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Employee Benefit Plans (Detail Textuals) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Compensation and Retirement Disclosure [Abstract] |  |  |  |  |
Employer match | 3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch |  |  |  |
Defined benefit plan contributions by employer percent | 6.00%hwbk_DefinedBenefitPlanContributionsByEmployerPercent |  |  |  |
Estimated prior service cost for the defined benefit pension plan that will be amortized from accumulated other comprehensive income into net periodic cost | $ 79,000 us-gaap_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit |  |  |  |
Assumed overall expected long-term rate of return on pension plan assets (in percent) | 7.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets | 7.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets | 7.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets |  |
Annual return on plan assets | 8.30%hwbk_DefinedBenefitPlanActualReturnOnPlanAssetsPercentage | 19.10%hwbk_DefinedBenefitPlanActualReturnOnPlanAssetsPercentage | 11.40%hwbk_DefinedBenefitPlanActualReturnOnPlanAssetsPercentage | 0.10%hwbk_DefinedBenefitPlanActualReturnOnPlanAssetsPercentage | 12.40%hwbk_DefinedBenefitPlanActualReturnOnPlanAssetsPercentage
Estimated pension expense in 2015 | 1,400,000 hwbk_EstimatedPensionExpenseForNextYear |  |  |  |
Pension Expense | $ 960,000 us-gaap_PensionExpense | $ 1,173,000 us-gaap_PensionExpense | $ 1,224,000 us-gaap_PensionExpense |  |

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- Definition Represents the percentage of difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable. + 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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- Definition Represents the maximum annual contributions, as a percent, made by the Company, of income before income taxes and before contributions to the profit-sharing and pension plans for all participants, limited to the maximum amount deductible for federal income tax purposes, for each of the periods shown. + References No definition available. + Details
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Namespace Prefix: | hwbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents estimated pension expense for next year. + References No definition available. + Details
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Namespace Prefix: | hwbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Balance Type: | na
Period Type: | duration

X
- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512013 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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Period Type: | duration

X
- Definition Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of pension benefit costs recognized during the period for (1) defined benefit plans and (2) defined contribution plans. For defined benefit plans, pension expense includes the following components: service cost, interest cost, expected return on plan assets, gain (loss) on plan assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. For defined contribution plans, the pension expense generally equals the firm's contribution to employees' accounts (if the firm contributes) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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Period Type: | duration