Securities (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2022 USD ($) Category	Jun. 30, 2021 USD ($)
Securities [Abstract]
Number of categories utilized under risk management approach of diversified investing | Category	3
Available-for-sale debt securities [Abstract]
Amortized cost	$ 431,625	$ 390,415
Gross unrealized gains	374	1,879
Gross unrealized losses	23,937	1,404
Estimated fair value	408,062	390,890
Held-to-maturity securities [Abstract]
Amortized cost	761,852	496,914
Gross unrealized gains	2,779	22,600
Gross unrealized losses	54,178	472
Estimated fair value	710,453	519,042
Total Securities [Abstract]
Amortized cost	1,193,477	887,329
Gross unrealized gains	3,153	24,479
Gross unrealized losses	78,115	1,876
Estimated fair value	1,118,515	909,932
U.S. Government Sponsored Enterprises [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	13,066	13,079
Gross unrealized gains	0	36
Gross unrealized losses	1,747	212
Estimated fair value	11,319	12,903
U.S. Treasury Securities [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	20,158	19,672
Gross unrealized gains	0	165
Gross unrealized losses	1,731	1
Estimated fair value	18,427	19,836
Held-to-maturity securities [Abstract]
Amortized cost	33,623	10,938
Gross unrealized gains	0	28
Gross unrealized losses	1,643	2
Estimated fair value	31,980	10,964
State and Political Subdivisions [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	247,978	200,436
Gross unrealized gains	374	220
Gross unrealized losses	276	0
Estimated fair value	248,076	200,656
Held-to-maturity securities [Abstract]
Amortized cost	493,897	341,364
Gross unrealized gains	2,760	17,184
Gross unrealized losses	35,747	303
Estimated fair value	460,910	358,245
Mortgage-backed Securities-Residential [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	33,186	34,861
Gross unrealized gains	0	287
Gross unrealized losses	3,289	167
Estimated fair value	29,897	34,981
Held-to-maturity securities [Abstract]
Amortized cost	42,461	28,450
Gross unrealized gains	1	584
Gross unrealized losses	2,242	90
Estimated fair value	40,220	28,944
Mortgage-backed Securities-Multi-Family [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	99,353	119,359
Gross unrealized gains	0	1,042
Gross unrealized losses	15,644	994
Estimated fair value	83,709	119,407
Held-to-maturity securities [Abstract]
Amortized cost	171,921	100,330
Gross unrealized gains	2	4,635
Gross unrealized losses	13,895	12
Estimated fair value	158,028	104,953
Corporate Debt Securities [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	17,884	3,008
Gross unrealized gains	0	129
Gross unrealized losses	1,250	30
Estimated fair value	16,634	3,107
Held-to-maturity securities [Abstract]
Amortized cost	19,900	9,892
Gross unrealized gains	16	111
Gross unrealized losses	651	65
Estimated fair value	19,265	9,938
Other Securities [Member]
Held-to-maturity securities [Abstract]
Amortized cost	50	5,940
Gross unrealized gains	0	58
Gross unrealized losses	0	0
Estimated fair value	$ 50	$ 5,998