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Stock Compensation (Detail Textuals) (USD $)
0 Months Ended 3 Months Ended
Jul. 01, 2014
Mar. 31, 2015
Mar. 31, 2014
Stock compensation      
Grant of options to purchase (in shares)   569,392us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized  
Stock dividend (as a percent) 4.00%hwbk_CommonStockDividendsPercentage    
Stock based compensation expense   $ 4,000us-gaap_AllocatedShareBasedCompensationExpense $ 6,000us-gaap_AllocatedShareBasedCompensationExpense
Total unrecognized compensation expense related to non-vested stock awards   $ 26,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions  
Weighted average period is expected to be recognized   1 year 2 months 12 days  
Minimum      
Stock compensation      
Options vest over periods   4 years  
Maximum      
Stock compensation      
Options vest over periods   5 years