Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Acquisition [Line Items]
Amortization of identified intangibles	$ 326	$ 283	$ 283
Core Deposits
Business Acquisition [Line Items]
Amortization of identified intangibles	43
Bank Acquisitions From Camden National Bank \| Core Deposits
Business Acquisition [Line Items]
Finite lived intangible asset, amortization (in years)	10 years
Amortization of identified intangibles	43
Amortization of Intangible Assets, Yearly Expense till Fully Amortized	43
FNB Bankshares \| Core Deposits
Business Acquisition [Line Items]
Finite lived intangible asset, amortization (in years)	10 years
Amortization of identified intangibles	283	283	283
Amortization of Intangible Assets, Yearly Expense till Fully Amortized	$ 283