Loans - Additional information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loans
Real estate-construction loans, percentage	5.40%	4.90%
Loan balances net of unearned income	$ 406	$ 384

Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Name:	us-gaap_LoansAndLeasesReceivableDeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant