Securities - Available-for-sale Securities by Contractual Maturity (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
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	31,111,000
Securities Available for Sale, Due from five years to ten years, Amortized Cost	14,567,000
Securities Available for Sale, Due after ten years, Amortized Cost	52,666,000
Securities Available for Sale, Amortized Cost	98,344,000
Amortized Cost	198,944,000	$ 204,217,000
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	30,930,000
Securities Available for Sale, Due from five years to ten years, Fair Value	14,352,000
Securities Available for Sale, Due after ten years, Fair Value	53,409,000
Securities Available for Sale, Fair Value	98,691,000
Securities available for sale	198,272,685	$ 201,687,683
Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities, Amortized Cost	100,600,000
Mortgage-backed securities, Fair Value	$ 99,582,000