LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses Activity (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Activity in the allowance for loan losses
Balance	$ 43,560	$ 51,273	$ 45,377	$ 55,395
Charge-offs	(253)	(1,719)	(3,111)	(2,003)
Recoveries	1,052	61	1,685	417
Provision	262	(1,627)	1,981	(5,821)
Balance	44,621	47,988	44,621	47,988
ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses
Balance	(1,311)		(1,311)
Residential
Activity in the allowance for loan losses
Balance			4,120
Residential \| 1-4 family
Activity in the allowance for loan losses
Balance	10,082	4,708	3,631	6,168
Recoveries	2	1	2	144
Provision	834	(1,667)	2,087	(3,270)
Balance	10,918	3,042	10,918	3,042
Residential \| 1-4 family \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses
Balance	5,198		5,198
Residential \| Second mortgages and equity lines of credit
Activity in the allowance for loan losses
Balance	849	603	420	1,054
Recoveries	15	7	108	83
Provision	(16)	(270)	(71)	(797)
Balance	848	340	848	340
Residential \| Second mortgages and equity lines of credit \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses
Balance	391		391
Residential \| Residential real estate construction
Activity in the allowance for loan losses
Balance	327	123	69	197
Provision	(33)	(72)	40	(146)
Balance	294	51	294	51
Residential \| Residential real estate construction \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses
Balance	185		185
Commercial \| Commercial real estate
Activity in the allowance for loan losses
Balance	20,431	32,991	33,242	34,765
Charge-offs	(24)	(381)	(2,810)	(393)
Recoveries	7	1	13	5
Provision	741	2,059	904	293
Balance	21,155	34,670	21,155	34,670
Commercial \| Commercial real estate \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses
Balance	(10,194)		(10,194)
Commercial \| Commercial construction
Activity in the allowance for loan losses
Balance	4,370	1,937	2,010	1,955
Provision	99	615	761	597
Balance	4,469	2,552	4,469	2,552
Commercial \| Commercial construction \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses
Balance	1,698		1,698
Commercial \| Commercial and industrial
Activity in the allowance for loan losses
Balance	7,174	8,059	4,638	5,311
Charge-offs	(205)	(1,277)	(246)	(1,463)
Recoveries	1,021	18	1,495	36
Provision	(1,300)	(815)	(1,485)	2,101
Balance	6,690	5,985	6,690	5,985
Commercial \| Commercial and industrial \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses
Balance	2,288		2,288
Consumer loans
Activity in the allowance for loan losses
Balance	327	853	367	2,475
Charge-offs	(24)	(61)	(55)	(147)
Recoveries	7	34	67	149
Provision	(63)	(478)	(255)	(2,129)
Balance	247	348	247	348
Consumer loans \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses
Balance	123		123
Unallocated
Activity in the allowance for loan losses
Balance		1,999	1,000	3,470
Provision		(999)		(2,470)
Balance		$ 1,000		$ 1,000
Unallocated \| ASU 2016-13 \| Cumulative Effect, Period of Adoption, Adjustment
Activity in the allowance for loan losses
Balance	$ (1,000)		$ (1,000)

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

Name:	us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_AllowanceForLoanAndLeaseLossesRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

Name:	us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI http://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of credit loss expense (reversal of expense) for financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(11))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

Name:	us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201613Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hone_OneToFourFamilyRealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hone_SecondMortgageLoanAndHomeEquityLineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hone_ResidentialConstructionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hone_CommercialConstructionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hone_CommercialAndIndustrialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_UnallocatedFinancingReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: