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DEPOSITS - Interest Bearing Deposits - Narrative (Detail) - USD ($) | Mar. 31, 2025 | Dec. 31, 2024
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Deposits [Abstract] |  |
Reciprocal transaction deposits, Interest bearing demand deposits | $ 264,400,000 | $ 229,400,000
Time deposits, brokered | 0 | 0
Time deposits, at or above FDIC insurance limit | 209,200,000 | 202,200,000
Time deposits in denominations of $100,000 or more | $ 460,800,000 | $ 455,200,000

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

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- Definition Time Deposits, Brokered + References No definition available. + Details
Name: | hbt_TimeDepositsBrokered
Namespace Prefix: | hbt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of $100,000 or more. + References No definition available. + Details
Name: | us-gaap_TimeDeposits100000OrMore
Namespace Prefix: | us-gaap_
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 that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478353/942-405-50-1 + Details
Name: | us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant