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Earnings per Share - Stock Dividend (Details) | Jul. 01, 2021
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Earnings Per Share [Abstract] |
Special stock dividend, rate percent (in percent) | 4.00%

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- Definition The percentage rate used to calculate dividend payments on common stock. + References No definition available. + Details
Name: | hwbk_CommonStockDividendRatePercentage
Namespace Prefix: | hwbk_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration