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Fair Value Measurements and Disclosures - Summary of Financial Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Assets |  |
Repossessed assets | $ 454 | $ 2,893
Impaired loans | 4,682 | 4,763
Total | 5,136 | 7,656
Level 3 [Member] |  |
Assets |  |
Repossessed assets | 454 | 2,893
Impaired loans | 4,682 | 4,763
Total | $ 5,136 | $ 7,656

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- Definition Impaired loans fair value disclosure nonrecurring. + References No definition available. + Details
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Namespace Prefix: | hbcp_
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Balance Type: | debit
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- Definition Repossessed assets fair value disclosure nonrecurring. + References No definition available. + Details
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Namespace Prefix: | hbcp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Details
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Balance Type: |
Period Type: |