Investment Securities (Schedule of amortized cost, gross unrealized gains and losses and fair values of available for sale securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020		Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 112,081		$ 115,080
Gross Unrealized Gains	3,100		613
Gross Unrealized Losses	(47)		(861)
Fair Value	115,134		114,832
U.S. government agency mortgage-backed securities-residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	102,887		98,842
Gross Unrealized Gains	2,819		464
Gross Unrealized Losses	(7)		(828)
Fair Value	105,699		98,478
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,021		12,049
Gross Unrealized Gains	176		53
Gross Unrealized Losses	0		(26)
Fair Value	5,197		12,076
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,383	[1]	1,384
Gross Unrealized Gains	17	[1]	17
Gross Unrealized Losses	(25)	[1]	(5)
Fair Value	1,375	[1]	1,396
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,250		2,250
Gross Unrealized Gains	34		25
Gross Unrealized Losses	(15)		(2)
Fair Value	2,269		2,273
Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	540		555
Gross Unrealized Gains	54		54
Gross Unrealized Losses	0
Fair Value	$ 594		$ 609

[1] 1The issuers of municipal securities are all within New York State.