The First Bancorp, Inc. (FNLC) 10-K 11 Mar 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Mar. 10, 2016	Jun. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	First Bancorp, Inc /ME/
Entity Central Index Key	765,207
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 190,232,000
Entity Common Stock, Shares Outstanding		10,774,319
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 14,299	$ 13,057
Interest-bearing deposits in other banks	4,013	3,559
Securities available for sale	223,039	185,261
Securities to be held to maturity (fair value of $243,123,000 at December 31, 2015, and $279,704,000 at December 31, 2014)	240,023	275,919
Restricted equity securities, at cost	14,257	13,912
Loans held for sale	349	0
Loans	988,638	917,564
Less allowance for loan losses	9,916	10,344
Net loans	978,722	907,220
Accrued interest receivable	4,912	4,748
Premises and equipment, net	21,816	22,619
Other real estate owned	1,532	3,785
Goodwill	29,805	29,805
Other assets	32,043	22,246
Total assets	1,564,810	1,482,131
Liabilities
Demand deposits	130,566	113,133
NOW deposits	242,638	199,977
Money market deposits	92,994	98,607
Savings deposits	206,009	165,601
Certificates of deposit	370,982	447,501
Total deposits	1,043,189	1,024,819
Borrowed funds – short term	222,323	189,775
Borrowed funds – long term	115,134	90,141
Other liabilities	16,666	15,842
Total liabilities	$ 1,397,312	$ 1,320,577
Commitments and contingent liabilities
Shareholders' equity
Common stock, one cent par value per share	$ 108	$ 107
Additional paid-in capital	59,862	59,282
Retained earnings	106,673	99,816
Accumulated other comprehensive income (loss)
Net unrealized gain on securities available for sale	1,123	2,522
Net unrealized loss on securities transferred from available for sale to held to maturity	(112)	(48)
Net unrecognized loss on postretirement benefit costs	(156)	(125)
Total shareholders' equity	167,498	161,554
Total liabilities and shareholders' equity	$ 1,564,810	$ 1,482,131
Common stock
Number of shares authorized (in shares)	18,000,000	18,000,000
Number of shares issued (in shares)	10,753,855	10,724,359
Number of shares outstanding (in shares)	10,753,855	10,724,359
Book value per common share (usd per share)	$ 15.58	$ 15.06
Tangible book value per common share (usd per share)	$ 12.78	$ 12.25

Consolidated Balance Sheets (Au

Consolidated Balance Sheets (Audited) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Securities to be held to maturity, fair value	$ 243,123	$ 279,704
Common stock, par value (usd per share)	$ 0.01	$ 0.01

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest and dividend income
Interest and fees on loans (includes tax-exempt income of $578,000 in 2015, $592,000 in 2014, and $567,000 in 2013)	$ 36,620	$ 35,102	$ 34,897
Interest on deposits with other banks	19	5	8
Interest and dividends on investments (includes tax-exempt income of $5,157,000 in 2015, $5,854,000 in 2014, and $6,065,000 in 2013)	14,171	15,915	15,031
Total interest and dividend income	50,810	51,022	49,936
Interest expense
Interest on deposits	5,285	7,087	7,997
Interest on borrowed funds	4,589	4,338	4,499
Total interest expense	9,874	11,425	12,496
Net interest income	40,936	39,597	37,440
Provision for loan losses	1,550	1,150	4,200
Net interest income after provision for loan losses	39,386	38,447	33,240
Non-interest income
Fiduciary and investment management income	2,258	2,139	1,919
Service charges on deposit accounts	2,384	2,505	2,756
Net securities gains	1,399	1,155	1,087
Mortgage origination and servicing income	1,558	979	2,080
Other operating income	4,631	4,270	4,245
Total non-interest income	12,230	11,048	12,087
Non-interest expense
Salaries and employee benefits	15,080	14,890	14,305
Occupancy expense	2,312	2,215	2,050
Furniture and equipment expense	3,171	2,940	2,656
FDIC insurance premiums	890	1,004	1,143
Amortization of identified intangibles	58	326	326
Other operating expense	8,385	8,845	8,457
Total non-interest expense	29,896	30,220	28,937
Income before income taxes	21,720	19,275	16,390
Applicable tax expense	5,514	4,566	3,425
Net income	$ 16,206	$ 14,709	$ 12,965
Basic earnings per common share (in usd per share)	$ 1.52	$ 1.38	$ 1.20
Diluted earnings per common share (in usd per share)	$ 1.51	$ 1.37	$ 1.20
Other comprehensive income (loss), net of tax
Net unrealized gain (loss) on securities available for sale	$ (1,399)	$ 9,113	$ (14,531)
Net unrealized loss on securities transferred from available for sale to held to maturity, net of amortization	(64)	(48)	0
Net unrecognized gain (loss) on postretirement benefits	(31)	(313)	311
Other comprehensive income (loss)	(1,494)	8,752	(14,220)
Comprehensive income (loss)	$ 14,712	$ 23,461	$ (1,255)

Consolidated Statements of Inc5

Consolidated Statements of Income and Comprehensive Income (Loss) (Audited) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Interest and fees on loans (tax-exempt income)	$ 578	$ 592	$ 567
Interest and dividends on investments (tax-exempt income)	$ 5,157	$ 5,854	$ 6,065

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred stock	Common stock and additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)
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 gain 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	(8,371)			(8,371)
Equity compensation expense	214		$ 214
Amortization of premium for preferred stock issuance		98	$ (98)
Payment for repurchase of common stock	(12,500)	(12,500)
Issuance of restricted stock (in shares)			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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,428
Net unrealized gain (loss) on securities available for sale, net of tax	4,824
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	0
Balance at Mar. 31, 2014	152,416
Balance at Dec. 31, 2013	146,098	0	$ 58,501	94,000	(6,403)
Balance (in shares) at Dec. 31, 2013			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 gain and transition obligation for post-retirement benefits, net of tax	(313)				(313)
Comprehensive income (loss)	23,461			14,709	8,752
Cash dividends declared	(8,893)			(8,893)
Equity compensation expense	431		$ 431
Issuance of restricted stock (in shares)			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
Balance at Mar. 31, 2014	$ 152,416
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,747
Net unrealized gain (loss) on securities available for sale, net of tax	3,313
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	0
Balance at Jun. 30, 2014	157,449
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,108
Net unrealized gain (loss) on securities available for sale, net of tax	(319)
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(28)
Balance at Sep. 30, 2014	159,190
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,426
Net unrealized gain (loss) on securities available for sale, net of tax	1,295
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(20)
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 4,175
Net unrealized gain (loss) on securities available for sale, net of tax	57
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(19)
Balance at Mar. 31, 2015	163,516
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 16,206			16,206
Net unrealized gain (loss) on securities available for sale, net of tax	(1,399)				(1,399)
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(64)				(64)
Unrecognized gain and transition obligation for post-retirement benefits, net of tax	(31)				(31)
Comprehensive income (loss)	14,712			16,206	(1,494)
Cash dividends declared	(9,349)			(9,349)
Equity compensation expense	296		$ 296
Payment for repurchase of common stock	(180)		$ (180)
Payment for repurchase of common stock (in shares)			(10,138)
Issuance of restricted stock (in shares)			14,179
Proceeds from sale of common stock	465		$ 465
Proceeds from sale of common stock (in shares)			25,455
Balance at Dec. 31, 2015	$ 167,498	0	$ 59,970	106,673	855
Balance (in shares) at Dec. 31, 2015	10,753,855		10,753,855
Balance at Mar. 31, 2015	$ 163,516
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,074
Net unrealized gain (loss) on securities available for sale, net of tax	(1,591)
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(17)
Balance at Jun. 30, 2015	163,809
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,188
Net unrealized gain (loss) on securities available for sale, net of tax	1,330
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(15)
Balance at Sep. 30, 2015	167,141
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,769
Net unrealized gain (loss) on securities available for sale, net of tax	(1,195)
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(13)
Balance at Dec. 31, 2015	$ 167,498	$ 0	$ 59,970	$ 106,673	$ 855
Balance (in shares) at Dec. 31, 2015	10,753,855		10,753,855

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (Audited) (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Cash dividends declared, per share (USD per share)	$ 0.87	$ 0.83	$ 0.785

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Cash Flows [Abstract]
Net income	$ 16,206	$ 14,709	$ 12,965
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,720	1,663	1,727
Change in deferred taxes	332	18	(56)
Provision for loan losses	1,550	1,150	4,200
Loans originated for resale	(31,306)	(21,758)	(56,377)
Proceeds from sales and transfers of loans	31,671	22,337	58,553
Net gain on sales of loans	(714)	(496)	(1,224)
Net gain on sale or call of securities	(1,399)	(1,155)	(1,087)
Net amortization of investment premiums	783	943	1,817
Net (gain) loss on sale of other real estate owned	5	32	(25)
Provision for losses on other real estate owned	311	637	501
Equity compensation expense	296	431	214
Net (increase) decrease in other assets and accrued interest	(455)	676	1,557
Net increase in other liabilities	1,418	378	1,370
Net loss on disposal of premises and equipment	0	3	3
Amortization of investments in limited partnerships	266	569	520
Net acquisition amortization	58	326	326
Net cash provided by operating activities	20,742	20,463	24,984
Cash flows from investing activities
Increase in interest-bearing deposits in other banks	(454)	(997)	(924)
Proceeds from sales of securities available for sale	35,468	15,557	10,563
Proceeds from maturities, payments, calls of securities available for sale	36,588	30,226	55,399
Proceeds from maturities, payments, calls of securities held to maturity	45,688	18,085	36,872
Proceeds from sales of other real estate owned	3,260	2,624	5,416
Purchases of securities available for sale	(111,616)	(908)	(103,359)
Purchases of securities to be held to maturity	(9,644)	(34,881)	(62,727)
Investment in bank-owned life insurance	(10,000)	0	0
Purchase of Federal Home Loan Bank Stock	(345)	0	0
Redemption of restricted equity securities	0	0	536
Net increase in loans	(74,375)	(45,788)	(15,375)
Capital expenditures	(927)	(1,909)	(2,363)
Proceeds from sale of premises and equipment	10	1,240	5
Net cash used in investing activities	(86,347)	(16,751)	(75,957)
Cash flows from financing activities
Net increase in transaction and savings accounts	94,889	84,038	39,486
Net increase (decrease) in certificates of deposit	(76,519)	(83,618)	26,063
Advances on long-term borrowings	55,000	0	0
Repayment on long-term borrowings	(40,000)	(30,000)	(3,780)
Net increase in short-term borrowings	42,541	30,791	0
Repurchase of preferred stock	0	0	(12,500)
Payment to repurchase common stock	(180)	0	0
Proceeds from sale of common stock	465	457	11,973
Dividends paid	(9,349)	(8,893)	(8,657)
Net cash provided by (used in) financing activities	66,847	(7,225)	52,585
Net increase (decrease) in cash and cash equivalents	1,242	(3,513)	1,612
Cash and cash equivalents at beginning of year	13,057	16,570	14,958
Cash and cash equivalents at end of year	14,299	13,057	16,570
Interest paid	9,960	11,503	12,516
Income taxes paid	4,235	5,150	2,000
Non-cash transactions:
Net transfer from loans to other real estate owned	1,323	2,271	3,106
Transfer of securities from available for sale to held to maturity	$ 0	$ 89,757	$ 0

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
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, 2015 , 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 2015 was $14,000 as the expense is now fully amortized. For 2014 and 2013 the annual amortization expense was $283,000 . 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 2015 , 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, 2015 , 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 (Loss) Comprehensive income (loss) 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, First National Bank, 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, 2015
Cash and Cash Equivalents [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, 2015 , the Company had a contractual clearing balance of $500,000 and a reserve balance requirement of $1,956,000 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, 2015
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, 2015 and 2014 : Amortized Unrealized Unrealized Fair Value As of December 31, 2015 Cost Gains Losses (Estimated) Securities available for sale Mortgage-backed securities $ 194,563,000 $ 1,509,000 $ (962,000 ) $ 195,110,000 State and political subdivisions 23,367,000 1,201,000 (62,000 ) 24,506,000 Other equity securities 3,381,000 48,000 (6,000 ) 3,423,000 $ 221,311,000 $ 2,758,000 $ (1,030,000 ) $ 223,039,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 71,000,000 $ 40,000 $ (2,284,000 ) $ 68,756,000 Mortgage-backed securities 42,193,000 1,305,000 (136,000 ) 43,362,000 State and political subdivisions 122,530,000 4,200,000 (25,000 ) 126,705,000 Corporate securities 4,300,000 — — 4,300,000 $ 240,023,000 $ 5,545,000 $ (2,445,000 ) $ 243,123,000 Restricted equity securities Federal Home Loan Bank Stock $ 13,220,000 $ — $ — $ 13,220,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 14,257,000 $ — $ — $ 14,257,000 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 The following table summarizes the contractual maturities of investment securities at December 31, 2015 : 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 $ 527,000 $ 530,000 $ 1,814,000 $ 1,850,000 Due in 1 to 5 years 7,562,000 7,727,000 6,306,000 6,514,000 Due in 5 to 10 years 19,647,000 20,055,000 58,397,000 60,196,000 Due after 10 years 190,194,000 191,304,000 173,506,000 174,563,000 Equity securities 3,381,000 3,423,000 — — $ 221,311,000 $ 223,039,000 $ 240,023,000 $ 243,123,000 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 At December 31, 2015 , securities with a fair value of $201,879,000 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 $164,919,000 as of December 31, 2014 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 2015 , 2014 and 2013 : 2015 2014 2013 Proceeds from sales of securities $ 35,468,000 $ 15,557,000 $ 10,563,000 Gross realized gains 1,399,000 1,155,000 1,087,000 Gross realized losses — — — Net gain $ 1,399,000 $ 1,155,000 $ 1,087,000 Related income taxes $ 490,000 $ 404,000 $ 380,000 Management reviews securities with unrealized losses for other than temporary impairment. As of December 31, 2015 , there were 78 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 15 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, 2015 is summarized below: Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized As of December 31, 2015 Value Losses Value Losses Value Losses U.S. Government-sponsored agencies $ 45,311,000 $ (1,469,000 ) $ 17,185,000 $ (815,000 ) $ 62,496,000 $ (2,284,000 ) Mortgage-backed securities 120,915,000 (1,027,000 ) 910,000 (71,000 ) 121,825,000 (1,098,000 ) State and political subdivisions 2,528,000 (24,000 ) 2,901,000 (63,000 ) 5,429,000 (87,000 ) Other equity securities 64,000 (5,000 ) 52,000 (1,000 ) 116,000 (6,000 ) $ 168,818,000 $ (2,525,000 ) $ 21,048,000 $ (950,000 ) $ 189,866,000 $ (3,475,000 ) 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. 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 ) 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 $112,000 at December 31, 2015 . 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, 2015 and 2014 , the Bank's investment in FHLB stock totaled $13,220,000 and $12,875,000 , respectfully. 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, 2015 . The Bank will continue to monitor its investment in FHLB stock.

Mortgage Servicing Rights

Mortgage Servicing Rights	12 Months Ended
	Dec. 31, 2015
Transfers and Servicing [Abstract]
Mortgage Servicing Rights	Mortgage Servicing Rights At December 31, 2015 and 2014 , the Bank serviced loans for others totaling $223,610,000 and $214,086,000 , respectively. Net gains from the sale of loans totaled $714,000 in 2015 , $496,000 in 2014 , and $1,224,000 in 2013 . In 2015 , mortgage servicing rights of $487,000 were capitalized and amortization for the year totaled $449,000 . At December 31, 2015 , mortgage servicing rights had a fair value of $1,915,000 . 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 . 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, 2015 , the prepayment assumption using the PSA model was 163 , which translates into an anticipated prepayment rate of 9.76% . The discount rate is the quarterly average ten -year U.S. Treasury interest rate plus 5.28% . 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, 2015 2014 Mortgage servicing rights $ 5,747,000 $ 6,039,000 Accumulated amortization (4,619,000 ) (4,949,000 ) Impairment reserve (35,000 ) (4,000 ) $ 1,093,000 $ 1,086,000

Loans

Loans	12 Months Ended
	Dec. 31, 2015
Loans and Leases Receivable Disclosure [Abstract]
Loans	Loans The following table shows the composition of the Company's loan portfolio as of December 31, 2015 and 2014 : December 31, 2015 December 31, 2014 Commercial Real estate $ 269,462,000 27.3 % $ 242,311,000 26.4 % Construction 24,881,000 2.5 % 30,932,000 3.4 % Other 128,341,000 13.0 % 104,531,000 11.4 % Municipal 19,751,000 2.0 % 20,424,000 2.2 % Residential Term 403,030,000 40.7 % 384,032,000 41.9 % Construction 8,451,000 0.9 % 12,160,000 1.3 % Home equity line of credit 110,202,000 11.1 % 103,521,000 11.3 % Consumer 24,520,000 2.5 % 19,653,000 2.1 % Total loans $ 988,638,000 100.0 % $ 917,564,000 100.0 % Loan balances include net deferred loan costs of $3,686,000 in 2015 and $2,729,000 in 2014 . Pursuant to collateral agreements, qualifying first mortgage loans, which were valued at $279,463,000 and $266,716,000 at December 31, 2015 and 2014 , respectively, were used to collateralize borrowings from the Federal Home Loan Bank of Boston. In addition, commercial, construction and home equity loans totaling $243,578,000 at December 31, 2015 and $240,943,000 at December 2014 , were used to collateralize a standby line of credit at the Federal Reserve Bank of Boston that is currently unused. At December 31, 2015 and 2014 , non-accrual loans were $7,372,000 and $10,510,000 , respectively. For the years ended December 31, 2015 , 2014 and 2013 , interest income which would have been recognized on these loans, if interest had been accrued, was $369,000 , $551,000 , and $917,000 , respectively. Loans more than 90 days past due accruing interest totaled $136,000 at December 31, 2015 and $181,000 at December 31, 2014 . 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 $31,285,000 at December 31, 2015 and $29,883,000 at December 31, 2014 . A summary of loans to directors and executive officers is as follows: For the years ended December 31, 2015 2014 Balance at beginning of year $ 14,856,000 $ 14,884,000 New loans 7,382,000 8,932,000 Repayments (1,837,000 ) (8,960,000 ) Balance at end of year $ 20,401,000 $ 14,856,000 Information on the past-due status of loans as of December 31, 2015 , 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 $ 603,000 $ — $ 281,000 $ 884,000 $ 268,578,000 $ 269,462,000 $ — Construction 35,000 — 238,000 273,000 24,608,000 24,881,000 — Other 303,000 — 25,000 328,000 128,013,000 128,341,000 25,000 Municipal — — — — 19,751,000 19,751,000 — Residential Term 450,000 2,098,000 2,639,000 5,187,000 397,843,000 403,030,000 100,000 Construction 368,000 — — 368,000 8,083,000 8,451,000 — Home equity line of credit 261,000 255,000 592,000 1,108,000 109,094,000 110,202,000 — Consumer 102,000 26,000 11,000 139,000 24,381,000 24,520,000 11,000 Total $ 2,122,000 $ 2,379,000 $ 3,786,000 $ 8,287,000 $ 980,351,000 $ 988,638,000 $ 136,000 Information on the past-due status of loans as of December 31, 2014 , 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 $ 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 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, 2015 and 2014 is presented in the following table: As of December 31, 2015 2014 Commercial Real estate $ 915,000 $ 2,088,000 Construction 238,000 208,000 Other 66,000 935,000 Municipal — — Residential Term 5,260,000 6,421,000 Construction — — Home equity line of credit 893,000 832,000 Consumer — 26,000 Total $ 7,372,000 $ 10,510,000 Information regarding impaired loans is as follows: For the years ended December 31, 2015 2014 2013 Average investment in impaired loans $ 32,698,000 $ 38,404,000 $ 45,722,000 Interest income recognized on impaired loans, all on cash basis 1,218,000 1,465,000 1,750,000 As of December 31, 2015 2014 Balance of impaired loans $ 29,531,000 $ 35,862,000 Less portion for which no allowance for loan losses is allocated (20,889,000 ) (26,313,000 ) Portion of impaired loan balance for which an allowance for loan losses is allocated $ 8,642,000 $ 9,549,000 Portion of allowance for loan losses allocated to the impaired loan balance $ 754,000 $ 1,803,000 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, 2015 , is presented in the following table: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 7,173,000 $ 7,496,000 $ — $ 8,990,000 $ 301,000 Construction 30,000 30,000 — 3,000 1,000 Other 1,163,000 1,210,000 — 1,893,000 76,000 Municipal — — — — — Residential Term 11,122,000 12,157,000 — 10,480,000 415,000 Construction — — — — — Home equity line of credit 1,401,000 2,054,000 — 1,400,000 43,000 Consumer — — — 42,000 3,000 $ 20,889,000 $ 22,947,000 $ — $ 22,808,000 $ 839,000 With an Allowance Recorded Commercial Real estate $ 3,544,000 $ 3,627,000 $ 89,000 $ 3,066,000 $ 149,000 Construction 996,000 996,000 302,000 1,153,000 44,000 Other 71,000 77,000 8,000 256,000 5,000 Municipal — — — — — Residential Term 3,966,000 4,193,000 326,000 5,228,000 180,000 Construction — — — — — Home equity line of credit 65,000 66,000 29,000 187,000 3,000 Consumer — — — — — $ 8,642,000 $ 8,959,000 $ 754,000 $ 9,890,000 $ 381,000 Total Commercial Real estate $ 10,717,000 $ 11,123,000 $ 89,000 $ 12,056,000 $ 450,000 Construction 1,026,000 1,026,000 302,000 1,156,000 45,000 Other 1,234,000 1,287,000 8,000 2,149,000 80,000 Municipal — — — — — Residential Term 15,088,000 16,350,000 326,000 15,708,000 595,000 Construction — — — — — Home equity line of credit 1,466,000 2,120,000 29,000 1,587,000 45,000 Consumer — — — 42,000 3,000 $ 29,531,000 $ 31,906,000 $ 754,000 $ 32,698,000 $ 1,218,000 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, 2014 , is presented in the following table: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest 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 A breakdown of impaired loans by category as of December 31, 2013 , is presented in the following table: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest 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 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, 2015 , the Company had 84 loans with a value of $23,923,000 that have been restructured. This compares to 94 loans with a value of $27,214,000 classified as TDRs as of December 31, 2014 . 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, 2015 : Number of Loans Balance Specific Reserves Commercial Real estate 15 $ 10,350,000 $ 85,000 Construction 1 788,000 94,000 Other 11 1,168,000 1,000 Municipal — — — Residential Term 53 10,875,000 275,000 Construction — — — Home equity line of credit 4 742,000 — Consumer — — — 84 $ 23,923,000 $ 455,000 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 As of December 31, 2015 , eight of the loans classified as TDRs with a total balance of $1,053,000 were more than 30 days past due. Of these loans, zero 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, 2015 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other — — — Municipal — — — Residential Term 8 1,053,000 46,000 Construction — — — Home equity line of credit — — — Consumer — — — 8 $ 1,053,000 $ 46,000 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 During the year ended December 31, 2015 , two loans were placed on TDR status with a post-modification outstanding balance of $218,000 . 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, 2015 , by class of loan and the associated specific reserve included in the allowance for loan losses as of December 31, 2015 : Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Specific Reserves Commercial Real estate — $ — $ — $ — Construction — — — — Other — — — — Municipal — — — — Residential Term 2 221,000 218,000 — Construction — — — — Home equity line of credit — — — — Consumer — — — — 2 $ 221,000 $ 218,000 $ — During the year ended December 31, 2014 , six loans were placed on TDR status with a post-modification balance of $826,000 . 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 2014 by type of loan and the associated specific reserve included in the allowance for loan losses as of December 31, 2014 : Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Specific Reserves 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 As of December 31, 2015 , Management is aware of six loans classified as TDRs that are involved in bankruptcy with an outstanding balance of $1,079,000 . As of December 31, 2015 , there were 13 loans with an outstanding balance of $1,764,000 that were classified as TDRs and were on non-accrual status, three of which, with an outstanding balance of $262,000 , were in the process of foreclosure. Residential Mortgage Loans in Process of Foreclosure As of December 31, 2015 , there were 16 mortgage loans collateralized by residential real estate in the process of foreclosure with a total balance of $1,513,000 .

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2015
Receivables [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, 2015 and 2014 : As of December 31, 2015 2014 Allowance for Loans Evaluated Individually for Impairment Commercial Real estate $ 89,000 $ 346,000 Construction 302,000 413,000 Other 8,000 129,000 Municipal — — Residential Term 326,000 519,000 Construction — — Home equity line of credit 29,000 396,000 Consumer — — Total $ 754,000 $ 1,803,000 Allowance for Loans Evaluated Collectively for Impairment Commercial Real estate $ 3,031,000 $ 3,186,000 Construction 278,000 410,000 Other 1,444,000 1,376,000 Municipal 17,000 15,000 Residential Term 1,065,000 666,000 Construction 24,000 20,000 Home equity line of credit 864,000 664,000 Consumer 566,000 542,000 Unallocated 1,873,000 1,662,000 Total $ 9,162,000 $ 8,541,000 Total Allowance for Loan Losses Commercial Real estate $ 3,120,000 $ 3,532,000 Construction 580,000 823,000 Other 1,452,000 1,505,000 Municipal 17,000 15,000 Residential Term 1,391,000 1,185,000 Construction 24,000 20,000 Home equity line of credit 893,000 1,060,000 Consumer 566,000 542,000 Unallocated 1,873,000 1,662,000 Total $ 9,916,000 $ 10,344,000 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, 2015 and 2014 , by class of financing receivable and allowance element, is presented in the following tables: As of December 31, 2015 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 $ 89,000 $ 893,000 $ 2,138,000 $ — $ 3,120,000 Construction 302,000 82,000 196,000 — 580,000 Other 8,000 425,000 1,019,000 — 1,452,000 Municipal — — 17,000 — 17,000 Residential Term 326,000 613,000 452,000 — 1,391,000 Construction — 14,000 10,000 — 24,000 Home equity line of credit 29,000 500,000 364,000 — 893,000 Consumer — 331,000 235,000 — 566,000 Unallocated — — — 1,873,000 1,873,000 $ 754,000 $ 2,858,000 $ 4,431,000 $ 1,873,000 $ 9,916,000 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 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 0.45% of related loans as of December 31, 2015 , compared to 0.39% of related loans as of December 31, 2014 . The qualitative portion increased $834,000 between December 31, 2014 and December 31, 2015 . The unallocated component totaled $1,873,000 at December 31, 2015 , or 18.9% of the total reserve. This compares to $1,662,000 or 16.1% as of December 31, 2014 . The increase in the unallocated portion is due to increased loan demand in comparison to previous years. Management feels the increase in the unallocated portion is directionally consistent with this change in demand. The allowance for loan losses as a percent of total loans stood at 1.00% as of December 31, 2015 , compared to 1.13% of total loans as of December 31, 2014 . 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 80% 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, at 23.1% of capital are well under the regulatory guidance of 100.0% of capital at December 31, 2015 . Construction loans and non-owner-occupied commercial real estate loans are at 104.2% of total capital, are below the regulatory limit of 300.0% of capital at December 31, 2015 . 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, 2015 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ 6,000 $ — $ 1,256,000 $ — $ 1,262,000 2 Above average 29,176,000 56,000 7,506,000 18,321,000 55,059,000 3 Satisfactory 52,821,000 2,057,000 28,787,000 1,430,000 85,095,000 4 Average 122,071,000 18,070,000 67,301,000 — 207,442,000 5 Watch 36,075,000 4,490,000 18,135,000 — 58,700,000 6 OAEM 9,742,000 — 2,410,000 — 12,152,000 7 Substandard 19,571,000 208,000 2,946,000 — 22,725,000 8 Doubtful — — — — — Total $ 269,462,000 $ 24,881,000 $ 128,341,000 $ 19,751,000 $ 442,435,000 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, 2014 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- 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 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. One-to four-family residential real estate loans and home equity loans are written down or charged-off no later than 180 days past due, or for residential real estate secured loans having a borrower in bankruptcy, within 60 days of receipt of notification of filing from the bankruptcy court, whichever is sooner. This is subject to completion of a current assessment of the value of the collateral with any outstanding loan balance in excess of the fair value of the property, less costs to sell, written down or charged-off. 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, 2015 . Allowance for loan losses activity for the years ended December 31, 2015 , 2014 and 2013 was as follows: For the year ended December 31, 2015 Commercial Residential Home Equity Line of Credit Real Estate Construction Other Municipal Term Construction Consumer Unallocated Total Allowance for loan losses: Beginning 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 Chargeoffs 280,000 9,000 732,000 — 420,000 — 582,000 350,000 — 2,373,000 Recoveries 2,000 1,000 88,000 — 152,000 — 31,000 121,000 — 395,000 Provision (credit) (134,000 ) (235,000 ) 591,000 2,000 474,000 4,000 384,000 253,000 211,000 1,550,000 Ending balance $ 3,120,000 $ 580,000 $ 1,452,000 $ 17,000 $ 1,391,000 $ 24,000 $ 893,000 $ 566,000 $ 1,873,000 $ 9,916,000 Ending balance specifically evaluated for impairment $ 89,000 $ 302,000 $ 8,000 $ — $ 326,000 $ — $ 29,000 $ — $ — $ 754,000 Ending balance collectively evaluated for impairment $ 3,031,000 $ 278,000 $ 1,444,000 $ 17,000 $ 1,065,000 $ 24,000 $ 864,000 $ 566,000 $ 1,873,000 $ 9,162,000 Related loan balances: Ending balance $ 269,462,000 $ 24,881,000 $ 128,341,000 $ 19,751,000 $ 403,030,000 $ 8,451,000 $ 110,202,000 $ 24,520,000 $ — $ 988,638,000 Ending balance specifically evaluated for impairment $ 10,717,000 $ 1,026,000 $ 1,234,000 $ — $ 15,088,000 $ — $ 1,466,000 $ — $ — $ 29,531,000 Ending balance collectively evaluated for impairment $ 258,745,000 $ 23,855,000 $ 127,107,000 $ 19,751,000 $ 387,942,000 $ 8,451,000 $ 108,736,000 $ 24,520,000 $ — $ 959,107,000 For the year ended December 31, 2014 Commercial Residential Home Equity Line of Credit Real Estate Construction Other Municipal Term Construction 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 Line of Credit Real Estate Construction Other Municipal Term Construction 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

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 Land $ 4,539,000 $ 4,532,000 Land improvements 874,000 821,000 Buildings 20,569,000 20,481,000 Equipment 11,358,000 10,610,000 37,340,000 36,444,000 Less accumulated depreciation 15,524,000 13,825,000 $ 21,816,000 $ 22,619,000 Based on current contractual agreements (leases), Management anticipates rental revenue over the next 5 years to be $111,000 in 2016 , $75,000 in 2017 , $13,000 in 2018 , $4,000 in 2019 and $4,000 in 2020 .

Other Real Estate Owned

Other Real Estate Owned	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 Real estate acquired in settlement of loans $ 1,532,000 $ 3,785,000 Changes in the allowance for losses from other real estate owned were as follows: For the years ended December 31, 2015 2014 2013 Balance at beginning of year $ 654,000 $ 330,000 $ 373,000 Losses charged to allowance (803,000 ) (313,000 ) (544,000 ) Provision charged to operating expenses 311,000 637,000 501,000 Balance at end of year $ 162,000 $ 654,000 $ 330,000

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 2013 Federal income tax Current $ 4,895,000 $ 4,282,000 $ 3,234,000 Deferred 332,000 18,000 (56,000 ) 5,227,000 4,300,000 3,178,000 State franchise tax 287,000 266,000 247,000 $ 5,514,000 $ 4,566,000 $ 3,425,000 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, 2015 2014 2013 Expected tax expense $ 7,602,000 $ 6,746,000 $ 5,736,000 Non-taxable income (2,086,000 ) (2,292,000 ) (2,326,000 ) State franchise tax, net of federal tax benefit 187,000 173,000 160,000 Tax credits (185,000 ) (414,000 ) (414,000 ) Other (4,000 ) 353,000 269,000 $ 5,514,000 $ 4,566,000 $ 3,425,000 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, 2015 and 2014 are as follows: 2015 2014 Allowance for loan losses $ 3,471,000 $ 3,620,000 OREO 57,000 229,000 Accrued pension and post-retirement 1,769,000 1,725,000 Goodwill 70,000 138,000 Unrealized loss on securities transferred from available for sale to held to maturity 60,000 26,000 Restricted stock grants 367,000 264,000 Core deposit intangible 15,000 5,000 Other assets 93,000 48,000 Total deferred tax asset 5,902,000 6,055,000 Net deferred loan costs (1,445,000 ) (1,120,000 ) Depreciation (2,000,000 ) (2,131,000 ) Unrealized gain on securities available for sale (605,000 ) (1,358,000 ) Mortgage servicing rights (382,000 ) (380,000 ) Investment in flow through entities (425,000 ) (387,000 ) Prepaid expense (104,000 ) (210,000 ) Total deferred tax liability (4,961,000 ) (5,586,000 ) Net deferred tax asset $ 941,000 $ 469,000 At December 31, 2015 and 2014, the Company held investments in one and two , respectively, 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 $285,000 and $636,000 for each of the years ended December 31, 2015 and 2014 , respectively, and are recorded as a reduction of income tax expense. Amortization of the investments in the limited partnerships totaled $266,000 and $569,000 for the years ended December 31, 2015 and 2014 , respectively, and is recognized as a component of income tax expense in the consolidated statements of income. The carrying value of these investments was $69,000 and $457,000 at December 31, 2015 and 2014 , respectively, and is recorded in other assets. The Company's total exposure to these limited partnerships was $69,000 and $3,957,000 , at December 31, 2015 and 2014 , 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, 2012 through 2014 .

Certificates of Deposit

Certificates of Deposit	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Certificates of Deposit	Certificates of Deposit The following table represents the breakdown of certificates of deposit at December 31, 2015 and 2014 : December 31, 2015 December 31, 2014 Certificates of deposit < $100,000 $ 158,529,000 $ 184,471,000 Certificates $100,000 to $250,000 175,077,000 221,892,000 Certificates $250,000 and over 37,376,000 41,138,000 $ 370,982,000 $ 447,501,000 At December 31, 2015 , 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 2016 $ 103,815,000 $ 133,679,000 $ 237,494,000 2017 14,785,000 12,591,000 27,376,000 2018 9,563,000 16,246,000 25,809,000 2019 14,838,000 16,857,000 31,695,000 2020 15,438,000 32,158,000 47,596,000 2021 and thereafter 90,000 922,000 1,012,000 $ 158,529,000 $ 212,453,000 $ 370,982,000 Interest on certificates of deposit of $100,000 or more was $2,431,000 , $2,823,000 , and $3,280,000 in 2015 , 2014 and 2013 , respectively.

Borrowed Funds

Borrowed Funds	12 Months Ended
	Dec. 31, 2015
Borrowed Funds [Abstract]
Borrowed Funds	Borrowed Funds Borrowed funds consist of advances from the 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. All FHLB advances as of December 31, 2015 , 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 $141,000,000 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, 2015 and 2014 have the following range of interest rates and maturity dates: As of December 31, 2015 Federal Home Loan Bank Advances 2016 0.41% - 2.44% $ 135,220,000 2017 0.99% - 3.69% 30,000,000 2018 2.25% - 3.25% 30,000,000 2019 0.00% — 2020 1.60% - 1.97% 55,000,000 2021 and thereafter 0.00% 134,000 250,354,000 Repurchase agreements Municipal and commercial customers 0.20% - 1.89% 87,103,000 $ 337,457,000 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

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2015
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 2015 , 2014 , and 2013 . The expense related to the 401(k) plan was $462,000 , $454,000 , and $414,000 in 2015 , 2014 , and 2013 , 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 $312,000 in 2015 , $722,000 in 2014 , and $309,000 in 2013 . As of December 31, 2015 and 2014 , the accrued liability of these plans was $3,088,000 and $2,999,000 , 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, 2015 2014 2013 Change in benefit obligations Benefit obligation at beginning of year: $ 1,928,000 $ 1,479,000 $ 1,954,000 Service cost — — 21,000 Interest cost 80,000 71,000 86,000 Benefits paid (102,000 ) (100,000 ) (107,000 ) Actuarial (gain) loss 61,000 478,000 (475,000 ) Benefit obligation at end of year: $ 1,967,000 $ 1,928,000 $ 1,479,000 Funded status Benefit obligation at end of year $ (1,967,000 ) $ (1,928,000 ) $ (1,479,000 ) Unamortized (gain) loss 240,000 192,000 (289,000 ) Unrecognized transition obligation — — — Accrued benefit cost $ (1,727,000 ) $ (1,736,000 ) $ (1,768,000 ) Weighted average discount rate as of December 31 4.25 % 4.25 % 5.00 % The following table sets forth the net periodic benefit cost: For the years ended December 31, 2015 2014 2013 Components of net periodic benefit cost Service cost $ — $ — $ 21,000 Interest cost 80,000 71,000 86,000 Amortization of unrecognized transition obligation — — 5,000 Amortization of gain — (12,000 ) — Other settlement expense 12,000 10,000 — Net periodic benefit cost $ 92,000 $ 69,000 $ 112,000 Weighted average discount rate for net periodic cost 4.25 % 5.00 % 4.50 % The measurement date for benefit obligations was as of year-end for all years presented. The estimated amount of benefits to be paid in 2016 is $121,000 . For years ending 2017 through 2020 , the estimated amount of benefits to be paid is $122,000 , $122,000 , $122,000 and $122,000 , respectively, and the total estimated amount of benefits to be paid for years ended 2021 through 2025 is $621,000 . Plan expense for 2016 is estimated to be $85,000 . 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, 2015 2014 Portion to Be Recognized in Income in 2016 Unamortized net actuarial loss $ (240,000 ) $ (192,000 ) Deferred tax benefit at 35% 84,000 67,000 — Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss) $ (156,000 ) $ (125,000 ) $ —

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2015
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, 2015 , 2014 and 2013 . For the years ended December 31, 2015 2014 2013 Balance at beginning of year $ 2,522,000 $ (6,591,000 ) $ 7,940,000 Unrealized gains (losses) arising during the period (754,000 ) 15,175,000 (21,268,000 ) Realized gains during the period (1,399,000 ) (1,155,000 ) (1,087,000 ) Related deferred taxes 754,000 (4,907,000 ) 7,824,000 Net change (1,399,000 ) 9,113,000 (14,531,000 ) Balance at end of year $ 1,123,000 $ 2,522,000 $ (6,591,000 ) 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, 2015 , 2014 , and 2013 . For the years ended December 31, 2015 2014 2013 Balance at beginning of period $ (48,000 ) $ — $ — Net unrealized losses transferred during the period — (23,000 ) — Amortization of net unrealized losses (98,000 ) (51,000 ) — Related deferred taxes 34,000 26,000 — Net change (64,000 ) (48,000 ) — Balance at end of period $ (112,000 ) $ (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, 2015 , 2014 , and 2013 : For the years ended December 31, 2015 2014 2013 Unrecognized postretirement benefits at beginning of period $ (125,000 ) $ 188,000 $ (123,000 ) Amortization of unrecognized transition obligation — — 5,000 Change in unamortized net actuarial gain (loss) (48,000 ) (481,000 ) 475,000 Related deferred taxes 17,000 168,000 (169,000 ) Unrecognized postretirement benefits at end of period $ (156,000 ) $ (125,000 ) $ 188,000 The reclassification of unrecognized transition obligation and accumulated losses is a component of net periodic benefit cost (see Note 12) 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, 2015
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, to the U.S. Treasury under the Capital Purchase Program ("the CPP Shares"). The CPP Shares qualified as Tier 1 capital on the Company's books for regulatory purposes and ranked senior to the Company's common stock and senior or at an equal level in the Company's capital structure to any other shares of preferred stock the Company may issue in the future. In three separate transactions in 2012 and 2013, the Company repurchased all of the CPP Shares from the Treasury. 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. 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 will expire after ten years. The Warrants were unchanged as a result of the CPP Shares repurchase transactions. In May 2015, the Treasury sold all of the Warrants to private parties. In accordance with the contractual terms of the Warrants, the number of shares issuable upon exercise of the Warrants and the strike price were adjusted at the time of the sale. As a result of this transaction, the number of shares issuable under the Warrants now stands at 226,819 with a strike price of $16.53 per share. 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, 2015 , 562,224 shares had been issued pursuant to these plans, leaving 137,776 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 13,787 shares in 2015 , 14,638 shares in 2014 , and 11,385 shares in 2013 . 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, 2015 , 236,943 shares have been issued, leaving 363,057 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 11,668 shares in 2015 , 12,686 shares in 2014 , and 12,008 shares in 2013 . 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 $465,000 , $457,000 and $324,000 for the years ended December 31, 2015 , 2014 and 2013 , respectively.

Stock Options and Stock-Based C

Stock Options and Stock-Based Compensation	12 Months Ended
	Dec. 31, 2015
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, 2015 , 86,863 shares of restricted stock had been granted under the 2010 Plan, of which 67,171 shares remain restricted as of December 31, 2015 as detailed in the following table: Year Granted Vesting Term (In Years) Shares Remaining Term (In Years) 2011 5.0 5,500 0.1 2012 4.0 2,704 0.2 2012 5.0 7,996 1.2 2013 3.0 3,808 0.1 2013 5.0 14,776 2.1 2014 2.0 7,786 0.1 2014 5.0 10,422 3.1 2015 1.0 2,156 0.1 2015 5.0 12,023 4.1 67,171 1.9 The compensation cost related to these restricted stock grants was $1,089,000 and will be recognized over the vesting terms of each grant. In 2015 , $296,000 of expense was recognized for these restricted shares, leaving $345,000 in unrecognized expense as of December 31, 2015 . In 2014 , $431,000 of expense was recognized for restricted shares, leaving $412,000 in unrecognized expense as of December 31, 2014 . 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, 2015 , 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, 2015 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, 2014 42,000 $ 18.00 Granted in 2015 — — Exercised in 2015 — — — Expired unexercised in 2015 42,000 18.00 Outstanding at December 31, 2015 — $ — — — Exercisable at December 31, 2015 — $ — — —

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2015
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, 2015 , 2014 and 2013 : Income (Numerator) Shares (Denominator) Per-Share Amount For the year ended December 31, 2015 Net income as reported $ 16,206,000 Basic EPS: Income available to common shareholders 16,206,000 10,674,755 $ 1.52 Effect of dilutive securities: restricted stock and warrants 90,114 Diluted EPS: Income available to common shareholders plus assumed conversions $ 16,206,000 10,764,869 $ 1.51 For the year ended December 31, 2014 Net income as reported $ 14,709,000 Basic EPS: Income available to common shareholders 14,709,000 10,638,527 $ 1.38 Effect of dilutive securities: restricted stock and warrants 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 $ 1.20 Effect of dilutive securities: restricted stock and warrants 51,609 Diluted EPS: Income available to common shareholders plus assumed conversions $ 12,581,000 10,521,055 $ 1.20 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, 2015 , 2014 and 2013 and the amount which are above or below the strike price: Outstanding In-the-Money Out-of-the-Money As of December 31, 2015 Incentive stock options — — — Warrants to private parties 226,819 226,819 — Total dilutive securities 226,819 226,819 — 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

Regulatory Capital Requirements

Regulatory Capital Requirements	12 Months Ended
	Dec. 31, 2015
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 2016 will be 2016 earnings plus retained earnings of $12,738,000 from 2015 and 2014 . 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 of the Currency 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. Financial institution regulators have established guidelines for minimum capital ratios for banks and bank holding companies. The net unrealized gain or loss on securities available for sale is generally not included in computing regulatory capital. During the first quarter of 2015, the Company adopted the new Basel III regulatory capital framework as approved by the federal banking agencies. The adoption of this new framework modified the calculation of the various capital ratios, added a new ratio, common equity tier 1, and revised the adequately and well capitalized thresholds. Additionally, under the new rule, in order to avoid limitations on capital distributions, including dividend payments, the Company must hold a capital conservation buffer above the adequately capitalized risk-based capital ratios. The capital conservation buffer is being phased in from 0.0% for 2015 to 2.50% by 2019. The Company met each of the well-capitalized ratio guidelines at December 31, 2015 . As of December 31, 2015 , 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, common equity 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 adequacy purposes To be well-capitalized under prompt corrective action provisions As of December 31, 2015 Tier 2 capital to $ 144,255,000 $ 74,316,000 $ 92,895,000 risk-weighted assets 15.53 % 8.00 % 10.00 % Tier 1 capital to $ 134,239,000 $ 55,737,000 $ 74,316,000 risk-weighted assets 14.45 % 6.00 % 8.00 % Common equity Tier 1 capital to $ 134,239,000 $ 41,803,000 $ 60,382,000 risk-weighted assets 14.45 % 4.50 % 6.50 % Tier 1 capital to $ 134,239,000 $ 60,885,000 $ 76,106,000 average assets 8.82 % 4.00 % 5.00 % As of December 31, 2014 Tier 2 capital to $ 137,818,000 $ 68,524,000 $ 85,655,000 risk-weighted assets 16.09 % 8.00 % 10.00 % Tier 1 capital to $ 127,374,000 $ 34,262,000 $ 51,393,000 risk-weighted assets 14.87 % 4.00 % 6.00 % Tier 1 capital to $ 127,374,000 $ 58,086,000 $ 72,607,000 average assets 8.77 % 4.00 % 5.00 % The actual and minimum capital amounts and ratios for the Company, on a consolidated basis, are presented in the following table: Actual For capital adequacy purposes To be well-capitalized under prompt corrective action provisions As of December 31, 2015 Tier 2 capital to $ 146,653,000 $ 74,357,000 n/a risk-weighted assets 15.78 % 8.00 % n/a Tier 1 capital to $ 136,637,000 $ 55,767,000 n/a risk-weighted assets 14.70 % 6.00 % n/a Common equity Tier 1 capital to $ 136,637,000 $ 41,826,000 n/a risk-weighted assets 14.70 % 4.50 % n/a Tier 1 capital to $ 136,637,000 $ 62,022,000 n/a average assets 8.81 % 4.00 % n/a As of December 31, 2014 Tier 2 capital to $ 139,414,000 $ 68,532,000 n/a risk-weighted assets 16.27 % 8.00 % n/a Tier 1 capital to $ 128,970,000 $ 34,266,000 n/a risk-weighted assets 15.06 % 4.00 % n/a Tier 1 capital to $ 128,970,000 $ 58,066,000 n/a average assets 8.88 % 4.00 % n/a

Off-Balance-Sheet Financial Ins

Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2015
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 2015 , 2014 or 2013 . 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, 2015 and 2014 , the Bank had the following off-balance-sheet financial instruments, whose contract amounts represent credit risk: As of December 31, 2015 2014 Unused lines, collateralized by residential real estate $ 69,244,000 $ 65,264,000 Other unused commitments 49,833,000 49,608,000 Standby letters of credit 4,098,000 4,480,000 Commitments to extend credit 10,374,000 13,593,000 Total $ 133,549,000 $ 132,945,000 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, 2015
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, 2015 and 2014 . At December 31, 2015 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 195,110,000 $ — $ 195,110,000 State and political subdivisions — 24,506,000 — 24,506,000 Other equity securities — 3,423,000 — 3,423,000 Total assets $ — $ 223,039,000 $ — $ 223,039,000 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 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 $162,000 and $654,000 at December 2015 and 2014 , 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 $292,000 and $1,074,000 at December 31, 2015 and 2014 , respectively. At December 31, 2015 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 1,532,000 $ — $ 1,532,000 Impaired loans — 699,000 — 699,000 Total assets $ — $ 2,231,000 $ — $ 2,231,000 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 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, 2015 were as follows: Carrying Estimated As of December 31, 2015 value fair value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 14,299,000 $ 14,299,000 $ 14,299,000 $ — $ — Interest-bearing deposits in other banks 4,013,000 4,013,000 4,013,000 — — Securities available for sale 223,039,000 223,039,000 — 223,039,000 — Securities to be held to maturity 240,023,000 243,123,000 — 243,123,000 — Restricted equity securities 14,257,000 14,257,000 — 14,257,000 — Loans held for sale 349,000 349,000 — 349,000 — Loans (net of allowance for loan losses) Commercial Real estate 265,616,000 262,763,000 — — 262,763,000 Construction 24,166,000 23,906,000 — — 23,906,000 Other 126,551,000 126,141,000 — — 126,141,000 Municipal 19,730,000 20,331,000 — — 20,331,000 Residential Term 401,315,000 405,315,000 — — 405,315,000 Construction 8,421,000 8,379,000 — — 8,379,000 Home equity line of credit 109,101,000 108,118,000 — 699,000 107,419,000 Consumer 23,822,000 23,754,000 — — 23,754,000 Total loans 978,722,000 978,707,000 — 699,000 978,008,000 Mortgage servicing rights 1,093,000 1,915,000 — 1,915,000 — Accrued interest receivable 4,912,000 4,912,000 — 4,912,000 — Financial liabilities Demand deposits $ 130,566,000 $ 125,651,000 $ — $ 125,651,000 $ — NOW deposits 242,638,000 224,627,000 — 224,627,000 — Money market deposits 92,994,000 82,050,000 — 82,050,000 — Savings deposits 206,009,000 181,010,000 — 181,010,000 — Local certificates of deposit 201,420,000 201,013,000 — 201,013,000 — National certificates of deposit 169,562,000 169,617,000 — 169,617,000 — Total deposits 1,043,189,000 983,968,000 — 983,968,000 — Repurchase agreements 87,103,000 82,168,000 — 82,168,000 — Federal Home Loan Bank advances 250,354,000 250,027,000 — 250,027,000 — Total borrowed funds 337,457,000 332,195,000 — 332,195,000 — Accrued interest payable 435,000 435,000 — 435,000 — 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 held for sale — — — — — 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 —

Other Operating Income and Expe

Other Operating Income and Expense	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 2013 Other operating income ATM and debit card income $ 2,714,000 $ 2,630,000 $ 2,440,000 Other operating expense Advertising and marketing expense $ 1,178,000 $ 1,022,000 $ 1,117,000 Accounting and auditing expenses 797,000 746,000 674,000 Collections/foreclosures/ other real estate owned expense 432,000 657,000 878,000 ATM and interchange expense 814,000 760,000 778,000 Legal fees and expenses 369,000 769,000 482,000

Legal Contingencies

Legal Contingencies	12 Months Ended
	Dec. 31, 2015
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, 2015
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 Information

Condensed Financial Information of Parent	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 Assets Cash and cash equivalents $ 1,431,000 $ 522,000 Dividends receivable 2,500,000 2,500,000 Investments 509,000 528,000 Investment in subsidiary 137,433,000 132,399,000 Premises and equipment 12,000 24,000 Goodwill 27,559,000 27,559,000 Other assets 438,000 302,000 Total assets $ 169,882,000 $ 163,834,000 Liabilities and shareholders' equity Dividends payable $ 2,366,000 $ 2,252,000 Other liabilities 18,000 28,000 Total liabilities 2,384,000 2,280,000 Shareholders' equity Common stock 108,000 107,000 Additional paid-in capital 59,862,000 59,282,000 Retained earnings 107,500,000 102,125,000 Accumulated other comprehensive income Net unrealized gain on available for sale securities, net of tax 28,000 40,000 Total accumulated other comprehensive income 28,000 40,000 Total shareholders' equity 167,498,000 161,554,000 Total liabilities and shareholders' equity $ 169,882,000 $ 163,834,000 Statements of Income For the years ended December 31, 2015 2014 2013 Interest and dividends on investments $ 18,000 $ 15,000 $ 10,000 Net securities gains — 38,000 — Total income 18,000 53,000 10,000 Occupancy expense 12,000 12,000 11,000 Other operating expense 488,000 604,000 362,000 Total expense 500,000 616,000 373,000 Loss before income taxes and Bank earnings (482,000 ) (563,000 ) (363,000 ) Applicable income taxes (172,000 ) (200,000 ) (128,000 ) Loss before Bank earnings (310,000 ) (363,000 ) (235,000 ) Equity in earnings of Bank Remitted 10,000,000 8,850,000 7,096,000 Unremitted 6,516,000 6,222,000 6,104,000 Net income $ 16,206,000 $ 14,709,000 $ 12,965,000 Statements of Cash Flows For the years ended December 31, 2015 2014 2013 Cash flows from operating activities: Net income $ 16,206,000 $ 14,709,000 $ 12,965,000 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation 12,000 9,000 11,000 Equity compensation expense 296,000 431,000 214,000 Gain on sale of investment — (38,000 ) — Increase in other assets (135,000 ) (98,000 ) (132,000 ) (Increase) decrease in dividend receivable (50,000 ) (1,050,000 ) 400,000 Increase in other liabilities 160,000 105,000 258,000 Unremitted earnings of Bank (6,516,000 ) (6,222,000 ) (6,104,000 ) Net cash provided by operating activities 9,973,000 7,846,000 7,612,000 Cash flows from investing activities: Capital expenditures — (1,000 ) — Net cash used in investing activities — (1,000 ) — Cash flows from financing activities: Payment to repurchase preferred stock — — (12,500,000 ) Purchase of common stock (180,000 ) — — Proceeds from sale of common stock 465,000 457,000 11,973,000 Dividends paid (9,349,000 ) (8,893,000 ) (8,657,000 ) Net cash used in financing activities (9,064,000 ) (8,436,000 ) (9,184,000 ) Net increase (decrease) in cash and cash equivalents 909,000 (591,000 ) (1,572,000 ) Cash and cash equivalents at beginning of year 522,000 1,113,000 2,685,000 Cash and cash equivalents at end of year $ 1,431,000 $ 522,000 $ 1,113,000

New Accounting Pronouncements N

New Accounting Pronouncements New Accounting Pronouncements (Notes)	12 Months Ended
	Dec. 31, 2015
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. The ASU did not 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. The ASU did not 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, 2017, 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 did 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 did not have a material effect on the Company's consolidated financial statements. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. The ASU was issued to enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This ASU changes how entities account for equity investments that do not result in consolidation and are not accounted for under the equity method of accounting. The ASU also changes certain disclosure requirements and other aspects of U.S. GAAP, including a requirement for public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The ASU will not have a material effect on the Company's consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The ASU was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Management is reviewing the guidance in the ASU to determine whether it will have a material effect on the Company’s consolidated financial statements .

Quarterly Information

Quarterly Information	12 Months Ended
	Dec. 31, 2015
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 2014Q1 2014Q2 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 Balance Sheets Cash and cash equivalents $ 13,894 $ 20,416 $ 17,167 $ 13,057 $ 13,855 $ 16,481 $ 19,169 $ 14,299 Interest-bearing deposits in other banks 2,935 272 773 3,559 336 24,565 301 4,013 Investments 488,553 502,015 472,660 461,180 418,772 463,064 461,255 463,062 Restricted equity securities 13,912 13,912 13,912 13,912 13,912 13,912 13,912 14,257 Net loans and loans held for sale 857,315 880,492 896,857 907,220 928,973 953,201 953,674 979,071 Other assets 89,508 86,973 87,268 83,203 82,984 82,117 91,361 90,108 Total assets $ 1,466,117 $ 1,504,080 $ 1,488,637 $ 1,482,131 $ 1,458,832 $ 1,553,340 $ 1,539,672 $ 1,564,810 Deposits $ 1,045,970 $ 1,033,436 $ 1,055,322 $ 1,024,819 $ 966,825 $ 1,096,323 $ 1,058,365 $ 1,043,189 Borrowed funds 253,519 298,520 258,636 279,916 312,576 278,013 297,369 337,457 Other liabilities 14,212 14,675 15,489 15,842 15,915 15,195 16,797 16,666 Shareholders' equity 152,416 157,449 159,190 161,554 163,516 163,809 167,141 167,498 Total liabilities & equity $ 1,466,117 $ 1,504,080 $ 1,488,637 $ 1,482,131 $ 1,458,832 $ 1,553,340 $ 1,539,672 $ 1,564,810 Income and Comprehensive Income Statements Interest income $ 12,623 $ 12,740 $ 12,869 $ 12,790 $ 12,365 $ 12,574 $ 12,833 $ 13,038 Interest expense 2,912 2,905 2,865 2,743 2,663 2,496 2,322 2,393 Net interest income 9,711 9,835 10,004 10,047 9,702 10,078 10,511 10,645 Provision for loan losses 400 100 350 300 500 400 200 450 Net interest income after provision for loan losses 9,311 9,735 9,654 9,747 9,202 9,678 10,311 10,195 Non-interest income 2,332 2,458 3,656 2,602 3,658 2,834 2,975 2,763 Non-interest expense 7,252 7,291 7,802 7,875 7,265 6,980 7,707 7,944 Income before taxes 4,391 4,902 5,508 4,474 5,595 5,532 5,579 5,014 Income taxes 963 1,155 1,400 1,048 1,420 1,458 1,391 1,245 Net income $ 3,428 $ 3,747 $ 4,108 $ 3,426 $ 4,175 $ 4,074 $ 4,188 $ 3,769 Basic earnings per share $ 0.32 $ 0.35 $ 0.39 $ 0.32 $ 0.39 $ 0.38 $ 0.39 $ 0.36 Diluted earnings per share $ 0.32 $ 0.35 $ 0.38 $ 0.32 $ 0.39 $ 0.38 $ 0.39 $ 0.35 Other comprehensive income (loss), net of tax Net unrealized gain (loss) on securities available for sale $ 4,824 $ 3,313 $ (319 ) $ 1,295 $ 57 $ (1,591 ) $ 1,330 $ (1,195 ) Net unrealized loss on securities transfered from available for sale to held to maturity — — (28 ) (20 ) (19 ) (17 ) (15 ) (13 ) Unrecognized loss on postretirement benefit costs — — — (313 ) — — — (31 ) Other comprehensive income (loss) $ 4,824 $ 3,313 $ (347 ) $ 962 $ 38 $ (1,608 ) $ 1,315 $ (1,239 ) Comprehensive income $ 8,252 $ 7,060 $ 3,761 $ 4,388 $ 4,213 $ 2,466 $ 5,503 $ 2,530

Summary of Significant Accoun34

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
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, 2015 , 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 2015 was $14,000 as the expense is now fully amortized. For 2014 and 2013 the annual amortization expense was $283,000 . 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 2015 , 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, 2015 , 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 (Loss)	Comprehensive Income (Loss) Comprehensive income (loss) 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, First National Bank, 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	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. The ASU did not 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. The ASU did not 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, 2017, 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 did 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 did not have a material effect on the Company's consolidated financial statements. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. The ASU was issued to enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This ASU changes how entities account for equity investments that do not result in consolidation and are not accounted for under the equity method of accounting. The ASU also changes certain disclosure requirements and other aspects of U.S. GAAP, including a requirement for public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The ASU will not have a material effect on the Company's consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The ASU was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Management is reviewing the guidance in the ASU to determine whether it will have a material effect on the Company’s consolidated financial statements .

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 and 2014 : Amortized Unrealized Unrealized Fair Value As of December 31, 2015 Cost Gains Losses (Estimated) Securities available for sale Mortgage-backed securities $ 194,563,000 $ 1,509,000 $ (962,000 ) $ 195,110,000 State and political subdivisions 23,367,000 1,201,000 (62,000 ) 24,506,000 Other equity securities 3,381,000 48,000 (6,000 ) 3,423,000 $ 221,311,000 $ 2,758,000 $ (1,030,000 ) $ 223,039,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 71,000,000 $ 40,000 $ (2,284,000 ) $ 68,756,000 Mortgage-backed securities 42,193,000 1,305,000 (136,000 ) 43,362,000 State and political subdivisions 122,530,000 4,200,000 (25,000 ) 126,705,000 Corporate securities 4,300,000 — — 4,300,000 $ 240,023,000 $ 5,545,000 $ (2,445,000 ) $ 243,123,000 Restricted equity securities Federal Home Loan Bank Stock $ 13,220,000 $ — $ — $ 13,220,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 14,257,000 $ — $ — $ 14,257,000 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
Contractual Maturities of Investment Securities	The following table summarizes the contractual maturities of investment securities at December 31, 2015 : 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 $ 527,000 $ 530,000 $ 1,814,000 $ 1,850,000 Due in 1 to 5 years 7,562,000 7,727,000 6,306,000 6,514,000 Due in 5 to 10 years 19,647,000 20,055,000 58,397,000 60,196,000 Due after 10 years 190,194,000 191,304,000 173,506,000 174,563,000 Equity securities 3,381,000 3,423,000 — — $ 221,311,000 $ 223,039,000 $ 240,023,000 $ 243,123,000 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
Schedule of Securities Gains and Losses	The following table shows securities gains and losses for 2015 , 2014 and 2013 : 2015 2014 2013 Proceeds from sales of securities $ 35,468,000 $ 15,557,000 $ 10,563,000 Gross realized gains 1,399,000 1,155,000 1,087,000 Gross realized losses — — — Net gain $ 1,399,000 $ 1,155,000 $ 1,087,000 Related income taxes $ 490,000 $ 404,000 $ 380,000
Schedule of Temporary Impairment Losses	Information regarding securities temporarily impaired as of December 31, 2015 is summarized below: Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized As of December 31, 2015 Value Losses Value Losses Value Losses U.S. Government-sponsored agencies $ 45,311,000 $ (1,469,000 ) $ 17,185,000 $ (815,000 ) $ 62,496,000 $ (2,284,000 ) Mortgage-backed securities 120,915,000 (1,027,000 ) 910,000 (71,000 ) 121,825,000 (1,098,000 ) State and political subdivisions 2,528,000 (24,000 ) 2,901,000 (63,000 ) 5,429,000 (87,000 ) Other equity securities 64,000 (5,000 ) 52,000 (1,000 ) 116,000 (6,000 ) $ 168,818,000 $ (2,525,000 ) $ 21,048,000 $ (950,000 ) $ 189,866,000 $ (3,475,000 ) 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. 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 )

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 Mortgage servicing rights $ 5,747,000 $ 6,039,000 Accumulated amortization (4,619,000 ) (4,949,000 ) Impairment reserve (35,000 ) (4,000 ) $ 1,093,000 $ 1,086,000

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 and 2014 : December 31, 2015 December 31, 2014 Commercial Real estate $ 269,462,000 27.3 % $ 242,311,000 26.4 % Construction 24,881,000 2.5 % 30,932,000 3.4 % Other 128,341,000 13.0 % 104,531,000 11.4 % Municipal 19,751,000 2.0 % 20,424,000 2.2 % Residential Term 403,030,000 40.7 % 384,032,000 41.9 % Construction 8,451,000 0.9 % 12,160,000 1.3 % Home equity line of credit 110,202,000 11.1 % 103,521,000 11.3 % Consumer 24,520,000 2.5 % 19,653,000 2.1 % Total loans $ 988,638,000 100.0 % $ 917,564,000 100.0 %
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, 2015 2014 Balance at beginning of year $ 14,856,000 $ 14,884,000 New loans 7,382,000 8,932,000 Repayments (1,837,000 ) (8,960,000 ) Balance at end of year $ 20,401,000 $ 14,856,000
Past Due Loans Aging	Information on the past-due status of loans as of December 31, 2015 , 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 $ 603,000 $ — $ 281,000 $ 884,000 $ 268,578,000 $ 269,462,000 $ — Construction 35,000 — 238,000 273,000 24,608,000 24,881,000 — Other 303,000 — 25,000 328,000 128,013,000 128,341,000 25,000 Municipal — — — — 19,751,000 19,751,000 — Residential Term 450,000 2,098,000 2,639,000 5,187,000 397,843,000 403,030,000 100,000 Construction 368,000 — — 368,000 8,083,000 8,451,000 — Home equity line of credit 261,000 255,000 592,000 1,108,000 109,094,000 110,202,000 — Consumer 102,000 26,000 11,000 139,000 24,381,000 24,520,000 11,000 Total $ 2,122,000 $ 2,379,000 $ 3,786,000 $ 8,287,000 $ 980,351,000 $ 988,638,000 $ 136,000 Information on the past-due status of loans as of December 31, 2014 , 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 $ 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
Nonaccrual Loans	Information on nonaccrual loans as of December 31, 2015 and 2014 is presented in the following table: As of December 31, 2015 2014 Commercial Real estate $ 915,000 $ 2,088,000 Construction 238,000 208,000 Other 66,000 935,000 Municipal — — Residential Term 5,260,000 6,421,000 Construction — — Home equity line of credit 893,000 832,000 Consumer — 26,000 Total $ 7,372,000 $ 10,510,000
Impaired Loans	Information regarding impaired loans is as follows: For the years ended December 31, 2015 2014 2013 Average investment in impaired loans $ 32,698,000 $ 38,404,000 $ 45,722,000 Interest income recognized on impaired loans, all on cash basis 1,218,000 1,465,000 1,750,000 As of December 31, 2015 2014 Balance of impaired loans $ 29,531,000 $ 35,862,000 Less portion for which no allowance for loan losses is allocated (20,889,000 ) (26,313,000 ) Portion of impaired loan balance for which an allowance for loan losses is allocated $ 8,642,000 $ 9,549,000 Portion of allowance for loan losses allocated to the impaired loan balance $ 754,000 $ 1,803,000
Impaired Loans by class of financing receivable	A breakdown of impaired loans by category as of December 31, 2015 , is presented in the following table: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 7,173,000 $ 7,496,000 $ — $ 8,990,000 $ 301,000 Construction 30,000 30,000 — 3,000 1,000 Other 1,163,000 1,210,000 — 1,893,000 76,000 Municipal — — — — — Residential Term 11,122,000 12,157,000 — 10,480,000 415,000 Construction — — — — — Home equity line of credit 1,401,000 2,054,000 — 1,400,000 43,000 Consumer — — — 42,000 3,000 $ 20,889,000 $ 22,947,000 $ — $ 22,808,000 $ 839,000 With an Allowance Recorded Commercial Real estate $ 3,544,000 $ 3,627,000 $ 89,000 $ 3,066,000 $ 149,000 Construction 996,000 996,000 302,000 1,153,000 44,000 Other 71,000 77,000 8,000 256,000 5,000 Municipal — — — — — Residential Term 3,966,000 4,193,000 326,000 5,228,000 180,000 Construction — — — — — Home equity line of credit 65,000 66,000 29,000 187,000 3,000 Consumer — — — — — $ 8,642,000 $ 8,959,000 $ 754,000 $ 9,890,000 $ 381,000 Total Commercial Real estate $ 10,717,000 $ 11,123,000 $ 89,000 $ 12,056,000 $ 450,000 Construction 1,026,000 1,026,000 302,000 1,156,000 45,000 Other 1,234,000 1,287,000 8,000 2,149,000 80,000 Municipal — — — — — Residential Term 15,088,000 16,350,000 326,000 15,708,000 595,000 Construction — — — — — Home equity line of credit 1,466,000 2,120,000 29,000 1,587,000 45,000 Consumer — — — 42,000 3,000 $ 29,531,000 $ 31,906,000 $ 754,000 $ 32,698,000 $ 1,218,000 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, 2014 , is presented in the following table: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest 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 A breakdown of impaired loans by category as of December 31, 2013 , is presented in the following table: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest 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
Troubled Debt Restructurings on Financing Receivables	The following table shows TDRs by class and the specific reserve as of December 31, 2015 : Number of Loans Balance Specific Reserves Commercial Real estate 15 $ 10,350,000 $ 85,000 Construction 1 788,000 94,000 Other 11 1,168,000 1,000 Municipal — — — Residential Term 53 10,875,000 275,000 Construction — — — Home equity line of credit 4 742,000 — Consumer — — — 84 $ 23,923,000 $ 455,000 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 As of December 31, 2015 , eight of the loans classified as TDRs with a total balance of $1,053,000 were more than 30 days past due. Of these loans, zero 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, 2015 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other — — — Municipal — — — Residential Term 8 1,053,000 46,000 Construction — — — Home equity line of credit — — — Consumer — — — 8 $ 1,053,000 $ 46,000 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 During the year ended December 31, 2015 , two loans were placed on TDR status with a post-modification outstanding balance of $218,000 . 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, 2015 , by class of loan and the associated specific reserve included in the allowance for loan losses as of December 31, 2015 : Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Specific Reserves Commercial Real estate — $ — $ — $ — Construction — — — — Other — — — — Municipal — — — — Residential Term 2 221,000 218,000 — Construction — — — — Home equity line of credit — — — — Consumer — — — — 2 $ 221,000 $ 218,000 $ — During the year ended December 31, 2014 , six loans were placed on TDR status with a post-modification balance of $826,000 . 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 2014 by type of loan and the associated specific reserve included in the allowance for loan losses as of December 31, 2014 : Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Specific Reserves 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

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2015
Receivables [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, 2015 and 2014 : As of December 31, 2015 2014 Allowance for Loans Evaluated Individually for Impairment Commercial Real estate $ 89,000 $ 346,000 Construction 302,000 413,000 Other 8,000 129,000 Municipal — — Residential Term 326,000 519,000 Construction — — Home equity line of credit 29,000 396,000 Consumer — — Total $ 754,000 $ 1,803,000 Allowance for Loans Evaluated Collectively for Impairment Commercial Real estate $ 3,031,000 $ 3,186,000 Construction 278,000 410,000 Other 1,444,000 1,376,000 Municipal 17,000 15,000 Residential Term 1,065,000 666,000 Construction 24,000 20,000 Home equity line of credit 864,000 664,000 Consumer 566,000 542,000 Unallocated 1,873,000 1,662,000 Total $ 9,162,000 $ 8,541,000 Total Allowance for Loan Losses Commercial Real estate $ 3,120,000 $ 3,532,000 Construction 580,000 823,000 Other 1,452,000 1,505,000 Municipal 17,000 15,000 Residential Term 1,391,000 1,185,000 Construction 24,000 20,000 Home equity line of credit 893,000 1,060,000 Consumer 566,000 542,000 Unallocated 1,873,000 1,662,000 Total $ 9,916,000 $ 10,344,000
Loan losses by loan segment and allowance element	A breakdown of the allowance for loan losses as of December 31, 2015 and 2014 , by class of financing receivable and allowance element, is presented in the following tables: As of December 31, 2015 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 $ 89,000 $ 893,000 $ 2,138,000 $ — $ 3,120,000 Construction 302,000 82,000 196,000 — 580,000 Other 8,000 425,000 1,019,000 — 1,452,000 Municipal — — 17,000 — 17,000 Residential Term 326,000 613,000 452,000 — 1,391,000 Construction — 14,000 10,000 — 24,000 Home equity line of credit 29,000 500,000 364,000 — 893,000 Consumer — 331,000 235,000 — 566,000 Unallocated — — — 1,873,000 1,873,000 $ 754,000 $ 2,858,000 $ 4,431,000 $ 1,873,000 $ 9,916,000 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
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, 2015 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ 6,000 $ — $ 1,256,000 $ — $ 1,262,000 2 Above average 29,176,000 56,000 7,506,000 18,321,000 55,059,000 3 Satisfactory 52,821,000 2,057,000 28,787,000 1,430,000 85,095,000 4 Average 122,071,000 18,070,000 67,301,000 — 207,442,000 5 Watch 36,075,000 4,490,000 18,135,000 — 58,700,000 6 OAEM 9,742,000 — 2,410,000 — 12,152,000 7 Substandard 19,571,000 208,000 2,946,000 — 22,725,000 8 Doubtful — — — — — Total $ 269,462,000 $ 24,881,000 $ 128,341,000 $ 19,751,000 $ 442,435,000 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, 2014 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- 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
Allowance for Loan Losses Transactions	Allowance for loan losses activity for the years ended December 31, 2015 , 2014 and 2013 was as follows: For the year ended December 31, 2015 Commercial Residential Home Equity Line of Credit Real Estate Construction Other Municipal Term Construction Consumer Unallocated Total Allowance for loan losses: Beginning 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 Chargeoffs 280,000 9,000 732,000 — 420,000 — 582,000 350,000 — 2,373,000 Recoveries 2,000 1,000 88,000 — 152,000 — 31,000 121,000 — 395,000 Provision (credit) (134,000 ) (235,000 ) 591,000 2,000 474,000 4,000 384,000 253,000 211,000 1,550,000 Ending balance $ 3,120,000 $ 580,000 $ 1,452,000 $ 17,000 $ 1,391,000 $ 24,000 $ 893,000 $ 566,000 $ 1,873,000 $ 9,916,000 Ending balance specifically evaluated for impairment $ 89,000 $ 302,000 $ 8,000 $ — $ 326,000 $ — $ 29,000 $ — $ — $ 754,000 Ending balance collectively evaluated for impairment $ 3,031,000 $ 278,000 $ 1,444,000 $ 17,000 $ 1,065,000 $ 24,000 $ 864,000 $ 566,000 $ 1,873,000 $ 9,162,000 Related loan balances: Ending balance $ 269,462,000 $ 24,881,000 $ 128,341,000 $ 19,751,000 $ 403,030,000 $ 8,451,000 $ 110,202,000 $ 24,520,000 $ — $ 988,638,000 Ending balance specifically evaluated for impairment $ 10,717,000 $ 1,026,000 $ 1,234,000 $ — $ 15,088,000 $ — $ 1,466,000 $ — $ — $ 29,531,000 Ending balance collectively evaluated for impairment $ 258,745,000 $ 23,855,000 $ 127,107,000 $ 19,751,000 $ 387,942,000 $ 8,451,000 $ 108,736,000 $ 24,520,000 $ — $ 959,107,000 For the year ended December 31, 2014 Commercial Residential Home Equity Line of Credit Real Estate Construction Other Municipal Term Construction 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 Line of Credit Real Estate Construction Other Municipal Term Construction 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

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and equipment are carried at cost and consist of the following: As of December 31, 2015 2014 Land $ 4,539,000 $ 4,532,000 Land improvements 874,000 821,000 Buildings 20,569,000 20,481,000 Equipment 11,358,000 10,610,000 37,340,000 36,444,000 Less accumulated depreciation 15,524,000 13,825,000 $ 21,816,000 $ 22,619,000

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	12 Months Ended
	Dec. 31, 2015
Real Estate Owned, Disclosure of Detailed Components [Abstract]
Other Real Estate Owned	The following summarizes other real estate owned: As of December 31, 2015 2014 Real estate acquired in settlement of loans $ 1,532,000 $ 3,785,000
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, 2015 2014 2013 Balance at beginning of year $ 654,000 $ 330,000 $ 373,000 Losses charged to allowance (803,000 ) (313,000 ) (544,000 ) Provision charged to operating expenses 311,000 637,000 501,000 Balance at end of year $ 162,000 $ 654,000 $ 330,000

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 2013 Federal income tax Current $ 4,895,000 $ 4,282,000 $ 3,234,000 Deferred 332,000 18,000 (56,000 ) 5,227,000 4,300,000 3,178,000 State franchise tax 287,000 266,000 247,000 $ 5,514,000 $ 4,566,000 $ 3,425,000
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, 2015 2014 2013 Expected tax expense $ 7,602,000 $ 6,746,000 $ 5,736,000 Non-taxable income (2,086,000 ) (2,292,000 ) (2,326,000 ) State franchise tax, net of federal tax benefit 187,000 173,000 160,000 Tax credits (185,000 ) (414,000 ) (414,000 ) Other (4,000 ) 353,000 269,000 $ 5,514,000 $ 4,566,000 $ 3,425,000
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, 2015 and 2014 are as follows: 2015 2014 Allowance for loan losses $ 3,471,000 $ 3,620,000 OREO 57,000 229,000 Accrued pension and post-retirement 1,769,000 1,725,000 Goodwill 70,000 138,000 Unrealized loss on securities transferred from available for sale to held to maturity 60,000 26,000 Restricted stock grants 367,000 264,000 Core deposit intangible 15,000 5,000 Other assets 93,000 48,000 Total deferred tax asset 5,902,000 6,055,000 Net deferred loan costs (1,445,000 ) (1,120,000 ) Depreciation (2,000,000 ) (2,131,000 ) Unrealized gain on securities available for sale (605,000 ) (1,358,000 ) Mortgage servicing rights (382,000 ) (380,000 ) Investment in flow through entities (425,000 ) (387,000 ) Prepaid expense (104,000 ) (210,000 ) Total deferred tax liability (4,961,000 ) (5,586,000 ) Net deferred tax asset $ 941,000 $ 469,000

Certificates of Deposit (Tables

Certificates of Deposit (Tables)	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Certificates of deposit	The following table represents the breakdown of certificates of deposit at December 31, 2015 and 2014 : December 31, 2015 December 31, 2014 Certificates of deposit < $100,000 $ 158,529,000 $ 184,471,000 Certificates $100,000 to $250,000 175,077,000 221,892,000 Certificates $250,000 and over 37,376,000 41,138,000 $ 370,982,000 $ 447,501,000
Maturities of certificates of deposit	At December 31, 2015 , 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 2016 $ 103,815,000 $ 133,679,000 $ 237,494,000 2017 14,785,000 12,591,000 27,376,000 2018 9,563,000 16,246,000 25,809,000 2019 14,838,000 16,857,000 31,695,000 2020 15,438,000 32,158,000 47,596,000 2021 and thereafter 90,000 922,000 1,012,000 $ 158,529,000 $ 212,453,000 $ 370,982,000

Borrowed Funds (Tables)

Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2015
Borrowed Funds [Abstract]
Range of Interest Rates and Maturity Dates of Borrowed Funds	Borrowed funds at December 31, 2015 and 2014 have the following range of interest rates and maturity dates: As of December 31, 2015 Federal Home Loan Bank Advances 2016 0.41% - 2.44% $ 135,220,000 2017 0.99% - 3.69% 30,000,000 2018 2.25% - 3.25% 30,000,000 2019 0.00% — 2020 1.60% - 1.97% 55,000,000 2021 and thereafter 0.00% 134,000 250,354,000 Repurchase agreements Municipal and commercial customers 0.20% - 1.89% 87,103,000 $ 337,457,000 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

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 2013 Change in benefit obligations Benefit obligation at beginning of year: $ 1,928,000 $ 1,479,000 $ 1,954,000 Service cost — — 21,000 Interest cost 80,000 71,000 86,000 Benefits paid (102,000 ) (100,000 ) (107,000 ) Actuarial (gain) loss 61,000 478,000 (475,000 ) Benefit obligation at end of year: $ 1,967,000 $ 1,928,000 $ 1,479,000 Funded status Benefit obligation at end of year $ (1,967,000 ) $ (1,928,000 ) $ (1,479,000 ) Unamortized (gain) loss 240,000 192,000 (289,000 ) Unrecognized transition obligation — — — Accrued benefit cost $ (1,727,000 ) $ (1,736,000 ) $ (1,768,000 ) Weighted average discount rate as of December 31 4.25 % 4.25 % 5.00 %
Schedule of net benefit costs	The following table sets forth the net periodic benefit cost: For the years ended December 31, 2015 2014 2013 Components of net periodic benefit cost Service cost $ — $ — $ 21,000 Interest cost 80,000 71,000 86,000 Amortization of unrecognized transition obligation — — 5,000 Amortization of gain — (12,000 ) — Other settlement expense 12,000 10,000 — Net periodic benefit cost $ 92,000 $ 69,000 $ 112,000 Weighted average discount rate for net periodic cost 4.25 % 5.00 % 4.50 %
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, 2015 2014 Portion to Be Recognized in Income in 2016 Unamortized net actuarial loss $ (240,000 ) $ (192,000 ) Deferred tax benefit at 35% 84,000 67,000 — Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss) $ (156,000 ) $ (125,000 ) $ —

Other Comprehensive Income (L45

Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 , 2014 and 2013 . For the years ended December 31, 2015 2014 2013 Balance at beginning of year $ 2,522,000 $ (6,591,000 ) $ 7,940,000 Unrealized gains (losses) arising during the period (754,000 ) 15,175,000 (21,268,000 ) Realized gains during the period (1,399,000 ) (1,155,000 ) (1,087,000 ) Related deferred taxes 754,000 (4,907,000 ) 7,824,000 Net change (1,399,000 ) 9,113,000 (14,531,000 ) Balance at end of year $ 1,123,000 $ 2,522,000 $ (6,591,000 ) 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, 2015 , 2014 , and 2013 . For the years ended December 31, 2015 2014 2013 Balance at beginning of period $ (48,000 ) $ — $ — Net unrealized losses transferred during the period — (23,000 ) — Amortization of net unrealized losses (98,000 ) (51,000 ) — Related deferred taxes 34,000 26,000 — Net change (64,000 ) (48,000 ) — Balance at end of period $ (112,000 ) $ (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, 2015 , 2014 , and 2013 : For the years ended December 31, 2015 2014 2013 Unrecognized postretirement benefits at beginning of period $ (125,000 ) $ 188,000 $ (123,000 ) Amortization of unrecognized transition obligation — — 5,000 Change in unamortized net actuarial gain (loss) (48,000 ) (481,000 ) 475,000 Related deferred taxes 17,000 168,000 (169,000 ) Unrecognized postretirement benefits at end of period $ (156,000 ) $ (125,000 ) $ 188,000 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, 2015 , 2014 , and 2013 . For the years ended December 31, 2015 2014 2013 Balance at beginning of period $ (48,000 ) $ — $ — Net unrealized losses transferred during the period — (23,000 ) — Amortization of net unrealized losses (98,000 ) (51,000 ) — Related deferred taxes 34,000 26,000 — Net change (64,000 ) (48,000 ) — Balance at end of period $ (112,000 ) $ (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, 2015 , 2014 and 2013 . For the years ended December 31, 2015 2014 2013 Balance at beginning of year $ 2,522,000 $ (6,591,000 ) $ 7,940,000 Unrealized gains (losses) arising during the period (754,000 ) 15,175,000 (21,268,000 ) Realized gains during the period (1,399,000 ) (1,155,000 ) (1,087,000 ) Related deferred taxes 754,000 (4,907,000 ) 7,824,000 Net change (1,399,000 ) 9,113,000 (14,531,000 ) Balance at end of year $ 1,123,000 $ 2,522,000 $ (6,591,000 )

Stock Options and Stock-Based46

Stock Options and Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	As of December 31, 2015 , 86,863 shares of restricted stock had been granted under the 2010 Plan, of which 67,171 shares remain restricted as of December 31, 2015 as detailed in the following table: Year Granted Vesting Term (In Years) Shares Remaining Term (In Years) 2011 5.0 5,500 0.1 2012 4.0 2,704 0.2 2012 5.0 7,996 1.2 2013 3.0 3,808 0.1 2013 5.0 14,776 2.1 2014 2.0 7,786 0.1 2014 5.0 10,422 3.1 2015 1.0 2,156 0.1 2015 5.0 12,023 4.1 67,171 1.9
Schedule of Share-based Compensation, Stock Options, Activity	A summary of the status of outstanding stock options as of December 31, 2015 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, 2014 42,000 $ 18.00 Granted in 2015 — — Exercised in 2015 — — — Expired unexercised in 2015 42,000 18.00 Outstanding at December 31, 2015 — $ — — — Exercisable at December 31, 2015 — $ — — —

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 , 2014 and 2013 : Income (Numerator) Shares (Denominator) Per-Share Amount For the year ended December 31, 2015 Net income as reported $ 16,206,000 Basic EPS: Income available to common shareholders 16,206,000 10,674,755 $ 1.52 Effect of dilutive securities: restricted stock and warrants 90,114 Diluted EPS: Income available to common shareholders plus assumed conversions $ 16,206,000 10,764,869 $ 1.51 For the year ended December 31, 2014 Net income as reported $ 14,709,000 Basic EPS: Income available to common shareholders 14,709,000 10,638,527 $ 1.38 Effect of dilutive securities: restricted stock and warrants 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 $ 1.20 Effect of dilutive securities: restricted stock and warrants 51,609 Diluted EPS: Income available to common shareholders plus assumed conversions $ 12,581,000 10,521,055 $ 1.20
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, 2015 , 2014 and 2013 and the amount which are above or below the strike price: Outstanding In-the-Money Out-of-the-Money As of December 31, 2015 Incentive stock options — — — Warrants to private parties 226,819 226,819 — Total dilutive securities 226,819 226,819 — 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

Regulatory Capital Requiremen48

Regulatory Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2015
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 adequacy purposes To be well-capitalized under prompt corrective action provisions As of December 31, 2015 Tier 2 capital to $ 144,255,000 $ 74,316,000 $ 92,895,000 risk-weighted assets 15.53 % 8.00 % 10.00 % Tier 1 capital to $ 134,239,000 $ 55,737,000 $ 74,316,000 risk-weighted assets 14.45 % 6.00 % 8.00 % Common equity Tier 1 capital to $ 134,239,000 $ 41,803,000 $ 60,382,000 risk-weighted assets 14.45 % 4.50 % 6.50 % Tier 1 capital to $ 134,239,000 $ 60,885,000 $ 76,106,000 average assets 8.82 % 4.00 % 5.00 % As of December 31, 2014 Tier 2 capital to $ 137,818,000 $ 68,524,000 $ 85,655,000 risk-weighted assets 16.09 % 8.00 % 10.00 % Tier 1 capital to $ 127,374,000 $ 34,262,000 $ 51,393,000 risk-weighted assets 14.87 % 4.00 % 6.00 % Tier 1 capital to $ 127,374,000 $ 58,086,000 $ 72,607,000 average assets 8.77 % 4.00 % 5.00 % The actual and minimum capital amounts and ratios for the Company, on a consolidated basis, are presented in the following table: Actual For capital adequacy purposes To be well-capitalized under prompt corrective action provisions As of December 31, 2015 Tier 2 capital to $ 146,653,000 $ 74,357,000 n/a risk-weighted assets 15.78 % 8.00 % n/a Tier 1 capital to $ 136,637,000 $ 55,767,000 n/a risk-weighted assets 14.70 % 6.00 % n/a Common equity Tier 1 capital to $ 136,637,000 $ 41,826,000 n/a risk-weighted assets 14.70 % 4.50 % n/a Tier 1 capital to $ 136,637,000 $ 62,022,000 n/a average assets 8.81 % 4.00 % n/a As of December 31, 2014 Tier 2 capital to $ 139,414,000 $ 68,532,000 n/a risk-weighted assets 16.27 % 8.00 % n/a Tier 1 capital to $ 128,970,000 $ 34,266,000 n/a risk-weighted assets 15.06 % 4.00 % n/a Tier 1 capital to $ 128,970,000 $ 58,066,000 n/a average assets 8.88 % 4.00 % n/a

Off-Balance-Sheet Financial I49

Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Off-Balance-Sheet Financial instruments	At December 31, 2015 and 2014 , the Bank had the following off-balance-sheet financial instruments, whose contract amounts represent credit risk: As of December 31, 2015 2014 Unused lines, collateralized by residential real estate $ 69,244,000 $ 65,264,000 Other unused commitments 49,833,000 49,608,000 Standby letters of credit 4,098,000 4,480,000 Commitments to extend credit 10,374,000 13,593,000 Total $ 133,549,000 $ 132,945,000

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 and 2014 . At December 31, 2015 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 195,110,000 $ — $ 195,110,000 State and political subdivisions — 24,506,000 — 24,506,000 Other equity securities — 3,423,000 — 3,423,000 Total assets $ — $ 223,039,000 $ — $ 223,039,000 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
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 $162,000 and $654,000 at December 2015 and 2014 , 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 $292,000 and $1,074,000 at December 31, 2015 and 2014 , respectively. At December 31, 2015 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 1,532,000 $ — $ 1,532,000 Impaired loans — 699,000 — 699,000 Total assets $ — $ 2,231,000 $ — $ 2,231,000 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
Estimated fair value of financial instruments	The carrying amounts and estimated fair values for financial instruments as of December 31, 2015 were as follows: Carrying Estimated As of December 31, 2015 value fair value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 14,299,000 $ 14,299,000 $ 14,299,000 $ — $ — Interest-bearing deposits in other banks 4,013,000 4,013,000 4,013,000 — — Securities available for sale 223,039,000 223,039,000 — 223,039,000 — Securities to be held to maturity 240,023,000 243,123,000 — 243,123,000 — Restricted equity securities 14,257,000 14,257,000 — 14,257,000 — Loans held for sale 349,000 349,000 — 349,000 — Loans (net of allowance for loan losses) Commercial Real estate 265,616,000 262,763,000 — — 262,763,000 Construction 24,166,000 23,906,000 — — 23,906,000 Other 126,551,000 126,141,000 — — 126,141,000 Municipal 19,730,000 20,331,000 — — 20,331,000 Residential Term 401,315,000 405,315,000 — — 405,315,000 Construction 8,421,000 8,379,000 — — 8,379,000 Home equity line of credit 109,101,000 108,118,000 — 699,000 107,419,000 Consumer 23,822,000 23,754,000 — — 23,754,000 Total loans 978,722,000 978,707,000 — 699,000 978,008,000 Mortgage servicing rights 1,093,000 1,915,000 — 1,915,000 — Accrued interest receivable 4,912,000 4,912,000 — 4,912,000 — Financial liabilities Demand deposits $ 130,566,000 $ 125,651,000 $ — $ 125,651,000 $ — NOW deposits 242,638,000 224,627,000 — 224,627,000 — Money market deposits 92,994,000 82,050,000 — 82,050,000 — Savings deposits 206,009,000 181,010,000 — 181,010,000 — Local certificates of deposit 201,420,000 201,013,000 — 201,013,000 — National certificates of deposit 169,562,000 169,617,000 — 169,617,000 — Total deposits 1,043,189,000 983,968,000 — 983,968,000 — Repurchase agreements 87,103,000 82,168,000 — 82,168,000 — Federal Home Loan Bank advances 250,354,000 250,027,000 — 250,027,000 — Total borrowed funds 337,457,000 332,195,000 — 332,195,000 — Accrued interest payable 435,000 435,000 — 435,000 — 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 held for sale — — — — — 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 —

Other Operating Income and Ex51

Other Operating Income and Expense (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 2013 Other operating income ATM and debit card income $ 2,714,000 $ 2,630,000 $ 2,440,000 Other operating expense Advertising and marketing expense $ 1,178,000 $ 1,022,000 $ 1,117,000 Accounting and auditing expenses 797,000 746,000 674,000 Collections/foreclosures/ other real estate owned expense 432,000 657,000 878,000 ATM and interchange expense 814,000 760,000 778,000 Legal fees and expenses 369,000 769,000 482,000

Condensed Financial Informati52

Condensed Financial Information of Parent (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 2014 Assets Cash and cash equivalents $ 1,431,000 $ 522,000 Dividends receivable 2,500,000 2,500,000 Investments 509,000 528,000 Investment in subsidiary 137,433,000 132,399,000 Premises and equipment 12,000 24,000 Goodwill 27,559,000 27,559,000 Other assets 438,000 302,000 Total assets $ 169,882,000 $ 163,834,000 Liabilities and shareholders' equity Dividends payable $ 2,366,000 $ 2,252,000 Other liabilities 18,000 28,000 Total liabilities 2,384,000 2,280,000 Shareholders' equity Common stock 108,000 107,000 Additional paid-in capital 59,862,000 59,282,000 Retained earnings 107,500,000 102,125,000 Accumulated other comprehensive income Net unrealized gain on available for sale securities, net of tax 28,000 40,000 Total accumulated other comprehensive income 28,000 40,000 Total shareholders' equity 167,498,000 161,554,000 Total liabilities and shareholders' equity $ 169,882,000 $ 163,834,000 Statements of Income For the years ended December 31, 2015 2014 2013 Interest and dividends on investments $ 18,000 $ 15,000 $ 10,000 Net securities gains — 38,000 — Total income 18,000 53,000 10,000 Occupancy expense 12,000 12,000 11,000 Other operating expense 488,000 604,000 362,000 Total expense 500,000 616,000 373,000 Loss before income taxes and Bank earnings (482,000 ) (563,000 ) (363,000 ) Applicable income taxes (172,000 ) (200,000 ) (128,000 ) Loss before Bank earnings (310,000 ) (363,000 ) (235,000 ) Equity in earnings of Bank Remitted 10,000,000 8,850,000 7,096,000 Unremitted 6,516,000 6,222,000 6,104,000 Net income $ 16,206,000 $ 14,709,000 $ 12,965,000 Statements of Cash Flows For the years ended December 31, 2015 2014 2013 Cash flows from operating activities: Net income $ 16,206,000 $ 14,709,000 $ 12,965,000 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation 12,000 9,000 11,000 Equity compensation expense 296,000 431,000 214,000 Gain on sale of investment — (38,000 ) — Increase in other assets (135,000 ) (98,000 ) (132,000 ) (Increase) decrease in dividend receivable (50,000 ) (1,050,000 ) 400,000 Increase in other liabilities 160,000 105,000 258,000 Unremitted earnings of Bank (6,516,000 ) (6,222,000 ) (6,104,000 ) Net cash provided by operating activities 9,973,000 7,846,000 7,612,000 Cash flows from investing activities: Capital expenditures — (1,000 ) — Net cash used in investing activities — (1,000 ) — Cash flows from financing activities: Payment to repurchase preferred stock — — (12,500,000 ) Purchase of common stock (180,000 ) — — Proceeds from sale of common stock 465,000 457,000 11,973,000 Dividends paid (9,349,000 ) (8,893,000 ) (8,657,000 ) Net cash used in financing activities (9,064,000 ) (8,436,000 ) (9,184,000 ) Net increase (decrease) in cash and cash equivalents 909,000 (591,000 ) (1,572,000 ) Cash and cash equivalents at beginning of year 522,000 1,113,000 2,685,000 Cash and cash equivalents at end of year $ 1,431,000 $ 522,000 $ 1,113,000

Quarterly Information (Tables)

Quarterly Information (Tables)	12 Months Ended
	Dec. 31, 2015
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 2014Q1 2014Q2 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 Balance Sheets Cash and cash equivalents $ 13,894 $ 20,416 $ 17,167 $ 13,057 $ 13,855 $ 16,481 $ 19,169 $ 14,299 Interest-bearing deposits in other banks 2,935 272 773 3,559 336 24,565 301 4,013 Investments 488,553 502,015 472,660 461,180 418,772 463,064 461,255 463,062 Restricted equity securities 13,912 13,912 13,912 13,912 13,912 13,912 13,912 14,257 Net loans and loans held for sale 857,315 880,492 896,857 907,220 928,973 953,201 953,674 979,071 Other assets 89,508 86,973 87,268 83,203 82,984 82,117 91,361 90,108 Total assets $ 1,466,117 $ 1,504,080 $ 1,488,637 $ 1,482,131 $ 1,458,832 $ 1,553,340 $ 1,539,672 $ 1,564,810 Deposits $ 1,045,970 $ 1,033,436 $ 1,055,322 $ 1,024,819 $ 966,825 $ 1,096,323 $ 1,058,365 $ 1,043,189 Borrowed funds 253,519 298,520 258,636 279,916 312,576 278,013 297,369 337,457 Other liabilities 14,212 14,675 15,489 15,842 15,915 15,195 16,797 16,666 Shareholders' equity 152,416 157,449 159,190 161,554 163,516 163,809 167,141 167,498 Total liabilities & equity $ 1,466,117 $ 1,504,080 $ 1,488,637 $ 1,482,131 $ 1,458,832 $ 1,553,340 $ 1,539,672 $ 1,564,810 Income and Comprehensive Income Statements Interest income $ 12,623 $ 12,740 $ 12,869 $ 12,790 $ 12,365 $ 12,574 $ 12,833 $ 13,038 Interest expense 2,912 2,905 2,865 2,743 2,663 2,496 2,322 2,393 Net interest income 9,711 9,835 10,004 10,047 9,702 10,078 10,511 10,645 Provision for loan losses 400 100 350 300 500 400 200 450 Net interest income after provision for loan losses 9,311 9,735 9,654 9,747 9,202 9,678 10,311 10,195 Non-interest income 2,332 2,458 3,656 2,602 3,658 2,834 2,975 2,763 Non-interest expense 7,252 7,291 7,802 7,875 7,265 6,980 7,707 7,944 Income before taxes 4,391 4,902 5,508 4,474 5,595 5,532 5,579 5,014 Income taxes 963 1,155 1,400 1,048 1,420 1,458 1,391 1,245 Net income $ 3,428 $ 3,747 $ 4,108 $ 3,426 $ 4,175 $ 4,074 $ 4,188 $ 3,769 Basic earnings per share $ 0.32 $ 0.35 $ 0.39 $ 0.32 $ 0.39 $ 0.38 $ 0.39 $ 0.36 Diluted earnings per share $ 0.32 $ 0.35 $ 0.38 $ 0.32 $ 0.39 $ 0.38 $ 0.39 $ 0.35 Other comprehensive income (loss), net of tax Net unrealized gain (loss) on securities available for sale $ 4,824 $ 3,313 $ (319 ) $ 1,295 $ 57 $ (1,591 ) $ 1,330 $ (1,195 ) Net unrealized loss on securities transfered from available for sale to held to maturity — — (28 ) (20 ) (19 ) (17 ) (15 ) (13 ) Unrecognized loss on postretirement benefit costs — — — (313 ) — — — (31 ) Other comprehensive income (loss) $ 4,824 $ 3,313 $ (347 ) $ 962 $ 38 $ (1,608 ) $ 1,315 $ (1,239 ) Comprehensive income $ 8,252 $ 7,060 $ 3,761 $ 4,388 $ 4,213 $ 2,466 $ 5,503 $ 2,530

Summary of Significant Accoun54

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Finite lived intangible asset, amortization (in years)	10 years
Amortization of identified intangibles	$ 58	$ 326	$ 326
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	43
Yearly amortization expense until fully amortized	43
FNB Bankshares | Core Deposits
Business Acquisition [Line Items]
Amortization expense - FNB Bankshares	$ 14
Amortization of identified intangibles		$ 283	$ 283

Cash and Cash Equivalents (Deta

Cash and Cash Equivalents (Details) $ in Thousands	Dec. 31, 2015USD ($)
Cash and Cash Equivalents [Abstract]
Contractual clearing balance	$ 500
Cash held in Reserve at Federal Reserve Bank	$ 1,956

Investment Securities (Details)

Investment Securities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)securitystate	Dec. 31, 2014USD ($)security	Dec. 31, 2013USD ($)	Sep. 30, 2014USD ($)	Dec. 31, 2012USD ($)
Securities available for sale
Amortized Cost-Equity	$ 3,381	$ 2,490
Amortized Cost-Total	221,311	181,380
Unrealized Gains	2,758	4,567
Unrealized Losses	(1,030)	(686)
Fair Value Estimated	223,039	185,261
Proceeds from sales of securities	35,468	15,557	$ 10,563
Gross realized gains	1,399	1,155	1,087
Gross realized losses	0	0	0
Net gain	1,399	1,155	1,087
Related income taxes	490	404	380
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	168,818	17,298
12 months or more, Fair Value	21,048	111,694
Total, Fair Value	189,866	128,992
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	(2,525)	(74)
12 months or more, Unrealized Losses	(950)	(2,825)
Total, Unrealized Losses	(3,475)	(2,899)
Amortized cost of securities transferred				$ 89,780
Fair value of securities transferred				89,757
Unrealized loss on securities transferred				$ 15
Net unrealized loss on securities transferred from available for sale to held to maturity	$ 112	48	$ 0		$ 0
Number of states | state	6
FHLB stock	$ 13,220	12,875
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	240,023	275,919
Unrealized Gains	5,545	5,998
Unrealized Losses	(2,445)	(2,213)
Fair Value Estimated	243,123	279,704
Restricted equity securities, cost and FMV [Abstract]
Amortized Cost	14,257	13,912
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value Estimated	14,257	13,912
Securities available for sale, maturities amortized cost [Abstract]
Amortized cost, debt maturities, due in 1 year or less	527	2,309
Amortized cost, debt maturities, due in 1 to 5 years	7,562	15,200
Amortized cost, debt maturities, due in 5 to 10 years	19,647	18,547
Amortized cost, debt maturities, due after 10 years	190,194	142,834
Amortized cost, equity maturities	3,381	2,490
Amortized Cost-Total	221,311	181,380
Securities available for sale, maturities fair value estimated [Abstract]
Fair value, debt maturities, due in 1 year or less	530	2,329
Fair value, debt maturities, due in 1 to 5 years	7,727	15,499
Fair value, debt maturities, due in 5 to 10 years	20,055	19,124
Fair value, debt maturities, due after 10 years	191,304	145,758
Fair value, equity maturities	3,423	2,551
Fair Value Estimated	223,039	185,261
Securities to be held to maturity, maturities, amortized cost [Abstract]
Amortized cost, due in 1 year or less	1,814	1,693
Amortized cost, due in 1 to 5 years	6,306	8,467
Amortized cost, due in 5 to 10 years	58,397	50,629
Amortized cost, due after 10 years	173,506	215,130
Securities to be held to maturity (fair value of $243,123,000 at December 31, 2015, and $279,704,000 at December 31, 2014)	240,023	275,919
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Fair value, due in 1 year or less	1,850	1,713
Fair value, due in 1 to 5 years	6,514	8,702
Fair value, due in 5 to 10 years	60,196	52,717
Fair value, due after 10 years	174,563	216,572
Securities to be held to maturity, fair value	243,123	279,704
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	$ 201,879	$ 164,919
Number of securities temporarily impaired as a result of changes in interest rates reducing their fair value (in number of securities) | security	78	56
Number of securities temporarily impaired for 12 months or more (in number of securities) | security	15	36
Length of time for the temporary impairment (in months)	12 months	12 months
Federal Home Loan Bank Stock
Restricted equity securities, cost and FMV [Abstract]
Amortized Cost	$ 13,220	$ 12,875
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value Estimated	13,220	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
U.S. Government-sponsored agencies
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	45,311	0
12 months or more, Fair Value	17,185	79,444
Total, Fair Value	62,496	79,444
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	(1,469)	0
12 months or more, Unrealized Losses	(815)	(2,066)
Total, Unrealized Losses	(2,284)	(2,066)
Mortgage-backed securities
Securities available for sale
Amortized Cost-Debt	194,563	149,796
Unrealized Gains	1,509	2,637
Unrealized Losses	(962)	(578)
Fair Value Estimated	195,110	151,855
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	120,915	13,878
12 months or more, Fair Value	910	29,182
Total, Fair Value	121,825	43,060
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	(1,027)	(40)
12 months or more, Unrealized Losses	(71)	(654)
Total, Unrealized Losses	(1,098)	(694)
Securities available for sale, maturities fair value estimated [Abstract]
Fair Value Estimated	195,110	151,855
State and political subdivisions
Securities available for sale
Amortized Cost-Debt	23,367	29,094
Unrealized Gains	1,201	1,865
Unrealized Losses	(62)	(104)
Fair Value Estimated	24,506	30,855
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	2,528	3,352
12 months or more, Fair Value	2,901	3,017
Total, Fair Value	5,429	6,369
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	(24)	(31)
12 months or more, Unrealized Losses	(63)	(104)
Total, Unrealized Losses	(87)	(135)
Securities available for sale, maturities fair value estimated [Abstract]
Fair Value Estimated	24,506	30,855
Other equity securities
Securities available for sale
Amortized Cost-Equity	3,381	2,490
Unrealized Gains	48	65
Unrealized Losses	(6)	(4)
Fair Value Estimated	3,423	2,551
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	64	68
12 months or more, Fair Value	52	51
Total, Fair Value	116	119
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Less than 12 months, Unrealized Losses	(5)	(3)
12 months or more, Unrealized Losses	(1)	(1)
Total, Unrealized Losses	(6)	(4)
Securities available for sale, maturities amortized cost [Abstract]
Amortized cost, equity maturities	3,381	2,490
Securities available for sale, maturities fair value estimated [Abstract]
Fair Value Estimated	3,423	2,551
U.S. Government-sponsored agencies
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	71,000	92,341
Unrealized Gains	40	54
Unrealized Losses	(2,284)	(2,066)
Fair Value Estimated	68,756	90,329
Securities to be held to maturity, maturities, amortized cost [Abstract]
Securities to be held to maturity (fair value of $243,123,000 at December 31, 2015, and $279,704,000 at December 31, 2014)	71,000	92,341
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Securities to be held to maturity, fair value	68,756	90,329
Mortgage-backed securities
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	42,193	57,003
Unrealized Gains	1,305	1,830
Unrealized Losses	(136)	(116)
Fair Value Estimated	43,362	58,717
Securities to be held to maturity, maturities, amortized cost [Abstract]
Securities to be held to maturity (fair value of $243,123,000 at December 31, 2015, and $279,704,000 at December 31, 2014)	42,193	57,003
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Securities to be held to maturity, fair value	43,362	58,717
State and political subdivisions
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	122,530	126,275
Unrealized Gains	4,200	4,114
Unrealized Losses	(25)	(31)
Fair Value Estimated	126,705	130,358
Securities to be held to maturity, maturities, amortized cost [Abstract]
Securities to be held to maturity (fair value of $243,123,000 at December 31, 2015, and $279,704,000 at December 31, 2014)	122,530	126,275
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Securities to be held to maturity, fair value	126,705	130,358
Corporate securities
Securities to be held to maturity, cost and FMV [Abstract]
Amortized Cost	4,300	300
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value Estimated	4,300	300
Securities to be held to maturity, maturities, amortized cost [Abstract]
Securities to be held to maturity (fair value of $243,123,000 at December 31, 2015, and $279,704,000 at December 31, 2014)	4,300	300
Securities to be held to maturity, Debt Maturities, Fair Value [Abstract]
Securities to be held to maturity, fair value	$ 4,300	$ 300

Mortgage Servicing Rights (Deta

Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Transfers and Servicing [Abstract]
Outstanding principal balance of loans serviced for others	$ 223,610	$ 214,086
Net gain from sale of loans	714	496	$ 1,224
Mortgage servicing rights capitalized	487	345
Amortization of mortgage servicing rights	449	428
Fair value of mortgage servicing rights	$ 1,915	2,088
Moving average of weekly prepayment data (in months)	3 months
Anticipated loan prepayment rate of servicing assets (in hundredths)	9.76%
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)	5.28%
Summary of mortgage servicing rights [Abstract]
Mortgage servicing rights	$ 5,747	6,039
Accumulated amortization	(4,619)	(4,949)
Impairment reserve	(35)	(4)
Mortgage servicing rights, net	$ 1,093	$ 1,086

Loans (Details)

Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)loan	Dec. 31, 2014USD ($)loan	Dec. 31, 2013USD ($)
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	$ 988,638	$ 917,564	$ 876,367
Percentage of loan portfolio (in hundredths)	100.00%	100.00%
Loans Receivable to Related Party [Roll Forward]
Balance at beginning of year	$ 14,856	$ 14,884
New loans	7,382	8,932
Repayments	(1,837)	(8,960)
Balance at end of year	20,401	14,856	14,884
Loans, aging disclosure [Abstract]
All Past Due	8,287	11,863
Current	980,351	905,701
Amount of loan portfolio	988,638	917,564	876,367
90 Plus Days And Accruing	136	181
Nonaccrual Loans [Abstract]
Nonaccrual loans	7,372	10,510
Average investment in impaired loans	32,698	38,404	45,722
Interest income recognized on impaired loans, all on cash basis	1,218	1,465	1,750
Balance of impaired loans	29,531	35,862	42,351
Less portion for which no allowance for loan losses is allocated	(20,889)	(26,313)
Portion of impaired loan balance for which an allowance for loan losses is allocated	8,642	9,549
Portion of allowance for loan losses allocated to the impaired loan balance	754	1,803	2,461
Recorded Investment	29,531	35,862	42,351
Unpaid Principal Balance	31,906	39,026	46,408
Average Recorded Investment	32,698	38,404	45,722
Recognized Interest Income	$ 1,218	$ 1,465	1,750
Troubled Debt Restructured, Number of Loans | loan	84	94
Troubled Debt Restructured, Balance	$ 23,923	$ 27,214
Troubled Debt Restructured, Specific Reserves	$ 455	$ 868
Troubled Debt Restructured (Greater than 30 days), Number of Loans | loan	8	12
Financing Receivable Recorded Investment Greater Than30 Days Past Due	$ 1,053	$ 1,549
Troubled Debt Restructured (Greater than 30 days), Balance	1,053	1,549
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	$ 46	$ 177
Financing Receivable, Number of Loans | loan	2	6
Financing Receivable Modifications Pre Modification Recorded Investment During Period	$ 218	$ 826
Financing Receivable, Pre-Modification Outstanding Recorded Investment	221	929
Financing Receivable, Post-Modification Outstanding Recorded Investment	218	826
Financing Receivable, Specific Reserves	0	12
Net deferred loan costs included in loan balances	3,686	2,729
Loans used to collateralize borrowings from the Federal Home Loan Bank of Boston	279,463	266,716
Commercial, construction and home equity loans used to collateralize unused line of credit at the Federal Reserve Bank of Boston	243,578	240,943
Interest income which would have been recognized on these loans, if interest had been accrued	369	551	917
Loans to directors, officers and employees	$ 31,285	$ 29,883
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loan	0	2
Financing Receivable, Loans Classified as Troubled Debt Restructurings That Had Been Placed on TDR Status in Previous 12 Months		$ 238
Loans classified as TDRs that are involved in bankruptcy	$ 1,079
Number of loans classified as TDRs that were on non-accrual status | loan	13
Loans classified as TDRs that were on non-accrual status	$ 1,764
Number of loans classified as TDRs that are involved in foreclosure | loan	3
Loans classified as TDRs that are involved in foreclosure	$ 262
Number of mortgage loans in the process of foreclosure | loan	16
Mortgage loans in the process of foreclosure	$ 1,513
Loans Receivable in Bankruptcy
Nonaccrual Loans [Abstract]
Financing Receivable, Number of Loans | loan	6
30-59 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	$ 2,122	2,142
60-89 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	2,379	1,356
90 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	3,786	8,365
With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	22,808	26,926	31,541
Balance of impaired loans	20,889	26,313	32,417
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	20,889	26,313	32,417
Unpaid Principal Balance	22,947	29,077	36,119
Average Recorded Investment	22,808	26,926	31,541
Recognized Interest Income	839	1,078	1,360
With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	9,890	11,478	14,181
Balance of impaired loans	8,642	9,549	9,934
Portion of allowance for loan losses allocated to the impaired loan balance	754	1,803	2,461
Recorded Investment	8,642	9,549	9,934
Unpaid Principal Balance	8,959	9,949	10,289
Average Recorded Investment	9,890	11,478	14,181
Recognized Interest Income	381	387	390
Commercial Real Estate
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	$ 269,462	$ 242,311
Percentage of loan portfolio (in hundredths)	27.30%	26.40%
Loans, aging disclosure [Abstract]
All Past Due	$ 884	$ 860
Current	268,578	241,451
Amount of loan portfolio	269,462	242,311
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual loans	915	2,088
Average investment in impaired loans	12,056	14,120	16,773
Balance of impaired loans	10,717	13,304	14,935
Portion of allowance for loan losses allocated to the impaired loan balance	89	346	890
Recorded Investment	10,717	13,304	14,935
Unpaid Principal Balance	11,123	14,212	15,683
Average Recorded Investment	12,056	14,120	16,773
Recognized Interest Income	$ 450	$ 550	645
Troubled Debt Restructured, Number of Loans | loan	15	19
Troubled Debt Restructured, Balance	$ 10,350	$ 12,282
Troubled Debt Restructured, Specific Reserves	$ 85	$ 267
Troubled Debt Restructured (Greater than 30 days), Number of Loans | loan	0	1
Troubled Debt Restructured (Greater than 30 days), Balance	$ 0	$ 321
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	$ 0	$ 120
Financing Receivable, Number of Loans | loan	0	2
Financing Receivable, Pre-Modification Outstanding Recorded Investment	$ 0	$ 302
Financing Receivable, Post-Modification Outstanding Recorded Investment	0	300
Financing Receivable, Specific Reserves	0	0
Commercial Real Estate | 30-59 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	603	24
Commercial Real Estate | 60-89 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	0	75
Commercial Real Estate | 90 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	281	761
Commercial Real Estate | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	8,990	11,080	11,100
Balance of impaired loans	7,173	11,687	11,813
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	7,173	11,687	11,813
Unpaid Principal Balance	7,496	12,423	12,419
Average Recorded Investment	8,990	11,080	11,100
Recognized Interest Income	301	488	495
Commercial Real Estate | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	3,066	3,040	5,673
Balance of impaired loans	3,544	1,617	3,122
Portion of allowance for loan losses allocated to the impaired loan balance	89	346	890
Recorded Investment	3,544	1,617	3,122
Unpaid Principal Balance	3,627	1,789	3,264
Average Recorded Investment	3,066	3,040	5,673
Recognized Interest Income	149	62	150
Commercial Construction
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	$ 24,881	$ 30,932
Percentage of loan portfolio (in hundredths)	2.50%	3.40%
Loans, aging disclosure [Abstract]
All Past Due	$ 273	$ 249
Current	24,608	30,683
Amount of loan portfolio	24,881	30,932
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual loans	238	208
Average investment in impaired loans	1,156	1,309	1,997
Balance of impaired loans	1,026	1,380	1,284
Portion of allowance for loan losses allocated to the impaired loan balance	302	413	272
Recorded Investment	1,026	1,380	1,284
Unpaid Principal Balance	1,026	1,380	1,284
Average Recorded Investment	1,156	1,309	1,997
Recognized Interest Income	$ 45	$ 56	48
Troubled Debt Restructured, Number of Loans | loan	1	1
Troubled Debt Restructured, Balance	$ 788	$ 1,172
Troubled Debt Restructured, Specific Reserves	$ 94	$ 207
Troubled Debt Restructured (Greater than 30 days), Number of Loans | loan	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 | loan	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 | 30-59 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	35	0
Commercial Construction | 60-89 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	0	41
Commercial Construction | 90 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	238	208
Commercial Construction | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	3	30	202
Balance of impaired loans	30	0	0
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	30	0	0
Unpaid Principal Balance	30	0	0
Average Recorded Investment	3	30	202
Recognized Interest Income	1	0	0
Commercial Construction | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	1,153	1,279	1,795
Balance of impaired loans	996	1,380	1,284
Portion of allowance for loan losses allocated to the impaired loan balance	302	413	272
Recorded Investment	996	1,380	1,284
Unpaid Principal Balance	996	1,380	1,284
Average Recorded Investment	1,153	1,279	1,795
Recognized Interest Income	44	56	48
Commercial Other
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	$ 128,341	$ 104,531	95,289
Percentage of loan portfolio (in hundredths)	13.00%	11.40%
Loans, aging disclosure [Abstract]
All Past Due	$ 328	$ 860
Current	128,013	103,671
Amount of loan portfolio	128,341	104,531	95,289
90 Plus Days And Accruing	25	0
Nonaccrual Loans [Abstract]
Nonaccrual loans	66	935
Average investment in impaired loans	2,149	4,956	5,898
Balance of impaired loans	1,234	2,942	6,698
Portion of allowance for loan losses allocated to the impaired loan balance	8	129	841
Recorded Investment	1,234	2,942	6,698
Unpaid Principal Balance	1,287	3,745	8,441
Average Recorded Investment	2,149	4,956	5,898
Recognized Interest Income	$ 80	$ 169	350
Troubled Debt Restructured, Number of Loans | loan	11	15
Troubled Debt Restructured, Balance	$ 1,168	$ 2,007
Troubled Debt Restructured, Specific Reserves	$ 1	$ 0
Troubled Debt Restructured (Greater than 30 days), Number of Loans | loan	0	1
Troubled Debt Restructured (Greater than 30 days), Balance	$ 0	$ 2
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	$ 0	$ 0
Financing Receivable, Number of Loans | loan	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 Other | 30-59 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	303	3
Commercial Other | 60-89 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	0	0
Commercial Other | 90 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	25	857
Commercial Other | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	1,893	3,853	4,265
Balance of impaired loans	1,163	2,616	5,617
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	1,163	2,616	5,617
Unpaid Principal Balance	1,210	3,407	7,309
Average Recorded Investment	1,893	3,853	4,265
Recognized Interest Income	76	156	322
Commercial Other | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	256	1,103	1,633
Balance of impaired loans	71	326	1,081
Portion of allowance for loan losses allocated to the impaired loan balance	8	129	841
Recorded Investment	71	326	1,081
Unpaid Principal Balance	77	338	1,132
Average Recorded Investment	256	1,103	1,633
Recognized Interest Income	5	13	28
Municipal
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	$ 19,751	$ 20,424	19,117
Percentage of loan portfolio (in hundredths)	2.00%	2.20%
Loans, aging disclosure [Abstract]
All Past Due	$ 0	$ 0
Current	19,751	20,424
Amount of loan portfolio	19,751	20,424	19,117
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual loans	0	0
Average investment in impaired loans	0	0	0
Balance of impaired loans	0	0	0
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Average Recorded Investment	0	0	0
Recognized Interest Income	$ 0	$ 0	0
Troubled Debt Restructured, Number of Loans | loan	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 | loan	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 | loan	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 | 30-59 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	0	0
Municipal | 60-89 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	0	0
Municipal | 90 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	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
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Average Recorded Investment	0	0	0
Recognized Interest Income	0	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
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	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	$ 403,030	$ 384,032	377,218
Percentage of loan portfolio (in hundredths)	40.70%	41.90%
Loans, aging disclosure [Abstract]
All Past Due	$ 5,187	$ 7,003
Current	397,843	377,029
Amount of loan portfolio	403,030	384,032	377,218
90 Plus Days And Accruing	100	101
Nonaccrual Loans [Abstract]
Nonaccrual loans	5,260	6,421
Average investment in impaired loans	15,708	16,243	19,378
Balance of impaired loans	15,088	16,123	17,786
Portion of allowance for loan losses allocated to the impaired loan balance	326	519	404
Recorded Investment	15,088	16,123	17,786
Unpaid Principal Balance	16,350	17,337	19,116
Average Recorded Investment	15,708	16,243	19,378
Recognized Interest Income	$ 595	$ 641	673
Troubled Debt Restructured, Number of Loans | loan	53	54
Troubled Debt Restructured, Balance	$ 10,875	$ 10,932
Troubled Debt Restructured, Specific Reserves	$ 275	$ 373
Troubled Debt Restructured (Greater than 30 days), Number of Loans | loan	8	8
Troubled Debt Restructured (Greater than 30 days), Balance	$ 1,053	$ 1,000
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	$ 46	$ 36
Financing Receivable, Number of Loans | loan	2	4
Financing Receivable, Pre-Modification Outstanding Recorded Investment	$ 221	$ 627
Financing Receivable, Post-Modification Outstanding Recorded Investment	218	526
Financing Receivable, Specific Reserves	0	12
Residential Term | 30-59 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	450	856
Residential Term | 60-89 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	2,098	468
Residential Term | 90 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	2,639	5,679
Residential Term | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	10,480	10,505	14,396
Balance of impaired loans	11,122	10,820	13,432
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	11,122	10,820	13,432
Unpaid Principal Balance	12,157	11,824	14,600
Average Recorded Investment	10,480	10,505	14,396
Recognized Interest Income	415	402	511
Residential Term | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	5,228	5,738	4,982
Balance of impaired loans	3,966	5,303	4,354
Portion of allowance for loan losses allocated to the impaired loan balance	326	519	404
Recorded Investment	3,966	5,303	4,354
Unpaid Principal Balance	4,193	5,513	4,516
Average Recorded Investment	5,228	5,738	4,982
Recognized Interest Income	180	239	162
Residential Construction
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	$ 8,451	$ 12,160	11,803
Percentage of loan portfolio (in hundredths)	0.90%	1.30%
Loans, aging disclosure [Abstract]
All Past Due	$ 368	$ 0
Current	8,083	12,160
Amount of loan portfolio	8,451	12,160	11,803
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual loans	0	0
Average investment in impaired loans	0	0	0
Balance of impaired loans	0	0	0
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Average Recorded Investment	0	0	0
Recognized Interest Income	$ 0	$ 0	0
Troubled Debt Restructured, Number of Loans | loan	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 | loan	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 | loan	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 | 30-59 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	368	0
Residential Construction | 60-89 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	0	0
Residential Construction | 90 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	0	0
Residential Construction | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	0	0	0
Balance of impaired loans	0	0	0
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Average Recorded Investment	0	0	0
Recognized Interest Income	0	0	0
Residential Construction | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	0	0	0
Balance of impaired loans	0	0	0
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Average Recorded Investment	0	0	0
Recognized Interest Income	0	0	0
Home equity line of credit
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	$ 110,202	$ 103,521	91,549
Percentage of loan portfolio (in hundredths)	11.10%	11.30%
Loans, aging disclosure [Abstract]
All Past Due	$ 1,108	$ 2,122
Current	109,094	101,399
Amount of loan portfolio	110,202	103,521	91,549
90 Plus Days And Accruing	0	0
Nonaccrual Loans [Abstract]
Nonaccrual loans	893	832
Average investment in impaired loans	1,587	1,765	1,676
Balance of impaired loans	1,466	2,087	1,648
Portion of allowance for loan losses allocated to the impaired loan balance	29	396	54
Recorded Investment	1,466	2,087	1,648
Unpaid Principal Balance	2,120	2,324	1,884
Average Recorded Investment	1,587	1,765	1,676
Recognized Interest Income	$ 45	$ 46	34
Troubled Debt Restructured, Number of Loans | loan	4	5
Troubled Debt Restructured, Balance	$ 742	$ 821
Troubled Debt Restructured, Specific Reserves	$ 0	$ 21
Troubled Debt Restructured (Greater than 30 days), Number of Loans | loan	0	2
Troubled Debt Restructured (Greater than 30 days), Balance	$ 0	$ 226
Troubled Debt Restructured (Greater than 30 days), Specific Reserves	$ 0	$ 21
Financing Receivable, Number of Loans | loan	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
Home equity line of credit | 30-59 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	261	622
Home equity line of credit | 60-89 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	255	720
Home equity line of credit | 90 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	592	780
Home equity line of credit | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	1,400	1,447	1,578
Balance of impaired loans	1,401	1,164	1,555
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	1,401	1,164	1,555
Unpaid Principal Balance	2,054	1,395	1,791
Average Recorded Investment	1,400	1,447	1,578
Recognized Interest Income	43	29	32
Home equity line of credit | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	187	318	98
Balance of impaired loans	65	923	93
Portion of allowance for loan losses allocated to the impaired loan balance	29	396	54
Recorded Investment	65	923	93
Unpaid Principal Balance	66	929	93
Average Recorded Investment	187	318	98
Recognized Interest Income	3	17	2
Consumer
Composition of Loan Portfolio [Abstract]
Amount of loan portfolio	$ 24,520	$ 19,653
Percentage of loan portfolio (in hundredths)	2.50%	2.10%
Loans, aging disclosure [Abstract]
All Past Due	$ 139	$ 769
Current	24,381	18,884
Amount of loan portfolio	24,520	19,653
90 Plus Days And Accruing	11	80
Nonaccrual Loans [Abstract]
Nonaccrual loans	0	26
Average investment in impaired loans	42	11	0
Balance of impaired loans	0	26	0
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	0	26	0
Unpaid Principal Balance	0	28	0
Average Recorded Investment	42	11	0
Recognized Interest Income	$ 3	$ 3	0
Troubled Debt Restructured, Number of Loans | loan	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 | loan	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 | loan	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
Consumer | 30-59 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	102	637
Consumer | 60-89 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	26	52
Consumer | 90 Days Past Due
Loans, aging disclosure [Abstract]
All Past Due	11	80
Consumer | With No Related Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	42	11	0
Balance of impaired loans	0	26	0
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	0	26	0
Unpaid Principal Balance	0	28	0
Average Recorded Investment	42	11	0
Recognized Interest Income	3	3	0
Consumer | With an Allowance Recorded
Nonaccrual Loans [Abstract]
Average investment in impaired loans	0	0	0
Balance of impaired loans	0	0	0
Portion of allowance for loan losses allocated to the impaired loan balance	0	0	0
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Average Recorded Investment	0	0	0
Recognized Interest Income	$ 0	$ 0	$ 0

Allowance for Loan Losses (Deta

Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment												$ 754	$ 1,803	$ 2,461
Allowance for Loans Evaluated Collectively for Impairment												9,162	8,541	9,053
Total Allowance for Loan Losses	$ 9,916			$ 10,344	$ 10,344			$ 11,514	$ 10,344	$ 11,514	$ 12,500	9,916	10,344	11,514
Total Allowance for Loan Losses	9,916			10,344	10,344			11,514	10,344	11,514	12,500	9,916	10,344	11,514
Commercial and municipal risk-rated loans receivable												442,435	398,198
Allowance for loan losses
Beginning balance				10,344				11,514	10,344	11,514	12,500
Chargeoffs									2,373	3,495	5,855
Recoveries									395	1,175	669
Provision (credit)	450	$ 200	$ 400	500	300	$ 350	$ 100	400	1,550	1,150	4,200
Ending balance	9,916				10,344				$ 9,916	$ 10,344	11,514
Ending balance specifically evaluated for impairment												754	1,803	2,461
Ending balance collectively evaluated for impairment												9,162	8,541	9,053
Related loan balances
Ending balance												988,638	917,564	876,367
Ending balance specifically evaluated for impairment												29,531	35,862	42,351
Ending balance collectively evaluated for impairment												959,107	881,702	834,016
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Qualitative portion of allowance for loan losses, as a percent of related loans									0.45%	0.39%
Increase in qualitative portion									$ 834
Total Allowance for Loan Losses	9,916			10,344	10,344			11,514	$ 10,344	$ 11,514	12,500	$ 9,916	$ 10,344	11,514
Allowance for loan losses as a percent of total loans												1.00%	1.13%
Commercial real estate loans maximum loan-to-value (in hundredths)												80.00%
Construction loans actual loan portfolio-to-Company capital (in hundredths)												23.10%
Construction loans maximum loan portfolio-to-Company capital (in hundredths)												100.00%
Construction and non-owner-occupied commercial real estate loan portfolio-to-Company Capital (in hundredths)												104.20%
Construction and non-owner-occupied commercial real estate loan portfolio loan-to-Company capital (in hundredths)												300.00%
Outstanding loans and commitments subject by independent consulting firm												50.00%
Residential loans typical loan-to-value range, low (in hundredths)												75.00%
Residential loans typical loan-to-value maximum (in hundredths)												80.00%
Collateralized consumer loans to individuals loan-to-value maximum range, low (in hundredths)												80.00%
Collateralized consumer loans to individuals loan-to-value maximum range, high (in hundredths)												90.00%
Delinquent period before consumer loans charged off (in days)									120 days
Delinquent period before residential loans placed on non-accrual status (in days)									90 days
1 Strong
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												$ 1,262	$ 342
2 Above average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												55,059	39,438
3 Satisfactory
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												85,095	78,125
4 Average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												207,442	176,959
5 Watch
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												58,700	56,712
6 OAEM
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												12,152	14,335
7 Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												22,725	32,287
8 Doubtful
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	754			1,803	1,803				$ 1,803	1,803		754	1,803
Total Allowance for Loan Losses	754			1,803	1,803				1,803	1,803		754	1,803
Allowance for loan losses
Beginning balance				1,803					1,803
Ending balance	754				1,803				754	1,803
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	754			1,803	1,803				1,803	1,803		754	1,803
General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	2,858			3,282	3,282				3,282	3,282		2,858	3,282
Total Allowance for Loan Losses	2,858			3,282	3,282				3,282	3,282		2,858	3,282
Allowance for loan losses
Beginning balance				3,282					3,282
Ending balance	2,858				3,282				2,858	3,282
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	2,858			3,282	3,282				3,282	3,282		2,858	3,282
Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	4,431			3,597	3,597				3,597	3,597		4,431	3,597
Total Allowance for Loan Losses	4,431			3,597	3,597				3,597	3,597		4,431	3,597
Allowance for loan losses
Beginning balance				3,597					3,597
Ending balance	4,431				3,597				4,431	3,597
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	4,431			3,597	3,597				3,597	3,597		4,431	3,597
Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	1,873			1,662	1,662				1,662	1,662		1,873	1,662
Total Allowance for Loan Losses	1,873			1,662	1,662				1,662	1,662		1,873	1,662
Allowance for loan losses
Beginning balance				1,662					1,662
Ending balance	1,873				1,662				1,873	1,662
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,873			1,662	1,662				1,662	1,662		$ 1,873	$ 1,662
Percent of total reserve												18.90%	16.10%
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment												$ 89	$ 346	890
Allowance for Loans Evaluated Collectively for Impairment												3,031	3,186	3,712
Total Allowance for Loan Losses	3,120			3,532	3,532			4,602	3,532	4,602	5,865	3,120	3,532	4,602
Total Allowance for Loan Losses	3,120			3,532	3,532			4,602	3,532	4,602	5,865	3,120	3,532	4,602
Commercial and municipal risk-rated loans receivable												269,462	242,311
Allowance for loan losses
Beginning balance				3,532				4,602	3,532	4,602	5,865
Chargeoffs									280	1,205	150
Recoveries									2	144	0
Provision (credit)									(134)	(9)	(1,113)
Ending balance	3,120				3,532				3,120	3,532	4,602
Ending balance specifically evaluated for impairment												89	346	890
Ending balance collectively evaluated for impairment												3,031	3,186	3,712
Related loan balances
Ending balance												269,462	242,311	245,943
Ending balance specifically evaluated for impairment												10,717	13,304	14,935
Ending balance collectively evaluated for impairment												258,745	229,007	231,008
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	3,120			3,532	3,532			4,602	3,532	4,602	5,865	3,120	3,532	4,602
Commercial Real Estate | 1 Strong
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												6	12
Commercial Real Estate | 2 Above average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												29,176	12,668
Commercial Real Estate | 3 Satisfactory
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												52,821	50,275
Commercial Real Estate | 4 Average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												122,071	108,719
Commercial Real Estate | 5 Watch
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												36,075	36,974
Commercial Real Estate | 6 OAEM
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												9,742	9,846
Commercial Real Estate | 7 Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												19,571	23,817
Commercial Real Estate | 8 Doubtful
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Commercial Real Estate | Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	89			346	346				346	346		89	346
Total Allowance for Loan Losses	89			346	346				346	346		89	346
Allowance for loan losses
Beginning balance				346					346
Ending balance	89				346				89	346
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	89			346	346				346	346		89	346
Commercial Real Estate | General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	893			1,444	1,444				1,444	1,444		893	1,444
Total Allowance for Loan Losses	893			1,444	1,444				1,444	1,444		893	1,444
Allowance for loan losses
Beginning balance				1,444					1,444
Ending balance	893				1,444				893	1,444
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	893			1,444	1,444				1,444	1,444		893	1,444
Commercial Real Estate | Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	2,138			1,742	1,742				1,742	1,742		2,138	1,742
Total Allowance for Loan Losses	2,138			1,742	1,742				1,742	1,742		2,138	1,742
Allowance for loan losses
Beginning balance				1,742					1,742
Ending balance	2,138				1,742				2,138	1,742
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	2,138			1,742	1,742				1,742	1,742		2,138	1,742
Commercial Real Estate | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Commercial Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment												302	413	272
Allowance for Loans Evaluated Collectively for Impairment												278	410	303
Total Allowance for Loan Losses	580			823	823			575	823	575	1,359	580	823	575
Total Allowance for Loan Losses	580			823	823			575	823	575	1,359	580	823	575
Commercial and municipal risk-rated loans receivable												24,881	30,932
Allowance for loan losses
Beginning balance				823				575	823	575	1,359
Chargeoffs									9	0	963
Recoveries									1	0	0
Provision (credit)									(235)	248	179
Ending balance	580				823				580	823	575
Ending balance specifically evaluated for impairment												302	413	272
Ending balance collectively evaluated for impairment												278	410	303
Related loan balances
Ending balance												24,881	30,932	20,382
Ending balance specifically evaluated for impairment												1,026	1,380	1,284
Ending balance collectively evaluated for impairment												23,855	29,552	19,098
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	580			823	823			575	823	575	1,359	580	823	575
Commercial Construction | 1 Strong
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Commercial Construction | 2 Above average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												56	771
Commercial Construction | 3 Satisfactory
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												2,057	1,983
Commercial Construction | 4 Average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												18,070	23,345
Commercial Construction | 5 Watch
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												4,490	1,567
Commercial Construction | 6 OAEM
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	2,519
Commercial Construction | 7 Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												208	747
Commercial Construction | 8 Doubtful
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Commercial Construction | Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	302			413	413				413	413		302	413
Total Allowance for Loan Losses	302			413	413				413	413		302	413
Allowance for loan losses
Beginning balance				413					413
Ending balance	302				413				302	413
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	302			413	413				413	413		302	413
Commercial Construction | General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	82			186	186				186	186		82	186
Total Allowance for Loan Losses	82			186	186				186	186		82	186
Allowance for loan losses
Beginning balance				186					186
Ending balance	82				186				82	186
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	82			186	186				186	186		82	186
Commercial Construction | Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	196			224	224				224	224		196	224
Total Allowance for Loan Losses	196			224	224				224	224		196	224
Allowance for loan losses
Beginning balance				224					224
Ending balance	196				224				196	224
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	196			224	224				224	224		196	224
Commercial Construction | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Commercial Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment												8	129	841
Allowance for Loans Evaluated Collectively for Impairment												1,444	1,376	1,435
Total Allowance for Loan Losses	1,452			1,505	1,505			2,276	1,505	2,276	2,050	1,452	1,505	2,276
Total Allowance for Loan Losses	1,452			1,505	1,505			2,276	1,505	2,276	2,050	1,452	1,505	2,276
Commercial and municipal risk-rated loans receivable												128,341	104,531
Allowance for loan losses
Beginning balance				1,505				2,276	1,505	2,276	2,050
Chargeoffs									732	989	2,583
Recoveries									88	758	359
Provision (credit)									591	(540)	2,450
Ending balance	1,452				1,505				1,452	1,505	2,276
Ending balance specifically evaluated for impairment												8	129	841
Ending balance collectively evaluated for impairment												1,444	1,376	1,435
Related loan balances
Ending balance												128,341	104,531	95,289
Ending balance specifically evaluated for impairment												1,234	2,942	6,698
Ending balance collectively evaluated for impairment												127,107	101,589	88,591
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,452			1,505	1,505			2,276	1,505	2,276	2,050	1,452	1,505	2,276
Commercial Other | 1 Strong
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												1,256	330
Commercial Other | 2 Above average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												7,506	7,210
Commercial Other | 3 Satisfactory
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												28,787	24,232
Commercial Other | 4 Average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												67,301	44,895
Commercial Other | 5 Watch
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												18,135	18,171
Commercial Other | 6 OAEM
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												2,410	1,970
Commercial Other | 7 Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												2,946	7,723
Commercial Other | 8 Doubtful
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Commercial Other | Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	8			129	129				129	129		8	129
Total Allowance for Loan Losses	8			129	129				129	129		8	129
Allowance for loan losses
Beginning balance				129					129
Ending balance	8				129				8	129
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	8			129	129				129	129		8	129
Commercial Other | General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	425			624	624				624	624		425	624
Total Allowance for Loan Losses	425			624	624				624	624		425	624
Allowance for loan losses
Beginning balance				624					624
Ending balance	425				624				425	624
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	425			624	624				624	624		425	624
Commercial Other | Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	1,019			752	752				752	752		1,019	752
Total Allowance for Loan Losses	1,019			752	752				752	752		1,019	752
Allowance for loan losses
Beginning balance				752					752
Ending balance	1,019				752				1,019	752
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,019			752	752				752	752		1,019	752
Commercial Other | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Municipal
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment												0	0	0
Allowance for Loans Evaluated Collectively for Impairment												17	15	15
Total Allowance for Loan Losses	17			15	15			15	15	15	18	17	15	15
Total Allowance for Loan Losses	17			15	15			15	15	15	18	17	15	15
Commercial and municipal risk-rated loans receivable												19,751	20,424
Allowance for loan losses
Beginning balance				15				15	15	15	18
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit)									2	0	(3)
Ending balance	17				15				17	15	15
Ending balance specifically evaluated for impairment												0	0	0
Ending balance collectively evaluated for impairment												17	15	15
Related loan balances
Ending balance												19,751	20,424	19,117
Ending balance specifically evaluated for impairment												0	0	0
Ending balance collectively evaluated for impairment												19,751	20,424	19,117
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	17			15	15			15	15	15	18	17	15	15
Municipal | 1 Strong
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Municipal | 2 Above average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												18,321	18,789
Municipal | 3 Satisfactory
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												1,430	1,635
Municipal | 4 Average
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Municipal | 5 Watch
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Municipal | 6 OAEM
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Municipal | 7 Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Municipal | 8 Doubtful
Financing Receivable, Allowance for Credit Losses [Line Items]
Commercial and municipal risk-rated loans receivable												0	0
Municipal | Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Municipal | General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Municipal | Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	17			15	15				15	15		17	15
Total Allowance for Loan Losses	17			15	15				15	15		17	15
Allowance for loan losses
Beginning balance				15					15
Ending balance	17				15				17	15
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	17			15	15				15	15		17	15
Municipal | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Residential Term
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment												326	519	404
Allowance for Loans Evaluated Collectively for Impairment												1,065	666	695
Total Allowance for Loan Losses	1,391			1,185	1,185			1,099	1,185	1,099	1,109	1,391	1,185	1,099
Total Allowance for Loan Losses	1,391			1,185	1,185			1,099	1,185	1,099	1,109	1,391	1,185	1,099
Allowance for loan losses
Beginning balance				1,185				1,099	1,185	1,099	1,109
Chargeoffs									420	699	1,118
Recoveries									152	36	103
Provision (credit)									474	749	1,005
Ending balance	1,391				1,185				1,391	1,185	1,099
Ending balance specifically evaluated for impairment												326	519	404
Ending balance collectively evaluated for impairment												1,065	666	695
Related loan balances
Ending balance												403,030	384,032	377,218
Ending balance specifically evaluated for impairment												15,088	16,123	17,786
Ending balance collectively evaluated for impairment												387,942	367,909	359,432
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,391			1,185	1,185			1,099	1,185	1,099	1,109	1,391	1,185	1,099
Residential Term | Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	326			519	519				519	519		326	519
Total Allowance for Loan Losses	326			519	519				519	519		326	519
Allowance for loan losses
Beginning balance				519					519
Ending balance	326				519				326	519
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	326			519	519				519	519		326	519
Residential Term | General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	613			297	297				297	297		613	297
Total Allowance for Loan Losses	613			297	297				297	297		613	297
Allowance for loan losses
Beginning balance				297					297
Ending balance	613				297				613	297
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	613			297	297				297	297		613	297
Residential Term | Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	452			369	369				369	369		452	369
Total Allowance for Loan Losses	452			369	369				369	369		452	369
Allowance for loan losses
Beginning balance				369					369
Ending balance	452				369				452	369
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	452			369	369				369	369		452	369
Residential Term | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Residential Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment												0	0	0
Allowance for Loans Evaluated Collectively for Impairment												24	20	21
Total Allowance for Loan Losses	24			20	20			21	20	21	11	24	20	21
Total Allowance for Loan Losses	24			20	20			21	20	21	11	24	20	21
Allowance for loan losses
Beginning balance				20				21	20	21	11
Chargeoffs									0	0	0
Recoveries									0	25	0
Provision (credit)									4	(26)	10
Ending balance	24				20				24	20	21
Ending balance specifically evaluated for impairment												0	0	0
Ending balance collectively evaluated for impairment												24	20	21
Related loan balances
Ending balance												8,451	12,160	11,803
Ending balance specifically evaluated for impairment												0	0	0
Ending balance collectively evaluated for impairment												8,451	12,160	11,803
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	24			20	20			21	20	21	11	24	20	21
Residential Construction | Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Residential Construction | General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	14			9	9				9	9		14	9
Total Allowance for Loan Losses	14			9	9				9	9		14	9
Allowance for loan losses
Beginning balance				9					9
Ending balance	14				9				14	9
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	14			9	9				9	9		14	9
Residential Construction | Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	10			11	11				11	11		10	11
Total Allowance for Loan Losses	10			11	11				11	11		10	11
Allowance for loan losses
Beginning balance				11					11
Ending balance	10				11				10	11
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	10			11	11				11	11		10	11
Residential Construction | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Home equity line of credit
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment												29	396	54
Allowance for Loans Evaluated Collectively for Impairment												864	664	621
Total Allowance for Loan Losses	893			1,060	1,060			675	1,060	675	654	893	1,060	675
Total Allowance for Loan Losses	893			1,060	1,060			675	1,060	675	654	893	1,060	675
Allowance for loan losses
Beginning balance				1,060				675	1,060	675	654
Chargeoffs									582	153	611
Recoveries									31	16	24
Provision (credit)									384	522	608
Ending balance	893				1,060				893	1,060	675
Ending balance specifically evaluated for impairment												29	396	54
Ending balance collectively evaluated for impairment												864	664	621
Related loan balances
Ending balance												110,202	103,521	91,549
Ending balance specifically evaluated for impairment												1,466	2,087	1,648
Ending balance collectively evaluated for impairment												108,736	101,434	89,901
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	893			1,060	1,060			675	1,060	675	654	893	1,060	675
Home equity line of credit | Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	29			396	396				396	396		29	396
Total Allowance for Loan Losses	29			396	396				396	396		29	396
Allowance for loan losses
Beginning balance				396					396
Ending balance	29				396				29	396
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	29			396	396				396	396		29	396
Home equity line of credit | General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	500			376	376				376	376		500	376
Total Allowance for Loan Losses	500			376	376				376	376		500	376
Allowance for loan losses
Beginning balance				376					376
Ending balance	500				376				500	376
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	500			376	376				376	376		500	376
Home equity line of credit | Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	364			288	288				288	288		364	288
Total Allowance for Loan Losses	364			288	288				288	288		364	288
Allowance for loan losses
Beginning balance				288					288
Ending balance	364				288				364	288
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	364			288	288				288	288		364	288
Home equity line of credit | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loans Evaluated Individually for Impairment												0	0	0
Allowance for Loans Evaluated Collectively for Impairment												566	542	573
Total Allowance for Loan Losses	566			542	542			573	542	573	592	566	542	573
Total Allowance for Loan Losses	566			542	542			573	542	573	592	566	542	573
Allowance for loan losses
Beginning balance				542				573	542	573	592
Chargeoffs									350	449	430
Recoveries									121	196	183
Provision (credit)									253	222	228
Ending balance	566				542				566	542	573
Ending balance specifically evaluated for impairment												0	0	0
Ending balance collectively evaluated for impairment												566	542	573
Related loan balances
Ending balance												24,520	19,653	15,066
Ending balance specifically evaluated for impairment												0	26	0
Ending balance collectively evaluated for impairment												24,520	19,627	15,066
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	566			542	542			573	542	573	592	566	542	573
Consumer | Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Consumer | General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	331			346	346				346	346		331	346
Total Allowance for Loan Losses	331			346	346				346	346		331	346
Allowance for loan losses
Beginning balance				346					346
Ending balance	331				346				331	346
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	331			346	346				346	346		331	346
Consumer | Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	235			196	196				196	196		235	196
Total Allowance for Loan Losses	235			196	196				196	196		235	196
Allowance for loan losses
Beginning balance				196					196
Ending balance	235				196				235	196
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	235			196	196				196	196		235	196
Consumer | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				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
Allowance for Loans Evaluated Collectively for Impairment												1,873	1,662	1,678
Total Allowance for Loan Losses	1,873			1,662	1,662			1,678	1,662	1,678	842	1,873	1,662	1,678
Total Allowance for Loan Losses	1,873			1,662	1,662			1,678	1,662	1,678	842	1,873	1,662	1,678
Allowance for loan losses
Beginning balance				1,662				1,678	1,662	1,678	842
Chargeoffs									0	0	0
Recoveries									0	0	0
Provision (credit)									211	(16)	836
Ending balance	1,873				1,662				1,873	1,662	1,678
Ending balance specifically evaluated for impairment												0	0	0
Ending balance collectively evaluated for impairment												1,873	1,662	1,678
Related loan balances
Ending balance												0	0	0
Ending balance specifically evaluated for impairment												0	0	0
Ending balance collectively evaluated for impairment												0	0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	1,873			1,662	1,662			$ 1,678	1,662	1,678	$ 842	1,873	1,662	$ 1,678
Unallocated Financing Receivables | Specific Reserves on Loans Evaluated Individually for Impairment
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Unallocated Financing Receivables | General Reserves on Loans Based on Historical Loss Experience
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Unallocated Financing Receivables | Reserves for Qualitative Factors
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Allowance for loan losses
Beginning balance				0					0
Ending balance	0				0				0	0
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	0			0	0				0	0		0	0
Unallocated Financing Receivables | Unallocated Reserves
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Loan Losses	1,873			1,662	1,662				1,662	1,662		1,873	1,662
Total Allowance for Loan Losses	1,873			1,662	1,662				1,662	1,662		1,873	1,662
Allowance for loan losses
Beginning balance				1,662					1,662
Ending balance	1,873				1,662				1,873	1,662
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Total Allowance for Loan Losses	$ 1,873			$ 1,662	$ 1,662				$ 1,662	$ 1,662		$ 1,873	$ 1,662

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 37,340	$ 36,444
Less accumulated depreciation	15,524	13,825
Premises and equipment, net	21,816	22,619
2,016	111
2,017	75
2,018	13
2,019	4
2,020	4
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	4,539	4,532
Land improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	874	821
Buildings
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	20,569	20,481
Equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 11,358	$ 10,610

Other Real Estate Owned (Detail

Other Real Estate Owned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary Other Real Estate Owned [Abstract]
Real estate acquired in settlement of loans	$ 1,532	$ 3,785
Real Estate Owned Valuation Allowance [Roll Forward]
Balance at beginning of year	654	330	$ 373
Losses charged to allowance	(803)	(313)	(544)
Provision charged to operating expenses	311	637	501
Balance at end of year	$ 162	$ 654	$ 330

Income Taxes (Details)

Income Taxes (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015USD ($)limited_partnership	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)limited_partnership	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2015USD ($)limited_partnership	Dec. 31, 2014USD ($)limited_partnership	Dec. 31, 2013USD ($)
Federal income tax
Current									$ 4,895	$ 4,282	$ 3,234
Deferred									332	18	(56)
Federal income tax expense									5,227	4,300	3,178
State income tax [Abstract]
State franchise tax									287	266	247
Income tax expense	$ 1,245	$ 1,391	$ 1,458	$ 1,420	$ 1,048	$ 1,400	$ 1,155	$ 963	5,514	4,566	3,425
Reconciliation between US expected tax rate and actual tax expense
Expected tax expense									7,602	6,746	5,736
Non-taxable income									(2,086)	(2,292)	(2,326)
State franchise tax, net of federal tax benefit									187	173	160
Tax credits									(185)	(414)	(414)
Other									(4)	353	269
Income tax expense	1,245	$ 1,391	$ 1,458	$ 1,420	1,048	$ 1,400	$ 1,155	$ 963	5,514	4,566	$ 3,425
Components of deferred tax assets and liabilities
Allowance for loan losses	3,471				3,620				3,471	3,620
OREO	57				229				57	229
Accrued pension and post-retirement	1,769				1,725				1,769	1,725
Goodwill	70				138				70	138
Unrealized loss on securities transferred from available for sale to held to maturity	60				26				60	26
Restricted stock grants	367				264				367	264
Core deposit intangible	15				5				15	5
Other assets	93				48				93	48
Total deferred tax asset	5,902				6,055				5,902	6,055
Net deferred loan costs	(1,445)				(1,120)				(1,445)	(1,120)
Depreciation	(2,000)				(2,131)				(2,000)	(2,131)
Unrealized gain on securities available for sale	(605)				(1,358)				(605)	(1,358)
Mortgage servicing rights	(382)				(380)				(382)	(380)
Investment in flow through entities	(425)				(387)				(425)	(387)
Prepaid expense	(104)				(210)				(104)	(210)
Total deferred tax liability	(4,961)				(5,586)				(4,961)	(5,586)
Net deferred tax asset	$ 941				$ 469				$ 941	$ 469
Limited partnerships
Limited partnerships held as investments | limited_partnership	1				2				1	2
Tax credits from investments in limited partnerships									$ 285	$ 636
Amortization of investments in limited partnerships									266	569
Carrying value of investments in limited partnerships	$ 69				$ 457				69	457
Total exposure to limited partnerships	$ 69				$ 3,957				$ 69	$ 3,957

Certificates of Deposit (Detail

Certificates of Deposit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Certificates of deposit by balance [Abstract]
Certificates of deposit less than $100,000	$ 158,529	$ 184,471
Certificates $100,000 to $250,000	175,077	221,892
Certificates $250,000 and over	37,376	41,138
Total	370,982	447,501
Maturity of certificates of deposit [Abstract]
2,016	237,494
2,017	27,376
2,018	25,809
2,019	31,695
2,020	47,596
2021 and thereafter	1,012
Total	370,982	447,501
Interest expense on certificates of deposit of $100,000 or greater	2,431	$ 2,823	$ 3,280
Less than $100,000
Certificates of deposit by balance [Abstract]
Total	158,529
Maturity of certificates of deposit [Abstract]
2,016	103,815
2,017	14,785
2,018	9,563
2,019	14,838
2,020	15,438
2021 and thereafter	90
Total	158,529
$100,000 and Greater but Less than $250,000
Certificates of deposit by balance [Abstract]
Total	212,453
Maturity of certificates of deposit [Abstract]
2,016	133,679
2,017	12,591
2,018	16,246
2,019	16,857
2,020	32,158
2021 and thereafter	922
Total	$ 212,453

Borrowed Funds (Details)

Borrowed Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Disclosure of Repurchase Agreements [Abstract]
Range of repurchase agreements' maturity dates	one to 365
Amount of line of credit with correspondent banks	$ 48,000
Credit facility with Federal Reserve Bank	141,000
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]
Due in Twelve Months Maturity	135,220	$ 115,050
Due in Year Two Maturity	30,000	30,000
Due in Year Three Maturity	30,000	30,000
Due in Year Four Maturity	0	30,000
Due in Year Five Maturity	55,000	0
Due Thereafter	134	141
Total	250,354	205,191
Repurchase Agreements for municipal and commercial customers	87,103	74,725
Total	$ 337,457	$ 279,916	$ 297,369	$ 278,013	$ 312,576	$ 258,636	$ 298,520	$ 253,519
Minimum
Disclosure of Repurchase Agreements [Abstract]
Range of repurchase agreements' maturity dates (days)	1 day
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]
Interest Rate, Due in Next Twelve Months	0.41%	0.22%
Interest Rate, Due in Year Two	0.99%	2.36%
Interest Rate, Due in Year Three	2.25%	0.99%
Interest Rate, Due in Year Four	0.00%	2.25%
Interest Rate, Due in Year Five	1.60%	0.00%
Interest Rate, Due Thereafter	0.00%	0.00%
Securities Sold under Agreements to Repurchase, Stated Rate	0.20%	0.20%
Maximum
Disclosure of Repurchase Agreements [Abstract]
Range of repurchase agreements' maturity dates (days)	365 days
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]
Interest Rate, Due in Next Twelve Months	2.44%	2.98%
Interest Rate, Due in Year Two	3.69%	2.44%
Interest Rate, Due in Year Three	3.25%	3.69%
Interest Rate, Due in Year Four	0.00%	3.25%
Interest Rate, Due in Year Five	1.97%	0.00%
Interest Rate, Due Thereafter	0.00%	0.00%
Securities Sold under Agreements to Repurchase, Stated Rate	1.89%	1.89%

Employee Benefit Plans (Details

Employee Benefit Plans (Details)	12 Months Ended
	Dec. 31, 2015USD ($)planemployee	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Defined contribution plan [Abstract]
Defined contribution plan service period (months)	3 months
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	$ 462,000	$ 454,000	$ 414,000
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.
Non-qualified deferred compensation payable period (years)	2 years
Supplemental retirement benefits, period of benefits to be received	20 years
Pension expense	$ 312,000	722,000	$ 309,000
Accrued pension liability	$ 3,088,000	$ 2,999,000
Number of post-retirement benefit plans | plan	2
Number of active employees aged 50 and over | employee	7
Employee benefit plan age (years)	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 2016	121,000
Expected future benefit payments in 2017	122,000
Expected future benefit payments in 2018	122,000
Expected future benefit payments in 2019	122,000
Expected future benefit payments in 2020	122,000
Expected future benefit payments in 2021 through 2025	621,000
Estimated plan expense	$ 85,000
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) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Change in Benefit Obligations [Roll Forward]
Benefit obligation at beginning of year	$ 1,928	$ 1,479	$ 1,954
Service cost	0	0	21
Interest cost	80	71	86
Benefits paid	(102)	(100)	(107)
Actuarial (gain) loss				$ 61	$ 478	$ (475)
Benefit obligation at end of period	1,967	1,928	1,479
Funded Status of Plan [Abstract]
Benefit obligation at end of period	(1,928)	(1,479)	(1,954)	(1,967)	(1,928)	(1,479)
Unamortized (gain) loss				240	192	(289)
Unrecognized transition obligation				0	0	0
Accrued benefit cost				$ (1,727)	$ (1,736)	$ (1,768)
Weighted average discount rate as of December 31				0.0425	0.0425	0.050
Components of Net Periodic Benefit Cost [Abstract]
Service cost	0	0	21
Interest cost	80	71	86
Amortization of unrecognized transition obligation	0	0	5
Amortization of gain	0	(12)	0
Other settlement expense	12	10	0
Net periodic benefit cost	$ 92	$ 69	$ 112
Weighted average discount rate for net periodic cost				0.0425	0.050	0.045

Employee Benefit Plans, Schedul

Employee Benefit Plans, Schedule of Net Periodic Benefit Cost Not Yet Recognized (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unamortized net actuarial loss	$ (240)	$ (192)
Unamortized net actuarial loss	(61)	(478)	$ 475
Deferred tax benefit at 35%	84	67
Deferred tax benefit at 35%	(5,902)	(6,055)
Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss)	$ (156)	$ (125)
Accumulated other comprehensive income (loss)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unamortized net actuarial loss
Deferred tax benefit at 35%	$ 0
Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss)	$ 0

Other Comprehensive Income (L68

Other Comprehensive Income (Loss), Summary of Unrealized Gains and Losses on Available-for-Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss)	$ (1,239)	$ 1,315	$ (1,608)	$ 38	$ 962	$ (347)	$ 3,313	$ 4,824	$ (1,494)	$ 8,752	$ (14,220)
Accumulated Net Unrealized Investment Gain (Loss)
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of year				$ 2,522				$ (6,591)	2,522	(6,591)	7,940
Unrealized gains (losses) arising during the period									(754)	15,175	(21,268)
Realized gains during the period									(1,399)	(1,155)	(1,087)
Related deferred taxes									754	(4,907)	7,824
Other comprehensive income (loss)									(1,399)	9,113	(14,531)
Balance at end of year	$ 1,123				$ 2,522				$ 1,123	$ 2,522	$ (6,591)

Other Comprehensive Income (L69

Other Comprehensive Income (Loss), Summary of Transfer of AFS Securities to HTM (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ (48)	$ 0	$ 0
Net unrealized losses transferred during the period	0	(23)	0
Amortization of net unrealized losses	(98)	(51)	0
Related deferred taxes	34	26	0
Net change	(64)	(48)	0
Balance at end of period	$ (112)	$ (48)	$ 0

Other Comprehensive Income (L70

Other Comprehensive Income (Loss), Summary of Unrealized Gains and Losses on Postretirement Benefits - (Details) - Accumulated Defined Benefit Plans Adjustment - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of year	$ (125)	$ 188	$ (123)
Amortization of unrecognized transition obligation	0	0	5
Change in unamortized net actuarial gain (loss)	(48)	(481)	475
Related deferred taxes	17	168	(169)
Balance at end of year	$ (156)	$ (125)	$ 188

Preferred and Common Stock (Det

Preferred and Common Stock (Details) - USD ($)	Mar. 28, 2013	Jan. 09, 2009	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2001
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Proceeds from issuance of CPP Shares		$ 25,000,000
Number of shares of common stock issuable pursuant to the Warrants, maximum (in shares)		225,904	226,819	225,904	225,904	226,819
Exercise price of the Warrants (in dollars per share)		$ 16.60	$ 16.53			$ 16.53
Common stock
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)			562,224			562,224
Number of shares available for future use under employee savings and investment plan (in shares)			137,776			137,776
Number of shares issued during period, employee benefit plan (in shares)			13,787	14,638	11,385
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)			11,668	12,686	12,008	236,943
Number of shares for future use (in shares)			363,057
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		$ 465,000	$ 457,000	$ 11,973,000
CPP shares	$ 10,000,000
Proceeds from sale of common stock			465,000	457,000	11,973,000
Capital Purchase Program
Common stock
Proceeds from sale of common stock			$ 465,000	$ 457,000	$ 324,000

Stock Options and Stock-Based72

Stock Options and Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 1995	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
Compensation cost related to restricted stock grants		$ 1,089
Compensation expense recognized for restricted shares		296	$ 431
Unrecognized compensation costs		$ 345	$ 412
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	42,000
Granted(in shares)		0
Exercised (in shares)		0
Forfeited (in shares)		42,000
Outstanding, end of period (in shares)		0	42,000	42,000
Exercisable, end of period (in shares)		0
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	$ 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)		18
Outstanding options, weighted average exercise price, end of period (in dollars per share)		0	$ 18
Exercisable options, weighted average exercise price, end of period (in dollars per share)		$ 0
Outstanding options, end of period, weighted average remaining contractual term (in years)		0 years
Exercisable options, end of period, weighted average remaining contractual term (in years)		0 years
Exercised options, aggregate intrinsic value		$ 0
Outstanding options, end of period, aggregate intrinsic value		0
Exercisable options, end of period, aggregate intrinsic value		$ 0
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
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares		86,863
Plan 2010 | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	67,171	67,171
Remaining Term (In Years)	1 year 10 months 24 days
Plan 2010 | Restricted Stock | One Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	1 year
Shares	2,156
Remaining Term (In Years)	1 month 6 days
Plan 2010 | Restricted Stock | Two Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)			2 years
Shares			7,786
Remaining Term (In Years)			1 month 6 days
Plan 2010 | Restricted Stock | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)				3 years
Shares				3,808
Remaining Term (In Years)				1 month 6 days
Plan 2010 | Restricted Stock | Four Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)					4 years
Shares					2,704
Remaining Term (In Years)					2 months 12 days
Plan 2010 | Restricted Stock | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	5 years		5 years	5 years	5 years	5 years
Shares	12,023		10,422	14,776	7,996	5,500
Remaining Term (In Years)	4 years 1 month 6 days		3 years 1 month 6 days	2 years 1 month 6 days	1 year 2 months 12 days	1 month 6 days

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 09, 2009
Income (Numerator) [Abstract]
Net income as reported	$ 3,769	$ 4,188	$ 4,074	$ 4,175	$ 3,426	$ 4,108	$ 3,747	$ 3,428	$ 16,206	$ 14,709	$ 12,965
Less dividends and amortization of premium on preferred stock											384
Basic EPS: Income available to common shareholders									16,206	14,709	12,581
Diluted EPS: Income available to common shareholders plus assumed conversions									$ 16,206	$ 14,709	$ 12,581
Shares (Denominator) [Abstract]
Weighted average number of common shares outstanding									10,674,755	10,638,527	10,469,446
Incremental shares									90,114	72,337	51,609
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares)									10,764,869	10,710,864	10,521,055
Per-Share Amount [Abstract]
Basic EPS: Income available to common shareholders (in dollars per share)	$ 0.36	$ 0.39	$ 0.38	$ 0.39	$ 0.32	$ 0.39	$ 0.35	$ 0.32	$ 1.52	$ 1.38	$ 1.20
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share)	$ 0.35	$ 0.39	$ 0.38	$ 0.39	$ 0.32	$ 0.38	$ 0.35	$ 0.32	$ 1.51	$ 1.37	$ 1.20
Schedule of Outstanding Options And Warrants [Line Items]
Incentive stock options	0				42,000				0	42,000	42,000
Warrants to private parties	226,819				225,904				226,819	225,904	225,904	225,904
Total Dilutive Securities	226,819				267,904				226,819	267,904	267,904
In-the-Money
Schedule of Outstanding Options And Warrants [Line Items]
Incentive stock options	0				0				0	0	0
Warrants to private parties	226,819				225,904				226,819	225,904	225,904
Total Dilutive Securities	226,819				225,904				226,819	225,904	225,904
Out-of-the-Money
Schedule of Outstanding Options And Warrants [Line Items]
Incentive stock options	0				42,000				0	42,000	42,000
Warrants to private parties	0				0				0	0	0
Total Dilutive Securities	0				42,000				0	42,000	42,000

Regulatory Capital Requiremen74

Regulatory Capital Requirements (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Retained earnings from prior two years available for dividends	$ 12,738,000
Capital conservation buffer phase in, minimum	0.00%
Capital conservation buffer phase in, maximum	2.50%
Tier 1 capital to risk-weighted assets [Abstract]
Actual	$ 136,637,000	$ 128,970,000
Non Consolidated
Tier 2 capital to risk-weighted asets [Abstract]
Actual	144,255,000	137,818,000
For capital adequacy purpose	74,316,000	68,524,000
To be well-capitalized under prompt corrective action provisions	$ 92,895,000	$ 85,655,000
Risk-weighted assets [Abstract]
Actual (in hundredths)	15.53%	16.09%
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)	14.45%	14.87%
For capital adequacy purpose (in hundredths)	6.00%	4.00%
To be well-capitalized under prompt corrective action provisions (in hundredths)	8.00%	6.00%
Common equity for capital adequacy purposes (in hundredths)	4.50%
Common equity to be well-capitalized under prompt corrective action provisions (in hundredths)	6.50%
Tier 1 capital to risk-weighted assets [Abstract]
Actual	$ 134,239,000	$ 127,374,000
For capital adequacy purpose	55,737,000	34,262,000
To be well-capitalized under prompt corrective action provisions	74,316,000	51,393,000
Common equity for capital adequacy purpose	41,803,000
Common equity to be well-capitalized under prompt corrective action provisions	60,382,000
Tier 1 capital to average assets [Abstract]
Actual	134,239,000	127,374,000
For capital adequacy purpose	60,885,000	58,086,000
To be well-capitalized under prompt corrective action provisions	$ 76,106,000	$ 72,607,000
Average assets [Abstract]
Actual (in hundredths)	8.82%	8.77%
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	$ 146,653,000	$ 139,414,000
For capital adequacy purpose	$ 74,357,000	$ 68,532,000
Risk-weighted assets [Abstract]
Actual (in hundredths)	15.78%	16.27%
For capital adequacy purpose (in hundredths)	8.00%	8.00%
Actual (in hundredths)	14.70%	15.06%
For capital adequacy purpose (in hundredths)	6.00%	4.00%
Common equity for capital adequacy purposes (in hundredths)	4.50%
Tier 1 capital to risk-weighted assets [Abstract]
For capital adequacy purpose	$ 55,767,000	$ 34,266,000
Common equity for capital adequacy purpose	41,826,000
Tier 1 capital to average assets [Abstract]
Actual	136,637,000	128,970,000
For capital adequacy purpose	$ 62,022,000	$ 58,066,000
Average assets [Abstract]
Actual (in hundredths)	8.81%	8.88%
For capital adequacy purpose (in hundredths)	4.00%	4.00%

Off-Balance-Sheet Financial I75

Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet financial instruments	$ 133,549	$ 132,945
Unused lines, collateralized by residential real estate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet financial instruments	69,244	65,264
Other unused commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet financial instruments	49,833	49,608
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet financial instruments	4,098	4,480
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance-sheet financial instruments	$ 10,374	$ 13,593

Fair Value Disclosures (Details

Fair Value Disclosures (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Securities available for sale, Fair value disclosure
Allowance for loan losses, other real estate owned	$ 162	$ 654	$ 330	$ 373
Allowance for impaired loans	292	1,074
Fair Value, Measurements, Recurring
Securities available for sale, Fair value disclosure
Mortgage-backed securities	195,110	151,855
State and political subdivisions	24,506	30,855
Other equity securities	3,423	2,551
Total assets	223,039	185,261
Fair Value, Measurements, Recurring | 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 | Level 2
Securities available for sale, Fair value disclosure
Mortgage-backed securities	195,110	151,855
State and political subdivisions	24,506	30,855
Other equity securities	3,423	2,551
Total assets	223,039	185,261
Fair Value, Measurements, Recurring | 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	2,231	5,694
Other real estate owned	1,532	3,785
Impaired loans	699	1,909
Fair Value, Measurements, Nonrecurring | 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 | Level 2
Securities available for sale, Fair value disclosure
Total assets	2,231	5,694
Other real estate owned	1,532	3,785
Impaired loans	699	1,909
Fair Value, Measurements, Nonrecurring | 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 - Carryi

Fair Value Disclosures - Carrying Amounts and Estimated Fair Values (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Financial assets
Securities available for sale	$ 223,039				$ 185,261
Securities to be held to maturity, fair value	243,123				279,704
Restricted equity securities, at cost	14,257				13,912
Residential [Abstract]
Total loans	978,722				907,220
Mortgage servicing rights	1,915				2,088
Financial liabilities
Demand deposits	130,566				113,133
NOW deposits	242,638				199,977
Money market deposits	92,994				98,607
Savings deposits	206,009				165,601
Certificates of deposit	370,982				447,501
Total deposits	1,043,189	$ 1,058,365	$ 1,096,323	$ 966,825	1,024,819	$ 1,055,322	$ 1,033,436	$ 1,045,970
Level 1
Financial assets
Cash and cash equivalents	14,299				13,057
Interest-bearing deposits in other banks	4,013				3,559
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				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
Level 1 | Commercial Real Estate
Commercial [Abstract]
Loans	0				0
Level 1 | Commercial Construction
Commercial [Abstract]
Loans	0				0
Level 1 | Commercial Other Receivable
Commercial [Abstract]
Loans	0				0
Level 1 | Residential, Term, Financing Receivable
Residential [Abstract]
Loans	0				0
Level 1 | Residential, Construction, Financing Receivables
Residential [Abstract]
Loans	0				0
Level 2
Financial assets
Cash and cash equivalents	0				0
Interest-bearing deposits in other banks	0				0
Securities available for sale	223,039				185,261
Securities to be held to maturity, fair value	243,123				279,704
Restricted equity securities, at cost	14,257				13,912
Loans held for sale	349				0
Commercial [Abstract]
Municipal	0				0
Residential [Abstract]
Home equity line of credit	699				488
Consumer	0				0
Total loans	699				1,909
Mortgage servicing rights	1,915				2,088
Accrued interest receivable	4,912				4,748
Financial liabilities
Demand deposits	125,651				109,973
NOW deposits	224,627				186,490
Money market deposits	82,050				83,837
Savings deposits	181,010				146,936
Certificates of deposit	201,013				205,360
National certificates of deposit	169,617				242,824
Total deposits	983,968				975,420
Repurchase agreements	82,168				70,783
Federal Home Loan Bank advances	250,027				208,259
Total borrowed funds	332,195				279,042
Accrued interest payable	435				521
Level 2 | Commercial Real Estate
Commercial [Abstract]
Loans	0				431
Level 2 | Commercial Construction
Commercial [Abstract]
Loans	0				0
Level 2 | Commercial Other Receivable
Commercial [Abstract]
Loans	0				0
Level 2 | Residential, Term, Financing Receivable
Residential [Abstract]
Loans	0				990
Level 2 | Residential, Construction, Financing Receivables
Residential [Abstract]
Loans	0				0
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				0
Commercial [Abstract]
Municipal	20,331				20,833
Residential [Abstract]
Home equity line of credit	107,419				101,245
Consumer	23,754				19,207
Total loans	978,008				910,146
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
Level 3 | Commercial Real Estate
Commercial [Abstract]
Loans	262,763				235,937
Level 3 | Commercial Construction
Commercial [Abstract]
Loans	23,906				29,733
Level 3 | Commercial Other Receivable
Commercial [Abstract]
Loans	126,141				102,858
Level 3 | Residential, Term, Financing Receivable
Residential [Abstract]
Loans	405,315				388,210
Level 3 | Residential, Construction, Financing Receivables
Residential [Abstract]
Loans	8,379				12,123
Carrying Amount
Financial assets
Cash and cash equivalents	14,299				13,057
Interest-bearing deposits in other banks	4,013				3,559
Securities available for sale	223,039				185,261
Securities to be held to maturity, fair value	240,023				275,919
Restricted equity securities, at cost	14,257				13,912
Loans held for sale	349				0
Commercial [Abstract]
Municipal	19,730				20,406
Residential [Abstract]
Home equity line of credit	109,101				102,258
Consumer	23,822				19,007
Total loans	978,722				907,220
Mortgage servicing rights	1,093				1,086
Accrued interest receivable	4,912				4,748
Financial liabilities
Demand deposits	130,566				113,133
NOW deposits	242,638				199,977
Money market deposits	92,994				98,607
Savings deposits	206,009				165,601
Certificates of deposit	201,420				205,072
National certificates of deposit	169,562				242,429
Total deposits	1,043,189				1,024,819
Repurchase agreements	87,103				74,725
Federal Home Loan Bank advances	250,354				205,191
Total borrowed funds	337,457				279,916
Accrued interest payable	435				521
Carrying Amount | Commercial Real Estate
Commercial [Abstract]
Loans	265,616				238,104
Carrying Amount | Commercial Construction
Commercial [Abstract]
Loans	24,166				29,951
Carrying Amount | Commercial Other Receivable
Commercial [Abstract]
Loans	126,551				102,738
Carrying Amount | Residential, Term, Financing Receivable
Residential [Abstract]
Loans	401,315				382,620
Carrying Amount | Residential, Construction, Financing Receivables
Residential [Abstract]
Loans	8,421				12,136
Estimate of Fair Value
Financial assets
Cash and cash equivalents	14,299				13,057
Interest-bearing deposits in other banks	4,013				3,559
Securities available for sale	223,039				185,261
Securities to be held to maturity, fair value	243,123				279,704
Restricted equity securities, at cost	14,257				13,912
Loans held for sale	349				0
Commercial [Abstract]
Municipal	20,331				20,833
Residential [Abstract]
Home equity line of credit	108,118				101,733
Consumer	23,754				19,207
Total loans	978,707				912,055
Mortgage servicing rights	1,915				2,088
Accrued interest receivable	4,912				4,748
Financial liabilities
Demand deposits	125,651				109,973
NOW deposits	224,627				186,490
Money market deposits	82,050				83,837
Savings deposits	181,010				146,936
Certificates of deposit	201,013				205,360
National certificates of deposit	169,617				242,824
Total deposits	983,968				975,420
Repurchase agreements	82,168				70,783
Federal Home Loan Bank advances	250,027				208,259
Total borrowed funds	332,195				279,042
Accrued interest payable	435				521
Estimate of Fair Value | Commercial Real Estate
Commercial [Abstract]
Loans	262,763				236,368
Estimate of Fair Value | Commercial Construction
Commercial [Abstract]
Loans	23,906				29,733
Estimate of Fair Value | Commercial Other Receivable
Commercial [Abstract]
Loans	126,141				102,858
Estimate of Fair Value | Residential, Term, Financing Receivable
Residential [Abstract]
Loans	405,315				389,200
Estimate of Fair Value | Residential, Construction, Financing Receivables
Residential [Abstract]
Loans	$ 8,379				$ 12,123

Other Operating Income and Ex78

Other Operating Income and Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other operating expense
Advertising and marketing expense	$ 1,178	$ 1,022	$ 1,117
Accounting and auditing expenses	797	746	674
ATM and interchange expense	814	760	778
Legal fees and expenses	369	769	482
ATM And Debit Card Income
Other operating income
ATM and debit card income	2,714	2,630	2,440
Collections/Foreclosures/Other Real Estate Owned Expense
Other operating expense
Collections/foreclosures/ other real estate owned expense	$ 432	$ 657	$ 878

Condensed Financial Informati79

Condensed Financial Information of Parent (Details) - USD ($) $ in Thousands	Mar. 28, 2013	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents		$ 14,299	$ 19,169	$ 16,481	$ 13,855	$ 13,057	$ 17,167	$ 20,416	$ 13,894	$ 14,299	$ 13,057
Investments		463,062	461,255	463,064	418,772	461,180	472,660	502,015	488,553	463,062	461,180
Premises and equipment		21,816				22,619				21,816	22,619
Goodwill		29,805				29,805				29,805	29,805
Other assets		32,043				22,246				32,043	22,246
Total assets		1,564,810	1,539,672	1,553,340	1,458,832	1,482,131	1,488,637	1,504,080	1,466,117	1,564,810	1,482,131
Liabilities and shareholders' equity
Other liabilities		16,666	16,797	15,195	15,915	15,842	15,489	14,675	14,212	16,666	15,842
Total liabilities		1,397,312				1,320,577				1,397,312	1,320,577
Shareholders' equity
Common stock		108				107				108	107
Additional paid-in capital		59,862				59,282				59,862	59,282
Retained earnings		106,673				99,816				106,673	99,816
Accumulated other comprehensive income (loss)
Net unrealized gain on available for sale securities, net of tax		1,123				2,522				1,123	2,522
Total shareholders' equity		167,498	167,141	163,809	163,516	161,554	159,190	157,449	152,416	167,498	161,554	$ 146,098	$ 156,323
Total liabilities and shareholders' equity		1,564,810	1,539,672	1,553,340	1,458,832	1,482,131	1,488,637	1,504,080	1,466,117	1,564,810	1,482,131
Statements of Income
Net securities gains										1,399	1,155	1,087
Loss before income taxes and Bank earnings		5,014	5,579	5,532	5,595	4,474	5,508	4,902	4,391	21,720	19,275	16,390
Applicable tax expense		1,245	1,391	1,458	1,420	1,048	1,400	1,155	963	5,514	4,566	3,425
Equity in earnings of Bank
Net income		3,769	4,188	4,074	4,175	3,426	4,108	3,747	3,428	16,206	14,709	12,965
Cash flows from operating activities
Net income		3,769	$ 4,188	$ 4,074	4,175	3,426	$ 4,108	$ 3,747	3,428	16,206	14,709	12,965
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation										1,720	1,663	1,727
Equity compensation expense										296	431	214
Gain on sale of investment										(1,399)	(1,155)	(1,087)
Increase in other assets										(455)	676	1,557
Increase in other liabilities										1,418	378	1,370
Net cash provided by operating activities										20,742	20,463	24,984
Cash flows from investing activities
Capital expenditures										(927)	(1,909)	(2,363)
Net cash used in investing activities										(86,347)	(16,751)	(75,957)
Cash flows from financing activities
Payment to repurchase preferred stock										0	0	(12,500)
Purchase of common stock										(180)	0	0
Proceeds from sale of common stock	$ 11,649									465	457	11,973
Dividends paid										(9,349)	(8,893)	(8,657)
Net cash used in financing activities										66,847	(7,225)	52,585
Net increase (decrease) in cash and cash equivalents										1,242	(3,513)	1,612
Cash and cash equivalents at beginning of year					13,057				16,570	13,057	16,570	14,958
Cash and cash equivalents at end of year		14,299				13,057				14,299	13,057	16,570
Parent Company
Assets
Cash and cash equivalents		1,431				522				1,431	522
Dividends receivable		2,500				2,500				2,500	2,500
Investments		509				528				509	528
Investment in subsidiary		137,433				132,399				137,433	132,399
Premises and equipment		12				24				12	24
Goodwill		27,559				27,559				27,559	27,559
Other assets		438				302				438	302
Total assets		169,882				163,834				169,882	163,834
Liabilities and shareholders' equity
Dividends payable		2,366				2,252				2,366	2,252
Other liabilities		18				28				18	28
Total liabilities		2,384				2,280				2,384	2,280
Shareholders' equity
Common stock		108				107				108	107
Additional paid-in capital		59,862				59,282				59,862	59,282
Retained earnings		107,500				102,125				107,500	102,125
Accumulated other comprehensive income (loss)
Net unrealized gain on available for sale securities, net of tax		28				40				28	40
Total accumulated other comprehensive income		28				40				28	40
Total shareholders' equity		167,498				161,554				167,498	161,554
Total liabilities and shareholders' equity		169,882				163,834				169,882	163,834
Statements of Income
Interest and dividends on investments										18	15	10
Net securities gains										0	38	0
Total income										18	53	10
Occupancy expense										12	12	11
Other operating expense										488	604	362
Total expense										500	616	373
Loss before income taxes and Bank earnings										(482)	(563)	(363)
Applicable tax expense										(172)	(200)	(128)
Loss before Bank earnings										(310)	(363)	(235)
Equity in earnings of Bank
Remitted										10,000	8,850	7,096
Unremitted										6,516	6,222	6,104
Net income										16,206	14,709	12,965
Cash flows from operating activities
Net income										16,206	14,709	12,965
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation										12	9	11
Equity compensation expense										296	431	214
Gain on sale of investment										0	(38)	0
Increase in other assets										(135)	(98)	(132)
(Increase) decrease in dividend receivable										(50)	(1,050)	400
Increase in other liabilities										160	105	258
Unremitted earnings of Bank										(6,516)	(6,222)	(6,104)
Net cash provided by operating activities										9,973	7,846	7,612
Cash flows from investing activities
Capital expenditures										0	(1)	0
Net cash used in investing activities										0	(1)	0
Cash flows from financing activities
Payment to repurchase preferred stock										0	0	(12,500)
Purchase of common stock										(180)	0	0
Proceeds from sale of common stock										465	457	11,973
Dividends paid										(9,349)	(8,893)	(8,657)
Net cash used in financing activities										(9,064)	(8,436)	(9,184)
Net increase (decrease) in cash and cash equivalents										909	(591)	(1,572)
Cash and cash equivalents at beginning of year					$ 522				$ 1,113	522	1,113	2,685
Cash and cash equivalents at end of year		$ 1,431				$ 522				$ 1,431	$ 522	$ 1,113

Quarterly Information (Details)

Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Balance Sheets
Cash and cash equivalents	$ 14,299	$ 19,169	$ 16,481	$ 13,855	$ 13,057	$ 17,167	$ 20,416	$ 13,894	$ 14,299	$ 13,057
Interest-bearing deposits in other banks	4,013	301	24,565	336	3,559	773	272	2,935	4,013	3,559
Investments	463,062	461,255	463,064	418,772	461,180	472,660	502,015	488,553	463,062	461,180
Restricted equity securities	14,257	13,912	13,912	13,912	13,912	13,912	13,912	13,912	14,257	13,912
Net loans and loans held for sale	979,071	953,674	953,201	928,973	907,220	896,857	880,492	857,315	979,071	907,220
Other assets	90,108	91,361	82,117	82,984	83,203	87,268	86,973	89,508	90,108	83,203
Total assets	1,564,810	1,539,672	1,553,340	1,458,832	1,482,131	1,488,637	1,504,080	1,466,117	1,564,810	1,482,131
Deposits	1,043,189	1,058,365	1,096,323	966,825	1,024,819	1,055,322	1,033,436	1,045,970	1,043,189	1,024,819
Borrowed funds	337,457	297,369	278,013	312,576	279,916	258,636	298,520	253,519	337,457	279,916
Other liabilities	16,666	16,797	15,195	15,915	15,842	15,489	14,675	14,212	16,666	15,842
Shareholders' equity	167,498	167,141	163,809	163,516	161,554	159,190	157,449	152,416	167,498	161,554	$ 146,098	$ 156,323
Total liabilities and shareholders' equity	1,564,810	1,539,672	1,553,340	1,458,832	1,482,131	1,488,637	1,504,080	1,466,117	1,564,810	1,482,131
Statements of Income
Interest income	13,038	12,833	12,574	12,365	12,790	12,869	12,740	12,623	50,810	51,022	49,936
Interest expense	2,393	2,322	2,496	2,663	2,743	2,865	2,905	2,912	9,874	11,425	12,496
Net interest income	10,645	10,511	10,078	9,702	10,047	10,004	9,835	9,711	40,936	39,597	37,440
Provision for loan losses	450	200	400	500	300	350	100	400	1,550	1,150	4,200
Net interest income after provision for loan losses	10,195	10,311	9,678	9,202	9,747	9,654	9,735	9,311	39,386	38,447	33,240
Non-interest income	2,763	2,975	2,834	3,658	2,602	3,656	2,458	2,332	12,230	11,048	12,087
Non-interest expense	7,944	7,707	6,980	7,265	7,875	7,802	7,291	7,252	29,896	30,220	28,937
Loss before income taxes and Bank earnings	5,014	5,579	5,532	5,595	4,474	5,508	4,902	4,391	21,720	19,275	16,390
Applicable tax expense	1,245	1,391	1,458	1,420	1,048	1,400	1,155	963	5,514	4,566	3,425
Net income	$ 3,769	$ 4,188	$ 4,074	$ 4,175	$ 3,426	$ 4,108	$ 3,747	$ 3,428	$ 16,206	$ 14,709	$ 12,965
Basic earnings per common share (in usd per share)	$ 0.36	$ 0.39	$ 0.38	$ 0.39	$ 0.32	$ 0.39	$ 0.35	$ 0.32	$ 1.52	$ 1.38	$ 1.20
Diluted earnings per common share (in usd per share)	$ 0.35	$ 0.39	$ 0.38	$ 0.39	$ 0.32	$ 0.38	$ 0.35	$ 0.32	$ 1.51	$ 1.37	$ 1.20
Other comprehensive income (loss), net of tax
Net unrealized gain (loss) on securities available for sale	$ (1,195)	$ 1,330	$ (1,591)	$ 57	$ 1,295	$ (319)	$ 3,313	$ 4,824	$ (1,399)	$ 9,113	$ (14,531)
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(13)	(15)	(17)	(19)	(20)	(28)	0	0	(64)	(48)	0
Unrecognized loss on postretirement benefit costs	(31)	0	0	0	(313)	0	0	0	(31)	(313)	311
Other comprehensive income (loss)	(1,239)	1,315	(1,608)	38	962	(347)	3,313	4,824	(1,494)	8,752	(14,220)
Comprehensive income	$ 2,530	$ 5,503	$ 2,466	$ 4,213	$ 4,388	$ 3,761	$ 7,060	$ 8,252	$ 14,712	$ 23,461	$ (1,255)