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Recent Accounting Pronouncements - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of increase in assets and liabilities	1.00%

X

- Definition

Percentage of increase in assets and liabilities.

+ References

No definition available.

+ Details

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Namespace Prefix:	hbcp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

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

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: