XML 62 R47.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Summary of Significant Accounting Policies (Summary of Useful Lives of Property, Plant and Equipment) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2024
Buildings [Member] |
Property, Plant and Equipment [Line Items] |
Premises and equipment, useful life | 40 years
Leasehold improvements [Member] |
Property, Plant and Equipment [Line Items] |
Premises and equipment, useful life description | Shorter of useful life or term of lease
Minimum [Member] | Building improvements [Member] |
Property, Plant and Equipment [Line Items] |
Premises and equipment, useful life | 7 years
Minimum [Member] | Furniture, fixtures and equipment [Member] |
Property, Plant and Equipment [Line Items] |
Premises and equipment, useful life | 5 years
Maximum [Member] | Building improvements [Member] |
Property, Plant and Equipment [Line Items] |
Premises and equipment, useful life | 40 years
Maximum [Member] | Furniture, fixtures and equipment [Member] |
Property, Plant and Equipment [Line Items] |
Premises and equipment, useful life | 7 years

X
- Definition Premises And Equipment Useful Life Description + References No definition available. + Details
Name: | bcbp_PremisesAndEquipmentUsefulLifeDescription
Namespace Prefix: | bcbp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A + Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdsAndLeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |