Securities - Realized Gains and Losses (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) security	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Schedule of Investments [Line Items]
Realized gains	$ 16	$ 0	$ 317	$ 0
Realized losses	0	$ 0	0	$ 0
Total debt securities available for sale	16		317
Net gains on sales of securities	16		317
Securities realized gain (loss)			16
Available-for-sale securities pledged as collateral	2,000		$ 2,000		$ 4,000
2 Corporate Bond | Corporate Bond Securities
Schedule of Investments [Line Items]
Number of securities sold | security			2
Book value of securities sold	2,700		$ 2,700
Securities realized gain (loss)			$ 77
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		$ 2,800
Securities realized gain (loss)			$ 57
1 Security Sold | Municipal Securities
Schedule of Investments [Line Items]
Number of securities sold | security			1
Book value of securities sold	381		$ 381
Securities realized gain (loss)			$ 27
1 Security Sold | Taxable Municipal Securities
Schedule of Investments [Line Items]
Number of securities sold | security			1
Book value of securities sold	456		$ 456
Securities realized gain (loss)			$ 140
1 Security Called | Municipal Securities
Schedule of Investments [Line Items]
Number of securities sold | security			3
Book value of securities sold	$ 1,800		$ 1,800