OTHER COMMITMENTS AND CONTINGENCIES (Tables)

6 Months Ended

Jun. 30, 2023

Schedule of financial instruments with off-balance sheet credit risk

	June 30,		December 31,
	2023		2022
	(in thousands)
Commitments to grant residential real estate loans-HarborOne Mortgage	$	67,347	$	57,916
Commitments to grant other loans		84,676		43,700
Unadvanced funds on home equity lines of credit		256,957		251,759
Unadvanced funds on revolving lines of credit		314,496		351,382
Unadvanced funds on construction loans		287,523		262,945

Schedule of activity in the ACL on unfunded commitments

			Second Mortgages		Residential
	One- to Four-		and Equity		Real Estate		Commercial		Commercial		Commercial
	Family		Lines of Credit		Construction		Real Estate		Construction		and Industrial		Consumer		Total
	(in thousands)
Balance at March 31, 2023	$	11,508	$	967	$	755	$	20,942	$	5,057	$	7,484	$	281	$	46,994
Charge-offs		—		—		—		(2,918)		—		(28)		(42)		(2,988)
Recoveries		1		36		—		1		—		275		4		317
Provision		676		9		(125)		2,574		316		19		29		3,498
Balance at June 30, 2023	$	12,185	$	1,012	$	630	$	20,599	$	5,373	$	7,750	$	272	$	47,821

			Second Mortgages		Residential
	One- to Four-		and Equity		Real Estate		Commercial		Commercial		Commercial
	Family		Lines of Credit		Construction		Real Estate		Construction		and Industrial		Consumer		Total
	(in thousands)
Balance at December 31, 2022	$	11,532	$	924	$	280	$	20,357	$	4,645	$	7,236	$	262	$	45,236
Charge-offs		—		—		—		(2,918)		—		(35)		(49)		(3,002)
Recoveries		2		43		—		2		—		275		20		342
Provision		651		45		350		3,158		728		274		39		5,245
Balance at June 30, 2023	$	12,185	$	1,012	$	630	$	20,599	$	5,373	$	7,750	$	272	$	47,821

			Second Mortgages		Residential
	One- to Four-		and Equity		Real Estate		Commercial		Commercial		Commercial
	Family		Lines of Credit		Construction		Real Estate		Construction		and Industrial		Consumer		Total
	(in thousands)
Balance at March 31, 2022	$	8,884	$	833	$	314	$	20,131	$	4,210	$	6,949	$	444	$	41,765
Charge-offs		—		—		—		—		—		—		(11)		(11)
Recoveries		—		81		—		6		—		406		23		516
Provision		1,198		(65)		13		294		160		(181)		(129)		1,290
Balance at June 30, 2022	$	10,082	$	849	$	327	$	20,431	$	4,370	$	7,174	$	327	$	43,560

			Second Mortgages		Residential
	One- to Four-		and Equity		Real Estate		Commercial		Commercial		Commercial
	Family		Lines of Credit		Construction		Real Estate		Construction		and Industrial		Consumer		Unallocated		Total
	(in thousands)
Balance at December 31, 2021	$	3,631	$	420	$	69	$	33,242	$	2,010	$	4,638	$	367	$	1,000	$	45,377
Adoption of Topic 326		5,198		391		185		(10,194)		1,698		2,288		123		(1,000)		(1,311)
Charge-offs		—		—		—		(2,786)		—		(40)		(31)		—		(2,857)
Recoveries		—		93		—		6		—		473		60		—		632
Provision		1,253		(55)		73		163		662		(185)		(192)		—		1,719
Balance at June 30, 2022	$	10,082	$	849	$	327	$	20,431	$	4,370	$	7,174	$	327	$	—	$	43,560

Unfunded Commitment

Schedule of activity in the ACL on unfunded commitments

	Residential		Commercial		Commercial		Commercial
	Real Estate		Real Estate		Construction		and Industrial		Consumer		Total
	(in thousands)
Balance at March 31, 2023	$	262	$	548	$	3,277	$	940	$	19	$	5,046
Provision		10		(58)		(97)		(70)		—		(215)
Balance at June 30, 2023	$	272	$	490	$	3,180	$	870	$	19	$	4,831
Balance at March 31, 2022	$	339	$	538	$	2,345	$	604	$	14	$	3,840
Provision		(2)		(56)		1,293		20		1		1,256
Balance at June 30, 2022	$	337	$	482	$	3,638	$	624	$	15	$	5,096

	Residential		Commercial		Commercial		Commercial
	Real Estate		Real Estate		Construction		and Industrial		Consumer		Total
	(in thousands)
Balance at December 31, 2022	$	336	$	628	$	3,079	$	870	$	14	$	4,927
Provision		(64)		(138)		101		—		5		(96)
Balance at June 30, 2023	$	272	$	490	$	3,180	$	870	$	19	$	4,831
Balance at December 31, 2021	$	—	$	—	$	—	$	—	$	—	$	—
Adoption of Topic 326		318		380		2,561		658		14		3,931
Provision		19		102		1,077		(34)		1		1,165
Balance at June 30, 2022	$	337	$	482	$	3,638	$	624	$	15	$	5,096