Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Summary of investment securities
Available-for-sale Securities and Regulatory Stock, Amortized Cost	$ 134,924	$ 141,589
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Gains	2,197	78
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Losses	665	4,744
Available-for-sale securities and Regulatory Stock, Fair Value	136,456	136,923
U.S. Government agencies and corporations
Summary of investment securities
Available-for-sale Securities and Regulatory Stock, Amortized Cost	3,348	9,242
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Gains	1	11
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Losses		251
Available-for-sale securities and Regulatory Stock, Fair Value	3,349	9,002
Obligations of states and political subdivisions
Summary of investment securities
Available-for-sale Securities and Regulatory Stock, Amortized Cost	67,958	53,187
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Gains	2,046	26
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Losses	20	1,555
Available-for-sale securities and Regulatory Stock, Fair Value	69,984	51,658
U.S. Government-sponsored mortgage-backed securities
Summary of investment securities
Available-for-sale Securities and Regulatory Stock, Amortized Cost	47,227	59,070
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Gains	41
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Losses	564	2,483
Available-for-sale securities and Regulatory Stock, Fair Value	46,704	56,587
U.S. Government-sponsored collateralized mortgage obligations
Summary of investment securities
Available-for-sale Securities and Regulatory Stock, Amortized Cost	9,498	12,112
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Gains	106	41
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Losses	41	177
Available-for-sale securities and Regulatory Stock, Fair Value	9,563	11,976
U.S. Government-guaranteed small business administration pools
Summary of investment securities
Available-for-sale Securities and Regulatory Stock, Amortized Cost	6,893	7,978
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Gains	3
Available-for-sale Securities and Regulatory Stock, Gross Unrealized Losses	40	278
Available-for-sale securities and Regulatory Stock, Fair Value	6,856	7,700
Federal Home Loan Bank (FHLB) stock
Summary of investment securities
Available-for-sale Securities and Regulatory Stock, Amortized Cost	2,609	2,355
Available-for-sale securities and Regulatory Stock, Fair Value	2,609	2,355
Federal Reserve Bank (FRB) stock
Summary of investment securities
Available-for-sale Securities and Regulatory Stock, Amortized Cost	226	226
Available-for-sale securities and Regulatory Stock, Fair Value	226	226
Total regulatory stock
Summary of investment securities
Available-for-sale Securities and Regulatory Stock, Amortized Cost	2,835	2,581
Available-for-sale securities and Regulatory Stock, Fair Value	$ 2,835	$ 2,581