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v3.19.1

Commitments and Contingencies - Other (Details) | 12 Months Ended
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Dec. 31, 2018
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: |