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Fair Value Measurements (Detail Textuals) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Fair Value Disclosures [Abstract] |  |
Gains included in earnings attributable to change in unrealized gains or losses | $ 66,000 hwbk_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsAttributableToChangeInUnrealizedGains | $ 723,000 hwbk_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsAttributableToChangeInUnrealizedGains
Impaired loans with a specific allowance | 7,438,000 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment | 16,266,000 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Specific allowance related to impaired loans | 1,749,000 us-gaap_ImpairedFinancingReceivableRelatedAllowance | 4,796,000 us-gaap_ImpairedFinancingReceivableRelatedAllowance
Impaired financing receivable charge offs | $ 5,400,000 hwbk_ImpairedFinancingReceivableChargeOffs | $ 3,200,000 hwbk_ImpairedFinancingReceivableChargeOffs

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- Definition Represents fair value measurement with unobservable inputs reconciliation recurring basis asset gain loss included in earnings attributable to change in unrealized gains. + References No definition available. + Details
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Namespace Prefix: | hwbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents the amount related to charge off of impaired financing receivable during the period. + References No definition available. + Details
Name: | hwbk_ImpairedFinancingReceivableChargeOffs
Namespace Prefix: | hwbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of investment in impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant