LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Gross Chargeoffs by Origination Year (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Term Loans by Origination Year
Gross write-offs, 2023	$ 141		$ 276
Gross write-offs, 2022	11		88
Gross write-offs 2021	0		0
Gross write-offs, 2020	0		9
Gross write-offs, 2019	0		1
Gross write-offs, prior	8		33
Revolving Loans	252		326
Revolving Loans Converted to Term	0		0
Total	412	$ 222	733	$ 515
Commercial and industrial
Term Loans by Origination Year
Gross write-offs, 2023	0		0
Gross write-offs, 2022	0		0
Gross write-offs 2021	0		0
Gross write-offs, 2020	0		0
Gross write-offs, 2019	0		0
Gross write-offs, prior	0		0
Revolving Loans	15		15
Revolving Loans Converted to Term	0		0
Total	15	17	15	22
Commercial real estate - owner occupied
Term Loans by Origination Year
Gross write-offs, 2023	0		0
Gross write-offs, 2022	2		5
Gross write-offs 2021	0		0
Gross write-offs, 2020	0		0
Gross write-offs, 2019	0		0
Gross write-offs, prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term	0		0
Total	2	0	5	0
Commercial real estate - non-owner occupied
Term Loans by Origination Year
Gross write-offs, 2023	0		0
Gross write-offs, 2022	0		0
Gross write-offs 2021	0		0
Gross write-offs, 2020	0		0
Gross write-offs, 2019	0		0
Gross write-offs, prior	0		0
Revolving Loans	171		171
Revolving Loans Converted to Term	0		0
Total	171	0	171	0
Construction and land development
Term Loans by Origination Year
Gross write-offs, 2023	0		0
Gross write-offs, 2022	0		0
Gross write-offs 2021	0		0
Gross write-offs, 2020	0		0
Gross write-offs, 2019	0		0
Gross write-offs, prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term	0		0
Total	0	0	0	0
Multi-family
Term Loans by Origination Year
Gross write-offs, 2023	0		0
Gross write-offs, 2022	0		0
Gross write-offs 2021	0		0
Gross write-offs, 2020	0		0
Gross write-offs, 2019	0		0
Gross write-offs, prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term	0		0
Total	0	0	0	0
One-to-four family residential
Term Loans by Origination Year
Gross write-offs, 2023	0		0
Gross write-offs, 2022	0		0
Gross write-offs 2021	0		0
Gross write-offs, 2020	0		0
Gross write-offs, 2019	0		1
Gross write-offs, prior	8		33
Revolving Loans	0		0
Revolving Loans Converted to Term	0		0
Total	8	18	34	67
Agricultural and farmland
Term Loans by Origination Year
Gross write-offs, 2023	0		0
Gross write-offs, 2022	0		0
Gross write-offs 2021	0		0
Gross write-offs, 2020	0		0
Gross write-offs, 2019	0		0
Gross write-offs, prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term	0		0
Total	0	0	0	0
Municipal, consumer, and other
Term Loans by Origination Year
Gross write-offs, 2023	141		276
Gross write-offs, 2022	9		83
Gross write-offs 2021	0		0
Gross write-offs, 2020	0		9
Gross write-offs, 2019	0		0
Gross write-offs, prior	0		0
Revolving Loans	66		140
Revolving Loans Converted to Term	0		0
Total	$ 216	$ 187	$ 508	$ 426

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of revolving financing receivable converted to term loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6A

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable that can be withdrawn, repaid, and redrawn.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated four years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated three years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated two years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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