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Deposits (Detail Textuals) - USD ($) | Dec. 31, 2016 | Dec. 31, 2015
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Deposits |  |
Time deposits $250000 or more | $ 72,200,000 | $ 56,400,000
Minimum cash required | 1,600,000 | 1,600,000
Average compensating balances | $ 570,000 | $ 865,000

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- Definition The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $250,000 or more. + References No definition available. + Details
Name: | hwbk_TimeDeposits250000OrMore
Namespace Prefix: | hwbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of a specific compensating balance arrangement that is maintained under an agreement for a bank loan or future credit availability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CompensatingBalanceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition Minimum amount of net capital required to be maintained by the entity to engage in securities transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_MinimumNetCapitalRequiredForEntity1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant