The First Bancorp, Inc. (FNLC) 10-K 13 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Mar. 01, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	First Bancorp, Inc /ME/
Entity Central Index Key	765207
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$168,470,000
Entity Common Stock, Shares Outstanding		10,733,599
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14

Consolidated_Balance_Sheets_Au

Consolidated Balance Sheets (Audited) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Assets
Cash and cash equivalents	$13,057	$16,570
Interest-bearing deposits in other banks	3,559	2,562
Securities available for sale	185,261	305,824
Securities to be held to maturity (fair value of $279,704,000 at December 31, 2014, $158,336,000 at December 31, 2013)	275,919	169,277
Restricted equity securities, at cost	13,912	13,912
Loans held for sale	0	83
Loans	917,564	876,367
Less allowance for loan losses	10,344	11,514
Net loans	907,220	864,853
Accrued interest receivable	4,748	5,038
Premises and equipment, net	22,619	23,616
Other real estate owned	3,785	4,807
Goodwill	29,805	29,805
Other assets	22,246	27,616
Total assets	1,482,131	1,463,963
Liabilities
Demand deposits	113,133	106,125
NOW deposits	199,977	151,322
Money market deposits	98,607	86,730
Savings deposits	165,601	149,103
Certificates of deposit	447,501	531,119
Total deposits	1,024,819	1,024,399
Borrowed funds – short term	189,775	148,977
Borrowed funds – long term	90,141	130,148
Other liabilities	15,842	14,341
Total liabilities	1,320,577	1,317,865
Commitments and contingent liabilities
Shareholders' equity
Common stock, one cent par value per share	107	106
Additional paid-in capital	59,282	58,395
Retained earnings	99,816	94,000
Accumulated other comprehensive income (loss)
Net unrealized gain (loss) on securities available-for-sale	2,522	-6,591
Net unrealized loss on securities transferred from available for sale to held to maturity	-48	0
Net unrecognized gain (loss) on postretirement benefit costs	-125	188
Total shareholders' equity	161,554	146,098
Total liabilities and shareholders' equity	$1,482,131	$1,463,963
Common stock
Number of shares authorized	18,000,000	18,000,000
Number of shares issued and outstanding	10,724,359	10,671,192
Book value per common share	$15.06	$13.69
Tangible book value per common share	$12.25	$10.83

Consolidated_Balance_Sheets_Au1

Consolidated Balance Sheets (Audited) (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Per Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Common Stock, Par or Stated Value Per Share	$0.01	$0.01
Assets
Securities to be held to maturity, fair value	$279,704	$158,336

Consolidated_Statements_of_Inc

Consolidated Statements of Income (Audited) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest and dividend income
Interest and fees on loans (includes tax-exempt income of $592,000 in 2014, $567,000 in 2013, and $629,000 in 2012)	$35,102	$34,897	$37,026
Interest on deposits with other banks	5	8	4
Interest and dividends on investments (includes tax-exempt income of $5,854,000 in 2014, $6,065,000 in 2013, and $5,175,000 in 2012)	15,915	15,031	14,795
Total interest and dividend income	51,022	49,936	51,825
Interest expense
Interest on deposits	7,087	7,997	8,396
Interest on borrowed funds	4,338	4,499	4,542
Total interest expense	11,425	12,496	12,938
Net interest income	39,597	37,440	38,887
Provision for loan losses	1,150	4,200	7,835
Net interest income after provision for loan losses	38,447	33,240	31,052
Non-interest income
Fiduciary and investment management income	2,139	1,919	1,636
Service charges on deposit accounts	2,505	2,756	2,671
Net securities gains	1,155	1,087	1,968
Mortgage origination and servicing income	979	2,080	1,396
Other operating income	4,270	4,245	3,607
Total non-interest income	11,048	12,087	11,278
Non-interest expense
Salaries and employee benefits	14,890	14,305	12,691
Occupancy expense	2,215	2,050	1,639
Furniture and equipment expense	2,940	2,656	2,235
FDIC insurance premiums	1,004	1,143	1,212
Acquisition-related costs	0	0	251
Amortization of identified intangibles	326	326	283
Other operating expense	8,845	8,457	7,960
Total non-interest expense	30,220	28,937	26,271
Income before income taxes	19,275	16,390	16,059
Applicable tax expense	4,566	3,425	3,371
Net income	14,709	12,965	12,688
Basic earnings per common share (in usd per share)	$1.38	$1.20	$1.22
Diluted earnings per common share (in usd per share)	$1.37	$1.20	$1.22
Other comprehensive income (loss), net of tax
Net unrealized gain (loss) on securities available for sale	9,113	-14,531	539
Net unrealized loss on securities transferred from available for sale to held to maturity, net of amortization	-48	0	0
Net unrecognized gain (loss) on postretirement benefits	-313	311	-36
Other comprehensive income (loss)	8,752	-14,220	503
Comprehensive income (loss)	$23,461	($1,255)	$13,191

Consolidated_Statements_of_Inc1

Consolidated Statements of Income (Audited) (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Interest and fees on loans (tax-exempt income)	$592	$567	$629
Interest and dividends on investments (tax-exempt income)	$5,854	$6,065	$5,175

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (Audited) (USD $)	Total	Preferred stock	Common stock and additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)
In Thousands, except Share data, unless otherwise specified
Balance at Dec. 31, 2011	$150,858	$12,303	$45,927	$85,314	$7,314
Balance (in shares) at Dec. 31, 2011			9,812,180
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,688			12,688
Net unrealized gain (loss) on securities available for sale, net of tax	539				539
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	0
Unrecognized loss and transition obligation for post-retirement benefits, net of tax	-36				-36
Comprehensive income (loss)	13,191			12,688	503
Cash dividends declared on preferred stock	-625			-625
Cash dividends declared ($0.78 in 2012, $0.785 in 2013 and $0.83 in 2014)	-7,685			-7,685
Equity compensation expense	85		85
Amortization of premium for preferred stock issuance		99	-99
Repurchase of preferred stock	0
Issuance of restricted stock			12,727
Proceeds from sale of common stock	499		499
Proceeds from sale of common stock (in shares)			35,007
Balance at Dec. 31, 2012	156,323	12,402	46,412	89,692	7,817
Balance (in shares) at Dec. 31, 2012			9,859,914
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,965			12,965
Net unrealized gain (loss) on securities available for sale, net of tax	-14,531				-14,531
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	0
Unrecognized loss and transition obligation for post-retirement benefits, net of tax	311				311
Comprehensive income (loss)	-1,255			12,965	-14,220
Cash dividends declared on preferred stock	-286			-286
Cash dividends declared ($0.78 in 2012, $0.785 in 2013 and $0.83 in 2014)	-8,371			-8,371
Equity compensation expense	214		214
Amortization of premium for preferred stock issuance		98	-98
Stock Repurchased During Period, Value	-12,500	-12,500
Repurchase of preferred stock	-12,500
Issuance of restricted stock			27,114
Proceeds from sale of common stock	11,973		11,973
Proceeds from sale of common stock (in shares)			784,164
Balance at Dec. 31, 2013	146,098	0	58,501	94,000	-6,403
Balance (in shares) at Dec. 31, 2013	10,671,192		10,671,192
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,709			14,709
Net unrealized gain (loss) on securities available for sale, net of tax	9,113				9,113
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	-48				-48
Unrecognized loss and transition obligation for post-retirement benefits, net of tax	-313				-313
Comprehensive income (loss)	23,461			14,709	8,752
Cash dividends declared ($0.78 in 2012, $0.785 in 2013 and $0.83 in 2014)	-8,893			-8,893
Equity compensation expense	431		431
Repurchase of preferred stock	0
Issuance of restricted stock			25,843
Proceeds from sale of common stock	457		457
Proceeds from sale of common stock (in shares)			27,324
Balance at Dec. 31, 2014	$161,554	$0	$59,389	$99,816	$2,349
Balance (in shares) at Dec. 31, 2014	10,724,359		10,724,359

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Shareholders' Equity (Audited) (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Cash dividends declared, per share	$0.83	$0.79	$0.78

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Audited) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Cash Flows [Abstract]
Net income	$14,709,000	$12,965,000	$12,688,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,663,000	1,727,000	1,314,000
Change in deferred taxes	18,000	-56,000	-108,000
Provision for loan losses	1,150,000	4,200,000	7,835,000
Loans originated for resale	-21,758,000	-56,377,000	-40,606,000
Proceeds from sales and transfers of loans	22,337,000	58,553,000	40,712,000
Net gain on sales of loans	-496,000	-1,224,000	-1,141,000
Net gain on sale or call of securities	-1,155,000	-1,087,000	-1,968,000
Net amortization of investment premiums	943,000	1,817,000	2,676,000
Net (gain) loss on sale of other real estate owned	32,000	-25,000	-7,000
Provision for losses on other real estate owned	637,000	501,000	397,000
Equity compensation expense	431,000	214,000	85,000
Net decrease in other assets and accrued interest	676,000	1,557,000	756,000
Net increase in other liabilities	378,000	1,370,000	1,631,000
Net loss on disposal of premises and equipment	3,000	3,000	0
Amortization of investments in limited partnerships	569,000	520,000	476,000
Net acquisition amortization	326,000	326,000	283,000
Net cash provided by operating activities	20,463,000	24,984,000	25,023,000
Cash flows from investing activities
Increase in interest-bearing deposits in other banks	-997,000	-924,000	-1,638,000
Proceeds from sales of securities available for sale	15,557,000	10,563,000	26,437,000
Proceeds from maturities, payments, calls of securities available for sale	30,226,000	55,399,000	61,776,000
Proceeds from maturities, payments, calls of securities held to maturity	18,085,000	36,872,000	53,958,000
Proceeds from sales of other real estate owned	2,624,000	5,416,000	3,345,000
Purchases of securities available for sale	-908,000	-103,359,000	-93,378,000
Purchases of securities to be held to maturity	-34,881,000	-62,727,000	-74,743,000
Redemption of restricted equity securities	0	536,000	995,000
Net increase in loans	-45,788,000	-15,375,000	-19,635,000
Capital expenditures	-1,909,000	-2,363,000	-1,726,000
Proceeds from sale of premises and equipment	1,240,000	5,000	42,000
Cash Acquired from Acquisition	0	0	25,297,000
Net cash used in investing activities	-16,751,000	-75,957,000	-19,270,000
Cash flows from financing activities
Net increase in transaction and savings accounts	84,038,000	39,486,000	37,552,000
Net increase (decrease) in certificates of deposit	-83,618,000	26,063,000	-51,893,000
Repayment on long-term borrowings	-30,000,000	-3,780,000	0
Net increase in short-term borrowings	30,791,000	0	17,242,000
Repurchase of preferred stock	0	-12,500,000	0
Proceeds from sale of common stock	457,000	11,973,000	499,000
Dividends paid	-8,893,000	-8,657,000	-8,310,000
Net cash provided by (used in) financing activities	-7,225,000	52,585,000	-4,910,000
Net increase (decrease) in cash and cash equivalents	-3,513,000	1,612,000	843,000
Cash and cash equivalents at beginning of year	16,570,000	14,958,000	14,115,000
Cash and cash equivalents at end of year	13,057,000	16,570,000	14,958,000
Interest paid	11,503,000	12,516,000	13,052,000
Income taxes paid	5,150,000	2,000,000	2,547,000
Non-cash transactions:
Net transfer from loans to other real estate owned	2,271,000	3,106,000	7,234,000
Fair value of assets acquired	0	0	-6,577,000
Less liabilities assumed	0	0	31,874,000
Transfer of securities from available for sale to held to maturity	$89,757,000	$0	$0

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies
	Principles of Consolidation
	The consolidated financial statements include the accounts of the Company and the Bank. All intercompany accounts and transactions have been eliminated in consolidation.
	Subsequent Events
	Events occurring subsequent to December 31, 2014, have been evaluated as to their potential impact to the financial statements.
	Use of Estimates in Preparation of Financial Statements
	In preparing the financial statements in accordance with accounting principles generally accepted in the United States of America ("GAAP"), Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the balance sheet and revenues and expenses for the reporting period. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change in the near-term relate to the determination of the allowance for loan losses, goodwill, the valuation of mortgage servicing rights, and other-than-temporary impairment of securities.
	Investment Securities
	Investment securities are classified as available for sale or held to maturity when purchased. There are no trading account securities. Securities available for sale consist primarily of debt securities which Management intends to hold for indefinite periods of time. They may be used as part of the Bank's funds management strategy, and may be sold in response to changes in interest rates or prepayment risk, changes in liquidity needs, or for other reasons. They are accounted for at fair value, with unrealized gains or losses adjusted through shareholders' equity, net of related income taxes. The cost basis is adjusted for the amortization of premiums and accretion of discounts. Securities to be held to maturity consist primarily of debt securities which Management has acquired solely for long-term investment purposes, rather than for purposes of trading or future sale. For securities to be held to maturity, Management has the intent and the Bank has the ability to hold such securities until their respective maturity dates. Such securities are carried at cost adjusted for the amortization of premiums and accretion of discounts. Investment securities transactions are accounted for on a settlement date basis; reported amounts would not be materially different from those accounted for on a trade date basis. Gains and losses on the sales of investment securities are determined using the amortized cost of the specifically identified security. For declines in the fair value of individual debt securities available for sale below their cost that are deemed to be other than temporary, where the Company does not intend to sell the security and it is more likely than not that the Company will not be required to sell the security before recovery of its amortized cost basis, the other-than-temporary decline in the fair value of the debt security related to 1) credit loss is recognized in earnings and 2) other factors is recognized in other comprehensive income or loss. Credit loss is deemed to exist if the present value of expected future cash flows using the effective rate at acquisition is less than the amortized cost basis of the debt security. For individual debt securities where the Company intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost, the other-than-temporary impairment is recognized in earnings equal to the entire difference between the security's cost basis and its fair value at the balance sheet date.
	Loans Held for Sale
	Loans held for sale consist of residential real estate mortgage loans and are carried at the lower of aggregate cost or fair value, as determined by current investor yield requirements.
	Loans
	Loans are generally reported at their outstanding principal balances, adjusted for chargeoffs, the allowance for loan losses and any deferred fees or costs to originate loans. Loan commitments are recorded when funded.
	Loan Fees and Costs
	Loan origination fees and certain direct loan origination costs are deferred and recognized in interest income as an adjustment to the loan yield over the life of the related loans. The unamortized net deferred fees and costs are included on the balance sheets with the related loan balances, and the amortization is included with the related interest income.
	Allowance for Loan Losses
	Loans considered to be uncollectible are charged against the allowance for loan losses. The allowance for loan losses is maintained at a level determined by Management to be appropriate to absorb probable losses. This allowance is increased by provisions charged to operating expenses and recoveries on loans previously charged off. Arriving at an appropriate level of allowance for loan losses necessarily involves a high degree of judgment. In determining the appropriate level of allowance for loan losses, Management takes into consideration several factors, including reviews of individual non-performing loans and performing loans listed on the watch report requiring periodic evaluation, loan portfolio size by category, recent loss experience, delinquency trends and current economic conditions. For all loan classes, loans over 30 days past due are considered delinquent. Impaired loans include restructured loans and loans placed on non-accrual status when, based on current information and events, it is probable that the Bank will be unable to collect all amounts due according to the contractual terms of the loan agreement. These loans are measured at the present value of expected future cash flows discounted at the loan's effective interest rate or at the fair value of the collateral if the loan is collateral dependent. Management takes into consideration impaired loans in addition to the above mentioned factors in determining the appropriate level of allowance for loan losses.
	Troubled Debt Restructured
	A troubled debt restructured ("TDR") constitutes a restructuring of debt if the Bank, for economic or legal reasons related to the borrower's financial difficulties, grants a concession to the borrower that it would not otherwise consider. To determine whether or not a loan should be classified as a TDR, Management evaluates a loan to first determine if the borrower demonstrates financial difficulty. Common indicators of this include past due status with bank obligations, substandard credit bureau reports, or an inability to refinance with another lender. If the borrower is experiencing financial difficulty and concessions are granted, such as maturity date extension, interest rate adjustments to below market pricing, or a deferment of payments, the loan will generally be classified as a TDR.
	Accrual of Interest Income and Expense
	Interest on loans and investment securities is taken into income using methods which relate the income earned to the balances of loans and investment securities outstanding. Interest expense on liabilities is derived by applying applicable interest rates to principal amounts outstanding. For all classes of loans, recording of interest income on problem loans, which includes impaired loans, ceases when collectibility of principal and interest within a reasonable period of time becomes doubtful. Cash payments received on non-accrual loans, which includes impaired loans, are applied to reduce the loan's principal balance until the remaining principal balance is deemed collectible, after which interest is recognized when collected. As a general rule, a loan may be restored to accrual status when payments are current for a substantial period of time, generally six months, and repayment of the remaining contractual amounts is expected or when it otherwise becomes well secured and in the process of collection.
	Premises and Equipment
	Premises, furniture and equipment are stated at cost, less accumulated depreciation. Depreciation expense is computed by straight-line methods over the asset's estimated useful life.
	Other Real Estate Owned ("OREO")
	Real estate acquired by foreclosure or deed in lieu of foreclosure is transferred to OREO and recorded at fair value, less estimated costs to sell, based on appraised value at the date actually or constructively received. Loan losses arising from the acquisition of such property are charged against the allowance for loan losses. Subsequent provisions to reduce the carrying value of a property are recorded to the allowance for OREO losses and a charge to operations on a specific property basis.
	Goodwill and Identified Intangible Assets
	Intangible assets include the excess of the purchase price over the fair value of net assets acquired (goodwill) from the acquisition of FNB Bankshares in 2005 as well as the core deposit intangible related to the same acquisition. The core deposit intangible is amortized on a straight-line basis over ten years. Annual amortization expense for 2014, 2013 and 2012 was $283,000 and the amortization expense for 2015 will be $14,000 as the expense will be fully amortized. Intangible assets also include the goodwill and core deposit intangible from the 2012 acquisition of a bank branch in Rockland, Maine and a bank building in Bangor, Maine. The core deposit intangible will be amortized on a straight-line basis over ten years. Annual amortization expense for 2014 and 2013 was $43,000, and the amortization expense for each year until fully amortized will be $43,000. The straight-line basis is used because the Company does not expect significant run off in the core deposits acquired. The Company annually evaluates goodwill, and periodically evaluates other intangible assets, for impairment. At December 31, 2014, the Company determined goodwill and other intangible assets were not impaired.
	Income Taxes
	Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between financial statement carrying amounts of assets and liabilities and their respective tax bases, and for tax credits that are available to offset future taxable income. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period the change is enacted.
	Loan Servicing
	Servicing rights are recognized when they are acquired through sale of loans. Capitalized servicing rights are reported in other assets and are amortized into non-interest income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing rights are evaluated for impairment based upon the fair value of the rights as compared to amortized cost. Impairment is determined by stratifying rights by predominant characteristics, such as interest rates and terms. Impairment is recognized through a valuation allowance for an individual stratum, to the extent that fair value is less than the capitalized amount for the stratum.
	Post-Retirement Benefits
	The cost of providing post-retirement benefits is accrued during the active service period of the employee or director.
	Earnings Per Share
	Basic earnings per share data are based on the weighted average number of common shares outstanding during each year. Diluted earnings per share gives effect to restricted stock granted and stock options and warrants outstanding, determined by the treasury stock method.
	Comprehensive Income
	Comprehensive income includes net income and other comprehensive income (loss), which is comprised of the change in unrealized gains and losses on securities available for sale, net of tax, change in unrealized losses on securities transferred from available for sale to held to maturity, net of amortization, and unrecognized gains and losses related to post-retirement benefit costs, net of tax.
	Segments
	The First Bancorp, Inc., through the branches of its subsidiary, The First, N.A., provides a broad range of financial services to individuals and companies in coastal Maine. These services include demand, time, and savings deposits; lending; ATM processing; and investment management and trust services. Operations are managed and financial performance is evaluated on a corporate-wide basis. Accordingly, all of the Company's banking operations are considered by Management to be aggregated in one reportable operating segment.

Cash_and_Cash_Equivalents

Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2014
Notes to Financial Statements [Abstract]
Cash and Cash Equivalents	Cash and Cash Equivalents
	For the purposes of reporting consolidated cash flows, cash and cash equivalents include cash on hand, amounts due from banks and federal funds sold. At December 31, 2014, the Company had a contractual clearing balance of $500,000 and a reserve balance requirement of $1,184,000 at the Federal Reserve Bank, which are satisfied by both cash on hand at branches and balances held at the Federal Reserve Bank of Boston. The Company maintains a portion of its cash in bank deposit accounts which, at times, may exceed federally insured limits. The Company has not experienced any losses in such accounts. The Company believes it is not exposed to any significant risk with respect to these accounts.

Investment_Securities

Investment Securities	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities
	The following tables summarize the amortized cost and estimated fair value of investment securities at December 31, 2014 and 2013:
		Amortized		Unrealized			Unrealized			Fair Value
	As of December 31, 2014	Cost		Gains			Losses			(Estimated)
	Securities available for sale
	Mortgage-backed securities	$	149,796,000	$	2,637,000		$	(578,000	)	$	151,855,000
	State and political subdivisions	29,094,000		1,865,000			(104,000		)	30,855,000
	Other equity securities	2,490,000		65,000			(4,000		)	2,551,000
		$	181,380,000	$	4,567,000		$	(686,000	)	$	185,261,000
	Securities to be held to maturity
	U.S. Government-sponsored agencies	$	92,341,000	$	54,000		$	(2,066,000	)	$	90,329,000
	Mortgage-backed securities	57,003,000		1,830,000			(116,000		)	58,717,000
	State and political subdivisions	126,275,000		4,114,000			(31,000		)	130,358,000
	Corporate securities	300,000		—			—			300,000
		$	275,919,000	$	5,998,000		$	(2,213,000	)	$	279,704,000
	Restricted equity securities
	Federal Home Loan Bank Stock	$	12,875,000	$	—		$	—		$	12,875,000
	Federal Reserve Bank Stock	1,037,000		—			—			1,037,000
		$	13,912,000	$	—		$	—		$	13,912,000
		Amortized		Unrealized			Unrealized			Fair Value
	As of December 31, 2013	Cost		Gains			Losses			(Estimated)
	Securities available for sale
	Mortgage-backed securities	$	180,109,000	$	1,392,000		$	(3,772,000	)	$	177,729,000
	State and political subdivisions	134,188,000		1,458,000			(9,331,000		)	126,315,000
	Other equity securities	1,666,000		116,000			(2,000		)	1,780,000
		$	315,963,000	$	2,966,000		$	(13,105,000	)	$	305,824,000
	Securities to be held to maturity
	U.S. Government-sponsored agencies	$	92,280,000	$	1,000		$	(12,757,000	)	$	79,524,000
	Mortgage-backed securities	35,712,000		1,440,000			(1,336,000		)	35,816,000
	State and political subdivisions	40,985,000		1,823,000			(112,000		)	42,696,000
	Corporate securities	300,000		—			—			300,000
		$	169,277,000	$	3,264,000		$	(14,205,000	)	$	158,336,000
	Restricted equity securities
	Federal Home Loan Bank Stock	$	12,875,000	$	—		$	—		$	12,875,000
	Federal Reserve Bank Stock	1,037,000		—			—			1,037,000
		$	13,912,000	$	—		$	—		$	13,912,000
	The following table summarizes the contractual maturities of investment securities at December 31, 2014:
		Securities available for sale					Securities to be held to maturity
		Amortized Cost		Fair Value (Estimated)			Amortized Cost			Fair Value (Estimated)
	Due in 1 year or less	$	2,309,000	$	2,329,000		$	1,693,000		$	1,713,000
	Due in 1 to 5 years	15,200,000		15,499,000			8,467,000			8,702,000
	Due in 5 to 10 years	18,547,000		19,124,000			50,629,000			52,717,000
	Due after 10 years	142,834,000		145,758,000			215,130,000			216,572,000
	Equity securities	2,490,000		2,551,000			—			—
		$	181,380,000	$	185,261,000		$	275,919,000		$	279,704,000
	The following table summarizes the contractual maturities of investment securities at December 31, 2013:
		Securities available for sale					Securities to be held to maturity
	In thousands of dollars	Amortized		Fair Value (Estimated)			Amortized			Fair Value (Estimated)
		Cost					Cost
	Due in 1 year or less	$	717,000	$	721,000		$	268,000		$	273,000
	Due in 1 to 5 years	20,547,000		20,636,000			6,420,000			6,790,000
	Due in 5 to 10 years	16,114,000		16,267,000			33,442,000			33,828,000
	Due after 10 years	276,919,000		266,420,000			129,147,000			117,445,000
	Equity securities	1,666,000		1,780,000			—			—
		$	315,963,000	$	305,824,000		$	169,277,000		$	158,336,000
	At December 31, 2014, securities with a fair value of $164,919,000 were pledged to secure borrowings from the Federal Home Loan Bank of Boston, public deposits, repurchase agreements, and for other purposes as required by law. This compares to securities with a fair value of $147,074,000 as of December 31, 2013 pledged for the same purposes.
	Gains and losses on the sale of securities available for sale are computed by subtracting the amortized cost at the time of sale from the security's selling price, net of accrued interest to be received.
	The following table shows securities gains and losses for 2014, 2013 and 2012:
		2014		2013			2012
	Proceeds from sales of securities	$	15,557,000	$	10,563,000		$	26,437,000
	Gross realized gains	1,155,000		1,087,000			2,257,000
	Gross realized losses	—		—			(289,000		)
	Net gain	$	1,155,000	$	1,087,000		$	1,968,000
	Related income taxes	$	404,000	$	380,000		$	689,000
Management reviews securities with unrealized losses for other than temporary impairment. As of December 31, 2014, there were 56 securities with unrealized losses held in the Company's portfolio. These securities were temporarily impaired as a result of changes in interest rates reducing their fair value, of which 36 had been temporarily impaired for 12 months or more. At the present time, there have been no material changes in the credit quality of these securities resulting in other than temporary impairment, and in Management's opinion, no additional write-down for other-than-temporary impairment is warranted.
Information regarding securities temporarily impaired as of December 31, 2014 is summarized below:
	Less than 12 months					12 months or more						Total
	Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
As of December 31, 2014	Value		Losses			Value			Losses			Value		Losses
U.S. Government-sponsored agencies	$	—	$	—		$	79,444,000		$	(2,066,000	)	$	79,444,000	$	(2,066,000	)
Mortgage-backed securities	13,878,000		(40,000		)	29,182,000			(654,000		)	43,060,000		(694,000		)
State and political subdivisions	3,352,000		(31,000		)	3,017,000			(104,000		)	6,369,000		(135,000		)
Other equity securities	68,000		(3,000		)	51,000			(1,000		)	119,000		(4,000		)
	$	17,298,000	$	(74,000	)	$	111,694,000		$	(2,825,000	)	$	128,992,000	$	(2,899,000	)
Information regarding securities temporarily impaired as of December 31, 2013 is summarized below:
	Less than 12 months					12 months or more						Total
	Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
As of December 31, 2013	Value		Losses			Value			Losses			Value		Losses
U.S. Government-sponsored agencies	$	78,724,000	$	(12,757,000	)	$	—		$	—		$	78,724,000	$	(12,757,000	)
Mortgage-backed securities	96,263,000		(4,977,000		)	5,451,000			(131,000		)	101,714,000		(5,108,000		)
State and political subdivisions	69,406,000		(7,895,000		)	7,150,000			(1,548,000		)	76,556,000		(9,443,000		)
Other equity securities	—		—			50,000			(2,000		)	50,000		(2,000		)
	$	244,393,000	$	(25,629,000	)	$	12,651,000		$	(1,681,000	)	$	257,044,000	$	(27,310,000	)
During the third quarter of 2014, the Company transferred securities with a total amortized cost of $89,780,000 and a
corresponding fair value of $89,757,000 from available for sale to held to maturity. The net unrealized loss, net of taxes, on
these securities at the date of the transfer was $15,000. The net unrealized holding loss at the time of transfer continues to be
reported in accumulated other comprehensive income (loss), net of tax and is amortized over the remaining lives of the
securities as an adjustment of the yield. The amortization of the net unrealized loss reported in accumulated other
comprehensive income (loss) will offset the effect on interest income of the discount for the transferred securities. The
remaining unamortized balance of the net unrealized losses for the securities transferred from available for sale to held to
maturity was $48,000 at December 31, 2014. These securities were transferred as a part of the Company's overall investment
and balance sheet strategies.
The Bank is a member of the Federal Home Loan Bank ("FHLB") of Boston, a cooperatively owned wholesale bank for housing and finance in the six New England States. As a requirement of membership in the FHLB, the Bank must own a minimum required amount of FHLB stock, calculated periodically based primarily on its level of borrowings from the FHLB. The Bank uses the FHLB for much of its wholesale funding needs. As of December 31, 2014 and 2013, the Bank's investment in FHLB stock totaled $12,875,000. FHLB stock is a restricted equity security and therefore is reported at cost, which equals par value.
The Company periodically evaluates its investment in FHLB stock for impairment based on, among other factors, the capital adequacy of the FHLB and its overall financial condition. No impairment losses have been recorded through December 31, 2014. The Bank will continue to monitor its investment in FHLB stock.

Mortgage_Servicing_Rights

Mortgage Servicing Rights	12 Months Ended
	Dec. 31, 2014
Transfers and Servicing [Abstract]
Mortgage Servicing Rights	Mortgage Servicing Rights
	At December 31, 2014 and 2013, the Bank serviced loans for others totaling $214,086,000 and $211,634,000, respectively. Net gains from the sale of loans totaled $496,000 in 2014, $1,224,000 in 2013, and $1,141,000 in 2012. In 2014, mortgage servicing rights of $345,000 were capitalized and amortization for the year totaled $428,000. At December 31, 2014, mortgage servicing rights had a fair value of $2,088,000. In 2013, mortgage servicing rights of $743,000 were capitalized and amortization for the year totaled $515,000. At December 31, 2013, mortgage servicing rights had a fair value of $1,948,000.
	The Financial Accounting Standards Board ("FASB") Accounting Standards Codification (the "Codification" or "ASC") Topic 860, "Transfers and Servicing", requires all separately recognized servicing assets and servicing liabilities to be initially measured at fair value, if practicable. Servicing assets and servicing liabilities are reported using the amortization method or the fair value measurement method. In evaluating the carrying values of mortgage servicing rights, the Company obtains third party valuations based on loan level data including note rate, type and term of the underlying loans. The model utilizes several assumptions, the most significant of which is loan prepayments, calculated using a three-month moving average of weekly prepayment data published by the Public Securities Association (PSA) and modeled against the serviced loan portfolio, and the discount rate to discount future cash flows. As of December 31, 2014, the prepayment assumption using the PSA model was 190, which translates into an anticipated prepayment rate of 11.38%. The discount rate is the quarterly average ten-year U.S. Treasury interest rate plus 4.76%. Other assumptions include delinquency rates, foreclosure rates, servicing cost inflation, and annual unit loan cost. All assumptions are adjusted periodically to reflect current circumstances. Amortization of mortgage servicing rights, as well as write-offs due to prepayments of the related mortgage loans, are recorded as a charge against mortgage servicing fee income.
	Mortgage servicing rights are included in other assets and detailed in the following table:
	As of December 31,	2014			2013
	Mortgage servicing rights	$	6,039,000		$	7,172,000
	Accumulated amortization	(4,949,000		)	(5,988,000		)
	Impairment reserve	(4,000		)	(26,000		)
		$	1,086,000		$	1,158,000

Loans

Loans	12 Months Ended
	Dec. 31, 2014
Loans and Leases Receivable Disclosure [Abstract]
Loans	Loans
	The following table shows the composition of the Company's loan portfolio as of December 31, 2014 and 2013:
		December 31, 2014							December 31, 2013
	Commercial
	Real estate	$	242,311,000			26.4	%		$	245,943,000		28.2	%
	Construction	30,932,000				3.4	%		20,382,000			2.3	%
	Other	104,531,000				11.4	%		95,289,000			10.9	%
	Municipal	20,424,000				2.2	%		19,117,000			2.2	%
	Residential
	Term	384,032,000				41.9	%		377,218,000			43	%
	Construction	12,160,000				1.3	%		11,803,000			1.3	%
	Home equity line of credit	103,521,000				11.3	%		91,549,000			10.4	%
	Consumer	19,653,000				2.1	%		15,066,000			1.7	%
	Total loans	$	917,564,000			100	%		$	876,367,000		100	%
	Loan balances include net deferred loan costs of $2,729,000 in 2014 and $2,086,000 in 2013. Pursuant to collateral agreements, qualifying first mortgage loans, which were valued at $266,716,000 and $266,740,000 at December 31, 2014 and 2013, respectively, were used to collateralize borrowings from the Federal Home Loan Bank of Boston. In addition, commercial, construction and home equity loans totaling $240,943,000 at December 31, 2014 and $189,728,000 at December 2013, were used to collateralize a standby line of credit at the Federal Reserve Bank of Boston that is currently unused.
	At December 31, 2014 and 2013, non-accrual loans were $10,510,000 and $16,318,000, respectively. As of December 31, 2014, 2013 and 2012, interest income which would have been recognized on these loans, if interest had been accrued, was $551,000, $917,000, and $1,158,000, respectively. Loans more than 90 days past due accruing interest totaled $181,000 at December 31, 2014 and $1,043,000 at December 31, 2013. The Company continues to accrue interest on these loans because it believes collection of principal and interest is reasonably assured.
	Loans to directors, officers and employees totaled $29,883,000 at December 31, 2014 and $28,821,000 at December 31, 2013. A summary of loans to directors and executive officers is as follows:
	For the years ended December 31,	2014				2013
	Balance at beginning of year	$	14,884,000			$	14,917,000
	New loans	8,932,000				909,000
	Repayments	(8,960,000		)		(942,000		)
	Balance at end of year	$	14,856,000			$	14,884,000
	Information on the past-due status of loans as of December 31, 2014, is presented in the following table:
		30-59 Days				60-89 Days				90+ Days			All		Current		Total		90+ Days
		Past Due				Past Due				Past Due			Past Due						&
																			Accruing
	Commercial
	Real estate	$	24,000			$	75,000			$	761,000		$	860,000	$	241,451,000	$	242,311,000	$	—
	Construction	—				41,000				208,000			249,000		30,683,000		30,932,000		—
	Other	3,000				—				857,000			860,000		103,671,000		104,531,000		—
	Municipal	—				—				—			—		20,424,000		20,424,000		—
	Residential
	Term	856,000				468,000				5,679,000			7,003,000		377,029,000		384,032,000		101,000
	Construction	—				—				—			—		12,160,000		12,160,000		—
	Home equity line of credit	622,000				720,000				780,000			2,122,000		101,399,000		103,521,000		—
	Consumer	637,000				52,000				80,000			769,000		18,884,000		19,653,000		80,000
	Total	$	2,142,000			$	1,356,000			$	8,365,000		$	11,863,000	$	905,701,000	$	917,564,000	$	181,000
	Information on the past-due status of loans as of December 31, 2013, is presented in the following table:
		30-59 Days Past Due				60-89 Days Past Due				90+ Days Past Due			All Past Due		Current		Total		90+ Days & Accruing
	Commercial
	Real estate	$	82,000			$	259,000			$	745,000		$	1,086,000	$	244,857,000	$	245,943,000	$	—
	Construction	—				—				—			—		20,382,000		20,382,000		—
	Other	544,000				128,000				2,797,000			3,469,000		91,820,000		95,289,000		—
	Municipal	—				—				—			—		19,117,000		19,117,000		—
	Residential
	Term	229,000				1,913,000				7,002,000			9,144,000		368,074,000		377,218,000		596,000
	Construction	47,000				—				—			47,000		11,756,000		11,803,000		—
	Home equity line of credit	573,000				145,000				1,001,000			1,719,000		89,830,000		91,549,000		59,000
	Consumer	113,000				26,000				388,000			527,000		14,539,000		15,066,000		388,000
	Total	$	1,588,000			$	2,471,000			$	11,933,000		$	15,992,000	$	860,375,000	$	876,367,000	$	1,043,000
	For all classes, loans are placed on non-accrual status when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement or when principal and interest is 90 days or more past due unless the loan is both well secured and in the process of collection (in which case the loan may continue to accrue interest in spite of its past due status). A loan is "well secured" if it is secured (1) by collateral in the form of liens on or pledges of real or personal property, including securities, that have a realizable value sufficient to discharge the debt (including accrued interest) in full, or (2) by the guarantee of a financially responsible party. A loan is "in the process of collection" if collection of the loan is proceeding in due course either (1) through legal action, including judgment enforcement procedures, or, (2) in appropriate circumstances, through collection efforts not involving legal action which are reasonably expected to result in repayment of the debt or in its restoration to a current status in the near future.
	Information on nonaccrual loans as of December 31, 2014 and 2013 is presented in the following table:
	As of December 31,	2014				2013
	Commercial
	Real estate	$	2,088,000			$	2,457,000
	Construction	208,000				—
	Other	935,000				4,370,000
	Municipal	—				—
	Residential
	Term	6,421,000				8,484,000
	Construction	—				—
	Home equity line of credit	832,000				1,007,000
	Consumer	26,000				—
	Total	$	10,510,000			$	16,318,000
Information regarding impaired loans is as follows:
For the years ended December 31,	2014				2013				2012
Average investment in impaired loans	$	38,404,000			$	45,722,000			$	45,019,000
Interest income recognized on impaired loans, all on cash basis	1,465,000				1,750,000				1,039,000
As of December 31,	2014				2013
Balance of impaired loans	$	35,862,000			$	42,351,000
Less portion for which no allowance for loan losses is allocated	(26,313,000		)		(32,417,000		)
Portion of impaired loan balance for which an allowance for loan losses is allocated	$	9,549,000			$	9,934,000
Portion of allowance for loan losses allocated to the impaired loan balance	$	1,803,000			$	2,461,000
Impaired loans include restructured loans and loans placed on non-accrual. These loans are measured at the present value of expected future cash flows discounted at the loan's effective interest rate or at the fair value of the collateral if the loan is collateral dependent. If the measure of an impaired loan is lower than the recorded investment in the loan and estimated selling costs, a specific reserve is established for the difference, or, in certain situations, if the measure of an impaired loan is lower than the recorded investment in the loan and estimated selling costs, the difference is written off.
A breakdown of impaired loans by category as of December 31, 2014, is presented in the following table:
	Recorded Investment				Unpaid				Related Allowance			Average		Recognized Interest
					Principal Balance							Recorded Investment		Income
With No Related Allowance
Commercial
Real estate	$	11,687,000			$	12,423,000			$	—		$	11,080,000	$	488,000
Construction	—				—				—			30,000		—
Other	2,616,000				3,407,000				—			3,853,000		156,000
Municipal	—				—				—			—		—
Residential
Term	10,820,000				11,824,000				—			10,505,000		402,000
Construction	—				—				—			—		—
Home equity line of credit	1,164,000				1,395,000				—			1,447,000		29,000
Consumer	26,000				28,000				—			11,000		3,000
	$	26,313,000			$	29,077,000			$	—		$	26,926,000	$	1,078,000
With an Allowance Recorded
Commercial
Real estate	$	1,617,000			$	1,789,000			$	346,000		$	3,040,000	$	62,000
Construction	1,380,000				1,380,000				413,000			1,279,000		56,000
Other	326,000				338,000				129,000			1,103,000		13,000
Municipal	—				—				—			—		—
Residential
Term	5,303,000				5,513,000				519,000			5,738,000		239,000
Construction	—				—				—			—		—
Home equity line of credit	923,000				929,000				396,000			318,000		17,000
Consumer	—				—				—			—		—
	$	9,549,000			$	9,949,000			$	1,803,000		$	11,478,000	$	387,000
Total
Commercial
Real estate	$	13,304,000			$	14,212,000			$	346,000		$	14,120,000	$	550,000
Construction	1,380,000				1,380,000				413,000			1,309,000		56,000
Other	2,942,000				3,745,000				129,000			4,956,000		169,000
Municipal	—				—				—			—		—
Residential
Term	16,123,000				17,337,000				519,000			16,243,000		641,000
Construction	—				—				—			—		—
Home equity line of credit	2,087,000				2,324,000				396,000			1,765,000		46,000
Consumer	26,000				28,000				—			11,000		3,000
	$	35,862,000			$	39,026,000			$	1,803,000		$	38,404,000	$	1,465,000
Substantially all interest income recognized on impaired loans for all classes of financing receivables was recognized on a cash basis as received.
A breakdown of impaired loans by category as of December 31, 2013, is presented in the following table:
	Recorded Investment				Unpaid				Related Allowance			Average		Recognized Interest
					Principal Balance							Recorded Investment		Income
With No Related Allowance
Commercial
Real estate	$	11,813,000			$	12,419,000			$	—		$	11,100,000	$	495,000
Construction	—				—				—			202,000		—
Other	5,617,000				7,309,000				—			4,265,000		322,000
Municipal	—				—				—			—		—
Residential
Term	13,432,000				14,600,000				—			14,396,000		511,000
Construction	—				—				—			—		—
Home equity line of credit	1,555,000				1,791,000				—			1,578,000		32,000
Consumer	—				—				—			—		—
	$	32,417,000			$	36,119,000			$	—		$	31,541,000	$	1,360,000
With an Allowance Recorded
Commercial
Real estate	$	3,122,000			$	3,264,000			$	890,000		$	5,673,000	$	150,000
Construction	1,284,000				1,284,000				272,000			1,795,000		48,000
Other	1,081,000				1,132,000				841,000			1,633,000		28,000
Municipal	—				—				—			—		—
Residential
Term	4,354,000				4,516,000				404,000			4,982,000		162,000
Construction	—				—				—			—		—
Home equity line of credit	93,000				93,000				54,000			98,000		2,000
Consumer	—				—				—			—		—
	$	9,934,000			$	10,289,000			$	2,461,000		$	14,181,000	$	390,000
Total
Commercial
Real estate	$	14,935,000			$	15,683,000			$	890,000		$	16,773,000	$	645,000
Construction	1,284,000				1,284,000				272,000			1,997,000		48,000
Other	6,698,000				8,441,000				841,000			5,898,000		350,000
Municipal	—				—				—			—		—
Residential
Term	17,786,000				19,116,000				404,000			19,378,000		673,000
Construction	—				—				—			—		—
Home equity line of credit	1,648,000				1,884,000				54,000			1,676,000		34,000
Consumer	—				—				—			—		—
	$	42,351,000			$	46,408,000			$	2,461,000		$	45,722,000	$	1,750,000
A breakdown of impaired loans by category as of December 31, 2012, is presented in the following table:
	Recorded Investment				Unpaid				Related Allowance			Average		Recognized Interest
					Principal Balance							Recorded Investment		Income
With No Related Allowance
Commercial
Real estate	$	9,386,000			$	9,963,000			$	—		$	10,102,000	$	199,000
Construction	101,000				115,000				—			2,533,000		—
Other	4,737,000				5,345,000				—			2,877,000		53,000
Municipal	—				—				—			—		—
Residential
Term	12,747,000				14,440,000				—			9,801,000		189,000
Construction	—				—				—			560,000		—
Home equity line of credit	1,311,000				1,440,000				—			961,000		27,000
Consumer	—				—				—			3,000		—
	$	28,282,000			$	31,303,000			$	—		$	26,837,000	$	468,000
With an Allowance Recorded
Commercial
Real estate	$	6,388,000			$	7,018,000			$	1,523,000		$	4,614,000	$	211,000
Construction	3,253,000				3,253,000				969,000			1,816,000		85,000
Other	1,124,000				1,126,000				652,000			1,974,000		38,000
Municipal	—				—				—			—		—
Residential
Term	6,697,000				6,842,000				395,000			9,066,000		237,000
Construction	—				—				—			261,000		—
Home equity line of credit	—				—				—			442,000		—
Consumer	—				—				—			9,000		—
	$	17,462,000			$	18,239,000			$	3,539,000		$	18,182,000	$	571,000
Total
Commercial
Real estate	$	15,774,000			$	16,981,000			$	1,523,000		$	14,716,000	$	410,000
Construction	3,354,000				3,368,000				969,000			4,349,000		85,000
Other	5,861,000				6,471,000				652,000			4,851,000		91,000
Municipal	—				—				—			—		—
Residential
Term	19,444,000				21,282,000				395,000			18,867,000		426,000
Construction	—				—				—			821,000		—
Home equity line of credit	1,311,000				1,440,000				—			1,403,000		27,000
Consumer	—				—				—			12,000		—
	$	45,744,000			$	49,542,000			$	3,539,000		$	45,019,000	$	1,039,000
Troubled Debt Restructured
A TDR constitutes a restructuring of debt if the Company, for economic or legal reasons related to the borrower's financial difficulties, grants a concession to the borrower that it would not otherwise consider. To determine whether or not a loan should be classified as a TDR, Management evaluates a loan based upon the following criteria:
•	The borrower demonstrates financial difficulty; common indicators include past due status with bank obligations, substandard credit bureau reports, or an inability to refinance with another lender, and
•	The Company has granted a concession; common concession types include maturity date extension, interest rate adjustments to below market pricing, and deferment of payments.
The Company applies the same interest accrual policy to TDRs as it does for all classes of loans. As of December 31, 2014, the Company had 94 loans with a value of $27,214,000 that have been restructured. This compares to 99 loans with a value of $29,098,000 classified as TDRs as of December 31, 2013. The impairment carried as a specific reserve in the allowance for loan losses is calculated by present valuing the cashflow modification on the loan, or, for collateral-dependent loans, using the fair value of the collateral less costs to sell.
The following table shows TDRs by class and the specific reserve as of December 31, 2014:
	Number of Loans			Balance				Specific Reserves
Commercial
Real estate	19			$	12,282,000			$	267,000
Construction	1			1,172,000				207,000
Other	15			2,007,000				—
Municipal	—			—				—
Residential
Term	54			10,932,000				373,000
Construction	—			—				—
Home equity line of credit	5			821,000				21,000
Consumer	—			—				—
	94			$	27,214,000			$	868,000
The following table shows TDRs by class and the specific reserve as of December 31, 2013:
	Number of Loans			Balance				Specific Reserves
Commercial
Real estate	20			$	13,018,000			$	433,000
Construction	1			1,284,000				274,000
Other	20			2,734,000				100,000
Municipal	—			—				—
Residential
Term	53			11,220,000				210,000
Construction	—			—				—
Home equity line of credit	5			842,000				—
Consumer	—			—				—
	99			$	29,098,000			$	1,017,000
As of December 31, 2014, 12 of the loans classified as TDRs with a total balance of $1,549,000 were more than 30 days past due. Of these loans, two loans with an outstanding balance of $238,000 had been placed on TDR status in the previous 12 months. The following table shows past-due TDRs by class and the associated specific reserves included in the allowance for loan losses as of December 31, 2014:
	Number of Loans			Balance				Specific Reserves
Commercial
Real estate	1			$	321,000			$	120,000
Construction	—			—				—
Other	1			2,000				—
Municipal	—			—				—
Residential
Term	8			1,000,000				36,000
Construction	—			—				—
Home equity line of credit	2			226,000				21,000
Consumer	—			—				—
	12			$	1,549,000			$	177,000
As of December 31, 2013, 16 of the loans classified as TDRs with a total balance of $3,261,000 were more than 30 days past due. Of these loans, six loans with an outstanding balance of $810,000 had been placed on TDR status in the previous 12 months. The following table shows past-due TDRs by class and the associated specific reserves included in the allowance for loan losses as of December 31, 2013:
	Number of Loans			Balance				Specific Reserves
Commercial
Real estate	2			$	990,000			$	—
Construction	—			—				—
Other	2			355,000				—
Municipal	—			—				—
Residential
Term	10			1,688,000				37,000
Construction	—			—				—
Home equity line of credit	2			228,000				—
Consumer	—			—				—
	16			$	3,261,000			$	37,000
During the year ended December 31, 2014, six loans were placed on TDR status with a post-modification outstanding balance of $826,000. These were considered TDRs because concessions had been granted to borrowers experiencing financial difficulties. Concessions include reductions in interest rates, principal and/or interest forbearance, payment extensions, or combinations thereof.  The following table shows loans placed on TDR status during the year ended December 31, 2014, by class of loan and the associated specific reserve included in the allowance for loan losses as of December 31, 2014:
	Number of Loans			Pre-Modification				Post-Modification Outstanding			Specific Reserves
				Outstanding				Recorded
				Recorded Investment				Investment
Commercial
Real estate	2			$	302,000			$	300,000		$	—
Construction	—			—				—			—
Other	—			—				—			—
Municipal	—			—				—			—
Residential
Term	4			627,000				526,000			12,000
Construction	—			—				—			—
Home equity line of credit	—			—				—			—
Consumer	—			—				—			—
	6			$	929,000			$	826,000		$	12,000
During the year ended December 31, 2013, 10 loans were placed on TDR status with a post-modification balance of $3,604,000. These were considered to be TDRs because concessions had been granted to borrowers experiencing financial difficulties. Concessions include reductions in interest rates, principal and/or interest forbearance, payment extensions, or combinations thereof. The following table shows loans placed on TDR status in 2013 by type of loan and the associated specific reserve included in the allowance for loan losses as of December 31, 2013:
	Number of Loans			Pre-Modification				Post-Modification Outstanding			Specific Reserves
				Outstanding				Recorded
				Recorded Investment				Investment
Commercial
Real estate	2			$	1,883,000			$	1,883,000		$	—
Construction	—			—				—			—
Other	2			491,000				491,000			—
Municipal	—			—				—			—
Residential
Term	5			1,032,000				1,029,000			31,000
Construction	—			—				—			—
Home equity line of credit	1			204,000				201,000			—
Consumer	—			—				—			—
	10			$	3,610,000			$	3,604,000		$	31,000
As of December 31, 2014, Management is aware of nine loans classified as TDRs that are involved in bankruptcy with an outstanding balance of $1,215,000. As of December 31, 2014, there were 16 loans with an outstanding balance of $2,496,000 that were classified as TDRs and were on non-accrual status, five of which, with an outstanding balance of $611,000, were in the process of foreclosure.

Allowance_for_Loan_Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2014
Allowance for Loan and Lease Losses, Adjustments, Net [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses
	The Company provides for loan losses through the establishment of an allowance for loan losses which represents an estimated reserve for existing losses in the loan portfolio. A systematic methodology is used for determining the allowance that includes a quarterly review process, risk rating changes, and adjustments to the allowance. The loan portfolio is classified in eight classes and credit risk is evaluated separately in each class. The appropriate level of the allowance is evaluated continually based on a review of significant loans, with a particular emphasis on nonaccruing, past due, and other loans that may require special attention. Other factors include general conditions in local and national economies; loan portfolio composition and asset quality indicators; and internal factors such as changes in underwriting policies, credit administration practices, experience, ability and depth of lending management, among others.
	The following table summarizes the composition of the allowance for loan losses, by class of financing receivable and allowance, as of December 31, 2014 and 2013:
	As of December 31,	2014			2013
	Allowance for Loans Evaluated Individually for Impairment
	Commercial
	Real estate	$	346,000		$	890,000
	Construction	413,000			272,000
	Other	129,000			841,000
	Municipal	—			—
	Residential
	Term	519,000			404,000
	Construction	—			—
	Home equity line of credit	396,000			54,000
	Consumer	—			—
	Total	$	1,803,000		$	2,461,000
	Allowance for Loans Evaluated Collectively for Impairment
	Commercial
	Real estate	$	3,186,000		$	3,712,000
	Construction	410,000			303,000
	Other	1,376,000			1,435,000
	Municipal	15,000			15,000
	Residential
	Term	666,000			695,000
	Construction	20,000			21,000
	Home equity line of credit	664,000			621,000
	Consumer	542,000			573,000
	Unallocated	1,662,000			1,678,000
	Total	$	8,541,000		$	9,053,000
	Total Allowance for Loan Losses
	Commercial
	Real estate	$	3,532,000		$	4,602,000
	Construction	823,000			575,000
	Other	1,505,000			2,276,000
	Municipal	15,000			15,000
	Residential
	Term	1,185,000			1,099,000
	Construction	20,000			21,000
	Home equity line of credit	1,060,000			675,000
	Consumer	542,000			573,000
	Unallocated	1,662,000			1,678,000
	Total	$	10,344,000		$	11,514,000
	The allowance consists of four elements: (1) specific reserves for loans evaluated individually for impairment; (2) general reserves for each portfolio segment based on historical loan loss experience; (3) qualitative reserves judgmentally adjusted for local and national economic conditions, concentrations, portfolio composition, volume and severity of delinquencies and nonaccrual loans, trends of criticized and classified loans, changes in credit policies, and underwriting standards, credit administration practices, and other factors as applicable for each portfolio segment; and (4) unallocated reserves. All outstanding loans are considered in evaluating the appropriateness of the allowance.
	A breakdown of the allowance for loan losses as of December 31, 2014 and 2013, by class of financing receivable and allowance element, is presented in the following tables:
	As of December 31, 2014	Specific Reserves on Loans Evaluated Individually for Impairment			General Reserves on Loans Based on Historical Loss Experience		Reserves for Qualitative Factors			Unallocated Reserves			Total Reserves
	Commercial
	Real estate	$	346,000		$	1,444,000	$	1,742,000		$	—		$	3,532,000
	Construction	413,000			186,000		224,000			—			823,000
	Other	129,000			624,000		752,000			—			1,505,000
	Municipal	—			—		15,000			—			15,000
	Residential
	Term	519,000			297,000		369,000			—			1,185,000
	Construction	—			9,000		11,000			—			20,000
	Home equity line of credit	396,000			376,000		288,000			—			1,060,000
	Consumer	—			346,000		196,000			—			542,000
	Unallocated	—			—		—			1,662,000			1,662,000
		$	1,803,000		$	3,282,000	$	3,597,000		$	1,662,000		$	10,344,000
	As of December 31, 2013	Specific Reserves on Loans Evaluated Individually for Impairment			General Reserves on Loans Based on Historical Loss Experience		Reserves for Qualitative Factors			Unallocated Reserves			Total Reserves
	Commercial
	Real estate	$	890,000		$	1,927,000	$	1,785,000		$	—		$	4,602,000
	Construction	272,000			157,000		146,000			—			575,000
	Other	841,000			745,000		690,000			—			2,276,000
	Municipal	—			—		15,000			—			15,000
	Residential
Term	404,000			342,000		353,000			—			1,099,000
Construction	—			10,000		11,000			—			21,000
Home equity line of credit	54,000			343,000		278,000			—			675,000
Consumer	—			382,000		191,000			—			573,000
Unallocated	—			—		—			1,678,000			1,678,000
	$	2,461,000		$	3,906,000	$	3,469,000		$	1,678,000		$	11,514,000
Qualitative adjustment factors are taken into consideration when determining reserve estimates. These adjustment factors are based upon our evaluation of various current conditions, including those listed below.
•	General economic conditions.
•	Credit quality trends with emphasis on loan delinquencies, nonaccrual levels and classified loans.
•	Recent loss experience in particular segments of the portfolio.
•	Loan volumes and concentrations, including changes in mix.
•	Other factors, including changes in quality of the loan origination; loan policy changes; changes in credit risk management processes; Bank regulatory and external loan review examination results.
The qualitative portion of the allowance for loan losses was 0.39% of related loans as of December 31, 2014, compared to 0.40% of related loans as of December 31, 2013. The qualitative portion increased $128,000 between December 31, 2013 and December 31, 2014.
The unallocated component totaled $1,662,000 at December 31, 2014, or 16.1% of the total reserve. This compares to $1,678,000 or 14.6% as of December 31, 2013. The level of unallocated reserve and period-to-period change is based on the following considerations:
•	The unallocated reserve at December 31, 2014 was $16,000 lower than the previous year, yet slightly higher as a percentage of the total allowance. The relative dollar reduction in the unallocated was less than the overall proportionate year-over-year decline in the total allowance. Management considers this appropriate to support loan growth in 2014. Between 2010 through 2013 average loans declined year-over-year, but grew 3.0% on average from 2013 to 2014. Growth in 2014 originated from the commercial loan and home equity line-of-credit portfolios.
•	External conditions, factors specific to individual credits and collateral values may bring rise to unforeseen variations in specific reserves on impaired loans in subsequent periods. There is a risk of uncertainty and imprecision in these estimates, thereby supporting some level of unallocated for unanticipated changes.
•	An internal analysis completed on OREO property sales through December 31, 2014, found that properties sold approximately 20% below the appraised value of the property at the time of take in. Based on current and prior analyses, Management applies a 20% additional discount factor, exclusive of the estimated cost to sell, to arrive at OREO take in amounts. Deterioration in distressed sales values will affect the allowance as these potential additional write downs would be taken against the allowance. The unallocated portion provides additional funds for these adjustments.
•	From 2009 through 2013, a period of historically high loan charge-offs for the Bank, the required reserve as a percent of total loans averaged 1.33%, ranging from a low of 0.88% to a high of 1.60%, or $8.7 million to $13.9 million. The current allowance, including the unallocated portion, is in the middle of the range. Federal Reserve officials remain optimistic about the U.S economic outlook but are concerned that the prospect of slower overseas growth could dampen the recovery. Caution remains appropriate at the evaluation date regarding the direction of the economy, the uncertain impact of a slowing of growth abroad on the U.S. economy and the potential collective impact on Bank loan portfolio quality. Such uncertainties support the unallocated position.
•	In more general terms, the unallocated component is available to cover imprecision or uncertainties to incorporate the range of probable outcomes inherent in estimates used for the allowance, which may change from period to period.
The allowance for loan losses as a percent of total loans stood at 1.13% as of December 31, 2014, compared to 1.31% of
total loans as of December 31, 2013.
Commercial loans are comprised of three major classes, commercial real estate loans, commercial construction loans and other commercial loans. Commercial real estate is primarily comprised of loans to small businesses collateralized by owner-occupied real estate, while other commercial is primarily comprised of loans to small businesses collateralized by plant and equipment, commercial fishing vessels and gear, and limited inventory-based lending. Commercial real estate loans typically have a maximum loan-to-value of 75% based upon current appraisal information at the time the loan is made. Municipal loans are comprised of loans to municipalities in Maine for capitalized expenditures, construction projects or tax-anticipation notes. All municipal loans are considered general obligations of the municipality and are collateralized by the taxing ability of the municipality for repayment of debt.
Construction loans, both commercial and residential, comprise a very small portion of the portfolio, and at 31.3% of capital are well under the regulatory guidance of 100.0% of capital at December 31, 2014. Construction loans and non-owner-occupied commercial real estate loans are at 94.7% of total capital, well under regulatory guidance of 300.0% of capital at December 31, 2014.
The process of establishing the allowance with respect to the commercial loan portfolio begins when a loan officer initially assigns each loan a risk rating, using established credit criteria. Approximately 50% of the outstanding loans
and commitments are subject to review and validation annually by an independent consultant, as well as periodically by the Company's internal credit review function. The methodology employs Management's judgment as to the level of losses on existing loans based on internal review of the loan portfolio, including an analysis of a borrower's current financial position, and the consideration of current and anticipated economic conditions and their potential effects on specific borrowers and or lines of business. In determining the Company's ability to collect certain loans, Management also considers the fair value of underlying collateral. The risk rating system has eight levels, defined as follows:
1    Strong
Credits rated "1" are characterized by borrowers fully responsible for the credit with excellent capacity to pay principal and interest. Loans rated "1" may be secured with acceptable forms of liquid collateral.
2    Above Average
Credits rated "2" are characterized by borrowers that have better than average liquidity, capitalization, earnings and/or cash flow with a consistent record of solid financial performance.
3    Satisfactory
Credits rated "3" are characterized by borrowers with favorable liquidity, profitability and financial condition with adequate cash flow to pay debt service.
4    Average
Credits rated "4" are characterized by borrowers that present risk more than 1, 2 and 3 rated loans and merit an ordinary level of ongoing monitoring. Financial condition is on par or somewhat below industry averages while cash flow is generally adequate to meet debt service requirements.
5    Watch
Credits rated "5" are characterized by borrowers that warrant greater monitoring due to financial condition or unresolved and identified risk factors.
6   Other Assets Especially Mentioned (OAEM)
Loans in this category are currently protected but are potentially weak and constitute an undue and unwarranted credit risk, but not to the point of justifying a classification of substandard. OAEM have potential weaknesses which may, if not checked or corrected, weaken the asset or inadequately protect the Bank's credit position at some future date.
7    Substandard
Loans in this category are inadequately protected by the current paying capacity of the borrower or of the collateral, if any. These loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. Substandard loans are characterized by the distinct possibility that the Bank may sustain some loss if deficiencies are not corrected.
8    Doubtful
Loans classified "Doubtful" have the same weaknesses as those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, based on currently existing facts, conditions, and values, highly questionable and improbable. The possibility of loss is high, but because of certain important and reasonably specific pending factors which may work to the advantage and strengthening of the asset, its classification as an estimated loss is deferred until its more exact status may be determined.
The following table summarizes the risk ratings for the Company's commercial construction, commercial real estate, commercial other and municipal loans as of December 31, 2014:
	Commercial			Commercial		Commercial			Municipal			All Risk-
	Real Estate			Construction		Other			Loans			Rated Loans
1 Strong	$	12,000		$	—	$	330,000		$	—		$	342,000
2 Above average	12,668,000			771,000		7,210,000			18,789,000			39,438,000
3 Satisfactory	50,275,000			1,983,000		24,232,000			1,635,000			78,125,000
4 Average	108,719,000			23,345,000		44,895,000			—			176,959,000
5 Watch	36,974,000			1,567,000		18,171,000			—			56,712,000
6 OAEM	9,846,000			2,519,000		1,970,000			—			14,335,000
7 Substandard	23,817,000			747,000		7,723,000			—			32,287,000
8 Doubtful	—			—		—			—			—
Total	$	242,311,000		$	30,932,000	$	104,531,000		$	20,424,000		$	398,198,000
The following table summarizes the risk ratings for the Company's commercial construction, commercial real estate, commercial other and municipal loans as of December 31, 2013:
	Commercial			Commercial		Commercial			Municipal			All Risk-
	Real Estate			Construction		Other			Loans			Rated Loans
1 Strong	$	16,000		$	—	$	265,000		$	—		$	281,000
2 Above average	14,565,000			804,000		6,719,000			16,230,000			38,318,000
3 Satisfactory	45,213,000			871,000		14,852,000			2,887,000			63,823,000
4 Average	100,343,000			14,938,000		45,792,000			—			161,073,000
5 Watch	32,326,000			26,000		10,439,000			—			42,791,000
6 OAEM	26,102,000			2,948,000		3,238,000			—			32,288,000
7 Substandard	27,115,000			795,000		13,622,000			—			41,532,000
8 Doubtful	263,000			—		362,000			—			625,000
Total	$	245,943,000		$	20,382,000	$	95,289,000		$	19,117,000		$	380,731,000
Commercial loans are generally charged off when all or a portion of the principal amount is determined to be uncollectible. This determination is based on circumstances specific to a borrower including repayment ability, analysis of collateral and other factors as applicable.
Residential loans are comprised of two classes: term loans, which include traditional amortizing home mortgages, and construction loans, which include loans for owner-occupied residential construction. Residential loans typically have a 75% to 80% loan to value based upon current appraisal information at the time the loan is made. Home equity loans and lines of credit are typically written to the same underwriting standards. Consumer loans are primarily amortizing loans to individuals collateralized by automobiles, pleasure craft and recreation vehicles, typically with a maximum loan to value of 80% to 90% of the purchase price of the collateral. Consumer loans also include a small amount of unsecured short-term time notes to individuals.
Residential loans, consumer loans and home equity lines of credit are segregated into homogeneous pools with similar risk characteristics. Trends and current conditions are analyzed and historical loss experience is adjusted accordingly. Quantitative and qualitative adjustment factors for these segments are consistent with those for the commercial and municipal classes. Certain loans in the residential, home equity lines of credit and consumer classes identified as having the potential for further deterioration are analyzed individually to confirm impairment status, and to determine the need for a specific reserve; however, there is no formal rating system used for these classes. Consumer loans greater than 120 days past due are generally charged off. Residential loans 90 days or more past due are placed on non-accrual status unless the loans are both well secured and in the process of collection.
There were no changes to the Company's accounting policies or methodology used to estimate the allowance for loan losses during the year ended December 31, 2014. Allowance for loan losses activity for the years ended December 31, 2014, 2013 and 2012 was as follows:
For the year ended December 31, 2014	Commercial											Residential					Home Equity
	Real Estate			Construction		Other			Municipal			Term		Construction			Line of Credit		Consumer		Unallocated			Total
Allowance for loan losses:
Beginning balance	$	4,602,000		$	575,000	$	2,276,000		$	15,000		$	1,099,000	$	21,000		$	675,000	$	573,000	$	1,678,000		$	11,514,000
Chargeoffs	1,205,000			—		989,000			—			699,000		—			153,000		449,000		—			3,495,000
Recoveries	144,000			—		758,000			—			36,000		25,000			16,000		196,000		—			1,175,000
Provision (credit)	(9,000		)	248,000		(540,000		)	—			749,000		(26,000		)	522,000		222,000		(16,000		)	1,150,000
Ending balance	$	3,532,000		$	823,000	$	1,505,000		$	15,000		$	1,185,000	$	20,000		$	1,060,000	$	542,000	$	1,662,000		$	10,344,000
Ending balance specifically evaluated for impairment	$	346,000		$	413,000	$	129,000		$	—		$	519,000	$	—		$	396,000	$	—	$	—		$	1,803,000
Ending balance collectively evaluated for impairment	$	3,186,000		$	410,000	$	1,376,000		$	15,000		$	666,000	$	20,000		$	664,000	$	542,000	$	1,662,000		$	8,541,000
Related loan balances:
Ending balance	$	242,311,000		$	30,932,000	$	104,531,000		$	20,424,000		$	384,032,000	$	12,160,000		$	103,521,000	$	19,653,000	$	—		$	917,564,000
Ending balance specifically evaluated for impairment	$	13,304,000		$	1,380,000	$	2,942,000		$	—		$	16,123,000	$	—		$	2,087,000	$	26,000	$	—		$	35,862,000
Ending balance collectively evaluated for impairment	$	229,007,000		$	29,552,000	$	101,589,000		$	20,424,000		$	367,909,000	$	12,160,000		$	101,434,000	$	19,627,000	$	—		$	881,702,000
For the year ended December 31, 2013	Commercial											Residential					Home Equity
	Real Estate			Construction		Other			Municipal			Term		Construction			Line of Credit		Consumer		Unallocated			Total
Allowance for loan losses:
Beginning balance	$	5,865,000		$	1,359,000	$	2,050,000		$	18,000		$	1,109,000	$	11,000		$	654,000	$	592,000	$	842,000		$	12,500,000
Chargeoffs	150,000			963,000		2,583,000			—			1,118,000		—			611,000		430,000		—			5,855,000
Recoveries	—			—		359,000			—			103,000		—			24,000		183,000		—			669,000
Provision (credit)	(1,113,000		)	179,000		2,450,000			(3,000		)	1,005,000		10,000			608,000		228,000		836,000			4,200,000
Ending balance	$	4,602,000		$	575,000	$	2,276,000		$	15,000		$	1,099,000	$	21,000		$	675,000	$	573,000	$	1,678,000		$	11,514,000
Ending balance specifically evaluated for impairment	$	890,000		$	272,000	$	841,000		$	—		$	404,000	$	—		$	54,000	$	—	$	—		$	2,461,000
Ending balance collectively evaluated for impairment	$	3,712,000		$	303,000	$	1,435,000		$	15,000		$	695,000	$	21,000		$	621,000	$	573,000	$	1,678,000		$	9,053,000
Related loan balances:
Ending balance	$	245,943,000		$	20,382,000	$	95,289,000		$	19,117,000		$	377,218,000	$	11,803,000		$	91,549,000	$	15,066,000	$	—		$	876,367,000
Ending balance specifically evaluated for impairment	$	14,935,000		$	1,284,000	$	6,698,000		$	—		$	17,786,000	$	—		$	1,648,000	$	—	$	—		$	42,351,000
Ending balance collectively evaluated for impairment	$	231,008,000		$	19,098,000	$	88,591,000		$	19,117,000		$	359,432,000	$	11,803,000		$	89,901,000	$	15,066,000	$	—		$	834,016,000
For the year ended December 31, 2012	Commercial											Residential					Home Equity
	Real Estate			Construction		Other			Municipal			Term		Construction			Line of Credit		Consumer		Unallocated			Total
Allowance for loan losses:
Beginning balance	$	5,659,000		$	658,000	$	2,063,000		$	19,000		$	1,159,000	$	255,000		$	595,000	$	584,000	$	2,008,000		$	13,000,000
Chargeoffs	1,394,000			928,000		3,215,000			—			1,911,000		389,000			688,000		555,000		—			9,080,000
Recoveries	13,000			246,000		113,000			—			110,000		54,000			1,000		208,000		—			745,000
Provision (credit)	1,587,000			1,383,000		3,089,000			(1,000		)	1,751,000		91,000			746,000		355,000		(1,166,000		)	7,835,000
Ending balance	$	5,865,000		$	1,359,000	$	2,050,000		$	18,000		$	1,109,000	$	11,000		$	654,000	$	592,000	$	842,000		$	12,500,000
Ending balance specifically evaluated for impairment	$	1,523,000		$	969,000	$	652,000		$	—		$	395,000	$	—		$	—	$	—	$	—		$	3,539,000
Ending balance collectively evaluated for impairment	$	4,342,000		$	390,000	$	1,398,000		$	18,000		$	714,000	$	11,000		$	654,000	$	592,000	$	842,000		$	8,961,000
Related loan balances:
Ending balance	$	251,335,000		$	22,417,000	$	81,183,000		$	14,704,000		$	379,447,000	$	6,459,000		$	99,082,000	$	14,657,000	$	—		$	869,284,000
Ending balance specifically evaluated for impairment	$	15,774,000		$	3,354,000	$	5,861,000		$	—		$	19,444,000	$	—		$	1,311,000	$	—	$	—		$	45,744,000
Ending balance collectively evaluated for impairment	$	235,561,000		$	19,063,000	$	75,322,000		$	14,704,000		$	360,003,000	$	6,459,000		$	97,771,000	$	14,657,000	$	—		$	823,540,000

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment
	Premises and equipment are carried at cost and consist of the following:
	As of December 31,	2014		2013
	Land	$	4,532,000	$	4,532,000
	Land improvements	821,000		799,000
	Buildings	20,481,000		19,668,000
	Equipment	10,610,000		12,196,000
		36,444,000		37,195,000
	Less accumulated depreciation	13,825,000		13,579,000
		$	22,619,000	$	23,616,000
	Based on current contractual agreements (leases), Management anticipates rental revenue over the next 5 years to be $128,000 in 2015, $79,000 in 2016, $57,000 in 2017, $13,000 in 2018 and $4,000 in 2019.

Other_Real_Estate_Owned

Other Real Estate Owned	12 Months Ended
	Dec. 31, 2014
Real Estate Owned, Disclosure of Detailed Components [Abstract]
Other Real Estate Owned	Other Real Estate Owned
	The following summarizes other real estate owned:
	As of  December 31,	2014			2013
	Real estate acquired in settlement of loans	$	3,785,000		$	4,807,000
	Changes in the allowance for losses from other real estate owned were as follows:
	For the years ended December 31,	2014			2013			2012
	Balance at beginning of year	$	330,000		$	373,000		$	436,000
	Losses charged to allowance	(313,000		)	(544,000		)	(460,000		)
	Provision charged to operating expenses	637,000			501,000			397,000
	Balance at end of year	$	654,000		$	330,000		$	373,000

Acquisitions_and_Intangible_As

Acquisitions and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions and Intangible Assets	Acquisitions and Intangible Assets
	On October 26, 2012, the Bank completed the purchase of a branch at 63 Union Street in Rockland, Maine, from Camden National Bank that was formerly operated by Bank of America. As part of the transaction, the Bank acquired approximately $32,300,000 in deposits as well as a small volume of loans.
	The purchase premium of $2,553,000 was allocated to assets acquired and liabilities assumed based on estimates of fair value at the date of acquisition. The fair value of the deposit accounts assumed was compared to the carrying amounts received and the difference of $432,000 was recorded as core deposit intangible. The core deposit intangible is subject to amortization over the estimated ten-year average life of the acquired core deposit base and will be evaluated for impairment periodically.
	The excess of the purchase price over the fair value of the assets acquired, liabilities assumed, and the amount allocated for core deposit intangible totaled $2,121,000 and was recorded as goodwill. The goodwill is not amortizable for GAAP but is amortizable for tax purposes.
	On January 14, 2005, the Company acquired FNB Bankshares ("FNB") of Bar Harbor, Maine, and its subsidiary, The First National Bank of Bar Harbor. The total value of the transaction was $47,955,000, and all of the voting equity interest of FNB was acquired in the transaction. The transaction was accounted for as a purchase and the excess of purchase price over the fair value of net identifiable assets acquired equaled $27,559,000 and was recorded as goodwill, none of which was deductible for tax purposes. The portion of the purchase price related to the core deposit intangible is being amortized over its expected economic life.
	Goodwill is evaluated annually for possible impairment under the provisions of FASB ASC Topic 350, "Intangibles – Goodwill and Other".  As of December 31, 2014, in accordance with Topic 350, the Company completed its annual review of goodwill and determined there has been no impairment. The Bank also carries $125,000 in goodwill for a de minimus transaction in 2001.
	As of December 31, 2014, the amortization expense related to the core deposit intangibles, absent any future impairment, is expected to be as follows:
	2015	$	57,000
	2016	43,000
	2017	43,000
	2018	43,000
	2019	43,000
	Thereafter	131,000
	Total	$	360,000

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The current and deferred components of income tax expense (benefit) were as follows:
	For the years ended December 31,	2014			2013			2012
	Federal income tax
	Current	$	4,282,000		$	3,234,000		$	3,239,000
	Deferred	18,000			(56,000		)	(108,000		)
		4,300,000			3,178,000			3,131,000
	State franchise tax	266,000			247,000			240,000
		$	4,566,000		$	3,425,000		$	3,371,000
	The actual tax expense differs from the expected tax expense (computed by applying the applicable U.S. Federal corporate income tax rate to income before income taxes) as follows:
	For the years ended December 31,	2014			2013			2012
	Expected tax expense	$	6,746,000		$	5,736,000		$	5,621,000
	Non-taxable income	(2,292,000		)	(2,326,000		)	(2,096,000		)
	State franchise tax, net of federal tax benefit	173,000			160,000			156,000
	Tax credits	(414,000		)	(414,000		)	(414,000		)
	Other	353,000			269,000			104,000
		$	4,566,000		$	3,425,000		$	3,371,000
	Deferred tax assets and liabilities are classified in other assets and other liabilities in the consolidated balance sheets. No valuation allowance is deemed necessary for the deferred tax asset. Items that give rise to the deferred income tax assets and liabilities and the tax effect of each at December 31, 2014 and 2013 are as follows:
		2014			2013
	Allowance for loan losses	$	3,620,000		$	4,030,000
	OREO	229,000			116,000
	Accrued pension and post-retirement	1,725,000			1,334,000
	Unrealized loss on securities available for sale	—			3,549,000
	Goodwill	138,000			206,000
	Unrealized loss on securities transferred from available for sale to held to maturity	26,000			—
	Tax credits, carried forward	—			539,000
	Restricted stock grants	264,000			113,000
	Core deposit intangible	5,000			—
	Other assets	48,000			50,000
	Total deferred tax asset	6,055,000			9,937,000
	Net deferred loan costs	(1,120,000		)	(884,000		)
	Depreciation	(2,131,000		)	(2,672,000		)
	Unrealized gain on securities available for sale	(1,358,000		)	—
	Mortgage servicing rights	(380,000		)	(405,000		)
	Core deposit intangible	—			(99,000		)
	Investment in flow through entities	(387,000		)	(361,000		)
	Prepaid expense	(210,000		)	(316,000		)
	Total deferred tax liability	(5,586,000		)	(4,737,000		)
	Net deferred tax asset	$	469,000		$	5,200,000
	At December 31, 2014, the Company held investments in two limited partnerships with related New Market Tax Credits. These investments are carried at cost and amortized on the effective yield method. The tax credits from these investments are estimated at $636,000 for each of the years ended December 31, 2014 and 2013, and are recorded as a reduction of income tax expense. Amortization of the investments in the limited partnerships totaled $569,000 and $520,000 for the years ended December 31, 2014 and 2013, respectively, and is recognized as a component of income tax expense in the consolidated statements of income. The carrying value of these investments was $457,000 and $1,026,000 at December 31, 2014 and 2013, respectively, and is recorded in other assets. The Company's total exposure to these limited partnerships was $3,957,000 and $4,526,000, at December 31, 2014 and 2013, respectively, which is comprised of the Company's equity investment in the limited partnerships and the balance of a participated loan receivable.
	FASB ASC Topic 740, "Income Taxes," defines the criteria that an individual tax position must satisfy for some or all of the benefits of that position to be recognized in a company's financial statements. Topic 740 prescribes a recognition threshold of more-likely-than-not, and a measurement attribute for all tax positions taken or expected to be taken on a tax return, in order for those tax positions to be recognized in the financial statements. The Company is currently open to audit under the statute of limitations by the Internal Revenue Service for the years ended December 31, 2010 through 2013.

Certificates_of_Deposit

Certificates of Deposit	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Certificates of Deposit	Certificates of Deposit
	The following table represents the breakdown of certificates of deposit at December 31, 2014 and 2013:
		December 31, 2014		December 31, 2013
	Certificates of deposit < $100,000	$	184,471,000	$	210,321,000
	Certificates $100,000 to $250,000	221,892,000		278,674,000
	Certificates $250,000 and over	41,138,000		42,124,000
		$	447,501,000	$	531,119,000
	At December 31, 2014, the scheduled maturities of certificates of deposit are as follows:
	Year of Maturity	Less than $100,000		$100,000 and Greater		All Certificates of Deposit
	2015	$	134,198,000	$	206,251,000	$	340,449,000
	2016	19,757,000		15,565,000		35,322,000
	2017	8,261,000		8,173,000		16,434,000
	2018	7,476,000		14,160,000		21,636,000
	2019	14,514,000		18,376,000		32,890,000
	2020 and thereafter	265,000		505,000		770,000
		$	184,471,000	$	263,030,000	$	447,501,000
	Interest on certificates of deposit of $100,000 or more was $2,823,000, $3,280,000, and $3,358,000 in 2014, 2013 and 2012, respectively.

Borrowed_Funds

Borrowed Funds	12 Months Ended
	Dec. 31, 2014
Borrowed Funds [Abstract]
Borrowed Funds	Borrowed Funds
	Borrowed funds consist of advances from the Federal Home Loan Bank of Boston (FHLB) and securities sold under agreements to repurchase with municipal and commercial customers. Pursuant to collateral agreements, FHLB advances are collateralized by all stock in FHLB, qualifying first mortgage loans, U.S. Government and Agency securities not pledged to others, and funds on deposit with FHLB. As of December 31, 2014, the Bank's total FHLB borrowing capacity, based on its holding of FHLB stock, was $232,000,000 of which $26,800,000 was unused and available for additional borrowings. All FHLB advances as of December 31, 2014, had fixed rates of interest until their respective maturity dates. Securities sold under agreements to repurchase include U.S. agencies securities and other securities. Repurchase agreements have maturity dates ranging from one to 365 days. The Bank also has in place $48,000,000 in credit lines with correspondent banks and a credit facility of $92,000,000 with the Federal Reserve Bank of Boston using commercial and home equity loans as collateral which are currently not in use.
	Borrowed funds at December 31, 2014 and 2013 have the following range of interest rates and maturity dates:
	As of December 31, 2014
	Federal Home Loan Bank Advances
	2015	0.22% - 2.98%	$	115,050,000
	2016	2.36% - 2.44%	30,000,000
	2017	0.99% - 3.69%	30,000,000
	2018	2.25% - 3.25%	30,000,000
	2019	0.00%	—
	2020 and thereafter	0.00%	141,000
			205,191,000
	Repurchase agreements
	Municipal and commercial customers	0.20% - 1.89%	74,725,000
			$	279,916,000
	As of December 31, 2013
	Federal Home Loan Bank Advances
	2014	0.28%-3.20%	$	54,500,000
	2015	2.03%-2.98%	40,000,000
	2016	2.36%-2.44%	30,000,000
	2017	0.99%-3.69%	30,000,000
	2018	2.25%-3.25%	30,000,000
	2019 and thereafter	0.00%	148,000
			184,648,000
	Repurchase agreements
	Municipal and commercial customers	0.20%-1.89%	94,477,000
			$	279,125,000

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2014
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans
	401(k) Plan
	The Bank has a defined contribution plan available to substantially all employees who have completed three months of service. Employees may contribute up to IRS-determined limits and the Bank may provide a match to employee contributions not to exceed 3.0% of compensation depending on contribution level. Subject to a vote of the Board of Directors, the Bank may also make a profit-sharing contribution to the Plan. Such contribution equaled 2.0% of each eligible employee's compensation in 2014, 2013, and 2012. The expense related to the 401(k) plan was $454,000, $414,000, and $363,000 in 2014, 2013, and 2012, respectively.
	Deferred Compensation and Supplemental Retirement Plan
	The Bank also provides unfunded, non-qualified deferred compensation payable over two years, as well as unfunded supplemental retirement benefits for certain officers, payable in installments over 20 years upon retirement or death. The agreements consist of individual contracts with differing characteristics that, when taken together, do not constitute a post-retirement plan. The costs for these benefits are recognized over the service periods of the participating officers in accordance with FASB ASC Topic 712, "Compensation – Nonretirement Postemployment Benefits". The expense of these supplemental plans was $722,000 in 2014, $309,000 in 2013, and $289,000 in 2012. As of December 31, 2014 and 2013, the accrued liability of these plans was $2,999,000 and $2,333,000, respectively, and is recorded in other liabilities.
	Post-Retirement Benefit Plans
	The Bank sponsors two post-retirement benefit plans. One plan currently provides a subsidy for health insurance premiums to certain retired employees and a future subsidy for seven active employees who were age 50 and over in 1996. These subsidies are based on years of service and range between $40 and $1,200 per month per person. The Bank also provides health insurance for retired directors. The other plan provides life insurance coverage to certain retired employees. None of these plans are pre-funded.
	The Company utilizes FASB ASC Topic 712, "Compensation – Nonretirement Postemployment Benefits", to recognize the overfunded or underfunded status of defined benefit post-retirement plans (other than a multiemployer plan) as an asset or liability in its balance sheet and to recognize changes in the funded status in the year in which the changes occur through comprehensive income (loss) of a business entity.
	The following table sets forth the accumulated postretirement benefit obligation and funded status:
	At December 31,	2014			2013			2012
	Change in benefit obligations
	Benefit obligation at beginning of year:	$	1,479,000		$	1,954,000		$	1,848,000
	Service cost	—			21,000			16,000
	Interest cost	71,000			86,000			107,000
	Benefits paid	(100,000		)	(107,000		)	(103,000		)
	Actuarial (gain) loss	478,000			(475,000		)	86,000
	Benefit obligation at end of year:	$	1,928,000		$	1,479,000		$	1,954,000
	Funded status
	Benefit obligation at end of year	$	(1,928,000	)	$	(1,479,000	)	$	(1,954,000	)
	Unamortized (gain) loss	192,000			(289,000		)	186,000
	Unrecognized transition obligation	—			—			5,000
	Accrued benefit cost	$	(1,736,000	)	$	(1,768,000	)	$	(1,763,000	)
	Weighted average discount rate as of December 31	4.25		%	5		%	4.5		%
	The following table sets forth the net periodic pension cost:
	For the years ended December 31,	2014			2013			2012
	Components of net periodic benefit cost
	Service cost	$	—		$	21,000		$	16,000
	Interest cost	71,000			86,000			107,000
	Amortization of unrecognized transition obligation	—			5,000			29,000
	Amortization of gain	(12,000		)	—			—
	Other settlement expense	10,000			—			—
	Net periodic benefit cost	$	69,000		$	112,000		$	152,000
	Weighted average discount rate for net periodic cost	5		%	4.5		%	6.5		%
	The measurement date for benefit obligations was as of year-end for all years presented. The estimated amount of benefits to be paid in 2015 is $120,000. For years ending 2016 through 2019, the estimated amount of benefits to be paid is $121,000, $122,000, $123,000 and $123,000 respectively, and the total estimated amount of benefits to be paid for years ended 2020 through 2024 is $590,000. Plan expense for 2015 is estimated to be $80,000.
	In accordance with FASB ASC Topic 715, "Compensation – Retirement Benefits", amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income (loss) are as follows:
	At December 31,	2014			2013			Portion to Be Recognized in
								Income in 2015
	Unamortized net actuarial gain (loss)	$	(192,000	)	$	289,000		$	—
	Deferred tax benefit (expense) at 35%	67,000			(101,000		)	—
	Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss)	$	(125,000	)	$	188,000		$	—

Other_Comprehensive_Income_Los

Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss)
	The following table summarizes activity in the unrealized gain or loss on available for sale securities included in other comprehensive income (loss) for the years ended December 31, 2014, 2013 and 2012.
	For the years ended December 31,	2014				2013				2012
	Balance at beginning of year	$	(6,591,000	)		$	7,940,000			$	7,401,000
	Unrealized gains (losses) arising during the period	15,175,000				(21,268,000		)		2,797,000
	Realized gains during the period	(1,155,000		)		(1,087,000		)		(1,968,000		)
	Related deferred taxes	(4,907,000		)		7,824,000				(290,000		)
	Net change	9,113,000				(14,531,000		)		539,000
	Balance at end of year	$	2,522,000			$	(6,591,000	)		$	7,940,000
	The following table summarizes activity in the unrealized loss on securities transferred from available for sale to held to maturity included in other comprehensive income (loss) for the years ended December 31, 2014, 2013, and 2012.
	For the years ended December 31,	2014			2013			2012
	Balance at beginning of period	$	—		$	—		$	—
	Net unrealized losses transferred during the period	(23,000		)	—			—
	Amortization of net unrealized losses	(51,000		)	—			—
	Related deferred taxes	26,000			—			—
	Net change	(48,000		)	—			—
	Balance at end of period	$	(48,000	)	$	—		$	—
	The following table summarizes activity in the unrealized gain or loss on postretirement benefits included in other comprehensive income (loss) for the years ended December 31, 2014, 2013, and 2012:
	For the years ended December 31,	2014				2013				2012
	Unrecognized postretirement benefits  at beginning of period	$	188,000			$	(123,000	)		$	(87,000	)
	Amortization of unrecognized transition obligation	—				5,000				29,000
	Change in unamortized net actuarial gain (loss)	(481,000		)		475,000				(86,000		)
	Related deferred taxes	168,000				(169,000		)		21,000
	Unrecognized postretirement benefits at end of period	$	(125,000	)		$	188,000			$	(123,000	)
	The reclassification of unrecognized transition obligation and accumulated losses is a component of net periodic benefit cost (see Note 13) and the income tax effect is included in the income tax expense line of the consolidated statements of income and comprehensive income (loss).

Preferred_and_Common_Stock

Preferred and Common Stock	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Preferred and Common Stock	Preferred and Common Stock
	Preferred Stock
	On January 9, 2009, the Company issued $25,000,000 in Fixed Rate Cumulative Perpetual Preferred Stock, Series A, having a liquidation preference of $1,000 per share, to the U.S. Treasury under the Capital Purchase Program ("the CPP Shares"). The CPP Shares called for cumulative dividends at a rate of 5.0% per year for the first 5 years, and at a rate of 9.0% per year in following years, payable quarterly in arrears on February 15, May 15, August 15 and November 15 of each year.
	On August 24, 2011, the Company repurchased $12,500,000 of the CPP Shares. Almost all of the repayment was made from retained earnings accumulated since the preferred stock was issued in 2009. On March 27, 2013, the Company
	repurchased $2,500,000 of the CPP Shares with funds from its operating account. On May 8, 2013, the Company repurchased
	the remaining $10,000,000 of the CPP Shares using proceeds from the Company's common stock offering in the first quarter of 2013, All the repurchase transactions were approved by the Federal Reserve Bank of Boston, the Company's primary regulator.
	Incident to such issuance, the Company issued to the U.S. Treasury warrants (the "Warrants") to purchase up to 225,904 shares of the Company's common stock at a price per share of $16.60 (subject to adjustment). The Warrants (and any shares of common stock issuable pursuant to the Warrants) are freely transferable by Treasury to third parties and the Company has filed a registration statement with the Securities and Exchange Commission to allow for possible resale of such securities.
	The Warrants have a term of ten years and could be exercised by Treasury or a subsequent holder at any time or from time to time during their term. To the extent they had not previously been exercised, the Warrants would expire after 10 years. Treasury will not vote any shares of common stock it receives upon exercise of the Warrants, but that restriction would not apply to third parties to whom Treasury transferred the Warrants. The Warrants (and any common stock issued upon exercise of the Warrants) could be transferred to third parties separately from the CPP Shares. The proceeds from the sale of the CPP Shares were allocated between the CPP Shares and Warrants based on their relative fair values on the issue date. The fair value of the Warrants was determined using the Black-Scholes model which includes the following assumptions: common stock price of $16.60 per share, dividend yield of 4.70%, stock price volatility of 24.43%, and a risk-free interest rate of 2.01%. The discount on the CPP Shares was based on the value that was allocated to the Warrants upon issuance, and was accreted back to the value of the CPP Shares over a five-year period (the expected life of the shares upon issuance) on a straight-line basis. The Warrants were unchanged as a result of the CPP Shares repurchase transaction and remain outstanding.
	Common Stock
	The Company has reserved 700,000 shares of its common stock to be made available to directors and employees who elect to participate in the stock purchase or savings and investment plans. As of December 31, 2014, 548,434 shares had been issued pursuant to these plans, leaving 151,566 shares available for future use. The issuance price is based on the market price of the stock at issuance date. Sales of stock to directors and employees amounted to 14,638 shares in 2014, 11,385 shares in 2013, and 12,451 shares in 2012.
	In 2001, the Company established a dividend reinvestment plan to allow shareholders to use their cash dividends for the automatic purchase of shares in the Company. When the plan was established, 600,000 shares were registered with the Securities and Exchange Commission, and as of December 31, 2014, 225,274 shares have been issued, leaving 374,726 shares for future use. Participation in this plan is optional and at the individual discretion of each Shareholder. Shares are purchased for the plan from the Company at a price per share equal to the average of the daily bid and asked prices reported on the NASDAQ System for the five trading days immediately preceding, but not including, the dividend payment date. Sales of stock under the Dividend Reinvestment Plan amounted to 12,686 shares in 2014, 12,008 shares in 2013, and 14,056 shares in 2012.
	On March 28, 2013, the Company consummated a fully underwritten offering for 760,771 shares of the Company's common stock, with net proceeds of $11,649,000. The Company used these proceeds to repurchase the remaining $10,000,000 of CPP Shares on May 8, 2013. Issuance of common stock for plans totaled $457,000 and $324,000 for the years ended December 31, 2014 and 2013, respectively.

Stock_Options_and_StockBased_C

Stock Options and Stock-Based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Options and Stock-Based Compensation	Stock Options and Stock-Based Compensation
	At the 2010 Annual Meeting, shareholders approved the 2010 Equity Incentive Plan (the "2010 Plan"). This reserves 400,000 shares of common stock for issuance in connection with stock options, restricted stock awards and other equity based awards to attract and retain the best available personnel, provide additional incentive to officers, employees and non-employee Directors and promote the success of our business. Such grants and awards will be structured in a manner that does not encourage the recipients to expose the Company to undue or inappropriate risk. Options issued under the 2010 Plan will qualify for treatment as incentive stock options for purposes of Section 422 of the Internal Revenue Code. Other compensation under the 2010 Plan will qualify as performance-based for purposes of Section 162(m) of the Internal Revenue Code, and will satisfy NASDAQ guidelines relating to equity compensation.
	As of December 31, 2014, 72,684 shares of restricted stock had been granted under the 2010 Plan, as detailed in the following table:
	Year	Vesting Term	Shares	Remaining Term
	Granted	(In Years)		(In Years)
	2011	4	1,500	0.1
	2011	5	5,500	1.1
	2012	3	2,027	0.2
	2012	4	2,704	1.2
	2012	5	7,996	2.2
	2013	2	8,530	0.1
	2013	3	3,808	1.1
	2013	5	14,776	3.1
	2014	1	5,086	0.1
	2014	2	10,335	1
	2014	5	10,422	4
			72,684	1.9
	The compensation cost related to these restricted stock grants was $1,178,000 and will be recognized over the vesting terms of each grant. In 2014, $431,000 of expense was recognized for these restricted shares, leaving $412,000 in unrecognized expense as of December 31, 2014. In 2013, $214,000 of expense was recognized for restricted shares, leaving $433,000 in unrecognized expense as of December 31, 2013.
	The Company established a shareholder-approved stock option plan in 1995 (the "1995 Plan"), under which the Company granted options to employees for 600,000 shares of common stock. Only incentive stock options were granted under the 1995 Plan. The option price of each option grant was determined by the Options Committee of the Board of Directors, and in no instance was less than the fair market value on the date of the grant. An option's maximum term was ten years from the date of grant, with 50% of the options granted vesting two years from the date of grant and the remaining 50% vesting five years from the date of grant. As of January 16, 2005, all options under the 1995 Plan had been granted.
	The Company applies the fair value recognition provisions of FASB ASC Topic 718, "Compensation – Stock Compensation", to stock-based employee compensation. As of December 31, 2014, all outstanding options were fully vested and all compensation cost for options had been recognized. A summary of the status of outstanding stock options as of December 31, 2014 and changes during the year then ended, is presented below.
		Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (In years)	Aggregate Intrinsic
							Value
	Outstanding at December 31, 2013	42,000		$	18
	Granted in 2014	—		—
	Exercised in 2014	—		—			—
	Forfeited in 2014	—		—
	Outstanding at December 31, 2014	42,000		$	18	0.1	—
	Exercisable at December 31, 2014	42,000		$	18	0.1	—

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share
	The following table provides detail for basic earnings per share (EPS) and diluted earnings per share for the years ended December 31, 2014, 2013 and 2012:
		Income			Shares	Per-Share
		(Numerator)			(Denominator)	Amount
	For the year ended December 31, 2014
	Net income as reported	$	14,709,000
	Less dividends and amortization of premium on preferred stock	—
	Basic EPS: Income available to common shareholders	14,709,000			10,638,527	$	1.38
	Effect of dilutive securities: warrants and restricted stock				72,337
	Diluted EPS: Income available to common shareholders plus assumed conversions	$	14,709,000		10,710,864	$	1.37
	For the year ended December 31, 2013
	Net income as reported	$	12,965,000
	Less dividends and amortization of premium on preferred stock	384,000
	Basic EPS: Income available to common shareholders	12,581,000			10,469,446	$	1.2
	Effect of dilutive securities: warrants and restricted stock				51,609
	Diluted EPS: Income available to common shareholders plus assumed conversions	$	12,581,000		10,521,055	$	1.2
	For the year ended December 31, 2012
	Net income as reported	$	12,688,000
	Less dividends and amortization of premium on preferred stock	723,000
	Basic EPS: Income available to common shareholders	11,965,000			9,828,925	$	1.22
	Effect of dilutive securities: restricted stock				17,606
	Diluted EPS: Income available to common shareholders plus assumed conversions	$	11,965,000		9,846,531	$	1.22
	All earnings per share calculations have been made using the weighted average number of shares outstanding during the period. The dilutive securities are incentive stock options granted to certain key members of Management and warrants granted to the U.S. Treasury under the Capital Purchase Program. The dilutive number of shares has been calculated using the treasury method, assuming that all granted options and warrants were exercisable at the end of each period.
	The following table presents the number of options and warrants outstanding as of December 31, 2014, 2013 and 2012 and the amount which are above or below the strike price:
		Outstanding		In-the-Money	Out-of-the-Money
	As of December 31, 2014
	Incentive stock options	42,000		—	42,000
	Warrants issued to U.S. Treasury	225,904		225,904	—
	Total dilutive securities	267,904		225,904	42,000
	As of December 31, 2013
	Incentive stock options	42,000		—	42,000
	Warrants issued to U.S. Treasury	225,904		225,904	—
	Total dilutive securities	267,904		225,904	42,000
	As of December 31, 2012
	Incentive stock options	42,000		—	42,000
	Warrants issued to U.S. Treasury	225,904		—	225,904
	Total dilutive securities	267,904		—	267,904

Regulatory_Capital_Requirement

Regulatory Capital Requirements	12 Months Ended
	Dec. 31, 2014
Regulatory Capital Requirements [Abstract]
Regulatory Capital Requirements	Regulatory Capital Requirements
	The ability of the Company to pay cash dividends to its shareholders depends primarily on receipt of dividends from its subsidiary, the Bank. The subsidiary may pay dividends to its parent out of so much of its net income as the Bank's directors deem appropriate, subject to the limitation that the total of all dividends declared by the Bank in any calendar year may not exceed the total of its net income of that year combined with its retained net income of the preceding two years and subject to minimum regulatory capital requirements. The amount available for dividends in 2015 will be 2015 earnings plus retained earnings of $12,326,000 from 2014 and 2013.
	The payment of dividends by the Company is also affected by various regulatory requirements and policies, such as the requirements to maintain adequate capital. In addition, if, in the opinion of the applicable regulatory authority, a bank under its jurisdiction is engaged in or is about to engage in an unsafe or unsound practice (which, depending on the financial condition of the bank, could include the payment of dividends), that authority may require, after notice and hearing, that such bank cease and desist from that practice. The Federal Reserve Bank and the Comptroller of the Currency have each indicated that paying dividends that deplete a bank's capital base to an inadequate level would be an unsafe and unsound banking practice. The Federal Reserve Bank, the Comptroller and the Federal Deposit Insurance Corporation have issued policy statements which provide that bank holding companies and insured banks should generally only pay dividends out of current operating earnings.
	In addition to the effect on the payment of dividends, failure to meet minimum capital requirements can also result in mandatory and discretionary actions by regulators that, if undertaken, could have an impact on the Company's operations. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measurements of the Bank's assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The Bank's capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.
	Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios set forth in the table below of Tier 1 capital and Tier 2 or total capital to risk-weighted assets and of Tier 1 capital to average assets. Management believes, as of December 31, 2014, that the Bank meets all capital adequacy requirements to which it is subject.
	As of December 31, 2014, the most recent notification from the Office of the Comptroller of the Currency classified the Bank as well-capitalized under the regulatory framework for prompt corrective action. To be categorized as well-capitalized, the Bank must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the table. There are no conditions or events since this notification that Management believes have changed the institution's category.
	The actual and minimum capital amounts and ratios for the Bank are presented in the following table:
		Actual			For capital			To be well-capitalized
					adequacy			under prompt corrective
					purposes			action provisions
	As of December 31, 2014
	Tier 2 capital to	$	137,818,000		$	68,524,000		$	85,655,000
	risk-weighted assets	16.09		%	8		%	10		%
	Tier 1 capital to	$	127,374,000		$	34,262,000		$	51,393,000
	risk-weighted assets	14.87		%	4		%	6		%
	Tier 1 capital to	$	127,374,000		$	58,086,000		$	72,607,000
	average assets	8.77		%	4		%	5		%
	As of December 31, 2013
	Tier 2 capital to	$	131,146,000		$	65,996,000		$	82,495,000
	risk-weighted assets	15.9		%	8		%	10		%
	Tier 1 capital to	$	120,819,000		$	32,998,000		$	49,497,000
	risk-weighted assets	14.65		%	4		%	6		%
	Tier 1 capital to	$	120,819,000		$	57,203,000		$	71,504,000
	average assets	8.45		%	4		%	5		%
	The actual and minimum capital amounts and ratios for the Company, on a consolidated basis, are presented in the following table:
		Actual			For capital			To be well-capitalized
					adequacy			under prompt corrective
					purposes			action provisions
	As of December 31, 2014
	Tier 2 capital to	$	139,414,000		$	68,532,000		n/a
	risk-weighted assets	16.27		%	8		%	n/a
	Tier 1 capital to	$	128,970,000		$	34,266,000		n/a
	risk-weighted assets	15.06		%	4		%	n/a
	Tier 1 capital to	$	128,970,000		$	58,066,000		n/a
	average assets	8.88		%	4		%	n/a
	As of December 31, 2013
	Tier 2 capital to	$	132,294,000		$	66,005,000		n/a
	risk-weighted assets	16.03		%	8		%	n/a
	Tier 1 capital to	$	121,967,000		$	33,002,000		n/a
	risk-weighted assets	14.78		%	4		%	n/a
	Tier 1 capital to	$	121,967,000		$	56,280,000		n/a
	average assets	8.67		%	4		%	n/a

OffBalanceSheet_Financial_Inst

Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk	Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk
	The Bank is party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to originate loans, commitments for unused lines of credit, and standby letters of credit. The instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the consolidated balance sheets. The contract amounts of those instruments reflect the extent of involvement the Bank has in particular classes of financial instruments.
	Commitments for unused lines are agreements to lend to a customer provided there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Bank upon extension of credit, is based on Management's credit evaluation of the borrower. The Bank did not incur any losses on its commitments in 2014, 2013 or 2012.
	Standby letters of credit are conditional commitments issued by the Bank to guarantee a customer's performance to a third party, with the customer being obligated to repay (with interest) any amounts paid out by the Bank under the letter of credit. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers.
	The Bank's exposure to credit loss in the event of nonperformance by the other party to the financial instrument for loan commitments and standby letters of credit is represented by the contractual amount of those instruments.
	The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments.
	At December 31, 2014 and 2013, the Bank had the following off-balance-sheet financial instruments, whose contract amounts represent credit risk:
	As of December 31,	2014		2013
	Unused lines, collateralized by residential real estate	$	65,264,000	$	58,265,000
	Other unused commitments	49,608,000		48,646,000
	Standby letters of credit	4,480,000		4,086,000
	Commitments to extend credit	13,593,000		7,224,000
	Total	$	132,945,000	$	118,221,000
	The Bank grants residential, commercial and consumer loans to customers principally located in the Mid-Coast and Down East regions of Maine. Collateral on these loans typically consists of residential or commercial real estate, or personal property. Although the loan portfolio is diversified, a substantial portion of borrowers' ability to honor their contracts is dependent on the economic conditions in the area, especially in the real estate sector.

Fair_Value_Disclosures

Fair Value Disclosures	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Disclosures	Fair Value Disclosures
	Certain assets and liabilities are recorded at fair value to provide additional insight into the Company's quality of earnings. Some of these assets and liabilities are measured on a recurring basis while others are measured on a nonrecurring basis, with the determination based upon applicable existing accounting pronouncements. For example, securities available for sale are recorded at fair value on a recurring basis. Other assets, such as, mortgage servicing rights, loans held for sale, and impaired loans, are recorded at fair value on a nonrecurring basis using the lower of cost or market methodology to determine impairment of individual assets. The Company groups assets and liabilities which are recorded at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. A financial instrument's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement (with level 1 considered highest and level 3 considered lowest). A brief description of each level follows.
	Level 1 – Valuation is based upon quoted prices for identical instruments in active markets.
	Level 2 – Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.
	Level 3 – Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates that market participants would use in pricing the asset or liability. Valuation includes use of discounted cash flow models and similar techniques.
	The fair value methods and assumptions for the Company's financial instruments and other assets measured at fair value are set forth below.
	Cash, Cash Equivalents and Interest-Bearing Deposits in Other Banks
	The carrying values of cash equivalents, due from banks and federal funds sold approximate their relative fair values. As such, the Company classifies these financial instruments as Level 1.
	Investment Securities
	The fair values of investment securities are estimated by independent providers using a market approach with observable
	inputs, including matrix pricing and recent transactions. In obtaining such valuation information from third parties, the
	Company has evaluated their valuation methodologies used to develop the fair values in order to determine whether the
	valuations are representative of an exit price in the Company's principal markets. The Company's principal markets for its
	securities portfolios are the secondary institutional markets, with an exit price that is predominantly reflective of bid level
	pricing in those markets. Fair values are calculated based on the value of one unit without regard to any premium or discount
	that may result from concentrations of ownership of a financial instrument, possible tax ramifications, or estimated transaction
	costs. If these considerations had been incorporated into the fair value estimates, the aggregate fair value could have been
	changed. The carrying values of restricted equity securities approximate fair values. As such, the Company classifies
	investment securities as Level 2.
	Loans Held for Sale
	Loans held for sale are recorded at the lower of carrying value or market value. The fair value of mortgage loans held for sale is based on what secondary markets are currently offering for portfolios with similar characteristics. As such, the Company classifies mortgage loans held for sale as Level 2.
	Loans
	Fair values are estimated for portfolios of loans with similar financial characteristics. The fair values of performing loans are
	calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that
	reflect the credit and interest risk inherent in the loan. The estimates of maturity are based on the Company's historical
	experience with repayments for each loan classification, modified, as required, by an estimate of the effect of current economic
	and lending conditions, and the effects of estimated prepayments. Assumptions regarding credit risk, cash flows, and discount
	rates are judgmentally determined using available market information and specific borrower information. Management has
	made estimates of fair value using discount rates that it believes to be reasonable. However, because there is no market for
	many of these financial instruments, Management has no basis to determine whether the fair value presented above would be
	indicative of the value negotiated in an actual sale. As such, the Company classifies loans as Level 3, except for certain
	collateral-dependent impaired loans. Fair values of impaired loans are based on estimated cash flows and are discounted using a
	rate commensurate with the risk associated with the estimated cash flows, or if collateral dependent, discounted to the
	appraised value of the collateral as determined by reference to sale prices of similar properties, less costs to sell. As such, the
	Company classifies collateral dependent impaired loans for which a specific reserve results in a fair value
	measure as Level 2. All other impaired loans are classified as Level 3.
	Other Real Estate Owned
	Real estate acquired through foreclosure is initially recorded at fair value. The fair value of other real estate owned is based on property appraisals and an analysis of sales prices of similar properties currently available. As such, the Company records other real estate owned as nonrecurring Level 2.
	Mortgage Servicing Rights
	Mortgage servicing rights represent the value associated with servicing residential mortgage loans. Servicing assets and servicing liabilities are reported using the amortization method and compared to fair value for impairment. In evaluating the fair values of mortgage servicing rights, the Company obtains third party valuations based on loan level data including note rate, type and term of the underlying loans. As such, the Company classifies mortgage servicing rights as Level 2.
	Accrued Interest Receivable
	The fair value estimate of this financial instrument approximates the carrying value as this financial instrument has a short maturity. It is the Company's policy to stop accruing interest on loans for which it is probable that the interest is not collectible. Therefore, this financial instrument has been adjusted for estimated credit loss. As such, the Company classifies accrued interest receivable as Level 2.
	Deposits
	The fair value of deposits is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits of similar remaining maturities. As such, the Company classifies deposits as Level 2.
	The fair value estimates do not include the benefit that results from the low-cost funding provided by the deposits compared to the cost of borrowing funds in the market. If that value were considered, the fair value of the Company's net assets could increase.
	Borrowed Funds
	The fair value of borrowed funds is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently available for borrowings of similar remaining maturities. As such, the Company classifies borrowed funds as Level 2.
	Accrued Interest Payable
	The fair value estimate approximates the carrying amount as this financial instrument has a short maturity. As such, the Company classifies accrued interest payable as Level 2.
	Off-Balance-Sheet Instruments
	Off-balance-sheet instruments include loan commitments. Fair values for loan commitments have not been presented as the future revenue derived from such financial instruments is not significant.
	Limitations
	Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These values do not reflect any premium or discount that could result from offering for sale at one time the Company's entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company's financial instruments, fair value estimates are based on Management's judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Fair value estimates are based on existing on- and off-balance-sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Other significant assets and liabilities that are not considered financial instruments include the deferred tax asset, premises and equipment, and other real estate owned. In addition, tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in any of the estimates.
	Assets and Liabilities Recorded at Fair Value on a Recurring Basis
	The following table presents the balances of assets and liabilities that were measured at fair value on a recurring basis as of December 31, 2014 and 2013.
		At December 31, 2014
		Level 1		Level 2		Level 3		Total
	Securities available for sale
	Mortgage-backed securities	$	—	$	151,855,000	$	—	$	151,855,000
	State and political subdivisions	—		30,855,000		—		30,855,000
	Other equity securities	—		2,551,000		—		2,551,000
	Total assets	$	—	$	185,261,000	$	—	$	185,261,000
		At December 31, 2013
		Level 1		Level 2		Level 3		Total
Securities available for sale
Mortgage-backed securities	$	—	$	177,729,000	$	—	$	177,729,000
State and political subdivisions	—		126,315,000		—		126,315,000
Other equity securities	—		1,780,000		—		1,780,000
Total assets	$	—	$	305,824,000	$	—	$	305,824,000
Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis
The following table presents assets measured at fair value on a nonrecurring basis that have had a fair value adjustment since their initial recognition. Other real estate owned is presented net of an allowance for losses of $654,000 and $330,000 at December 2014 and 2013, respectively. Only collateral-dependent impaired loans with a related specific allowance for loan losses or a partial charge off are included in impaired loans for purposes of fair value disclosures. Impaired loans below are presented net of specific allowances of $1,074,000 and $1,309,000 at December 31, 2014 and 2013, respectively.
	At December 31, 2014
	Level 1		Level 2		Level 3		Total
Other real estate owned	$	—	$	3,785,000	$	—	$	3,785,000
Impaired loans	—		1,909,000		—		1,909,000
Total Assets	$	—	$	5,694,000	$	—	$	5,694,000
	At December 31, 2013
	Level 1		Level 2		Level 3		Total
Other real estate owned	$	—	$	4,807,000	$	—	$	4,807,000
Impaired loans	—		1,116,000		—		1,116,000
Total Assets	$	—	$	5,923,000	$	—	$	5,923,000
Fair Value of Financial Instruments
FASB ASC Topic 825, "Financial Instruments," requires disclosures of fair value information about financial instruments, whether or not recognized in the balance sheet, if the fair values can be reasonably determined. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company's various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques using observable inputs when available. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. FASB ASC Topic 825 excludes certain financial instruments and all nonfinancial instruments from its disclosure requirements. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company.
The carrying amounts and estimated fair values for financial instruments as of December 31, 2014 were as follows:
	Carrying		Estimated
As of December 31, 2014	value		fair value		Level 1		Level 2		Level 3
Financial assets
Cash and cash equivalents	$	13,057,000	$	13,057,000	$	13,057,000	$	—	$	—
Interest bearing deposits in other banks	3,559,000		3,559,000		3,559,000		—		—
Securities available for sale	185,261,000		185,261,000		—		185,261,000		—
Securities to be held to maturity	275,919,000		279,704,000		—		279,704,000		—
Restricted equity securities	13,912,000		13,912,000		—		13,912,000		—
Loans (net of allowance for loan losses)
Commercial
Real estate	238,104,000		236,368,000		—		431,000		235,937,000
Construction	29,951,000		29,733,000		—		—		29,733,000
Other	102,738,000		102,858,000		—		—		102,858,000
Municipal	20,406,000		20,833,000		—		—		20,833,000
Residential
Term	382,620,000		389,200,000		—		990,000		388,210,000
Construction	12,136,000		12,123,000		—		—		12,123,000
Home equity line of credit	102,258,000		101,733,000		—		488,000		101,245,000
Consumer	19,007,000		19,207,000		—		—		19,207,000
Total loans	907,220,000		912,055,000		—		1,909,000		910,146,000
Mortgage servicing rights	1,086,000		2,088,000		—		2,088,000		—
Accrued interest receivable	4,748,000		4,748,000		—		4,748,000		—
Financial liabilities
Demand deposits	$	113,133,000	$	109,973,000	$	—	$	109,973,000	$	—
NOW deposits	199,977,000		186,490,000		—		186,490,000		—
Money market deposits	98,607,000		83,837,000		—		83,837,000		—
Savings deposits	165,601,000		146,936,000		—		146,936,000		—
Local certificates of deposit	205,072,000		205,360,000		—		205,360,000		—
National certificates of deposit	242,429,000		242,824,000		—		242,824,000		—
Total deposits	1,024,819,000		975,420,000		—		975,420,000		—
Repurchase agreements	74,725,000		70,783,000		—		70,783,000		—
Federal Home Loan Bank advances	205,191,000		208,259,000		—		208,259,000		—
Total borrowed funds	279,916,000		279,042,000		—		279,042,000		—
Accrued interest payable	521,000		521,000		—		521,000		—
The carrying amounts and estimated fair values for financial instruments as of December 31, 2013 were as follows:
	Carrying		Estimated
As of December 31, 2013	value		fair value		Level 1		Level 2		Level 3
Financial assets
Cash and cash equivalents	$	16,570,000	$	16,570,000	$	16,570,000	$	—	$	—
Interest bearing deposits in other banks	2,562,000		2,562,000		2,562,000		—		—
Securities available for sale	305,824,000		305,824,000		—		305,824,000		—
Securities to be held to maturity	169,277,000		158,336,000		—		158,336,000		—
Restricted equity securities	13,912,000		13,912,000		—		13,912,000		—
Loans held for sale	83,000		83,000		—		83,000		—
Loans (net of allowance for loan losses)
Commercial
Real estate	240,555,000		239,973,000		—		109,000		239,864,000
Construction	19,709,000		19,661,000		—		—		19,661,000
Other	92,625,000		92,855,000		—		229,000		92,626,000
Municipal	19,099,000		19,358,000		—		—		19,358,000
Residential
Term	375,932,000		381,918,000		—		778,000		381,140,000
Construction	11,778,000		11,794,000		—		—		11,794,000
Home equity line of credit	90,759,000		90,542,000		—		—		90,542,000
Consumer	14,396,000		14,438,000		—		—		14,438,000
Total loans	864,853,000		870,539,000		—		1,116,000		869,423,000
Mortgage servicing rights	1,158,000		1,948,000		—		1,948,000		—
Accrued interest receivable	5,038,000		5,038,000		—		5,038,000		—
Financial liabilities
Demand deposits	$	106,125,000	$	96,175,000	$	—	$	96,175,000	$	—
NOW deposits	151,322,000		129,815,000		—		129,815,000		—
Money market deposits	86,730,000		67,968,000		—		67,968,000		—
Savings deposits	149,103,000		122,891,000		—		122,891,000		—
Local certificates of deposit	226,658,000		228,767,000		—		228,767,000		—
National certificates of deposit	304,461,000		306,346,000		—		306,346,000		—
Total deposits	1,024,399,000		951,962,000		—		951,962,000		—
Repurchase agreements	94,477,000		94,477,000		—		94,477,000		—
Federal Home Loan Bank advances	184,648,000		189,644,000		—		189,644,000		—
Total borrowed funds	279,125,000		284,121,000		—		284,121,000		—
Accrued interest payable	599,000		599,000		—		599,000		—

Other_Operating_Income_and_Exp

Other Operating Income and Expense	12 Months Ended
	Dec. 31, 2014
Other Income and Expenses [Abstract]
Other Operating Income and Expense	Other Operating Income and Expense
	Other operating income and other operating expense include the following items greater than 1% of revenues.
	For the years ended December 31,	2014		2013		2012
	Other operating income
	ATM and debit card income	$	2,630,000	$	2,440,000	$	1,994,000
	Other operating expense
	Advertising and marketing expense	$	1,022,000	$	1,117,000	$	935,000
	Accounting and auditing expenses	746,000		674,000		630,000
	Collections/foreclosures/ other real estate owned expense	657,000		878,000		606,000
	ATM and interchange expense	760,000		778,000		940,000
	Legal fees and expenses	769,000		482,000		715,000

Legal_Contingencies

Legal Contingencies	12 Months Ended
	Dec. 31, 2014
Loss Contingency [Abstract]
Legal Contingencies	Legal Contingencies
	Various legal claims also arise from time to time in the normal course of business which, in the opinion of Management, will have no material effect on the Company's consolidated financial statements.

Reclassifications

Reclassifications	12 Months Ended
	Dec. 31, 2014
Prior Period Adjustment [Abstract]
Reclassifications	Reclassifications
	Certain items from prior years were reclassified in the financial statements to conform with the current year presentation. These do not have a material impact on the balance sheet or statement of income presentations.

Condensed_Financial_Informatio

Condensed Financial Information of Parent	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Financial Information of Parent	Condensed Financial Information of Parent
	Condensed financial information for The First Bancorp, Inc. exclusive of its subsidiary is as follows:
	Balance Sheets
	As of December 31,	2014			2013
	Assets
	Cash and cash equivalents	$	522,000		$	1,113,000
	Dividends receivable	2,500,000			1,500,000
	Investments	528,000			543,000
	Investment in subsidiary	132,399,000			117,391,000
	Premises and equipment	24,000			32,000
	Goodwill	27,559,000			27,559,000
	Other assets	302,000			203,000
	Total assets	$	163,834,000		$	148,341,000
	Liabilities and shareholders' equity
	Dividends payable	$	2,252,000		$	2,134,000
	Other liabilities	28,000			109,000
	Total liabilities	2,280,000			2,243,000
	Shareholders' equity
	Common stock	107,000			106,000
	Additional paid-in capital	59,282,000			58,395,000
	Retained earnings	102,125,000			87,523,000
	Accumulated other comprehensive income
	Net unrealized gain on available for sale securities,	40,000			74,000
	net of tax
	Total accumulated other comprehensive income	40,000			74,000
	Total shareholders' equity	161,554,000			146,098,000
	Total liabilities and shareholders' equity	$	163,834,000		$	148,341,000
	Statements of Income
	For the years ended December 31,	2014			2013			2012
	Interest and dividends on investments	$	15,000		$	10,000		$	10,000
	Net securities gains	38,000			—			—
	Total income	53,000			10,000			10,000
	Occupancy expense	12,000			11,000			8,000
	Other operating expense	604,000			362,000			218,000
	Total expense	616,000			373,000			226,000
	Loss before income taxes and Bank earnings	(563,000		)	(363,000		)	(216,000		)
	Applicable income taxes	(200,000		)	(128,000		)	(76,000		)
	Loss before Bank earnings	(363,000		)	(235,000		)	(140,000		)
	Equity in earnings of Bank
	Remitted	8,850,000			7,096,000			9,694,000
	Unremitted	6,222,000			6,104,000			3,134,000
	Net income	$	14,709,000		$	12,965,000		$	12,688,000
	Statements of Cash Flows
	For the years ended December 31,	2014			2013			2012
	Cash flows from operating activities:
	Net income	$	14,709,000		$	12,965,000		$	12,688,000
	Adjustments to reconcile net income to net cash provided by operating activities:
	Depreciation	9,000			11,000			8,000
	Equity compensation expense	431,000			214,000			85,000
	Gain on sale of investment	(38,000		)	—			—
	Increase in other assets	(98,000		)	(132,000		)	(15,000		)
	(Increase) decrease in dividend receivable	(1,050,000		)	400,000			—
	Increase (decrease) in other liabilities	105,000			258,000			(5,000		)
	Unremitted earnings of Bank	(6,222,000		)	(6,104,000		)	(3,134,000		)
	Net cash provided by operating activities	7,846,000			7,612,000			9,627,000
	Cash flows from investing activities:
	Capital expenditures	(1,000		)	—			(25,000		)
	Net cash used in investing activities	(1,000		)	—			(25,000		)
	Cash flows from financing activities:
	Payment to repurchase preferred stock	—			(12,500,000		)	—
	Proceeds from sale of common stock	457,000			11,973,000			499,000
	Dividends paid	(8,893,000		)	(8,657,000		)	(8,310,000		)
	Net cash used in financing activities	(8,436,000		)	(9,184,000		)	(7,811,000		)
	Net increase (decrease) in cash and cash equivalents	(591,000		)	(1,572,000		)	1,791,000
Cash and cash equivalents at beginning of year	1,113,000			2,685,000			894,000
Cash and cash equivalents at end of year	$	522,000		$	1,113,000		$	2,685,000

New_Accounting_Pronouncements_

New Accounting Pronouncements New Accounting Pronouncements (Notes)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements
	In January 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-01, Accounting for Investments in
	Qualified Affordable Housing Projects. The amendments in this Update permit entities to make accounting policy elections to
	account for their investments in qualified affordable housing projects using the proportional amortization method if certain
	conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in
	proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income
	statement as a component of income tax expense (benefit). For those investments in qualified affordable housing projects not
	accounted for using the proportional amortization method, the ASU requires the investment to be accounted for as an equity
	method investment or a cost method investment. The amendments in this Update should be applied retrospectively to all
	periods presented. A reporting entity that uses the effective yield method to account for its investments in qualified affordable
	housing projects before the date of adoption may continue to apply the effective yield method for those preexisting investments.
	The amendments in this ASU are effective for annual periods and interim reporting periods within those annual periods,
	beginning after December 15, 2014. Early adoption is permitted. Management has reviewed the ASU and does not believe that
	it will have a material effect on the Company's consolidated financial statements.
	In January 2014, the FASB issued ASU No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer
	Mortgage Loans upon Foreclosure. The amendments in this Update clarify that an in-substance repossession or foreclosure
	occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a
	consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion
	of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that
	loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments
	require disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded
	investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure.
	The amendments in this Update are effective for annual periods and interim reporting periods within those annual periods,
	beginning after December 15, 2014. Management has reviewed the ASU and does not believe that it will have a material effect
	on the Company's consolidated financial statements.
	In May 2014, the FASB Issued ASU No. 2014-09, Revenue from Contracts with Customers. The ASU was issued to clarify
	the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP and International Financial
	Reporting Standards. The ASU is effective for annual reporting periods beginning after December 15, 2016, including interim
	periods within that reporting period. The Company is currently evaluating the potential impact of the ASU on its consolidated
	financial statements.
	In June 2014, the FASB issued ASU No. 2014-11, Transfers and Servicing: Repurchase-to-Maturity Transactions,
	Repurchase Financings, and Disclosures. The ASU was issued to respond to concerns about current accounting and disclosures
	for repurchase agreements and similar transactions. The concern was that under current accounting guidance there is an
	unnecessary distinction between the accounting for different types of repurchase agreements. Under current guidance, the
	repurchase-to-maturity transactions are accounted for as sales with forward agreements, whereas repurchase agreements that
	settle before the maturity of the transferred financial asset are accounted for as secured borrowings. The ASU amendments
	require new disclosures for repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions
	accounted for as secured borrowings. The ASU is effective for annual periods, and interim periods within those annual periods,
	beginning after December 15, 2014. The ASU will not have a material effect on the Company's consolidated financial
	statements.
	In June 2014, the FASB issued ASU No. 2014-12, Compensation - Stock Compensation: Accounting for Share-Based
	Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service
	Period. The ASU was issued because current U.S. GAAP does not contain explicit guidance on how to account for share-based
	payments when a performance target could be achieved after the requisite service period. The ASU is effective for annual
	periods and interim periods within those annual periods beginning after December 15, 2015. The ASU will not have a material
	effect on the Company's consolidated financial statements.
	In August 2014, the FASB issued ASU No. 2014-14, Receivables - Troubled Debt Restructurings by Creditors:
	Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure. The ASU was issued to provide specific
	guidance on how to classify or measure foreclosed mortgage loans that are government guaranteed. The ASU is effective for
	annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The ASU is not expected
	to have a material effect on the Company's consolidated financial statements.

Quarterly_Information

Quarterly Information	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Information	Quarterly Information
	The following tables provide unaudited financial information by quarter for each of the past two years:
	Dollars in thousands except per share data	2013Q1			2013Q2			2013Q3			2013Q4			2014Q1		2014Q2		2014Q3			2014Q4
	Balance Sheets
	Cash and cash equivalents	$	16,523		$	18,683		$	20,117		$	16,570		$	13,894	$	20,416	$	17,167		$	13,057
	Interest-bearing deposits in other banks	5,941			334			787			2,562			2,935		272		773			3,559
	Investments	437,160			464,999			490,151			475,101			488,553		502,015		472,660			461,180
	Restricted equity securities	13,912			13,912			13,912			13,912			13,912		13,912		13,912			13,912
	Net loans and loans held for sale	851,001			854,448			851,171			864,936			857,315		880,492		896,857			907,220
	Other assets	92,250			92,120			88,611			90,882			89,508		86,973		87,268			83,203
	Total assets	$	1,416,787		$	1,444,496		$	1,464,749		$	1,463,963		$	1,466,117	$	1,504,080	$	1,488,637		$	1,482,131
	Deposits	$	975,861		$	1,027,682		$	1,037,466		$	1,024,399		$	1,045,970	$	1,033,436	$	1,055,322		$	1,024,819
	Borrowed funds	261,185			257,108			266,777			279,125			253,519		298,520		258,636			279,916
	Other liabilities	16,070			13,734			13,853			14,341			14,212		14,675		15,489			15,842
	Shareholders' equity	163,671			145,972			146,653			146,098			152,416		157,449		159,190			161,554
	Total liabilities	$	1,416,787		$	1,444,496		$	1,464,749		$	1,463,963		$	1,466,117	$	1,504,080	$	1,488,637		$	1,482,131
	& equity
	Income and Comprehensive Income (Loss) Statements
	Interest income	$	12,265		$	12,249		$	12,655		$	12,767		$	12,623	$	12,740	$	12,869		$	12,790
	Interest expense	3,102			3,138			3,150			3,106			2,912		2,905		2,865			2,743
	Net interest income	9,163			9,111			9,505			9,661			9,711		9,835		10,004			10,047
	Provision for	1,500			1,200			800			700			400		100		350			300
	loan losses
	Net interest income after provision for loan losses	7,663			7,911			8,705			8,961			9,311		9,735		9,654			9,747
	Non-interest income	3,288			3,579			2,621			2,599			2,332		2,458		3,656			2,602
	Non-interest expense	7,389			7,423			7,006			7,119			7,252		7,291		7,802			7,875
	Income before taxes	3,562			4,067			4,320			4,441			4,391		4,902		5,508			4,474
	Income taxes	706			825			955			939			963		1,155		1,400			1,048
	Net income	$	2,856		$	3,242		$	3,365		$	3,502		$	3,428	$	3,747	$	4,108		$	3,426
	Basic earnings per share	$	0.27		$	0.29		$	0.31		$	0.33		$	0.32	$	0.35	$	0.39		$	0.32
	Diluted earnings per share	$	0.27		$	0.29		$	0.31		$	0.33		$	0.32	$	0.35	$	0.38		$	0.32
	Other comprehensive income (loss), net of tax
	Net unrealized gain (loss) on securities available for sale	$	(2,466	)	$	(8,907	)	$	(779	)	$	(2,379	)	$	4,824	$	3,313	$	(319	)	$	1,295
	Net unrealized loss on securities transfered from available for sale to held to maturity	—			—			—			—			—		—		(28		)	(20		)
	Unrecognized gain (loss) on postretirement benefit costs	4			4			—			303			—		—		—			(313		)
	Other comprehensive income (loss)	$	(2,462	)	$	(8,903	)	$	(779	)	$	(2,076	)	$	4,824	$	3,313	$	(347	)	$	962
	Comprehensive income (loss)	$	394		$	(5,661	)	$	2,586		$	1,426		$	8,252	$	7,060	$	3,761		$	4,388

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events
	In September 2014, it was discovered that checks payable to United Mid-Coast Charities (UMCC) of Camden, Maine, had been improperly deposited by UMCC’s former President to an account at the Bank. UMCC and the Bank cooperated with and assisted each other in a mutual effort to address the situation and, in February 2015, reached a settlement agreement which releases the Bank and the Company from any and all claims with regard to this situation. The agreement has no material impact on the Company’s financial condition or results of operations.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation
	The consolidated financial statements include the accounts of the Company and the Bank. All intercompany accounts and transactions have been eliminated in consolidation.
Subsequent Events	Subsequent Events
	Events occurring subsequent to December 31, 2014, have been evaluated as to their potential impact to the financial statements.
Use of Estimates in Preparation of Financial Statements	Use of Estimates in Preparation of Financial Statements
	In preparing the financial statements in accordance with accounting principles generally accepted in the United States of America ("GAAP"), Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the balance sheet and revenues and expenses for the reporting period. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change in the near-term relate to the determination of the allowance for loan losses, goodwill, the valuation of mortgage servicing rights, and other-than-temporary impairment of securities.
Investment Securities	Investment Securities
	Investment securities are classified as available for sale or held to maturity when purchased. There are no trading account securities. Securities available for sale consist primarily of debt securities which Management intends to hold for indefinite periods of time. They may be used as part of the Bank's funds management strategy, and may be sold in response to changes in interest rates or prepayment risk, changes in liquidity needs, or for other reasons. They are accounted for at fair value, with unrealized gains or losses adjusted through shareholders' equity, net of related income taxes. The cost basis is adjusted for the amortization of premiums and accretion of discounts. Securities to be held to maturity consist primarily of debt securities which Management has acquired solely for long-term investment purposes, rather than for purposes of trading or future sale. For securities to be held to maturity, Management has the intent and the Bank has the ability to hold such securities until their respective maturity dates. Such securities are carried at cost adjusted for the amortization of premiums and accretion of discounts. Investment securities transactions are accounted for on a settlement date basis; reported amounts would not be materially different from those accounted for on a trade date basis. Gains and losses on the sales of investment securities are determined using the amortized cost of the specifically identified security. For declines in the fair value of individual debt securities available for sale below their cost that are deemed to be other than temporary, where the Company does not intend to sell the security and it is more likely than not that the Company will not be required to sell the security before recovery of its amortized cost basis, the other-than-temporary decline in the fair value of the debt security related to 1) credit loss is recognized in earnings and 2) other factors is recognized in other comprehensive income or loss. Credit loss is deemed to exist if the present value of expected future cash flows using the effective rate at acquisition is less than the amortized cost basis of the debt security. For individual debt securities where the Company intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost, the other-than-temporary impairment is recognized in earnings equal to the entire difference between the security's cost basis and its fair value at the balance sheet date.
Loans Held for Sale	Loans Held for Sale
	Loans held for sale consist of residential real estate mortgage loans and are carried at the lower of aggregate cost or fair value, as determined by current investor yield requirements.
Loans	Loans
	Loans are generally reported at their outstanding principal balances, adjusted for chargeoffs, the allowance for loan losses and any deferred fees or costs to originate loans. Loan commitments are recorded when funded.
Loan Fees and Costs	Loan Fees and Costs
	Loan origination fees and certain direct loan origination costs are deferred and recognized in interest income as an adjustment to the loan yield over the life of the related loans. The unamortized net deferred fees and costs are included on the balance sheets with the related loan balances, and the amortization is included with the related interest income.
Allowance for Loan Losses	Allowance for Loan Losses
	Loans considered to be uncollectible are charged against the allowance for loan losses. The allowance for loan losses is maintained at a level determined by Management to be appropriate to absorb probable losses. This allowance is increased by provisions charged to operating expenses and recoveries on loans previously charged off. Arriving at an appropriate level of allowance for loan losses necessarily involves a high degree of judgment. In determining the appropriate level of allowance for loan losses, Management takes into consideration several factors, including reviews of individual non-performing loans and performing loans listed on the watch report requiring periodic evaluation, loan portfolio size by category, recent loss experience, delinquency trends and current economic conditions. For all loan classes, loans over 30 days past due are considered delinquent. Impaired loans include restructured loans and loans placed on non-accrual status when, based on current information and events, it is probable that the Bank will be unable to collect all amounts due according to the contractual terms of the loan agreement. These loans are measured at the present value of expected future cash flows discounted at the loan's effective interest rate or at the fair value of the collateral if the loan is collateral dependent. Management takes into consideration impaired loans in addition to the above mentioned factors in determining the appropriate level of allowance for loan losses.
Troubled Debt Restructured	Troubled Debt Restructured
	A troubled debt restructured ("TDR") constitutes a restructuring of debt if the Bank, for economic or legal reasons related to the borrower's financial difficulties, grants a concession to the borrower that it would not otherwise consider. To determine whether or not a loan should be classified as a TDR, Management evaluates a loan to first determine if the borrower demonstrates financial difficulty. Common indicators of this include past due status with bank obligations, substandard credit bureau reports, or an inability to refinance with another lender. If the borrower is experiencing financial difficulty and concessions are granted, such as maturity date extension, interest rate adjustments to below market pricing, or a deferment of payments, the loan will generally be classified as a TDR.
Accrual of Interest Income and Expense	Accrual of Interest Income and Expense
	Interest on loans and investment securities is taken into income using methods which relate the income earned to the balances of loans and investment securities outstanding. Interest expense on liabilities is derived by applying applicable interest rates to principal amounts outstanding. For all classes of loans, recording of interest income on problem loans, which includes impaired loans, ceases when collectibility of principal and interest within a reasonable period of time becomes doubtful. Cash payments received on non-accrual loans, which includes impaired loans, are applied to reduce the loan's principal balance until the remaining principal balance is deemed collectible, after which interest is recognized when collected. As a general rule, a loan may be restored to accrual status when payments are current for a substantial period of time, generally six months, and repayment of the remaining contractual amounts is expected or when it otherwise becomes well secured and in the process of collection.
Premises and Equipment	Premises and Equipment
	Premises, furniture and equipment are stated at cost, less accumulated depreciation. Depreciation expense is computed by straight-line methods over the asset's estimated useful life.
Other Real Estate Owned (OREO)	Other Real Estate Owned ("OREO")
	Real estate acquired by foreclosure or deed in lieu of foreclosure is transferred to OREO and recorded at fair value, less estimated costs to sell, based on appraised value at the date actually or constructively received. Loan losses arising from the acquisition of such property are charged against the allowance for loan losses. Subsequent provisions to reduce the carrying value of a property are recorded to the allowance for OREO losses and a charge to operations on a specific property basis.
Goodwill and Identified Intangible Assets	Goodwill and Identified Intangible Assets
	Intangible assets include the excess of the purchase price over the fair value of net assets acquired (goodwill) from the acquisition of FNB Bankshares in 2005 as well as the core deposit intangible related to the same acquisition. The core deposit intangible is amortized on a straight-line basis over ten years. Annual amortization expense for 2014, 2013 and 2012 was $283,000 and the amortization expense for 2015 will be $14,000 as the expense will be fully amortized. Intangible assets also include the goodwill and core deposit intangible from the 2012 acquisition of a bank branch in Rockland, Maine and a bank building in Bangor, Maine. The core deposit intangible will be amortized on a straight-line basis over ten years. Annual amortization expense for 2014 and 2013 was $43,000, and the amortization expense for each year until fully amortized will be $43,000. The straight-line basis is used because the Company does not expect significant run off in the core deposits acquired. The Company annually evaluates goodwill, and periodically evaluates other intangible assets, for impairment. At December 31, 2014, the Company determined goodwill and other intangible assets were not impaired.
Income Taxes	Income Taxes
	Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between financial statement carrying amounts of assets and liabilities and their respective tax bases, and for tax credits that are available to offset future taxable income. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period the change is enacted
Loan Servicing	Loan Servicing
	Servicing rights are recognized when they are acquired through sale of loans. Capitalized servicing rights are reported in other assets and are amortized into non-interest income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing rights are evaluated for impairment based upon the fair value of the rights as compared to amortized cost. Impairment is determined by stratifying rights by predominant characteristics, such as interest rates and terms. Impairment is recognized through a valuation allowance for an individual stratum, to the extent that fair value is less than the capitalized amount for the stratum.
Post-Retirement Benefits	Post-Retirement Benefits
	The cost of providing post-retirement benefits is accrued during the active service period of the employee or director.
Earnings Per Share	Earnings Per Share
	Basic earnings per share data are based on the weighted average number of common shares outstanding during each year. Diluted earnings per share gives effect to restricted stock granted and stock options and warrants outstanding, determined by the treasury stock method.
Comprehensive Income	Comprehensive Income
	Comprehensive income includes net income and other comprehensive income (loss), which is comprised of the change in unrealized gains and losses on securities available for sale, net of tax, change in unrealized losses on securities transferred from available for sale to held to maturity, net of amortization, and unrecognized gains and losses related to post-retirement benefit costs, net of tax.
Segments	Segments
	The First Bancorp, Inc., through the branches of its subsidiary, The First, N.A., provides a broad range of financial services to individuals and companies in coastal Maine. These services include demand, time, and savings deposits; lending; ATM processing; and investment management and trust services. Operations are managed and financial performance is evaluated on a corporate-wide basis. Accordingly, all of the Company's banking operations are considered by Management to be aggregated in one reportable operating segment.
New Accounting Pronouncements	New Accounting Pronouncements
	In January 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-01, Accounting for Investments in
	Qualified Affordable Housing Projects. The amendments in this Update permit entities to make accounting policy elections to
	account for their investments in qualified affordable housing projects using the proportional amortization method if certain
	conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in
	proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income
	statement as a component of income tax expense (benefit). For those investments in qualified affordable housing projects not
	accounted for using the proportional amortization method, the ASU requires the investment to be accounted for as an equity
	method investment or a cost method investment. The amendments in this Update should be applied retrospectively to all
	periods presented. A reporting entity that uses the effective yield method to account for its investments in qualified affordable
	housing projects before the date of adoption may continue to apply the effective yield method for those preexisting investments.
	The amendments in this ASU are effective for annual periods and interim reporting periods within those annual periods,
	beginning after December 15, 2014. Early adoption is permitted. Management has reviewed the ASU and does not believe that
	it will have a material effect on the Company's consolidated financial statements.
	In January 2014, the FASB issued ASU No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer
	Mortgage Loans upon Foreclosure. The amendments in this Update clarify that an in-substance repossession or foreclosure
	occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a
	consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion
	of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that
	loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments
	require disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded
	investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure.
	The amendments in this Update are effective for annual periods and interim reporting periods within those annual periods,
	beginning after December 15, 2014. Management has reviewed the ASU and does not believe that it will have a material effect
	on the Company's consolidated financial statements.
	In May 2014, the FASB Issued ASU No. 2014-09, Revenue from Contracts with Customers. The ASU was issued to clarify
	the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP and International Financial
	Reporting Standards. The ASU is effective for annual reporting periods beginning after December 15, 2016, including interim
	periods within that reporting period. The Company is currently evaluating the potential impact of the ASU on its consolidated
	financial statements.
	In June 2014, the FASB issued ASU No. 2014-11, Transfers and Servicing: Repurchase-to-Maturity Transactions,
	Repurchase Financings, and Disclosures. The ASU was issued to respond to concerns about current accounting and disclosures
	for repurchase agreements and similar transactions. The concern was that under current accounting guidance there is an
	unnecessary distinction between the accounting for different types of repurchase agreements. Under current guidance, the
	repurchase-to-maturity transactions are accounted for as sales with forward agreements, whereas repurchase agreements that
	settle before the maturity of the transferred financial asset are accounted for as secured borrowings. The ASU amendments
	require new disclosures for repurchase agreements, securities lending transactions, and repurchase-to-maturity transactions
	accounted for as secured borrowings. The ASU is effective for annual periods, and interim periods within those annual periods,
	beginning after December 15, 2014. The ASU will not have a material effect on the Company's consolidated financial
	statements.
	In June 2014, the FASB issued ASU No. 2014-12, Compensation - Stock Compensation: Accounting for Share-Based
	Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service
	Period. The ASU was issued because current U.S. GAAP does not contain explicit guidance on how to account for share-based
	payments when a performance target could be achieved after the requisite service period. The ASU is effective for annual
	periods and interim periods within those annual periods beginning after December 15, 2015. The ASU will not have a material
	effect on the Company's consolidated financial statements.
	In August 2014, the FASB issued ASU No. 2014-14, Receivables - Troubled Debt Restructurings by Creditors:
	Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure. The ASU was issued to provide specific
	guidance on how to classify or measure foreclosed mortgage loans that are government guaranteed. The ASU is effective for
	annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The ASU is not expected
	to have a material effect on the Company's consolidated financial statements.

Investment_Securities_Tables

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Schedule of Available For Sale, Held-to-Maturity, and Restricted Equity Securities	The following tables summarize the amortized cost and estimated fair value of investment securities at December 31, 2014 and 2013:
		Amortized		Unrealized			Unrealized			Fair Value
	As of December 31, 2014	Cost		Gains			Losses			(Estimated)
	Securities available for sale
	Mortgage-backed securities	$	149,796,000	$	2,637,000		$	(578,000	)	$	151,855,000
	State and political subdivisions	29,094,000		1,865,000			(104,000		)	30,855,000
	Other equity securities	2,490,000		65,000			(4,000		)	2,551,000
		$	181,380,000	$	4,567,000		$	(686,000	)	$	185,261,000
	Securities to be held to maturity
	U.S. Government-sponsored agencies	$	92,341,000	$	54,000		$	(2,066,000	)	$	90,329,000
	Mortgage-backed securities	57,003,000		1,830,000			(116,000		)	58,717,000
	State and political subdivisions	126,275,000		4,114,000			(31,000		)	130,358,000
	Corporate securities	300,000		—			—			300,000
		$	275,919,000	$	5,998,000		$	(2,213,000	)	$	279,704,000
	Restricted equity securities
	Federal Home Loan Bank Stock	$	12,875,000	$	—		$	—		$	12,875,000
	Federal Reserve Bank Stock	1,037,000		—			—			1,037,000
		$	13,912,000	$	—		$	—		$	13,912,000
		Amortized		Unrealized			Unrealized			Fair Value
	As of December 31, 2013	Cost		Gains			Losses			(Estimated)
	Securities available for sale
	Mortgage-backed securities	$	180,109,000	$	1,392,000		$	(3,772,000	)	$	177,729,000
	State and political subdivisions	134,188,000		1,458,000			(9,331,000		)	126,315,000
	Other equity securities	1,666,000		116,000			(2,000		)	1,780,000
		$	315,963,000	$	2,966,000		$	(13,105,000	)	$	305,824,000
	Securities to be held to maturity
	U.S. Government-sponsored agencies	$	92,280,000	$	1,000		$	(12,757,000	)	$	79,524,000
	Mortgage-backed securities	35,712,000		1,440,000			(1,336,000		)	35,816,000
	State and political subdivisions	40,985,000		1,823,000			(112,000		)	42,696,000
	Corporate securities	300,000		—			—			300,000
		$	169,277,000	$	3,264,000		$	(14,205,000	)	$	158,336,000
	Restricted equity securities
	Federal Home Loan Bank Stock	$	12,875,000	$	—		$	—		$	12,875,000
	Federal Reserve Bank Stock	1,037,000		—			—			1,037,000
		$	13,912,000	$	—		$	—		$	13,912,000
Contractual Maturities of Investment Securities	The following table summarizes the contractual maturities of investment securities at December 31, 2014:
		Securities available for sale					Securities to be held to maturity
		Amortized Cost		Fair Value (Estimated)			Amortized Cost			Fair Value (Estimated)
	Due in 1 year or less	$	2,309,000	$	2,329,000		$	1,693,000		$	1,713,000
	Due in 1 to 5 years	15,200,000		15,499,000			8,467,000			8,702,000
	Due in 5 to 10 years	18,547,000		19,124,000			50,629,000			52,717,000
	Due after 10 years	142,834,000		145,758,000			215,130,000			216,572,000
	Equity securities	2,490,000		2,551,000			—			—
		$	181,380,000	$	185,261,000		$	275,919,000		$	279,704,000
	The following table summarizes the contractual maturities of investment securities at December 31, 2013:
		Securities available for sale					Securities to be held to maturity
	In thousands of dollars	Amortized		Fair Value (Estimated)			Amortized			Fair Value (Estimated)
		Cost					Cost
	Due in 1 year or less	$	717,000	$	721,000		$	268,000		$	273,000
	Due in 1 to 5 years	20,547,000		20,636,000			6,420,000			6,790,000
	Due in 5 to 10 years	16,114,000		16,267,000			33,442,000			33,828,000
	Due after 10 years	276,919,000		266,420,000			129,147,000			117,445,000
	Equity securities	1,666,000		1,780,000			—			—
		$	315,963,000	$	305,824,000		$	169,277,000		$	158,336,000
Schedule of Securities Gains and Losses	The following table shows securities gains and losses for 2014, 2013 and 2012:
		2014		2013			2012
	Proceeds from sales of securities	$	15,557,000	$	10,563,000		$	26,437,000
	Gross realized gains	1,155,000		1,087,000			2,257,000
	Gross realized losses	—		—			(289,000		)
	Net gain	$	1,155,000	$	1,087,000		$	1,968,000
	Related income taxes	$	404,000	$	380,000		$	689,000
Schedule of Temporary Impairment Losses	Information regarding securities temporarily impaired as of December 31, 2014 is summarized below:
		Less than 12 months					12 months or more						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
	As of December 31, 2014	Value		Losses			Value			Losses			Value		Losses
	U.S. Government-sponsored agencies	$	—	$	—		$	79,444,000		$	(2,066,000	)	$	79,444,000	$	(2,066,000	)
	Mortgage-backed securities	13,878,000		(40,000		)	29,182,000			(654,000		)	43,060,000		(694,000		)
	State and political subdivisions	3,352,000		(31,000		)	3,017,000			(104,000		)	6,369,000		(135,000		)
	Other equity securities	68,000		(3,000		)	51,000			(1,000		)	119,000		(4,000		)
		$	17,298,000	$	(74,000	)	$	111,694,000		$	(2,825,000	)	$	128,992,000	$	(2,899,000	)
	Information regarding securities temporarily impaired as of December 31, 2013 is summarized below:
		Less than 12 months					12 months or more						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
	As of December 31, 2013	Value		Losses			Value			Losses			Value		Losses
	U.S. Government-sponsored agencies	$	78,724,000	$	(12,757,000	)	$	—		$	—		$	78,724,000	$	(12,757,000	)
	Mortgage-backed securities	96,263,000		(4,977,000		)	5,451,000			(131,000		)	101,714,000		(5,108,000		)
	State and political subdivisions	69,406,000		(7,895,000		)	7,150,000			(1,548,000		)	76,556,000		(9,443,000		)
	Other equity securities	—		—			50,000			(2,000		)	50,000		(2,000		)
		$	244,393,000	$	(25,629,000	)	$	12,651,000		$	(1,681,000	)	$	257,044,000	$	(27,310,000	)

Mortgage_Servicing_Rights_Tabl

Mortgage Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2014
Transfers and Servicing [Abstract]
Reconciliation of Mortgage Servicing Assets	Mortgage servicing rights are included in other assets and detailed in the following table:
	As of December 31,	2014			2013
	Mortgage servicing rights	$	6,039,000		$	7,172,000
	Accumulated amortization	(4,949,000		)	(5,988,000		)
	Impairment reserve	(4,000		)	(26,000		)
		$	1,086,000		$	1,158,000

Loans_Tables

Loans (Tables)	12 Months Ended
	Dec. 31, 2014
Loans and Leases Receivable Disclosure [Abstract]
Composition of Loan Portfolio	The following table shows the composition of the Company's loan portfolio as of December 31, 2014 and 2013:
		December 31, 2014							December 31, 2013
	Commercial
	Real estate	$	242,311,000			26.4	%		$	245,943,000		28.2	%
	Construction	30,932,000				3.4	%		20,382,000			2.3	%
	Other	104,531,000				11.4	%		95,289,000			10.9	%
	Municipal	20,424,000				2.2	%		19,117,000			2.2	%
	Residential
	Term	384,032,000				41.9	%		377,218,000			43	%
	Construction	12,160,000				1.3	%		11,803,000			1.3	%
	Home equity line of credit	103,521,000				11.3	%		91,549,000			10.4	%
	Consumer	19,653,000				2.1	%		15,066,000			1.7	%
	Total loans	$	917,564,000			100	%		$	876,367,000		100	%
Loans to Directors, Officers and Employees which exceed $60,000	A summary of loans to directors and executive officers is as follows:
	For the years ended December 31,	2014				2013
	Balance at beginning of year	$	14,884,000			$	14,917,000
	New loans	8,932,000				909,000
	Repayments	(8,960,000		)		(942,000		)
	Balance at end of year	$	14,856,000			$	14,884,000
Past Due Loans Aging	Information on the past-due status of loans as of December 31, 2014, is presented in the following table:
		30-59 Days				60-89 Days				90+ Days			All		Current		Total		90+ Days
		Past Due				Past Due				Past Due			Past Due						&
																			Accruing
	Commercial
	Real estate	$	24,000			$	75,000			$	761,000		$	860,000	$	241,451,000	$	242,311,000	$	—
	Construction	—				41,000				208,000			249,000		30,683,000		30,932,000		—
	Other	3,000				—				857,000			860,000		103,671,000		104,531,000		—
	Municipal	—				—				—			—		20,424,000		20,424,000		—
	Residential
	Term	856,000				468,000				5,679,000			7,003,000		377,029,000		384,032,000		101,000
	Construction	—				—				—			—		12,160,000		12,160,000		—
	Home equity line of credit	622,000				720,000				780,000			2,122,000		101,399,000		103,521,000		—
	Consumer	637,000				52,000				80,000			769,000		18,884,000		19,653,000		80,000
	Total	$	2,142,000			$	1,356,000			$	8,365,000		$	11,863,000	$	905,701,000	$	917,564,000	$	181,000
	Information on the past-due status of loans as of December 31, 2013, is presented in the following table:
		30-59 Days Past Due				60-89 Days Past Due				90+ Days Past Due			All Past Due		Current		Total		90+ Days & Accruing
	Commercial
	Real estate	$	82,000			$	259,000			$	745,000		$	1,086,000	$	244,857,000	$	245,943,000	$	—
	Construction	—				—				—			—		20,382,000		20,382,000		—
	Other	544,000				128,000				2,797,000			3,469,000		91,820,000		95,289,000		—
	Municipal	—				—				—			—		19,117,000		19,117,000		—
	Residential
	Term	229,000				1,913,000				7,002,000			9,144,000		368,074,000		377,218,000		596,000
	Construction	47,000				—				—			47,000		11,756,000		11,803,000		—
	Home equity line of credit	573,000				145,000				1,001,000			1,719,000		89,830,000		91,549,000		59,000
	Consumer	113,000				26,000				388,000			527,000		14,539,000		15,066,000		388,000
	Total	$	1,588,000			$	2,471,000			$	11,933,000		$	15,992,000	$	860,375,000	$	876,367,000	$	1,043,000
Nonaccrual Loans	Information on nonaccrual loans as of December 31, 2014 and 2013 is presented in the following table:
	As of December 31,	2014				2013
	Commercial
	Real estate	$	2,088,000			$	2,457,000
	Construction	208,000				—
	Other	935,000				4,370,000
	Municipal	—				—
	Residential
	Term	6,421,000				8,484,000
	Construction	—				—
	Home equity line of credit	832,000				1,007,000
	Consumer	26,000				—
	Total	$	10,510,000			$	16,318,000
Impaired Loans	Information regarding impaired loans is as follows:
	For the years ended December 31,	2014				2013				2012
	Average investment in impaired loans	$	38,404,000			$	45,722,000			$	45,019,000
	Interest income recognized on impaired loans, all on cash basis	1,465,000				1,750,000				1,039,000
	As of December 31,	2014				2013
	Balance of impaired loans	$	35,862,000			$	42,351,000
	Less portion for which no allowance for loan losses is allocated	(26,313,000		)		(32,417,000		)
	Portion of impaired loan balance for which an allowance for loan losses is allocated	$	9,549,000			$	9,934,000
	Portion of allowance for loan losses allocated to the impaired loan balance	$	1,803,000			$	2,461,000
Impaired Loans by class of financing receivable	A breakdown of impaired loans by category as of December 31, 2014, is presented in the following table:
		Recorded Investment				Unpaid				Related Allowance			Average		Recognized Interest
						Principal Balance							Recorded Investment		Income
	With No Related Allowance
	Commercial
	Real estate	$	11,687,000			$	12,423,000			$	—		$	11,080,000	$	488,000
	Construction	—				—				—			30,000		—
	Other	2,616,000				3,407,000				—			3,853,000		156,000
	Municipal	—				—				—			—		—
	Residential
	Term	10,820,000				11,824,000				—			10,505,000		402,000
	Construction	—				—				—			—		—
	Home equity line of credit	1,164,000				1,395,000				—			1,447,000		29,000
	Consumer	26,000				28,000				—			11,000		3,000
		$	26,313,000			$	29,077,000			$	—		$	26,926,000	$	1,078,000
	With an Allowance Recorded
	Commercial
	Real estate	$	1,617,000			$	1,789,000			$	346,000		$	3,040,000	$	62,000
	Construction	1,380,000				1,380,000				413,000			1,279,000		56,000
	Other	326,000				338,000				129,000			1,103,000		13,000
	Municipal	—				—				—			—		—
	Residential
	Term	5,303,000				5,513,000				519,000			5,738,000		239,000
	Construction	—				—				—			—		—
	Home equity line of credit	923,000				929,000				396,000			318,000		17,000
	Consumer	—				—				—			—		—
		$	9,549,000			$	9,949,000			$	1,803,000		$	11,478,000	$	387,000
	Total
	Commercial
	Real estate	$	13,304,000			$	14,212,000			$	346,000		$	14,120,000	$	550,000
	Construction	1,380,000				1,380,000				413,000			1,309,000		56,000
	Other	2,942,000				3,745,000				129,000			4,956,000		169,000
	Municipal	—				—				—			—		—
	Residential
	Term	16,123,000				17,337,000				519,000			16,243,000		641,000
	Construction	—				—				—			—		—
	Home equity line of credit	2,087,000				2,324,000				396,000			1,765,000		46,000
	Consumer	26,000				28,000				—			11,000		3,000
		$	35,862,000			$	39,026,000			$	1,803,000		$	38,404,000	$	1,465,000
	Substantially all interest income recognized on impaired loans for all classes of financing receivables was recognized on a cash basis as received.
	A breakdown of impaired loans by category as of December 31, 2013, is presented in the following table:
		Recorded Investment				Unpaid				Related Allowance			Average		Recognized Interest
						Principal Balance							Recorded Investment		Income
	With No Related Allowance
	Commercial
	Real estate	$	11,813,000			$	12,419,000			$	—		$	11,100,000	$	495,000
	Construction	—				—				—			202,000		—
	Other	5,617,000				7,309,000				—			4,265,000		322,000
	Municipal	—				—				—			—		—
	Residential
	Term	13,432,000				14,600,000				—			14,396,000		511,000
	Construction	—				—				—			—		—
	Home equity line of credit	1,555,000				1,791,000				—			1,578,000		32,000
	Consumer	—				—				—			—		—
		$	32,417,000			$	36,119,000			$	—		$	31,541,000	$	1,360,000
	With an Allowance Recorded
	Commercial
	Real estate	$	3,122,000			$	3,264,000			$	890,000		$	5,673,000	$	150,000
	Construction	1,284,000				1,284,000				272,000			1,795,000		48,000
	Other	1,081,000				1,132,000				841,000			1,633,000		28,000
	Municipal	—				—				—			—		—
	Residential
	Term	4,354,000				4,516,000				404,000			4,982,000		162,000
	Construction	—				—				—			—		—
Home equity line of credit	93,000				93,000				54,000			98,000		2,000
Consumer	—				—				—			—		—
	$	9,934,000			$	10,289,000			$	2,461,000		$	14,181,000	$	390,000
Total
Commercial
Real estate	$	14,935,000			$	15,683,000			$	890,000		$	16,773,000	$	645,000
Construction	1,284,000				1,284,000				272,000			1,997,000		48,000
Other	6,698,000				8,441,000				841,000			5,898,000		350,000
Municipal	—				—				—			—		—
Residential
Term	17,786,000				19,116,000				404,000			19,378,000		673,000
Construction	—				—				—			—		—
Home equity line of credit	1,648,000				1,884,000				54,000			1,676,000		34,000
Consumer	—				—				—			—		—
	$	42,351,000			$	46,408,000			$	2,461,000		$	45,722,000	$	1,750,000
A breakdown of impaired loans by category as of December 31, 2012, is presented in the following table:
	Recorded Investment				Unpaid				Related Allowance			Average		Recognized Interest
					Principal Balance							Recorded Investment		Income
With No Related Allowance
Commercial
Real estate	$	9,386,000			$	9,963,000			$	—		$	10,102,000	$	199,000
Construction	101,000				115,000				—			2,533,000		—
Other	4,737,000				5,345,000				—			2,877,000		53,000
Municipal	—				—				—			—		—
Residential
Term	12,747,000				14,440,000				—			9,801,000		189,000
Construction	—				—				—			560,000		—
Home equity line of credit	1,311,000				1,440,000				—			961,000		27,000
Consumer	—				—				—			3,000		—
	$	28,282,000			$	31,303,000			$	—		$	26,837,000	$	468,000
With an Allowance Recorded
Commercial
Real estate	$	6,388,000			$	7,018,000			$	1,523,000		$	4,614,000	$	211,000
Construction	3,253,000				3,253,000				969,000			1,816,000		85,000
Other	1,124,000				1,126,000				652,000			1,974,000		38,000
Municipal	—				—				—			—		—
Residential
Term	6,697,000				6,842,000				395,000			9,066,000		237,000
Construction	—				—				—			261,000		—
Home equity line of credit	—				—				—			442,000		—
Consumer	—				—				—			9,000		—
	$	17,462,000			$	18,239,000			$	3,539,000		$	18,182,000	$	571,000
Total
Commercial
Real estate	$	15,774,000			$	16,981,000			$	1,523,000		$	14,716,000	$	410,000
Construction	3,354,000				3,368,000				969,000			4,349,000		85,000
Other	5,861,000				6,471,000				652,000			4,851,000		91,000
Municipal	—				—				—			—		—
Residential
Term	19,444,000				21,282,000				395,000			18,867,000		426,000
Construction	—				—				—			821,000		—
Home equity line of credit	1,311,000				1,440,000				—			1,403,000		27,000
Consumer	—				—				—			12,000		—
	$	45,744,000			$	49,542,000			$	3,539,000		$	45,019,000	$	1,039,000
Troubled Debt Restructurings on Financing Receivables	The following table shows TDRs by class and the specific reserve as of December 31, 2014:
		Number of Loans			Balance				Specific Reserves
	Commercial
	Real estate	19			$	12,282,000			$	267,000
	Construction	1			1,172,000				207,000
	Other	15			2,007,000				—
	Municipal	—			—				—
	Residential
	Term	54			10,932,000				373,000
	Construction	—			—				—
	Home equity line of credit	5			821,000				21,000
	Consumer	—			—				—
		94			$	27,214,000			$	868,000
	The following table shows TDRs by class and the specific reserve as of December 31, 2013:
		Number of Loans			Balance				Specific Reserves
	Commercial
	Real estate	20			$	13,018,000			$	433,000
	Construction	1			1,284,000				274,000
	Other	20			2,734,000				100,000
	Municipal	—			—				—
	Residential
	Term	53			11,220,000				210,000
	Construction	—			—				—
	Home equity line of credit	5			842,000				—
	Consumer	—			—				—
		99			$	29,098,000			$	1,017,000
	As of December 31, 2014, 12 of the loans classified as TDRs with a total balance of $1,549,000 were more than 30 days past due. Of these loans, two loans with an outstanding balance of $238,000 had been placed on TDR status in the previous 12 months. The following table shows past-due TDRs by class and the associated specific reserves included in the allowance for loan losses as of December 31, 2014:
		Number of Loans			Balance				Specific Reserves
	Commercial
	Real estate	1			$	321,000			$	120,000
	Construction	—			—				—
	Other	1			2,000				—
	Municipal	—			—				—
	Residential
	Term	8			1,000,000				36,000
	Construction	—			—				—
	Home equity line of credit	2			226,000				21,000
	Consumer	—			—				—
		12			$	1,549,000			$	177,000
	As of December 31, 2013, 16 of the loans classified as TDRs with a total balance of $3,261,000 were more than 30 days past due. Of these loans, six loans with an outstanding balance of $810,000 had been placed on TDR status in the previous 12 months. The following table shows past-due TDRs by class and the associated specific reserves included in the allowance for loan losses as of December 31, 2013:
		Number of Loans			Balance				Specific Reserves
	Commercial
	Real estate	2			$	990,000			$	—
	Construction	—			—				—
	Other	2			355,000				—
	Municipal	—			—				—
	Residential
	Term	10			1,688,000				37,000
	Construction	—			—				—
	Home equity line of credit	2			228,000				—
	Consumer	—			—				—
		16			$	3,261,000			$	37,000
	During the year ended December 31, 2014, six loans were placed on TDR status with a post-modification outstanding balance of $826,000. These were considered TDRs because concessions had been granted to borrowers experiencing financial difficulties. Concessions include reductions in interest rates, principal and/or interest forbearance, payment extensions, or combinations thereof.  The following table shows loans placed on TDR status during the year ended December 31, 2014, by class of loan and the associated specific reserve included in the allowance for loan losses as of December 31, 2014:
		Number of Loans			Pre-Modification				Post-Modification Outstanding			Specific Reserves
					Outstanding				Recorded
					Recorded Investment				Investment
	Commercial
	Real estate	2			$	302,000			$	300,000		$	—
	Construction	—			—				—			—
	Other	—			—				—			—
	Municipal	—			—				—			—
	Residential
	Term	4			627,000				526,000			12,000
	Construction	—			—				—			—
Home equity line of credit	—			—				—			—
Consumer	—			—				—			—
	6			$	929,000			$	826,000		$	12,000
During the year ended December 31, 2013, 10 loans were placed on TDR status with a post-modification balance of $3,604,000. These were considered to be TDRs because concessions had been granted to borrowers experiencing financial difficulties. Concessions include reductions in interest rates, principal and/or interest forbearance, payment extensions, or combinations thereof. The following table shows loans placed on TDR status in 2013 by type of loan and the associated specific reserve included in the allowance for loan losses as of December 31, 2013:
	Number of Loans			Pre-Modification				Post-Modification Outstanding			Specific Reserves
				Outstanding				Recorded
				Recorded Investment				Investment
Commercial
Real estate	2			$	1,883,000			$	1,883,000		$	—
Construction	—			—				—			—
Other	2			491,000				491,000			—
Municipal	—			—				—			—
Residential
Term	5			1,032,000				1,029,000			31,000
Construction	—			—				—			—
Home equity line of credit	1			204,000				201,000			—
Consumer	—			—				—			—
	10			$	3,610,000			$	3,604,000		$	31,000

Allowance_for_Loan_Losses_Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2014
Allowance for Loan and Lease Losses, Adjustments, Net [Abstract]
Allowance for loan losses by class of financing receivable and allowance	The following table summarizes the composition of the allowance for loan losses, by class of financing receivable and allowance, as of December 31, 2014 and 2013:
	As of December 31,	2014			2013
	Allowance for Loans Evaluated Individually for Impairment
	Commercial
	Real estate	$	346,000		$	890,000
	Construction	413,000			272,000
	Other	129,000			841,000
	Municipal	—			—
	Residential
	Term	519,000			404,000
	Construction	—			—
	Home equity line of credit	396,000			54,000
	Consumer	—			—
	Total	$	1,803,000		$	2,461,000
	Allowance for Loans Evaluated Collectively for Impairment
	Commercial
	Real estate	$	3,186,000		$	3,712,000
	Construction	410,000			303,000
	Other	1,376,000			1,435,000
	Municipal	15,000			15,000
	Residential
	Term	666,000			695,000
	Construction	20,000			21,000
	Home equity line of credit	664,000			621,000
	Consumer	542,000			573,000
	Unallocated	1,662,000			1,678,000
	Total	$	8,541,000		$	9,053,000
	Total Allowance for Loan Losses
	Commercial
	Real estate	$	3,532,000		$	4,602,000
	Construction	823,000			575,000
	Other	1,505,000			2,276,000
	Municipal	15,000			15,000
	Residential
	Term	1,185,000			1,099,000
	Construction	20,000			21,000
	Home equity line of credit	1,060,000			675,000
	Consumer	542,000			573,000
	Unallocated	1,662,000			1,678,000
	Total	$	10,344,000		$	11,514,000
Loan losses by loan segment and allowance element	A breakdown of the allowance for loan losses as of December 31, 2014 and 2013, by class of financing receivable and allowance element, is presented in the following tables:
	As of December 31, 2014	Specific Reserves on Loans Evaluated Individually for Impairment			General Reserves on Loans Based on Historical Loss Experience		Reserves for Qualitative Factors			Unallocated Reserves			Total Reserves
	Commercial
	Real estate	$	346,000		$	1,444,000	$	1,742,000		$	—		$	3,532,000
	Construction	413,000			186,000		224,000			—			823,000
	Other	129,000			624,000		752,000			—			1,505,000
	Municipal	—			—		15,000			—			15,000
	Residential
	Term	519,000			297,000		369,000			—			1,185,000
	Construction	—			9,000		11,000			—			20,000
	Home equity line of credit	396,000			376,000		288,000			—			1,060,000
	Consumer	—			346,000		196,000			—			542,000
	Unallocated	—			—		—			1,662,000			1,662,000
		$	1,803,000		$	3,282,000	$	3,597,000		$	1,662,000		$	10,344,000
	As of December 31, 2013	Specific Reserves on Loans Evaluated Individually for Impairment			General Reserves on Loans Based on Historical Loss Experience		Reserves for Qualitative Factors			Unallocated Reserves			Total Reserves
	Commercial
	Real estate	$	890,000		$	1,927,000	$	1,785,000		$	—		$	4,602,000
	Construction	272,000			157,000		146,000			—			575,000
	Other	841,000			745,000		690,000			—			2,276,000
	Municipal	—			—		15,000			—			15,000
	Residential
	Term	404,000			342,000		353,000			—			1,099,000
	Construction	—			10,000		11,000			—			21,000
	Home equity line of credit	54,000			343,000		278,000			—			675,000
	Consumer	—			382,000		191,000			—			573,000
	Unallocated	—			—		—			1,678,000			1,678,000
		$	2,461,000		$	3,906,000	$	3,469,000		$	1,678,000		$	11,514,000
Summary of Risk Ratings for Loans	The following table summarizes the risk ratings for the Company's commercial construction, commercial real estate, commercial other and municipal loans as of December 31, 2014:
		Commercial			Commercial		Commercial			Municipal			All Risk-
		Real Estate			Construction		Other			Loans			Rated Loans
	1 Strong	$	12,000		$	—	$	330,000		$	—		$	342,000
	2 Above average	12,668,000			771,000		7,210,000			18,789,000			39,438,000
	3 Satisfactory	50,275,000			1,983,000		24,232,000			1,635,000			78,125,000
	4 Average	108,719,000			23,345,000		44,895,000			—			176,959,000
	5 Watch	36,974,000			1,567,000		18,171,000			—			56,712,000
	6 OAEM	9,846,000			2,519,000		1,970,000			—			14,335,000
	7 Substandard	23,817,000			747,000		7,723,000			—			32,287,000
	8 Doubtful	—			—		—			—			—
	Total	$	242,311,000		$	30,932,000	$	104,531,000		$	20,424,000		$	398,198,000
	The following table summarizes the risk ratings for the Company's commercial construction, commercial real estate, commercial other and municipal loans as of December 31, 2013:
		Commercial			Commercial		Commercial			Municipal			All Risk-
		Real Estate			Construction		Other			Loans			Rated Loans
	1 Strong	$	16,000		$	—	$	265,000		$	—		$	281,000
	2 Above average	14,565,000			804,000		6,719,000			16,230,000			38,318,000
	3 Satisfactory	45,213,000			871,000		14,852,000			2,887,000			63,823,000
	4 Average	100,343,000			14,938,000		45,792,000			—			161,073,000
	5 Watch	32,326,000			26,000		10,439,000			—			42,791,000
	6 OAEM	26,102,000			2,948,000		3,238,000			—			32,288,000
	7 Substandard	27,115,000			795,000		13,622,000			—			41,532,000
	8 Doubtful	263,000			—		362,000			—			625,000
	Total	$	245,943,000		$	20,382,000	$	95,289,000		$	19,117,000		$	380,731,000
Allowance for Loan Losses Transactions	Allowance for loan losses activity for the years ended December 31, 2014, 2013 and 2012 was as follows:
	For the year ended December 31, 2014	Commercial											Residential					Home Equity
		Real Estate			Construction		Other			Municipal			Term		Construction			Line of Credit		Consumer		Unallocated			Total
	Allowance for loan losses:
	Beginning balance	$	4,602,000		$	575,000	$	2,276,000		$	15,000		$	1,099,000	$	21,000		$	675,000	$	573,000	$	1,678,000		$	11,514,000
	Chargeoffs	1,205,000			—		989,000			—			699,000		—			153,000		449,000		—			3,495,000
	Recoveries	144,000			—		758,000			—			36,000		25,000			16,000		196,000		—			1,175,000
	Provision (credit)	(9,000		)	248,000		(540,000		)	—			749,000		(26,000		)	522,000		222,000		(16,000		)	1,150,000
	Ending balance	$	3,532,000		$	823,000	$	1,505,000		$	15,000		$	1,185,000	$	20,000		$	1,060,000	$	542,000	$	1,662,000		$	10,344,000
	Ending balance specifically evaluated for impairment	$	346,000		$	413,000	$	129,000		$	—		$	519,000	$	—		$	396,000	$	—	$	—		$	1,803,000
	Ending balance collectively evaluated for impairment	$	3,186,000		$	410,000	$	1,376,000		$	15,000		$	666,000	$	20,000		$	664,000	$	542,000	$	1,662,000		$	8,541,000
	Related loan balances:
	Ending balance	$	242,311,000		$	30,932,000	$	104,531,000		$	20,424,000		$	384,032,000	$	12,160,000		$	103,521,000	$	19,653,000	$	—		$	917,564,000
	Ending balance specifically evaluated for impairment	$	13,304,000		$	1,380,000	$	2,942,000		$	—		$	16,123,000	$	—		$	2,087,000	$	26,000	$	—		$	35,862,000
	Ending balance collectively evaluated for impairment	$	229,007,000		$	29,552,000	$	101,589,000		$	20,424,000		$	367,909,000	$	12,160,000		$	101,434,000	$	19,627,000	$	—		$	881,702,000
	For the year ended December 31, 2013	Commercial											Residential					Home Equity
		Real Estate			Construction		Other			Municipal			Term		Construction			Line of Credit		Consumer		Unallocated			Total
	Allowance for loan losses:
	Beginning balance	$	5,865,000		$	1,359,000	$	2,050,000		$	18,000		$	1,109,000	$	11,000		$	654,000	$	592,000	$	842,000		$	12,500,000
	Chargeoffs	150,000			963,000		2,583,000			—			1,118,000		—			611,000		430,000		—			5,855,000
	Recoveries	—			—		359,000			—			103,000		—			24,000		183,000		—			669,000
	Provision (credit)	(1,113,000		)	179,000		2,450,000			(3,000		)	1,005,000		10,000			608,000		228,000		836,000			4,200,000
	Ending balance	$	4,602,000		$	575,000	$	2,276,000		$	15,000		$	1,099,000	$	21,000		$	675,000	$	573,000	$	1,678,000		$	11,514,000
	Ending balance specifically evaluated for impairment	$	890,000		$	272,000	$	841,000		$	—		$	404,000	$	—		$	54,000	$	—	$	—		$	2,461,000
	Ending balance collectively evaluated for impairment	$	3,712,000		$	303,000	$	1,435,000		$	15,000		$	695,000	$	21,000		$	621,000	$	573,000	$	1,678,000		$	9,053,000
	Related loan balances:
	Ending balance	$	245,943,000		$	20,382,000	$	95,289,000		$	19,117,000		$	377,218,000	$	11,803,000		$	91,549,000	$	15,066,000	$	—		$	876,367,000
	Ending balance specifically evaluated for impairment	$	14,935,000		$	1,284,000	$	6,698,000		$	—		$	17,786,000	$	—		$	1,648,000	$	—	$	—		$	42,351,000
	Ending balance collectively evaluated for impairment	$	231,008,000		$	19,098,000	$	88,591,000		$	19,117,000		$	359,432,000	$	11,803,000		$	89,901,000	$	15,066,000	$	—		$	834,016,000
	For the year ended December 31, 2012	Commercial											Residential					Home Equity
		Real Estate			Construction		Other			Municipal			Term		Construction			Line of Credit		Consumer		Unallocated			Total
	Allowance for loan losses:
	Beginning balance	$	5,659,000		$	658,000	$	2,063,000		$	19,000		$	1,159,000	$	255,000		$	595,000	$	584,000	$	2,008,000		$	13,000,000
	Chargeoffs	1,394,000			928,000		3,215,000			—			1,911,000		389,000			688,000		555,000		—			9,080,000
	Recoveries	13,000			246,000		113,000			—			110,000		54,000			1,000		208,000		—			745,000
	Provision (credit)	1,587,000			1,383,000		3,089,000			(1,000		)	1,751,000		91,000			746,000		355,000		(1,166,000		)	7,835,000
	Ending balance	$	5,865,000		$	1,359,000	$	2,050,000		$	18,000		$	1,109,000	$	11,000		$	654,000	$	592,000	$	842,000		$	12,500,000
	Ending balance specifically evaluated for impairment	$	1,523,000		$	969,000	$	652,000		$	—		$	395,000	$	—		$	—	$	—	$	—		$	3,539,000
	Ending balance collectively evaluated for impairment	$	4,342,000		$	390,000	$	1,398,000		$	18,000		$	714,000	$	11,000		$	654,000	$	592,000	$	842,000		$	8,961,000
	Related loan balances:
	Ending balance	$	251,335,000		$	22,417,000	$	81,183,000		$	14,704,000		$	379,447,000	$	6,459,000		$	99,082,000	$	14,657,000	$	—		$	869,284,000
	Ending balance specifically evaluated for impairment	$	15,774,000		$	3,354,000	$	5,861,000		$	—		$	19,444,000	$	—		$	1,311,000	$	—	$	—		$	45,744,000
	Ending balance collectively evaluated for impairment	$	235,561,000		$	19,063,000	$	75,322,000		$	14,704,000		$	360,003,000	$	6,459,000		$	97,771,000	$	14,657,000	$	—		$	823,540,000

Premises_and_Equipment_Tables

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and equipment are carried at cost and consist of the following:
	As of December 31,	2014		2013
	Land	$	4,532,000	$	4,532,000
	Land improvements	821,000		799,000
	Buildings	20,481,000		19,668,000
	Equipment	10,610,000		12,196,000
		36,444,000		37,195,000
	Less accumulated depreciation	13,825,000		13,579,000
		$	22,619,000	$	23,616,000

Other_Real_Estate_Owned_Tables

Other Real Estate Owned (Tables)	12 Months Ended
	Dec. 31, 2014
Real Estate Owned, Disclosure of Detailed Components [Abstract]
Other Real Estate Owned	The following summarizes other real estate owned:
	As of  December 31,	2014			2013
	Real estate acquired in settlement of loans	$	3,785,000		$	4,807,000
Change in Allowance for Losses from Other Real Estate Owned	Changes in the allowance for losses from other real estate owned were as follows:
	For the years ended December 31,	2014			2013			2012
	Balance at beginning of year	$	330,000		$	373,000		$	436,000
	Losses charged to allowance	(313,000		)	(544,000		)	(460,000		)
	Provision charged to operating expenses	637,000			501,000			397,000
	Balance at end of year	$	654,000		$	330,000		$	373,000

Acquisitions_and_Intangible_As1

Acquisitions and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Schedule of finite-lived intangible assets acquired as part of business combination	As of December 31, 2014, the amortization expense related to the core deposit intangibles, absent any future impairment, is expected to be as follows:
	2015	$	57,000
	2016	43,000
	2017	43,000
	2018	43,000
	2019	43,000
	Thereafter	131,000
	Total	$	360,000

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current and Deferred Components of Income Tax Expense	The current and deferred components of income tax expense (benefit) were as follows:
	For the years ended December 31,	2014			2013			2012
	Federal income tax
	Current	$	4,282,000		$	3,234,000		$	3,239,000
	Deferred	18,000			(56,000		)	(108,000		)
		4,300,000			3,178,000			3,131,000
	State franchise tax	266,000			247,000			240,000
		$	4,566,000		$	3,425,000		$	3,371,000
Actual Tax Expense from Expected Tax Expense	The actual tax expense differs from the expected tax expense (computed by applying the applicable U.S. Federal corporate income tax rate to income before income taxes) as follows:
	For the years ended December 31,	2014			2013			2012
	Expected tax expense	$	6,746,000		$	5,736,000		$	5,621,000
	Non-taxable income	(2,292,000		)	(2,326,000		)	(2,096,000		)
	State franchise tax, net of federal tax benefit	173,000			160,000			156,000
	Tax credits	(414,000		)	(414,000		)	(414,000		)
	Other	353,000			269,000			104,000
		$	4,566,000		$	3,425,000		$	3,371,000
Components of Deferred Tax Assets and Liabilities	Items that give rise to the deferred income tax assets and liabilities and the tax effect of each at December 31, 2014 and 2013 are as follows:
		2014			2013
	Allowance for loan losses	$	3,620,000		$	4,030,000
	OREO	229,000			116,000
	Accrued pension and post-retirement	1,725,000			1,334,000
	Unrealized loss on securities available for sale	—			3,549,000
	Goodwill	138,000			206,000
	Unrealized loss on securities transferred from available for sale to held to maturity	26,000			—
	Tax credits, carried forward	—			539,000
	Restricted stock grants	264,000			113,000
	Core deposit intangible	5,000			—
	Other assets	48,000			50,000
	Total deferred tax asset	6,055,000			9,937,000
	Net deferred loan costs	(1,120,000		)	(884,000		)
	Depreciation	(2,131,000		)	(2,672,000		)
	Unrealized gain on securities available for sale	(1,358,000		)	—
	Mortgage servicing rights	(380,000		)	(405,000		)
	Core deposit intangible	—			(99,000		)
	Investment in flow through entities	(387,000		)	(361,000		)
	Prepaid expense	(210,000		)	(316,000		)
	Total deferred tax liability	(5,586,000		)	(4,737,000		)
	Net deferred tax asset	$	469,000		$	5,200,000

Certificates_of_Deposit_Tables

Certificates of Deposit (Tables)	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Certificates of deposit	The following table represents the breakdown of certificates of deposit at December 31, 2014 and 2013:
		December 31, 2014		December 31, 2013
	Certificates of deposit < $100,000	$	184,471,000	$	210,321,000
	Certificates $100,000 to $250,000	221,892,000		278,674,000
	Certificates $250,000 and over	41,138,000		42,124,000
		$	447,501,000	$	531,119,000
Maturities of certificates of deposit	At December 31, 2014, the scheduled maturities of certificates of deposit are as follows:
	Year of Maturity	Less than $100,000		$100,000 and Greater		All Certificates of Deposit
	2015	$	134,198,000	$	206,251,000	$	340,449,000
	2016	19,757,000		15,565,000		35,322,000
	2017	8,261,000		8,173,000		16,434,000
	2018	7,476,000		14,160,000		21,636,000
	2019	14,514,000		18,376,000		32,890,000
	2020 and thereafter	265,000		505,000		770,000
		$	184,471,000	$	263,030,000	$	447,501,000

Borrowed_Funds_Tables

Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2014
Borrowed Funds [Abstract]
Range of Interest Rates and Maturity Dates of Borrowed Funds	Borrowed funds at December 31, 2014 and 2013 have the following range of interest rates and maturity dates:
	As of December 31, 2014
	Federal Home Loan Bank Advances
	2015	0.22% - 2.98%	$	115,050,000
	2016	2.36% - 2.44%	30,000,000
	2017	0.99% - 3.69%	30,000,000
	2018	2.25% - 3.25%	30,000,000
	2019	0.00%	—
	2020 and thereafter	0.00%	141,000
			205,191,000
	Repurchase agreements
	Municipal and commercial customers	0.20% - 1.89%	74,725,000
			$	279,916,000
	As of December 31, 2013
	Federal Home Loan Bank Advances
	2014	0.28%-3.20%	$	54,500,000
	2015	2.03%-2.98%	40,000,000
	2016	2.36%-2.44%	30,000,000
	2017	0.99%-3.69%	30,000,000
	2018	2.25%-3.25%	30,000,000
	2019 and thereafter	0.00%	148,000
			184,648,000
	Repurchase agreements
	Municipal and commercial customers	0.20%-1.89%	94,477,000
			$	279,125,000

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2014
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Accumulated post-retirement benefit obligation, funded status, net periodic benefit cost and assumptions used	The following table sets forth the accumulated postretirement benefit obligation and funded status:
	At December 31,	2014			2013			2012
	Change in benefit obligations
	Benefit obligation at beginning of year:	$	1,479,000		$	1,954,000		$	1,848,000
	Service cost	—			21,000			16,000
	Interest cost	71,000			86,000			107,000
	Benefits paid	(100,000		)	(107,000		)	(103,000		)
	Actuarial (gain) loss	478,000			(475,000		)	86,000
	Benefit obligation at end of year:	$	1,928,000		$	1,479,000		$	1,954,000
	Funded status
	Benefit obligation at end of year	$	(1,928,000	)	$	(1,479,000	)	$	(1,954,000	)
	Unamortized (gain) loss	192,000			(289,000		)	186,000
	Unrecognized transition obligation	—			—			5,000
	Accrued benefit cost	$	(1,736,000	)	$	(1,768,000	)	$	(1,763,000	)
	Weighted average discount rate as of December 31	4.25		%	5		%	4.5		%
Schedule of net benefit costs	The following table sets forth the net periodic pension cost:
	For the years ended December 31,	2014			2013			2012
	Components of net periodic benefit cost
	Service cost	$	—		$	21,000		$	16,000
	Interest cost	71,000			86,000			107,000
	Amortization of unrecognized transition obligation	—			5,000			29,000
	Amortization of gain	(12,000		)	—			—
	Other settlement expense	10,000			—			—
	Net periodic benefit cost	$	69,000		$	112,000		$	152,000
	Weighted average discount rate for net periodic cost	5		%	4.5		%	6.5		%
Schedule of net periodic benefit cost not yet recognized	In accordance with FASB ASC Topic 715, "Compensation – Retirement Benefits", amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income (loss) are as follows:
	At December 31,	2014			2013			Portion to Be Recognized in
								Income in 2015
	Unamortized net actuarial gain (loss)	$	(192,000	)	$	289,000		$	—
	Deferred tax benefit (expense) at 35%	67,000			(101,000		)	—
	Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss)	$	(125,000	)	$	188,000		$	—

Other_Comprehensive_Income_Los1

Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table summarizes activity in the unrealized gain or loss on available for sale securities included in other comprehensive income (loss) for the years ended December 31, 2014, 2013 and 2012.
	For the years ended December 31,	2014				2013				2012
	Balance at beginning of year	$	(6,591,000	)		$	7,940,000			$	7,401,000
	Unrealized gains (losses) arising during the period	15,175,000				(21,268,000		)		2,797,000
	Realized gains during the period	(1,155,000		)		(1,087,000		)		(1,968,000		)
	Related deferred taxes	(4,907,000		)		7,824,000				(290,000		)
	Net change	9,113,000				(14,531,000		)		539,000
	Balance at end of year	$	2,522,000			$	(6,591,000	)		$	7,940,000
	The following table summarizes activity in the unrealized loss on securities transferred from available for sale to held to maturity included in other comprehensive income (loss) for the years ended December 31, 2014, 2013, and 2012.
	For the years ended December 31,	2014			2013			2012
	Balance at beginning of period	$	—		$	—		$	—
	Net unrealized losses transferred during the period	(23,000		)	—			—
	Amortization of net unrealized losses	(51,000		)	—			—
	Related deferred taxes	26,000			—			—
	Net change	(48,000		)	—			—
	Balance at end of period	$	(48,000	)	$	—		$	—
	The following table summarizes activity in the unrealized gain or loss on postretirement benefits included in other comprehensive income (loss) for the years ended December 31, 2014, 2013, and 2012:
	For the years ended December 31,	2014				2013				2012
	Unrecognized postretirement benefits  at beginning of period	$	188,000			$	(123,000	)		$	(87,000	)
	Amortization of unrecognized transition obligation	—				5,000				29,000
	Change in unamortized net actuarial gain (loss)	(481,000		)		475,000				(86,000		)
	Related deferred taxes	168,000				(169,000		)		21,000
	Unrecognized postretirement benefits at end of period	$	(125,000	)		$	188,000			$	(123,000	)
	The following table summarizes activity in the unrealized loss on securities transferred from available for sale to held to maturity included in other comprehensive income (loss) for the years ended December 31, 2014, 2013, and 2012.
	For the years ended December 31,	2014			2013			2012
	Balance at beginning of period	$	—		$	—		$	—
	Net unrealized losses transferred during the period	(23,000		)	—			—
	Amortization of net unrealized losses	(51,000		)	—			—
	Related deferred taxes	26,000			—			—
	Net change	(48,000		)	—			—
	Balance at end of period	$	(48,000	)	$	—		$	—
	The following table summarizes activity in the unrealized gain or loss on available for sale securities included in other comprehensive income (loss) for the years ended December 31, 2014, 2013 and 2012.
	For the years ended December 31,	2014				2013				2012
	Balance at beginning of year	$	(6,591,000	)		$	7,940,000			$	7,401,000
	Unrealized gains (losses) arising during the period	15,175,000				(21,268,000		)		2,797,000
	Realized gains during the period	(1,155,000		)		(1,087,000		)		(1,968,000		)
	Related deferred taxes	(4,907,000		)		7,824,000				(290,000		)
	Net change	9,113,000				(14,531,000		)		539,000
	Balance at end of year	$	2,522,000			$	(6,591,000	)		$	7,940,000

Stock_Options_and_StockBased_C1

Stock Options and Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	As of December 31, 2014, 72,684 shares of restricted stock had been granted under the 2010 Plan, as detailed in the following table:
	Year	Vesting Term	Shares	Remaining Term
	Granted	(In Years)		(In Years)
	2011	4	1,500	0.1
	2011	5	5,500	1.1
	2012	3	2,027	0.2
	2012	4	2,704	1.2
	2012	5	7,996	2.2
	2013	2	8,530	0.1
	2013	3	3,808	1.1
	2013	5	14,776	3.1
	2014	1	5,086	0.1
	2014	2	10,335	1
	2014	5	10,422	4
			72,684	1.9
Schedule of Share-based Compensation, Stock Options, Activity	A summary of the status of outstanding stock options as of December 31, 2014 and changes during the year then ended, is presented below.
		Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (In years)	Aggregate Intrinsic
							Value
	Outstanding at December 31, 2013	42,000		$	18
	Granted in 2014	—		—
	Exercised in 2014	—		—			—
	Forfeited in 2014	—		—
	Outstanding at December 31, 2014	42,000		$	18	0.1	—
	Exercisable at December 31, 2014	42,000		$	18	0.1	—

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Basic and diluted earnings per share (EPS)	The following table provides detail for basic earnings per share (EPS) and diluted earnings per share for the years ended December 31, 2014, 2013 and 2012:
		Income			Shares	Per-Share
		(Numerator)			(Denominator)	Amount
	For the year ended December 31, 2014
	Net income as reported	$	14,709,000
	Less dividends and amortization of premium on preferred stock	—
	Basic EPS: Income available to common shareholders	14,709,000			10,638,527	$	1.38
	Effect of dilutive securities: warrants and restricted stock				72,337
	Diluted EPS: Income available to common shareholders plus assumed conversions	$	14,709,000		10,710,864	$	1.37
	For the year ended December 31, 2013
	Net income as reported	$	12,965,000
	Less dividends and amortization of premium on preferred stock	384,000
	Basic EPS: Income available to common shareholders	12,581,000			10,469,446	$	1.2
	Effect of dilutive securities: warrants and restricted stock				51,609
	Diluted EPS: Income available to common shareholders plus assumed conversions	$	12,581,000		10,521,055	$	1.2
	For the year ended December 31, 2012
	Net income as reported	$	12,688,000
	Less dividends and amortization of premium on preferred stock	723,000
	Basic EPS: Income available to common shareholders	11,965,000			9,828,925	$	1.22
	Effect of dilutive securities: restricted stock				17,606
	Diluted EPS: Income available to common shareholders plus assumed conversions	$	11,965,000		9,846,531	$	1.22
Number of options and warrants outstanding and amount above or below the strike price	The following table presents the number of options and warrants outstanding as of December 31, 2014, 2013 and 2012 and the amount which are above or below the strike price:
		Outstanding		In-the-Money	Out-of-the-Money
	As of December 31, 2014
	Incentive stock options	42,000		—	42,000
	Warrants issued to U.S. Treasury	225,904		225,904	—
	Total dilutive securities	267,904		225,904	42,000
	As of December 31, 2013
	Incentive stock options	42,000		—	42,000
	Warrants issued to U.S. Treasury	225,904		225,904	—
	Total dilutive securities	267,904		225,904	42,000
	As of December 31, 2012
	Incentive stock options	42,000		—	42,000
	Warrants issued to U.S. Treasury	225,904		—	225,904
	Total dilutive securities	267,904		—	267,904

Regulatory_Capital_Requirement1

Regulatory Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2014
Regulatory Capital Requirements [Abstract]
The actual and minimum capital amounts and ratios	The actual and minimum capital amounts and ratios for the Bank are presented in the following table:
		Actual			For capital			To be well-capitalized
					adequacy			under prompt corrective
					purposes			action provisions
	As of December 31, 2014
	Tier 2 capital to	$	137,818,000		$	68,524,000		$	85,655,000
	risk-weighted assets	16.09		%	8		%	10		%
	Tier 1 capital to	$	127,374,000		$	34,262,000		$	51,393,000
	risk-weighted assets	14.87		%	4		%	6		%
	Tier 1 capital to	$	127,374,000		$	58,086,000		$	72,607,000
	average assets	8.77		%	4		%	5		%
	As of December 31, 2013
	Tier 2 capital to	$	131,146,000		$	65,996,000		$	82,495,000
	risk-weighted assets	15.9		%	8		%	10		%
	Tier 1 capital to	$	120,819,000		$	32,998,000		$	49,497,000
	risk-weighted assets	14.65		%	4		%	6		%
	Tier 1 capital to	$	120,819,000		$	57,203,000		$	71,504,000
	average assets	8.45		%	4		%	5		%
	The actual and minimum capital amounts and ratios for the Company, on a consolidated basis, are presented in the following table:
		Actual			For capital			To be well-capitalized
					adequacy			under prompt corrective
					purposes			action provisions
	As of December 31, 2014
	Tier 2 capital to	$	139,414,000		$	68,532,000		n/a
	risk-weighted assets	16.27		%	8		%	n/a
	Tier 1 capital to	$	128,970,000		$	34,266,000		n/a
	risk-weighted assets	15.06		%	4		%	n/a
	Tier 1 capital to	$	128,970,000		$	58,066,000		n/a
	average assets	8.88		%	4		%	n/a
	As of December 31, 2013
	Tier 2 capital to	$	132,294,000		$	66,005,000		n/a
	risk-weighted assets	16.03		%	8		%	n/a
	Tier 1 capital to	$	121,967,000		$	33,002,000		n/a
	risk-weighted assets	14.78		%	4		%	n/a
	Tier 1 capital to	$	121,967,000		$	56,280,000		n/a
	average assets	8.67		%	4		%	n/a

OffBalanceSheet_Financial_Inst1

Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Off-Balance-Sheet Financial instruments	At December 31, 2014 and 2013, the Bank had the following off-balance-sheet financial instruments, whose contract amounts represent credit risk:
	As of December 31,	2014		2013
	Unused lines, collateralized by residential real estate	$	65,264,000	$	58,265,000
	Other unused commitments	49,608,000		48,646,000
	Standby letters of credit	4,480,000		4,086,000
	Commitments to extend credit	13,593,000		7,224,000
	Total	$	132,945,000	$	118,221,000

Fair_Value_Disclosures_Tables

Fair Value Disclosures (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Assets and liabilities measured on recurring basis measured at fair value	The following table presents the balances of assets and liabilities that were measured at fair value on a recurring basis as of December 31, 2014 and 2013.
		At December 31, 2014
		Level 1		Level 2		Level 3		Total
	Securities available for sale
	Mortgage-backed securities	$	—	$	151,855,000	$	—	$	151,855,000
	State and political subdivisions	—		30,855,000		—		30,855,000
	Other equity securities	—		2,551,000		—		2,551,000
	Total assets	$	—	$	185,261,000	$	—	$	185,261,000
		At December 31, 2013
		Level 1		Level 2		Level 3		Total
	Securities available for sale
	Mortgage-backed securities	$	—	$	177,729,000	$	—	$	177,729,000
	State and political subdivisions	—		126,315,000		—		126,315,000
	Other equity securities	—		1,780,000		—		1,780,000
	Total assets	$	—	$	305,824,000	$	—	$	305,824,000
Assets and liabilities measured on non-recurring basis measured at fair value	The following table presents assets measured at fair value on a nonrecurring basis that have had a fair value adjustment since their initial recognition. Other real estate owned is presented net of an allowance for losses of $654,000 and $330,000 at December 2014 and 2013, respectively. Only collateral-dependent impaired loans with a related specific allowance for loan losses or a partial charge off are included in impaired loans for purposes of fair value disclosures. Impaired loans below are presented net of specific allowances of $1,074,000 and $1,309,000 at December 31, 2014 and 2013, respectively.
		At December 31, 2014
		Level 1		Level 2		Level 3		Total
	Other real estate owned	$	—	$	3,785,000	$	—	$	3,785,000
	Impaired loans	—		1,909,000		—		1,909,000
	Total Assets	$	—	$	5,694,000	$	—	$	5,694,000
		At December 31, 2013
		Level 1		Level 2		Level 3		Total
	Other real estate owned	$	—	$	4,807,000	$	—	$	4,807,000
	Impaired loans	—		1,116,000		—		1,116,000
	Total Assets	$	—	$	5,923,000	$	—	$	5,923,000
Estimated fair value of financial instruments	The carrying amounts and estimated fair values for financial instruments as of December 31, 2014 were as follows:
		Carrying		Estimated
	As of December 31, 2014	value		fair value		Level 1		Level 2		Level 3
	Financial assets
	Cash and cash equivalents	$	13,057,000	$	13,057,000	$	13,057,000	$	—	$	—
	Interest bearing deposits in other banks	3,559,000		3,559,000		3,559,000		—		—
	Securities available for sale	185,261,000		185,261,000		—		185,261,000		—
	Securities to be held to maturity	275,919,000		279,704,000		—		279,704,000		—
	Restricted equity securities	13,912,000		13,912,000		—		13,912,000		—
	Loans (net of allowance for loan losses)
	Commercial
	Real estate	238,104,000		236,368,000		—		431,000		235,937,000
	Construction	29,951,000		29,733,000		—		—		29,733,000
	Other	102,738,000		102,858,000		—		—		102,858,000
	Municipal	20,406,000		20,833,000		—		—		20,833,000
	Residential
	Term	382,620,000		389,200,000		—		990,000		388,210,000
	Construction	12,136,000		12,123,000		—		—		12,123,000
	Home equity line of credit	102,258,000		101,733,000		—		488,000		101,245,000
	Consumer	19,007,000		19,207,000		—		—		19,207,000
	Total loans	907,220,000		912,055,000		—		1,909,000		910,146,000
	Mortgage servicing rights	1,086,000		2,088,000		—		2,088,000		—
	Accrued interest receivable	4,748,000		4,748,000		—		4,748,000		—
	Financial liabilities
	Demand deposits	$	113,133,000	$	109,973,000	$	—	$	109,973,000	$	—
	NOW deposits	199,977,000		186,490,000		—		186,490,000		—
	Money market deposits	98,607,000		83,837,000		—		83,837,000		—
	Savings deposits	165,601,000		146,936,000		—		146,936,000		—
	Local certificates of deposit	205,072,000		205,360,000		—		205,360,000		—
	National certificates of deposit	242,429,000		242,824,000		—		242,824,000		—
	Total deposits	1,024,819,000		975,420,000		—		975,420,000		—
	Repurchase agreements	74,725,000		70,783,000		—		70,783,000		—
	Federal Home Loan Bank advances	205,191,000		208,259,000		—		208,259,000		—
	Total borrowed funds	279,916,000		279,042,000		—		279,042,000		—
	Accrued interest payable	521,000		521,000		—		521,000		—
	The carrying amounts and estimated fair values for financial instruments as of December 31, 2013 were as follows:
		Carrying		Estimated
	As of December 31, 2013	value		fair value		Level 1		Level 2		Level 3
	Financial assets
	Cash and cash equivalents	$	16,570,000	$	16,570,000	$	16,570,000	$	—	$	—
	Interest bearing deposits in other banks	2,562,000		2,562,000		2,562,000		—		—
	Securities available for sale	305,824,000		305,824,000		—		305,824,000		—
	Securities to be held to maturity	169,277,000		158,336,000		—		158,336,000		—
	Restricted equity securities	13,912,000		13,912,000		—		13,912,000		—
	Loans held for sale	83,000		83,000		—		83,000		—
	Loans (net of allowance for loan losses)
	Commercial
	Real estate	240,555,000		239,973,000		—		109,000		239,864,000
	Construction	19,709,000		19,661,000		—		—		19,661,000
	Other	92,625,000		92,855,000		—		229,000		92,626,000
	Municipal	19,099,000		19,358,000		—		—		19,358,000
	Residential
	Term	375,932,000		381,918,000		—		778,000		381,140,000
	Construction	11,778,000		11,794,000		—		—		11,794,000
	Home equity line of credit	90,759,000		90,542,000		—		—		90,542,000
	Consumer	14,396,000		14,438,000		—		—		14,438,000
	Total loans	864,853,000		870,539,000		—		1,116,000		869,423,000
	Mortgage servicing rights	1,158,000		1,948,000		—		1,948,000		—
	Accrued interest receivable	5,038,000		5,038,000		—		5,038,000		—
	Financial liabilities
	Demand deposits	$	106,125,000	$	96,175,000	$	—	$	96,175,000	$	—
	NOW deposits	151,322,000		129,815,000		—		129,815,000		—
	Money market deposits	86,730,000		67,968,000		—		67,968,000		—
	Savings deposits	149,103,000		122,891,000		—		122,891,000		—
Local certificates of deposit	226,658,000		228,767,000		—		228,767,000		—
National certificates of deposit	304,461,000		306,346,000		—		306,346,000		—
Total deposits	1,024,399,000		951,962,000		—		951,962,000		—
Repurchase agreements	94,477,000		94,477,000		—		94,477,000		—
Federal Home Loan Bank advances	184,648,000		189,644,000		—		189,644,000		—
Total borrowed funds	279,125,000		284,121,000		—		284,121,000		—
Accrued interest payable	599,000		599,000		—		599,000		—

Other_Operating_Income_and_Exp1

Other Operating Income and Expense (Tables)	12 Months Ended
	Dec. 31, 2014
Other Income and Expenses [Abstract]
Other operating income and expense	Other operating income and other operating expense include the following items greater than 1% of revenues.
	For the years ended December 31,	2014		2013		2012
	Other operating income
	ATM and debit card income	$	2,630,000	$	2,440,000	$	1,994,000
	Other operating expense
	Advertising and marketing expense	$	1,022,000	$	1,117,000	$	935,000
	Accounting and auditing expenses	746,000		674,000		630,000
	Collections/foreclosures/ other real estate owned expense	657,000		878,000		606,000
	ATM and interchange expense	760,000		778,000		940,000
	Legal fees and expenses	769,000		482,000		715,000

Condensed_Financial_Informatio1

Condensed Financial Information of Parent (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed financial information for Parent	Condensed financial information for The First Bancorp, Inc. exclusive of its subsidiary is as follows:
	Balance Sheets
	As of December 31,	2014			2013
	Assets
	Cash and cash equivalents	$	522,000		$	1,113,000
	Dividends receivable	2,500,000			1,500,000
	Investments	528,000			543,000
	Investment in subsidiary	132,399,000			117,391,000
	Premises and equipment	24,000			32,000
	Goodwill	27,559,000			27,559,000
	Other assets	302,000			203,000
	Total assets	$	163,834,000		$	148,341,000
	Liabilities and shareholders' equity
	Dividends payable	$	2,252,000		$	2,134,000
	Other liabilities	28,000			109,000
	Total liabilities	2,280,000			2,243,000
	Shareholders' equity
	Common stock	107,000			106,000
	Additional paid-in capital	59,282,000			58,395,000
	Retained earnings	102,125,000			87,523,000
	Accumulated other comprehensive income
	Net unrealized gain on available for sale securities,	40,000			74,000
	net of tax
	Total accumulated other comprehensive income	40,000			74,000
	Total shareholders' equity	161,554,000			146,098,000
	Total liabilities and shareholders' equity	$	163,834,000		$	148,341,000
	Statements of Income
	For the years ended December 31,	2014			2013			2012
	Interest and dividends on investments	$	15,000		$	10,000		$	10,000
	Net securities gains	38,000			—			—
	Total income	53,000			10,000			10,000
	Occupancy expense	12,000			11,000			8,000
	Other operating expense	604,000			362,000			218,000
	Total expense	616,000			373,000			226,000
	Loss before income taxes and Bank earnings	(563,000		)	(363,000		)	(216,000		)
	Applicable income taxes	(200,000		)	(128,000		)	(76,000		)
	Loss before Bank earnings	(363,000		)	(235,000		)	(140,000		)
	Equity in earnings of Bank
	Remitted	8,850,000			7,096,000			9,694,000
	Unremitted	6,222,000			6,104,000			3,134,000
	Net income	$	14,709,000		$	12,965,000		$	12,688,000
	Statements of Cash Flows
	For the years ended December 31,	2014			2013			2012
	Cash flows from operating activities:
	Net income	$	14,709,000		$	12,965,000		$	12,688,000
	Adjustments to reconcile net income to net cash provided by operating activities:
	Depreciation	9,000			11,000			8,000
	Equity compensation expense	431,000			214,000			85,000
	Gain on sale of investment	(38,000		)	—			—
	Increase in other assets	(98,000		)	(132,000		)	(15,000		)
	(Increase) decrease in dividend receivable	(1,050,000		)	400,000			—
	Increase (decrease) in other liabilities	105,000			258,000			(5,000		)
	Unremitted earnings of Bank	(6,222,000		)	(6,104,000		)	(3,134,000		)
	Net cash provided by operating activities	7,846,000			7,612,000			9,627,000
	Cash flows from investing activities:
	Capital expenditures	(1,000		)	—			(25,000		)
	Net cash used in investing activities	(1,000		)	—			(25,000		)
	Cash flows from financing activities:
	Payment to repurchase preferred stock	—			(12,500,000		)	—
	Proceeds from sale of common stock	457,000			11,973,000			499,000
	Dividends paid	(8,893,000		)	(8,657,000		)	(8,310,000		)
	Net cash used in financing activities	(8,436,000		)	(9,184,000		)	(7,811,000		)
	Net increase (decrease) in cash and cash equivalents	(591,000		)	(1,572,000		)	1,791,000
	Cash and cash equivalents at beginning of year	1,113,000			2,685,000			894,000
Cash and cash equivalents at end of year	$	522,000		$	1,113,000		$	2,685,000

Quarterly_Information_Tables

Quarterly Information (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly information	The following tables provide unaudited financial information by quarter for each of the past two years:
	Dollars in thousands except per share data	2013Q1			2013Q2			2013Q3			2013Q4			2014Q1		2014Q2		2014Q3			2014Q4
	Balance Sheets
	Cash and cash equivalents	$	16,523		$	18,683		$	20,117		$	16,570		$	13,894	$	20,416	$	17,167		$	13,057
	Interest-bearing deposits in other banks	5,941			334			787			2,562			2,935		272		773			3,559
	Investments	437,160			464,999			490,151			475,101			488,553		502,015		472,660			461,180
	Restricted equity securities	13,912			13,912			13,912			13,912			13,912		13,912		13,912			13,912
	Net loans and loans held for sale	851,001			854,448			851,171			864,936			857,315		880,492		896,857			907,220
	Other assets	92,250			92,120			88,611			90,882			89,508		86,973		87,268			83,203
	Total assets	$	1,416,787		$	1,444,496		$	1,464,749		$	1,463,963		$	1,466,117	$	1,504,080	$	1,488,637		$	1,482,131
	Deposits	$	975,861		$	1,027,682		$	1,037,466		$	1,024,399		$	1,045,970	$	1,033,436	$	1,055,322		$	1,024,819
	Borrowed funds	261,185			257,108			266,777			279,125			253,519		298,520		258,636			279,916
	Other liabilities	16,070			13,734			13,853			14,341			14,212		14,675		15,489			15,842
	Shareholders' equity	163,671			145,972			146,653			146,098			152,416		157,449		159,190			161,554
	Total liabilities	$	1,416,787		$	1,444,496		$	1,464,749		$	1,463,963		$	1,466,117	$	1,504,080	$	1,488,637		$	1,482,131
	& equity
	Income and Comprehensive Income (Loss) Statements
	Interest income	$	12,265		$	12,249		$	12,655		$	12,767		$	12,623	$	12,740	$	12,869		$	12,790
	Interest expense	3,102			3,138			3,150			3,106			2,912		2,905		2,865			2,743
	Net interest income	9,163			9,111			9,505			9,661			9,711		9,835		10,004			10,047
	Provision for	1,500			1,200			800			700			400		100		350			300
	loan losses
	Net interest income after provision for loan losses	7,663			7,911			8,705			8,961			9,311		9,735		9,654			9,747
	Non-interest income	3,288			3,579			2,621			2,599			2,332		2,458		3,656			2,602
	Non-interest expense	7,389			7,423			7,006			7,119			7,252		7,291		7,802			7,875
	Income before taxes	3,562			4,067			4,320			4,441			4,391		4,902		5,508			4,474
	Income taxes	706			825			955			939			963		1,155		1,400			1,048
	Net income	$	2,856		$	3,242		$	3,365		$	3,502		$	3,428	$	3,747	$	4,108		$	3,426
	Basic earnings per share	$	0.27		$	0.29		$	0.31		$	0.33		$	0.32	$	0.35	$	0.39		$	0.32
	Diluted earnings per share	$	0.27		$	0.29		$	0.31		$	0.33		$	0.32	$	0.35	$	0.38		$	0.32
	Other comprehensive income (loss), net of tax
	Net unrealized gain (loss) on securities available for sale	$	(2,466	)	$	(8,907	)	$	(779	)	$	(2,379	)	$	4,824	$	3,313	$	(319	)	$	1,295
	Net unrealized loss on securities transfered from available for sale to held to maturity	—			—			—			—			—		—		(28		)	(20		)
	Unrecognized gain (loss) on postretirement benefit costs	4			4			—			303			—		—		—			(313		)
	Other comprehensive income (loss)	$	(2,462	)	$	(8,903	)	$	(779	)	$	(2,076	)	$	4,824	$	3,313	$	(347	)	$	962
	Comprehensive income (loss)	$	394		$	(5,661	)	$	2,586		$	1,426		$	8,252	$	7,060	$	3,761		$	4,388

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Finite lived intangible asset, amortization (in years)	10 years
Amortization of identified intangibles	$326	$326	$283
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	43,000
Amortization of Intangible Assets, Yearly Expense till Fully Amortized	43
FNB Bankshares | Core Deposits
Business Acquisition [Line Items]
Amortization of identified intangibles	283	283	283
Amortization of Intangible Assets - FNB Bankshares	$14

Cash_and_Cash_Equivalents_Deta

Cash and Cash Equivalents (Details) (USD $)	Dec. 31, 2014
Cash and Cash Equivalents [Abstract]
Contractual clearing balance	$500,000
Cash held in Reserve at Federal Reserve Bank	$1,184,000

Investment_Securities_Details

Investment Securities (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Dec. 31, 2011
	security
	state
Securities available for sale
Amortized Cost-Equity	$2,490	$1,666
Amortized Cost-Total	181,380	315,963
Unrealized Gains	4,567	2,966
Unrealized Losses	-686	-13,105
Fair Value Estimated	185,261	305,824
Proceeds from sales of securities	15,557	10,563	26,437
Gross realized gains	1,155	1,087	2,257
Gross realized losses	0	0	-289
Net gain	1,155	1,087	1,968
Related income taxes	404	380	689
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	17,298	244,393
12 months or more, Fair Value	111,694	12,651
Total, Fair Value	128,992	257,044
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	-74	-25,629
12 months or more, Unrealized Losses	-2,825	-1,681
Total, Unrealized Losses	-2,899	-27,310
Available-for-Sale Securities, Transferred Security, at Carrying Value				89,780
Available-for-Sale Securities, Transferred Security, at Fair Value				89,757
Available-for-sale Securities, Transferred to Held-to-maturity Securities, Accumulated Unrealized Gain (Loss)				-15
Other Comprehensive Income (Loss), Accumulated Unrealized Gain (Loss) on Transfer of Available-for-sale Securities to Held-to-maturity	-48	0	0		0
Number Of States in New England Where FHLB Serve	6
Federal Home Loan Bank stock, at cost	12,875	12,875
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	275,919	169,277
Unrealized Gains	5,998	3,264
Unrealized Losses	-2,213	-14,205
Securities to be held to maturity, fair value	279,704	158,336
Restricted equity securities, cost and FMV [Abstract]
Amortized Cost	13,912	13,912
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value Estimated	13,912	13,912
Securities available for sale, maturities amortized cost [Abstract]
Amortized cost, debt maturities, due in 1 year or less	2,309	717
Amortized cost, debt maturities, due in 1 to 5 years	15,200	20,547
Amortized cost, debt maturities, due in 5 to 10 years	18,547	16,114
Amortized cost, debt maturities, due after 10 years	142,834	276,919
Amortized cost, equity maturities	2,490	1,666
Amortized Cost-Total	181,380	315,963
Securities available for sale, maturities fair value estimated [Abstract]
Fair value, debt maturities, due in 1 year or less	2,329	721
Fair value, debt maturities, due in 1 to 5 years	15,499	20,636
Fair value, debt maturities, due in 5 to 10 years	19,124	16,267
Fair value, debt maturities, due after 10 years	145,758	266,420
Fair value, equity maturities	2,551	1,780
Fair Value Estimated	185,261	305,824
Securities to be held to maturity, maturities, amortized cost [Abstract]
Amortized cost, due in 1 year or less	1,693	268
Amortized cost, due in 1 to 5 years	8,467	6,420
Amortized cost, due in 5 to 10 years	50,629	33,442
Amortized cost, due after 10 years	215,130	129,147
Securities to be held to maturity, amortized cost	275,919	169,277
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Fair value, due in 1 year or less	1,713	273
Fair value, due in 1 to 5 years	8,702	6,790
Fair value, due in 5 to 10 years	52,717	33,828
Fair value, due after 10 years	216,572	117,445
Securities to be held to maturity, fair value	279,704	158,336
Fair value of securities pledged to secure borrowings from the Federal Home Loan Bank of Boston, public deposits, repurchase agreements, and for other purposes as required by law	164,919	147,074
Number of securities temporarily impaired as a result of changes in interest rates reducing their fair value (in number of securities)	56
Number of securities temporarily impaired for 12 months or more (in number of securities)	36
Length of time for the temporary impairment (in months)	12 months
Federal Home Loan Bank Stock
Restricted equity securities, cost and FMV [Abstract]
Amortized Cost	12,875	12,875
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value Estimated	12,875	12,875
Federal Reserve Bank Stock
Restricted equity securities, cost and FMV [Abstract]
Amortized Cost	1,037	1,037
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value Estimated	1,037	1,037
US Treasury and Government
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	92,341	92,280
Unrealized Gains	54	1
Unrealized Losses	-2,066	-12,757
Securities to be held to maturity, fair value	90,329	79,524
Securities to be held to maturity, maturities, amortized cost [Abstract]
Securities to be held to maturity, amortized cost	92,341	92,280
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Securities to be held to maturity, fair value	90,329	79,524
Collateralized Mortgage Backed Securities
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	57,003	35,712
Unrealized Gains	1,830	1,440
Unrealized Losses	-116	-1,336
Securities to be held to maturity, fair value	58,717	35,816
Securities to be held to maturity, maturities, amortized cost [Abstract]
Securities to be held to maturity, amortized cost	57,003	35,712
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Securities to be held to maturity, fair value	58,717	35,816
US States and Political Subdivisions Debt Securities
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	126,275	40,985
Unrealized Gains	4,114	1,823
Unrealized Losses	-31	-112
Securities to be held to maturity, fair value	130,358	42,696
Securities to be held to maturity, maturities, amortized cost [Abstract]
Securities to be held to maturity, amortized cost	126,275	40,985
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Securities to be held to maturity, fair value	130,358	42,696
Corporate Debt Securities
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	300	300
Unrealized Gains	0	0
Unrealized Losses	0	0
Securities to be held to maturity, fair value	300	300
Securities to be held to maturity, maturities, amortized cost [Abstract]
Securities to be held to maturity, amortized cost	300	300
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Securities to be held to maturity, fair value	300	300
US Treasury and Government
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	0	78,724
12 months or more, Fair Value	79,444	0
Total, Fair Value	79,444	78,724
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	0	-12,757
12 months or more, Unrealized Losses	-2,066	0
Total, Unrealized Losses	-2,066	-12,757
Collateralized Mortgage Backed Securities
Securities available for sale
Amortized Cost-Debt	149,796	180,109
Unrealized Gains	2,637	1,392
Unrealized Losses	-578	-3,772
Fair Value Estimated	151,855	177,729
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	13,878	96,263
12 months or more, Fair Value	29,182	5,451
Total, Fair Value	43,060	101,714
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	-40	-4,977
12 months or more, Unrealized Losses	-654	-131
Total, Unrealized Losses	-694	-5,108
Securities available for sale, maturities fair value estimated [Abstract]
Fair Value Estimated	151,855	177,729
US States and Political Subdivisions Debt Securities
Securities available for sale
Amortized Cost-Debt	29,094	134,188
Unrealized Gains	1,865	1,458
Unrealized Losses	-104	-9,331
Fair Value Estimated	30,855	126,315
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	3,352	69,406
12 months or more, Fair Value	3,017	7,150
Total, Fair Value	6,369	76,556
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	-31	-7,895
12 months or more, Unrealized Losses	-104	-1,548
Total, Unrealized Losses	-135	-9,443
Securities available for sale, maturities fair value estimated [Abstract]
Fair Value Estimated	30,855	126,315
Other Equity Securities
Securities available for sale
Amortized Cost-Equity	2,490	1,666
Unrealized Gains	65	116
Unrealized Losses	-4	-2
Fair Value Estimated	2,551	1,780
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	68	0
12 months or more, Fair Value	51	50
Total, Fair Value	119	50
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	-3	0
12 months or more, Unrealized Losses	-1	-2
Total, Unrealized Losses	-4	-2
Securities available for sale, maturities amortized cost [Abstract]
Amortized cost, equity maturities	2,490	1,666
Securities available for sale, maturities fair value estimated [Abstract]
Fair Value Estimated	$2,551	$1,780

Mortgage_Servicing_Rights_Deta

Mortgage Servicing Rights (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Transfers and Servicing [Abstract]
Outstanding principal balance of loans serviced for others	$214,086	$211,634
Net gain from sale of loans	496	1,224	1,141
Mortgage servicing rights capitalized	345	743
Amortization of mortgage servicing rights	428	515
Fair value of mortgage servicing rights	2,088	1,948
Moving average of weekly prepayment data (in months)	3 months
Anticipated loan prepayment rate of servicing assets (in hundredths)	11.38%
Period used to determine average quarterly discount rate (in years)	10 years
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate adjustment factor (in hundredths)	4.76%
Summary of mortgage servicing rights [Abstract]
Mortgage servicing rights	6,039	7,172
Accumulated amortization	-4,949	-5,988
Impairment reserve	-4	-26
Mortgage Servicing Rights Net	$1,086	$1,158

Loans_Details

Loans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	loan	loan
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	$917,564,000	$876,367,000	$869,284,000
Percentage of loan portfolio (in hundredths)	100.00%	100.00%
Loans Receivable to Related Party [Roll Forward]
Balance at beginning of year	14,884,000	14,917,000
New loans	8,932,000	909,000
Repayments	-8,960,000	-942,000
Balance at end of year	14,856,000	14,884,000	14,917,000
Loans, aging disclosure [Abstract]
Loans Receivable 30 59 Days Past Due	2,142,000	1,588,000
Loans Receivable 60 89 Days Past Due	1,356,000	2,471,000
90 Plus Days Past Due	8,365,000	11,933,000
All Past Due	11,863,000	15,992,000
Current	905,701,000	860,375,000
Amount of loan portfolio	917,564,000	876,367,000	869,284,000
90 Plus Days And Accruing	181,000	1,043,000
Nonaccrual Loans [Abstract]
Nonaccrual Loans Receivable	10,510,000	16,318,000
Average investment in impaired loans	38,404,000	45,722,000	45,019,000
Interest income recognized on impaired loans, all on cash basis	1,465,000	1,750,000	1,039,000
Balance of impaired loans	35,862,000	42,351,000	45,744,000
Less portion for which no allowance for loan losses is allocated	-26,313,000	-32,417,000
Portion of impaired loan balance for which an allowance for loan losses is allocated	9,549,000	9,934,000
Portion of allowance for loan losses allocated to the impaired loan balance	826,000	3,604,000
Recorded Investment	35,862,000	42,351,000	45,744,000
Unpaid Principal Balance	39,026,000	46,408,000	49,542,000
Related Allowance	1,803,000	2,461,000	3,539,000
Average Recorded Investment	38,404,000	45,722,000	45,019,000
Recognized Interest Income	1,465,000	1,750,000	1,039,000
Troubled Debt Restructured, Number of Loans	94	99
Troubled Debt Restructured, Balance	27,214,000	29,098,000
Troubled Debt Restructured, Specific Reserves	868,000	1,017,000
Troubled Debt Restructured (Greater than 30 days), Number of Loans	12	16
Troubled Debt Restructured (Greater than 30 days), Balance	1,549,000	3,261,000
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	177,000	37,000
Financing Receivable, Number of Loans	6	10
Financing Receivable, Pre-Modification Outstanding Recorded Investment	929,000	3,610,000
Financing Receivable, Post-Modification Outstanding Recorded Investment	826,000	3,604,000
Financing Receivable, Specific Reserves	12,000	31,000
Net deferred loan costs included in loan balances	2,729,000	2,086,000
Loans used to collateralize borrowings from the Federal Home Loan Bank of Boston	266,716,000	266,740,000
Commercial, construction and home equity loans used to collateralize unused line of credit at the Federal Reserve Bank of Boston	240,943,000	189,728,000
Interest income which would have been recognized on these loans, if interest had been accrued	551,000	917,000	1,158,000
Due from Related Parties	29,883,000	28,821,000
Balance of loans classified as TDRs, greater than 30 days past due	1,549,000	3,261,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	6
Financing Receivable, Loans Classified as Troubled Debt Restructurings That Had Been Placed on TDR Status in Previous 12 Months	238,000	810,000
Loans classified as TDRs that are involved in bankruptcy	1,215,000
Number of loans classified as TDRs that were on non-accrual status	16
Loans classified as TDRs that were on non-accrual status	2,496,000
Number of loans classified as TDRs that are involved in foreclosure	5
Loans classified as TDRs that are involved in foreclosure	611,000
With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	11,478,000	14,181,000	18,182,000
Balance of impaired loans	9,549,000	9,934,000	17,462,000
Recorded Investment	9,549,000	9,934,000	17,462,000
Unpaid Principal Balance	9,949,000	10,289,000	18,239,000
Related Allowance	1,803,000	2,461,000	3,539,000
Average Recorded Investment	11,478,000	14,181,000	18,182,000
Recognized Interest Income	387,000	390,000	571,000
With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	26,926,000	31,541,000	26,837,000
Balance of impaired loans	26,313,000	32,417,000	28,282,000
Recorded Investment	26,313,000	32,417,000	28,282,000
Unpaid Principal Balance	29,077,000	36,119,000	31,303,000
Related Allowance	0	0	0
Average Recorded Investment	26,926,000	31,541,000	26,837,000
Recognized Interest Income	1,078,000	1,360,000	468,000
Commercial Real Estate Other Receivable
Nonaccrual Loans [Abstract]
Troubled Debt Restructured, Number of Loans	15	20
Troubled Debt Restructured, Balance	2,007,000	2,734,000
Troubled Debt Restructured, Specific Reserves	0	100,000
Troubled Debt Restructured (Greater than 30 days), Number of Loans	1	2
Troubled Debt Restructured (Greater than 30 days), Balance	2,000	355,000
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	0	0
Commercial Real Estate
Nonaccrual Loans [Abstract]
Troubled Debt Restructured, Number of Loans	19	20
Troubled Debt Restructured, Balance	12,282,000	13,018,000
Troubled Debt Restructured, Specific Reserves	267,000	433,000
Troubled Debt Restructured (Greater than 30 days), Number of Loans	1	2
Troubled Debt Restructured (Greater than 30 days), Balance	321,000	990,000
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	120,000	0
Commercial Construction
Nonaccrual Loans [Abstract]
Troubled Debt Restructured, Number of Loans	1	1
Troubled Debt Restructured, Balance	1,172,000	1,284,000
Troubled Debt Restructured, Specific Reserves	207,000	274,000
Troubled Debt Restructured (Greater than 30 days), Number of Loans	0	0
Troubled Debt Restructured (Greater than 30 days), Balance	0	0
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	0	0
Municipal
Nonaccrual Loans [Abstract]
Troubled Debt Restructured, Number of Loans	0	0
Troubled Debt Restructured, Balance	0	0
Troubled Debt Restructured, Specific Reserves	0	0
Residential Term
Nonaccrual Loans [Abstract]
Troubled Debt Restructured, Number of Loans	54	53
Troubled Debt Restructured, Balance	10,932,000	11,220,000
Troubled Debt Restructured, Specific Reserves	373,000	210,000
Troubled Debt Restructured (Greater than 30 days), Number of Loans	8	10
Troubled Debt Restructured (Greater than 30 days), Balance	1,000,000	1,688,000
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	36,000	37,000
Residential Construction
Nonaccrual Loans [Abstract]
Troubled Debt Restructured, Number of Loans	0	0
Troubled Debt Restructured, Balance	0	0
Troubled Debt Restructured, Specific Reserves	0	0
Troubled Debt Restructured (Greater than 30 days), Number of Loans	0	0
Troubled Debt Restructured (Greater than 30 days), Balance	0	0
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	0	0
Home equity line of credit
Nonaccrual Loans [Abstract]
Troubled Debt Restructured, Number of Loans	5	5
Troubled Debt Restructured, Balance	821,000	842,000
Troubled Debt Restructured, Specific Reserves	21,000	0
Troubled Debt Restructured (Greater than 30 days), Number of Loans	2	2
Troubled Debt Restructured (Greater than 30 days), Balance	226,000	228,000
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	21,000	0
Consumer
Nonaccrual Loans [Abstract]
Troubled Debt Restructured, Number of Loans	0	0
Troubled Debt Restructured, Balance	0	0
Troubled Debt Restructured, Specific Reserves	0	0
Troubled Debt Restructured (Greater than 30 days), Number of Loans	0	0
Troubled Debt Restructured (Greater than 30 days), Balance	0	0
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	0	0
Commercial Other
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	104,531,000	95,289,000	81,183,000
Percentage of loan portfolio (in hundredths)	11.40%	10.90%
Loans, aging disclosure [Abstract]
Loans Receivable 30 59 Days Past Due	3,000	544,000
Loans Receivable 60 89 Days Past Due	0	128,000
90 Plus Days Past Due	857,000	2,797,000
All Past Due	860,000	3,469,000
Current	103,671,000	91,820,000
Amount of loan portfolio	104,531,000	95,289,000	81,183,000
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual Loans Receivable	935,000	4,370,000
Average investment in impaired loans	4,956,000	5,898,000	4,851,000
Balance of impaired loans	2,942,000	6,698,000	5,861,000
Recorded Investment	2,942,000	6,698,000	5,861,000
Unpaid Principal Balance	3,745,000	8,441,000	6,471,000
Related Allowance	129,000	841,000	652,000
Average Recorded Investment	4,956,000	5,898,000	4,851,000
Recognized Interest Income	169,000	350,000	91,000
Financing Receivable, Number of Loans		2
Financing Receivable, Pre-Modification Outstanding Recorded Investment		491,000
Financing Receivable, Post-Modification Outstanding Recorded Investment		491,000
Financing Receivable, Specific Reserves		0
Commercial Other | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	1,103,000	1,633,000	1,974,000
Balance of impaired loans	326,000	1,081,000	1,124,000
Recorded Investment	326,000	1,081,000	1,124,000
Unpaid Principal Balance	338,000	1,132,000	1,126,000
Related Allowance	129,000	841,000	652,000
Average Recorded Investment	1,103,000	1,633,000	1,974,000
Recognized Interest Income	13,000	28,000	38,000
Commercial Other | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	3,853,000	4,265,000	2,877,000
Balance of impaired loans	2,616,000	5,617,000	4,737,000
Recorded Investment	2,616,000	5,617,000	4,737,000
Unpaid Principal Balance	3,407,000	7,309,000	5,345,000
Related Allowance	0	0	0
Average Recorded Investment	3,853,000	4,265,000	2,877,000
Recognized Interest Income	156,000	322,000	53,000
Commercial Real Estate Other Receivable
Nonaccrual Loans [Abstract]
Financing Receivable, Number of Loans	0
Financing Receivable, Pre-Modification Outstanding Recorded Investment	0
Financing Receivable, Post-Modification Outstanding Recorded Investment	0
Financing Receivable, Specific Reserves	0
Consumer Portfolio Segment
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	19,653,000	15,066,000	14,657,000
Loans, aging disclosure [Abstract]
Amount of loan portfolio	19,653,000	15,066,000	14,657,000
Nonaccrual Loans [Abstract]
Financing Receivable, Number of Loans	0	0
Financing Receivable, Pre-Modification Outstanding Recorded Investment	0	0
Financing Receivable, Post-Modification Outstanding Recorded Investment	0	0
Financing Receivable, Specific Reserves	0	0
Commercial Construction
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	30,932,000	20,382,000	22,417,000
Loans, aging disclosure [Abstract]
Amount of loan portfolio	30,932,000	20,382,000	22,417,000
Nonaccrual Loans [Abstract]
Financing Receivable, Number of Loans	0	0
Financing Receivable, Pre-Modification Outstanding Recorded Investment	0	0
Financing Receivable, Post-Modification Outstanding Recorded Investment	0	0
Financing Receivable, Specific Reserves	0	0
Commercial Real Estate Portfolio Segment
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	242,311,000	245,943,000	251,335,000
Loans, aging disclosure [Abstract]
Amount of loan portfolio	242,311,000	245,943,000	251,335,000
Nonaccrual Loans [Abstract]
Financing Receivable, Number of Loans	2	2
Financing Receivable, Pre-Modification Outstanding Recorded Investment	302,000	1,883,000
Financing Receivable, Post-Modification Outstanding Recorded Investment	300,000	1,883,000
Financing Receivable, Specific Reserves	0	0
Commercial Real Estate
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	242,311,000	245,943,000
Percentage of loan portfolio (in hundredths)	26.40%	28.20%
Loans, aging disclosure [Abstract]
Loans Receivable 30 59 Days Past Due	24,000	82,000
Loans Receivable 60 89 Days Past Due	75,000	259,000
90 Plus Days Past Due	761,000	745,000
All Past Due	860,000	1,086,000
Current	241,451,000	244,857,000
Amount of loan portfolio	242,311,000	245,943,000
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual Loans Receivable	2,088,000	2,457,000
Average investment in impaired loans	14,120,000	16,773,000	14,716,000
Balance of impaired loans	13,304,000	14,935,000	15,774,000
Recorded Investment	13,304,000	14,935,000	15,774,000
Unpaid Principal Balance	14,212,000	15,683,000	16,981,000
Related Allowance	346,000	890,000	1,523,000
Average Recorded Investment	14,120,000	16,773,000	14,716,000
Recognized Interest Income	550,000	645,000	410,000
Commercial Real Estate | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	3,040,000	5,673,000	4,614,000
Balance of impaired loans	1,617,000	3,122,000	6,388,000
Recorded Investment	1,617,000	3,122,000	6,388,000
Unpaid Principal Balance	1,789,000	3,264,000	7,018,000
Related Allowance	346,000	890,000	1,523,000
Average Recorded Investment	3,040,000	5,673,000	4,614,000
Recognized Interest Income	62,000	150,000	211,000
Commercial Real Estate | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	11,080,000	11,100,000	10,102,000
Balance of impaired loans	11,687,000	11,813,000	9,386,000
Recorded Investment	11,687,000	11,813,000	9,386,000
Unpaid Principal Balance	12,423,000	12,419,000	9,963,000
Related Allowance	0	0	0
Average Recorded Investment	11,080,000	11,100,000	10,102,000
Recognized Interest Income	488,000	495,000	199,000
Commercial Construction
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	30,932,000	20,382,000
Percentage of loan portfolio (in hundredths)	3.40%	2.30%
Loans, aging disclosure [Abstract]
Loans Receivable 30 59 Days Past Due	0	0
Loans Receivable 60 89 Days Past Due	41,000	0
90 Plus Days Past Due	208,000	0
All Past Due	249,000	0
Current	30,683,000	20,382,000
Amount of loan portfolio	30,932,000	20,382,000
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual Loans Receivable	208,000	0
Average investment in impaired loans	1,309,000	1,997,000	4,349,000
Balance of impaired loans	1,380,000	1,284,000	3,354,000
Recorded Investment	1,380,000	1,284,000	3,354,000
Unpaid Principal Balance	1,380,000	1,284,000	3,368,000
Related Allowance	413,000	272,000	969,000
Average Recorded Investment	1,309,000	1,997,000	4,349,000
Recognized Interest Income	56,000	48,000	85,000
Commercial Construction | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	1,279,000	1,795,000	1,816,000
Balance of impaired loans	1,380,000	1,284,000	3,253,000
Recorded Investment	1,380,000	1,284,000	3,253,000
Unpaid Principal Balance	1,380,000	1,284,000	3,253,000
Related Allowance	413,000	272,000	969,000
Average Recorded Investment	1,279,000	1,795,000	1,816,000
Recognized Interest Income	56,000	48,000	85,000
Commercial Construction | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	30,000	202,000	2,533,000
Balance of impaired loans	0	0	101,000
Recorded Investment	0	0	101,000
Unpaid Principal Balance	0	0	115,000
Related Allowance	0	0	0
Average Recorded Investment	30,000	202,000	2,533,000
Recognized Interest Income	0	0	0
Municipal
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	20,424,000	19,117,000	14,704,000
Percentage of loan portfolio (in hundredths)	2.20%	2.20%
Loans, aging disclosure [Abstract]
Loans Receivable 30 59 Days Past Due	0	0
Loans Receivable 60 89 Days Past Due	0	0
90 Plus Days Past Due	0	0
All Past Due	0	0
Current	20,424,000	19,117,000
Amount of loan portfolio	20,424,000	19,117,000	14,704,000
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual Loans Receivable	0	0
Average investment in impaired loans	0	0	0
Balance of impaired loans	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0	0
Recognized Interest Income	0	0	0
Troubled Debt Restructured (Greater than 30 days), Number of Loans	0	0
Troubled Debt Restructured (Greater than 30 days), Balance	0	0
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	0	0
Financing Receivable, Number of Loans	0	0
Financing Receivable, Pre-Modification Outstanding Recorded Investment	0	0
Financing Receivable, Post-Modification Outstanding Recorded Investment	0	0
Financing Receivable, Specific Reserves	0	0
Municipal | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	0	0	0
Balance of impaired loans	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0	0
Recognized Interest Income	0	0	0
Municipal | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	0	0	0
Balance of impaired loans	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0	0
Recognized Interest Income	0	0	0
Residential Term
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	384,032,000	377,218,000	379,447,000
Percentage of loan portfolio (in hundredths)	41.90%	43.00%
Loans, aging disclosure [Abstract]
Loans Receivable 30 59 Days Past Due	856,000	229,000
Loans Receivable 60 89 Days Past Due	468,000	1,913,000
90 Plus Days Past Due	5,679,000	7,002,000
All Past Due	7,003,000	9,144,000
Current	377,029,000	368,074,000
Amount of loan portfolio	384,032,000	377,218,000	379,447,000
90 Plus Days And Accruing	101,000	596,000
Nonaccrual Loans [Abstract]
Nonaccrual Loans Receivable	6,421,000	8,484,000
Average investment in impaired loans	16,243,000	19,378,000	18,867,000
Balance of impaired loans	16,123,000	17,786,000	19,444,000
Recorded Investment	16,123,000	17,786,000	19,444,000
Unpaid Principal Balance	17,337,000	19,116,000	21,282,000
Related Allowance	519,000	404,000	395,000
Average Recorded Investment	16,243,000	19,378,000	18,867,000
Recognized Interest Income	641,000	673,000	426,000
Financing Receivable, Number of Loans	4	5
Financing Receivable, Pre-Modification Outstanding Recorded Investment	627,000	1,032,000
Financing Receivable, Post-Modification Outstanding Recorded Investment	526,000	1,029,000
Financing Receivable, Specific Reserves	12,000	31,000
Residential Term | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	5,738,000	4,982,000	9,066,000
Balance of impaired loans	5,303,000	4,354,000	6,697,000
Recorded Investment	5,303,000	4,354,000	6,697,000
Unpaid Principal Balance	5,513,000	4,516,000	6,842,000
Related Allowance	519,000	404,000	395,000
Average Recorded Investment	5,738,000	4,982,000	9,066,000
Recognized Interest Income	239,000	162,000	237,000
Residential Term | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	10,505,000	14,396,000	9,801,000
Balance of impaired loans	10,820,000	13,432,000	12,747,000
Recorded Investment	10,820,000	13,432,000	12,747,000
Unpaid Principal Balance	11,824,000	14,600,000	14,440,000
Related Allowance	0	0	0
Average Recorded Investment	10,505,000	14,396,000	9,801,000
Recognized Interest Income	402,000	511,000	189,000
Residential Construction
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	12,160,000	11,803,000	6,459,000
Percentage of loan portfolio (in hundredths)	1.30%	1.30%
Loans, aging disclosure [Abstract]
Loans Receivable 30 59 Days Past Due	0	47,000
Loans Receivable 60 89 Days Past Due	0	0
90 Plus Days Past Due	0	0
All Past Due	0	47,000
Current	12,160,000	11,756,000
Amount of loan portfolio	12,160,000	11,803,000	6,459,000
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual Loans Receivable	0	0
Average investment in impaired loans	0	0	821,000
Balance of impaired loans	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0	821,000
Recognized Interest Income	0	0	0
Financing Receivable, Number of Loans	0	0
Financing Receivable, Pre-Modification Outstanding Recorded Investment	0	0
Financing Receivable, Post-Modification Outstanding Recorded Investment	0	0
Financing Receivable, Specific Reserves	0	0
Residential Construction | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	0	0	261,000
Balance of impaired loans	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0	261,000
Recognized Interest Income	0	0	0
Residential Construction | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	0	0	560,000
Balance of impaired loans	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0	560,000
Recognized Interest Income	0	0	0
Home equity line of credit
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	103,521,000	91,549,000	99,082,000
Percentage of loan portfolio (in hundredths)	11.30%	10.40%
Loans, aging disclosure [Abstract]
Loans Receivable 30 59 Days Past Due	622,000	573,000
Loans Receivable 60 89 Days Past Due	720,000	145,000
90 Plus Days Past Due	780,000	1,001,000
All Past Due	2,122,000	1,719,000
Current	101,399,000	89,830,000
Amount of loan portfolio	103,521,000	91,549,000	99,082,000
90 Plus Days And Accruing	0	59,000
Nonaccrual Loans [Abstract]
Nonaccrual Loans Receivable	832,000	1,007,000
Average investment in impaired loans	1,765,000	1,676,000	1,403,000
Balance of impaired loans	2,087,000	1,648,000	1,311,000
Recorded Investment	2,087,000	1,648,000	1,311,000
Unpaid Principal Balance	2,324,000	1,884,000	1,440,000
Related Allowance	396,000	54,000	0
Average Recorded Investment	1,765,000	1,676,000	1,403,000
Recognized Interest Income	46,000	34,000	27,000
Financing Receivable, Number of Loans	0	1
Financing Receivable, Pre-Modification Outstanding Recorded Investment	0	204,000
Financing Receivable, Post-Modification Outstanding Recorded Investment	0	201,000
Financing Receivable, Specific Reserves	0	0
Home equity line of credit | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	318,000	98,000	442,000
Balance of impaired loans	923,000	93,000	0
Recorded Investment	923,000	93,000	0
Unpaid Principal Balance	929,000	93,000	0
Related Allowance	396,000	54,000	0
Average Recorded Investment	318,000	98,000	442,000
Recognized Interest Income	17,000	2,000	0
Home equity line of credit | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	1,447,000	1,578,000	961,000
Balance of impaired loans	1,164,000	1,555,000	1,311,000
Recorded Investment	1,164,000	1,555,000	1,311,000
Unpaid Principal Balance	1,395,000	1,791,000	1,440,000
Related Allowance	0	0	0
Average Recorded Investment	1,447,000	1,578,000	961,000
Recognized Interest Income	29,000	32,000	27,000
Consumer
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	19,653,000	15,066,000
Percentage of loan portfolio (in hundredths)	2.10%	1.70%
Loans, aging disclosure [Abstract]
Loans Receivable 30 59 Days Past Due	637,000	113,000
Loans Receivable 60 89 Days Past Due	52,000	26,000
90 Plus Days Past Due	80,000	388,000
All Past Due	769,000	527,000
Current	18,884,000	14,539,000
Amount of loan portfolio	19,653,000	15,066,000
90 Plus Days And Accruing	80,000	388,000
Nonaccrual Loans [Abstract]
Nonaccrual Loans Receivable	26,000	0
Average investment in impaired loans	11,000	0	12,000
Balance of impaired loans	26,000	0	0
Recorded Investment	26,000	0	0
Unpaid Principal Balance	28,000	0	0
Related Allowance	0	0	0
Average Recorded Investment	11,000	0	12,000
Recognized Interest Income	3,000	0	0
Consumer | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	0	0	9,000
Balance of impaired loans	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0	9,000
Recognized Interest Income	0	0	0
Consumer | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	11,000	0	3,000
Balance of impaired loans	26,000	0	0
Recorded Investment	26,000	0	0
Unpaid Principal Balance	28,000	0	0
Related Allowance	0	0	0
Average Recorded Investment	11,000	0	3,000
Recognized Interest Income	$3,000	$0	$0
Loans Receivable in Bankruptcy
Nonaccrual Loans [Abstract]
Financing Receivable, Number of Loans	9

Allowance_for_Loan_Losses_Deta

Allowance for Loan Losses (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	$1,803,000				$2,461,000				$1,803,000	$2,461,000	$3,539,000
Allowance for Loans Evaluated Collectively for Impairment	8,541,000				9,053,000				8,541,000	9,053,000	8,961,000
Total Allowance for Loan Losses	10,344,000				11,514,000				10,344,000	11,514,000	12,500,000
Total Allowance for Loan Losses	10,344,000				11,514,000				10,344,000	11,514,000	12,500,000
Commercial and municipal risk-rated loans receivable	398,198,000				380,731,000				398,198,000	380,731,000
Allowance for loan losses
Beginning balance				11,514,000				12,500,000	11,514,000	12,500,000	13,000,000
Chargeoffs									3,495,000	5,855,000	9,080,000
Recoveries									1,175,000	669,000	745,000
Provision for loan losses	300,000	350,000	100,000	400,000	700,000	800,000	1,200,000	1,500,000	1,150,000	4,200,000	7,835,000
Ending balance	10,344,000				11,514,000				10,344,000	11,514,000	12,500,000
Ending balance specifically evaluated for impairment	1,803,000				2,461,000				1,803,000	2,461,000	3,539,000
Ending balance collectively evaluated for impairment	8,541,000				9,053,000				8,541,000	9,053,000	8,961,000
Related loan balances
Ending balance	917,564,000				876,367,000				917,564,000	876,367,000	869,284,000
Ending balance specifically evaluated for impairment	35,862,000				42,351,000				35,862,000	42,351,000	45,744,000
Ending balance collectively evaluated for impairment	881,702,000				834,016,000				881,702,000	834,016,000	823,540,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for Loan and Lease Losses, Related Loans, Percentage									0.39%	0.40%
Allowance for Loan and Lease Losses, Related Loans, Period Increase (Decrease)									128,000
Total Allowance for Loan Losses	10,344,000				11,514,000				10,344,000	11,514,000	12,500,000
Allowance for loan and lease losses unallocated portion, period increase (decrease)									16,000
Average loan growth									0.03
Other Real Estate, Average Percentage of Sales Price below Appraised Value									20.00%
Other Real Estate, Additional Discount Percentage to Calculate Allowances for Losses									20.00%
Risk Based Ratios, Weighted-Average Required Reserve as Percent of Total Loans										1.33%
Allowance for Loan Losses of Total Loans, Percentage	1.13%				1.31%				1.13%	1.31%
Commercial real estate loans maximum loan-to-value (in hundredths)	75.00%								75.00%
Construction loans actual loan portfolio-to-Company capital (in hundredths)	31.30%								31.30%
Construction loans maximum loan portfolio-to-Company capital (in hundredths)	100.00%								100.00%
Construction and non-owner-occupied commercial real estate loan portfolio-to-Company Capital (in hundredths)	94.70%								94.70%
Construction and non-owner-occupied commercial real estate loan portfolio loan-to-Company capital (in hundredths)	300.00%								300.00%
Residential loans typical loan-to-value range, low (in hundredths)	75.00%								75.00%
Residential loans typical loan-to-value maximum (in hundredths)	80.00%								80.00%
Collateralized consumer loans to individuals loan-to-value maximum range, low (in hundredths)	80.00%								80.00%
Collateralized consumer loans to individuals loan-to-value maximum range, high (in hundredths)	90.00%								90.00%
Delinquent period before residential loans placed on non-accrual status (in days)									90 days
Delinquent period before consumer loans charged off (in days)									120 days
Strong 1
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	342,000				281,000				342,000	281,000
Above Average 2
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	39,438,000				38,318,000				39,438,000	38,318,000
Satisfactory 3
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	78,125,000				63,823,000				78,125,000	63,823,000
Average 4
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	176,959,000				161,073,000				176,959,000	161,073,000
Watch 5
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	56,712,000				42,791,000				56,712,000	42,791,000
OAEM 6
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	14,335,000				32,288,000				14,335,000	32,288,000
Substandard 7
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	32,287,000				41,532,000				32,287,000	41,532,000
Doubtful 8
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				625,000				0	625,000
Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	1,803,000				2,461,000				1,803,000	2,461,000
Total Allowance for Loan Losses	1,803,000				2,461,000				1,803,000	2,461,000
Allowance for loan losses
Ending balance	1,803,000				2,461,000				1,803,000	2,461,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,803,000				2,461,000				1,803,000	2,461,000
General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	3,282,000				3,906,000				3,282,000	3,906,000
Total Allowance for Loan Losses	3,282,000				3,906,000				3,282,000	3,906,000
Allowance for loan losses
Ending balance	3,282,000				3,906,000				3,282,000	3,906,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	3,282,000				3,906,000				3,282,000	3,906,000
Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	3,597,000				3,469,000				3,597,000	3,469,000
Total Allowance for Loan Losses	3,597,000				3,469,000				3,597,000	3,469,000
Allowance for loan losses
Ending balance	3,597,000				3,469,000				3,597,000	3,469,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	3,597,000				3,469,000				3,597,000	3,469,000
Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	1,662,000				1,678,000				1,662,000	1,678,000
Total Allowance for Loan Losses	1,662,000				1,678,000				1,662,000	1,678,000
Allowance for loan losses
Ending balance	1,662,000				1,678,000				1,662,000	1,678,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,662,000				1,678,000				1,662,000	1,678,000
Percentage of Total Reserve Allowance accounted for by Loan Loss Allowances	16.10%				14.60%				16.10%	14.60%
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	346,000				890,000				346,000	890,000	1,523,000
Allowance for Loans Evaluated Collectively for Impairment	3,186,000				3,712,000				3,186,000	3,712,000	4,342,000
Total Allowance for Loan Losses	3,532,000				4,602,000				3,532,000	4,602,000	5,865,000
Total Allowance for Loan Losses	3,532,000				4,602,000				3,532,000	4,602,000	5,865,000
Commercial and municipal risk-rated loans receivable	242,311,000				245,943,000				242,311,000	245,943,000
Allowance for loan losses
Beginning balance				4,602,000				5,865,000	4,602,000	5,865,000	5,659,000
Chargeoffs									1,205,000	150,000	1,394,000
Recoveries									144,000	0	13,000
Provision for loan losses									-9,000	-1,113,000	1,587,000
Ending balance	3,532,000				4,602,000				3,532,000	4,602,000	5,865,000
Ending balance specifically evaluated for impairment	346,000				890,000				346,000	890,000	1,523,000
Ending balance collectively evaluated for impairment	3,186,000				3,712,000				3,186,000	3,712,000	4,342,000
Related loan balances
Ending balance	242,311,000				245,943,000				242,311,000	245,943,000	251,335,000
Ending balance specifically evaluated for impairment	13,304,000				14,935,000				13,304,000	14,935,000	15,774,000
Ending balance collectively evaluated for impairment	229,007,000				231,008,000				229,007,000	231,008,000	235,561,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	3,532,000				4,602,000				3,532,000	4,602,000	5,865,000
Commercial Real Estate | Strong 1
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	12,000				16,000				12,000	16,000
Commercial Real Estate | Above Average 2
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	12,668,000				14,565,000				12,668,000	14,565,000
Commercial Real Estate | Satisfactory 3
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	50,275,000				45,213,000				50,275,000	45,213,000
Commercial Real Estate | Average 4
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	108,719,000				100,343,000				108,719,000	100,343,000
Commercial Real Estate | Watch 5
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	36,974,000				32,326,000				36,974,000	32,326,000
Commercial Real Estate | OAEM 6
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	9,846,000				26,102,000				9,846,000	26,102,000
Commercial Real Estate | Substandard 7
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	23,817,000				27,115,000				23,817,000	27,115,000
Commercial Real Estate | Doubtful 8
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				263,000				0	263,000
Commercial Real Estate | Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	346,000				890,000				346,000	890,000
Total Allowance for Loan Losses	346,000				890,000				346,000	890,000
Allowance for loan losses
Ending balance	346,000				890,000				346,000	890,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	346,000				890,000				346,000	890,000
Commercial Real Estate | General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	1,444,000				1,927,000				1,444,000	1,927,000
Total Allowance for Loan Losses	1,444,000				1,927,000				1,444,000	1,927,000
Allowance for loan losses
Ending balance	1,444,000				1,927,000				1,444,000	1,927,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,444,000				1,927,000				1,444,000	1,927,000
Commercial Real Estate | Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	1,742,000				1,785,000				1,742,000	1,785,000
Total Allowance for Loan Losses	1,742,000				1,785,000				1,742,000	1,785,000
Allowance for loan losses
Ending balance	1,742,000				1,785,000				1,742,000	1,785,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,742,000				1,785,000				1,742,000	1,785,000
Commercial Real Estate | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Commercial Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	413,000				272,000				413,000	272,000	969,000
Allowance for Loans Evaluated Collectively for Impairment	410,000				303,000				410,000	303,000	390,000
Total Allowance for Loan Losses	823,000				575,000				823,000	575,000	1,359,000
Total Allowance for Loan Losses	823,000				575,000				823,000	575,000	1,359,000
Commercial and municipal risk-rated loans receivable	30,932,000				20,382,000				30,932,000	20,382,000
Allowance for loan losses
Beginning balance				575,000				1,359,000	575,000	1,359,000	658,000
Chargeoffs									0	963,000	928,000
Recoveries									0	0	246,000
Provision for loan losses									248,000	179,000	1,383,000
Ending balance	823,000				575,000				823,000	575,000	1,359,000
Ending balance specifically evaluated for impairment	413,000				272,000				413,000	272,000	969,000
Ending balance collectively evaluated for impairment	410,000				303,000				410,000	303,000	390,000
Related loan balances
Ending balance	30,932,000				20,382,000				30,932,000	20,382,000	22,417,000
Ending balance specifically evaluated for impairment	1,380,000				1,284,000				1,380,000	1,284,000	3,354,000
Ending balance collectively evaluated for impairment	29,552,000				19,098,000				29,552,000	19,098,000	19,063,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	823,000				575,000				823,000	575,000	1,359,000
Commercial Construction | Strong 1
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				0				0	0
Commercial Construction | Above Average 2
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	771,000				804,000				771,000	804,000
Commercial Construction | Satisfactory 3
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	1,983,000				871,000				1,983,000	871,000
Commercial Construction | Average 4
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	23,345,000				14,938,000				23,345,000	14,938,000
Commercial Construction | Watch 5
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	1,567,000				26,000				1,567,000	26,000
Commercial Construction | OAEM 6
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	2,519,000				2,948,000				2,519,000	2,948,000
Commercial Construction | Substandard 7
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	747,000				795,000				747,000	795,000
Commercial Construction | Doubtful 8
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				0				0	0
Commercial Construction | Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	413,000				272,000				413,000	272,000
Total Allowance for Loan Losses	413,000				272,000				413,000	272,000
Allowance for loan losses
Ending balance	413,000				272,000				413,000	272,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	413,000				272,000				413,000	272,000
Commercial Construction | General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	186,000				157,000				186,000	157,000
Total Allowance for Loan Losses	186,000				157,000				186,000	157,000
Allowance for loan losses
Ending balance	186,000				157,000				186,000	157,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	186,000				157,000				186,000	157,000
Commercial Construction | Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	224,000				146,000				224,000	146,000
Total Allowance for Loan Losses	224,000				146,000				224,000	146,000
Allowance for loan losses
Ending balance	224,000				146,000				224,000	146,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	224,000				146,000				224,000	146,000
Commercial Construction | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Commercial Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	129,000				841,000				129,000	841,000	652,000
Allowance for Loans Evaluated Collectively for Impairment	1,376,000				1,435,000				1,376,000	1,435,000	1,398,000
Total Allowance for Loan Losses	1,505,000				2,276,000				1,505,000	2,276,000	2,050,000
Total Allowance for Loan Losses	1,505,000				2,276,000				1,505,000	2,276,000	2,050,000
Commercial and municipal risk-rated loans receivable	104,531,000				95,289,000				104,531,000	95,289,000
Allowance for loan losses
Beginning balance				2,276,000				2,050,000	2,276,000	2,050,000	2,063,000
Chargeoffs									989,000	2,583,000	3,215,000
Recoveries									758,000	359,000	113,000
Provision for loan losses									-540,000	2,450,000	3,089,000
Ending balance	1,505,000				2,276,000				1,505,000	2,276,000	2,050,000
Ending balance specifically evaluated for impairment	129,000				841,000				129,000	841,000	652,000
Ending balance collectively evaluated for impairment	1,376,000				1,435,000				1,376,000	1,435,000	1,398,000
Related loan balances
Ending balance	104,531,000				95,289,000				104,531,000	95,289,000	81,183,000
Ending balance specifically evaluated for impairment	2,942,000				6,698,000				2,942,000	6,698,000	5,861,000
Ending balance collectively evaluated for impairment	101,589,000				88,591,000				101,589,000	88,591,000	75,322,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,505,000				2,276,000				1,505,000	2,276,000	2,050,000
Commercial Other | Strong 1
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	330,000				265,000				330,000	265,000
Commercial Other | Above Average 2
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	7,210,000				6,719,000				7,210,000	6,719,000
Commercial Other | Satisfactory 3
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	24,232,000				14,852,000				24,232,000	14,852,000
Commercial Other | Average 4
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	44,895,000				45,792,000				44,895,000	45,792,000
Commercial Other | Watch 5
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	18,171,000				10,439,000				18,171,000	10,439,000
Commercial Other | OAEM 6
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	1,970,000				3,238,000				1,970,000	3,238,000
Commercial Other | Substandard 7
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	7,723,000				13,622,000				7,723,000	13,622,000
Commercial Other | Doubtful 8
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				362,000				0	362,000
Commercial Other | Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	129,000				841,000				129,000	841,000
Total Allowance for Loan Losses	129,000				841,000				129,000	841,000
Allowance for loan losses
Ending balance	129,000				841,000				129,000	841,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	129,000				841,000				129,000	841,000
Commercial Other | General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	624,000				745,000				624,000	745,000
Total Allowance for Loan Losses	624,000				745,000				624,000	745,000
Allowance for loan losses
Ending balance	624,000				745,000				624,000	745,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	624,000				745,000				624,000	745,000
Commercial Other | Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	752,000				690,000				752,000	690,000
Total Allowance for Loan Losses	752,000				690,000				752,000	690,000
Allowance for loan losses
Ending balance	752,000				690,000				752,000	690,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	752,000				690,000				752,000	690,000
Commercial Other | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Municipal
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	0				0				0	0	0
Allowance for Loans Evaluated Collectively for Impairment	15,000				15,000				15,000	15,000	18,000
Total Allowance for Loan Losses	15,000				15,000				15,000	15,000	18,000
Total Allowance for Loan Losses	15,000				15,000				15,000	15,000	18,000
Commercial and municipal risk-rated loans receivable	20,424,000				19,117,000				20,424,000	19,117,000
Allowance for loan losses
Beginning balance				15,000				18,000	15,000	18,000	19,000
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision for loan losses									0	-3,000	-1,000
Ending balance	15,000				15,000				15,000	15,000	18,000
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	15,000				15,000				15,000	15,000	18,000
Related loan balances
Ending balance	20,424,000				19,117,000				20,424,000	19,117,000	14,704,000
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	20,424,000				19,117,000				20,424,000	19,117,000	14,704,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	15,000				15,000				15,000	15,000	18,000
Municipal | Strong 1
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				0				0	0
Municipal | Above Average 2
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	18,789,000				16,230,000				18,789,000	16,230,000
Municipal | Satisfactory 3
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	1,635,000				2,887,000				1,635,000	2,887,000
Municipal | Average 4
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				0				0	0
Municipal | Watch 5
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				0				0	0
Municipal | OAEM 6
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				0				0	0
Municipal | Substandard 7
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				0				0	0
Municipal | Doubtful 8
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable	0				0				0	0
Municipal | Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Municipal | General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Municipal | Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	15,000				15,000				15,000	15,000
Total Allowance for Loan Losses	15,000				15,000				15,000	15,000
Allowance for loan losses
Ending balance	15,000				15,000				15,000	15,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	15,000				15,000				15,000	15,000
Municipal | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Residential Term
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	519,000				404,000				519,000	404,000	395,000
Allowance for Loans Evaluated Collectively for Impairment	666,000				695,000				666,000	695,000	714,000
Total Allowance for Loan Losses	1,185,000				1,099,000				1,185,000	1,099,000	1,109,000
Total Allowance for Loan Losses	1,185,000				1,099,000				1,185,000	1,099,000	1,109,000
Allowance for loan losses
Beginning balance				1,099,000				1,109,000	1,099,000	1,109,000	1,159,000
Chargeoffs									699,000	1,118,000	1,911,000
Recoveries									36,000	103,000	110,000
Provision for loan losses									749,000	1,005,000	1,751,000
Ending balance	1,185,000				1,099,000				1,185,000	1,099,000	1,109,000
Ending balance specifically evaluated for impairment	519,000				404,000				519,000	404,000	395,000
Ending balance collectively evaluated for impairment	666,000				695,000				666,000	695,000	714,000
Related loan balances
Ending balance	384,032,000				377,218,000				384,032,000	377,218,000	379,447,000
Ending balance specifically evaluated for impairment	16,123,000				17,786,000				16,123,000	17,786,000	19,444,000
Ending balance collectively evaluated for impairment	367,909,000				359,432,000				367,909,000	359,432,000	360,003,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,185,000				1,099,000				1,185,000	1,099,000	1,109,000
Residential Term | Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	519,000				404,000				519,000	404,000
Total Allowance for Loan Losses	519,000				404,000				519,000	404,000
Allowance for loan losses
Ending balance	519,000				404,000				519,000	404,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	519,000				404,000				519,000	404,000
Residential Term | General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	297,000				342,000				297,000	342,000
Total Allowance for Loan Losses	297,000				342,000				297,000	342,000
Allowance for loan losses
Ending balance	297,000				342,000				297,000	342,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	297,000				342,000				297,000	342,000
Residential Term | Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	369,000				353,000				369,000	353,000
Total Allowance for Loan Losses	369,000				353,000				369,000	353,000
Allowance for loan losses
Ending balance	369,000				353,000				369,000	353,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	369,000				353,000				369,000	353,000
Residential Term | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Residential Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	0				0				0	0	0
Allowance for Loans Evaluated Collectively for Impairment	20,000				21,000				20,000	21,000	11,000
Total Allowance for Loan Losses	20,000				21,000				20,000	21,000	11,000
Total Allowance for Loan Losses	20,000				21,000				20,000	21,000	11,000
Allowance for loan losses
Beginning balance				21,000				11,000	21,000	11,000	255,000
Chargeoffs									0	0	389,000
Recoveries									25,000	0	54,000
Provision for loan losses									-26,000	10,000	91,000
Ending balance	20,000				21,000				20,000	21,000	11,000
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	20,000				21,000				20,000	21,000	11,000
Related loan balances
Ending balance	12,160,000				11,803,000				12,160,000	11,803,000	6,459,000
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	12,160,000				11,803,000				12,160,000	11,803,000	6,459,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	20,000				21,000				20,000	21,000	11,000
Residential Construction | Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Residential Construction | General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	9,000				10,000				9,000	10,000
Total Allowance for Loan Losses	9,000				10,000				9,000	10,000
Allowance for loan losses
Ending balance	9,000				10,000				9,000	10,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	9,000				10,000				9,000	10,000
Residential Construction | Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	11,000				11,000				11,000	11,000
Total Allowance for Loan Losses	11,000				11,000				11,000	11,000
Allowance for loan losses
Ending balance	11,000				11,000				11,000	11,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	11,000				11,000				11,000	11,000
Residential Construction | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Home equity line of credit
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	396,000				54,000				396,000	54,000	0
Allowance for Loans Evaluated Collectively for Impairment	664,000				621,000				664,000	621,000	654,000
Total Allowance for Loan Losses	1,060,000				675,000				1,060,000	675,000	654,000
Total Allowance for Loan Losses	1,060,000				675,000				1,060,000	675,000	654,000
Allowance for loan losses
Beginning balance				675,000				654,000	675,000	654,000	595,000
Chargeoffs									153,000	611,000	688,000
Recoveries									16,000	24,000	1,000
Provision for loan losses									522,000	608,000	746,000
Ending balance	1,060,000				675,000				1,060,000	675,000	654,000
Ending balance specifically evaluated for impairment	396,000				54,000				396,000	54,000	0
Ending balance collectively evaluated for impairment	664,000				621,000				664,000	621,000	654,000
Related loan balances
Ending balance	103,521,000				91,549,000				103,521,000	91,549,000	99,082,000
Ending balance specifically evaluated for impairment	2,087,000				1,648,000				2,087,000	1,648,000	1,311,000
Ending balance collectively evaluated for impairment	101,434,000				89,901,000				101,434,000	89,901,000	97,771,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,060,000				675,000				1,060,000	675,000	654,000
Home equity line of credit | Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	396,000				54,000				396,000	54,000
Total Allowance for Loan Losses	396,000				54,000				396,000	54,000
Allowance for loan losses
Ending balance	396,000				54,000				396,000	54,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	396,000				54,000				396,000	54,000
Home equity line of credit | General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	376,000				343,000				376,000	343,000
Total Allowance for Loan Losses	376,000				343,000				376,000	343,000
Allowance for loan losses
Ending balance	376,000				343,000				376,000	343,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	376,000				343,000				376,000	343,000
Home equity line of credit | Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	288,000				278,000				288,000	278,000
Total Allowance for Loan Losses	288,000				278,000				288,000	278,000
Allowance for loan losses
Ending balance	288,000				278,000				288,000	278,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	288,000				278,000				288,000	278,000
Home equity line of credit | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	0				0				0	0	0
Allowance for Loans Evaluated Collectively for Impairment	542,000				573,000				542,000	573,000	592,000
Total Allowance for Loan Losses	542,000				573,000				542,000	573,000	592,000
Total Allowance for Loan Losses	542,000				573,000				542,000	573,000	592,000
Allowance for loan losses
Beginning balance				573,000				592,000	573,000	592,000	584,000
Chargeoffs									449,000	430,000	555,000
Recoveries									196,000	183,000	208,000
Provision for loan losses									222,000	228,000	355,000
Ending balance	542,000				573,000				542,000	573,000	592,000
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	542,000				573,000				542,000	573,000	592,000
Related loan balances
Ending balance	19,653,000				15,066,000				19,653,000	15,066,000	14,657,000
Ending balance specifically evaluated for impairment	26,000				0				26,000	0	0
Ending balance collectively evaluated for impairment	19,627,000				15,066,000				19,627,000	15,066,000	14,657,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	542,000				573,000				542,000	573,000	592,000
Consumer | Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Consumer | General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	346,000				382,000				346,000	382,000
Total Allowance for Loan Losses	346,000				382,000				346,000	382,000
Allowance for loan losses
Ending balance	346,000				382,000				346,000	382,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	346,000				382,000				346,000	382,000
Consumer | Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	196,000				191,000				196,000	191,000
Total Allowance for Loan Losses	196,000				191,000				196,000	191,000
Allowance for loan losses
Ending balance	196,000				191,000				196,000	191,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	196,000				191,000				196,000	191,000
Consumer | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Unallocated Financing Receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment	0				0				0	0	0
Allowance for Loans Evaluated Collectively for Impairment	1,662,000				1,678,000				1,662,000	1,678,000	842,000
Total Allowance for Loan Losses	1,662,000				1,678,000				1,662,000	1,678,000	842,000
Total Allowance for Loan Losses	1,662,000				1,678,000				1,662,000	1,678,000	842,000
Allowance for loan losses
Beginning balance				1,678,000				842,000	1,678,000	842,000	2,008,000
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision for loan losses									-16,000	836,000	-1,166,000
Ending balance	1,662,000				1,678,000				1,662,000	1,678,000	842,000
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	1,662,000				1,678,000				1,662,000	1,678,000	842,000
Related loan balances
Ending balance	0				0				0	0	0
Ending balance specifically evaluated for impairment	0				0				0	0	0
Ending balance collectively evaluated for impairment	0				0				0	0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,662,000				1,678,000				1,662,000	1,678,000	842,000
Unallocated Financing Receivables | Specific Reserves Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Unallocated Financing Receivables | General Reserves Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Unallocated Financing Receivables | Reserve for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0				0				0	0
Total Allowance for Loan Losses	0				0				0	0
Allowance for loan losses
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0				0				0	0
Unallocated Financing Receivables | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	1,662,000				1,678,000				1,662,000	1,678,000
Total Allowance for Loan Losses	1,662,000				1,678,000				1,662,000	1,678,000
Allowance for loan losses
Ending balance	1,662,000				1,678,000				1,662,000	1,678,000
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,662,000				1,678,000				1,662,000	1,678,000
Minimum
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Risk Based Ratios, Weighted-Average Required Reserve as Percent of Total Loans										0.88%
Regulatory Capital Requirements, Estimated Required Reserve										8,700,000
Maximum
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Risk Based Ratios, Weighted-Average Required Reserve as Percent of Total Loans										1.60%
Regulatory Capital Requirements, Estimated Required Reserve										$13,900,000

Premises_and_Equipment_Details

Premises and Equipment (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$36,444	$37,195
Less accumulated depreciation	13,825	13,579
Premises and equipment, net	22,619	23,616
2015	128
2016	79
2017	57
2018	13
2019	4
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	4,532	4,532
Land improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	821	799
Buildings
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	20,481	19,668
Equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$10,610	$12,196

Other_Real_Estate_Owned_Detail

Other Real Estate Owned (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary Other Real Estate Owned [Abstract]
Real estate acquired in settlement of loans	$3,785	$4,807
Real Estate Owned Valuation Allowance [Roll Forward]
Balance at beginning of year	330	373	436
Losses charged to allowance	-313	-544	-460
Provision charged to operating expenses	637	501	397
Balance at end of year	$654	$330	$373

Acquisitions_and_Intangible_As2

Acquisitions and Intangible Assets (Details) (USD $)	12 Months Ended	0 Months Ended
	Dec. 31, 2014	Oct. 26, 2012	Dec. 31, 2013	Jan. 14, 2005
Business Acquisition [Line Items]
Core deposit intangible		432,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Goodwill		2,121,000
Goodwill, Impairment Loss	0
Goodwill	29,805,000		29,805,000
Bank Acquisitions From Camden National Bank
Business Acquisition [Line Items]
Business Combination Recognized Liabilities Assumed Deposits		32,300,000
Business combination purchase premium		2,553,000
Future amortization expense of core deposits acquired [Abstract]
2015	57,000
2016	43,000
2017	43,000
2018	43,000
2019	43,000
Thereafter	131,000
Total	360,000
Bank Acquisition From Camden National Bank [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
FNB Bankshares
Business Acquisition [Line Items]
Goodwill				27,559,000
One time acquisition costs				47,955,000
Acquisition in 2001
Business Acquisition [Line Items]
Goodwill	$125,000

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	limited_partnership								limited_partnership
Federal income tax
Current									$4,282	$3,234	$3,239
Deferred									18	-56	-108
Federal income tax expense									4,300	3,178	3,131
State income tax [Abstract]
State franchise tax									266	247	240
Income tax expense	1,048	1,400	1,155	963	939	955	825	706	4,566	3,425	3,371
Reconciliation between US expected tax rate and actual tax expense
Expected tax expense									6,746	5,736	5,621
Non-taxable income									-2,292	-2,326	-2,096
State franchise tax, net of federal tax benefit									173	160	156
Tax credits									-414	-414	-414
Other									353	269	104
Income tax expense	1,048	1,400	1,155	963	939	955	825	706	4,566	3,425	3,371
Components of deferred tax assets and liabilities
Allowance for loan losses	3,620				4,030				3,620	4,030
OREO	229				116				229	116
Accrued pension and post-retirement	1,725				1,334				1,725	1,334
Unrealized loss on securities available for sale	0				3,549				0	3,549
Goodwill	138				206				138	206
Unrealized loss on securities transferred from available for sale to held to maturity	26				0				26	0
Tax credits, carried forward	0				539				0	539
Restricted stock grants	264				113				264	113
Core deposit intangible	5				0				5	0
Other assets	48				50				48	50
Total deferred tax asset	6,055				9,937				6,055	9,937
Net deferred loan costs	-1,120				-884				-1,120	-884
Depreciation	-2,131				-2,672				-2,131	-2,672
Available-for-Sale Securities, Accumulated Gross Unrealized Loss, before Tax	-1,358				0				-1,358	0
Mortgage servicing rights	-380				-405				-380	-405
Core deposit intangible	0				-99				0	-99
Investment in flow through entities	387				361				387	361
Deferred Tax Liabilities, Prepaid Expenses	210				316				210	316
Total deferred tax liability	-5,586				-4,737				-5,586	-4,737
Net deferred tax asset	469				5,200				469	5,200
Limited partnerships
Limited partnerships held as investments	2								2
Tax credits from investments in limited partnerships									636	636
Amortization of investments in limited partnerships									569	520
Carrying value of investments in limited partnerships	457				1,026				457	1,026
Total exposure to limited partnerships	$3,957				$4,526				$3,957	$4,526

Certificates_of_Deposit_Detail

Certificates of Deposit (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Certificates of deposit by balance [Abstract]
Certificates of deposit less than $100,000	$184,471	$210,321
Certificates $100,000 to $250,000	221,892	278,674
Certificates $250,000 and over	41,138	42,124
Total	447,501	531,119
Maturity of certificates of deposit [Abstract]
2015	340,449
2016	35,322
2017	16,434
2018	21,636
2019	32,890
2020 and thereafter	770
Total	447,501	531,119
Interest expense on certificates of deposit of $100,000 or greater	2,823	3,280	3,358
Less Than $100,000
Certificates of deposit by balance [Abstract]
Total	184,471
Maturity of certificates of deposit [Abstract]
2015	134,198
2016	19,757
2017	8,261
2018	7,476
2019	14,514
2020 and thereafter	265
Total	184,471
Greater Than $100,000 But Less Than $250,000
Certificates of deposit by balance [Abstract]
Total	263,030
Maturity of certificates of deposit [Abstract]
2015	206,251
2016	15,565
2017	8,173
2018	14,160
2019	18,376
2020 and thereafter	505
Total	$263,030

Borrowed_Funds_Details

Borrowed Funds (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
Debt Instrument [Line Items]
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Five	0.00%
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due Thereafter	0.00%	0.00%
Disclosure of Repurchase Agreements [Abstract]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Maximum Amount Available	$232,000,000
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Amount of Available, Unused Funds	26,800,000
Range of Repurchase agreements' maturity dates	one to 365
Amount of Line of credit with correspondent banks	48,000,000
Credit facility with Federal Reserve Bank	92,000,000
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]
Due in Twelve Months Maturity	115,050,000	54,500,000
Due in Year Two Maturity	30,000,000	40,000,000
Due in Year Three Maturity	30,000,000	30,000,000
Due in Year Four Maturity	30,000,000	30,000,000
Due in Year Five Maturity	0	30,000,000
Due Thereafter	141,000	148,000
Total	205,191,000	184,648,000
Repurchase Agreements for municipal and commercial customers	74,725,000	94,477,000
Total	$279,916,000	$279,125,000	$258,636,000	$298,520,000	$253,519,000	$266,777,000	$257,108,000	$261,185,000
Minimum
Debt Instrument [Line Items]
Repurchase Agreement Counterparty, Maturity of Agreements	1 day
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Next Twelve Months	0.22%	0.28%
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Two	2.36%	2.03%
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Three	0.99%	2.36%
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Four	2.25%	0.99%
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Five		2.25%
Securities Sold under Agreements to Repurchase, Stated Rate	0.20%	0.20%
Maximum
Debt Instrument [Line Items]
Repurchase Agreement Counterparty, Maturity of Agreements	365 days
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Next Twelve Months	2.98%	3.20%
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Two	2.44%	2.98%
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Three	3.69%	2.44%
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Four	3.25%	3.69%
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Five		3.25%
Securities Sold under Agreements to Repurchase, Stated Rate	1.89%	1.89%

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	plan
	employee
Defined contribution plan [Abstract]
Defined contribution plan employer maximum percentage match of annual salary based on employee contribution (in hundredths)	3.00%
Defined contribution plan employer maximum percentage of annual profit-sharing contribution to plan for benefit of employee (in hundredths)	2.00%	2.00%	2.00%
Expense related to 401(k) plan	$454,000	$414,000	$363,000
Defined benefit plans, general information	The Bank also provides unfunded, non-qualified deferred compensation payable over two years, as well as unfunded supplemental retirement benefits for certain officers, payable in installments over 20 years upon retirement or death. The agreements consist of individual contracts with differing characteristics that, when taken together, do not constitute a post-retirement plan.
Supplemental retirement benefits, period of benefits to be received	20 years
Pension expense	722,000	309,000	289,000
Accrued pension liability	2,999,000	2,333,000
Number of post-retirement benefit plans	2
Number of active employees aged 50 and over	7
Employee Benefit Plan, Requisite Minimum Age	50 years
Post-retirement benefit plan health insurance subsidy range minimum per month per person	40
Post-retirement benefit plan health insurance subsidy range maximum per month per person	1,200
Expected future benefit payments in 2015	120,000
Expected future benefit payments in 2016	121,000
Expected future benefit payments in 2017	122,000
Expected future benefit payments in 2018	123,000
Expected future benefit payments in 2019	123,000
Expected future benefit payments in 2020 through 2024	590,000
Estimated plan expense	$80,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	35.00%	35.00%

Employee_Benefit_Plans_Accumul

Employee Benefit Plans, Accumulated Post-Retirement Benefit Obligation, Funded Status, and Net Periodic Benefit Cost (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in Benefit Obligations [Roll Forward]
Benefit obligation at beginning of year	$1,479	$1,954	$1,848
Service cost	0	21	16
Interest cost	71	86	107
Benefits paid	-100	-107	-103
Actuarial (gain) loss	478	-475	86
Benefit obligation at end of period	1,928	1,479	1,954
Funded Status of Plan [Abstract]
Benefit obligation at end of period	-1,928	-1,479	-1,954
Unamortized (gain) loss	192	-289	186
Unrecognized transition obligation	0	0	5
Accrued benefit cost	-1,736	-1,768	-1,763
Weighted average discount rate as of December 31	0.043	0.05	0.045
Components of Net Periodic Benefit Cost [Abstract]
Service cost	0	21	16
Interest cost	71	86	107
Amortization of unrecognized transition obligation	0	5	29
Amortization of gain	-12	0	0
Other settlement expense	10	0	0
Net periodic benefit cost	$69	$112	$152
Weighted average discount rate for net periodic cost	0.05	0.045	0.065

Employee_Benefit_Plans_Schedul

Employee Benefit Plans, Schedule of Net Periodic Benefit Cost Not Yet Recognized (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unamortized net actuarial gain (loss)	($192)	$289
Unamortized net actuarial gain (loss)	-478	475	-86
Deferred tax benefit (expense) at 35%	67	-101
Deferred tax benefit (expense) at 35%	-6,055	-9,937
Net unrecognized gain (loss) on postretirement benefit costs	-125	188
Accumulated other comprehensive income (loss)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unamortized net actuarial gain (loss)	0
Deferred tax benefit (expense) at 35%	0
Net unrecognized gain (loss) on postretirement benefit costs	$0

Other_Comprehensive_Income_Los2

Other Comprehensive Income (Loss), Summary of Unrealized Gains and Losses on Available-for-Sale Securities (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss)	$962	($347)	$3,313	$4,824	($2,076)	($779)	($8,903)	($2,462)	$8,752	($14,220)	$503
Accumulated Net Unrealized Investment Gain (Loss)
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of year				-6,591				7,940	-6,591	7,940	7,401
Unrealized gains (losses) arising during the period									15,175	-21,268	2,797
Realized gains during the period									-1,155	-1,087	-1,968
Related deferred taxes									-4,907	7,824	-290
Other comprehensive income (loss)									9,113	-14,531	539
Balance at end of year	$2,522				($6,591)				$2,522	($6,591)	$7,940

Other_Comprehensive_Income_Los3

Other Comprehensive Income (Loss), Summary of Transfer of AFS Securities to HTM (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$0	$0	$0
Net unrealized losses transferred during the period	-23	0	0
Amortization of net unrealized losses	-51	0	0
Related deferred taxes	26	0	0
Net change	-48	0	0
Balance at end of period	($48)	$0	$0

Other_Comprehensive_Income_Los4

Other Comprehensive Income (Loss), Summary of Unrealized Gains and Losses on Postretirement Benefits - (Details) (Accumulated Defined Benefit Plans Adjustment, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Defined Benefit Plans Adjustment
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of year	$188	($123)	($87)
Amortization of unrecognized transition obligation	0	5	29
Change in unamortized net actuarial gain (loss)	-481	475	-86
Related deferred taxes	168	-169	21
Balance at end of year	($125)	$188	($123)

Preferred_and_Common_Stock_Det

Preferred and Common Stock (Details) (USD $)	0 Months Ended	12 Months Ended				48 Months Ended	168 Months Ended	0 Months Ended
	Mar. 28, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 09, 2013	Dec. 31, 2014	8-May-13	Mar. 27, 2013	Aug. 24, 2011	Jan. 09, 2009	Dec. 31, 2001
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Proceeds from issuance of CPP Shares						$25,000,000
Purchase price of CPP Shares (in dollars per share)											$1,000
Cumulative dividend rate of CPP Shares (in hundredths)						5.00%
CPP Shares dividend period (in years)						5 years
CPP Shares dividend rate after first five years (in hundredths)						9.00%
Dividend payment terms						payable quarterly in arrears on February 15, May 15, August 15 and November 15 of each year
Number of shares of common stock issuable pursuant to the Warrants, maximum (in shares)		225,904	225,904	225,904			225,904
Exercise price of the Warrants (in dollars per share)		16.6					16.6
Term of warrants issued (in years)		10 years
Assumptions used in determining fair value of warrants, common stock price (in dollars per share)		$16.60					$16.60
Assumptions used in determining fair value of warrants, dividend yield (in hundredths)		4.70%
Assumptions used in determining fair value of warrants, stock price volatility (in hundredths)		24.43%
Assumptions used in determining fair value of warrants, risk-free interest rate (in hundredths)		2.01%
Expected life of CPP Shares upon issuance (in years)		5 years
Common stock
Payments for Repurchase of Preferred Stock and Preference Stock		0	12,500,000	0
Number of shares available to directors and employees for stock purchase or savings and investment plans (in shares)		700,000					700,000
Number of shares issued under employee savings and investment plan (in shares)		548,434					548,434
Number of shares available for future use under employee savings and investment plan (in shares)		151,566					151,566
Number of shares issued during period, employee benefit plan (in shares)		14,638	11,385		12,451
Number of shares registered with SEC for dividend reinvestment plan (in shares)												600,000
Number of shares issued during period, dividend reinvestment plan (in shares)		12,686	12,008	14,056			225,274
Stock Remaining under Plan, Shares, Dividend Reinvestment Plan		374,726
Number of trading days immediately preceding dividend payment date used in determining per share price of shares purchased		5 days
Proceeds from sale of common stock (in shares)	760,771
Proceeds from sale of common stock	11,649,000	457,000	11,973,000	499,000
Preferred Stock, Value, Outstanding	10,000,000
Series A Preferred Stock
Common stock
Payments for Repurchase of Preferred Stock and Preference Stock								10,000,000	2,500,000	12,500,000
Capital Purchase Program
Common stock
Stock Issued During Period, Value, New Issues		$457,000	$324,000

Stock_Options_and_StockBased_C2

Stock Options and Stock-Based Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 1995	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock reserved for issuance (in shares)						400,000
Vesting Term (In Years)			10 years
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$1,178,000
Compensation cost recognized for options granted	431,000	214,000
Unrecognized compensation costs	412,000	433,000
Granted in 1995 (in shares)	0
Percentage of options vesting two years (in hundredths)			50.00%
Vesting term, option one (in years)			2 years
Percentage of options vesting five years (in hundredths)			50.00%
Vesting term, option two (in years)			5 years
Summary of status and changes of Stock Option Plan [Roll Forward]
Outstanding, beginning of period (in shares)	42,000	42,000
Granted(in shares)	0
Exercised (in shares)	0
Forfeited (in shares)	0
Outstanding, end of period (in shares)	42,000	42,000
Exercisable, end of period (in shares)	42,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding options, weighted average exercise price, beginning of period (in dollars per share)	$18
Granted options, weighted average exercise price (in dollars per share)	$0
Exercised options, weighted average exercise price (in dollars per share)	$0
Forfeited options, weighted average exercise price (in dollars per share)	$0
Outstanding options, weighted average exercise price, end of period (in dollars per share)	$18	$18
Exercisable options, weighted average exercise price, end of period (in dollars per share)	$18
Outstanding options, end of period, weighted average remaining contractual term (in years)	1 month
Exercisable options, end of period, weighted average remaining contractual term (in years)	1 month
Exercised options, aggregate intrinsic value	0
Outstanding options, end of period, aggregate intrinsic value	0
Exercisable options, end of period, aggregate intrinsic value	$0
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)	72,684
2011 Plan | One Year | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	1 year
2011 Plan | Two Years | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	2 years	2 years
2011 Plan | Four Years | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)				4 years	4 years
Restricted stock granted (in shares)		3,808		2,704	1,500
Remaining Term (In Years)		1 year 1 month 6 days		1 year 2 months 12 days	1 month
2011 Plan | Restricted Stock | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)	72,684
Remaining Term (In Years)	1 year 10 months 24 days
2011 Plan | Five Years | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	5 years	5 years		5 years	5 years
Restricted stock granted (in shares)		14,776		7,996	5,500
Remaining Term (In Years)		3 years 1 month 6 days		2 years 2 months 12 days	1 year 1 month 6 days
2011 Plan | Years | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)		8,530		2,027
Remaining Term (In Years)		1 month		2 months
2011 Plan | Three Years [Member] | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)		3 years		3 years
1995 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in 1995 (in shares)			600,000
Summary of status and changes of Stock Option Plan [Roll Forward]
Granted(in shares)			600,000
Plan 2010 | One Year | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)	5,086
Remaining Term (In Years)	1 month
Plan 2010 | Two Years | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)	10,335
Remaining Term (In Years)	1 year
Plan 2010 | Five Years | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)	10,422
Remaining Term (In Years)	4 years

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income (Numerator) [Abstract]
Net income as reported	$3,426	$4,108	$3,747	$3,428	$3,502	$3,365	$3,242	$2,856	$14,709	$12,965	$12,688
Less dividends and amortization of premium on preferred stock									0	384	723
Basic EPS: Income available to common shareholders									14,709	12,581	11,965
Diluted EPS: Income available to common shareholders plus assumed conversions									$14,709	$12,581	$11,965
Shares (Denominator) [Abstract]
Weighted average number of common shares outstanding									10,638,527	10,469,446	9,828,925
Incremental shares									72,337	51,609	17,606
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares)									10,710,864	10,521,055	9,846,531
Per-Share Amount [Abstract]
Basic EPS: Income available to common shareholders (in dollars per share)	$0.32	$0.39	$0.35	$0.32	$0.33	$0.31	$0.29	$0.27	$1.38	$1.20	$1.22
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share)	$0.32	$0.38	$0.35	$0.32	$0.33	$0.31	$0.29	$0.27	$1.37	$1.20	$1.22
Schedule of Outstanding Options And Warrants [Line Items]
Incentive stock options	42,000				42,000				42,000	42,000	42,000
Warrants issued to U.S. Treasury	225,904				225,904				225,904	225,904	225,904
Total Dilutive Securities	267,904				267,904				267,904	267,904	267,904
In-the-Money
Schedule of Outstanding Options And Warrants [Line Items]
Incentive stock options	0				0				0	0	0
Warrants issued to U.S. Treasury	225,904				225,904				225,904	225,904	0
Total Dilutive Securities	225,904				225,904				225,904	225,904	0
Out-of-the-Money
Schedule of Outstanding Options And Warrants [Line Items]
Incentive stock options	42,000				42,000				42,000	42,000	42,000
Warrants issued to U.S. Treasury	0				0				0	0	225,904
Total Dilutive Securities	42,000				42,000				42,000	42,000	267,904

Regulatory_Capital_Requirement2

Regulatory Capital Requirements (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Tier 1 capital to risk-weighted assets [Abstract]
Actual	$128,970,000	$121,967,000
Average assets [Abstract]
Retained earnings from prior two years available for dividends	12,326,000
Non Consolidated
Tier 2 capital to risk-weighted asets [Abstract]
Actual	137,818,000	131,146,000
For capital adequacy purpose	68,524,000	65,996,000
To be well-capitalized under prompt corrective action provisions	85,655,000	82,495,000
Risk-weighted assets [Abstract]
Actual (in hundredths)	16.09%	15.90%
For capital adequacy purpose (in hundredths)	8.00%	8.00%
To be well-capitalized under prompt corrective action provisions (in hundredths)	10.00%	10.00%
Actual (in hundredths)	14.87%	14.65%
For capital adequacy purpose (in hundredths)	4.00%	4.00%
To be well-capitalized under prompt corrective action provisions (in hundredths)	6.00%	6.00%
Tier 1 capital to risk-weighted assets [Abstract]
Actual	127,374,000	120,819,000
For capital adequacy purpose	34,262,000	32,998,000
To be well-capitalized under prompt corrective action provisions	51,393,000	49,497,000
Tier 1 capital to average assets [Abstract]
Actual	127,374,000	120,819,000
For capital adequacy purpose	58,086,000	57,203,000
To be well-capitalized under prompt corrective action provisions	72,607,000	71,504,000
Average assets [Abstract]
Actual (in hundredths)	8.77%	8.45%
For capital adequacy purpose (in hundredths)	4.00%	4.00%
To be well-capitalized under prompt corrective action provisions (in hundredths)	5.00%	5.00%
Consolidated
Tier 2 capital to risk-weighted asets [Abstract]
Actual	139,414,000	132,294,000
For capital adequacy purpose	68,532,000	66,005,000
Risk-weighted assets [Abstract]
Actual (in hundredths)	16.27%	16.03%
For capital adequacy purpose (in hundredths)	8.00%	8.00%
Actual (in hundredths)	15.06%	14.78%
For capital adequacy purpose (in hundredths)	4.00%	4.00%
Tier 1 capital to risk-weighted assets [Abstract]
For capital adequacy purpose	34,266,000	33,002,000
Tier 1 capital to average assets [Abstract]
Actual	128,970,000	121,967,000
For capital adequacy purpose	$58,066,000	$56,280,000
Average assets [Abstract]
Actual (in hundredths)	8.88%	8.67%
For capital adequacy purpose (in hundredths)	4.00%	4.00%

OffBalanceSheet_Financial_Inst2

Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$132,945	$118,221
Unused Lines Of Credit Residential Mortgages
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	65,264	58,265
Other Unused Commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	49,608	48,646
Standby Letters of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	4,480	4,086
Commitments to Extend Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$13,593	$7,224

Fair_Value_Disclosures_Details

Fair Value Disclosures (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Securities available for sale, Fair value disclosure
Allowance for Other Real Estate Owned	$654	$330	$373	$436
Impaired Financing Receivable, Related Allowance, Measured at Fair Value	1,074	1,309
Fair Value, Measurements, Recurring
Securities available for sale, Fair value disclosure
Mortgage-backed securities	151,855	177,729
State and political subdivisions	30,855	126,315
Other equity securities	2,551	1,780
Total assets	185,261	305,824
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Securities available for sale, Fair value disclosure
Mortgage-backed securities	0	0
State and political subdivisions	0	0
Other equity securities	0	0
Total assets	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Securities available for sale, Fair value disclosure
Mortgage-backed securities	151,855	177,729
State and political subdivisions	30,855	126,315
Other equity securities	2,551	1,780
Total assets	185,261	305,824
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Securities available for sale, Fair value disclosure
Mortgage-backed securities	0	0
State and political subdivisions	0	0
Other equity securities	0	0
Total assets	0	0
Fair Value, Measurements, Nonrecurring
Securities available for sale, Fair value disclosure
Total assets	5,694	5,923
Other real estate owned	3,785	4,807
Impaired loans	1,909	1,116
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 1
Securities available for sale, Fair value disclosure
Total assets	0	0
Other real estate owned	0	0
Impaired loans	0	0
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 2
Securities available for sale, Fair value disclosure
Total assets	5,694	5,923
Other real estate owned	3,785	4,807
Impaired loans	1,909	1,116
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3
Securities available for sale, Fair value disclosure
Total assets	0	0
Other real estate owned	0	0
Impaired loans	$0	$0

Fair_Value_Disclosures_Part_2_

Fair Value Disclosures, Part 2 (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Financial assets
Securities available for sale	$185,261				$305,824
Securities to be held to maturity, fair value	279,704				158,336
Restricted equity securities, at cost	13,912				13,912
Residential [Abstract]
Total loans	907,220				864,853
Mortgage servicing rights	2,088				1,948
Financial liabilities
Demand deposits	113,133				106,125
NOW deposits	199,977				151,322
Money market deposits	98,607				86,730
Savings deposits	165,601				149,103
Certificates of deposit	447,501				531,119
Total deposits	1,024,819	1,055,322	1,033,436	1,045,970	1,024,399	1,037,466	1,027,682	975,861
Carrying Amount
Financial assets
Cash and cash equivalents	13,057				16,570
Interest bearing deposits in other banks	3,559				2,562
Securities available for sale	185,261				305,824
Securities to be held to maturity, fair value	275,919				169,277
Restricted equity securities, at cost	13,912				13,912
Loans held for sale					83
Commercial [Abstract]
Municipal	20,406				19,099
Residential [Abstract]
Home equity line of credit	102,258				90,759
Consumer	19,007				14,396
Total loans	907,220				864,853
Mortgage servicing rights	1,086				1,158
Accrued interest receivable	4,748				5,038
Financial liabilities
Demand deposits	113,133				106,125
NOW deposits	199,977				151,322
Money market deposits	98,607				86,730
Savings deposits	165,601				149,103
Certificates of deposit	205,072				226,658
National certificates of deposit	242,429				304,461
Total deposits	1,024,819				1,024,399
Repurchase agreements	74,725				94,477
Federal Home Loan Bank advances	205,191				184,648
Total borrowed funds	279,916				279,125
Accrued interest payable	521				599
Estimate of Fair Value
Financial assets
Cash and cash equivalents	13,057				16,570
Interest bearing deposits in other banks	3,559				2,562
Securities available for sale	185,261				305,824
Securities to be held to maturity, fair value	279,704				158,336
Restricted equity securities, at cost	13,912				13,912
Loans held for sale					83
Commercial [Abstract]
Municipal	20,833				19,358
Residential [Abstract]
Home equity line of credit	101,733				90,542
Consumer	19,207				14,438
Total loans	912,055				870,539
Mortgage servicing rights	2,088				1,948
Accrued interest receivable	4,748				5,038
Financial liabilities
Demand deposits	109,973				96,175
NOW deposits	186,490				129,815
Money market deposits	83,837				67,968
Savings deposits	146,936				122,891
Certificates of deposit	205,360				228,767
National certificates of deposit	242,824				306,346
Total deposits	975,420				951,962
Repurchase agreements	70,783				94,477
Federal Home Loan Bank advances	208,259				189,644
Total borrowed funds	279,042				284,121
Accrued interest payable	521				599
Commercial Real Estate Receivable | Carrying Amount
Commercial [Abstract]
Loans	238,104				240,555
Commercial Real Estate Receivable | Estimate of Fair Value
Commercial [Abstract]
Loans	236,368				239,973
Commercial Construction | Carrying Amount
Commercial [Abstract]
Loans	29,951				19,709
Commercial Construction | Estimate of Fair Value
Commercial [Abstract]
Loans	29,733				19,661
Commercial Other Receivable | Carrying Amount
Commercial [Abstract]
Loans	102,738				92,625
Commercial Other Receivable | Estimate of Fair Value
Commercial [Abstract]
Loans	102,858				92,855
Residential, Term, Financing Receivable | Carrying Amount
Residential [Abstract]
Loans	382,620				375,932
Residential, Term, Financing Receivable | Estimate of Fair Value
Residential [Abstract]
Loans	389,200				381,918
Residential, Construction, Financing Receivables | Carrying Amount
Residential [Abstract]
Loans	12,136				11,778
Residential, Construction, Financing Receivables | Estimate of Fair Value
Residential [Abstract]
Loans	12,123				11,794
Fair Value, Inputs, Level 1
Financial assets
Cash and cash equivalents	13,057				16,570
Interest bearing deposits in other banks	3,559				2,562
Securities available for sale	0				0
Securities to be held to maturity, fair value	0				0
Restricted equity securities, at cost	0				0
Loans held for sale					0
Commercial [Abstract]
Municipal	0				0
Residential [Abstract]
Home equity line of credit	0				0
Consumer	0				0
Total loans	0				0
Mortgage servicing rights	0				0
Accrued interest receivable	0				0
Financial liabilities
Demand deposits	0				0
NOW deposits	0				0
Money market deposits	0				0
Savings deposits	0				0
Certificates of deposit	0				0
National certificates of deposit	0				0
Total deposits	0				0
Repurchase agreements	0				0
Federal Home Loan Bank advances	0				0
Total borrowed funds	0				0
Accrued interest payable	0				0
Fair Value, Inputs, Level 1 | Commercial Real Estate Receivable
Commercial [Abstract]
Loans	0				0
Fair Value, Inputs, Level 1 | Commercial Construction
Commercial [Abstract]
Loans	0				0
Fair Value, Inputs, Level 1 | Commercial Other Receivable
Commercial [Abstract]
Loans	0				0
Fair Value, Inputs, Level 1 | Residential, Term, Financing Receivable
Residential [Abstract]
Loans	0				0
Fair Value, Inputs, Level 1 | Residential, Construction, Financing Receivables
Residential [Abstract]
Loans	0				0
Fair Value, Inputs, Level 2
Financial assets
Cash and cash equivalents	0				0
Interest bearing deposits in other banks	0				0
Securities available for sale	185,261				305,824
Securities to be held to maturity, fair value	279,704				158,336
Restricted equity securities, at cost	13,912				13,912
Loans held for sale					83
Commercial [Abstract]
Municipal	0				0
Residential [Abstract]
Home equity line of credit	488				0
Consumer	0				0
Total loans	1,909				1,116
Mortgage servicing rights	2,088				1,948
Accrued interest receivable	4,748				5,038
Financial liabilities
Demand deposits	109,973				96,175
NOW deposits	186,490				129,815
Money market deposits	83,837				67,968
Savings deposits	146,936				122,891
Certificates of deposit	205,360				228,767
National certificates of deposit	242,824				306,346
Total deposits	975,420				951,962
Repurchase agreements	70,783				94,477
Federal Home Loan Bank advances	208,259				189,644
Total borrowed funds	279,042				284,121
Accrued interest payable	521				599
Fair Value, Inputs, Level 2 | Commercial Real Estate Receivable
Commercial [Abstract]
Loans	431				109
Fair Value, Inputs, Level 2 | Commercial Construction
Commercial [Abstract]
Loans	0				0
Fair Value, Inputs, Level 2 | Commercial Other Receivable
Commercial [Abstract]
Loans	0				229
Fair Value, Inputs, Level 2 | Residential, Term, Financing Receivable
Residential [Abstract]
Loans	990				778
Fair Value, Inputs, Level 2 | Residential, Construction, Financing Receivables
Residential [Abstract]
Loans	0				0
Fair Value, Inputs, Level 3
Financial assets
Cash and cash equivalents	0				0
Interest bearing deposits in other banks	0				0
Securities available for sale	0				0
Securities to be held to maturity, fair value	0				0
Restricted equity securities, at cost	0				0
Loans held for sale					0
Commercial [Abstract]
Municipal	20,833				19,358
Residential [Abstract]
Home equity line of credit	101,245				90,542
Consumer	19,207				14,438
Total loans	910,146				869,423
Mortgage servicing rights	0				0
Accrued interest receivable	0				0
Financial liabilities
Demand deposits	0				0
NOW deposits	0				0
Money market deposits	0				0
Savings deposits	0				0
Certificates of deposit	0				0
National certificates of deposit	0				0
Total deposits	0				0
Repurchase agreements	0				0
Federal Home Loan Bank advances	0				0
Total borrowed funds	0				0
Accrued interest payable	0				0
Fair Value, Inputs, Level 3 | Commercial Real Estate Receivable
Commercial [Abstract]
Loans	235,937				239,864
Fair Value, Inputs, Level 3 | Commercial Construction
Commercial [Abstract]
Loans	29,733				19,661
Fair Value, Inputs, Level 3 | Commercial Other Receivable
Commercial [Abstract]
Loans	102,858				92,626
Fair Value, Inputs, Level 3 | Residential, Term, Financing Receivable
Residential [Abstract]
Loans	388,210				381,140
Fair Value, Inputs, Level 3 | Residential, Construction, Financing Receivables
Residential [Abstract]
Loans	$12,123				$11,794

Other_Operating_Income_and_Exp2

Other Operating Income and Expense (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other operating expense
Advertising and marketing expense	$1,022	$1,117	$935
Accounting and auditing expenses	746	674	630
ATM and interchange expense	760	778	940
Legal fees and expenses	769	482	715
Collections/Foreclosures/Other Real Estate Owned Expense
Other operating expense
Collections/foreclosures/ other real estate owned expense	657	878	606
ATM And Debit Card Income
Other operating income
ATM and debit card income	$2,630	$2,440	$1,994

Condensed_Financial_Informatio2

Condensed Financial Information of Parent (Details) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Mar. 28, 2013	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents		$13,057	$17,167	$20,416	$13,894	$16,570	$20,117	$18,683	$16,523	$13,057	$16,570
Investments		461,180	472,660	502,015	488,553	475,101	490,151	464,999	437,160	461,180	475,101
Premises and equipment		22,619				23,616				22,619	23,616
Goodwill		29,805				29,805				29,805	29,805
Other assets		22,246				27,616				22,246	27,616
Total assets		1,482,131	1,488,637	1,504,080	1,466,117	1,463,963	1,464,749	1,444,496	1,416,787	1,482,131	1,463,963
Liabilities and shareholders' equity
Other liabilities		15,842	15,489	14,675	14,212	14,341	13,853	13,734	16,070	15,842	14,341
Total liabilities		1,320,577				1,317,865				1,320,577	1,317,865
Shareholders' equity
Common stock		107				106				107	106
Additional paid-in capital		59,282				58,395				59,282	58,395
Retained earnings		99,816				94,000				99,816	94,000
Accumulated other comprehensive income (loss)
Net unrealized gain on available for sale securities, net of tax		2,522				-6,591				2,522	-6,591
Total shareholders' equity		161,554	159,190	157,449	152,416	146,098	146,653	145,972	163,671	161,554	146,098	156,323	150,858
Total liabilities and shareholders' equity		1,482,131	1,488,637	1,504,080	1,466,117	1,463,963	1,464,749	1,444,496	1,416,787	1,482,131	1,463,963
Statements of Income
Net securities gains										1,155	1,087	1,968
Loss before income taxes and Bank earnings		4,474	5,508	4,902	4,391	4,441	4,320	4,067	3,562	19,275	16,390	16,059
Applicable tax expense		1,048	1,400	1,155	963	939	955	825	706	4,566	3,425	3,371
Equity in earnings of Bank
Net income		3,426	4,108	3,747	3,428	3,502	3,365	3,242	2,856	14,709	12,965	12,688
Cash flows from operating activities
Net income		3,426	4,108	3,747	3,428	3,502	3,365	3,242	2,856	14,709	12,965	12,688
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation										1,663	1,727	1,314
Equity compensation expense										431	214	85
Net gain on sale or call of securities										-1,155	-1,087	-1,968
Net decrease in other assets and accrued interest										676	1,557	756
Increase (decrease) in other liabilities										378	1,370	1,631
Net cash provided by operating activities										20,463	24,984	25,023
Cash flows from investing activities
Capital expenditures										-1,909	-2,363	-1,726
Net cash used in investing activities										-16,751	-75,957	-19,270
Cash flows from financing activities
Repurchase of preferred stock										0	-12,500	0
Proceeds from sale of common stock	11,649									457	11,973	499
Dividends paid										-8,893	-8,657	-8,310
Net cash used in financing activities										-7,225	52,585	-4,910
Net increase (decrease) in cash and cash equivalents										-3,513	1,612	843
Cash and cash equivalents at beginning of year					16,570				14,958	16,570	14,958	14,115
Cash and cash equivalents at end of year		13,057				16,570				13,057	16,570	14,958
Parent Company
Assets
Cash and cash equivalents		522				1,113				522	1,113
Dividends receivable		2,500				1,500				2,500	1,500
Investments		528				543				528	543
Investment in subsidiary		132,399				117,391				132,399	117,391
Premises and equipment		24				32				24	32
Goodwill		27,559				27,559				27,559	27,559
Other assets		302				203				302	203
Total assets		163,834				148,341				163,834	148,341
Liabilities and shareholders' equity
Dividends payable		2,252				2,134				2,252	2,134
Other liabilities		28				109				28	109
Total liabilities		2,280				2,243				2,280	2,243
Shareholders' equity
Common stock		107				106				107	106
Additional paid-in capital		59,282				58,395				59,282	58,395
Retained earnings		102,125				87,523				102,125	87,523
Accumulated other comprehensive income (loss)
Net unrealized gain on available for sale securities, net of tax		40				74				40	74
Total accumulated other comprehensive income		40				74				40	74
Total shareholders' equity		161,554				146,098				161,554	146,098
Total liabilities and shareholders' equity		163,834				148,341				163,834	148,341
Statements of Income
Interest and dividends on investments										15	10	10
Net securities gains										38	0	0
Total income										53	10	10
Occupancy expense										12	11	8
Other operating expense										604	362	218
Total expense										616	373	226
Loss before income taxes and Bank earnings										-563	-363	-216
Applicable tax expense										-200	-128	-76
Loss before Bank earnings										-363	-235	-140
Equity in earnings of Bank
Remitted										8,850	7,096	9,694
Unremitted										6,222	6,104	3,134
Net income										14,709	12,965	12,688
Cash flows from operating activities
Net income										14,709	12,965	12,688
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation										9	11	8
Equity compensation expense										431	214	85
Net gain on sale or call of securities										-38	0	0
Net decrease in other assets and accrued interest										-98	-132	-15
(Increase) decrease in dividend receivable										-1,050	400	0
Increase (decrease) in other liabilities										105	258	-5
Unremitted										-6,222	-6,104	-3,134
Net cash provided by operating activities										7,846	7,612	9,627
Cash flows from investing activities
Capital expenditures										-1	0	-25
Net cash used in investing activities										-1	0	-25
Cash flows from financing activities
Repurchase of preferred stock										0	-12,500	0
Proceeds from sale of common stock										457	11,973	499
Dividends paid										-8,893	-8,657	-8,310
Net cash used in financing activities										-8,436	-9,184	-7,811
Net increase (decrease) in cash and cash equivalents										-591	-1,572	1,791
Cash and cash equivalents at beginning of year					1,113				2,685	1,113	2,685	894
Cash and cash equivalents at end of year		$522				$1,113				$522	$1,113	$2,685

Quarterly_Information_Details

Quarterly Information (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Balance Sheets
Cash and cash equivalents	$13,057	$17,167	$20,416	$13,894	$16,570	$20,117	$18,683	$16,523	$13,057	$16,570
Interest-bearing deposits in other banks	3,559	773	272	2,935	2,562	787	334	5,941	3,559	2,562
Investments	461,180	472,660	502,015	488,553	475,101	490,151	464,999	437,160	461,180	475,101
Restricted equity securities	13,912	13,912	13,912	13,912	13,912	13,912	13,912	13,912	13,912	13,912
Net loans and loans held for sale	907,220	896,857	880,492	857,315	864,936	851,171	854,448	851,001	907,220	864,936
Other assets	83,203	87,268	86,973	89,508	90,882	88,611	92,120	92,250	83,203	90,882
Total assets	1,482,131	1,488,637	1,504,080	1,466,117	1,463,963	1,464,749	1,444,496	1,416,787	1,482,131	1,463,963
Deposits	1,024,819	1,055,322	1,033,436	1,045,970	1,024,399	1,037,466	1,027,682	975,861	1,024,819	1,024,399
Borrowed funds	279,916	258,636	298,520	253,519	279,125	266,777	257,108	261,185	279,916	279,125
Other liabilities	15,842	15,489	14,675	14,212	14,341	13,853	13,734	16,070	15,842	14,341
Shareholders' equity	161,554	159,190	157,449	152,416	146,098	146,653	145,972	163,671	161,554	146,098	156,323	150,858
Total liabilities and shareholders' equity	1,482,131	1,488,637	1,504,080	1,466,117	1,463,963	1,464,749	1,444,496	1,416,787	1,482,131	1,463,963
Statements of Income
Interest income	12,790	12,869	12,740	12,623	12,767	12,655	12,249	12,265	51,022	49,936	51,825
Interest expense	2,743	2,865	2,905	2,912	3,106	3,150	3,138	3,102	11,425	12,496	12,938
Net interest income	10,047	10,004	9,835	9,711	9,661	9,505	9,111	9,163	39,597	37,440	38,887
Provision for loan losses	300	350	100	400	700	800	1,200	1,500	1,150	4,200	7,835
Net interest income after provision for loan losses	9,747	9,654	9,735	9,311	8,961	8,705	7,911	7,663	38,447	33,240	31,052
Non-interest income	2,602	3,656	2,458	2,332	2,599	2,621	3,579	3,288	11,048	12,087	11,278
Non-interest expense	7,875	7,802	7,291	7,252	7,119	7,006	7,423	7,389	30,220	28,937	26,271
Loss before income taxes and Bank earnings	4,474	5,508	4,902	4,391	4,441	4,320	4,067	3,562	19,275	16,390	16,059
Applicable tax expense	1,048	1,400	1,155	963	939	955	825	706	4,566	3,425	3,371
Net income	3,426	4,108	3,747	3,428	3,502	3,365	3,242	2,856	14,709	12,965	12,688
Basic earnings per common share (in usd per share)	$0.32	$0.39	$0.35	$0.32	$0.33	$0.31	$0.29	$0.27	$1.38	$1.20	$1.22
Diluted earnings per common share (in usd per share)	$0.32	$0.38	$0.35	$0.32	$0.33	$0.31	$0.29	$0.27	$1.37	$1.20	$1.22
Other comprehensive income (loss), net of tax
Net unrealized gain (loss) on securities available for sale	1,295	-319	3,313	4,824	-2,379	-779	-8,907	-2,466	9,113	-14,531	539
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	-20	-28	0	0	0	0	0	0	-48	0	0
Unrecognized gain (loss) on postretirement benefit costs	-313	0	0	0	303	0	4	4	-313	311	-36
Other comprehensive income (loss)	962	-347	3,313	4,824	-2,076	-779	-8,903	-2,462	8,752	-14,220	503
Comprehensive income (loss)	$4,388	$3,761	$7,060	$8,252	$1,426	$2,586	($5,661)	$394	$23,461	($1,255)	$13,191