimum total risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 + Details
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