Off- Balance Sheet Activities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risk, allowance	$ 380	$ 318
Commitment to make loans, maximum term	90 days
Commitments to make loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet exposure, fixed rates	$ 26,088	16,276
Off-balance sheet exposure, variable rates	12,778	20,128
Unused lines of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet exposure, fixed rates	37,051	28,723
Off-balance sheet exposure, variable rates	348,460	288,086
Unused standby letters of credit and commercial letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet exposure, fixed rates	4,327	4,895
Off-balance sheet exposure, variable rates	$ 2,028	$ 0
Minimum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed rate loan commitments, interest rate	2.80%
Fixed rate loan commitments, maturity	8 years
Maximum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed rate loan commitments, interest rate	9.00%
Fixed rate loan commitments, maturity	30 years

Loans and Leases Receivable, Commitments, Fixed Rates, Maturities

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Loans And Leases Receivable, Commitments, Fixed Rates, Percent

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Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates.

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-Publisher FASB
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