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Subordinated Debt (Details) (Subordinated debentures, USD $)
3 Months Ended 12 Months Ended 3 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Sep. 30, 2012
Heritage Capital Trust I
Sep. 30, 2012
Heritage Statutory Trust I
Sep. 30, 2013
Heritage Statutory Trust II
Sep. 30, 2013
Heritage Statutory Trust III
Sep. 30, 2013
Floating-Rate Sub Debt
Jun. 30, 2013
Floating-Rate Sub Debt
Subordinated Debt                  
Period of interest payment deferment 5 years                
Interest rate (as a percent)       10.875% 10.60%        
Subordinated debt, redemption amount $ 9,000,000     $ 7,000,000 $ 7,000,000 $ 5,000,000 $ 4,000,000    
Premium cost       304,500 296,800        
Dividends received from HBC as approved by DFI   15,000,000           9,000,000  
Early payoff premium on redemption of debt     601,300            
Agency origination fees incurred                 $ 167,000