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Earnings per Share (Parentheticals) (Details 2) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
Earnings Per Share [Abstract] |  |  |
Common Stock, Dividend Rate, Percentage | 4.00% | 4.00% | 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: | num: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