Loans and Allowance for Loan Losses (Details 5) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	$ 2,452	$ 1,713	$ 2,515	$ 1,962
With no related allowance recorded, Interest Recognized For The Period Ended	13	0	26	7
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	7,663	7,707	7,881	7,396
With an allowance recorded, Interest Recognized For The Period Ended	28	64	73	135
Total average recorded investment	10,115	9,420	10,396	9,358
Total interest income recognized For the Period Ended	41	64	99	142
Commercial, financial, and agricultural
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	1,153	464	1,302	519
With no related allowance recorded, Interest Recognized For The Period Ended	0	(1)	1	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	1,621	1,214	1,737	1,199
With an allowance recorded, Interest Recognized For The Period Ended	8	8	15	19
Residential Real Estate
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	933	852	900	912
With no related allowance recorded, Interest Recognized For The Period Ended	3	3	6	7
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	4,118	4,790	4,247	4,595
With an allowance recorded, Interest Recognized For The Period Ended	14	42	47	87
Residential Real Estate \| Construction
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	20	0	15	0
With an allowance recorded, Interest Recognized For The Period Ended	0	0	0	0
Real estate - commercial
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	116	395	237	500
With no related allowance recorded, Interest Recognized For The Period Ended	10	(2)	19	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	1,732	1,604	1,691	1,505
With an allowance recorded, Interest Recognized For The Period Ended	5	14	10	29
Real estate - commercial \| Construction
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	113	0	42	0
With no related allowance recorded, Interest Recognized For The Period Ended	0	0	0	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	0	48	24	49
With an allowance recorded, Interest Recognized For The Period Ended	0	0	0	0
Installment and other consumer
With no related allowance recorded:
With no related allowance recorded, Average Recorded Investment	137	2	34	31
With no related allowance recorded, Interest Recognized For The Period Ended	0	0	0	0
With an allowance recorded:
With an allowance recorded, Average Recorded Investment	172	51	167	48
With an allowance recorded, Interest Recognized For The Period Ended	$ 1	$ 0	$ 1	$ 0

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 http://asc.fasb.org/extlink&oid=84173941&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 http://asc.fasb.org/extlink&oid=84173941&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 http://asc.fasb.org/extlink&oid=84173941&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 http://asc.fasb.org/extlink&oid=84173941&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_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: