Securities - Realized Gains and Losses (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) security	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Schedule of Investments [Line Items]
Realized gains	$ 296,000	$ 0
Realized losses	0	0
Total debt securities available for sale	296,000	0
Net gains on sales of securities	296,000	$ 0
Securities realized gain (loss)	11,000
Available-for-sale securities pledged as collateral	$ 3,500,000		$ 4,000,000
1 Corporate Bond | Corporate Bond Securities
Schedule of Investments [Line Items]
Number of securities sold | security	1
Book value of securities sold	$ 2,200,000
Securities realized gain (loss)	$ 61,000
3 Mortgage Backed Securities | Commercial mortgage-backed securities
Schedule of Investments [Line Items]
Number of securities sold | security	3
Book value of securities sold	$ 2,800,000
Securities realized gain (loss)	$ 57,000
1 Security Sold | Municipal Securities
Schedule of Investments [Line Items]
Number of securities sold | security	1
Book value of securities sold	$ 381,000
Securities realized gain (loss)	$ 27,000
1 Security Sold | Taxable Municipal Securities
Schedule of Investments [Line Items]
Number of securities sold | security	1
Book value of securities sold	$ 456,000
Securities realized gain (loss)	$ 140,000
1 Security Called | Municipal Securities
Schedule of Investments [Line Items]
Number of securities sold | security	1
Book value of securities sold	$ 485,000