Regulatory Matters (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Preferred Equity [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital	$ 17,300
Federal Reserve Bank Of New York [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Reserve requirement		$ 629
Phase-in Schedule [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital Conservation Buffer	0.625%
Fully Phased-in [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital Conservation Buffer	2.50%
Subordinated Notes Due April 15, 2030 [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 2 capital	$ 39,100
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%