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Long-Term Debt (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2008
Dec. 31, 2013
Long-Term Debt [Abstract]      
Callable Long Term Debt $ 17,000bhb_CallableLongTermDebt   $ 19,000bhb_CallableLongTermDebt
Subordinated Debt 5,000us-gaap_SubordinatedDebt    
Subordinated debt securities, years before callable option without penalty 5 years    
Subordinated debt securities, basis spread on variable rate 3.45%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1    
Incurred costs to issue subordinated debt securities   $ 197us-gaap_DebtIssuanceCosts  
Amortization of costs incurred, number of years used, interest method 15 years