Other Real Estate Owned ("OREO") (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt and Equity Securities, FV-NI [Line Items]
Additions of underlying property	$ 3,567,000	$ 307,000
Operating expenses	250,000	117,000	$ 146,000
Loans from other federal home loan banks	280,000
Implaired loans secured by residential real estate	0	0
Valuation allowance	901,000	532,000	$ 600,000
Residential Lots [Member]
Debt and Equity Securities, FV-NI [Line Items]
Operating expenses	146,000
Proceeds from sale of OREO	63,000	190,000
Gains (losses) on sale of OREO	(2,000)	(12,000)
Commercial Real Estate [Member]
Debt and Equity Securities, FV-NI [Line Items]
Additions of underlying property	3,400,000	142,000
Proceeds from sale of OREO	3,100,000	807,000
Gains (losses) on sale of OREO	190,000	4,000
Commercial equipment	$ 35,000
Other investments		$ 165,000