XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.20.2

Basis of Presentation (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) segment | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) | Mar. 31, 2020 USD ($) | Jan. 01, 2020 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Number of customers accounting for more than 10 percent of revenue for HBC or the Company |  |  | 0 |  |  |  |  |  |
Number of operating segments | segment |  |  | 2 |  |  |  |  |  |
Allowance for credit losses on debt securities | $ 55,000 |  | $ 55,000 |  |  |  | $ 58,000 |  |
Loans, net of deferred fees | 2,696,024,000 |  | 2,696,024,000 |  | $ 2,534,163,000 |  |  |  |
Allowance for credit losses on loans | 45,444,000 | $ 26,631,000 | 45,444,000 | $ 26,631,000 | 23,285,000 | $ 44,703,000 | 31,855,000 | $ 27,318,000 | $ 27,848,000
Allowance for credit losses on off-balance sheet credit exposures |  |  |  |  |  |  | 679,000 |  |
Retained earnings | 87,654,000 |  | 87,654,000 |  | 96,741,000 |  |  |  |
Income tax expense | 4,274,000 | $ 4,623,000 | 5,142,000 | $ 9,130,000 |  |  |  |  |
Debt Securities, Held-to-maturity, Credit Loss reduction |  |  | (3,000) |  |  |  |  |  |
Off-Balance Sheet, Credit Loss, Liability, Credit Loss reduction |  |  | (522,000) |  |  |  |  |  |
ASU 2016-03 - Topic 326 |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | 8,570,000 |  |  |  |
ASU 2016-03 - Topic 326 | Restatement Adjustment |  |  |  |  |  |  |  |  |
Allowance for credit losses on debt securities |  |  |  |  | 58,000 |  |  |  |
Allowance for credit losses on loans |  |  |  |  | 8,570,000 |  |  |  |
Allowance for credit losses on off-balance sheet credit exposures |  |  |  |  | (207,000) |  |  |  |
Retained earnings |  |  |  |  | (6,100,000) |  |  |  |
Income tax expense |  |  |  |  | 2,400,000 |  |  |  |
ASU 2016-03 - Topic 326 | Previously Reported |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | 23,285,000 |  |  |  |
Allowance for credit losses on off-balance sheet credit exposures |  |  |  |  | 886,000 |  |  |  |
Commercial |  |  |  |  |  |  |  |  |
Loans, net of deferred fees | 878,393,000 |  | 878,393,000 |  |  |  | 6,790,000 |  |
Allowance for credit losses on loans | 13,179,000 |  | 13,179,000 |  | 10,453,000 | 12,801,000 | 6,790,000 |  |
Commercial | ASU 2016-03 - Topic 326 |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | (3,663,000) |  |  |  |
Commercial | ASU 2016-03 - Topic 326 | Restatement Adjustment |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | (3,663,000) |  |  |  |
Commercial | ASU 2016-03 - Topic 326 | Previously Reported |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 10,453,000 |  |  |  |
CRE - owner occupied |  |  |  |  |  |  |  |  |
Loans, net of deferred fees | 553,463,000 |  | 553,463,000 |  |  |  | 6,994,000 |  |
Allowance for credit losses on loans | 8,547,000 |  | 8,547,000 |  | 3,825,000 | 7,737,000 | 6,994,000 |  |
CRE - owner occupied | ASU 2016-03 - Topic 326 |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | 3,169,000 |  |  |  |
CRE - owner occupied | ASU 2016-03 - Topic 326 | Restatement Adjustment |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 3,169,000 |  |  |  |
CRE - owner occupied | ASU 2016-03 - Topic 326 | Previously Reported |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 3,825,000 |  |  |  |
CRE - non-owner occupied |  |  |  |  |  |  |  |  |
Loans, net of deferred fees | 725,776,000 |  | 725,776,000 |  | 767,821,000 |  | 11,672,000 |  |
Allowance for credit losses on loans | 15,449,000 |  | 15,449,000 |  | 3,760,000 | 15,645,000 | 11,672,000 |  |
CRE - non-owner occupied | ASU 2016-03 - Topic 326 |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | 7,912,000 |  |  |  |
CRE - non-owner occupied | ASU 2016-03 - Topic 326 | Restatement Adjustment |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 7,912,000 |  |  |  |
CRE - non-owner occupied | ASU 2016-03 - Topic 326 | Previously Reported |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 3,760,000 |  |  |  |
Land and construction |  |  |  |  |  |  |  |  |
Loans, net of deferred fees | 138,284,000 |  | 138,284,000 |  |  |  | 1,458,000 |  |
Allowance for credit losses on loans | 2,552,000 |  | 2,552,000 |  | 2,621,000 | 2,603,000 | 1,458,000 |  |
Land and construction | ASU 2016-03 - Topic 326 |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | (1,163,000) |  |  |  |
Land and construction | ASU 2016-03 - Topic 326 | Restatement Adjustment |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | (1,163,000) |  |  |  |
Land and construction | ASU 2016-03 - Topic 326 | Previously Reported |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 2,621,000 |  |  |  |
Home equity |  |  |  |  |  |  |  |  |
Loans, net of deferred fees | 112,679,000 |  | 112,679,000 |  |  |  | 1,321,000 |  |
Allowance for credit losses on loans | 1,851,000 |  | 1,851,000 |  | 2,244,000 | 1,746,000 | 1,321,000 |  |
Home equity | ASU 2016-03 - Topic 326 |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | (923,000) |  |  |  |
Home equity | ASU 2016-03 - Topic 326 | Restatement Adjustment |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | (923,000) |  |  |  |
Home equity | ASU 2016-03 - Topic 326 | Previously Reported |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 2,244,000 |  |  |  |
Multi-family |  |  |  |  |  |  |  |  |
Loans, net of deferred fees | 169,637,000 |  | 169,637,000 |  |  |  | 1,253,000 |  |
Allowance for credit losses on loans | 1,828,000 |  | 1,828,000 |  | 57,000 | 1,622,000 | 1,253,000 |  |
Multi-family | ASU 2016-03 - Topic 326 |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | 1,196,000 |  |  |  |
Multi-family | ASU 2016-03 - Topic 326 | Restatement Adjustment |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 1,196,000 |  |  |  |
Multi-family | ASU 2016-03 - Topic 326 | Previously Reported |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 57,000 |  |  |  |
Residential mortgages |  |  |  |  |  |  |  |  |
Loans, net of deferred fees | 95,033,000 |  | 95,033,000 |  |  |  | 678,000 |  |
Allowance for credit losses on loans | 825,000 |  | 825,000 |  | 243,000 | 708,000 | 678,000 |  |
Residential mortgages | ASU 2016-03 - Topic 326 |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | 435,000 |  |  |  |
Residential mortgages | ASU 2016-03 - Topic 326 | Restatement Adjustment |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 435,000 |  |  |  |
Residential mortgages | ASU 2016-03 - Topic 326 | Previously Reported |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 243,000 |  |  |  |
Consumer and other |  |  |  |  |  |  |  |  |
Loans, net of deferred fees | 22,759,000 |  | 22,759,000 |  |  |  | 1,689,000 |  |
Allowance for credit losses on loans | $ 1,213,000 |  | $ 1,213,000 |  | 82,000 | $ 1,841,000 | $ 1,689,000 |  |
Consumer and other | ASU 2016-03 - Topic 326 |  |  |  |  |  |  |  |  |
Allowance for credit losses on loans |  |  |  |  | 1,607,000 |  |  |  |
Consumer and other | ASU 2016-03 - Topic 326 | Restatement Adjustment |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | 1,607,000 |  |  |  |
Consumer and other | ASU 2016-03 - Topic 326 | Previously Reported |  |  |  |  |  |  |  |  |
Loans, net of deferred fees |  |  |  |  | $ 82,000 |  |  |  |

X
- Definition Represents the number of customers accounting for more than 10 percent of revenue. + References No definition available. + Details
Name: | htbk_ConcentrationRiskNumberOfCustomersAccountingForMoreThan10PercentOfRevenue
Namespace Prefix: | htbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense (reversal of expense) for expected credit loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_DebtSecuritiesHeldToMaturityCreditLossExpenseReversal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120385591&loc=d3e38679-109324 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(9)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599 + Details
Name: | us-gaap_NumberOfOperatingSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121611286&loc=d3e11927-110247 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82919202-210446 + Details
Name: | us-gaap_OffBalanceSheetCreditLossLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. + 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(30)(a)(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 65 -Paragraph 15 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(a)(4)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (g)(2)(i) -URI http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641 + Details
Name: | us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201613Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RestatementAxis=srt_RestatementAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RestatementAxis=srt_ScenarioPreviouslyReportedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=htbk_CommercialFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=htbk_CommercialAndResidentialWithOwnerOccupiedFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=htbk_CommercialAndResidentialWithNonOwnerOccupiedFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=htbk_LandAndConstructionFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=htbk_MultiFamilyResidentialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=htbk_ConsumerLoansAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |