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Benefits Plans (Schedule of Fair Value of Plan Assets) (Details) - Pension Plan [Member] - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | $ 6,012 | $ 5,965 | $ 7,144 | $ 7,112
(Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 6,012 | 5,965 |  |
Mutual funds-Equity: Large-Cap Value [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 1,120 | 1,052 |  |
Mutual funds-Equity: Large-Cap Value [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 1,120 | 1,052 |  |
Mutual-funds-Equity: Large-Cap Growth [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 261 | 170 |  |
Mutual-funds-Equity: Large-Cap Growth [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 261 | 170 |  |
Mutual-funds-Equity: Diversified Emerging Markets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 95 | 96 |  |
Mutual-funds-Equity: Diversified Emerging Markets [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 95 | 96 |  |
Mutual funds-Equity: Large Blend [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 1,025 | 957 |  |
Mutual funds-Equity: Large Blend [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 1,025 | 957 |  |
Mutual-funds-Equity: Technology [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 137 | 96 |  |
Mutual-funds-Equity: Technology [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 137 | 96 |  |
Mutual Funds: Long Government [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 46 | 48 |  |
Mutual Funds: Long Government [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 46 | 48 |  |
Mutual Funds-Fixed Income: Multi-Sector Bond [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 1,244 | 1,244 |  |
Mutual Funds-Fixed Income: Multi-Sector Bond [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 1,244 | 1,244 |  |
Mutual funds-Fixed Income: High Yield Bond [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 648 | 622 |  |
Mutual funds-Fixed Income: High Yield Bond [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 648 | 622 |  |
Mutual Funds: Intermediate Core Bond [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 656 | 670 |  |
Mutual Funds: Intermediate Core Bond [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 656 | 670 |  |
Stock: BCB Common Stock [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 666 | 932 |  |
Stock: BCB Common Stock [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 666 | 932 |  |
Cash Equivalents: Money Market [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | 114 | 78 |  |
Cash Equivalents: Money Market [Member] | (Level 1) Quoted Prices in Active Markets for Identical Assets [Member] |  |  |  |
Defined Benefit Plan Fair Value Of Plan Assets [Line Item] |  |  |  |
Fair value of plan assets | $ 114 | $ 78 |  |

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