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Commitments And Contingent Liabilities (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments And Contingencies Disclosure [Abstract]
Standby letters of credit terms, in years	5 years
Rent expense	$ 431us-gaap_LeaseAndRentalExpense	$ 430us-gaap_LeaseAndRentalExpense	$ 278us-gaap_LeaseAndRentalExpense

X

- Definition

Standby Letters Of Credit Term In Years

+ References

No definition available.

+ Details

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Namespace Prefix:	bhb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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X

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration