Condensed Financial Information - Parent Company Only (Statements Of Cash Flow) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 14,613		$ 13,183		$ 12,466
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,629		1,504		1,292
Recognition of stock based expense	418		265		216
Net change in other assets	6,213		(752)		(711)
Net change in other liabilities	546		(139)		1,790
Net cash provided by operating activities	15,531		21,560		21,091
Cash flows from investing activities:
Capital expenditures	(2,002)		(2,394)		(3,894)
Net cash used in investing activities	(70,150)		(100,638)		(92,370)
Cash flows from financing activities:
Purchase of Treasury Stock	(8)		(24)		(181)
Proceeds from stock option exercises	453		345		1,174
Dividend paid	(5,362)		(4,915)		(4,565)
Net cash used in financing activities	55,219		73,286		77,551
Net (decrease) increase in cash	600		(5,792)		6,272
Cash and cash equivalents at beginning of period	9,200		14,992		8,720
Cash and cash equivalents at end of period	9,800		9,200		14,992
Bar Harbor Bankshares [Member]
Cash flows from operating activities:
Net income	14,613		13,183		12,466
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation			1		3
Recognition of stock based expense	418		265		216
Net change in other assets	(189)		331		(865)
Net change in other liabilities	415		389		663
Equity in undistributed earnings of subsidiaries	(10,141)	[1]	(9,468)	[1]	(9,137)	[1]
Net cash provided by operating activities	5,116		4,701		3,346
Cash flows from investing activities:
Capital expenditures	(1)		(1)		(3)
Net cash used in investing activities	(1)		(1)		(3)
Cash flows from financing activities:
Purchase of Treasury Stock	(8)		(24)		(181)
Proceeds from stock option exercises	616		461		1,187
Dividend paid	(5,362)		(4,915)		(4,565)
Net cash used in financing activities	(4,754)		(4,478)		(3,559)
Net (decrease) increase in cash	361		222		(216)
Cash and cash equivalents at beginning of period	760		538		754
Cash and cash equivalents at end of period	$ 1,121		$ 760		$ 538

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