Premises and Equipment - Components (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Property, Plant and Equipment [Line Items]
Gross value	$ 17,657	$ 20,605
Accumulated depreciation	(4,114)	(3,872)
Net book value	13,543	16,733
Land
Property, Plant and Equipment [Line Items]
Gross value	2,581	4,144
Office buildings and improvements
Property, Plant and Equipment [Line Items]
Gross value	12,701	14,493
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Gross value	2,325	1,918
Automobiles
Property, Plant and Equipment [Line Items]
Gross value	$ 50	$ 50