Securities, Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2023 USD ($) Security	Sep. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) Security
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 7,625		$ 6,268
More than 12 months, fair value	134,574		136,936
Total, fair value	142,199		143,204
Less than 12 months, unrealized losses	115		308
More than 12 months, unrealized losses	33,563		28,382
Total, unrealized losses	$ 33,678		$ 28,690
Less than 12 months, number of securities | Security	6		12
More than 12 months, number of securities | Security	86		78
Total, number of securities | Security	92		90
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 71,704		$ 57,992
More than 12 months, fair value	498,042		495,655
Total, fair value	569,746		553,647
Less than 12 months, unrealized losses	2,989		2,897
More than 12 months, unrealized losses	79,007		57,578
Total, unrealized losses	$ 81,996		$ 60,475
Less than 12 months, number of securities | Security	657		471
More than 12 months, number of securities | Security	2,318		2,108
Total, number of securities | Security	2,975		2,579
Total Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 79,329		$ 64,260
More than 12 months, fair value	632,616		632,591
Total, fair value	711,945		696,851
Less than 12 months, unrealized losses	3,104		3,205
More than 12 months, unrealized losses	112,570		85,960
Total, unrealized losses	$ 115,674		$ 89,165
Less than 12 months, number of securities | Security	663		483
More than 12 months, number of securities | Security	2,404		2,186
Total, number of securities | Security	3,067		2,669
Available for sale securities transferred at fair value to held to maturity	$ 0	$ 0
Gross realized gains (losses) on sale of available-for-sale securities	0	0
Proceeds from sale of available-for-sale securities	0	$ 0
U.S. Government Sponsored Enterprises [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	0		$ 0
More than 12 months, fair value	10,467		10,823
Total, fair value	10,467		10,823
Less than 12 months, unrealized losses	0		0
More than 12 months, unrealized losses	2,584		2,231
Total, unrealized losses	$ 2,584		$ 2,231
Less than 12 months, number of securities | Security	0		0
More than 12 months, number of securities | Security	5		5
Total, number of securities | Security	5		5
U.S. Treasury Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 756		$ 761
More than 12 months, fair value	15,452		15,739
Total, fair value	16,208		16,500
Less than 12 months, unrealized losses	63		57
More than 12 months, unrealized losses	2,050		1,792
Total, unrealized losses	$ 2,113		$ 1,849
Less than 12 months, number of securities | Security	2		2
More than 12 months, number of securities | Security	6		6
Total, number of securities | Security	8		8
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0		$ 0
More than 12 months, fair value	31,201		31,267
Total, fair value	31,201		31,267
Less than 12 months, unrealized losses	0		0
More than 12 months, unrealized losses	2,525		2,438
Total, unrealized losses	$ 2,525		$ 2,438
Less than 12 months, number of securities | Security	0		0
More than 12 months, number of securities | Security	8		8
Total, number of securities | Security	8		8
State and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 5,022		$ 0
More than 12 months, fair value	81		82
Total, fair value	5,103		82
Less than 12 months, unrealized losses	3		0
More than 12 months, unrealized losses	2		2
Total, unrealized losses	$ 5		$ 2
Less than 12 months, number of securities | Security	3		0
More than 12 months, number of securities | Security	1		1
Total, number of securities | Security	4		1
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 64,946		$ 40,412
More than 12 months, fair value	293,513		295,479
Total, fair value	358,459		335,891
Less than 12 months, unrealized losses	1,994		520
More than 12 months, unrealized losses	46,805		30,142
Total, unrealized losses	$ 48,799		$ 30,662
Less than 12 months, number of securities | Security	649		448
More than 12 months, number of securities | Security	2,215		2,018
Total, number of securities | Security	2,864		2,466
Mortgage-backed Securities-Residential [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0		$ 476
More than 12 months, fair value	23,592		25,125
Total, fair value	23,592		25,601
Less than 12 months, unrealized losses	0		29
More than 12 months, unrealized losses	5,069		3,956
Total, unrealized losses	$ 5,069		$ 3,985
Less than 12 months, number of securities | Security	0		7
More than 12 months, number of securities | Security	27		21
Total, number of securities | Security	27		28
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 5		$ 1,982
More than 12 months, fair value	31,415		31,579
Total, fair value	31,420		33,561
Less than 12 months, unrealized losses	0		120
More than 12 months, unrealized losses	4,507		3,505
Total, unrealized losses	$ 4,507		$ 3,625
Less than 12 months, number of securities | Security	2		12
More than 12 months, number of securities | Security	27		18
Total, number of securities | Security	29		30
Mortgage-backed Securities-Multi-family [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0		$ 2,679
More than 12 months, fair value	68,884		69,407
Total, fair value	68,884		72,086
Less than 12 months, unrealized losses	0		182
More than 12 months, unrealized losses	22,034		18,748
Total, unrealized losses	$ 22,034		$ 18,930
Less than 12 months, number of securities | Security	0		1
More than 12 months, number of securities | Security	31		30
Total, number of securities | Security	31		31
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0		$ 5,362
More than 12 months, fair value	129,364		129,360
Total, fair value	129,364		134,722
Less than 12 months, unrealized losses	0		245
More than 12 months, unrealized losses	23,140		20,079
Total, unrealized losses	$ 23,140		$ 20,324
Less than 12 months, number of securities | Security	0		2
More than 12 months, number of securities | Security	55		54
Total, number of securities | Security	55		56
Corporate Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 1,847		$ 2,352
More than 12 months, fair value	16,098		15,760
Total, fair value	17,945		18,112
Less than 12 months, unrealized losses	49		40
More than 12 months, unrealized losses	1,824		1,653
Total, unrealized losses	$ 1,873		$ 1,693
Less than 12 months, number of securities | Security	1		2
More than 12 months, number of securities | Security	16		15
Total, number of securities | Security	17		17
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 6,753		$ 10,236
More than 12 months, fair value	12,549		7,970
Total, fair value	19,302		18,206
Less than 12 months, unrealized losses	995		2,012
More than 12 months, unrealized losses	2,030		1,414
Total, unrealized losses	$ 3,025		$ 3,426
Less than 12 months, number of securities | Security	6		9
More than 12 months, number of securities | Security	13		10
Total, number of securities | Security	19		19