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Securities Available For Sale (Narrative) (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2015 USD ($) security shares	Dec. 31, 2013 USD ($)	Dec. 31, 2014 USD ($)
Schedule of Available for sale Securities [Line Items]
Total other-than-temporary impairment ("OTTI") losses			$ 359
OTTI recognized in pre-tax earnings amount, net of tax		$ 462		$ 478
Non-credit portion of OTTI losses (before taxes)	[1]		110
Net OTTI losses recognized in earnings			$ 249
Unrealized losses on securities		3,041		2,332
US Government-Sponsored Enterprises [Member]
Schedule of Available for sale Securities [Line Items]
Unrealized losses on securities		2,155		1,537
US Government Agency [Member]
Schedule of Available for sale Securities [Line Items]
Unrealized losses on securities		$ 547		529
Private Label [Member]
Schedule of Available for sale Securities [Line Items]
Number of private label MBS securities held | security		11
Unrealized gain, net of tax		$ 462
Unrealized losses on securities		11		14
Obligations Of States And Political Subdivisions Thereof [Member]
Schedule of Available for sale Securities [Line Items]
Unrealized losses on securities		328		$ 252
Accumulated Other-than-Temporary Impairment Attributable to Parent [Member] | Private Label [Member]
Schedule of Available for sale Securities [Line Items]
Amortized cost included OTTI losses		$ 1,236
Bar Harbor Bank & Trust [Member] | Visa Class B [Member]
Schedule of Available for sale Securities [Line Items]
Number of Visa Class shares owned | shares		11,623
Bar Harbor Bank & Trust [Member] | Visa Class A [Member]
Schedule of Available for sale Securities [Line Items]
Number of Visa Class shares owned | shares		19,158
Conversion ratio, Visa Class		1.648
[1] Included in other comprehensive income, net of taxes

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Balance held at close of period in number of shares.

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