LOANS - Troubled Debt Restructurings (Details) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2022 USD ($) loan	Jun. 30, 2021 loan	Jun. 30, 2022 USD ($) loan	Jun. 30, 2021 loan	Sep. 30, 2021 USD ($)
LOANS
Recorded investment in TDRs	$ 1.3		$ 1.3		$ 1.6
Specific reserves allocated to troubled debt restructurings	0.0		0.0		0.0
Commitments to lend additional funds in troubled debt restructurings	$ 0.0		$ 0.0		$ 0.0
TDR's with subsequent payment default \| loan	0	0	0	0
Threshold period for payment default			90 days
Number of newly added TDRs \| loan	0	0	0	0

Newly added financing receivables that have been modified by troubled debt restructurings during the period.

No definition available.

Name:	hovb_FinancingReceivableTroubledDebtRestructuringNewNumberOfContracts
Namespace Prefix:	hovb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of specific reserve allocated to financing receivable modified as troubled debt restructuring.

+ References

No definition available.

+ Details

Name:	hovb_FinancingReceivableTroubledDebtRestructuringSpecificReservesAllocated
Namespace Prefix:	hovb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Threshold period for a loan to be considered in payment default, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	hovb_ThresholdPeriodForPaymentDefault
Namespace Prefix:	hovb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554

+ Details

Name:	us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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