Investment Securities (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) security shares	Jun. 30, 2019 USD ($) security	Jun. 30, 2020 USD ($) security shares	Jun. 30, 2019 USD ($) security	Dec. 31, 2019 USD ($) security shares
Schedule of Investments [Line Items]
Number of securities in unrealized losses less than twelve months category | security	6		6
Number of securities in unrealized losses twelve months or more category | security	7		7
Unrealized gain (loss) on equity securities | $	$ 18	$ (1)	$ (18)	$ 35
Municipal bonds [Member] | Securities Pledged As Collateral Agreement With Federal Reserve Bank Of New York [Member]
Schedule of Investments [Line Items]
Investment owned balance, positions | security	32		32		33
Investment owned, at cost | $	$ 10,800		$ 10,800		$ 10,900
Investment owned, at fair value | $	$ 11,200		$ 11,200		$ 11,200
Municipal bonds [Member] | SecuritiesPledged As Collateral For Customer Deposits [Member]
Schedule of Investments [Line Items]
Investment owned balance, positions | security	16		16		16
Investment owned, at cost | $	$ 3,500		$ 3,500		$ 3,600
Investment owned, at fair value | $	$ 3,600		$ 3,600		$ 3,700
Debt Securities [Member]
Schedule of Investments [Line Items]
Number of securities sold | security			0	0
Equity Securities [Member]
Schedule of Investments [Line Items]
Number of securities sold | security	0	0	0	0
Unrealized gain (loss) on equity securities | $	$ 18	$ (1)	$ (18)	$ 35
Equity Securities [Member] | Federal Home Loan Mortgage Corporation [Member]
Schedule of Investments [Line Items]
Equity securities common stock shares owned | shares	22,368		22,368		22,368