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Regulatory Matters (Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations) (Details) $ in Thousands | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
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BCB Community Bank [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total capital (to risk-weighted assets): Actual - Amount | $ 363,697 | $ 350,749
Total capital (to risk-weighted assets): Actual - Ratio | 0.1003 | 0.0909
Total capital (to risk-weighted assets): For Capital Adequacy Purposes - Amount | $ 290,087 | $ 308,608
Total capital (to risk-weighted assets): For Capital Adequacy Purposes - Ratio | 0.0800 | 0.0800
Total capital (to risk-weighted assets): To be Well Capitalized under Prompt Corrective Action Provisions - Amount | $ 326,348 | $ 347,184
Total capital (to risk-weighted assets): To be Well Capitalized under Prompt Corrective Action Provisions - Ratio | 0.0900 | 0.0900
Bancorp [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total capital (to risk-weighted assets): Actual - Amount | $ 400,591 | $ 379,562
Total capital (to risk-weighted assets): Actual - Ratio | 0.1289 | 0.1114
Total capital (to risk-weighted assets): For Capital Adequacy Purposes - Amount | $ 248,621 | $ 272,564
Total capital (to risk-weighted assets): For Capital Adequacy Purposes - Ratio | 0.0800 | 0.0800
Total capital (to risk-weighted assets): To be Well Capitalized under Prompt Corrective Action Provisions - Amount | $ 310,777 | $ 340,705
Total capital (to risk-weighted assets): To be Well Capitalized under Prompt Corrective Action Provisions - Ratio | 0.1000 | 0.1000
Tier 1 capital (to risk-weighted assets): Actual - Amount | $ 326,965 | $ 319,154
Tier 1 capital (to risk-weighted assets): Actual - Ratio | 0.1052 | 0.0937
Tier 1 capital (to risk-weighted assets): For Capital Adequacy Purposes - Amount | $ 186,482 | $ 204,422
Tier 1 capital (to risk-weighted assets): For Capital Adequacy Purposes - Ratio | 0.0600 | 0.0600
Tier 1 capital (to risk-weighted assets): To be Well Capitalized under Prompt Corrective Action Provisions - Amount | $ 186,482 | $ 204,422
Tier 1 capital (to risk-weighted assets): To be Well Capitalized under Prompt Corrective Action Provisions - Ratio | 0.0600 | 0.0600
Common Equity Tier 1 (to risk-weighted assets): Actual - Amount | $ 298,118 | $ 289,987
Common Equity Tier 1 (to risk-weighted assets): Actual - Ratio | 0.0959 | 0.0851
Common Equity Tier 1 (to risk-weighted assets): For Capital Adequacy Purposes - Amount | $ 139,889 | $ 153,317
Common Equity Tier 1 (to risk-weighted assets): For Capital Adequacy Purposes - Ratio | 0.0450 | 0.0450
Tier 1 capital (to average assets): Actual - Amount | $ 326,965 | $ 319,154
Tier 1 capital (to average assets): Actual - Ratio | 0.0902 | 0.0827
Tier 1 capital (to average assets): For Capital Adequacy Purposes - Amount | $ 144,996 | $ 154,315
Tier 1 capital (to average assets): For Capital Adequacy Purposes - Ratio | 0.0400 | 0.0400

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- Definition Amount of total capital as defined by regulatory framework. + 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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