Condensed Financial Information - Parent Company Only (Statements Of Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Tax benefit	$ 1,195	$ 1,623	$ 1,511	$ 1,585	$ 5,914		$ 5,191		$ 4,944
Net income	3,102	3,867	3,857	3,787	14,613		13,183		12,466
Bar Harbor Bankshares [Member]
Dividend income from subsidiaries					5,697		4,883		4,097
Equity in undistributed earnings of subsidiaries					10,141	[1]	9,468	[1]	9,137	[1]
Bankshares expenses					(1,705)		(1,591)		(1,063)
Tax benefit					480		423		295
Net income					$ 14,613		$ 13,183		$ 12,466

[1] Amount in parentheses represents the excess of dividends over net income subsidiaries.