Securities - Schedule of available for sale securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Other securities
Available-for-sale Securities, Amortized Cost Basis	$ 15,376	$ 7,919
Available for sale Securities Gross Unrealized Gain	267	48
Available For Sale Securities Gross Unrealized Losses	(334)	(343)
Available-for-sale Securities Estimated Fair Value	15,309	7,624
Mortgage-backed securities
Available-for-sale Securities, Amortized Cost Basis	113,553	122,375
Available for sale Securities Gross Unrealized Gain	3,868	4,576
Available For Sale Securities Gross Unrealized Losses	(58)	(39)
Available-for-sale Securities Estimated Fair Value	117,363	126,912
Total investments and mortgage-backed securities
Available-for-sale Securities, Amortized Cost Basis	175,714	170,780
Available for sale Securities Gross Unrealized Gain	5,824	6,126
Available For Sale Securities Gross Unrealized Losses	(392)	(382)
Available-for-sale Securities Estimated Fair Value	181,146	176,524
State and political subdivisions
Available-for-sale Securities, Amortized Cost Basis	46,785	40,486
Available for sale Securities Gross Unrealized Gain	1,689	1,502
Available-for-sale Securities Estimated Fair Value	$ 48,474	$ 41,988