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Income Taxes (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income Taxes [Abstract]    
Federal statutory tax rate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate  
Other assets, deferred tax asset, net $ 666bhb_OtherAssetsDeferredTaxAssetNet $ 8,609bhb_OtherAssetsDeferredTaxAssetNet