Leases - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Apr. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Right-of-use assets	$ 5,520
Lease liabilities	$ 5,542
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Right-of-use assets			$ 4,400
Lease liabilities			$ 4,400
HomeTown Bankshares Corporation Merger
Lessee, Lease, Description [Line Items]
Right-of-use assets		$ 1,800
Lease liabilities		$ 1,800