FAIR VALUE OF FINANCIAL INSTRUMENTS - Recurring basis (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	$ 843,524	$ 942,168
Equity securities	3,029	3,443
Fair value	10,147	7,994
Transfer of assets from level 1 to level 2	0	0
Transfer of assets from level 2 to level 1	0	0
Transfer of assets in to level 3	0	0
Transfer of assets out of level 3	0	0
Transfer of liabilities from level 1 to level 2	0	0
Transfer of liabilities from level 2 to level 1	0	0
Transfer of liabilities in to level 3	0	0
Transfer of liabilities out of level 3	0	0
U.S. Treasury
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	154,515	108,976
U.S. government agency
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	55,157	128,105
Municipal securities
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	243,829	297,077
Mortgage-backed: Agency residential
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	195,441	179,466
Mortgage-backed: Agency commercial
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	132,888	164,061
Corporate
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	61,694	64,483
Recurring
FAIR VALUE OF FINANCIAL INSTRUMENTS
Equity securities	3,029	3,443
Fair value	10,147	7,994
Derivative financial assets fair value	7,610	8,697
Derivative financial liabilities fair value	6,981	9,377
Recurring \| U.S. Treasury
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	154,515	108,976
Recurring \| U.S. government agency
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	55,157	128,105
Recurring \| Municipal securities
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	243,829	297,077
Recurring \| Mortgage-backed: Agency residential
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	195,441	179,466
Recurring \| Mortgage-backed: Agency commercial
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	132,888	164,061
Recurring \| Corporate
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	61,694	64,483
Recurring \| Level 1
FAIR VALUE OF FINANCIAL INSTRUMENTS
Equity securities	3,029	3,443
Recurring \| Level 1 \| U.S. Treasury
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	154,515	108,976
Recurring \| Level 2
FAIR VALUE OF FINANCIAL INSTRUMENTS
Derivative financial assets fair value	7,610	8,697
Derivative financial liabilities fair value	6,981	9,377
Recurring \| Level 2 \| U.S. government agency
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	55,157	128,105
Recurring \| Level 2 \| Municipal securities
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	243,829	297,077
Recurring \| Level 2 \| Mortgage-backed: Agency residential
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	195,441	179,466
Recurring \| Level 2 \| Mortgage-backed: Agency commercial
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	132,888	164,061
Recurring \| Level 2 \| Corporate
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	61,694	64,483
Recurring \| Level 3
FAIR VALUE OF FINANCIAL INSTRUMENTS
Fair value	$ 10,147	$ 7,994

Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

No definition available.

Name:	hbt_FairValueAssetsLevel1ToLevel2TransfersAmount1
Namespace Prefix:	hbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

+ References

No definition available.

+ Details

Name:	hbt_FairValueAssetsLevel2ToLevel1TransfersAmount1
Namespace Prefix:	hbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

+ References

No definition available.

+ Details

Name:	hbt_FairValueLiabilitiesLevel1ToLevel2TransfersAmount1
Namespace Prefix:	hbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

+ References

No definition available.

+ Details

Name:	hbt_FairValueLiabilitiesLevel2ToLevel1TransfersAmount1
Namespace Prefix:	hbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.

+ References

No definition available.

+ Details

Name:	hbt_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel31
Namespace Prefix:	hbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy.

+ References

No definition available.

+ Details

Name:	hbt_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel31
Namespace Prefix:	hbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into level 3 of the fair value hierarchy.

+ References

No definition available.

+ Details

Name:	hbt_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel31
Namespace Prefix:	hbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of transfers of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset) out of level 3 of the fair value hierarchy.

+ References

No definition available.

+ Details

Name:	hbt_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel31
Namespace Prefix:	hbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

+ Details

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

- Definition

Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 22
-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313

+ Details

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

- Definition

Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 22
-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

+ Details

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

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

+ Details

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

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: