Securities, Components of Securities (Details) $ in Thousands	9 Months Ended
	Mar. 31, 2023 USD ($) Category	Jun. 30, 2022 USD ($)
Available-for-sale debt securities [Abstract]
Amortized cost	$ 342,769	$ 431,625
Gross unrealized gains	635	374
Gross unrealized losses	26,540	23,937
Estimated fair value	316,864	408,062
Held-to-maturity securities [Abstract]
Amortized cost	736,983	761,852
Gross unrealized gains	4,081	2,779
Gross unrealized losses	55,171	54,178
Estimated fair value	685,893	710,453
Total Securities [Abstract]
Amortized cost	1,079,752	1,193,477
Gross unrealized gains	4,716	3,153
Gross unrealized losses	81,711	78,115
Estimated fair value	$ 1,002,757	1,118,515
Number of categories utilized under risk management approach of diversified investing | Category	3
U.S. Government Sponsored Enterprises [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	$ 13,058	13,066
Gross unrealized gains	0	0
Gross unrealized losses	2,054	1,747
Estimated fair value	11,004	11,319
U.S. Treasury Securities [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	18,377	20,158
Gross unrealized gains	0	0
Gross unrealized losses	1,712	1,731
Estimated fair value	16,665	18,427
Held-to-maturity securities [Abstract]
Amortized cost	33,684	33,623
Gross unrealized gains	0	0
Gross unrealized losses	2,071	1,643
Estimated fair value	31,613	31,980
State and Political Subdivisions [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	171,980	247,978
Gross unrealized gains	635	374
Gross unrealized losses	22	276
Estimated fair value	172,593	248,076
Held-to-maturity securities [Abstract]
Amortized cost	484,093	493,897
Gross unrealized gains	4,081	2,760
Gross unrealized losses	29,051	35,747
Estimated fair value	459,123	460,910
Mortgage-backed Securities-Residential [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	30,335	33,186
Gross unrealized gains	0	0
Gross unrealized losses	3,801	3,289
Estimated fair value	26,534	29,897
Held-to-maturity securities [Abstract]
Amortized cost	38,417	42,461
Gross unrealized gains	0	1
Gross unrealized losses	3,089	2,242
Estimated fair value	35,328	40,220
Mortgage-backed Securities-Multi-family [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	91,113	99,353
Gross unrealized gains	0	0
Gross unrealized losses	17,500	15,644
Estimated fair value	73,613	83,709
Held-to-maturity securities [Abstract]
Amortized cost	159,113	171,921
Gross unrealized gains	0	2
Gross unrealized losses	18,286	13,895
Estimated fair value	140,827	158,028
Corporate Debt Securities [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	17,906	17,884
Gross unrealized gains	0	0
Gross unrealized losses	1,451	1,250
Estimated fair value	16,455	16,634
Held-to-maturity securities [Abstract]
Amortized cost	21,637	19,900
Gross unrealized gains	0	16
Gross unrealized losses	2,674	651
Estimated fair value	18,963	19,265
Other Securities [Member]
Held-to-maturity securities [Abstract]
Amortized cost	39	50
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	$ 39	$ 50