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Fair Value Measurements (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Impaired loans, specific reserves 776bhb_ImpairedFinancingReceivableReservesIncludedInAllowance $ 120bhb_ImpairedFinancingReceivableReservesIncludedInAllowance
Minimum [Member]    
Fair Value Inputs, Discount Rate 10.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Maximum [Member]    
Fair Value Inputs, Discount Rate 30.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember