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JUNIOR SUBORDINATED DEBENTURES ISSUED TO CAPITAL TRUSTS - Narrative (Details) - period	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
JUNIOR SUBORDINATED DEBENTURES ISSUED TO CAPITAL TRUSTS
Trust preferred securities qualified as Tier 1 capital	100.00%	100.00%
Junior Subordinated Debentures Issued
JUNIOR SUBORDINATED DEBENTURES ISSUED TO CAPITAL TRUSTS
Maximum deferred interest period quarters	20
Period shorten the maturity date from the event	90 days

X

- Definition

The number quarters the interest payment can be deferred.

+ References

No definition available.

+ Details

Name:	hbt_MaximumDeferredPeriodOfInterestQuarters
Namespace Prefix:	hbt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of trust preferred securities qualified as Tier 1 capital.

+ References

No definition available.

+ Details

Name:	hbt_PercentageOfTrustPreferredSecuritiesQualifiedAsTier1Capital
Namespace Prefix:	hbt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The period within the time an event occurs, per the agreement, in which the maturity date may be shortened.

+ References

No definition available.

+ Details

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Namespace Prefix:	hbt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

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

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_JuniorSubordinatedDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: