Investment Securities - Narrative (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) security	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Investments, Debt and Equity Securities [Abstract]
Number of individual securities that were in a continuous unrealized loss position for less than twelve months (in securities) | security	24
Number of individual securities that were in a continuous unrealized loss position for greater than twelve months (in securities) | security	9
Gross proceeds from sales of securities	$ 2,774,000	$ 6,986,000
Impairment charges	0	$ 0
Carrying value of investment securities pledged	87,695,000		$ 74,163,000
Fair value	$ 1,281,000		$ 1,261,000