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Regulatory Matters (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2018
Federal Reserve Bank Of New York [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Reserve requirement | $ 6.4 |  | $ 5.5
Subordinated Notes Due April 15, 2030 [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Tier 2 capital | 39.3 |  |
Preferred Equity [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Tier 1 capital | $ 17.3 |  |
Fully Phased-in [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Capital Conservation Buffer | 2.50% |  |
Phase-in Schedule [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Capital Conservation Buffer | 0.625% |  |
Minimum [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
CET1 capital, For Capital Adequacy Purposes, Ratio | 4.50% |  |
Tier 1 capital, For Capital Adequacy Purposes, Ratio | 6.00% |  |
Total risk-based capital, For Capital Adequacy Purposes, Ratio | 8.00% |  |
Minimum [Member] | Fully Phased-in [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
CET1 capital, For Capital Adequacy Purposes, Ratio | 7.00% |  |
Tier 1 capital, For Capital Adequacy Purposes, Ratio | 8.50% |  |
Total risk-based capital, For Capital Adequacy Purposes, Ratio | 10.50% |  |
Tier 1 leverage, For Capital Adequacy Purposes, Ratio | 4.00% |  |
Community Bank Leverage Ratio [Member] | Bank Maintains More Than Community Bank Leverage Ratio Percent [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Percentage of adequate CBLR to be maintained for qualifying and not qualifying community banking organizations |  | 9.00% |
Community Bank Leverage Ratio [Member] | Bank Does Not Maintain More Than Community Bank Leverage Ratio Percent [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Percentage of adequate CBLR to be maintained for qualifying and not qualifying community banking organizations |  | 9.00% |
Community Bank Leverage Ratio [Member] | Minimum [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Percentage of community bank leverage ratio | 8.00% |  |
Community Bank Leverage Ratio [Member] | Maximum [Member] |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Percentage of community bank leverage ratio | 10.00% |  |

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