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DEPOSITS - Interest bearing Deposits - Narrative (Detail) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
DEPOSITS |  |
Brokered deposits |  | $ 0.0
Reciprocal transaction deposits, Interest bearing demand deposits | $ 41.6 |
Reciprocal transaction deposits, Money market deposits | 11.7 | 1.7
Reciprocal transaction deposits, Time deposits | 38.8 | 1.6
Time deposits in denominations of $250,000 or more | 78.7 | 27.2
Time deposits in denominations of $100,000 or more | 236.8 | $ 92.6
Money Market Funds [Member] |  |
DEPOSITS |  |
Brokered deposits | 50.0 |
Bank Time Deposits [Member] |  |
DEPOSITS |  |
Brokered deposits | $ 1.0 |

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- Definition The amount of Reciprocal Transaction deposits made in Money market deposits. + References No definition available. + Details
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Namespace Prefix: | hbt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of Reciprocal Transaction deposits made in interest bearing demand deposits. + References No definition available. + Details
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Namespace Prefix: | hbt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more. + References No definition available. + Details
Name: | hbt_TimeDeposits250000OrMore
Namespace Prefix: | hbt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of Reciprocal Transaction deposits made in Time deposits. + References No definition available. + Details
Name: | hbt_TimeDepositsReciprocalTransactionDeposits
Namespace Prefix: | hbt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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Period Type: | instant

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- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of $100,000 or more. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher SEC -Name Industry Guide -Number 3 -Section V -Paragraph D-E + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |