Fair Value Measurements - Other Real Estate Owned and Repossessed Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Total Gains (Losses) \| Real Estate Mortgage - Residential
Fair Value Measurements
Gains (losses) on impaired loans	$ (88)
Total Gains (Losses) \| Installment and other consumer
Fair Value Measurements
Gains (losses) on impaired loans	(87)	$ (40)
Nonrecurring \| Fair value
Fair Value Measurements
Impaired loans	3,585	17,664
Other real estate and repossessed assets	1,744	8,795
Nonrecurring \| Fair value \| Commercial, Financial, and Agricultural \| Mortgage
Fair Value Measurements
Impaired loans	921
Nonrecurring \| Fair value \| Real Estate Construction - Residential \| Mortgage
Fair Value Measurements
Impaired loans	268
Nonrecurring \| Fair value \| Real Estate Mortgage - Residential
Fair Value Measurements
Impaired loans	27
Nonrecurring \| Fair value \| Real Estate Construction - Commercial \| Mortgage
Fair Value Measurements
Impaired loans	2,369	17,664
Nonrecurring \| Fair value \| Installment and other consumer
Fair Value Measurements
Impaired loans	0	0
Nonrecurring \| Total Gains (Losses)
Fair Value Measurements
Gains (losses) on impaired loans	(283)	(91)
Gains (losses) on other real estate and repossessed assets	(4,431)	233
Nonrecurring \| Total Gains (Losses) \| Commercial, Financial, and Agricultural \| Mortgage
Fair Value Measurements
Gains (losses) on impaired loans	(76)
Nonrecurring \| Total Gains (Losses) \| Real Estate Construction - Residential \| Mortgage
Fair Value Measurements
Gains (losses) on impaired loans	0
Nonrecurring \| Total Gains (Losses) \| Real Estate Construction - Commercial \| Mortgage
Fair Value Measurements
Gains (losses) on impaired loans	(32)	(51)
Nonrecurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair value
Fair Value Measurements
Impaired loans	0	0
Other real estate and repossessed assets	0	0
Nonrecurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair value \| Commercial, Financial, and Agricultural \| Mortgage
Fair Value Measurements
Impaired loans	0
Nonrecurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair value \| Real Estate Construction - Residential \| Mortgage
Fair Value Measurements
Impaired loans	0
Nonrecurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair value \| Real Estate Mortgage - Residential
Fair Value Measurements
Impaired loans	0
Nonrecurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair value \| Real Estate Construction - Commercial \| Mortgage
Fair Value Measurements
Impaired loans	0	0
Nonrecurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair value \| Installment and other consumer
Fair Value Measurements
Impaired loans	0	0
Nonrecurring \| Other Observable Inputs (Level 2) \| Fair value
Fair Value Measurements
Impaired loans	0	0
Other real estate and repossessed assets	0	0
Nonrecurring \| Other Observable Inputs (Level 2) \| Fair value \| Commercial, Financial, and Agricultural \| Mortgage
Fair Value Measurements
Impaired loans	0
Nonrecurring \| Other Observable Inputs (Level 2) \| Fair value \| Real Estate Construction - Residential \| Mortgage
Fair Value Measurements
Impaired loans	0
Nonrecurring \| Other Observable Inputs (Level 2) \| Fair value \| Real Estate Mortgage - Residential
Fair Value Measurements
Impaired loans	0
Nonrecurring \| Other Observable Inputs (Level 2) \| Fair value \| Real Estate Construction - Commercial \| Mortgage
Fair Value Measurements
Impaired loans	0	0
Nonrecurring \| Other Observable Inputs (Level 2) \| Fair value \| Installment and other consumer
Fair Value Measurements
Impaired loans	0	0
Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Fair value
Fair Value Measurements
Impaired loans	3,585	17,664
Other real estate and repossessed assets	1,744	8,795
Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Fair value \| Commercial, Financial, and Agricultural \| Mortgage
Fair Value Measurements
Impaired loans	921
Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Fair value \| Real Estate Construction - Residential \| Mortgage
Fair Value Measurements
Impaired loans	268
Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Fair value \| Real Estate Mortgage - Residential
Fair Value Measurements
Impaired loans	27
Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Fair value \| Real Estate Construction - Commercial \| Mortgage
Fair Value Measurements
Impaired loans	2,369	17,664
Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Fair value \| Installment and other consumer
Fair Value Measurements
Impaired loans	$ 0	$ 0

Represents the amount of gains (losses) arising due to the change in fair value of impaired loans.

No definition available.

Name:	hwbk_GainsLossesOnImpairedLoansChangeInFairValue
Namespace Prefix:	hwbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of gains (losses) arising due to the change in fair value of other real estate owned and repossessed assets.

+ References

No definition available.

+ Details

Name:	hwbk_GainsLossesOnOtherRealEstateAndRepossessedAssetsChangeInFairValue
Namespace Prefix:	hwbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the portion of impaired loans receivable that are valued at fair value by the entity.

+ References

No definition available.

+ Details

Name:	hwbk_ImpairedLoansFairValueDisclosure
Namespace Prefix:	hwbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the portion of other impaired loans receivable that are valued at fair value by the entity.

+ References

No definition available.

+ Details

Name:	hwbk_OtherRealEstateAndRepossessedAssetsFairValueDisclosure
Namespace Prefix:	hwbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-3

+ Details

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

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_ChangeDuringPeriodFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=hwbk_RealEstateMortgageResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=hwbk_InstallmentAndOtherConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=hwbk_CommercialFinancialAndAgriculturalPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_MortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=hwbk_ResidentialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: