Fair Value of Financial Instruments - Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Investments available for sale:
Equity securities	$ 2,635
Fair value	127,007	$ 123,335
Mortgage-backed securities
Investments available for sale:
Fair value	50,449	55,064
U.S. agency collateralized mortgage obligations
Investments available for sale:
Fair value	14,625	15,433
U.S. government agency securities
Investments available for sale:
Fair value	6,233	6,896
Municipal bonds
Investments available for sale:
Fair value	19,564	19,861
Corporate bonds
Investments available for sale:
Fair value	36,136	26,081
Recurring
Investments available for sale:
Equity securities	2,635
Fair value	129,642
Fair value		123,335
Recurring | Mortgage-backed securities
Investments available for sale:
Fair value	50,449	55,064
Recurring | U.S. agency collateralized mortgage obligations
Investments available for sale:
Fair value	14,625	15,433
Recurring | U.S. government agency securities
Investments available for sale:
Fair value	6,233	6,896
Recurring | Municipal bonds
Investments available for sale:
Fair value	19,564	19,861
Recurring | Corporate bonds
Investments available for sale:
Fair value	36,136	26,081
Recurring | Level 1
Investments available for sale:
Equity securities	2,635
Fair value	2,635
Recurring | Level 2
Investments available for sale:
Fair value	127,007
Fair value		123,335
Recurring | Level 2 | Mortgage-backed securities
Investments available for sale:
Fair value	50,449	55,064
Recurring | Level 2 | U.S. agency collateralized mortgage obligations
Investments available for sale:
Fair value	14,625	15,433
Recurring | Level 2 | U.S. government agency securities
Investments available for sale:
Fair value	6,233	6,896
Recurring | Level 2 | Municipal bonds
Investments available for sale:
Fair value	19,564	19,861
Recurring | Level 2 | Corporate bonds
Investments available for sale:
Fair value	$ 36,136	$ 26,081