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Other Borrowings - Additional Information (Detail) - Other Borrowings - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Other Borrowings [Line Items] |  |
Note payable | $ 5,539,000 | $ 5,539,000
Note payable interest rate | 3.83% | 3.83%
Note payable leverage loan term | 20 years | 20 years
Note payable leverage loan payments year | 7 years | 7 years

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- Definition Debt instrument interest payment period. + References No definition available. + Details
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Period Type: | duration

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- Definition Maturity period of term loan facility under subtranche. + References No definition available. + Details
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Namespace Prefix: | hbcp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Other borrowings [Line Items]. + References No definition available. + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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