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Related Party Transactions - Additional Information (Detail) - Management $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 USD ($) SecurityLoan | Dec. 31, 2018 USD ($)
Related Party Transaction [Line Items] |  |
Number of related party loans not treated as impaired | SecurityLoan | 0 |
Maximum limit of percent of shareholders equity related party loans to identified as impaired (percent) | 5.00% |
Related party deposits | $ | $ 13,887 | $ 15,077

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- Definition Related party loans exceeding specified percentage of shareholders equity. + References No definition available. + Details
Name: | hbcp_RelatedPartyLoansExceedingSpecifiedPercentageOfShareholdersEquity
Namespace Prefix: | hbcp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Related party loans not treated as impaired. + References No definition available. + Details
Name: | hbcp_RelatedPartyLoansNotTreatedAsImpaired
Namespace Prefix: | hbcp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of deposits held by the entity for a related party (entity, shareholder, employee). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_RelatedPartyDepositLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_ManagementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |