Investment Securities, Maturities (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Available-for-Sale, Amortized Cost
Due within one year	$ 9,983,000
Due from one to five years	63,472,000
Due from five to ten years	30,291,000
Due after ten years	1,704,000
Amortized Cost Basis	105,450,000
Amortized Cost	190,115,000	$ 244,283,000
Available-for-Sale, Fair Value
Due within one year	9,981,000
Due from one to five years	63,712,000
Due from five to ten years	30,756,000
Due after ten years	1,719,000
Total available-for-sale, maturities	106,168,000
Fair Value	191,230,000	238,421,000
Held-to-Maturity, Amortized Cost
Due within one year	2,535,000
Due from one to five years	7,876,000
Due from five to ten years	8,495,000
Due after ten years	15,125,000
Amortized Cost	34,031,000	29,721,000
Held-to-Maturity, Fair Value
Due within one year	2,539,000
Due from one to five years	7,994,000
Due from five to ten years	8,511,000
Due after ten years	15,372,000
Held-to-maturity, fair value	34,416,000	29,024,000
Available-for-sale securities pledged as collateral	166,744,000	106,568,000
U.S. Agency mortgage-backed securities [Member]
Available-for-Sale, Amortized Cost
Amortized Cost	84,665,000	57,584,000
Available-for-Sale, Fair Value
Fair Value	85,062,000	$ 55,610,000
Held-to-Maturity, Amortized Cost
Amortized Cost	0
Held-to-Maturity, Fair Value
Held-to-maturity, fair value	$ 0