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FAIR VALUE OF FINANCIAL INSTRUMENTS - Unobservable inputs used in nonrecurring measurements (Details) - Nonrecurring - Level 3 $ in Thousands	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Collateral-dependent impaired loans | Appraisal of collateral
FAIR VALUE OF FINANCIAL INSTRUMENTS
Fair Value	$ 32,767	$ 17,460
Alternative Investment, Measurement Input [Extensible List]	hbt:AppraisalAdjustmentsMember	hbt:AppraisalAdjustmentsMember
Bank premises held for sale | Appraisal
FAIR VALUE OF FINANCIAL INSTRUMENTS
Fair Value	$ 35	$ 235
Measurement input	0.07	0.07
Alternative Investment, Measurement Input [Extensible List]	hbt:AppraisalAdjustmentsMember	hbt:AppraisalAdjustmentsMember
Bank premises held for sale | Appraisal | Weighted average
FAIR VALUE OF FINANCIAL INSTRUMENTS
Measurement input	(0.07)	(0.07)
Foreclosed assets | Appraisal
FAIR VALUE OF FINANCIAL INSTRUMENTS
Fair Value	$ 3,080	$ 3,030
Measurement input	0.07	0.07
Alternative Investment, Measurement Input [Extensible List]	hbt:AppraisalAdjustmentsMember	hbt:AppraisalAdjustmentsMember
Foreclosed assets | Appraisal | Weighted average
FAIR VALUE OF FINANCIAL INSTRUMENTS
Measurement input	(0.07)	(0.07)

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+ References

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 31
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14210-108612

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- Definition

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+ References

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-Publisher FASB
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+ References

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