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LOANS RECEIVABLE - Credit-Rating Classification of Loans Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Total loans
Originated current fiscal year	$ 256,053		$ 256,053		$ 368,683
Originated fiscal year before current fiscal year	369,758		369,758		946,697
Originated two years before current fiscal year	918,734		918,734		1,627,496
Originated three years before current fiscal year	1,595,028		1,595,028		881,973
Originated four years before current fiscal year	854,906		854,906		333,600
Originated more than five years before current fiscal year	1,710,363		1,710,363		1,502,747
Revolving loans	95,458		95,458		87,554
Financing receivable, before allowance for credit loss, fee and loan in process	5,800,300		5,800,300		5,748,750
Total current period gross charge-offs
Originated current fiscal year, writeoff			0		0
Originated fiscal year before current fiscal year, writeoff			0		0
Originated two years before current fiscal year, writeoff			0		0
Originated three years before current fiscal year, writeoff			0		3,391
Originated four years before current fiscal year, writeoff			0		464
Originated more than five years before current fiscal year, writeoff			709		6,421
Revolving loans, writeoff			0		0
Total	580	$ 4,238	709	$ 6,460	10,276
Commercial
Total loans
Financing receivable, before allowance for credit loss, fee and loan in process	3,985,261		3,985,261		3,945,910
Commercial | Multi-family mortgage
Total loans
Originated current fiscal year	94,993		94,993		26,683
Originated fiscal year before current fiscal year	26,561		26,561		596,321
Originated two years before current fiscal year	612,266		612,266		949,690
Originated three years before current fiscal year	940,459		940,459		229,420
Originated four years before current fiscal year	230,430		230,430		201,611
Originated more than five years before current fiscal year	817,914		817,914		642,126
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	2,722,623		2,722,623		2,645,851
Total current period gross charge-offs
Originated current fiscal year, writeoff			0		0
Originated fiscal year before current fiscal year, writeoff			0		0
Originated two years before current fiscal year, writeoff			0		0
Originated three years before current fiscal year, writeoff			0		0
Originated four years before current fiscal year, writeoff			0		0
Originated more than five years before current fiscal year, writeoff			0		398
Revolving loans, writeoff			0		0
Total	0	354	0	354	398
Commercial | Nonresidential mortgage
Total loans
Originated current fiscal year	49,943		49,943		87,380
Originated fiscal year before current fiscal year	82,077		82,077		105,768
Originated two years before current fiscal year	104,404		104,404		199,829
Originated three years before current fiscal year	196,849		196,849		91,626
Originated four years before current fiscal year	110,827		110,827		44,598
Originated more than five years before current fiscal year	406,094		406,094		418,844
Revolving loans	0		0		30
Financing receivable, before allowance for credit loss, fee and loan in process	950,194		950,194		948,075
Total current period gross charge-offs
Originated current fiscal year, writeoff			0
Originated fiscal year before current fiscal year, writeoff			0
Originated two years before current fiscal year, writeoff			0
Originated three years before current fiscal year, writeoff			0
Originated four years before current fiscal year, writeoff			0
Originated more than five years before current fiscal year, writeoff			498		5,975
Revolving loans, writeoff			0
Total	498	3,689	498	5,722	5,975
Commercial | Commercial business
Total loans
Originated current fiscal year	5,373		5,373		12,152
Originated fiscal year before current fiscal year	11,313		11,313		8,273
Originated two years before current fiscal year	6,698		6,698		29,174
Originated three years before current fiscal year	23,461		23,461		18,679
Originated four years before current fiscal year	15,943		15,943		6,104
Originated more than five years before current fiscal year	12,178		12,178		11,620
Revolving loans	60,774		60,774		56,745
Financing receivable, before allowance for credit loss, fee and loan in process	135,740		135,740		142,747
Total current period gross charge-offs
Originated current fiscal year, writeoff			0		0
Originated fiscal year before current fiscal year, writeoff			0		0
Originated two years before current fiscal year, writeoff			0		0
Originated three years before current fiscal year, writeoff			0		3,391
Originated four years before current fiscal year, writeoff			0		464
Originated more than five years before current fiscal year, writeoff			202		11
Revolving loans, writeoff			0		0
Total	75	158	202	347	3,866
Commercial | Construction
Total loans
Originated current fiscal year	17,486		17,486		54,711
Originated fiscal year before current fiscal year	77,573		77,573		45,180
Originated two years before current fiscal year	8,440		8,440		14,284
Originated three years before current fiscal year	10,360		10,360		83,078
Originated four years before current fiscal year	51,068		51,068		2,602
Originated more than five years before current fiscal year	6,042		6,042		3,647
Revolving loans	5,735		5,735		5,735
Financing receivable, before allowance for credit loss, fee and loan in process	176,704		176,704		209,237
Total current period gross charge-offs
Originated current fiscal year, writeoff			0		0
Originated fiscal year before current fiscal year, writeoff			0		0
Originated two years before current fiscal year, writeoff			0		0
Originated three years before current fiscal year, writeoff			0		0
Originated four years before current fiscal year, writeoff			0		0
Originated more than five years before current fiscal year, writeoff			0		0
Revolving loans, writeoff			0		0
Total	0	0	0	0	0
Residential
Total loans
Originated current fiscal year	86,804		86,804		185,034
Originated fiscal year before current fiscal year	169,908		169,908		185,246
Originated two years before current fiscal year	181,851		181,851		432,142
Originated three years before current fiscal year	421,770		421,770		458,696
Originated four years before current fiscal year	446,065		446,065		77,442
Originated more than five years before current fiscal year	458,687		458,687		417,200
Revolving loans	75		75		291
Financing receivable, before allowance for credit loss, fee and loan in process	1,765,160		1,765,160		1,756,051
Total current period gross charge-offs
Originated current fiscal year, writeoff			0		0
Originated fiscal year before current fiscal year, writeoff			0		0
Originated two years before current fiscal year, writeoff			0		0
Originated three years before current fiscal year, writeoff			0		0
Originated four years before current fiscal year, writeoff			0		0
Originated more than five years before current fiscal year, writeoff			2		37
Revolving loans, writeoff			0		0
Total	0	37	2	37	37
Consumer
Total loans
Financing receivable, before allowance for credit loss, fee and loan in process	49,879		49,879		46,789
Consumer | Home equity loans
Total loans
Originated current fiscal year	961		961		1,919
Originated fiscal year before current fiscal year	1,866		1,866		5,698
Originated two years before current fiscal year	4,870		4,870		2,173
Originated three years before current fiscal year	2,005		2,005		347
Originated four years before current fiscal year	323		323		1,019
Originated more than five years before current fiscal year	8,333		8,333		8,320
Revolving loans	28,743		28,743		24,628
Financing receivable, before allowance for credit loss, fee and loan in process	47,101		47,101		44,104
Total current period gross charge-offs
Originated current fiscal year, writeoff			0		0
Originated fiscal year before current fiscal year, writeoff			0		0
Originated two years before current fiscal year, writeoff			0		0
Originated three years before current fiscal year, writeoff			0		0
Originated four years before current fiscal year, writeoff			0		0
Originated more than five years before current fiscal year, writeoff			2		0
Revolving loans, writeoff			0		0
Total	2	0	2	0	0
Consumer | Other consumer
Total loans
Originated current fiscal year	493		493		804
Originated fiscal year before current fiscal year	460		460		211
Originated two years before current fiscal year	205		205		204
Originated three years before current fiscal year	124		124		127
Originated four years before current fiscal year	250		250		224
Originated more than five years before current fiscal year	1,115		1,115		990
Revolving loans	131		131		125
Financing receivable, before allowance for credit loss, fee and loan in process	2,778		2,778		2,685
Total current period gross charge-offs
Originated current fiscal year, writeoff			0		0
Originated fiscal year before current fiscal year, writeoff			0		0
Originated two years before current fiscal year, writeoff			0		0
Originated three years before current fiscal year, writeoff			0		0
Originated four years before current fiscal year, writeoff			0		0
Originated more than five years before current fiscal year, writeoff			5		0
Revolving loans, writeoff			0		0
Total	5	$ 0	5	$ 0	0
Pass | Commercial | Multi-family mortgage
Total loans
Originated current fiscal year	94,993		94,993		26,683
Originated fiscal year before current fiscal year	26,561		26,561		596,321
Originated two years before current fiscal year	612,266		612,266		949,690
Originated three years before current fiscal year	940,459		940,459		219,850
Originated four years before current fiscal year	220,974		220,974		201,611
Originated more than five years before current fiscal year	765,860		765,860		607,332
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	2,661,113		2,661,113		2,601,487
Pass | Commercial | Nonresidential mortgage
Total loans
Originated current fiscal year	49,943		49,943		87,380
Originated fiscal year before current fiscal year	82,077		82,077		105,768
Originated two years before current fiscal year	104,404		104,404		199,829
Originated three years before current fiscal year	196,849		196,849		90,312
Originated four years before current fiscal year	109,010		109,010		44,598
Originated more than five years before current fiscal year	378,121		378,121		389,680
Revolving loans	0		0		30
Financing receivable, before allowance for credit loss, fee and loan in process	920,404		920,404		917,597
Pass | Commercial | Commercial business
Total loans
Originated current fiscal year	5,373		5,373		12,152
Originated fiscal year before current fiscal year	11,313		11,313		8,273
Originated two years before current fiscal year	6,698		6,698		27,615
Originated three years before current fiscal year	22,233		22,233		18,242
Originated four years before current fiscal year	15,709		15,709		4,337
Originated more than five years before current fiscal year	10,222		10,222		7,863
Revolving loans	60,657		60,657		56,592
Financing receivable, before allowance for credit loss, fee and loan in process	132,205		132,205		135,074
Pass | Commercial | Construction
Total loans
Originated current fiscal year	17,486		17,486		51,261
Originated fiscal year before current fiscal year	73,073		73,073		45,180
Originated two years before current fiscal year	8,440		8,440		14,284
Originated three years before current fiscal year	10,360		10,360		62,584
Originated four years before current fiscal year	30,574		30,574		2,602
Originated more than five years before current fiscal year	6,042		6,042		3,647
Revolving loans	5,735		5,735		5,735
Financing receivable, before allowance for credit loss, fee and loan in process	151,710		151,710		185,293
Pass | Residential
Total loans
Originated current fiscal year	86,804		86,804		185,034
Originated fiscal year before current fiscal year	169,908		169,908		184,737
Originated two years before current fiscal year	181,358		181,358		431,346
Originated three years before current fiscal year	420,989		420,989		458,696
Originated four years before current fiscal year	445,872		445,872		77,442
Originated more than five years before current fiscal year	448,332		448,332		406,677
Revolving loans	75		75		291
Financing receivable, before allowance for credit loss, fee and loan in process	1,753,338		1,753,338		1,744,223
Pass | Consumer | Home equity loans
Total loans
Originated current fiscal year	961		961		1,919
Originated fiscal year before current fiscal year	1,866		1,866		5,698
Originated two years before current fiscal year	4,870		4,870		2,173
Originated three years before current fiscal year	1,918		1,918		347
Originated four years before current fiscal year	323		323		1,019
Originated more than five years before current fiscal year	8,126		8,126		8,086
Revolving loans	28,568		28,568		24,535
Financing receivable, before allowance for credit loss, fee and loan in process	46,632		46,632		43,777
Pass | Consumer | Other consumer
Total loans
Originated current fiscal year	493		493		804
Originated fiscal year before current fiscal year	460		460		211
Originated two years before current fiscal year	205		205		204
Originated three years before current fiscal year	124		124		127
Originated four years before current fiscal year	250		250		224
Originated more than five years before current fiscal year	1,115		1,115		990
Revolving loans	35		35		39
Financing receivable, before allowance for credit loss, fee and loan in process	2,682		2,682		2,599
Special Mention | Commercial | Multi-family mortgage
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	5,676		5,676		6,475
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	5,676		5,676		6,475
Special Mention | Commercial | Nonresidential mortgage
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		447
Originated four years before current fiscal year	955		955		0
Originated more than five years before current fiscal year	16,925		16,925		14,714
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	17,880		17,880		15,161
Special Mention | Commercial | Commercial business
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		1,559
Originated three years before current fiscal year	1,228		1,228		437
Originated four years before current fiscal year	138		138		0
Originated more than five years before current fiscal year	167		167		1,754
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	1,533		1,533		3,750
Special Mention | Commercial | Construction
Total loans
Originated current fiscal year	0		0		3,450
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		20,494
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	0		0		23,944
Special Mention | Residential
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	311		311		1,453
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	311		311		1,453
Special Mention | Consumer | Home equity loans
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	98		98		93
Financing receivable, before allowance for credit loss, fee and loan in process	98		98		93
Special Mention | Consumer | Other consumer
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	0		0		0
Substandard | Commercial | Multi-family mortgage
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		9,570
Originated four years before current fiscal year	9,456		9,456		0
Originated more than five years before current fiscal year	46,378		46,378		28,319
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	55,834		55,834		37,889
Substandard | Commercial | Nonresidential mortgage
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		867
Originated four years before current fiscal year	862		862		0
Originated more than five years before current fiscal year	11,048		11,048		14,450
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	11,910		11,910		15,317
Substandard | Commercial | Commercial business
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	96		96		1,767
Originated more than five years before current fiscal year	1,789		1,789		2,003
Revolving loans	117		117		153
Financing receivable, before allowance for credit loss, fee and loan in process	2,002		2,002		3,923
Substandard | Commercial | Construction
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	4,500		4,500		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	20,494		20,494		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	24,994		24,994		0
Substandard | Residential
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		509
Originated two years before current fiscal year	493		493		796
Originated three years before current fiscal year	781		781		0
Originated four years before current fiscal year	193		193		0
Originated more than five years before current fiscal year	10,044		10,044		9,070
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	11,511		11,511		10,375
Substandard | Consumer | Home equity loans
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	87		87		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	207		207		234
Revolving loans	77		77		0
Financing receivable, before allowance for credit loss, fee and loan in process	371		371		234
Substandard | Consumer | Other consumer
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	0		0		0
Doubtful | Commercial | Multi-family mortgage
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	0		0		0
Doubtful | Commercial | Nonresidential mortgage
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	0		0		0
Doubtful | Commercial | Commercial business
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	0		0		0
Doubtful | Commercial | Construction
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	0		0		0
Doubtful | Residential
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	0		0		0
Doubtful | Consumer | Home equity loans
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	0		0		0
Financing receivable, before allowance for credit loss, fee and loan in process	0		0		0
Doubtful | Consumer | Other consumer
Total loans
Originated current fiscal year	0		0		0
Originated fiscal year before current fiscal year	0		0		0
Originated two years before current fiscal year	0		0		0
Originated three years before current fiscal year	0		0		0
Originated four years before current fiscal year	0		0		0
Originated more than five years before current fiscal year	0		0		0
Revolving loans	96		96		86
Financing receivable, before allowance for credit loss, fee and loan in process	$ 96		$ 96		$ 86

X

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