SECURITIES - INVESTMENTS CLASSIFIED BY CONTRACTUAL MATURITY DATE (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Jun. 30, 2022
Available-for-sale
Amortized Cost	$ 286,731	$ 265,867
Due Within One Year	58,326
Due After One but within Five Years	207,028
Due After Five but within Ten Years	7,494
Due After Ten Years	$ 6,764
Available-for-Sale, Yield
Total amount (percent)	5.91%
Due within one year (percent)	8.26%
Due after one but within five years (percent)	5.40%
Due after five but within ten years (percent)	2.98%
Due after ten years (percent)	4.30%
Available-for-sale—Amortized Cost
Total Amount	$ 286,731
Due Within One Year	58,955
Due After One but within Five Years	212,520
Due After Five but within Ten Years	8,281
Due After Ten Years	$ 6,975
Available-for-Sale, Amortized Cost, Percentage Yield
Total amount (percent)	5.89%
Due within one year (percent)	8.26%
Due after one but within five years (percent)	5.40%
Due after five but within ten years (percent)	2.98%
Due after ten years (percent)	4.30%
Fair Value
Available-for-sale
Amortized Cost	$ 279,612
Due Within One Year	58,326
Due After One but within Five Years	207,028
Due After Five but within Ten Years	7,494
Due After Ten Years	$ 6,764
Available-for-Sale, Yield
Total amount (percent)	5.91%
Due within one year (percent)	8.26%
Due after one but within five years (percent)	5.40%
Due after five but within ten years (percent)	2.98%
Due after ten years (percent)	4.30%
U.S. agencies
Available-for-sale
Amortized Cost	$ 25,620	27,722
Due Within One Year	5,087
Due After One but within Five Years	12,293
Due After Five but within Ten Years	6,459
Due After Ten Years	$ 1,781
Available-for-Sale, Yield
Total amount (percent)	2.10%
Due within one year (percent)	2.05%
Due after one but within five years (percent)	2.09%
Due after five but within ten years (percent)	2.18%
Due after ten years (percent)	1.99%
Non-agency
Available-for-sale
Amortized Cost	$ 210,487	187,616
Due Within One Year	6,868
Due After One but within Five Years	200,227
Due After Five but within Ten Years	1,822
Due After Ten Years	$ 1,570
Available-for-Sale, Yield
Total amount (percent)	5.58%
Due within one year (percent)	4.13%
Due after one but within five years (percent)	5.61%
Due after five but within ten years (percent)	5.84%
Due after ten years (percent)	8.59%
Total MBS
Available-for-sale
Amortized Cost	$ 236,107	215,338
Due Within One Year	11,955
Due After One but within Five Years	212,520
Due After Five but within Ten Years	8,281
Due After Ten Years	$ 3,351
Available-for-Sale, Yield
Total amount (percent)	5.20%
Due within one year (percent)	3.25%
Due after one but within five years (percent)	5.40%
Due after five but within ten years (percent)	2.98%
Due after ten years (percent)	5.08%
Municipal
Available-for-sale
Amortized Cost	$ 3,624	3,529
Due Within One Year	0
Due After One but within Five Years	0
Due After Five but within Ten Years	0
Due After Ten Years	$ 3,624
Available-for-Sale, Yield
Total amount (percent)	3.57%
Due within one year (percent)	0.00%
Due after one but within five years (percent)	0.00%
Due after five but within ten years (percent)	0.00%
Due after ten years (percent)	3.57%
Asset-backed securities and structured notes
Available-for-sale
Amortized Cost	$ 47,000	47,000
Due Within One Year	47,000
Due After One but within Five Years	0
Due After Five but within Ten Years	0
Due After Ten Years	$ 0
Available-for-Sale, Yield
Total amount (percent)	9.53%
Due within one year (percent)	9.53%
Due after one but within five years (percent)	0.00%
Due after five but within ten years (percent)	0.00%
Due after ten years (percent)	0.00%
Total Non-MBS
Available-for-sale
Amortized Cost	$ 50,624	$ 50,529
Due Within One Year	47,000
Due After One but within Five Years	0
Due After Five but within Ten Years	0
Due After Ten Years	$ 3,624
Available-for-Sale, Yield
Total amount (percent)	9.10%
Due within one year (percent)	9.53%
Due after one but within five years (percent)	0.00%
Due after five but within ten years (percent)	0.00%
Due after ten years (percent)	3.57%