Loans and Allowance for Loan Losses - Average Recorded Investment and Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
With no related allowance recorded:
Average Recorded Investment	$ 15,712	$ 12,551	$ 15,679	$ 12,683
Interest Recognized For the Period Ended	0	17	0	34
With an allowance recorded:
Average Recorded Investment	3,340	23,916	3,349	23,927
Interest Recognized For the Period Ended	28	19	52	42
Total average recorded investment	19,052	36,467	19,028	36,610
Total interest income recognized For the Period Ended	28	36	52	76
Commercial, financial and agricultural
With no related allowance recorded:
Average Recorded Investment	0	1,826	0	1,834
Interest Recognized For the Period Ended	0	5	0	13
With an allowance recorded:
Average Recorded Investment	315	5,553	316	5,548
Interest Recognized For the Period Ended	3	7	5	13
Real estate construction − residential & Real estate mortgage − residential \| Construction
With no related allowance recorded:
Average Recorded Investment	0	1,266	0	1,391
Interest Recognized For the Period Ended	0	12	0	21
With an allowance recorded:
Average Recorded Investment	0	125	0	158
Interest Recognized For the Period Ended	0	0	0	0
Real estate construction − residential & Real estate mortgage − residential \| Mortgage
With an allowance recorded:
Average Recorded Investment	2,327	1,692	2,333	1,779
Interest Recognized For the Period Ended	9	4	16	11
Real estate construction − commercial & Real estate mortgage − commercial \| Construction
With an allowance recorded:
Average Recorded Investment	97	165	97	182
Interest Recognized For the Period Ended	16	0	30	0
Real estate construction − commercial & Real estate mortgage − commercial \| Mortgage
With no related allowance recorded:
Average Recorded Investment	15,712	9,459	15,679	9,458
Interest Recognized For the Period Ended	0	0	0	0
With an allowance recorded:
Average Recorded Investment	426	16,323	428	16,189
Interest Recognized For the Period Ended	0	8	1	15
Installment and other consumer
With an allowance recorded:
Average Recorded Investment	175	58	175	71
Interest Recognized For the Period Ended	$ 0	$ 0	$ 0	$ 3

Represents Impaired Financing Receivable With No Related Allowance Investment.

No definition available.

Name:	hwbk_ImpairedFinancingReceivableWithNoRelatedAllowanceInvestmentAbstract
Namespace Prefix:	hwbk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents Impaired Financing Receivable With Related Allowance Investment.

+ References

No definition available.

+ Details

Name:	hwbk_ImpairedFinancingReceivableWithRelatedAllowanceInvestmentAbstract
Namespace Prefix:	hwbk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=hwbk_CommercialFinancialAndAgriculturalPortfolioSegmentMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
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=us-gaap_CommercialRealEstatePortfolioSegmentMember
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: