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Employee Benefit Plans (Detail Textuals) (USD $)
 12 Months Ended
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 $ 79,000us-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 1,400,000hwbk_EstimatedPensionExpenseForNextYear        
Pension Expense $ 960,000us-gaap_PensionExpense $ 1,173,000us-gaap_PensionExpense $ 1,224,000us-gaap_PensionExpense