Investment Securities (Schedule of amortized cost, gross unrealized gains and losses and fair values of available for sale securities) (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		$ 102,807	$ 115,080
Gross Unrealized Gains		2,470	613
Gross Unrealized Losses		(139)	(861)
Fair Value		105,138	114,832
U.S. government agency mortgage-backed securities-residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		93,577	98,842
Gross Unrealized Gains		2,235	464
Gross Unrealized Losses		(124)	(828)
Fair Value		95,688	98,478
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		5,018	12,049
Gross Unrealized Gains		161	53
Gross Unrealized Losses		0	(26)
Fair Value		5,179	12,076
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	[1]	1,383	1,384
Gross Unrealized Gains	[1]	25	17
Gross Unrealized Losses	[1]	0	(5)
Fair Value	[1]	1,408	1,396
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		2,250	2,250
Gross Unrealized Gains		33	25
Gross Unrealized Losses		(15)	(2)
Fair Value		2,268	2,273
Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		579	555
Gross Unrealized Gains		16	54
Gross Unrealized Losses		0
Fair Value		$ 595	$ 609

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