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Securities - Available-for-sale Securities by Contractual Maturity (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Securities Available for Sale, Due in one year or less, Amortized Cost	$ 0
Securities Available for Sale, Due from one year to five years, Amortized Cost	21,555,000
Securities Available for Sale, Due from five years to ten years, Amortized Cost	14,608,000
Securities Available for Sale, Due after ten years, Amortized Cost	34,378,000
Securities Available for Sale, Debt Securities, Amortized Cost	70,541,000
Amortized Cost	177,915,000	$ 153,566,000
Securities Available for Sale, Due in one year or less, Fair Value	0
Securities Available for Sale, Due from one year to five years, Fair Value	20,879,000
Securities Available for Sale, Due from five years to ten years, Fair Value	13,817,000
Securities Available for Sale, Due after ten years, Fair Value	33,825,000
Securities Available for Sale, Debt Securities, Fair Value	68,521,000
Securities available for sale	173,038,716	$ 151,944,567
Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Securities Available for Sale, Mortgage-backed securities, Amortized Cost	107,374,000
Securities Available for Sale, Mortgage-backed securities, Fair Value	$ 104,518,000

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Representing the available securities for sale before without single maturity date amortized cost.

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