Investments - Narrative (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($) security
Investments, Debt and Equity Securities [Abstract]
Investments with unrealized losses of less than one year | security	14	13
Investments with unrealized losses of more than one year | security	2	10
Number of securities pledged and held at FHLB | security	7	7
Pledged securities for FHLB	$ 6,900,000	$ 7,400,000
Public deposits	11,400,000	10,300,000
Collateral requirement	4,100,000	4,000,000
Other than temporary impairment losses, investments	$ 0	$ 0