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Employee Benefit Plans (Parentheticals) (Details 5) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract] |  |
Percentage of securities comprising of low-cost equity index funds not actively managed that track the MSCI EAFE | 31.00%hwbk_DefinedBenefitPlanPercentageOfSecuritiesComprisingOfLowCostEquityIndexFundsNotActivelyManagedThatTracksSpecifiedIndex | 32.00%hwbk_DefinedBenefitPlanPercentageOfSecuritiesComprisingOfLowCostEquityIndexFundsNotActivelyManagedThatTracksSpecifiedIndex

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- Definition Represents the percentage of securities comprising of low-cost equity index funds not actively managed that tracks the specified index. + References No definition available. + Details
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Namespace Prefix: | hwbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration