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Acquisition Activity - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Weighted average remaining contractual life	5 years 6 months

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- Definition

Weighted average remaining contractual life of loan portfolio acquired with deteriorated credit quality.

+ References

No definition available.

+ Details

Name:	hbcp_WeightedAverageRemainingContractualLifeOfLoanPortfolioAcquiredWithDeterioratedCreditQuality
Namespace Prefix:	hbcp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_BusinessCombinationsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration