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Commitments and Contingencies - Other (Details)	12 Months Ended
	Dec. 31, 2020
Minimum
Commitments and Contingencies
Remaining term of conditional commitment	1 month
Maximum
Commitments and Contingencies
Remaining term of conditional commitment	5 years

X

- Definition

Represents the remaining term of conditional commitment.

+ References

No definition available.

+ Details

Name:	hwbk_RemainingTermOfConditionalCommitment
Namespace Prefix:	hwbk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- 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

No definition available.

+ Details

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

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: