Pathfinder Bancorp (PBHC) 10-K 30 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Mar. 26, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Entity Registrant Name	PATHFINDER BANCORP, INC.
Entity Central Index Key	1,609,065
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	Smaller Reporting Company
Entity Public Float			$ 66.9
Entity Common Stock, Shares Outstanding		4,292,586
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Trading Symbol	PBHC

Consolidated Statements of Cond

Consolidated Statements of Condition - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS:
Cash and due from banks	$ 9,708	$ 6,968
Interest-earning deposits	12,283	15,451
Total cash and cash equivalents	21,991	22,419
Available-for-sale securities, at fair value	171,138	141,955
Held-to-maturity securities, at amortized cost (fair value of $66,426 and $54,429, respectively)	66,196	54,645
Federal Home Loan Bank stock, at cost	3,855	3,250
Loans	580,831	492,147
Less: Allowance for loan losses	7,126	6,247
Loans receivable, net	573,705	485,900
Premises and equipment, net	16,117	15,177
Accrued interest receivable	3,047	2,532
Foreclosed real estate	468	597
Intangible assets, net	182	198
Goodwill	4,536	4,536
Bank owned life insurance	11,742	11,458
Other assets	8,280	6,367
Total assets	881,257	749,034
Deposits:
Interest-bearing	633,820	535,701
Noninterest-bearing	89,783	75,282
Total deposits	723,603	610,983
Short-term borrowings	30,600	41,947
Long-term borrowings	43,288	17,000
Subordinated loans	15,059	15,025
Accrued interest payable	186	75
Other liabilities	6,377	5,643
Total liabilities	819,113	690,673
Shareholders' equity:
Common stock, par value $0.01; 25,000,000 authorized shares; 4,280,227 and 4,236,744 shares outstanding, respectively	43	43
Additional paid in capital	28,170	27,483
Retained earnings	39,020	35,619
Accumulated other comprehensive loss	(4,208)	(3,822)
Unearned ESOP	(1,214)	(1,394)
Total Pathfinder Bancorp, Inc. shareholders' equity	61,811	57,929
Noncontrolling interest	333	432
Total equity	62,144	58,361
Total liabilities and shareholders' equity	$ 881,257	$ 749,034

Consolidated Statements of Con3

Consolidated Statements of Condition (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS:
Held-to-maturity securities at fair value	$ 66,426	$ 54,429
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares outstanding (in shares)	4,280,227	4,236,744

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Interest and dividend income:
Loans, including fees	$ 24,392	$ 20,703
Debt securities:
Taxable	3,598	2,327
Tax-exempt	1,038	865
Dividends	229	134
Federal funds sold and interest earning deposits	156	64
Total interest and dividend income	29,413	24,093
Interest expense:
Interest on deposits	3,904	2,441
Interest on short-term borrowings	997	301
Interest on long-term borrowings	595	270
Interest on subordinated loans	794	792
Total interest expense	6,290	3,804
Net interest income	23,123	20,289
Provision for loan losses	1,769	953
Net interest income after provision for loan losses	21,354	19,336
Noninterest income:
Service charges on deposit accounts	1,130	1,141
Earnings and gain on bank owned life insurance	284	307
Loan servicing fees	149	138
Net gains on sales and redemptions of investment securities	489	594
Net gains (losses) on sales of loans and foreclosed real estate	37	(40)
Debit card interchange fees	578	557
Other charges, commissions & fees	1,512	1,486
Total noninterest income	4,179	4,183
Noninterest expense:
Salaries and employee benefits	11,917	10,772
Building occupancy	2,196	1,936
Data processing	1,779	1,682
Professional and other services	952	834
Advertising	809	730
FDIC assessments	473	345
Audits and exams	353	329
Other expenses	2,709	2,482
Total noninterest expenses	21,188	19,110
Income before income taxes	4,345	4,409
Provision for income taxes	922	1,111
Net income attributable to noncontrolling interest and Pathfinder Bancorp, Inc.	3,423	3,298
Net (loss) income attributable to noncontrolling interest	(68)	26
Net income attributable to Pathfinder Bancorp Inc.	3,491	3,272
Preferred stock dividends		16
Net income available to common shareholders	$ 3,491	$ 3,256
Earnings per common share - basic	$ 0.86	$ 0.79
Earnings per common share - diluted	0.83	0.78
Dividends per common share	$ 0.215	$ 0.200

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Consolidated Statements of Comprehensive Income [Abstract]
Net Income		$ 3,423	$ 3,298
Retirement Plans:
Retirement plan net losses recognized in plan expenses		150	222
Plan (losses) gains not recognized in plan expenses		(631)	330
Net unrealized (loss) gain on retirement plans		(481)	552
Unrealized holding gains on financial derivative:
Change in unrealized holding gains on financial derivative			2
Reclassification adjustment for interest expense included in net income			25
Net unrealized gain on financial derivative			27
Unrealized holding gains (losses) on available for sale securities
Unrealized holding gains (losses) arising during the period		1,454	(2,394)
Reclassification adjustment for net gains included in net income		(489)	(594)
Net unrealized gain (loss) on available for sale securities		965	(2,988)
Accretion of net unrealized loss on securities transferred to held-to-maturity	[1]	191	316
Other comprehensive income (loss), before tax		675	(2,093)
Tax effect		(271)	836
Other comprehensive income (loss), net of tax		404	(1,257)
Comprehensive income		3,827	2,041
Comprehensive (loss) income, attributable to noncontrolling interest		(68)	26
Comprehensive income attributable to Pathfinder Bancorp, Inc.		3,895	2,015
Tax Effect Allocated to Each Component of Other Comprehensive Loss
Retirement plan net losses recognized in plan expenses		(61)	(87)
Plan (losses) gains not recognized in plan expenses		252	(134)
Change in unrealized holding gains on financial derivative			(1)
Reclassification adjustment for interest expense included in net income			(10)
Unrealized holding gains (losses) arising during the period		(582)	958
Reclassification adjustment for net gains included in net income		196	236
Accretion of net unrealized loss on securities transferred to held-to-maturity	[1]	(76)	(126)
Income tax effect related to other comprehensive income		$ (271)	$ 836
[1]	The accretion of the unrealized holding losses in accumulated other comprehensive loss at the date of transfer at September 30, 2013 partially offsets the amortization of the difference between the par value and the fair value of the investment securities at the date of transfer, and is an adjustment of yield.

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($)		Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Unearned ESOP [Member]	Non-controlling Interest [Member]
Balance at Dec. 31, 2015		$ 71,229,000	$ 13,000,000	$ 44,000	$ 28,717,000	$ 33,183,000	$ (2,565,000)	$ (1,574,000)	$ 424,000
Net Income		3,298,000				3,272,000			26,000
Other comprehensive income (loss), net of tax		(1,257,000)					(1,257,000)
Preferred stock redemption		(13,000,000)	$ (13,000,000)
Preferred stock dividends - SBLF		(16,000)				(16,000)
ESOP shares earned		293,000			113,000			180,000
Stock based compensation		264,000			264,000
Stock options exercised		143,000			143,000
Purchase of common stock shares		(1,755,000)		(1,000)	(1,754,000)
Common stock dividends declared		(820,000)				(820,000)
Distributions from affiliates		(18,000)							(18,000)
Balance at Dec. 31, 2016		58,361,000		43,000	27,483,000	35,619,000	(3,822,000)	(1,394,000)	432,000
Net Income		3,423,000				3,491,000			(68,000)
Other comprehensive income (loss), net of tax		404,000					404,000
ESOP shares earned		367,000			187,000			180,000
Stock based compensation		345,000			345,000
Stock options exercised		155,000			155,000
Common stock dividends declared		(880,000)				(880,000)
Reclassification of effect of tax rate change	[1]	(790,000)				790,000	(790,000)
Distributions from affiliates		(31,000)							(31,000)
Balance at Dec. 31, 2017		$ 62,144,000		$ 43,000	$ 28,170,000	$ 39,020,000	$ (4,208,000)	$ (1,214,000)	$ 333,000
[1]	Reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the newly enacted Federal corporate income tax rate reduction from 34% to 21%.

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Preferred stock redemption (in shares)		(13,000)
Restricted stock awards (in shares)	15,720
ESOP shares earned (in shares)	24,442	18,332
Dividends per common share	$ 0.215	$ 0.200
Purchase of common stock shares (in shares)		143,400
Federal corporate income tax rate	34.00%	34.00%

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES
Net income attributable to Pathfinder Bancorp, Inc.	$ 3,491	$ 3,272
Adjustments to reconcile net income to net cash flows from operating activities:
Provision for loan losses	1,769	953
Deferred income tax (benefit)	(100)	(249)
Proceeds from sale of loans	53	202
Originations of loans held-for-sale	(53)	(197)
Realized (gains) losses on sales, redemptions and calls of:
Real estate acquired through foreclosure	(31)	50
Loans	(6)	(10)
Available-for-sale investment securities	(29)	(456)
Held-to-maturity investment securities	(32)	(53)
Depreciation	1,035	1,019
Amortization of mortgage servicing rights	28	12
Amortization of deferred loan costs	322	222
Amortization of deferred financing from subordinated debt	34	34
Earnings and gain on bank owned life insurance	(284)	(307)
Net amortization of premiums and discounts on investment securities	1,678	1,211
Amortization of intangible assets	16	16
Stock based compensation and ESOP expense	712	557
Net change in accrued interest receivable	(515)	(479)
Net change in other assets and liabilities	(1,246)	574
Net cash flows from operating activities	6,842	6,371
INVESTING ACTIVITIES
Purchase of investment securities available-for-sale	(132,748)	(145,264)
Purchase of investment securities held-to-maturity	(21,449)	(16,859)
Net (purchases of) proceeds of Federal Home Loan Bank stock	(605)	(826)
Proceeds from maturities and principal reductions of investment securities available-for-sale	38,262	68,506
Proceeds from maturities and principal reductions of investment securities held-to-maturity	7,080	3,659
Proceeds from sales, redemptions and calls of:
Available-for-sale investment securities	65,010	30,228
Held-to-maturity investment securities	2,635	3,000
Real estate acquired through foreclosure	993	279
Realized gains on hedging activity	(428)	(85)
Net change in loans	(90,718)	(62,733)
Purchase of premises and equipment	(1,975)	(1,362)
Net cash flows from investing activities	(133,943)	(121,457)
FINANCING ACTIVITIES
Net change in demand deposits, NOW accounts, savings accounts, money management deposit accounts, MMDA accounts and escrow deposits	92,470	57,830
Net change in time deposits	18,329	28,594
Net change in brokered deposits	1,821	34,244
Net change in short-term borrowings	(11,347)	17,147
Payments on long-term borrowings	(7,000)	(3,000)
Proceeds from long-term borrowings	33,228	3,500
Repayment of loan on cash surrender value of bank owned life insurance	0	(536)
Redemption of preferred stock - SBLF	0	(13,000)
Purchase of common stock	0	(1,755)
Proceeds from exercise of stock options	155	143
Cash dividends paid to preferred shareholder - SBLF	0	(49)
Cash dividends paid to common shareholders	(884)	(866)
Change in noncontrolling interest, net	(99)	8
Net cash flows from financing activities	126,673	122,260
Change in cash and cash equivalents	(428)	7,174
Cash and cash equivalents at beginning of period	22,419	15,245
Cash and cash equivalents at end of period	21,991	22,419
CASH PAID DURING THE PERIOD FOR:
Interest	6,179	3,928
Income taxes	945	970
NON-CASH INVESTING ACTIVITY
Real estate acquired in exchange for loans	$ 822	$ 390

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	NOTE 1: Summary of Significant Accounting Policies Nature of Operations The accompanying consolidated financial statements include the accounts of Pathfinder Bancorp, Inc. (the “Company”) and its wholly owned subsidiary, Pathfinder Bank (the “Bank”). The Company is a Maryland corporation headquartered in Oswego, New York. On October 16, 2014, the Company completed its conversion from the mutual holding company structure and the related public offering and is now a stock holding company that is fully owned by the public. As a result of the conversion, the mutual holding company and former mid-tier holding company were merged into Pathfinder Bancorp, Inc. The primary business of the Company is its investment in Pathfinder Bank (the "Bank") which is 100% owned by the Company. The Company sold 2,636,053 shares of common stock in the offering, including 105,442 shares sold to the Pathfinder Bank employee stock ownership plan (“ESOP”). All shares were sold at a price of $10.00 per share raising $26.4 million in gross proceeds. Additionally, $197,000 in cash was received from the merger of MHC into the company; and after accounting for conversion related expenses of $1.5 million, the Company received $24.9 million in net proceeds. Concurrent with the completion of the offering, publicly owned shares of Pathfinder Bancorp, Inc., a federal corporation, were exchanged for 1.6472 shares of the Company’s common stock. At December 31, 2017, 4,280,227 shares of common stock were outstanding. The Bank has two wholly owned operating subsidiaries, Pathfinder Risk Management Company, Inc. (“PRMC”) and Whispering Oaks Development Corp. All significant inter-company accounts and activity have been eliminated in consolidation. Although the Company owns, through its subsidiary PRMC, 51% of the membership interest in FitzGibbons Agency, LLC (“FitzGibbons”), the Company is required to consolidate 100% of FitzGibbons within the consolidated financial statements. The 49% of which the Company does not own is accounted for separately as noncontrolling interests within the consolidated financial statements. The Company has seven branch offices located in Oswego County and two branch offices in Onondaga County and one loan production office in Oneida County. The Company is primarily engaged in the business of attracting deposits from the general public in the Company’s market area, and investing such deposits, together with other sources of funds, in loans secured by commercial real estate, business assets, one-to-four family residential real estate and investment securities. Use of Estimates in the Preparation of Consolidated Financial Statements The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Management has identified the allowance for loan losses, deferred income taxes, pension obligations, the annual evaluation of the Company’s goodwill for possible impairment and the evaluation of investment securities for other than temporary impairment and the estimation of fair values for accounting and disclosure purposes to be the accounting areas that require the most subjective and complex judgments, and as such, could be the most subject to revision as new information becomes available. The Company is subject to the regulations of various governmental agencies. The Company also undergoes periodic examinations by the regulatory agencies which may subject it to further changes with respect to asset valuations, amounts of required loss allowances, and operating restrictions resulting from the regulators' judgments based on information available to them at the time of their examinations. Significant Group Concentrations of Credit Risk Most of the Company’s activities are with customers located primarily in Oswego and Onondaga counties of New York State. A large portion of the Company’s portfolio is centered in residential and commercial real estate. The Company closely monitors real estate collateral values and requires additional reviews of commercial real estate appraisals by a qualified third party for commercial real estate loans in excess of $400,000. All residential loan appraisals are reviewed by an individual or third party who is independent of the loan origination or approval process and was not involved in the approval of appraisers or selection of the appraiser for the transaction, and has no direct or indirect interest, financial or otherwise in the property or the transaction. Advertising The Company follows the policy of charging the costs of advertising to expense as incurred. Noncontrolling Interest Noncontrolling interest represents the portion of ownership and profit or loss that is attributable to the minority owners of the FitzGibbons Agency. Cash and Cash Equivalents Cash and cash equivalents include cash on hand, amounts due from banks and interest-bearing deposits (with original maturity of three months or less). Investment Securities The Company classifies investment securities as either available-for-sale or held-to-maturity. The Company does not hold any securities considered to be trading. Available-for-sale securities are reported at fair value, with net unrealized gains and losses reflected as a separate component of shareholders’ equity, net of the applicable income tax effect. Held-to-maturity securities are those that the Company has the ability and intent to hold until maturity and are reported at amortized cost. Gains or losses on investment security transactions are based on the amortized cost of the specific securities sold. Premiums and discounts on securities are amortized and accreted into income using the interest method over the period to maturity. Note 4 to the consolidated financial statements includes additional information about the Company’s accounting policies with respect to the impairment of investment securities. Federal Home Loan Bank Stock Federal law requires a member institution of the Federal Home Loan Bank (“FHLB”) system to hold stock of its district FHLB according to a predetermined formula. The stock is carried at cost. Transfers of Financial Assets Transfers of financial assets, including sales of loans and loan participations, are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Loans The Company grants mortgage, commercial, municipal, and consumer loans to customers. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are stated at their outstanding unpaid principal balances, less the allowance for loan losses plus net deferred loan origination costs. The ability of the Company’s debtors to honor their contracts is dependent upon the real estate and general economic conditions in the market area. Interest income is generally recognized when income is earned using the interest method. Nonrefundable loan fees received and related direct origination costs incurred are deferred and amortized over the life of the loan using the interest method, resulting in a constant effective yield over the loan term. Deferred fees are recognized into income and deferred costs are charged to income immediately upon prepayment of the related loan. The loans receivable portfolio is segmented into residential mortgage, commercial and consumer loans. The residential mortgage segment consists of one-to-four family first-lien residential mortgages and construction loans. Commercial loans consist of the following classes: real estate, lines of credit, other commercial and industrial, and tax-exempt loans. Consumer loans include both home equity lines of credit and loans with junior liens and other consumer loans. Allowance for Loan Losses The allowance for loan losses represents management’s estimate of losses inherent in the loan portfolio as of the date of the statement of condition and it is recorded as a reduction of loans. The allowance is increased by the provision for loan losses, and decreased by charge-offs, net of recoveries. Loans deemed to be uncollectible are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance. All, or part, of the principal balance of loans receivable are charged off to the allowance as soon as it is determined that the repayment of all, or part, of the principal balance is highly unlikely. Non-residential consumer loans are generally charged off no later than 120 days past due on a contractual basis, unless productive collection efforts are providing results. Consumer loans may be charged off earlier in the event of bankruptcy, or if there is an amount that is deemed uncollectible. No portion of the allowance for loan losses is restricted to any individual loan product and the entire allowance is available to absorb any and all loan losses. The allowance for loan losses is maintained at a level considered adequate to provide for losses that can be reasonably anticipated. Management performs a quarterly evaluation of the adequacy of the allowance. The allowance is based on three major components which are; specific components for larger loans, recent historical losses and several qualitative factors applied to a general pool of loans, and an unallocated component. The first component is the specific component that relates to loans that are classified as impaired. For these loans, an allowance is established when the discounted cash flows or collateral value of the impaired loan is lower than the carrying value of that loan. The second or general component covers pools of loans, by loan class, not considered impaired, smaller balance homogeneous loans, such as residential real estate, home equity and other consumer loans. These pools of loans are evaluated for loss exposure first based on historical loss rates for each of these categories of loans. The ratio of net charge-offs to loans outstanding within each product class, over the most recent eight quarters, lagged by one quarter, is used to generate the historical loss rates. In addition, qualitative factors are added to the historical loss rates in arriving at the total allowance for loan loss need for this general pool of loans. The qualitative factors include changes in national and local economic trends, the rate of growth in the portfolio, trends of delinquencies and nonaccrual balances, changes in loan policy, and changes in lending management experience and related staffing. Each factor is assigned a value to reflect improving, stable or declining conditions based on management’s best judgment using relevant information available at the time of the evaluation. These qualitative factors, applied to each product class, make the evaluation inherently subjective, as it requires material estimates that may be susceptible to significant revision as more information becomes available. Adjustments to the factors are supported through documentation of changes in conditions in a narrative accompanying the allowance for loan loss analysis and calculation. The third or unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio and generally comprises less than 10% of the total allowance for loan loss. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and shortfalls on a case-by case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length and reason for the delay, the borrower’s prior payment record and the amount of shortfall in relation to what is owed. Impairment is measured by either the present value of the expected future cash flows discounted at the loan’s effective interest rate or the fair value of the underlying collateral if the loan is collateral dependent. The majority of the Company’s loans utilize the fair value of the underlying collateral. An allowance for loan loss is established for an impaired loan if its carrying value exceeds its estimated fair value. The estimated fair values of substantially all of the Company’s impaired loans are measured based on the estimated fair value of the loan’s collateral. For loans secured by real estate, estimated fair values are determined primarily through third-party appraisals, less costs to sell. Appraised values are discounted to arrive at the estimated selling price of the collateral, which is considered to be the estimated fair value. The discounts also include estimated costs to sell the property. For commercial and industrial loans secured by non-real estate collateral, such as accounts receivable, inventory and equipment, estimated fair values are determined based on the borrower’s financial statements, inventory reports, accounts receivable agings or equipment appraisals or invoices. Indications of value from these sources are generally discounted based on the age of the financial information or the quality of the assets. Large groups of homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual residential mortgage loans less than $300,000, home equity and other consumer loans for impairment disclosures, unless such loans are related to borrowers with impaired commercial loans or they are subject to a troubled debt restructuring agreement. Loans that are related to borrowers with impaired commercial loans or are subject to a troubled debt restructuring agreement are evaluated individually for impairment. . Commercial loans whose terms are modified are classified as troubled debt restructurings if the Company grants such borrowers concessions and it is deemed that those borrowers are experiencing financial difficulty. Concessions granted under a troubled debt restructuring generally include but are not limited to a temporary reduction in the interest rate or an extension of a loan’s stated maturity date. Commercial loans classified as troubled debt restructurings are designated as impaired and evaluated individually as discussed above. The allowance calculation methodology includes further segregation of loan classes into risk rating categories. The borrower’s overall financial condition, repayment sources, guarantors and value of the collateral, if appropriate, are evaluated not less than annually for commercial loans or when credit deficiencies arise on all loans. Credit quality risk ratings include regulatory classifications of special mention, substandard, doubtful and loss. See Note 5 for a description of these regulatory classifications. In addition, Federal and State regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses and may require the Company to recognize additions to the allowance based on their judgments about information available to them at the time of their examination, which may not be currently available to management. Based on management’s comprehensive analysis of the loan portfolio, management believes the current level of the allowance for loan losses is adequate. Income Recognition on Impaired and Nonaccrual Loans For all classes of loans receivable, the accrual of interest is discontinued when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about further collectability of principal or interest, even though the loan may be currently performing. A loan may remain on accrual status if it is either well secured or guaranteed and in the process of collection. When a loan is placed on nonaccrual status, unpaid interest is reversed and charged to interest income. Interest received on nonaccrual loans, including impaired loans, generally is either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Generally, loans are restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time, generally six months, and the ultimate collectability of the total contractual principal and interest is no longer in doubt. Nonaccrual troubled debt restructurings are restored to accrual status if principal and interest payments, under the modified terms, are current for six consecutive months after modification. For nonaccrual loans, when future collectability of the recorded loan balance is expected, interest income may be recognized on a cash basis. In the case where a nonaccrual loan had been partially charged off, recognition of interest on a cash basis is limited to that which would have been recognized on the recorded loan balance at the contractual interest rate. Cash interest receipts in excess of that amount are recorded as recoveries to the allowance for loan losses until prior charge-offs have been fully recovered. Off-Balance Sheet Credit Related Financial Instruments In the ordinary course of business, the Company has entered into commitments to extend credit, including commitments under standby letters of credit. Such financial instruments are recorded when they are funded. Premises and Equipment Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is computed on a straight-line basis over the estimated useful lives of the related assets, ranging up to 40 years for premises and 10 years for equipment. Maintenance and repairs are charged to operating expenses as incurred. The asset cost and accumulated depreciation are removed from the accounts for assets sold or retired and any resulting gain or loss is included in the determination of income. Foreclosed Real Estate Physical possession of residential real estate property collateralizing a residential mortgage loan occurs when legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through completion of a deed-in-lieu of foreclosure or through a similar legal agreement. Properties acquired through foreclosure, or by deed-in-lieu of foreclosure, are recorded at their fair value less estimated costs to sell. Fair value is typically determined based on evaluations by third parties. Costs incurred in connection with preparing the foreclosed real estate for disposition are capitalized to the extent that they enhance the overall fair value of the property. Any write-downs on the asset’s fair value less costs to sell at the date of acquisition are charged to the allowance for loan losses. Subsequent write downs and expenses of foreclosed real estate are included as a valuation allowance and recorded in noninterest expense. Goodwill and Intangible Assets Goodwill represents the excess cost of an acquisition over the fair value of the net assets acquired. Goodwill is not amortized, but is evaluated annually for impairment. Intangible assets, such as customer relationships, are amortized over their useful lives, generally 15 years. Mortgage Servicing Rights Originated mortgage servicing rights are recorded at their fair value at the time of transfer of the related loans and are amortized in proportion to, and over the period of, estimated net servicing income or loss. The carrying value of the originated mortgage servicing rights is periodically evaluated for impairment or between annual evaluations under certain circumstances. Stock-Based Compensation Compensation costs related to share-based payment transactions are recognized based on the grant-date fair value of the stock-based compensation issued. Compensation costs are recognized over the period that an employee provides service in exchange for the award. Compensation costs related to the Employee Stock Ownership Plan are dependent upon the average stock price and the shares committed to be released to plan participants through the period in which income is reported. Retirement Benefits The Company has a non-contributory defined benefit pension plan that covered substantially all employees. On May 14, 2012, the Company informed its employees of its decision to freeze participation and benefit accruals under the plan, primarily to reduce some of the volatility in earnings that can accompany the maintenance of a defined benefit plan. The plan was frozen on June 30, 2012. Compensation earned by employees up to June 30, 2012 is used for purposes of calculating benefits under the plan but there will be no future benefit accruals after this date. Participants as of June 30, 2012 will continue to earn vesting credit with respect to their frozen accrued benefits as they continue to work. Pension expense under these plans is charged to current operations and consists of several components of net pension cost based on various actuarial assumptions regarding future experience under the plans. Gains and losses, prior service costs and credits, and any remaining transition amounts that have not yet been recognized through net periodic benefit cost are recognized in accumulated other comprehensive loss, net of tax effects, until they are amortized as a component of net periodic cost. Plan assets and obligations are measured as of the Company’s statement of condition date. The Company has unfunded deferred compensation and supplemental executive retirement plans for selected current and former employees and officers that provide benefits that cannot be paid from a qualified retirement plan due to Internal Revenue Code restrictions. These plans are nonqualified under the Internal Revenue Code, and assets used to fund benefit payments are not segregated from other assets of the Company, therefore, in general, a participant's or beneficiary's claim to benefits under these plans is as a general creditor. The Bank sponsors an Employee Stock Ownership Plan (“ESOP”) covering substantially all full time employees. The cost of shares issued to the ESOP but not committed to be released to the participants is presented in the consolidated statement of condition as a reduction of shareholders’ equity. ESOP shares are released to the participants on an annual basis in accordance with a predetermined schedule. The Company records ESOP compensation expense based on the shares committed to be released and allocated to the participant’s accounts multiplied by the average share price of the Company’s stock over the period. Dividends related to unallocated shares are recorded as compensation expense. Derivative Financial Instruments Derivatives are recorded on the statement of condition as assets and liabilities measured at their fair value. The accounting for increases and decreases in the value of derivatives depends upon the use of derivatives and whether the derivatives qualify in whole or in part for the provisions of hedge accounting. The Company had one interest rate swap, which has been determined to be a cash flow hedge that expired in 2016 and was not renewed. The fair value of cash-flow hedging instruments (“Cash Flow Hedge”) are recorded in either other assets or other liabilities. On an ongoing basis, the statement of condition is adjusted to reflect the then current fair value of the Cash Flow Hedge. The related gains or losses are reported in other comprehensive income (loss) and are subsequently reclassified into earnings, as a yield adjustment in the same period in which the related interest on the hedged item (primarily a variable-rate debt obligation) affects earnings. To the extent that the Cash Flow Hedge is not effective, the ineffective portion of the Cash Flow Hedge is immediately recognized as interest expense. As a hedge against rising short-term interest rates, the Company sold a series of U.S. Treasury securities in the amount of $40 million during 2017. The Company was in controlling possession of, but did not own, the securities which had been received as collateral, under industry-standard repurchase agreements, for a corresponding series of 30-day loans of approximately $40 million on each occurrence to an unrelated third party at market rates of interest. The sale of these securities provided the funds necessary to advance the loan to the third party and placed the Company in what is generally described as a “short position” with respect to the sold U.S. Treasury securities. This transaction acted as a hedge against rising short-term interest rates because the price of the sold securities would be expected to decline in a rising short-term interest rate environment and could be subsequently re-acquired at the conclusion of the 30-day loan period at a price lower than the price at which it was originally sold. Short-term rates generally rose during the successive 30-day loan periods and, consequently, the Company recognized gains on the sale of those securities in the amount of $428,000 when the Treasury securities were repurchased. In 2016 the Company sold a U.S. Treasury security in the amount of $25 million which had been received as collateral, under an industry-standard repurchase agreement, for a 30-day loan of approximately $25 million to an unrelated third party, at no interest. The sale of this security provided the funds necessary to advance the loan to the third party and placed the Company in what is generally described as a “short position” with respect to the sold U.S. Treasury securities. Short-term rates rose during the 30-day loan periods and, consequently, the Company recognized a gain on the sale of the security in the amount of $85,000. The hedge positions were closed on December 31, 2017 and 2016. Income Taxes Provisions for income taxes are based on taxes currently payable or refundable and deferred income taxes on temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements. Deferred tax assets and liabilities are reported in the consolidated financial statements at currently enacted income tax rates applicable to the period in which the deferred tax assets and liabilities are expected to be realized or settled. On December 22, 2017 the Tax Act was signed into law. The Tax Act instituted significant changes to various sections of the Internal Revenue Code that effects the Company. Most notably, the Tax Act reduces the Company’s marginal federal income tax rate from 34% to 21% starting January 1, 2018. Generally Accepted Accounting Principles (“GAAP”) requires that the impact of the provisions of the Tax Act be accounted for in the period of enactment. Accordingly, the Company recorded an income tax benefit in the fourth quarter of 2017 related to the Tax Act in the amount of $155,000. The reduction in income tax expense was largely attributable to the reduction in the value of net deferred tax assets and liabilities reflecting lower future tax obligations resulting from the Tax Act’s enacted lower federal corporate tax rate. Earnings Per Share Basic earnings per common share are computed by dividing net income, after preferred stock dividends and preferred stock discount accretion, by the weighted average number of common shares outstanding throughout each year. Diluted earnings per share gives effect to weighted average shares that would be outstanding assuming the exercise of issued stock options using the treasury stock method. Unallocated shares of the Company’s ESOP plan are not included when computing earnings per share until they are committed to be released. Segment Reporting The Company has evaluated the activities relating to its strategic business units. The controlling interest in the FitzGibbons Agency is dissimilar in nature and management when compared to the Company’s other strategic business units which are judged to be similar in nature and management. The Company has determined that the FitzGibbons Agency is below the reporting threshold in size in accordance with Accounting Standards Codification 280. Accordingly, the Company has determined it has no reportable segments. Comprehensive Income (Loss) Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities are reported as a separate component of the equity section of the statement of condition, such items, along with net income, are components of comprehensive income. Accumulated other comprehensive loss represents the sum of these items, with the exception of net income, as of the balance sheet date and is represented in the table below. As of December 31, Accumulated Other Comprehensive Loss By Component: 2017 2016 Unrealized loss for pension and other postretirement obligations $ (3,003 ) $ (2,520 ) Tax effect 783 1,007 Net unrealized loss for pension and other postretirement obligations (2,220 ) (1,513 ) Unrealized loss on available-for-sale securities (2,108 ) (3,072 ) Tax effect 550 1,227 Net unrealized loss on available-for-sale securities (1,558 ) (1,845 ) Unrealized loss on securities transferred to held-to-maturity (585 ) (774 ) Tax effect 155 310 Net unrealized loss on securities transferred to held-to-maturity (430 ) (464 ) Accumulated other comprehensive loss $ (4,208 ) $ (3,822 ) (1) Reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the newly enacted Federal corporate income tax rate reduction from 34% to 21%. Reclassifications Certain amounts in the 2016 consolidated financial statements have been reclassified to conform to the current year presentation. These reclassifications had no effect on net income as previously reported.

New Accounting Pronouncements

New Accounting Pronouncements	12 Months Ended
	Dec. 31, 2017
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
NEW ACCOUNTING PRONOUNCEMENTS	NOTE 2: NEW ACCOUNTING PRONOUNCEMENTS The following Table provides a description of accounting standards that were adopted in 2017 as well as standards that are currently effective but could have an impact on the Company's consolidated financial statements upon adoption. Standard Description Required Date of Implementation Effect on Consolidated Financial Statements Standards Adopted in 2017 Improvements to Employee Share-Based Payment Accounting ( ASU 2016-09: Compensation—Stock Compensation [Topic 718]: Improvements to Employee Share-Based Payment Accounting The amended guidance requires that all excess tax benefits and tax deficiencies related to share-based compensation be recognized in income tax expense in the income statement and that such amounts be recognized in the period in which the tax deduction arises or in the period in which an expiration of an award occurs. January 1, 2017 The adoption of this guidance resulted in a $37,000 reduction of income tax expense for the year ended December 31, 2017 that under previous accounting guidance would have been recognized directly in shareholders’ equity. Simplifying the Transition to Equity Method of Accounting ( ASU 2016-07: Investments—Equity Method and Joint Ventures [Topic 323]: Simplifying the Transition to the Equity Method of Accounting The amended guidance eliminates the requirement that an investor retroactively apply the equity method of accounting as a result of an increase in the level of ownership interest or degree of influence. The amended guidance instead requires the investor to adopt the equity method of accounting as of the date the investment first qualifies for such accounting. January 1, 2017 The adoption of this guidance did not have a material effect on the Company’s consolidated financial position or results of operations. Derivatives and Hedging Amendments (ASU 2016-05: Derivatives and Hedging [Topic 815]: Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships One amendment clarifies that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. A second amendment clarifies the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. January 1, 2017 The adoption of this guidance did not have a material effect on the Company’s consolidated financial position or results of operations. Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ( ASU 2018-02: Income Statement—Reporting Comprehensive Income [Topic 220]: Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income) The amended guidance allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the newly enacted federal corporate income tax rate. The amount of reclassification would be the difference between the historical corporate income tax and the new enacted 21 percent corporate income tax rate. January 1, 2018 (Early adoption permitted) The Company early adopted the amended guidance following enactment of the Tax Act in 2017. The adoption of this guidance resulted in a $790,000 reclassification from AOCI to retained earnings. Standard Description Required Date of Implementation Effect on Consolidated Financial Statements Standards Not Yet Adopted as of December 31, 2017 Revenue from Contracts with Customers ( ASU 2014-09: Revenue from Contracts with Customers [Topic 606] The core principle of the accounting guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. January 1, 2018 The Company adopted the revenue recognition guidance effective January 1, 2018, and expects to apply the modified retrospective approach for reporting purposes. A significant amount of the Company’s revenues are derived from net interest income on financial assets and liabilities, which are excluded from the scope of the amended guidance. With respect to noninterest income, under the new guidance credit card interchange revenue will be presented net of rewards expense in other revenues from operations. For the years ended December 31, 2017 and 2016, The Company recognized $94,000 and $111,000, respectively, of credit card rewards expense in other costs of operations. The adjustment to beginning retained earnings as well as the impact of any changes in the timing of revenue recognition of noninterest income items within the scope of this guidance will not be material to the Company’s financial position or results of operations. Recognition and Measurement of Financial Assets and Financial Liabilities ( ASU 2016-01: Financial Instruments—Overall [Subtopic 825-10]: Recognition and Measurement of Financial Assets and Financial Liabilities The amended guidance requires equity investments (excluding those accounted for under the equity method of accounting or those that result in consolidation of the investee) be measured at fair value with changes in fair value recognized in net income, public entities to use the exit price when measuring the fair value of financial instruments for disclosure purposes, and an entity to present separately in other comprehensive income a change in the instrument-specific credit risk when the entity has elected to measure a liability at fair value in accordance with the fair value option. January 1, 2018 The Company held marketable equity securities with a fair value of $515,000 in its available-for-sale portfolio at December 31, 2017. Effective January 1, 2018, fair value changes in such equity securities will be recognized in the consolidated statement of income as opposed to AOCI where they had been recognized under previous accounting guidance. Although those securities have historically fluctuated in value, how those securities could change in value in the future is not predictable. Improvements to Accounting for Hedging Activities ( ASU 2017-12: Derivatives and Hedging [Topic 815]: Targeted Improvements to Accounting for Hedging Activities The amended guidance expands and clarifies hedge accounting for nonfinancial and financial risk components, aligns the recognition and presentation of the effects of the hedging instrument and hedged item in the financial statements, and simplifies the requirements for assessing effectiveness in a hedging relationship. January 1, 2019 (Early adoption permitted) The Company adopted the amended guidance on January 1, 2018 and does not expect such adoption will have a material impact on its consolidated financial statements. Standard Description Required Date of Implementation Effect on Consolidated Financial Statements Standards Not Yet Adopted as of December 31, 2017 Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost ( ASU 2017-07: Compensation — Retirement Benefits [Topic 715] Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost The amended guidance requires the service cost component of the net periodic pension cost and net periodic postretirement benefit cost to be reported in the same line item in the income statement as other compensation costs arising from services rendered by the pertinent employees during the period. The amendments also require that the other components of net benefit costs be presented separately from the service cost component. January 1, 2018 The Company adopted the new reporting requirements effective January 1, 2018. The Company has previously reported all of its net periodic pension and postretirement benefit costs in salaries and employee benefits within the consolidated statement of income. Information about net periodic pension and postretirement benefit costs that were not service cost-related is included in Note 14. Scope of Modification Accounting for Share-Based Payment Awards ( ASU 2016-09: Compensation — Stock Compensation [Topic 718]: Improvements to Employee Share-Based Payment Accounting The amended guidance addresses which changes to the terms and conditions of a share-based payment award require an entity to apply modification accounting. January 1, 2018 The Company adopted the amended guidance on January 1, 2018. The guidance is to be applied on a prospective basis for awards modified on or after the adoption date. Restricted Cash ( ASU 2016-18: Statements of Cash Flows [Topic 230]: Restricted Cash The amended guidance requires that restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. In addition, when cash, cash equivalents, and restricted cash or restricted cash equivalents are presented in more than one line item within the statement of financial position, the line items and amounts must be presented on the face of the statement of cash flows or disclosed in the notes to the financial statements. Information about the nature of restrictions on an entity’s cash and cash equivalents must also be disclosed. January 1, 2018 The guidance will be applied using a retrospective transition method beginning with first quarter 2018 reporting. Classification of Certain Cash Receipts and Cash Payments ( ASU 2016-15: Statement of Cash Flows [Topic 230]: Classification of Certain Cash Receipts and Cash Payments This amendment provides clarifying guidance for classifying cash inflows or outflows on the statement of cash flows where current guidance is unclear or silent. January 1, 2018 The guidance will be applied using a retrospective transition method beginning with first quarter 2018 reporting. Clarifying the Definition of a Business ( ASU 2017-01: Business Combinations [Topic 805]: Clarifying the Definition of a Business The amended guidance clarifies the definition of a business for purposes of evaluating whether transactions would be accounted for as acquisitions (or disposals) of assets or businesses. January 1, 2018 The guidance should be applied using a prospective transition method. The Company does not expect the guidance to have a material impact on its consolidated financial statements. Standard Description Required Date of Implementation Effect on Consolidated Financial Statements Standards Not Yet Adopted as of December 31, 2017 Leases ( ASU 2016-02: Leases [Topic 842] The new guidance requires lessees to record a right-of-use asset and a lease liability for all leases with a term greater than 12 months. While the guidance requires all leases to be recognized in the balance sheet, there continues to be a differentiation between finance leases and operating leases for purposes of income statement recognition and cash flow statement presentation. For finance leases, interest on the lease liability and amortization of the right-of-use asset will be recognized separately in the statement of income. Repayments of principal on those lease liabilities will be classified within financing activities and payments of interest on the lease liability will be classified within operating activities in the statement of cash flows. For operating leases, a single lease cost is recognized in the statement of income and allocated over the lease term, generally on a straight-line basis. All cash payments are presented within operating activities in the statement of cash flows. The accounting applied by lessors is largely unchanged from existing GAAP, however, the guidance eliminates the accounting model for leveraged leases for leases that commence after the effective date of the guidance. January 1, 2019 (Early adoption permitted) The Company occupies certain banking offices and uses certain equipment under noncancelable operating lease agreements which currently are not reflected in its consolidated balance sheet. Upon adoption of the guidance, the Company expects to report increased assets and increased liabilities as a result of recognizing right-of-use assets and lease liabilities on its consolidated balance sheet. The Company was committed to $1.1 million of minimum lease payments under noncancelable operating lease agreements at December 31, 2017. The Company does not expect the new guidance will have a material impact to its consolidated statement of income. Premium Amortization on Purchased Callable Debt Securities ( ASU 2017-08: Receivables—Nonrefundable Fees and Other Costs [Subtopic 310-20]: Premium Amortization on Purchased Callable Debt Securities The amended guidance requires the premium on callable debt securities to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. January 1, 2019 (Early adoption permitted) The amendments should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company does not expect the guidance to have a material impact on its consolidated financial statements. Standard Description Required Date of Implementation Effect on Consolidated Financial Statements Standards Not Yet Adopted as of December 31, 2017 Measurement of Credit Losses on Financial Instruments ( ASU 2016-13: Financial Instruments—Credit Losses [Topic 326]: Measurement of Credit Losses on Financial Instruments The amended guidance replaces the current incurred loss model for determining the allowance for credit losses. The guidance requires financial assets measured at amortized cost to be presented at the net amount expected to be collected. The allowance for credit losses will represent a valuation account that is deducted from the amortized cost basis of the financial assets to present their net carrying value at the amount expected to be collected. The income statement will reflect the measurement of credit losses for newly recognized financial assets as well as expected increases or decreases of expected credit losses that have taken place during the period. When determining the allowance, expected credit losses over the contractual term of the financial asset(s) (taking into account prepayments) will be estimated considering relevant information about past events, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The amended guidance also requires recording an allowance for credit losses for purchased financial assets with a more-than-insignificant amount of credit deterioration since origination. The initial allowance for these assets will be added to the purchase price at acquisition rather than being reported as an expense. Subsequent changes in the allowance will be recorded through the income statement as an expense adjustment. In addition, the amended guidance requires credit losses relating to available-for-sale debt securities to be recorded through an allowance for credit losses. The calculation of credit losses for available-for-sale securities will be similar to how it is determined under existing guidance. January 1, 2020 (Early adoption permitted as of January 1, 2019) The Company is assessing the new guidance to determine what modifications to existing credit estimation processes may be required. The Company expects that the new guidance will result in an increase in its allowance for credit losses as a result of considering credit losses over the expected life of its loan and debt securities portfolios. Increases in the level of allowances will also reflect new requirements to include estimated credit losses on investment securities classified as held-to-maturity, if any. The Company has formed an Implementation Committee, whose membership includes representatives of senior management, to develop plans that will encompass: (1) internal methodology changes (2) data collection and management activities, (3) internal communication requirements, and (4) estimation of the projected impact of this guidance. The amount of any change in the allowance for credit losses resulting from the new guidance will ultimately be impacted by the provisions of this guidance as well as by the loan and debt security portfolios composition and asset quality at the adoption date, and economic conditions and forecasts at the time of adoption. Simplifying the Test for Goodwill Impairment ( ASU 2017-04: Intangibles—Goodwill and Other [Topic 350]: Simplifying the Test for Goodwill Impairment The amended guidance eliminates Step 2 from the goodwill impairment test. January 1, 2020 (Early adoption permitted) The amendments should be applied using a prospective transition method. The Company does not expect the guidance will have a material impact on its consolidated financial statements, unless at some point in the future one of its reporting units were to fail Step 1 of the goodwill impairment test. Standard Description Required Date of Implementation Effect on Consolidated Financial Statements Standards Not Yet Adopted as of December 31, 2017 Share-based Payment Awards ( ASU 2017-11: Earnings per Share [Topic 260] The amended guidance clarifies which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in FASB Topic 18. An entity should account for the effects of a modification unless specific criteria regarding fair value, vesting condition, and classification are met. The current disclosure requirements in FASB Topic 18 apply regardless of whether an entity is required to apply modification accounting under the amendments in this guidance. January 1, 2018 The guidance will be applied using a prospective transition method. The Company does not expect the guidance to have a material impact on its consolidated financial statements.

Earnings per Share

Earnings per Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
EARNINGS PER SHARE	NOTE 3: EARNINGS PER SHARE Basic earnings per share are calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Net income available to common shareholders is net income to Pathfinder Bancorp, Inc. less the total of preferred dividends declared. Diluted earnings per share include the potential dilutive effect that could occur upon the assumed exercise of issued stock options using the Treasury Stock method. Anti-dilutive shares are common stock equivalents with average exercise prices in excess of the weighted average market price for the period presented. Anti-dilutive stock options, not included in the computation below, were 23,065 and 214,415 for the years ended 2017 and 2016, respectively. Unallocated common shares held by the ESOP are not included in the weighted-average number of common shares outstanding for purposes of calculating earnings per common share until they are committed to be released to plan participants. The following table sets forth the calculation of basic and diluted earnings per share. Years ended December 31, (In thousands, except per share data) 2017 2016 Basic Earnings Per Common Share Net income available to common shareholders $ 3,491 $ 3,256 Weighted average common shares outstanding 4,081 4,105 Basic earnings per common share $ 0.86 $ 0.79 Diluted Earnings Per Common Share Net income available to common shareholders $ 3,491 $ 3,256 Weighted average common shares outstanding 4,081 4,105 Effect of assumed exercise of stock options 108 85 Diluted weighted average common shares outstanding 4,189 4,190 Diluted earnings per common share $ 0.83 $ 0.78

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2017
Investments Debt And Equity Securities [Abstract]
INVESTMENT SECURITIES	NOTE 4: INVESTMENT SECURITIES The amortized cost and estimated fair value of investment securities are summarized as follows: December 31, 2017 Gross Gross Estimated Amortized Unrealized Unrealized Fair (In thousands) Cost Gains Losses Value Available-for-Sale Portfolio Debt investment securities: US Treasury, agencies and GSEs $ 41,489 $ 1 $ (154 ) $ 41,336 State and political subdivisions 13,960 12 (291 ) 13,681 Corporate 8,584 108 (92 ) 8,600 Asset backed securities 6,662 12 (30 ) 6,644 Residential mortgage-backed - US agency 36,214 23 (495 ) 35,742 Collateralized mortgage obligations - US agency 54,481 - (1,133 ) 53,348 Collateralized mortgage obligations - Private label 11,193 62 (203 ) 11,052 Total 172,583 218 (2,398 ) 170,403 Equity investment securities: Common stock - financial services industry 663 72 - 735 Total 663 72 - 735 Total available-for-sale $ 173,246 $ 290 $ (2,398 ) $ 171,138 Held-to-Maturity Portfolio Debt investment securities: US Treasury, agencies and GSEs $ 4,948 $ 14 $ (14 ) $ 4,948 State and political subdivisions 35,130 641 (311 ) 35,460 Corporate 8,311 151 (159 ) 8,303 Residential mortgage-backed - US agency 6,853 53 (10 ) 6,896 Collateralized mortgage obligations - US agency 7,574 83 (215 ) 7,442 Collateralized mortgage obligations - Private label 3,380 7 (10 ) 3,377 Total held-to-maturity $ 66,196 $ 949 $ (719 ) $ 66,426 December 31, 2016 Gross Gross Estimated Amortized Unrealized Unrealized Fair (In thousands) Cost Gains Losses Value Available-for-Sale Portfolio Debt investment securities: US Treasury, agencies and GSEs $ 24,263 $ 1 $ (80 ) $ 24,184 State and political subdivisions 17,185 33 (737 ) 16,481 Corporate 15,560 20 (385 ) 15,195 Asset backed securities 6,696 5 (37 ) 6,664 Residential mortgage-backed - US agency 31,204 - (638 ) 30,566 Collateralized mortgage obligations - US agency 42,124 45 (1,183 ) 40,986 Collateralized mortgage obligations - Private label 6,682 - (105 ) 6,577 Total 143,714 104 (3,165 ) 140,653 Equity investment securities: Mutual funds: Ultra short mortgage fund 643 - (17 ) 626 Common stock - financial services industry 663 13 - 676 Total 1,306 13 (17 ) 1,302 Total available-for-sale $ 145,020 $ 117 $ (3,182 ) $ 141,955 Held-to-Maturity Portfolio Debt investment securities: US Treasury, agencies and GSEs $ 4,928 $ 30 $ (18 ) $ 4,940 State and political subdivisions 30,697 572 (693 ) 30,576 Corporate 8,240 85 (228 ) 8,097 Residential mortgage-backed - US agency 6,386 31 (20 ) 6,397 Collateralized mortgage obligations - US agency 2,927 96 - 3,023 Collateralized mortgage obligations - Private label 1,467 - (71 ) 1,396 Total held-to-maturity $ 54,645 $ 814 $ (1,030 ) $ 54,429 The majority of the Company’s investments in mortgage-backed securities include pass-through securities and collateralized mortgage obligations issued and guaranteed by Fannie Mae, Freddie Mac, and Ginnie Mae. At December 31, 2017, the Company also held a total of seventeen private-label mortgage-backed securities or collateralized mortgage obligations with an aggregate book balance of $25.2 million and six The amortized cost and estimated fair value of debt investments at December 31, 2017 by contractual maturity are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties. Available-for-Sale Held-to-Maturity Amortized Estimated Amortized Estimated (In thousands) Cost Fair Value Cost Fair Value Due in one year or less $ 21,555 $ 21,506 $ 1,680 $ 1,680 Due after one year through five years 28,957 28,830 11,381 11,488 Due after five years through ten years 11,587 11,642 16,993 17,479 Due after ten years 8,596 8,283 18,335 18,064 Sub-total 70,695 70,261 48,389 48,711 Residential mortgage-backed - US agency 36,214 35,742 6,853 6,896 Collateralized mortgage obligations - US agency 54,481 53,348 7,574 7,442 Collateralized mortgage obligations - Private label 11,193 11,052 3,380 3,377 Totals $ 172,583 $ 170,403 $ 66,196 $ 66,426 The Company’s investment securities’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, is as follows: December 31, 2017 Less than Twelve Months Twelve Months or More Total Number of Number of Number of Individual Unrealized Fair Individual Unrealized Fair Individual Unrealized Fair (Dollars in thousands) Securities Losses Value Securities Losses Value Securities Losses Value Available-for-Sale Portfolio US Treasury, agencies and GSE's 5 $ (105 ) $ 27,359 4 $ (49 ) $ 13,957 9 $ (154 ) $ 41,316 State and political subdivisions 18 (24 ) 2,480 12 (267 ) 5,041 30 (291 ) 7,521 Corporate 2 (19 ) 1,791 1 (73 ) 1,727 3 (92 ) 3,518 Asset backed securities 2 (17 ) 3,123 1 (13 ) 742 3 (30 ) 3,865 Residential mortgage-backed - US agency 15 (159 ) 21,551 9 (336 ) 10,463 24 (495 ) 32,014 Collateralized mortgage obligations - US agency 14 (195 ) 23,790 21 (938 ) 25,395 35 (1,133 ) 49,185 Collateralized mortgage obligations - Private label 4 (203 ) 7,439 - - - 4 (203 ) 7,439 Totals 60 $ (722 ) $ 87,533 48 $ (1,676 ) $ 57,325 108 $ (2,398 ) $ 144,858 Held-to-Maturity Portfolio US Treasury, agencies and GSE's 2 $ (2 ) $ 1,990 1 $ (12 ) $ 988 3 $ (14 ) $ 2,978 State and political subdivisions 8 (55 ) 5,668 11 (256 ) 8,644 19 (311 ) 14,312 Corporate 3 (10 ) 1,412 1 (149 ) 2,087 4 (159 ) 3,499 Residential mortgage-backed - US agency 2 (10 ) 1,909 - - - 2 (10 ) 1,909 Collateralized mortgage obligations - US agency 2 (215 ) 4,418 - - - 2 (215 ) 4,418 Collateralized mortgage obligations - Private label 1 (10 ) 1,119 - - - 1 (10 ) 1,119 Totals 18 $ (302 ) $ 16,516 13 $ (417 ) $ 11,719 31 $ (719 ) $ 28,235 December 31, 2016 Less than Twelve Months Twelve Months or More Total Number of Number of Number of Individual Unrealized Fair Individual Unrealized Fair Individual Unrealized Fair (Dollars in thousands) Securities Losses Value Securities Losses Value Securities Losses Value Available-for-Sale Portfolio US Treasury, agencies and GSE's 6 $ (80 ) $ 22,161 - $ - $ - 6 $ (80 ) $ 22,161 State and political subdivisions 53 (737 ) 14,057 - - - 53 (737 ) 14,057 Corporate 10 (385 ) 10,587 - - - 10 (385 ) 10,587 Asset backed securities 3 (37 ) 4,455 - - - 3 (37 ) 4,455 Equity and other investments 1 (17 ) 626 - - - 1 (17 ) 626 Residential mortgage-backed - US agency 23 (638 ) 29,849 - - - 23 (638 ) 29,849 Collateralized mortgage obligations - US agency 28 (1,087 ) 33,376 4 (96 ) 2,514 32 (1,183 ) 35,890 Collateralized mortgage obligations - Private label 5 (105 ) 6,577 - - - 5 (105 ) 6,577 Totals 129 $ (3,086 ) $ 121,688 4 $ (96 ) $ 2,514 133 $ (3,182 ) $ 124,202 Held-to-Maturity Portfolio US Treasury, agencies and GSE's 1 $ (18 ) $ 982 - $ - $ - 1 $ (18 ) $ 982 State and political subdivisions 16 (693 ) 10,038 - - - 16 (693 ) 10,038 Corporate 5 (228 ) 4,402 - - - 5 (228 ) 4,402 Residential mortgage-backed - US agency 3 (20 ) 1,869 - - - 3 (20 ) 1,869 Collateralized mortgage obligations - Private label 1 (71 ) 1,396 - - - 1 (71 ) 1,396 Totals 26 $ (1,030 ) $ 18,687 - $ - $ - 26 $ (1,030 ) $ 18,687 The Company conducts a formal review of investment securities on a quarterly basis for the presence of other-than-temporary impairment (“OTTI”). The Company assesses whether OTTI is present when the fair value of a debt security is less than its amortized cost basis at the statement of condition date. Under these circumstances, OTTI is considered to have occurred (1) if we intend to sell the security; (2) if it is “more likely than not” we will be required to sell the security before recovery of its amortized cost basis; or (3) the present value of expected cash flows is not anticipated to be sufficient to recover the entire amortized cost basis. The guidance requires that credit-related OTTI is recognized in earnings while non-credit-related OTTI on securities not expected to be sold is recognized in other comprehensive income (“OCI”). Non-credit-related OTTI is based on other factors, including illiquidity and changes in the general interest rate environment. Presentation of OTTI is made in the consolidated statement of income on a gross basis, including both the portion recognized in earnings as well as the portion recorded in OCI. The gross OTTI would then be offset by the amount of non-credit-related OTTI, showing the net as the impact on earnings. Management does not believe any individual unrealized loss in other securities within the portfolio as of December 31, 2017 represents OTTI. All securities which have been in an unrealized loss position for 12 months or more are issued by United States agencies or government sponsored enterprises and consist of mortgage-backed securities, collateralized mortgage obligations and direct agency financings. These positions in US government agency and government-sponsored enterprises are deemed to have no credit impairment, thus, the disclosed unrealized losses relate directly to changes in interest rates subsequent to the acquisition of the individual securities. The Company does not intend to sell these securities, nor is it more likely than not that the Company will be required to sell these securities prior to the recovery of the amortized cost. In determining whether OTTI has occurred for equity securities, the Company considers the applicable factors described above and the length of time the equity security’s fair value has been below the carrying amount. At December 31, 2016, the Company had one mutual fund investment, categorized as an equity security, with a fair value below its book value. This security, which was sold in 2017, at a realized loss $19,000, represented an ownership interest in a mutual fund primarily invested in adjustable-rate mortgage securities. Proceeds of $67.6 million and $33.2 million, respectively on sales and redemptions of securities for the years ended December 31 resulted in gross realized gains (losses) detailed below: (In thousands) 2017 2016 Realized gains on investments $ 427 $ 526 Realized gains on hedging activity 428 85 Realized losses on investments (366 ) (17 ) $ 489 $ 594 As of December 31, 2017 and December 31, 2016, securities with a fair value of $113.0 million and $96.4 million, respectively, were pledged to collateralize certain municipal deposit relationships. As of the same dates, securities with a fair value of $19.9 million and $12.9 million were pledged against certain borrowing arrangements. Management has reviewed its loan and mortgage-backed securities portfolios and determined that, to the best of its knowledge, little or no exposure exists to sub-prime or other high-risk residential mortgages. The Company is not in the practice of investing in, or originating, these types of investments or loans.

Loans

Loans	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
LOANS	NOTE 5: LOANS Major classifications of loans are as follows: December 31, December 31, (In thousands) 2017 2016 Residential mortgage loans: 1-4 family first-lien residential mortgages $ 216,793 $ 199,000 Construction 5,558 8,505 Total residential mortgage loans 222,351 207,505 Commercial loans: Real estate 192,525 150,698 Lines of credit 51,131 50,477 Other commercial and industrial 50,251 40,394 Tax exempt loans 10,405 12,523 Total commercial loans 304,312 254,092 Consumer loans: Home equity and junior liens 25,935 24,722 Other consumer 28,646 6,293 Total consumer loans 54,581 31,015 Total loans 581,244 492,612 Net deferred loan fees (413 ) (465 ) Less allowance for loan losses (7,126 ) (6,247 ) Loans receivable, net $ 573,705 $ 485,900 The Company originates residential mortgage, commercial and consumer loans largely to customers throughout Oswego, Onondaga and surrounding counties. Although the Company has a diversified loan portfolio, a substantial portion of its borrowers’ abilities to honor their contracts is dependent upon the counties’ employment and economic conditions. Although the Bank may occasionally purchase or fund loan participation interests outside of its primary market areas, the Bank generally originates residential mortgage, commercial, and consumer loans largely to customers throughout Oswego and Onondaga counties. Although the Bank has a diversified loan portfolio, a substantial portion of its borrowers’ abilities to honor their loan contracts is dependent upon the counties’ employment and economic conditions. The Bank acquired $15.6 million and $10.2 million of loans originated by an unrelated financial institution, located outside of the Bank’s market area, in January 2017 and April 2017, respectively. The acquired loan pools represented a 90% participating interest in a total of 1,231 loans secured by liens on automobiles with maturities ranging primarily from two to six years. These loans will be serviced through their respective maturities by the originating financial institution. At December 31, 2017 there were 1,082 loans outstanding with a remaining outstanding carrying value of $19.6 million. Since the acquisition of these loan pools, a total of two loans, with a combined outstanding balance of $44,800, have been charged-off as uncollectible. As of December 31, 2017 and December 31, 2016, residential mortgage loans with a carrying value of $148.1 million and $140.3 million, respectively, have been pledged by the Company to the Federal Home Loan Bank of New York (“FHLBNY”) under a blanket collateral agreement to secure the Company’s line of credit and term borrowings. Loan Origination / Risk Management The Company has lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. Management and the board of directors reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by frequently providing management with reports related to loan production, loan quality, loan delinquencies, nonperforming and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions. Risk Characteristics of Portfolio Segments Each portfolio segment generally carries its own unique risk characteristics. The residential mortgage loan segment is impacted by general economic conditions, unemployment rates in the Bank’s service area, real estate values and the forward expectation of improvement or deterioration in economic conditions. The commercial loan segment is impacted by general economic conditions but, more specifically, the industry segment in which each borrower participates. Unique competitive changes within a borrower’s specific industry, or geographic location could cause significant changes in the borrower’s revenue stream, and therefore, impact its ability to repay its obligations. Commercial real estate is also subject to general economic conditions but changes within this segment typically lag changes seen within the consumer and commercial segment. Included within this portfolio are both owner occupied real estate, in which the borrower occupies the majority of the real estate property and upon which the majority of the sources of repayment of the obligation is dependent upon, and non-owner occupied real estate, in which several tenants comprise the repayment source for this portfolio segment. The composition and competitive position of the tenant structure may cause adverse changes in the repayment of debt obligations for the non-owner occupied class within this segment. The consumer loan segment is impacted by general economic conditions, unemployment rates in the geographic areas in which borrowers and loan collateral are located, and the forward expectation of improvement or deterioration in economic conditions. Real estate loans, including residential mortgages, commercial real estate loans and home equity, comprise 76% of the portfolio in 2017, substantially identical to the composition in 2016, where such loans represented 78% of total loans. Loans secured by real estate generally provide strong collateral protection and thus significantly reduce the inherent credit risk in the portfolio. Management has reviewed its loan portfolio and determined that, to the best of its knowledge, little or no exposure exists to sub-prime or other high-risk residential mortgages. The Company is not in the practice of originating these types of loans. Description of Credit Quality Indicators The Company utilizes an eight tier risk rating system to evaluate the quality of its loan portfolio. Loans that are risk rated “1” through “4” are considered “Pass” loans. In accordance with regulatory guidelines, loans rated “5” through “8” are termed “criticized” loans and loans rated “6” through “8” are termed “classified” loans. A description of the Company’s credit quality indicators follows. For Commercial Loans: 1. Prime 2. Strong 3. Satisfactory 4. Satisfactory Watch: 5. Special Mention 6. Substandard 7. Doubtful 8. Loss For Residential Mortgage and Consumer Loans: Residential mortgage and consumer loans are assigned a “Pass” rating unless the loan has demonstrated signs of weakness as indicated by the ratings below. 5. Special Mention 6. Substandard 7. Doubtful The risk ratings for classified loans are evaluated at least quarterly for commercial loans or when credit deficiencies arise, such as delinquent loan payments, for commercial, residential mortgage or consumer loans. See further discussion of risk ratings in Note 1. The following table presents the segments and classes of the loan portfolio summarized by the aggregate pass rating and the criticized and classified ratings of special mention, substandard and doubtful within the Company's internal risk rating system: As of December 31, 2017 Special (In thousands) Pass Mention Substandard Doubtful Total Residential mortgage loans: 1-4 family first-lien residential mortgages $ 211,825 $ 891 $ 1,869 $ 2,208 $ 216,793 Construction 5,558 - - 5,558 Total residential mortgage loans 217,383 891 1,869 2,208 222,351 Commercial loans: Real estate 187,073 1,372 2,024 2,056 192,525 Lines of credit 50,353 195 523 60 51,131 Other commercial and industrial 48,892 407 532 420 50,251 Tax exempt loans 10,405 - - - 10,405 Total commercial loans 296,723 1,974 3,079 2,536 304,312 Consumer loans: Home equity and junior liens 25,396 61 304 174 25,935 Other consumer 28,584 55 7 - 28,646 Total consumer loans 53,980 116 311 174 54,581 Total loans $ 568,086 $ 2,981 $ 5,259 $ 4,918 $ 581,244 As of December 31, 2016 Special (In thousands) Pass Mention Substandard Doubtful Total Residential mortgage loans: 1-4 family first-lien residential mortgages $ 194,377 $ 1,445 $ 2,115 $ 1,063 $ 199,000 Construction 8,505 - - - 8,505 Total residential mortgage loans 202,882 1,445 2,115 1,063 207,505 Commercial loans: Real estate 143,126 3,714 3,858 - 150,698 Lines of credit 49,393 684 400 - 50,477 Other commercial and industrial 39,027 661 702 4 40,394 Tax exempt loans 12,523 - - - 12,523 Total commercial loans 244,069 5,059 4,960 4 254,092 Consumer loans: Home equity and junior liens 23,963 170 389 200 24,722 Other consumer 6,224 17 8 44 6,293 Total consumer loans 30,187 187 397 244 31,015 Total loans $ 477,138 $ 6,691 $ 7,472 $ 1,311 $ 492,612 Nonaccrual and Past Due Loans Loans are considered past due if the required principal and interest payments have not been received within thirty days of the payment due date. An age analysis of past due loans, exclusive of deferred costs, segregated by class of loans were as follows: As of December 31, 2017 30-59 Days 60-89 Days 90 Days Past Due Past Due and Total Total Loans (In thousands) and Accruing and Accruing Over Past Due Current Receivable Residential mortgage loans: 1-4 family first-lien residential mortgages $ 1,196 $ 925 $ 2,088 $ 4,209 $ 212,584 $ 216,793 Construction - - - - 5,558 5,558 Total residential mortgage loans 1,196 925 2,088 4,209 218,142 222,351 Commercial loans: Real estate 720 2,056 1,545 4,321 188,204 192,525 Lines of credit 1,482 31 132 1,645 49,486 51,131 Other commercial and industrial 575 60 766 1,401 48,850 50,251 Tax exempt loans - - - - 10,405 10,405 Total commercial loans 2,777 2,147 2,443 7,367 296,945 304,312 Consumer loans: Home equity and junior liens 94 74 300 468 25,467 25,935 Other consumer 192 50 63 305 28,341 28,646 Total consumer loans 286 124 363 773 53,808 54,581 Total loans $ 4,259 $ 3,196 $ 4,894 $ 12,349 $ 568,895 $ 581,244 As of December 31, 2016 30-59 Days 60-89 Days 90 Days Past Due Past Due and Total Total Loans (In thousands) and Accruing and Accruing Over Past Due Current Receivable Residential mortgage loans: 1-4 family first-lien residential mortgages $ 1,247 $ 832 $ 2,560 $ 4,639 $ 194,361 $ 199,000 Construction - - - - 8,505 8,505 Total residential mortgage loans 1,247 832 2,560 4,639 202,866 207,505 Commercial loans: Real estate 1,063 375 1,223 2,661 148,037 150,698 Lines of credit 819 - - 819 49,658 50,477 Other commercial and industrial 333 - 640 973 39,421 40,394 Tax exempt loans - - - - 12,523 12,523 Total commercial loans 2,215 375 1,863 4,453 249,639 254,092 Consumer loans: Home equity and junior liens 105 157 338 600 24,122 24,722 Other consumer 8 13 50 71 6,222 6,293 Total consumer loans 113 170 388 671 30,344 31,015 Total loans $ 3,575 $ 1,377 $ 4,811 $ 9,763 $ 482,849 $ 492,612 Year-end nonaccrual loans, segregated by class of loan, were as follows: December 31, December 31, (In thousands) 2017 2016 Residential mortgage loans: 1-4 family first-lien residential mortgages $ 2,088 $ 2,560 2,088 2,560 Commercial loans: Real estate 1,545 1,223 Lines of credit 132 - Other commercial and industrial 766 640 2,443 1,863 Consumer loans: Home equity and junior liens 300 338 Other consumer 63 50 363 388 Total nonaccrual loans $ 4,894 $ 4,811 There were no loans past due ninety days or more and still accruing interest at December 31, 2017 or 2016. The Company is required to disclose certain activities related to Troubled Debt Restructurings (“TDR”) in accordance with accounting guidance. Certain loans have been modified in a TDR where economic concessions have been granted to a borrower who is experiencing, or expected to experience, financial difficulties. These economic concessions could include a reduction in the loan interest rate, extension of payment terms, reduction of principal amortization, or other actions that it would not otherwise consider for a new loan with similar risk characteristics. The Company is required to disclose new TDRs for each reporting period for which an income statement is being presented. Pre-modification outstanding recorded investment is the principal loan balance less the provision for loan losses before the loan was modified as a TDR. Post-modification outstanding recorded investment is the principal balance less the provision for loan losses after the loan was modified as a TDR. Additional provision for loan losses is the change in the allowance for loan losses between the pre-modification outstanding recorded investment and post-modification outstanding recorded investment. The Company had one loan that had been modified as a TDR for the year ended December 31, 2017, which subsequently paid off in the fourth quarter of 2017. Both the pre-modification and post-modification recorded investment in the commercial real estate loan was $2.0 million as a result of economic concessions granted, which included extended interest only payment terms. The Company was not required to increase the specific reserves against this loan during the third quarter of 2017. The table below details loans that had been modified as TDRs for the year ended December 31, 2016. For the year ended December 31, 2016 (In thousands) Number of loans Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Additional provision for loan losses Individually evaluated for impairment: Residential mortgage loans 3 $ 127 $ 135 $ 29 Commercial real estate loans 1 $ 2,088 $ 2,088 $ - The TDRs individually evaluated for impairment have been classified as TDRs due to economic concessions granted, which consisted of additional funds advanced without associated increases in collateral, interest rate reduction, extended term and/or extended interest only payment terms. The Company was required to increase the specific reserves against the loans individually reviewed for impairment by $29,000, which was a component of the provision for loan losses in the fourth quarter of 2016. The Company is required to disclose loans that have been modified as TDRs within the previous 12 months in which there was payment default after the restructuring. The Company defines payment default as any loans 90 days past due on contractual payments. The Company had no loans that had been modified as TDRs during the twelve months prior to December 31, 2017, which had subsequently defaulted during the year ended December 31, 2017. The Company had no loans that had been modified as TDRs during the twelve months prior to December 31, 2016, which had subsequently defaulted during the year ended December 31, 2016. When the Company modifies a loan within a portfolio segment that is individually evaluated for impairment, a potential impairment is analyzed either based on the present value of the expected future cash flows discounted at the interest rate of the original loan terms or the fair value of the collateral less costs to sell. If it is determined that the value of the loan is less than its recorded investment, then impairment is recognized as a component of the provision for loan losses, an associated increase to the allowance for loan losses or as a charge-off to the allowance for loan losses in the current period. Impaired Loans The following table summarizes impaired loans information by portfolio class: December 31, 2017 December 31, 2016 Unpaid Unpaid Recorded Principal Related Recorded Principal Related (In thousands) Investment Balance Allowance Investment Balance Allowance With no related allowance recorded: 1-4 family first-lien residential mortgages $ 900 $ 909 $ - $ 850 $ 857 $ - Commercial real estate 3,314 3,360 - 4,254 4,344 - Commercial lines of credit 507 507 - 400 400 - Other commercial and industrial 523 524 - 470 470 - Home equity and junior liens 80 80 - 140 140 - With an allowance recorded: 1-4 family first-lien residential mortgages 958 958 210 763 763 117 Commercial real estate 2,186 2,187 320 818 872 455 Commercial lines of credit 40 40 40 - - - Other commercial and industrial 525 525 391 552 552 553 Home equity and junior liens 210 210 142 345 345 5 Total: 1-4 family first-lien residential mortgages 1,858 1,867 210 1,613 1,620 117 Commercial real estate 5,500 5,547 320 5,072 5,216 455 Commercial lines of credit 547 547 40 400 400 - Other commercial and industrial 1,048 1,049 391 1,022 1,022 553 Home equity and junior liens 290 290 142 485 485 5 Totals $ 9,243 $ 9,300 $ 1,103 $ 8,592 $ 8,743 $ 1,130 The following table presents the average recorded investment in impaired loans for the years ended December 31: (In thousands) 2017 2016 1-4 family first-lien residential mortgages $ 1,553 $ 777 Commercial real estate 5,097 4,325 Commercial lines of credit 447 479 Other commercial and industrial 976 724 Home equity and junior liens 283 325 Other consumer - 2 Total $ 8,356 $ 6,632 The following table presents the cash basis interest income recognized on impaired loans for the years ended December 31: (In thousands) 2017 2016 1-4 family first-lien residential mortgages $ 71 $ 64 Commercial real estate 247 161 Commercial lines of credit 27 22 Other commercial and industrial 30 44 Home equity and junior liens 13 13 Other consumer - - Total $ 388 $ 304

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2017
Allowance For Loan Losses [Abstract]
ALLOWANCE FOR LOAN LOSSES	NOTE 6: ALLOWANCE FOR LOAN LOSSES Changes in the allowance for loan losses for the years ended December 31, 2017 and 2016 and information pertaining to the allocation of the allowance for loan losses and balances of the allowance for loan losses and loans receivable based on individual and collective impairment evaluation by loan portfolio class at the indicated dates are summarized in the tables below. An allocation of a portion of the allowance to a given portfolio class does not limit the Company’s ability to absorb losses in another portfolio class. December 31, 2017 1-4 family first-lien Other residential Commercial Commercial commercial (In thousands) mortgage Construction real estate lines of credit and industrial Allowance for loan losses: Beginning Balance $ 759 $ - $ 2,935 $ 397 $ 1,658 Charge-offs (166 ) - (505 ) (60 ) (22 ) Recoveries 13 - - - 15 Provisions (credits) 259 - 1,159 398 (437 ) Ending balance $ 865 $ - $ 3,589 $ 735 $ 1,214 Ending balance: related to loans individually evaluated for impairment $ 210 $ - $ 320 $ 40 $ 391 Ending balance: related to loans collectively evaluated for impairment $ 655 $ - $ 3,269 $ 695 $ 823 Loans receivables: Ending balance $ 216,793 $ 5,558 $ 192,525 $ 51,131 $ 50,251 Ending balance: individually evaluated for impairment $ 1,858 $ - $ 5,500 $ 547 $ 1,048 Ending balance: collectively evaluated for impairment $ 214,935 $ 5,558 $ 187,025 $ 50,584 $ 49,203 Home equity Other Tax exempt and junior liens consumer Unallocated Total Allowance for loan losses: Beginning Balance $ 1 $ 331 $ 166 $ - $ 6,247 Charge-offs - (69 ) (142 ) - $ (964 ) Recoveries - 6 40 - $ 74 Provisions - 246 144 - $ 1,769 Ending balance $ 1 $ 514 $ 208 $ - $ 7,126 Ending balance: related to loans individually evaluated for impairment $ - $ 142 $ - $ - $ 1,103 Ending balance: related to loans collectively evaluated for impairment $ 1 $ 372 $ 208 $ - $ 6,023 Loans receivables: Ending balance $ 10,405 $ 25,935 $ 28,646 $ 581,244 Ending balance: individually evaluated for impairment $ - $ 290 $ - $ 9,243 Ending balance: collectively evaluated for impairment $ 10,405 $ 25,645 $ 28,646 $ 572,001 December 31, 2016 1-4 family first-lien Other residential Commercial Commercial commercial (In thousands) mortgage Construction real estate lines of credit and industrial Allowance for loan losses: Beginning Balance $ 581 $ - $ 2,983 $ 401 $ 1,270 Charge-offs (242 ) - - (69 ) - Recoveries 13 - 6 11 14 Provisions (credits) 407 - (54 ) 54 374 Ending balance $ 759 $ - $ 2,935 $ 397 $ 1,658 Ending balance: related to loans individually evaluated for impairment $ 117 - $ 455 $ - $ 553 Ending balance: related to loans collectively evaluated for impairment $ 642 - $ 2,480 $ 397 $ 1,105 Loans receivables: Ending balance $ 199,000 $ 8,505 $ 150,698 $ 50,477 $ 40,394 Ending balance: individually evaluated for impairment $ 1,613 $ - $ 5,072 $ 400 $ 1,022 Ending balance: collectively evaluated for impairment $ 197,387 $ 8,505 $ 145,626 $ 50,077 $ 39,372 Home equity Other Tax exempt and junior liens consumer Unallocated Total Allowance for loan losses: Beginning Balance $ 3 $ 350 $ 118 $ - $ 5,706 Charge-offs - (147 ) (61 ) - (519 ) Recoveries - 10 53 - 107 Provisions (credits) (2 ) 118 56 - 953 Ending balance $ 1 $ 331 $ 166 $ - $ 6,247 Ending balance: related to loans individually evaluated for impairment $ - $ 5 $ - - $ 1,130 Ending balance: related to loans collectively evaluated for impairment $ 1 $ 326 $ 166 - $ 5,117 Loans receivables: Ending balance $ 12,523 $ 24,722 $ 6,293 $ 492,612 Ending balance: individually evaluated for impairment $ - $ 485 $ - $ 8,592 Ending balance: collectively evaluated for impairment $ 12,523 $ 24,237 $ 6,293 $ 484,020 The Company’s methodology for determining its allowance for loan losses includes an analysis of qualitative factors that are added to the historical loss rates in arriving at the total allowance for loan losses needed for this general pool of loans. The qualitative factors include: • Changes in national and local economic trends; • The rate of growth in the portfolio; • Trends of delinquencies and nonaccrual balances; • Changes in loan policy; and • Changes in lending management experience and related staffing. Each factor is assigned a value to reflect improving, stable or declining conditions based on management’s best judgment using relevant information available at the time of the evaluation. These qualitative factors, applied to each product class, make the evaluation inherently subjective, as it requires material estimates that may be susceptible to significant revision as more information becomes available. Adjustments to the factors are supported through documentation of changes in conditions in a narrative accompanying the allowance for loan losses analysis and calculation. The allocation of the allowance for loan losses summarized on the basis of the Company’s calculation methodology was as follows: December 31, 2017 1-4 family first-lien Other residential Commercial Commercial commercial (In thousands) mortgage Construction real estate lines of credit and industrial Specifically reserved $ 210 $ - $ 320 $ 40 $ 391 Historical loss rate 104 - 103 40 15 Qualitative factors 551 - 3,166 655 808 Total $ 865 $ - $ 3,589 $ 735 $ 1,214 Home equity Other Tax exempt and junior liens consumer Unallocated Total Specifically reserved $ - $ 142 $ - $ - $ 1,103 Historical loss rate - 41 59 - 362 Qualitative factors 1 331 149 - 5,661 Total $ 1 $ 514 $ 208 $ - $ 7,126 December 31, 2016 1-4 family first-lien Other residential Commercial Commercial commercial (In thousands) mortgage Construction real estate lines of credit and industrial Specifically reserved $ 117 $ - $ 455 $ - $ 553 Historical loss rate 106 - 45 31 50 Qualitative factors 536 - 2,435 366 1,055 Total $ 759 $ - $ 2,935 $ 397 $ 1,658 Home equity Other Tax exempt and junior liens consumer Unallocated Total Specifically reserved $ - $ 5 $ - $ - $ 1,130 Historical loss rate - 35 16 - 283 Qualitative factors 1 291 150 - 4,834 Total $ 1 $ 331 $ 166 $ - $ 6,247

Servicing

Servicing	12 Months Ended
	Dec. 31, 2017
Servicing Asset [Abstract]
SERVICING	NOTE 7: SERVICING Loans serviced for others are not included in the accompanying consolidated statements of condition. At December 31, 2017 and 2016, the Bank serviced 231 and 268 residential mortgage loans for others, respectively. The unpaid principal balances of mortgage loans serviced for others were $14.3 million and $17.0 million at December 31, 2017 and 2016, respectively. The balance of capitalized servicing rights included in other assets at December 31, 2017 and 2016, was $28,000 and $40,000, respectively. The following summarizes mortgage servicing rights capitalized and amortized: (In thousands) 2017 2016 Mortgage servicing rights capitalized $ - $ - Mortgage servicing rights amortized $ 12 $ 12

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Premises and Equipment	NOTE 8: PREMISES AND EQUIPMENT A summary of premises and equipment at December 31, is as follows: (In thousands) 2017 2016 Land $ 2,205 $ 2,205 Buildings 14,917 13,704 Furniture, fixtures and equipment 13,515 12,948 Construction in progress 650 455 31,287 29,312 Less: Accumulated depreciation 15,170 14,135 $ 16,117 $ 15,177 Depreciation expense was $1.0 million in both 2017 and 2016.

Foreclosed Real Estate

Foreclosed Real Estate	12 Months Ended
	Dec. 31, 2017
Real Estate Owned Disclosure Of Detailed Components [Abstract]
Foreclosed Real Estate	NOTE 9: FORECLOSED REAL ESTATE The Company is required to disclose the carrying amount of foreclosed residential real estate properties held at each reporting period as a result of obtaining physical possession of the property. (Dollars in thousands) Number of properties December 31, 2017 Number of properties December 31, 2016 Foreclosed residential real estate 5 $ 468 7 $ 393 At December 31, 2017, the Company reported $805,000 in residential real estate loans in the process of foreclosure.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	NOTE 10: GOODWILL AND INTANGIBLE ASSETS Goodwill represents the excess cost of an acquisition over the fair value of the net assets acquired. Goodwill is not amortized, but is evaluated annually for impairment or between annual evaluations in certain circumstances. Management performs an annual assessment of the Company’s goodwill to determine whether or not any impairment of the carrying value may exist. Of the $4.5 million of goodwill carried on the Company’s books as of December 31, 2017, $3.8 million of this amount was due to prior periods acquisitions of bank branches and $696,000 was due to the 2013 acquisition of the FitzGibbons Agency by Pathfinder Risk Management Company, Inc. and the 2015 acquisition of the Huntington Agency. The Company is permitted to assess qualitative factors to determine if it is more likely than not that the fair value of the reporting unit is less than the carrying value. Based on the results of the assessment, management has determined that the carrying value of goodwill in the amount of $4.5 million is not impaired as of December 31, 2017. The identifiable intangible asset of $182,000 as of December 31, 2017 was due to the acquisition of the FitzGibbons and Huntington Agencies and represents the amortized carrying amount of the customer lists intangible. The weighted average amortization period of this intangible asset is 7.0 years. The gross carrying amount and annual amortization for this identifiable intangible asset are as follows: December 31, (In thousands) 2017 2016 Gross carrying amount $ 198 $ 214 Accumulated amortization (16 ) (16 ) Net amortizing intangibles $ 182 $ 198 The estimated amortization expense for each of the five succeeding years ended December 31, is as follows: (In thousands) 2018 $ 16 2019 16 2020 16 2021 16 2022 16 Thereafter 102 Total $ 182

Deposits

Deposits	12 Months Ended
	Dec. 31, 2017
Deposits [Abstract]
DEPOSITS	NOTE 11: DEPOSITS A summary of deposits at December 31 is as follows: (In thousands) 2017 2016 Savings accounts $ 80,587 $ 80,139 Time accounts 160,736 132,007 Time accounts of $250,000 or more 52,691 57,349 Money management accounts 14,905 14,718 MMDA accounts 253,088 192,692 Demand deposit interest-bearing 66,093 53,587 Demand deposit noninterest-bearing 89,783 75,282 Mortgage escrow funds 5,720 5,209 Total Deposits $ 723,603 $ 610,983 At December 31, 2017, the scheduled maturities of time deposits are as follows: (In thousands) Year of Maturity: 2018 $ 146,318 2019 42,244 2020 14,522 2021 5,889 2022 2,613 Thereafter 1,841 Total $ 213,427 In addition to deposits obtained from its business operations within its target market areas, the Bank also obtains brokered deposits through various programs administered by Promontory Interfinancial Network. At December 31, 2017 2016 (In thousands) Non-Brokered Brokered Total Non-Brokered Brokered Total Savings accounts $ 80,587 $ - $ 80,587 $ 80,139 $ - $ 80,139 Time accounts 109,666 51,070 $ 160,736 89,200 42,807 132,007 Time accounts of $250,000 or more 52,691 - $ 52,691 57,349 - 57,349 Money management accounts 14,905 - $ 14,905 14,718 - 14,718 MMDA accounts 159,032 94,056 $ 253,088 105,755 86,937 192,692 Demand deposit interest-bearing 66,093 - $ 66,093 53,587 - 53,587 Demand deposit noninterest-bearing 89,783 - $ 89,783 75,282 - 75,282 Mortgage escrow funds 5,720 - $ 5,720 5,209 - 5,209 Total Deposits $ 578,477 $ 145,126 $ 723,603 $ 481,239 $ 129,744 $ 610,983

Borrowed Funds

Borrowed Funds	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
BORROWED FUNDS	NOTE 12: BORROWED FUNDS The composition of borrowings (excluding subordinated loans) at December 31 is as follows: (In thousands) 2017 2016 Short-term: FHLB Advances $ 30,600 $ 42,000 Deferred fees hedging - (53 ) Total short-term borrowings $ 30,600 $ 41,947 Long-term: FHLB advances $ 43,288 $ 17,000 Total long-term borrowings $ 43,288 $ 17,000 The principal balances, interest rates and maturities of the outstanding long-term borrowings, all of which are at a fixed rate, at December 31, 2017 are as follows: Term Principal Rates (Dollars in thousands) Advances with FHLB Due within 1 year $ 2,000 1.04% Due within 2 years 31,228 1.16-2.00% Due within 10 years 10,060 1.62-2.55% Total advances with FHLB $ 43,288 Total long-term fixed rate borrowings $ 43,288 At December 31, 2017, scheduled repayments of long-term debt are as follows: (In thousands) 2018 $ 2,000 2019 31,228 2020 7,060 2021 1,000 2022 2,000 Thereafter - Total $ 43,288 The Company has access to Federal Home Loan Bank advances, under which it can borrow at various terms and interest rates. Residential mortgage loans with a carrying value of $148.1 million and FHLB stock with a carrying value of $3.9 million have been pledged by the Company under a blanket collateral agreement to secure the Company’s borrowings at December 31, 2017. The total outstanding indebtedness under borrowing facilities with the FHLB cannot exceed the total value of the assets pledged under the blanket collateral agreement. The Company has a $19.9 million line of credit available at December 31, 2017 with the Federal Reserve Bank of New York through its Discount Window and has pledged various corporate and municipal securities against the line. The Company has $14.4 million in lines of credit available with three other correspondent banks. $9.4 million of that line of credit is available on an unsecured basis and the remaining $5.0 million must be collateralized with marketable investment securities. Interest on the lines is determined at the time of borrowing.

Subordinated Loans

Subordinated Loans	12 Months Ended
	Dec. 31, 2017
Subordinated Borrowings [Abstract]
SUBORDINATED LOANS	NOTE 13: SUBORDINATED LOANS The Company has a non-consolidated subsidiary trust, Pathfinder Statutory Trust II, of which the Company owns 100% of the common equity. The Trust issued $5,000,000 of 30-year floating rate Company-obligated pooled capital securities of Pathfinder Statutory Trust II (“Floating-Rate Debentures”). The Company borrowed the proceeds of the capital securities from its subsidiary by issuing floating rate junior subordinated deferrable interest debentures having substantially similar terms. The capital securities mature in 2037 and are treated as Tier 1 capital by the Federal Deposit Insurance Corporation and the Federal Reserve Board (“FRB”). The capital securities of the trust are a pooled trust preferred fund of Preferred Term Securities VI, Ltd. and are tied to the 3-month LIBOR (1.69%) plus 1.65% for a total of 3.34% at December 31, 2017 with a five-year call provision. The Company guarantees all of these securities. The Company's equity interest in the trust subsidiary is included in other assets on the Consolidated Statements of Financial Condition at December 31, 2017 and 2016. For regulatory reporting purposes, the Federal Reserve has indicated that the preferred securities will continue to qualify as Tier 1 Capital subject to previously specified limitations, until further notice. If regulators make a determination that Trust Preferred Securities can no longer be considered in regulatory capital, the securities become callable and the Company may redeem them. On October 15, 2015, the Company executed the $10.0 million non-amortizing subordinated loan with an unrelated third party that is scheduled to mature on October 1, 2025. The Company has the right to prepay the subordinated loan at any time after October 15, 2020 without penalty. The terms of the subordinated loan required interest payments at an annual interest rate of 3.50% from October 15, 2015 to February 29, 2016. The annual interest rate charged the Company increased to 6.25% on March 1, 2016 through the maturity date. The Subordinated Loan is senior in the Company’s credit repayment hierarchy only to the Company’s common equity and, as a result, qualifies as Tier 2 capital for all future periods when applicable. The Company paid $172,000 in origination and legal fees as part of this transaction. These fees will be amortized over the life of the subordinated loan through its first call date using the effective interest method. The effective cost of funds related to this transaction is 6.44% calculated under this method. The composition of subordinated loans at December 31 is as follows: (In thousands) 2017 2016 Subordinated loans: Junior subordinated debenture $ 5,155 $ 5,155 Subordinated loan 9,904 9,870 Total subordinated loans $ 15,059 $ 15,025 The principal balances, interest rates and maturities of the subordinated loans at December 31, 2017 are as follows: Term Principal Rates (Dollars in thousands) Subordinated loans: Due within 10 years $ 9,904 6.48% Due within 20 years 5,155 3-Month Libor + 1.65% Total subordinated loans $ 15,059 At December 31, 2017, scheduled repayments of the subordinated loans: (In thousands) 2018 $ - 2019 - 2020 - 2021 - 2022 - Thereafter 15,059 Total $ 15,059

Employee Benefits and Deferred

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans	12 Months Ended
	Dec. 31, 2017
Compensation And Retirement Disclosure [Abstract]
EMPLOYEE BENEFITS AND DEFERRED COMPENSATION AND SUPPLEMENTAL RETIREMENT PLANS	NOTE 14: Employee Benefits and Deferred Compensation and Supplemental Retirement Plans The Company has a noncontributory defined benefit pension plan covering substantially all employees. The plan provides defined benefits based on years of service and final average salary. On May 14, 2012, the Company informed its employees of its decision to freeze participation and benefit accruals under the plan, primarily to reduce some of the volatility in earnings that can accompany the maintenance of a defined benefit plan. The plan was frozen on June 30, 2012. Compensation earned by employees up to June 30, 2012 is used for purposes of calculating benefits under the plan but there will be no future benefit accruals after this date. Participants as of June 30, 2012 will continue to earn vesting credit with respect to their frozen accrued benefits as they continue to work. In addition, the Company provides certain health and life insurance benefits for a limited number of eligible retired employees. The healthcare plan is contributory with participants’ contributions adjusted annually; the life insurance plan is noncontributory. Employees with less than 14 years of service as of January 1, 1995, are not eligible for the health and life insurance retirement benefits. The following tables set forth the changes in the plans’ benefit obligations, fair value of plan assets and the plans’ funded status as of December 31: Pension Benefits Postretirement Benefits (In thousands) 2017 2016 2017 2016 Change in benefit obligations: Benefit obligations at beginning of year $ 9,323 $ 9,319 $ 154 $ 159 Service cost - - - - Interest cost 473 464 8 8 Actuarial loss (gain) 916 (231 ) 332 - Benefits paid (243 ) (229 ) (13 ) (13 ) Benefit obligations at end of year 10,469 9,323 481 154 Change in plan assets: Fair value of plan assets at beginning of year 13,634 12,808 - - Actual return on plan assets 1,565 1,055 - - Benefits paid (243 ) (229 ) (13 ) (13 ) Employer contributions - - 13 13 Fair value of plan assets at end of year 14,956 13,634 - - Funded Status - asset (liability) $ 4,487 $ 4,311 $ (481 ) $ (154 ) The funded status of the pension was recorded within other assets on the statement of condition. The unfunded status of the postretirement plan is recorded as a liability on the statement of condition. Amounts recognized in accumulated other comprehensive loss as of December 31 are as follows: Pension Benefits Postretirement Benefits (In thousands) 2017 2016 2017 2016 Net loss/(gain) $ 2,827 $ 2,685 $ 176 $ (165 ) Tax Effect 1,131 1,074 70 (66 ) $ 1,696 $ 1,611 $ 106 $ (99 ) Gains and losses in excess of 10% of the greater of the benefit obligation or the fair value of assets are amortized over the average remaining service period of active participants. The Company utilized the actual projected cash flows of the participants in both plans for the years ended December 31, 2017 and December 31, 2016. The following points address the approach taken. 1. An analysis of the defined benefit pension plan’s expected future cash flows and high-quality fixed income investments currently available and expected to be available during the period to maturity of the pension benefits yielded a single discount rate of 4.58% at December 31, 2017. 2. An analysis of the postretirement health plan’s expected future cash flows and high-quality fixed-income investments currently available and expected to be available during the period to maturity of the retiree medical benefits yielded a single discount rate of 4.58% at December 31, 2017. 3. Each discount rate was developed by matching the expected future cash flows of Pathfinder Bank to high quality bonds. Every bond considered has earned ratings of at least AA by Fitch Group, AA by Standard & Poor’s, or Aa2 by Moody’s Investor Services. The accumulated benefit obligation for the defined benefit pension plan was $10.5 million and $9.3 million at December 31, 2017 and 2016, respectively. The postretirement plan had an accumulated benefit obligation of $481,000 and $154,000 at December 31, 2017 and 2016, respectively. The significant assumptions used in determining the benefit obligations as of December 31, are as follows: Pension Benefits Postretirement Benefits 2017 2016 2017 2016 Weighted average discount rate 4.58 % 5.15 % 4.58 % 5.32 % Rate of increase in future compensation levels - - - - Assumed health care cost trend rates have a significant effect on the amounts reported for the postretirement health care plan. The annual rates of increase in the per capita cost of covered medical and prescription drug benefits for future years were assumed to be 5.00% for 2018, gradually decreasing to 4.50% in 2021 and remain at that level thereafter. The composition of the net periodic benefit plan cost for the years ended December 31 is as follows: Pension Benefits Postretirement Benefits (In thousands) 2017 2016 2017 2016 Service cost $ - $ - $ - $ - Interest cost 473 464 8 8 Expected return on plan assets (945 ) (951 ) - - Amortization of transition obligation - - - - Amortization of net losses/(gains) 154 226 (3 ) (3 ) Amortization of unrecognized past service liability - - (5 ) (5 ) Net periodic benefit plan benefit $ (318 ) $ (261 ) $ - $ - The significant assumptions used in determining the net periodic benefit plan cost for years ended December 31, were as follows: Pension Benefits Postretirement Benefits 2017 2016 2017 2016 Weighted average discount rate 4.58 % 5.05 % 4.58 % 5.23 % Expected long term rate of return on plan assets 7.00 % 7.50 % - - Rate of increase in future compensation levels - - - - The long term rate of return on assets assumption was set based on historical returns earned by equities and fixed income securities, adjusted to reflect expectations of future returns as applied to the plan’s target allocation of asset classes. Equities and fixed income securities were assumed to earn real rates of return in the ranges of 6.0%-8.0% and 3.0%-5.0%, respectively. The long-term inflation rate was estimated to be 2.5%. When these overall return expectations are applied to the plan’s target allocation, the expected rate of return was determined to be in the range of 5.0% to 7.0%. Management chose to use a 7.0% expected long-term rate of return in 2017 and a 7.0% expected long-term rate of return in 2018 reflecting current economic conditions and expected rates of return. Based on the $15.0 million fair value of plan assets at December 31, 2017, each 50 basis point decrease in the expected long-term rate of return would reduce after tax net income at 2018 expected marginal tax rate of 26.1% by approximately $55,000. The estimated net actuarial loss that will be amortized from accumulated other comprehensive loss into net periodic benefit plan income during 2018 is $164,000. The estimated amortization of the unrecognized transition obligation and actuarial loss for the postretirement health plan in 2018 is $13,000. The expected net periodic benefit plan benefit for 2018 is estimated to be $371,000 for both retirement plans in aggregate. Plan assets are invested in four diversified investment funds of the Pentegra Retirement Trust (the “Trust”, formerly known as RSI Retirement Trust). The Trust has been given discretion by the Plan Sponsor to determine the appropriate strategic asset allocation versus plan liabilities, as governed by the Trust’s Investment Policy Statement. The Plan is structured to utilize a Liability Driven Investment (LDI) approach which seeks to fund the current and future liabilities of the Plan and aims to mitigate funded status and contribution volatility. The Plan’s asset allocation targets to hold 38% of assets in equity securities via investment in the Long-Term Growth – Equity Portfolio (‘LTGE’), 16% in intermediate-term investment grade bonds via investment in the Long-Term Growth – Fixed-Income Portfolio (‘LTGFI’), 35% in long duration bonds via the Liability Focused Fixed-Income Portfolio (‘LFFI’), 10% in an alternative asset fund (the ALT Portfolio), and 1% in a cash equivalents portfolio (for liquidity). LTGE is a diversified portfolio that invests in a number of actively and passively managed equity-focused mutual funds and collective investment trusts. The Portfolio holds a diversified mix of equity funds in order to gain exposure to the U.S. and non-U.S. equity markets. LTGFI is a diversified portfolio that invests in a number of fixed-income mutual funds and collective investment trusts. The Portfolio invests primarily in intermediate-term bond funds with a focus on Core Plus fixed-income investment approaches. LFFI is a diversified high quality fixed-income portfolio that currently invests in passively managed collective investment trusts that hold long duration bonds. The ALT Portfolio invests in professionally managed private funds that hold alternative assets. The Portfolio currently invests in long/short equity hedge funds. The investment objectives, investment strategies and risk of each of the daily valued and unitized Portfolios and the funds held within the Portfolios are detailed in the Private Placement Memorandum and the Trust’s Investment Policy Statement. The overall long-term investment objectives are to maintain plan assets at a level that will sufficiently cover long-term obligations and to generate a return on plan assets that will meet or exceed the rate at which long-term obligations will grow. The LTGE and LTGFI Portfolios are designed to provide long-term growth of equity and fixed-income assets with the objective of achieving an investment return in excess of the cost of funding the active life, deferred vested, and all 30-year term and longer obligations of retired lives in the Trust. The LFFI Portfolio is designed with a relatively long duration and to be correlated with plan liabilities. The ALT Strategy is designed to add diversification via the addition of relatively low correlation assets. Risk/volatility is further managed by the distinct investment objectives of each of the Trust’s Portfolios. In addition, significant consideration is paid to the plan’s funding levels when determining the overall asset allocation. If the plan is considered to be well-funded, approximately 65% of the plan’s assets are allocated to equities and approximately 35% allocated to fixed-income. Asset rebalancing normally occurs when the equity and fixed-income allocations vary by more than 10% from their respective targets (i.e., a 10% policy range guideline). Pension plan assets measured at fair value are summarized below: At December 31, 2017 (In thousands) Level 1 Level 2 Level 3 Total Fair Value Asset Category: Mutual funds - equity Large-cap value (a) $ - $ 1,058 $ - $ 1,058 Large-cap Growth (b) - 1,102 - 1,102 Large-cap Core (c) - 733 - 733 Mid-cap Value (d) - 236 - 236 Mid-cap Growth (e) - 223 - 223 Mid-cap Core (f) - 239 - 239 Small-cap Value (g) - 178 - 178 Small-cap Growth (h) - 169 - 169 Small-cap Core (i) - 349 - 349 International Equity (j) - 1,419 - 1,419 Equity -Total - 5,706 - 5,706 Fixed Income Funds Fixed Income-US Core (k) - 1,713 - 1,695 Intermediate Duration (l) - 3,075 - 2,932 Long Duration (m) - 2,630 - 2,474 Fixed Income-Total - 7,418 - 7,418 Long/Short Equity(n) - 1,533 - 1,533 Company Common Stock - - - - Cash Equivalents-Money market* 58 241 - 299 Total $ 58 $ 14,898 $ - $ 14,956 At December 31, 2016 (In thousands) Level 1 Level 2 Level 3 Total Fair Value Asset Category: Mutual funds - equity Large-cap value (a) $ - $ 958 $ - $ 958 Large-cap Growth (b) - 860 - 860 Large-cap Core (c) - 609 - 609 Mid-cap Value (d) - 204 - 204 Mid-cap Growth (e) - 186 - 186 Mid-cap Core (f) - 209 - 209 Small-cap Value (g) - 167 - 167 Small-cap Growth (h) - 140 - 140 Small-cap Core (i) - 312 - 312 International Equity (j) - 1,131 - 1,131 Equity -Total - 4,776 - 4,776 Fixed Income Funds Fixed Income-US Core (k) - 1,695 - 1,695 Intermediate Duration (l) - 2,932 - 2,932 Long Duration (m) - 2,474 - 2,474 Fixed Income-Total - 7,101 - 7,101 Long/Short Equity(n) - 1,165 - 1,165 Company Common Stock - - - - Cash Equivalents-Money market* 70 522 - 592 Total $ 70 $ 13,564 $ - $ 13,634 *Includes cash equivalents investments in equity and fixed income strategies a) This category contains large-cap stocks with above-average yield. The portfolio typically holds between 60 and 70 stocks. b) This category seeks long-term capital appreciation by investing primarily in large growth companies based in the U.S. c) This fund tracks the performance of the S&P 500 index by purchasing the securities represented in the index in approximately the same weightings as the index. d) This category employs an indexing investment approach designed to track the performance of the CRSP US Mid-Cap Value Index. e) This category employs an indexing investment approach designed to track the performance of the CRSP US Mid-Cap Growth Index. f) This category seeks to track the performance of the S&P Midcap 400 Index. g) This category consists of a selection of investments based on the Russell 2000 Value Index. h) This category consists of a selection of investments based on the Russell 2000 Growth Index. i) This category consists of an index fund designed to track the Russell 2000, along with a fund investing in readily marketable securities of U.S. companies with market capitalizations within the smallest 10% of the market universe, or smaller than the 1000th largest US company. j) This category has investments in medium to large non-US companies, including high quality, durable growth companies and companies based in countries with stable economic and political systems. A portion of this category consists of an index fund designed to track the MSC ACWI ex-US Net Dividend Return Index. k) This category currently includes equal investments in three mutual funds, two of which usually hold at least 80% of fund assets in investment grade fixed income securities, seeking to outperform the Barclays US Aggregate Bond Index while maintaining a similar duration to that index. The third fund targets investments of 50% or more in mortgage-backed securities guaranteed by the US government and its agencies. l) This category consists mostly of a fund which seeks to track the Barclays Capital US Corporate A or Better 5-20 Year, Bullets only Index, along with a diversified mutual fund holding fixed income securities rated A or better. m) This category consists of a fund that seeks to approximate the performance of the Barclays Capital US Corporate A or Better, 20+ Year Bullets Only Index over the long term. n) This category currently invests in three long/short equity hedge funds. For the fiscal year ending December 31, 2018, the Company expects to contribute approximately $32,000 to the postretirement plan. The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid from both retirement plans: Pension Postretirement (In thousands) Benefits Benefits Total Years ending December 31: 2018 $ 297 $ 32 $ 329 2019 306 34 340 2020 324 35 359 2021 341 37 378 2022 364 39 403 Years 2023-2027 2,626 140 2,766 The Company also offers a 401(k) plan to its employees. Contributions to this plan by the Company were $333,000 and $300,000 for 2017 and 2016, respectively. In addition, the Company made a $ The Company maintains optional deferred compensation plans for its directors and certain executive officers, whereby fees and income normally received are deferred and paid by the Company based upon a payment schedule commencing at age 65 and continuing monthly for 10 years. Directors must serve on the board for a minimum of 5 years to be eligible for the Plan. At December 31, 2017 and 2016, other liabilities include approximately $2.6 million and $2.4 million, respectively, relating to deferred compensation. Deferred compensation expense for the years ended December 31, 2017 and 2016 amounted to approximately $351,000 and $339,000, respectively. To assist in the funding of the Company’s benefits under the supplemental executive retirement plan and deferred compensation plans, the Company is the owner of single premium life insurance policies on selected participants. At December 31, 2017 and 2016, the cash surrender values of these policies were $11.7 million and $11.5 million, respectively. The Bank adopted a Defined Contribution Supplemental Executive Retirement Plan (the “SERP”), effective January 1, 2014. The SERP benefits certain key senior executives of the Bank who are selected by the Board to participate, including our Named Executive Officers. The SERP is intended to provide a benefit from the Bank upon retirement, death, disability or voluntary or involuntary termination of service (other than “for cause”), subject to the requirements of Section 409A of the Internal Revenue Code. Accordingly, the SERP obligates the Bank to make a contribution to each executive’s account on the last business day of each calendar year. In addition, the Bank, may, but is not required to, make additional discretionary contributions to the executive’s accounts from time to time. All executives currently participating in the plan, including the Named Executive Officers, are fully vested in the Bank’s contribution to the plan. In the event the executive is terminated involuntarily or resigns for good reason within 24 months following a change in control, the Bank is required to make additional annual contributions the lesser of: (1) three years or (2) the number of years remaining until the executive’s benefit age, subject to potential reduction to avoid an excess parachute payment under Code Section 280G. In the event of the executive’s death, disability or termination within 24 months after a change in control, the executive’s account will be paid in a lump sum to the executive or his beneficiary, as applicable. In the event the executive is entitled to a benefit from the SERP due to retirement or other termination of employment, the benefit will be paid either in a lump sum or in 10 annual installments as detailed in his or her participant agreement. At December 31, 2017, other liabilities included $631,000 accrued under this plan.

Stock Based Compensation Plans

Stock Based Compensation Plans	12 Months Ended
	Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
STOCK BASED COMPENSATION PLANS	NOTE 15: Stock Based Compensation PlanS All share and per share values have been adjusted, where appropriate, by the 1.6472 exchange rate used in the Conversion and Offering that occurred on October 16, 2014. April 2010 Stock Option Grants In June 2011, the board of directors of the Company approved the grant of stock option awards to its directors and executive officers under the 2010 Stock Option Plan that had 247,080 shares authorized for award. A total of 74,124 stock option awards were granted to the nine directors of the Company, at that time, and 123,540 stock option awards, in total, were granted to the Chief Executive Officer and the Company’s then four senior vice presidents. The awards will vest ratably over five years (20% per year for each year of the participant’s service with the Company) and will expire ten years from the date of the grant, or June 2021. The fair value of each option grant was established at the date of grant using the Black-Scholes option pricing model. The Black-Scholes model used the following weighted average assumptions: risk-free interest rate of 2.2%; volatility factors of the expected market price of the Company's common stock of 0.45; weighted average expected lives of the options of 7.0 years: cash dividend yield of 1.49%. Based upon these assumptions, the weighted average fair value of options granted was $2.29. In July 2013, the board of directors of the Company approved the grant of 16,472 stock option awards in total to two newly elected directors of the Company. The awards will vest ratably over five years (20% per year for each year of the participant’s service with the Company) and will expire ten years from the date of the grant, or July 2023. The fair value of each option grant was established at the date of grant using the Black-Scholes option pricing model. The Black-Scholes model used the following weighted average assumptions: risk-free interest rate of 2.0%; volatility factors of the expected market price of the Company's common stock of 0.45; weighted average expected lives of the options of 7.0 years: cash dividend yield of 1.0%. Based upon these assumptions, the weighted average fair value of options granted was $3.69. In November 2015, the board of directors of the Company approved the grant of 16,472 stock option awards in total to two newly elected directors of the Company. The awards will vest ratably over five years (20% per year for each year of the participant’s service with the Company) and will expire ten years from the date of the grant, or November 2025. The fair value of each option grant was established at the date of grant using the Black-Scholes option pricing model. The Black-Scholes model used the following weighted average assumptions: risk-free interest rate of 1.9%; volatility factors of the expected market price of the Company's common stock of 0.23; weighted average expected lives of the options of 7.0 years: cash dividend yield of 1.4%. Based upon these assumptions, the weighted average fair value of options granted was $2.56. In April 2016, the board of directors of the Company approved the grant of 47,768 stock option awards in total to three officers and one recently promoted senior officer. The awards will vest ratably over five years (20% per year for each year of the participant’s service with the Company) and will expire ten years from the date of the grant, or April 2026. The fair value of each option grant was established at the date of grant using the Black-Scholes option pricing model. The Black-Scholes model used the following weighted average assumptions: risk-free interest rate of 1.6%; volatility factors of the expected market price of the Company's common stock of 0.32; weighted average expected lives of the options of 7.0 years: cash dividend yield of 1.55%. Based upon these assumptions, the weighted average fair value of options granted was $3.17. May 2016 Stock Option Grants In May 2016, the board of directors of the Company approved the grant of stock option awards to its directors, executive Officers, senior officers and officers under the 2016 Equity Incentive Plan that was approved at the Annual Meeting of Shareholders on May 4, 2016 when 263,605 shares were authorized for award. A total of 79,083 stock option awards were granted to the nine directors of the Company and 44,812 stock option awards, in total, were granted to thirteen officers. The awards will vest ratably over five years (20% per year for each year of the participant’s service with the Company) and will expire ten years from the date of the grant, or May 2026. The fair value of each option grant was established at the date of grant using the Black-Scholes option pricing model. The Black-Scholes model used the following weighted average assumptions: risk-free interest rate of 1.6%; volatility factors of the expected market price of the Company's common stock of 0.32; weighted average expected lives of the options of 7.0 years: cash dividend yield of 1.55%. Based upon these assumptions, the weighted average fair value of options granted was $3.32. A total of 92,261 stock option awards were granted to the Chief Executive Officer, two executive officers and three senior officers. The awards will vest ratably over seven years (approximately 14.28% per year for each year of the participant’s service with the Company) with the exception of one senior officer whose awards vested upon retirement on August 1, 2017 and will expire ten years from the date of the grant, or May 2026. The fair value of each option grant was established at the date of grant using the Black-Scholes option pricing model. The Black-Scholes model used the following weighted average assumptions: risk-free interest rate of 1.7%; volatility factors of the expected market price of the Company's common stock of 0.32; weighted average expected lives of the options of 7.0 years: cash dividend yield of 1.55%. Based upon these assumptions, the weighted average fair value of options granted was $3.59. Activity in the stock option plans is as follows: Weighted Options Average Shares (Shares in thousands) Outstanding Exercise Price Exercisable Outstanding at December 31, 2015 185 $ 5.75 128 Granted 264 $ 11.25 - Newly vested - 6.21 37 Exercised (26 ) - (26 ) Expired - - - Outstanding at December 31, 2016 423 $ 6.21 139 Granted - $ - - Newly vested - 10.92 57 Exercised (28 ) - (28 ) Expired - - - Outstanding at December 31, 2017 395 $ 10.92 168 The aggregate intrinsic value of a stock option represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options prior to the expiration date. The intrinsic value can change based on fluctuations in the market value of the Company’s stock. At December 31, 2017, the intrinsic value of the stock options was $2.3 million. At December 31, 2016, the intrinsic value of the stock options was $1.7 million. At December 31, 2017, there were 395,177 options outstanding, of which 167,835 were exercisable at an average exercise price of $7.61, and an average remaining contractual life of 5.3 years. May 2016 Restricted Stock Unit Grants In May 2016, the board of directors of the Company approved the grant of restricted stock units to its directors, executive officers, senior officers and officers under the 2016 Equity Incentive Plan that was approved at the Annual Meeting of Shareholders on May 4, 2016 when 105,442 shares were authorized for award. A total of 31,635 restricted stock units were granted to the nine directors of the Company and 8,436 restricted stock units, in total, were granted to two officers. The units will vest ratably over five years (20% per year for each year of the participant’s service with the Company). A total of 46,570 restricted stock units, in total, were granted to the Chief Executive Officer, two executive officers and three senior officers. The units will vest ratably over seven years (approximately 14.28% per year for each year of the participant’s service with the Company) with the exception of one senior officer whose units vested upon retirement on August 1, 2017. The compensation expense of the stock option awards and restricted stock units is based on the fair value of the instruments on the date of grant. The Company recorded compensation expense in the amount of $345,000 and $264,000 in 2017 and 2016, respectively, and is expected to record $320,000, $313,000, $312,000, $173,000, $110,000 and $37,000 in 2018 through 2023.

Employee Stock Ownership Plan

Employee Stock Ownership Plan	12 Months Ended
	Dec. 31, 2017
Employee Stock Ownership Plan [Abstract]
EMPLOYEE STOCK OWNERSHIP PLAN	NOTE 16: EMPLOYEE STOCK OWNERSHIP PLAN The Bank established the Pathfinder Bank Employee Stock Ownership Plan (“Plan”) to purchase stock of the Company for the benefit of its employees. In July 2011, the Plan received a $1.1 million loan from Community Bank, N.A., guaranteed by the Company, to fund the Plan’s purchase of 125,000 shares of the Company’s treasury stock. The loan was being repaid in equal quarterly installments of principal plus interest over ten years beginning October 1, 2011. Interest accrued at the Wall Street Journal Prime Rate plus 1.00%, and was secured by the unallocated shares of the ESOP stock. This loan was refinanced in connection with the Conversion and Offering that occurred on October 16, 2014. In connection with the Conversion and Offering, the ESOP purchased 105,442 shares issued in the offering by obtaining a loan from the Company which was used to purchase both the additional shares and refinance the remaining outstanding balance on the loan from Community Bank N.A. There were 138,982.5 shares associated with the refinanced loan resulting in a total of 244,424.5 shares associated with the new loan provided by the Company. The ESOP loan from the Company has a ten year term and is being repaid in equal payments of principal and interest under a fixed rate of interest equal to 3.25% which was the prime rate of interest on the date of the closing of the offering. This ESOP loan from the Company, also referred to as an internally leveraged ESOP, does not appear as a liability on the Company’s consolidated statement of condition as of December 31, 2017 in accordance with ASC 718-40-25-9d. In accordance with the payment of principal on the loan, a proportionate number of shares are allocated to the employees over the ten year time horizon of the loan. Participants’ vesting interest in the shares of Company stock is at the rate of 20% per year. Compensation expense is recorded based on the number of shares released to the participants times the average market value of the Company’s stock over that same period. Dividends on unallocated shares, recorded as compensation expense on the income statement, are made available to the participants' account. The Company recorded $404,000 and $333,000 in compensation expense in 2017 and 2016, respectively, including $37,000 and $40,000 for dividends on unallocated shares in these same time periods. At December 31, 2017, there were 164,987 unearned ESOP shares with a fair value of $2.5 million.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES	NOTE 17: Income Taxes The provision for income taxes for the years ended December 31, is as follows: (In thousands) 2017 2016 Current $ 1,022 $ 1,360 Deferred (100 ) (249 ) $ 922 $ 1,111 The provision for income taxes includes the following (In thousands) 2017 2016 Federal Income Tax $ 741 $ 980 State Tax 181 131 $ 922 $ 1,111 The components of the net deferred tax asset, included in other assets as of December 31, are as follows: (In thousands) 2017 2016 Assets: Deferred compensation $ 847 $ 912 Allowance for loan losses 1,862 2,392 Postretirement benefits 126 56 Subordinated loan interest 23 37 Investment securities and financial derivative 551 1,229 Impairment losses on investment securities - 88 Loan origination fees 108 184 Capital loss carryforward - 62 Held-to-maturity securities 153 310 Other 212 166 Total 3,882 5,436 Liabilities: Prepaid pension (1,173 ) (1,605 ) Depreciation (968 ) (1,083 ) Accretion (120 ) (211 ) Intangible assets (1,004 ) (1,470 ) Mortgage servicing rights (7 ) (15 ) Prepaid expenses and transaction fees (79 ) (204 ) Total (3,351 ) (4,588 ) 531 848 Less: deferred tax asset valuation allowance - (150 ) Net deferred tax asset $ 531 $ 698 Realization of deferred tax assets is dependent upon the generation of future taxable income or the existence of sufficient taxable income within the carry back period. A valuation allowance is provided when it is more likely than not that some portion, or all of the deferred tax assets, will not be realized. In assessing the need for a valuation allowance, management considers the scheduled reversal of the deferred tax liabilities, the level of historical taxable income and the projected future level of taxable income over the periods in which the temporary differences comprising the deferred tax assets will be deductible. Deferred income tax assets and liabilities are determined using the liability method. Under this method, the net deferred tax asset or liability is recognized for the future tax consequences. This is attributable to the differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases as well as net operating and capital loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates applied to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income tax expense in the period that includes the enactment date. If current available evidence about the future raises doubt about the likelihood of a deferred tax asset being realized, a valuation allowance is established. The judgment about the level of future taxable income, including that which is considered capital, is inherently subjective and is reviewed on a continual basis as regulatory and business factors change. In prior years, management believed that it may not have been able to generate sufficient future taxable income in the form of capital gains to offset its capital loss carry forward position before those potential tax benefits expired. Accordingly, a valuation allowance of $150,000 was maintained at December 31, 2016. During 2017, the Company recognized net capital gains of $428,000, effectively utilizing all capital loss carryforward tax benefits established in prior years and thereby eliminating the need for any valuation allowance related to the future utilization of those carryforwards at December 31, 2017. As a result, the Company maintained no valuation allowance related to future tax benefits related to the utilization of capital loss carryforwards at December 31, 2017. On December 22, 2017 the Tax Act was signed into law. The Tax Act instituted significant changes to various sections of the Internal Revenue Code that effects the Company. Most notably, the Tax Act reduces the Company’s marginal federal income tax rate from 34% to 21% starting January 1, 2018. Generally Accepted Accounting Principles (“GAAP”) requires that the impact of the provisions of the Tax Act be accounted for in the period of enactment. Accordingly, the Company recorded an income tax benefit in the fourth quarter of 2017 related to the Tax Act in the amount of $155,000. The reduction in income tax expense was largely attributable to the reduction in the value of net deferred tax assets and liabilities reflecting lower future tax obligations resulting from the Tax Act’s enacted lower federal corporate tax rate. A reconciliation of the federal statutory income tax rate to the effective income tax rate for the years ended December 31, is as follows: 2017 2016 Federal statutory income tax rate 34.0 % 34.0 % State tax, net of federal benefit 2.9 1.9 Tax-exempt interest income (11.2 ) (8.6 ) Increase in value of bank owned life insurance less premiums paid (2.0 ) (2.0 ) Change in valuation allowance (3.5 ) (2.6 ) Remeasurement of net deferred tax assets for tax rate reduction - Tax Cuts & Jobs Act (3.5 ) - Other 4.5 2.5 Effective income tax rate - Pathfinder Bancorp, Inc. 21.2 % 25.2 % Minority interest (0.6 ) 0.3 Effective income tax rate 20.6 % 25.5 %

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	NOTE 18: Commitments and Contingencies The Company is a 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 extend credit and standby letters of credit. Such commitments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the consolidated statement of condition. The contractual amount of those commitments to extend credit reflects the extent of involvement the Company has in this particular class of financial instrument. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual amount of the instrument. The Company uses the same credit policies in making commitments as it does for on-balance sheet instruments. At December 31, 2017 and 2016, the following financial instruments were outstanding whose contract amounts represent credit risk: Contract Amount (In thousands) 2017 2016 Commitments to grant loans $ 58,235 $ 46,649 Unfunded commitments under lines of credit 62,879 48,653 Unfunded commitments related to construction loans in progress 3,506 5,918 Standby letters of credit 2,153 1,900 Commitments to extend credit are agreements to lend to a customer as long as 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 some of the commitment amounts are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the counter party. Collateral held varies but may include residential real estate and income-producing commercial properties. Loan commitments outstanding at December 31, 2017 with fixed interest rates amounted to approximately $11.1 million. Loan commitments, including unused lines of credit and standby letters of credit, outstanding at December 31, 2017 with variable interest rates amounted to approximately $112.2 million. These outstanding loan commitments carry current market rates. Unfunded commitments under standby letters of credit, revolving credit lines and overdraft protection agreements are commitments for possible future extensions of credit to existing customers. These lines of credit usually do not contain a specified maturity date and may not be drawn upon to the total extent to which the Company is committed. Letters of credit written are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Generally, all letters of credit, when issued have expiration dates within one year. The credit risk involved in issuing letters of credit is essentially the same as those that are involved in extending loan facilities to customers. The Company generally holds collateral and/or personal guarantees supporting these commitments. Management believes that the proceeds obtained through a liquidation of collateral and the enforcement of guarantees would be sufficient to cover the potential amount of future payments required under the corresponding guarantees. The Company leases land and leasehold improvements under agreements that expire in various years with renewal options over the next 30 years. Rental expense, included in building occupancy expense, amounted to $166,000 for 2017 and $149,000 for 2016. Approximate minimum rental commitments for non-cancelable operating leases are as follows: Years Ending December 31: (In thousands) 2018 203 2019 184 2020 170 2021 145 2022 136 Thereafter 301 Total minimum lease payments $ 1,139

Dividends and Restrictions

Dividends and Restrictions	12 Months Ended
	Dec. 31, 2017
Disclosure Of Restrictions On Dividends Loans And Advances Disclosure [Abstract]
DIVIDENDS AND RESTRICTIONS	NOTE 19: Dividends and Restrictions The Company's ability to pay dividends to its shareholders is largely dependent on the Bank's ability to pay dividends to the Company. In addition to state law requirements and the capital requirements discussed in Note 20, federal statutes, regulations and policies limit the circumstances under which the Bank may pay dividends. The amount of retained earnings legally available under these regulations approximated $11.6 million as of December 31, 2017. Dividends paid by the Bank to the Company would be prohibited if the effect thereof would cause the Bank’s capital to be reduced below applicable minimum capital requirements. The Bank made no dividend payments to the Company in the years ended December 31, 2017, December 31, 2016 or December 31, 2015. Capital adequacy is evaluated primarily by the use of ratios which measure capital against total assets, as well as against total assets that are weighted based on defined risk characteristics. The Company’s goal is to maintain a strong capital position, consistent with the risk profile of its banking operations. This strong capital position serves to support growth and expansion activities while at the same time exceeding regulatory standards. At December 31, 2017, the Bank met the regulatory definition of a “well-capitalized” institution, i.e. a leverage capital ratio exceeding 5%, a Tier 1 risk-based capital ratio exceeding 8%, Tier 1 common equity exceeding 6.5%, and a total risk-based capital ratio exceeding 10%. In addition to establishing the minimum regulatory capital requirements, the regulations limit capital distributions and certain discretionary bonus payments to management if the institution does not hold a “capital conservation buffer” consisting of 2.5% of common equity Tier 1 capital to risk-weighted assets above the amount necessary to meet its minimum risk-based capital requirements. The buffer is separate from the capital ratios required under the

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2017
Regulatory Capital Requirements [Abstract]
REGULATORY MATTERS	NOTE 20: Regulatory Matters The Bank is subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of its assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain amounts and ratios (set forth in the table below) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). As of December 31, 2017, the Bank’s most recent notification from the Federal Deposit Insurance Corporation categorized the Bank as “well-capitalized”, under the regulatory framework for prompt corrective action. To be categorized as “well-capitalized”, the Bank must maintain total risk-based, Tier 1 risk-based and Tier 1 leverage ratios as set forth in the tables below. There are no conditions or events since that notification that management believes have changed the Bank’s category. As noted above, the regulations also impose a “capital conservation buffer” consisting of 2.5% of common equity Tier 1 capital to risk-weighted assets above the amount necessary to meet its minimum risk-based capital requirements. The buffer is separate from the capital ratios required under the The Bank’s actual capital amounts and ratios as of December 31, 2017 and 2016 are presented in the following table. Actual Minimum For Capital Adequacy Purposes Minimum To Be "Well-Capitalized" Under Prompt Corrective Provisions Well-Capitalized With Buffer, Fully Phased In 2019 (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of December 31, 2017: Total Core Capital (to Risk-Weighted Assets) $ 78,105 13.97 % $ 44,733 8.00 % $ 55,916 10.00 % $ 58,712 10.50 % Tier 1 Capital (to Risk-Weighted Assets) $ 71,114 12.72 % $ 33,550 6.00 % $ 44,733 8.00 % $ 47,529 8.50 % Tier 1 Common Equity (to Risk-Weighted Assets) $ 71,114 12.72 % $ 25,162 4.50 % $ 36,345 6.50 % $ 39,141 7.00 % Tier 1 Capital (to Assets) $ 71,114 8.16 % $ 34,863 4.00 % $ 43,579 5.00 % $ 43,579 5.00 % As of December 31, 2016: Total Core Capital (to Risk-Weighted Assets) $ 72,098 14.79 % $ 38,996 8.00 % $ 48,745 10.00 % $ 51,182 10.50 % Tier 1 Capital (to Risk-Weighted Assets) $ 66,003 13.54 % $ 29,247 6.00 % $ 38,996 8.00 % $ 41,433 8.50 % Tier 1 Common Equity (to Risk-Weighted Assets) $ 66,003 13.54 % $ 21,935 4.50 % $ 31,684 6.50 % $ 34,121 7.00 % Tier 1 Capital (to Assets) $ 66,003 9.06 % $ 29,154 4.00 % $ 36,443 5.00 % $ 36,443 5.00 % On September 1, 2011, the Company entered into a Securities Purchase Agreement with the Secretary of the Treasury (“Treasury”) pursuant to which the Company sold to the Treasury, 13,000 shares of its Senior Non-Cumulative Perpetual Preferred Stock, Series B (“Series B Preferred Stock”), having a liquidation preference of $1,000 per share for aggregate proceeds of $13.0 million. This transaction was entered into as part of the SBLF. The Series B Preferred Stock was entitled to receive non-cumulative dividends payable quarterly, on each January 1, April 1, July 1 and October 1, beginning October 1, 2011. The dividend rate, which was calculated on the aggregate liquidation amount, was initially set at 4.2% per annum based upon the level of “Qualified Small Business Lending,” or “QSBL” (as defined in the Securities Purchase Agreement) by Pathfinder Bank. The dividend rate for dividend periods subsequent to the initial period was set based upon the “Percentage Change in Qualified Lending” (as defined in the Securities Purchase Agreement) between each dividend period and the “Baseline” QSBL level. In general, the dividend rate decreased as the level of Pathfinder Bank’s QSBL increased. Our dividend rate as of December 31, 2015 was 1.0%. Such dividends were not cumulative, but we could only declare and pay dividends on our common stock (or any other equity securities junior to the Series B Preferred Stock) if we have declared and paid dividends for the current dividend period on the Series B Preferred Stock. We were also subject to other restrictions on our ability to repurchase or redeem other securities. The Company had the right to redeem the shares of Series B Preferred Stock, in whole or in part, at any time at a redemption price equal to the sum of the liquidation amount per share and the per-share amount of any unpaid dividends for the then-current period, subject to any required prior approval by its primary federal regulator. On February 16, 2016, the Company redeemed all 13,000 shares of the Series B Preferred Stock outstanding with the payment of $13.0 million to the SBLF. This redemption was substantially financed by the issuance of the $10 million Subordinated Loan on October 15, 2015. The issuance of the Subordinated Loan increased interest expense by $644,000 per year but prospectively reduced the amount payable to the SBLF in preferred stock dividends. Effective April 1, 2016, the annual dividend rate for the preferred stock would have been 9.0%. The retirement of the $13.0 million of the SBLF Preferred Series B stock, therefore resulted in an annual reduction of preferred dividends payable of $1.2 million. The Company paid $0 and $16,000 in preferred dividends in 2017 and 2016, respectively. These transactions had no effect on the regulatory capital position of the Bank. The Company’s goal is to maintain a strong capital position, consistent with the risk profile of its subsidiary banks that supports growth and expansion activities while at the same time exceeding regulatory standards. At December 31, 2017, the Bank exceeded all regulatory required minimum capital ratios and met the regulatory definition of a “well-capitalized” institution, i.e. a leverage capital ratio exceeding 5%, a Tier 1 risk-based capital ratio exceeding 6% and a total risk-based capital ratio exceeding 10%. The Bank is required to maintain average balances on hand or with the Federal Reserve Bank. At December 31, 2017 and 2016, these reserve balances amounted to $6.3 million and $13.2 million, respectively and are included in cash and due from banks in the statement of condition.

Interest Rate Derivative

Interest Rate Derivative	12 Months Ended
	Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
INTEREST RATE DERIVATIVE	NOTE 21: INTEREST RATE DERIVATIVE Derivative instruments are entered into primarily as a risk management tool of the Company. Financial derivatives are recorded at fair value as other liabilities. The accounting for changes in the fair value of a derivative depends on whether it has been designated and qualifies as part of a hedging relationship. For a fair value hedge, changes in the fair value of the derivative instrument and changes in the fair value of the hedged asset or liability are recognized currently in earnings. For a cash flow hedge, changes in the fair value of the derivative instrument, to the extent that it is effective, are recorded in other comprehensive income and subsequently reclassified to earnings as the hedged transaction impacts net income. Any ineffective portion of a cash flow hedge is recognized currently in earnings. See Note 22 for further discussion of the fair value of the interest rate derivative. The Company has $5.0 million of floating rate trust preferred debt indexed to 3-month LIBOR. As a result, it is exposed to variability in cash flows related to changes in projected interest payments caused by changes in the benchmark interest rate. During the fourth quarter of fiscal 2009, the Company entered into an interest rate swap agreement, with a $2.0 million notional amount, to convert a portion of the floating rate trust preferred debt to a fixed rate for a term of approximately seven years at a rate of 4.96%. This swap agreement expired in the second quarter of 2016 and was not renewed. The derivative, while in effect, was designated as a cash flow hedge. The hedging strategy ensured that changes in cash flows from the derivative would have been highly effective at offsetting changes in interest expense from the hedged exposure. On five occasions during 2017, the Company sold, and subsequently repurchased, U.S. Treasury securities in the approximate amount of $40.0 million for each transaction. These transactions were intended to act as hedges against rising short-term interest rates. The Company was in controlling possession of, but did not own, the securities at the time of each sale. The securities had been received by the Company, under industry-standard repurchase agreements, from an unrelated third party as collateral for a series of 30-day loans of approximately $40.0 million on each occasion which were made at market rates of interest to that third party. The security sale on each occasion provided the funds necessary to advance the loan to the third party and placed the Company in what is generally described as a “short position” with respect to the sold U.S. Treasury securities. These transactions acted as a hedge against rising short-term interest rates because the price of each sold security would be expected to decline in a rising short-term interest rate environment and could therefore be re-acquired at the conclusion of each 30-day loan period at a price lower than the price at which the securities were originally sold. Short-term generally rates rose over the combined duration of these transactions and, consequently, the Company recognized aggregate gains on the sale and repurchase of the securities in the amounts of $428,000 in 2017. The transactions’ gains were characterized as capital gains for tax purposes. On one occasion during 2016, the Company sold, and subsequently repurchased, a U.S. Treasury securities in the approximate amount of $25.0 million. This transaction was intended to act as a hedge against rising short-term interest rates. The security was received by the Company, under an industry-standard repurchase agreement, from an unrelated third party as collateral for a 30-day loan of approximately $25.0 million which was made at zero interest to that third party. Short-term rates rose over the duration of this transaction and, consequently, the Company recognized a gain on the sale and repurchase of the security in the amounts of $85,000 and a related tax benefit of $34,000 in 2016. All hedging transactions were closed at December 31, 2017 and 2016 and had no effect on the Company’s consolidated financial position on those dates with the exception of deferred fees for consulting services related to the transactions in the amount of $53,000 at December 31, 2016. These deferred fees were recognized in other assets at December 31, 2016 and as a component of interest expense in 2017.

Fair Value Measurements and Dis

Fair Value Measurements and Disclosures	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS AND DISCLOSURES	NOTE 22: Fair Value MEASUREMENTS AND DISCLOSURES Accounting guidance related to fair value measurements and disclosures specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs have created the following fair value hierarchy: Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. Level 2 – Quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 3 – Model-derived valuations in which one or more significant inputs or significant value drivers are unobservable. An asset’s or liability’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs, minimize the use of unobservable inputs, to the extent possible, and considers counterparty credit risk in its assessment of fair value. The Company used the following methods and significant assumptions to estimate fair value: Investment securities: The fair values of securities available-for-sale are obtained from an independent third party and are based on quoted prices on nationally recognized securities exchanges where available (Level 1). If quoted prices are not available, fair values are measured by utilizing matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2). Management made no adjustment to the fair value quotes that were received from the independent third party pricing service. Level 3 securities are assets whose fair value cannot be determined by using observable measures, such as market prices or pricing models. Level 3 assets are typically very illiquid, and fair values can only be calculated using estimates or risk-adjusted value ranges. Management applies known factors, such as currently applicable discount rates, to the valuation of those investments in order to determine fair value at the reporting date. Interest rate swap derivative: The fair value of the interest rate swap derivative is obtained from a third party pricing agent and is calculated based on a discounted cash flow model. All future floating cash flows are projected and both floating and fixed cash flows are discounted to the valuation date. The curve utilized for discounting and projecting is built by obtaining publicly available third party market quotes for various swap maturity terms, and therefore is classified within Level 2 of the fair value hierarchy. The swap agreement presented in the accompanying financial statements expired in the second quarter of 2016 and was not renewed. Impaired loans: Impaired loans are those loans in which the Company has measured impairment based on the fair value of the loan’s collateral or the discounted value of expected future cash flows. Fair value is generally determined based upon market value evaluations by third parties of the properties and/or estimates by management of working capital collateral or discounted cash flows based upon expected proceeds. These appraisals may include up to three approaches to value: the sales comparison approach, the income approach (for income-producing property), and the cost approach. Management modifies the appraised values, if needed, to take into account recent developments in the market or other factors, such as, changes in absorption rates or market conditions from the time of valuation and anticipated sales values considering management’s plans for disposition. Such modifications to the appraised values could result in lower valuations of such collateral. Estimated costs to sell are based on current amounts of disposal costs for similar assets. These measurements are classified as Level 3 within the valuation hierarchy. Impaired loans are subject to nonrecurring fair value adjustment upon initial recognition or subsequent impairment. A portion of the allowance for loan losses is allocated to impaired loans if the value of such loans is deemed to be less than the unpaid balance. Foreclosed real estate: Fair values for foreclosed real estate are initially recorded based on market value evaluations by third parties, less costs to sell (“initial cost basis”). Any write-downs required when the related loan receivable is exchanged for the underlying real estate collateral at the time of transfer to foreclosed real estate are charged to the allowance for loan losses. Values are derived from appraisals, similar to impaired loans, of underlying collateral or discounted cash flow analysis. Subsequent to foreclosure, valuations are updated periodically and assets are marked to current fair value, not to exceed the initial cost basis. In the determination of fair value subsequent to foreclosure, management also considers other factors or recent developments, such as, changes in absorption rates and market conditions from the time of valuation and anticipated sales values considering management’s plans for disposition. Either change could result in adjustment to lower the property value estimates indicated in the appraisals. These measurements are classified as Level 3 within the fair value hierarchy. The following tables summarize assets measured at fair value on a recurring basis as of December 31, segregated by the level of valuation inputs within the hierarchy utilized to measure fair value: December 31, 2017 Total Fair (In thousands) Level 1 Level 2 Level 3 Value Available-for-Sale Portfolio Debt investment securities: US Treasury, agencies and GSEs $ - $ 41,336 $ - $ 41,336 State and political subdivisions - 13,681 - 13,681 Corporate - 8,600 - 8,600 Asset backed securities - 6,644 - 6,644 Residential mortgage-backed - US agency - 35,742 - 35,742 Collateralized mortgage obligations - US agency - 53,348 - 53,348 Collateralized mortgage obligations - Private label - 11,052 - 11,052 Equity investment securities: Common stock - Financial services industry - 220 515 735 Total available-for-sale securities $ - $ 170,623 $ 515 $ 171,138 December 31, 2016 Total Fair (In thousands) Level 1 Level 2 Level 3 Value Available-for-Sale Portfolio Debt investment securities: US Treasury, agencies and GSEs $ - $ 24,184 $ - $ 24,184 State and political subdivisions - 16,481 - 16,481 Corporate - 15,195 - 15,195 Asset backed securities - 6,664 - 6,664 Residential mortgage-backed - US agency - 30,566 - 30,566 Collateralized mortgage obligations - US agency - 40,986 - 40,986 Collateralized mortgage obligations - Private label - 6,577 - 6,577 Equity investment securities: Mutual funds: Ultra short mortgage fund 626 - - 626 Common stock - Financial services industry - 220 456 676 Total available-for-sale securities $ 626 $ 140,873 $ 456 $ 141,955 The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis as of December 31 were as follows: (In thousands) Common Stock - Financial Services Industry Balance - December 31, 2016 $ 456 Total gains realized/unrealized: Included in earnings - Included in other comprehensive income 59 Settlements - Sales - Balance - December 31, 2017 $ 515 Changes in unrealized gains included in earnings related to assets still held at December 31, 2017 - The following table summarizes the valuation techniques and significant unobservable inputs used for the Company's investments that are categorized within Level 3 of the fair value hierarchy at the indicated dates: (In thousands) At December 31, 2017 Investment Type Fair Value Valuation Techniques Unobservable Input Weight Common Stock - Financial Services Industry $ 515 Inputs to comparables Weight 100% (In thousands) At December 31, 2016 Investment Type Fair Value Valuation Techniques Unobservable Input Weight Common Stock - Financial Services Industry $ 456 Inputs to comparables Weight ascribed to comparable companies 100% Certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following tables summarize assets measured at fair value on a nonrecurring basis as of December 31, segregated by the level of valuation inputs within the hierarchy utilized to measure fair value: December 31, 2017 Total Fair (In thousands) Level 1 Level 2 Level 3 Value Impaired loans $ - $ - $ 4,887 $ 4,887 Foreclosed real estate $ - $ - $ 434 $ 434 December 31, 2016 Total Fair (In thousands) Level 1 Level 2 Level 3 Value Impaired loans $ - $ - $ 4,049 $ 4,049 Foreclosed real estate $ - $ - $ 393 $ 393 The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which Level 3 inputs were used to determine fair value. Quantitative Information about Level 3 Fair Value Measurements Valuation Unobservable Range Techniques Input (Weighted Avg.) At December 31, 2017 Impaired loans Appraisal of collateral Appraisal Adjustments 5% - 30% (9%) (Sales Approach) Costs to Sell 7% - 13% (11%) Discounted Cash Flow Foreclosed real estate Appraisal of collateral Appraisal Adjustments 15% - 15% (15%) (Sales Approach) Costs to Sell 6% - 8% (7%) Quantitative Information about Level 3 Fair Value Measurements Valuation Unobservable Range Techniques Input (Weighted Avg.) At December 31, 2016 Impaired loans Appraisal of collateral Appraisal Adjustments 5% - 10% (5%) (Sales Approach) Costs to Sell 8% - 13% (10%) Discounted Cash Flow Foreclosed real estate Appraisal of collateral Appraisal Adjustments 15% - 15% (15%) (Sales Approach) Costs to Sell 6% - 8% (7%) Required disclosures include fair value information of financial instruments, whether or not recognized in the consolidated statement of condition, for which it is practicable to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instrument. The Company has various processes and controls in place to ensure that fair value is reasonably estimated. The Company performs due diligence procedures over third-party pricing service providers in order to support their use in the valuation process. While the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Management uses its best judgment in estimating the fair value of the Company’s financial instruments; however, there are inherent weaknesses in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates herein are not necessarily indicative of the amounts the Company could have realized in a sales transaction on the dates indicated. The estimated fair value amounts have been measured as of their respective period-ends, and have not been re-evaluated or updated for purposes of these financial statements subsequent to those respective dates. As such, the estimated fair values of these financial instruments subsequent to the respective reporting dates may be different than the amounts reported at each period-end. The following information should not be interpreted as an estimate of the fair value of the entire Company since a fair value calculation is only provided for a limited portion of the Company’s assets and liabilities. Due to a wide range of valuation techniques and the degree of subjectivity used in making the estimates, comparisons between the Company’s disclosures and those of other companies may not be meaningful. The Company, in estimating its fair value disclosures for financial instruments, used the following methods and assumptions: Cash and cash equivalents – The carrying amounts of these assets approximate their fair value and are classified as Level 1. Interest earning time deposits – The carrying amounts of these assets approximate their fair value and are classified as Level 1. Investment securities – The fair values of securities available-for-sale and held-to-maturity are obtained from an independent third party and are based on quoted prices on nationally recognized exchange where available (Level 1). If quoted prices are not available, fair values are measured by utilizing matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for specific securities, but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2). Management made no adjustment to the fair value quotes that were received from the independent third party pricing service. Level 3 securities are assets whose fair value cannot be determined by using observable measures, such as market prices or pricing models. Level 3 assets are typically very illiquid, and fair values can only be calculated using estimates or risk-adjusted value ranges. Management applies known factors, such as currently applicable discount rates, to the valuation of those investments in order to determine fair value at the reporting date. Federal Home Loan Bank stock – The carrying amount of these assets approximates their fair value and are classified as Level 2. Net loans – For variable-rate loans that re-price frequently, fair value is based on carrying amounts. The fair value of other loans (for example, fixed-rate commercial real estate loans, mortgage loans, and commercial and industrial loans) is estimated using discounted cash flow analysis, based on interest rates currently being offered in the market for loans with similar terms to borrowers of similar credit quality. Loan value estimates include judgments based on expected prepayment rates. The measurement of the fair value of loans, including impaired loans, is classified within Level 3 of the fair value hierarchy. Accrued interest receivable and payable – The carrying amount of these assets approximates their fair value and are classified as Level 1. Deposits – The fair values disclosed for demand deposits (e.g., interest-bearing and noninterest-bearing checking, passbook savings and certain types of money management accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts) and are classified within Level 1 of the fair value hierarchy. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered in the market on certificates of deposits to a schedule of aggregated expected monthly maturities on time deposits. Measurements of the fair value of time deposits are classified within Level 2 of the fair value hierarchy. Borrowings – Fixed/variable term “bullet” structures are valued using a replacement cost of funds approach. These borrowings are discounted to the FHLBNY advance curve. Option structured borrowings’ fair values are determined by the FHLB for borrowings that include a call or conversion option. If market pricing is not available from this source, current market indications from the FHLBNY are obtained and the borrowings are discounted to the FHLBNY advance curve less an appropriate spread to adjust for the option. These measurements are classified as Level 2 within the fair value hierarchy. Subordinated Loans – The Company secures quotes from its pricing service based on a discounted cash flow methodology or utilizes observations of recent highly-similar transactions which result in a Level 2 classification. Interest rate swap derivative – The fair value of the interest rate swap derivative is obtained from a third party pricing agent and is calculated based on a discounted cash flow model. All future floating cash flows are projected and both floating and fixed cash flows are discounted to the valuation date. The curve utilized for discounting and projecting is built by obtaining publicly available third party market quotes for various swap maturity terms, and therefore is classified within Level 2 of the fair value hierarchy. The swap agreement presented in the accompanying financial statements expired in the second quarter of 2016 and was not renewed. The carrying amounts and fair values of the Company’s financial instruments as of December 31 are presented in the following table: December 31, 2017 December 31, 2016 Fair Value Carrying Estimated Carrying Estimated (In thousands) Hierarchy Amounts Fair Values Amounts Fair Values Financial assets: Cash and cash equivalents 1 $ 21,991 $ 21,991 $ 22,419 $ 22,419 Investment securities - available-for-sale 1 - - 626 626 Investment securities - available-for-sale 2 170,623 170,623 140,873 140,873 Investment securities - available-for-sale 3 515 515 456 456 Investment securities - held-to-maturity 2 66,196 66,426 54,645 54,429 Federal Home Loan Bank stock 2 3,855 3,855 3,250 3,250 Net loans 3 573,705 570,439 485,900 484,704 Accrued interest receivable 1 3,047 3,047 2,532 2,532 Financial liabilities: Demand Deposits, Savings, NOW and MMDA 1 $ 510,176 $ 510,176 $ 421,627 $ 421,627 Time Deposits 2 213,427 212,453 189,356 189,197 Borrowings 2 73,888 73,575 58,947 58,918 Subordinated loans 2 15,059 14,953 15,025 14,310 Accrued interest payable 1 186 186 75 75

Parent Company - Financial Info

Parent Company - Financial Information	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
PARENT COMPANY – FINANCIAL INFORMATION	NOTE 23: Parent Company – Financial Information The following represents the condensed financial information of Pathfinder Bancorp, Inc. as of and for the years ended December 31: Statements of Condition 2017 2016 (In thousands) Assets Cash $ 5,004 $ 5,424 Investments 515 455 Investment in bank subsidiary 71,883 67,281 Investment in non-bank subsidiary 155 155 Other assets 117 475 Total assets $ 77,674 $ 73,790 Liabilities and Shareholders' Equity Accrued liabilities $ 471 $ 404 Subordinated loans 15,059 15,025 Shareholders' equity 62,144 58,361 Total liabilities and shareholders' equity $ 77,674 $ 73,790 Statements of Income 2017 2016 (In thousands) Income Dividends from non-bank subsidiary $ 4 $ 4 Realized gains on available-for sale investment securities 428 108 Operating, net 15 - Total income 447 112 Expenses Interest 1,371 880 Operating, net 169 230 Total expenses 1,540 1,110 Loss before taxes and equity in undistributed net income of subsidiaries (1,093 ) (998 ) Tax benefit 262 254 Loss before equity in undistributed net income of subsidiaries (831 ) (744 ) Equity in undistributed net income of subsidiaries 4,322 4,016 Net income $ 3,491 $ 3,272 Statements of Cash Flows 2017 2016 (In thousands) Operating Activities Net Income $ 3,491 $ 3,272 Equity in undistributed net income of subsidiaries (4,322 ) (4,016 ) Realized gains on available-for-sale investment securities - (23 ) Stock based compensation and ESOP expense 712 557 Amortization of deferred financing from subordinated loan 34 34 Net change in other assets and liabilities 822 (152 ) Net cash flows from operating activities 737 (328 ) Investing Activities Purchase investments - (130 ) Net gain on hedging transaction (428 ) (85 ) Proceeds from sale of investment - 43 Net cash flows from investing activities (428 ) (172 ) Financing activities Redemption of preferred stock - SBLF - (13,000 ) Proceeds from exercise of stock options 155 143 Purchase of common stock - (1,755 ) Cash dividends paid to preferred shareholders - (16 ) Cash dividends paid to common shareholders (884 ) (866 ) Net cash flows from financing activities (729 ) (15,494 ) Change in cash and cash equivalents (420 ) (15,994 ) Cash and cash equivalents at beginning of year 5,424 21,418 Cash and cash equivalents at end of year $ 5,004 $ 5,424

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	NOTE 24: RELATED PARTY TRANSACTIONS In the ordinary course of business, the Company has granted loans to certain directors, executive officers and their affiliates (collectively referred to as “related parties”). These loans were made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other unaffiliated parties and do not involve more than normal risk of collectability. The following represents the activity associated with loans to related parties during the year ended December 31, 2017: (In thousands) Balance at the beginning of the year $ 10,884 Originations and Officer additions 2,287 Principal payments (3,899 ) Balance at the end of the year $ 9,272 Deposits of related parties at December 31, 2017 and December 31, 2016 were $3.2 million and $3.4 million, respectively.

Conversion and Reorganization

Conversion and Reorganization	12 Months Ended
	Dec. 31, 2017
Conversion And Reorganization [Abstract]
CONVERSION AND REORGANIZATION	NOTE 25: CONVERSION AND REORGANIZATION On October 16, 2014, the former Pathfinder Bancorp (“former Pathfinder”) completed the conversion and reorganization pursuant to which Pathfinder Bancorp, MHC converted to the stock holding company form of organization under a “second step” conversion (the “Conversion”), and the Bank reorganized from the two-tier mutual holding company structure to the stock holding company structure. Prior to the completion of the Conversion, the MHC owned approximately 60.4% of the common stock of the Company. The Company, the new stock holding company for Pathfinder Bank, sold 2,636,053 shares of common stock at $10.00 per share, for gross offering proceeds of $26.4 million in its stock offering. In addition, $197,000 in cash was received by the Company from the MHC upon it ceasing to exist. Concurrent with the completion of the offering, shares of common stock of the Company owned by the public were exchanged for shares of the Company’s common stock so that the shareholders now own approximately the same percentage of the Company’s common stock as they owned of the former Pathfinder’s common stock immediately prior to the Conversion. Shareholders of the former Pathfinder received 1.6472 shares of the Company’s common stock for each share of the former Pathfinder’s common stock that they owned immediately prior to completion of the transaction. As a result of the offering and the exchange of shares, the Company had 4,353,850 shares outstanding at December 31, 2014. The Company has 4,236,744 and 4,280,227 shares outstanding at December 31, 2016 and December 31, 2017, respectively. The Conversion was accounted for as a change in corporate form with no resulting change in the historical basis of the Company’s assets, liabilities, and equity. Costs related to the offering were primarily marketing fees paid to the Company’s investment banking firm, legal and professional fees, registration fees, printing and mailing costs and totaled $1.5 million. Accordingly, net proceeds were $24.9 million. In addition, as part of the Conversion and dissolution of the MHC, the Company received $197,000 of cash previously held by the MHC. As a result of the Conversion and Offering, Pathfinder Bancorp, Inc., a federal corporation, was succeeded by a new fully public Maryland corporation with the same name and the MHC ceased to exist. The shares of common stock sold in the offering and issued began trading on the NASDAQ Capital Market on October 17, 2014 under the trading symbol “PBHC.” In accordance with Board of Governors of the Federal Reserve System regulations, at the time of the reorganization, the Company substantially restricted retained earnings by establishing a liquidation account. The liquidation account will be maintained for the benefit of eligible account holders who continue to maintain their accounts at the Bank after conversion. The Bank will establish a parallel liquidation account to support the Company’s liquidation account in the event the Company does not have sufficient assets to fund its obligations under its liquidation account. The liquidation accounts will be reduced annually to the extent that eligible account holders have reduced their qualifying deposits. Subsequent increases will not restore an eligible account holder’s interest in the liquidation accounts. In the event of a complete liquidation of the Bank or the Company, each account holder will be entitled to receive a distribution in an amount proportionate to the adjusted qualifying account balances then held. The Bank may not pay dividends if those dividends would reduce equity capital below the required liquidation account amount.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2017
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	NOTE 26: ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Changes in the components of accumulated other comprehensive income (loss) (“AOCI”), net of tax, for the periods indicated are summarized in the table below. For the years ended December 31, 2017 (In thousands) Retirement Plans Unrealized Gains and Losses on Financial Derivative Unrealized Gains and Losses on Available-for- Sale Securities Unrealized Loss on Securities Transferred to Held-to- Maturity Total Beginning balance $ (1,513 ) $ - $ (1,845 ) $ (464 ) $ (3,822 ) Other comprehensive income before reclassifications (379 ) - 872 115 608 Amounts reclassified from AOCI 89 - (293 ) - (204 ) Reclassification of effect of tax rate change (1) (417 ) - (292 ) (81 ) (790 ) Ending balance $ (2,220 ) $ - $ (1,558 ) $ (430 ) $ (4,208 ) (1) Reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the newly enacted Federal corporate income tax rate reduction from 34% to 21%. For the years ended December 31, 2016 (In thousands) Retirement Plans Unrealized Gains and Losses on Financial Derivative Unrealized Gains and Losses on Available-for- Sale Securities Unrealized Loss on Securities Transferred to Held-to- Maturity Total Beginning balance $ (1,844 ) $ (16 ) $ (51 ) $ (654 ) (2,565 ) Other comprehensive income before reclassifications 198 1 (1,436 ) 190 (1,047 ) Amounts reclassified from AOCI 133 15 (358 ) - (210 ) Ending balance $ (1,513 ) $ - $ (1,845 ) $ (464 ) $ (3,822 ) The following table presents the amounts reclassified out of each component of AOCI for the indicated annual period: (In thousands) For the years ended Details about AOCI 1 December 31, 2017 December 31, 2016 Affected Line Item in the Statement of Income Unrealized holding gain on financial derivative: Reclassification adjustment for interest expense included in net income $ - $ (25 ) Interest on long term borrowings - 10 Provision for income taxes $ - $ (15 ) Net Income Retirement plan items Retirement plan net losses recognized in plan expenses 2 $ (150 ) $ (222 ) Salaries and employee benefits 61 89 Provision for income taxes $ (89 ) $ (133 ) Net Income Available-for-sale securities Realized gain on sale of securities $ 489 $ 594 Net gains on sales and redemptions of investment securities (196 ) (236 ) Provision for income taxes $ 293 $ 358 Net Income

Summary of Significant Accoun35

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations The accompanying consolidated financial statements include the accounts of Pathfinder Bancorp, Inc. (the “Company”) and its wholly owned subsidiary, Pathfinder Bank (the “Bank”). The Company is a Maryland corporation headquartered in Oswego, New York. On October 16, 2014, the Company completed its conversion from the mutual holding company structure and the related public offering and is now a stock holding company that is fully owned by the public. As a result of the conversion, the mutual holding company and former mid-tier holding company were merged into Pathfinder Bancorp, Inc. The primary business of the Company is its investment in Pathfinder Bank (the "Bank") which is 100% owned by the Company. The Company sold 2,636,053 shares of common stock in the offering, including 105,442 shares sold to the Pathfinder Bank employee stock ownership plan (“ESOP”). All shares were sold at a price of $10.00 per share raising $26.4 million in gross proceeds. Additionally, $197,000 in cash was received from the merger of MHC into the company; and after accounting for conversion related expenses of $1.5 million, the Company received $24.9 million in net proceeds. Concurrent with the completion of the offering, publicly owned shares of Pathfinder Bancorp, Inc., a federal corporation, were exchanged for 1.6472 shares of the Company’s common stock. At December 31, 2017, 4,280,227 shares of common stock were outstanding. The Bank has two wholly owned operating subsidiaries, Pathfinder Risk Management Company, Inc. (“PRMC”) and Whispering Oaks Development Corp. All significant inter-company accounts and activity have been eliminated in consolidation. Although the Company owns, through its subsidiary PRMC, 51% of the membership interest in FitzGibbons Agency, LLC (“FitzGibbons”), the Company is required to consolidate 100% of FitzGibbons within the consolidated financial statements. The 49% of which the Company does not own is accounted for separately as noncontrolling interests within the consolidated financial statements. The Company has seven branch offices located in Oswego County and two branch offices in Onondaga County and one loan production office in Oneida County. The Company is primarily engaged in the business of attracting deposits from the general public in the Company’s market area, and investing such deposits, together with other sources of funds, in loans secured by commercial real estate, business assets, one-to-four family residential real estate and investment securities.
Use of Estimates in the Preparation of Consolidated Financial Statements	Use of Estimates in the Preparation of Consolidated Financial Statements The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Management has identified the allowance for loan losses, deferred income taxes, pension obligations, the annual evaluation of the Company’s goodwill for possible impairment and the evaluation of investment securities for other than temporary impairment and the estimation of fair values for accounting and disclosure purposes to be the accounting areas that require the most subjective and complex judgments, and as such, could be the most subject to revision as new information becomes available. The Company is subject to the regulations of various governmental agencies. The Company also undergoes periodic examinations by the regulatory agencies which may subject it to further changes with respect to asset valuations, amounts of required loss allowances, and operating restrictions resulting from the regulators' judgments based on information available to them at the time of their examinations.
Significant Group Concentrations of Credit Risk	Significant Group Concentrations of Credit Risk Most of the Company’s activities are with customers located primarily in Oswego and Onondaga counties of New York State. A large portion of the Company’s portfolio is centered in residential and commercial real estate. The Company closely monitors real estate collateral values and requires additional reviews of commercial real estate appraisals by a qualified third party for commercial real estate loans in excess of $400,000. All residential loan appraisals are reviewed by an individual or third party who is independent of the loan origination or approval process and was not involved in the approval of appraisers or selection of the appraiser for the transaction, and has no direct or indirect interest, financial or otherwise in the property or the transaction.
Advertising	Advertising The Company follows the policy of charging the costs of advertising to expense as incurred.
Noncontrolling Interest	Noncontrolling Interest Noncontrolling interest represents the portion of ownership and profit or loss that is attributable to the minority owners of the FitzGibbons Agency.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash on hand, amounts due from banks and interest-bearing deposits (with original maturity of three months or less).
Investment Securities	Investment Securities The Company classifies investment securities as either available-for-sale or held-to-maturity. The Company does not hold any securities considered to be trading. Available-for-sale securities are reported at fair value, with net unrealized gains and losses reflected as a separate component of shareholders’ equity, net of the applicable income tax effect. Held-to-maturity securities are those that the Company has the ability and intent to hold until maturity and are reported at amortized cost. Gains or losses on investment security transactions are based on the amortized cost of the specific securities sold. Premiums and discounts on securities are amortized and accreted into income using the interest method over the period to maturity. Note 4 to the consolidated financial statements includes additional information about the Company’s accounting policies with respect to the impairment of investment securities.
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock Federal law requires a member institution of the Federal Home Loan Bank (“FHLB”) system to hold stock of its district FHLB according to a predetermined formula. The stock is carried at cost.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets, including sales of loans and loan participations, are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Loans	Loans The Company grants mortgage, commercial, municipal, and consumer loans to customers. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are stated at their outstanding unpaid principal balances, less the allowance for loan losses plus net deferred loan origination costs. The ability of the Company’s debtors to honor their contracts is dependent upon the real estate and general economic conditions in the market area. Interest income is generally recognized when income is earned using the interest method. Nonrefundable loan fees received and related direct origination costs incurred are deferred and amortized over the life of the loan using the interest method, resulting in a constant effective yield over the loan term. Deferred fees are recognized into income and deferred costs are charged to income immediately upon prepayment of the related loan. The loans receivable portfolio is segmented into residential mortgage, commercial and consumer loans. The residential mortgage segment consists of one-to-four family first-lien residential mortgages and construction loans. Commercial loans consist of the following classes: real estate, lines of credit, other commercial and industrial, and tax-exempt loans. Consumer loans include both home equity lines of credit and loans with junior liens and other consumer loans.
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses represents management’s estimate of losses inherent in the loan portfolio as of the date of the statement of condition and it is recorded as a reduction of loans. The allowance is increased by the provision for loan losses, and decreased by charge-offs, net of recoveries. Loans deemed to be uncollectible are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance. All, or part, of the principal balance of loans receivable are charged off to the allowance as soon as it is determined that the repayment of all, or part, of the principal balance is highly unlikely. Non-residential consumer loans are generally charged off no later than 120 days past due on a contractual basis, unless productive collection efforts are providing results. Consumer loans may be charged off earlier in the event of bankruptcy, or if there is an amount that is deemed uncollectible. No portion of the allowance for loan losses is restricted to any individual loan product and the entire allowance is available to absorb any and all loan losses. The allowance for loan losses is maintained at a level considered adequate to provide for losses that can be reasonably anticipated. Management performs a quarterly evaluation of the adequacy of the allowance. The allowance is based on three major components which are; specific components for larger loans, recent historical losses and several qualitative factors applied to a general pool of loans, and an unallocated component. The first component is the specific component that relates to loans that are classified as impaired. For these loans, an allowance is established when the discounted cash flows or collateral value of the impaired loan is lower than the carrying value of that loan. The second or general component covers pools of loans, by loan class, not considered impaired, smaller balance homogeneous loans, such as residential real estate, home equity and other consumer loans. These pools of loans are evaluated for loss exposure first based on historical loss rates for each of these categories of loans. The ratio of net charge-offs to loans outstanding within each product class, over the most recent eight quarters, lagged by one quarter, is used to generate the historical loss rates. In addition, qualitative factors are added to the historical loss rates in arriving at the total allowance for loan loss need for this general pool of loans. The qualitative factors include changes in national and local economic trends, the rate of growth in the portfolio, trends of delinquencies and nonaccrual balances, changes in loan policy, and changes in lending management experience and related staffing. Each factor is assigned a value to reflect improving, stable or declining conditions based on management’s best judgment using relevant information available at the time of the evaluation. These qualitative factors, applied to each product class, make the evaluation inherently subjective, as it requires material estimates that may be susceptible to significant revision as more information becomes available. Adjustments to the factors are supported through documentation of changes in conditions in a narrative accompanying the allowance for loan loss analysis and calculation. The third or unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio and generally comprises less than 10% of the total allowance for loan loss. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and shortfalls on a case-by case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length and reason for the delay, the borrower’s prior payment record and the amount of shortfall in relation to what is owed. Impairment is measured by either the present value of the expected future cash flows discounted at the loan’s effective interest rate or the fair value of the underlying collateral if the loan is collateral dependent. The majority of the Company’s loans utilize the fair value of the underlying collateral. An allowance for loan loss is established for an impaired loan if its carrying value exceeds its estimated fair value. The estimated fair values of substantially all of the Company’s impaired loans are measured based on the estimated fair value of the loan’s collateral. For loans secured by real estate, estimated fair values are determined primarily through third-party appraisals, less costs to sell. Appraised values are discounted to arrive at the estimated selling price of the collateral, which is considered to be the estimated fair value. The discounts also include estimated costs to sell the property. For commercial and industrial loans secured by non-real estate collateral, such as accounts receivable, inventory and equipment, estimated fair values are determined based on the borrower’s financial statements, inventory reports, accounts receivable agings or equipment appraisals or invoices. Indications of value from these sources are generally discounted based on the age of the financial information or the quality of the assets. Large groups of homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual residential mortgage loans less than $300,000, home equity and other consumer loans for impairment disclosures, unless such loans are related to borrowers with impaired commercial loans or they are subject to a troubled debt restructuring agreement. Loans that are related to borrowers with impaired commercial loans or are subject to a troubled debt restructuring agreement are evaluated individually for impairment. . Commercial loans whose terms are modified are classified as troubled debt restructurings if the Company grants such borrowers concessions and it is deemed that those borrowers are experiencing financial difficulty. Concessions granted under a troubled debt restructuring generally include but are not limited to a temporary reduction in the interest rate or an extension of a loan’s stated maturity date. Commercial loans classified as troubled debt restructurings are designated as impaired and evaluated individually as discussed above. The allowance calculation methodology includes further segregation of loan classes into risk rating categories. The borrower’s overall financial condition, repayment sources, guarantors and value of the collateral, if appropriate, are evaluated not less than annually for commercial loans or when credit deficiencies arise on all loans. Credit quality risk ratings include regulatory classifications of special mention, substandard, doubtful and loss. See Note 5 for a description of these regulatory classifications. In addition, Federal and State regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses and may require the Company to recognize additions to the allowance based on their judgments about information available to them at the time of their examination, which may not be currently available to management. Based on management’s comprehensive analysis of the loan portfolio, management believes the current level of the allowance for loan losses is adequate.
Income Recognition on Impaired and Nonaccrual Loans	Income Recognition on Impaired and Nonaccrual Loans For all classes of loans receivable, the accrual of interest is discontinued when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about further collectability of principal or interest, even though the loan may be currently performing. A loan may remain on accrual status if it is either well secured or guaranteed and in the process of collection. When a loan is placed on nonaccrual status, unpaid interest is reversed and charged to interest income. Interest received on nonaccrual loans, including impaired loans, generally is either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Generally, loans are restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time, generally six months, and the ultimate collectability of the total contractual principal and interest is no longer in doubt. Nonaccrual troubled debt restructurings are restored to accrual status if principal and interest payments, under the modified terms, are current for six consecutive months after modification. For nonaccrual loans, when future collectability of the recorded loan balance is expected, interest income may be recognized on a cash basis. In the case where a nonaccrual loan had been partially charged off, recognition of interest on a cash basis is limited to that which would have been recognized on the recorded loan balance at the contractual interest rate. Cash interest receipts in excess of that amount are recorded as recoveries to the allowance for loan losses until prior charge-offs have been fully recovered.
Off-Balance Sheet Credit Related Financial Instruments	Off-Balance Sheet Credit Related Financial Instruments In the ordinary course of business, the Company has entered into commitments to extend credit, including commitments under standby letters of credit. Such financial instruments are recorded when they are funded.
Premises and Equipment	Premises and Equipment Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is computed on a straight-line basis over the estimated useful lives of the related assets, ranging up to 40 years for premises and 10 years for equipment. Maintenance and repairs are charged to operating expenses as incurred. The asset cost and accumulated depreciation are removed from the accounts for assets sold or retired and any resulting gain or loss is included in the determination of income.
Foreclosed Real Estate	Foreclosed Real Estate Physical possession of residential real estate property collateralizing a residential mortgage loan occurs when legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through completion of a deed-in-lieu of foreclosure or through a similar legal agreement. Properties acquired through foreclosure, or by deed-in-lieu of foreclosure, are recorded at their fair value less estimated costs to sell. Fair value is typically determined based on evaluations by third parties. Costs incurred in connection with preparing the foreclosed real estate for disposition are capitalized to the extent that they enhance the overall fair value of the property. Any write-downs on the asset’s fair value less costs to sell at the date of acquisition are charged to the allowance for loan losses. Subsequent write downs and expenses of foreclosed real estate are included as a valuation allowance and recorded in noninterest expense.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill represents the excess cost of an acquisition over the fair value of the net assets acquired. Goodwill is not amortized, but is evaluated annually for impairment. Intangible assets, such as customer relationships, are amortized over their useful lives, generally 15 years.
Mortgage Servicing Rights	Mortgage Servicing Rights Originated mortgage servicing rights are recorded at their fair value at the time of transfer of the related loans and are amortized in proportion to, and over the period of, estimated net servicing income or loss. The carrying value of the originated mortgage servicing rights is periodically evaluated for impairment or between annual evaluations under certain circumstances.
Stock-Based Compensation	Stock-Based Compensation Compensation costs related to share-based payment transactions are recognized based on the grant-date fair value of the stock-based compensation issued. Compensation costs are recognized over the period that an employee provides service in exchange for the award. Compensation costs related to the Employee Stock Ownership Plan are dependent upon the average stock price and the shares committed to be released to plan participants through the period in which income is reported.
Retirement Benefits	Retirement Benefits The Company has a non-contributory defined benefit pension plan that covered substantially all employees. On May 14, 2012, the Company informed its employees of its decision to freeze participation and benefit accruals under the plan, primarily to reduce some of the volatility in earnings that can accompany the maintenance of a defined benefit plan. The plan was frozen on June 30, 2012. Compensation earned by employees up to June 30, 2012 is used for purposes of calculating benefits under the plan but there will be no future benefit accruals after this date. Participants as of June 30, 2012 will continue to earn vesting credit with respect to their frozen accrued benefits as they continue to work. Pension expense under these plans is charged to current operations and consists of several components of net pension cost based on various actuarial assumptions regarding future experience under the plans. Gains and losses, prior service costs and credits, and any remaining transition amounts that have not yet been recognized through net periodic benefit cost are recognized in accumulated other comprehensive loss, net of tax effects, until they are amortized as a component of net periodic cost. Plan assets and obligations are measured as of the Company’s statement of condition date. The Company has unfunded deferred compensation and supplemental executive retirement plans for selected current and former employees and officers that provide benefits that cannot be paid from a qualified retirement plan due to Internal Revenue Code restrictions. These plans are nonqualified under the Internal Revenue Code, and assets used to fund benefit payments are not segregated from other assets of the Company, therefore, in general, a participant's or beneficiary's claim to benefits under these plans is as a general creditor. The Bank sponsors an Employee Stock Ownership Plan (“ESOP”) covering substantially all full time employees. The cost of shares issued to the ESOP but not committed to be released to the participants is presented in the consolidated statement of condition as a reduction of shareholders’ equity. ESOP shares are released to the participants on an annual basis in accordance with a predetermined schedule. The Company records ESOP compensation expense based on the shares committed to be released and allocated to the participant’s accounts multiplied by the average share price of the Company’s stock over the period. Dividends related to unallocated shares are recorded as compensation expense.
Derivative Financial Instruments	Derivative Financial Instruments Derivatives are recorded on the statement of condition as assets and liabilities measured at their fair value. The accounting for increases and decreases in the value of derivatives depends upon the use of derivatives and whether the derivatives qualify in whole or in part for the provisions of hedge accounting. The Company had one interest rate swap, which has been determined to be a cash flow hedge that expired in 2016 and was not renewed. The fair value of cash-flow hedging instruments (“Cash Flow Hedge”) are recorded in either other assets or other liabilities. On an ongoing basis, the statement of condition is adjusted to reflect the then current fair value of the Cash Flow Hedge. The related gains or losses are reported in other comprehensive income (loss) and are subsequently reclassified into earnings, as a yield adjustment in the same period in which the related interest on the hedged item (primarily a variable-rate debt obligation) affects earnings. To the extent that the Cash Flow Hedge is not effective, the ineffective portion of the Cash Flow Hedge is immediately recognized as interest expense. As a hedge against rising short-term interest rates, the Company sold a series of U.S. Treasury securities in the amount of $40 million during 2017. The Company was in controlling possession of, but did not own, the securities which had been received as collateral, under industry-standard repurchase agreements, for a corresponding series of 30-day loans of approximately $40 million on each occurrence to an unrelated third party at market rates of interest. The sale of these securities provided the funds necessary to advance the loan to the third party and placed the Company in what is generally described as a “short position” with respect to the sold U.S. Treasury securities. This transaction acted as a hedge against rising short-term interest rates because the price of the sold securities would be expected to decline in a rising short-term interest rate environment and could be subsequently re-acquired at the conclusion of the 30-day loan period at a price lower than the price at which it was originally sold. Short-term rates generally rose during the successive 30-day loan periods and, consequently, the Company recognized gains on the sale of those securities in the amount of $428,000 when the Treasury securities were repurchased. In 2016 the Company sold a U.S. Treasury security in the amount of $25 million which had been received as collateral, under an industry-standard repurchase agreement, for a 30-day loan of approximately $25 million to an unrelated third party, at no interest. The sale of this security provided the funds necessary to advance the loan to the third party and placed the Company in what is generally described as a “short position” with respect to the sold U.S. Treasury securities. Short-term rates rose during the 30-day loan periods and, consequently, the Company recognized a gain on the sale of the security in the amount of $85,000. The hedge positions were closed on December 31, 2017 and 2016.
Income Taxes	Income Taxes Provisions for income taxes are based on taxes currently payable or refundable and deferred income taxes on temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements. Deferred tax assets and liabilities are reported in the consolidated financial statements at currently enacted income tax rates applicable to the period in which the deferred tax assets and liabilities are expected to be realized or settled. On December 22, 2017 the Tax Act was signed into law. The Tax Act instituted significant changes to various sections of the Internal Revenue Code that effects the Company. Most notably, the Tax Act reduces the Company’s marginal federal income tax rate from 34% to 21% starting January 1, 2018. Generally Accepted Accounting Principles (“GAAP”) requires that the impact of the provisions of the Tax Act be accounted for in the period of enactment. Accordingly, the Company recorded an income tax benefit in the fourth quarter of 2017 related to the Tax Act in the amount of $155,000. The reduction in income tax expense was largely attributable to the reduction in the value of net deferred tax assets and liabilities reflecting lower future tax obligations resulting from the Tax Act’s enacted lower federal corporate tax rate.
Earning Per Share	Earnings Per Share Basic earnings per common share are computed by dividing net income, after preferred stock dividends and preferred stock discount accretion, by the weighted average number of common shares outstanding throughout each year. Diluted earnings per share gives effect to weighted average shares that would be outstanding assuming the exercise of issued stock options using the treasury stock method. Unallocated shares of the Company’s ESOP plan are not included when computing earnings per share until they are committed to be released.
Segment Reporting	Segment Reporting The Company has evaluated the activities relating to its strategic business units. The controlling interest in the FitzGibbons Agency is dissimilar in nature and management when compared to the Company’s other strategic business units which are judged to be similar in nature and management. The Company has determined that the FitzGibbons Agency is below the reporting threshold in size in accordance with Accounting Standards Codification 280. Accordingly, the Company has determined it has no reportable segments.
Comprehensive Income (Loss)	Comprehensive Income (Loss) Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities are reported as a separate component of the equity section of the statement of condition, such items, along with net income, are components of comprehensive income. Accumulated other comprehensive loss represents the sum of these items, with the exception of net income, as of the balance sheet date and is represented in the table below. As of December 31, Accumulated Other Comprehensive Loss By Component: 2017 2016 Unrealized loss for pension and other postretirement obligations $ (3,003 ) $ (2,520 ) Tax effect 783 1,007 Net unrealized loss for pension and other postretirement obligations (2,220 ) (1,513 ) Unrealized loss on available-for-sale securities (2,108 ) (3,072 ) Tax effect 550 1,227 Net unrealized loss on available-for-sale securities (1,558 ) (1,845 ) Unrealized loss on securities transferred to held-to-maturity (585 ) (774 ) Tax effect 155 310 Net unrealized loss on securities transferred to held-to-maturity (430 ) (464 ) Accumulated other comprehensive loss $ (4,208 ) $ (3,822 ) (1) Reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the newly enacted Federal corporate income tax rate reduction from 34% to 21%.
Reclassifications	Reclassifications Certain amounts in the 2016 consolidated financial statements have been reclassified to conform to the current year presentation. These reclassifications had no effect on net income as previously reported.

Summary of Significant Accoun36

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Schedule of Accumulated Other Comprehensive Loss	Accumulated other comprehensive loss represents the sum of these items, with the exception of net income, as of the balance sheet date and is represented in the table below. As of December 31, Accumulated Other Comprehensive Loss By Component: 2017 2016 Unrealized loss for pension and other postretirement obligations $ (3,003 ) $ (2,520 ) Tax effect 783 1,007 Net unrealized loss for pension and other postretirement obligations (2,220 ) (1,513 ) Unrealized loss on available-for-sale securities (2,108 ) (3,072 ) Tax effect 550 1,227 Net unrealized loss on available-for-sale securities (1,558 ) (1,845 ) Unrealized loss on securities transferred to held-to-maturity (585 ) (774 ) Tax effect 155 310 Net unrealized loss on securities transferred to held-to-maturity (430 ) (464 ) Accumulated other comprehensive loss $ (4,208 ) $ (3,822 ) (1) Reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the newly enacted Federal corporate income tax rate reduction from 34% to 21%.

Earnings per Share (Tables)

Earnings per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Calculations of Basic and Diluted Earnings per Share	The following table sets forth the calculation of basic and diluted earnings per share. Years ended December 31, (In thousands, except per share data) 2017 2016 Basic Earnings Per Common Share Net income available to common shareholders $ 3,491 $ 3,256 Weighted average common shares outstanding 4,081 4,105 Basic earnings per common share $ 0.86 $ 0.79 Diluted Earnings Per Common Share Net income available to common shareholders $ 3,491 $ 3,256 Weighted average common shares outstanding 4,081 4,105 Effect of assumed exercise of stock options 108 85 Diluted weighted average common shares outstanding 4,189 4,190 Diluted earnings per common share $ 0.83 $ 0.78

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Investments Debt And Equity Securities [Abstract]
Amortized Cost and Estimated Fair Value of Investment Securities	The amortized cost and estimated fair value of investment securities are summarized as follows: December 31, 2017 Gross Gross Estimated Amortized Unrealized Unrealized Fair (In thousands) Cost Gains Losses Value Available-for-Sale Portfolio Debt investment securities: US Treasury, agencies and GSEs $ 41,489 $ 1 $ (154 ) $ 41,336 State and political subdivisions 13,960 12 (291 ) 13,681 Corporate 8,584 108 (92 ) 8,600 Asset backed securities 6,662 12 (30 ) 6,644 Residential mortgage-backed - US agency 36,214 23 (495 ) 35,742 Collateralized mortgage obligations - US agency 54,481 - (1,133 ) 53,348 Collateralized mortgage obligations - Private label 11,193 62 (203 ) 11,052 Total 172,583 218 (2,398 ) 170,403 Equity investment securities: Common stock - financial services industry 663 72 - 735 Total 663 72 - 735 Total available-for-sale $ 173,246 $ 290 $ (2,398 ) $ 171,138 Held-to-Maturity Portfolio Debt investment securities: US Treasury, agencies and GSEs $ 4,948 $ 14 $ (14 ) $ 4,948 State and political subdivisions 35,130 641 (311 ) 35,460 Corporate 8,311 151 (159 ) 8,303 Residential mortgage-backed - US agency 6,853 53 (10 ) 6,896 Collateralized mortgage obligations - US agency 7,574 83 (215 ) 7,442 Collateralized mortgage obligations - Private label 3,380 7 (10 ) 3,377 Total held-to-maturity $ 66,196 $ 949 $ (719 ) $ 66,426 December 31, 2016 Gross Gross Estimated Amortized Unrealized Unrealized Fair (In thousands) Cost Gains Losses Value Available-for-Sale Portfolio Debt investment securities: US Treasury, agencies and GSEs $ 24,263 $ 1 $ (80 ) $ 24,184 State and political subdivisions 17,185 33 (737 ) 16,481 Corporate 15,560 20 (385 ) 15,195 Asset backed securities 6,696 5 (37 ) 6,664 Residential mortgage-backed - US agency 31,204 - (638 ) 30,566 Collateralized mortgage obligations - US agency 42,124 45 (1,183 ) 40,986 Collateralized mortgage obligations - Private label 6,682 - (105 ) 6,577 Total 143,714 104 (3,165 ) 140,653 Equity investment securities: Mutual funds: Ultra short mortgage fund 643 - (17 ) 626 Common stock - financial services industry 663 13 - 676 Total 1,306 13 (17 ) 1,302 Total available-for-sale $ 145,020 $ 117 $ (3,182 ) $ 141,955 Held-to-Maturity Portfolio Debt investment securities: US Treasury, agencies and GSEs $ 4,928 $ 30 $ (18 ) $ 4,940 State and political subdivisions 30,697 572 (693 ) 30,576 Corporate 8,240 85 (228 ) 8,097 Residential mortgage-backed - US agency 6,386 31 (20 ) 6,397 Collateralized mortgage obligations - US agency 2,927 96 - 3,023 Collateralized mortgage obligations - Private label 1,467 - (71 ) 1,396 Total held-to-maturity $ 54,645 $ 814 $ (1,030 ) $ 54,429
Amortized Cost and Estimated Fair Value of Debt Investments by Contractual Maturity	The amortized cost and estimated fair value of debt investments at December 31, 2017 by contractual maturity are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties. Available-for-Sale Held-to-Maturity Amortized Estimated Amortized Estimated (In thousands) Cost Fair Value Cost Fair Value Due in one year or less $ 21,555 $ 21,506 $ 1,680 $ 1,680 Due after one year through five years 28,957 28,830 11,381 11,488 Due after five years through ten years 11,587 11,642 16,993 17,479 Due after ten years 8,596 8,283 18,335 18,064 Sub-total 70,695 70,261 48,389 48,711 Residential mortgage-backed - US agency 36,214 35,742 6,853 6,896 Collateralized mortgage obligations - US agency 54,481 53,348 7,574 7,442 Collateralized mortgage obligations - Private label 11,193 11,052 3,380 3,377 Totals $ 172,583 $ 170,403 $ 66,196 $ 66,426
Investment Securities' Gross Unrealized Losses and Fair Value by Investment Category and Length of Time that Individual Securities Have Continuous Unrealized Loss Position	The Company’s investment securities’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, is as follows: December 31, 2017 Less than Twelve Months Twelve Months or More Total Number of Number of Number of Individual Unrealized Fair Individual Unrealized Fair Individual Unrealized Fair (Dollars in thousands) Securities Losses Value Securities Losses Value Securities Losses Value Available-for-Sale Portfolio US Treasury, agencies and GSE's 5 $ (105 ) $ 27,359 4 $ (49 ) $ 13,957 9 $ (154 ) $ 41,316 State and political subdivisions 18 (24 ) 2,480 12 (267 ) 5,041 30 (291 ) 7,521 Corporate 2 (19 ) 1,791 1 (73 ) 1,727 3 (92 ) 3,518 Asset backed securities 2 (17 ) 3,123 1 (13 ) 742 3 (30 ) 3,865 Residential mortgage-backed - US agency 15 (159 ) 21,551 9 (336 ) 10,463 24 (495 ) 32,014 Collateralized mortgage obligations - US agency 14 (195 ) 23,790 21 (938 ) 25,395 35 (1,133 ) 49,185 Collateralized mortgage obligations - Private label 4 (203 ) 7,439 - - - 4 (203 ) 7,439 Totals 60 $ (722 ) $ 87,533 48 $ (1,676 ) $ 57,325 108 $ (2,398 ) $ 144,858 Held-to-Maturity Portfolio US Treasury, agencies and GSE's 2 $ (2 ) $ 1,990 1 $ (12 ) $ 988 3 $ (14 ) $ 2,978 State and political subdivisions 8 (55 ) 5,668 11 (256 ) 8,644 19 (311 ) 14,312 Corporate 3 (10 ) 1,412 1 (149 ) 2,087 4 (159 ) 3,499 Residential mortgage-backed - US agency 2 (10 ) 1,909 - - - 2 (10 ) 1,909 Collateralized mortgage obligations - US agency 2 (215 ) 4,418 - - - 2 (215 ) 4,418 Collateralized mortgage obligations - Private label 1 (10 ) 1,119 - - - 1 (10 ) 1,119 Totals 18 $ (302 ) $ 16,516 13 $ (417 ) $ 11,719 31 $ (719 ) $ 28,235 December 31, 2016 Less than Twelve Months Twelve Months or More Total Number of Number of Number of Individual Unrealized Fair Individual Unrealized Fair Individual Unrealized Fair (Dollars in thousands) Securities Losses Value Securities Losses Value Securities Losses Value Available-for-Sale Portfolio US Treasury, agencies and GSE's 6 $ (80 ) $ 22,161 - $ - $ - 6 $ (80 ) $ 22,161 State and political subdivisions 53 (737 ) 14,057 - - - 53 (737 ) 14,057 Corporate 10 (385 ) 10,587 - - - 10 (385 ) 10,587 Asset backed securities 3 (37 ) 4,455 - - - 3 (37 ) 4,455 Equity and other investments 1 (17 ) 626 - - - 1 (17 ) 626 Residential mortgage-backed - US agency 23 (638 ) 29,849 - - - 23 (638 ) 29,849 Collateralized mortgage obligations - US agency 28 (1,087 ) 33,376 4 (96 ) 2,514 32 (1,183 ) 35,890 Collateralized mortgage obligations - Private label 5 (105 ) 6,577 - - - 5 (105 ) 6,577 Totals 129 $ (3,086 ) $ 121,688 4 $ (96 ) $ 2,514 133 $ (3,182 ) $ 124,202 Held-to-Maturity Portfolio US Treasury, agencies and GSE's 1 $ (18 ) $ 982 - $ - $ - 1 $ (18 ) $ 982 State and political subdivisions 16 (693 ) 10,038 - - - 16 (693 ) 10,038 Corporate 5 (228 ) 4,402 - - - 5 (228 ) 4,402 Residential mortgage-backed - US agency 3 (20 ) 1,869 - - - 3 (20 ) 1,869 Collateralized mortgage obligations - Private label 1 (71 ) 1,396 - - - 1 (71 ) 1,396 Totals 26 $ (1,030 ) $ 18,687 - $ - $ - 26 $ (1,030 ) $ 18,687
Gross Realized Gains (Losses) on Sale of Securities	Proceeds of $67.6 million and $33.2 million, respectively on sales and redemptions of securities for the years ended December 31 resulted in gross realized gains (losses) detailed below: (In thousands) 2017 2016 Realized gains on investments $ 427 $ 526 Realized gains on hedging activity 428 85 Realized losses on investments (366 ) (17 ) $ 489 $ 594

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Major Classification of Loans	Major classifications of loans are as follows: December 31, December 31, (In thousands) 2017 2016 Residential mortgage loans: 1-4 family first-lien residential mortgages $ 216,793 $ 199,000 Construction 5,558 8,505 Total residential mortgage loans 222,351 207,505 Commercial loans: Real estate 192,525 150,698 Lines of credit 51,131 50,477 Other commercial and industrial 50,251 40,394 Tax exempt loans 10,405 12,523 Total commercial loans 304,312 254,092 Consumer loans: Home equity and junior liens 25,935 24,722 Other consumer 28,646 6,293 Total consumer loans 54,581 31,015 Total loans 581,244 492,612 Net deferred loan fees (413 ) (465 ) Less allowance for loan losses (7,126 ) (6,247 ) Loans receivable, net $ 573,705 $ 485,900
Summary of Classes of Loan Portfolio	The following table presents the segments and classes of the loan portfolio summarized by the aggregate pass rating and the criticized and classified ratings of special mention, substandard and doubtful within the Company's internal risk rating system: As of December 31, 2017 Special (In thousands) Pass Mention Substandard Doubtful Total Residential mortgage loans: 1-4 family first-lien residential mortgages $ 211,825 $ 891 $ 1,869 $ 2,208 $ 216,793 Construction 5,558 - - 5,558 Total residential mortgage loans 217,383 891 1,869 2,208 222,351 Commercial loans: Real estate 187,073 1,372 2,024 2,056 192,525 Lines of credit 50,353 195 523 60 51,131 Other commercial and industrial 48,892 407 532 420 50,251 Tax exempt loans 10,405 - - - 10,405 Total commercial loans 296,723 1,974 3,079 2,536 304,312 Consumer loans: Home equity and junior liens 25,396 61 304 174 25,935 Other consumer 28,584 55 7 - 28,646 Total consumer loans 53,980 116 311 174 54,581 Total loans $ 568,086 $ 2,981 $ 5,259 $ 4,918 $ 581,244 As of December 31, 2016 Special (In thousands) Pass Mention Substandard Doubtful Total Residential mortgage loans: 1-4 family first-lien residential mortgages $ 194,377 $ 1,445 $ 2,115 $ 1,063 $ 199,000 Construction 8,505 - - - 8,505 Total residential mortgage loans 202,882 1,445 2,115 1,063 207,505 Commercial loans: Real estate 143,126 3,714 3,858 - 150,698 Lines of credit 49,393 684 400 - 50,477 Other commercial and industrial 39,027 661 702 4 40,394 Tax exempt loans 12,523 - - - 12,523 Total commercial loans 244,069 5,059 4,960 4 254,092 Consumer loans: Home equity and junior liens 23,963 170 389 200 24,722 Other consumer 6,224 17 8 44 6,293 Total consumer loans 30,187 187 397 244 31,015 Total loans $ 477,138 $ 6,691 $ 7,472 $ 1,311 $ 492,612
Age Analysis of Past Due Loans Segregated by Class of loans	An age analysis of past due loans, exclusive of deferred costs, segregated by class of loans were as follows: As of December 31, 2017 30-59 Days 60-89 Days 90 Days Past Due Past Due and Total Total Loans (In thousands) and Accruing and Accruing Over Past Due Current Receivable Residential mortgage loans: 1-4 family first-lien residential mortgages $ 1,196 $ 925 $ 2,088 $ 4,209 $ 212,584 $ 216,793 Construction - - - - 5,558 5,558 Total residential mortgage loans 1,196 925 2,088 4,209 218,142 222,351 Commercial loans: Real estate 720 2,056 1,545 4,321 188,204 192,525 Lines of credit 1,482 31 132 1,645 49,486 51,131 Other commercial and industrial 575 60 766 1,401 48,850 50,251 Tax exempt loans - - - - 10,405 10,405 Total commercial loans 2,777 2,147 2,443 7,367 296,945 304,312 Consumer loans: Home equity and junior liens 94 74 300 468 25,467 25,935 Other consumer 192 50 63 305 28,341 28,646 Total consumer loans 286 124 363 773 53,808 54,581 Total loans $ 4,259 $ 3,196 $ 4,894 $ 12,349 $ 568,895 $ 581,244 As of December 31, 2016 30-59 Days 60-89 Days 90 Days Past Due Past Due and Total Total Loans (In thousands) and Accruing and Accruing Over Past Due Current Receivable Residential mortgage loans: 1-4 family first-lien residential mortgages $ 1,247 $ 832 $ 2,560 $ 4,639 $ 194,361 $ 199,000 Construction - - - - 8,505 8,505 Total residential mortgage loans 1,247 832 2,560 4,639 202,866 207,505 Commercial loans: Real estate 1,063 375 1,223 2,661 148,037 150,698 Lines of credit 819 - - 819 49,658 50,477 Other commercial and industrial 333 - 640 973 39,421 40,394 Tax exempt loans - - - - 12,523 12,523 Total commercial loans 2,215 375 1,863 4,453 249,639 254,092 Consumer loans: Home equity and junior liens 105 157 338 600 24,122 24,722 Other consumer 8 13 50 71 6,222 6,293 Total consumer loans 113 170 388 671 30,344 31,015 Total loans $ 3,575 $ 1,377 $ 4,811 $ 9,763 $ 482,849 $ 492,612
Nonaccrual Loans Segregated by Class of Loan	Year-end nonaccrual loans, segregated by class of loan, were as follows: December 31, December 31, (In thousands) 2017 2016 Residential mortgage loans: 1-4 family first-lien residential mortgages $ 2,088 $ 2,560 2,088 2,560 Commercial loans: Real estate 1,545 1,223 Lines of credit 132 - Other commercial and industrial 766 640 2,443 1,863 Consumer loans: Home equity and junior liens 300 338 Other consumer 63 50 363 388 Total nonaccrual loans $ 4,894 $ 4,811
Troubled Debt Restructurings on Financing Receivables	The table below details loans that had been modified as TDRs for the year ended December 31, 2016. For the year ended December 31, 2016 (In thousands) Number of loans Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Additional provision for loan losses Individually evaluated for impairment: Residential mortgage loans 3 $ 127 $ 135 $ 29 Commercial real estate loans 1 $ 2,088 $ 2,088 $ -
Summary of Impaired Loans Information by Portfolio Class	The following table summarizes impaired loans information by portfolio class: December 31, 2017 December 31, 2016 Unpaid Unpaid Recorded Principal Related Recorded Principal Related (In thousands) Investment Balance Allowance Investment Balance Allowance With no related allowance recorded: 1-4 family first-lien residential mortgages $ 900 $ 909 $ - $ 850 $ 857 $ - Commercial real estate 3,314 3,360 - 4,254 4,344 - Commercial lines of credit 507 507 - 400 400 - Other commercial and industrial 523 524 - 470 470 - Home equity and junior liens 80 80 - 140 140 - With an allowance recorded: 1-4 family first-lien residential mortgages 958 958 210 763 763 117 Commercial real estate 2,186 2,187 320 818 872 455 Commercial lines of credit 40 40 40 - - - Other commercial and industrial 525 525 391 552 552 553 Home equity and junior liens 210 210 142 345 345 5 Total: 1-4 family first-lien residential mortgages 1,858 1,867 210 1,613 1,620 117 Commercial real estate 5,500 5,547 320 5,072 5,216 455 Commercial lines of credit 547 547 40 400 400 - Other commercial and industrial 1,048 1,049 391 1,022 1,022 553 Home equity and junior liens 290 290 142 485 485 5 Totals $ 9,243 $ 9,300 $ 1,103 $ 8,592 $ 8,743 $ 1,130
Average Recorded Investment In Impaired Loans	The following table presents the average recorded investment in impaired loans for the years ended December 31: (In thousands) 2017 2016 1-4 family first-lien residential mortgages $ 1,553 $ 777 Commercial real estate 5,097 4,325 Commercial lines of credit 447 479 Other commercial and industrial 976 724 Home equity and junior liens 283 325 Other consumer - 2 Total $ 8,356 $ 6,632
Cash Basis Interest Income Recognized On Impaired Loans	The following table presents the cash basis interest income recognized on impaired loans for the years ended December 31: (In thousands) 2017 2016 1-4 family first-lien residential mortgages $ 71 $ 64 Commercial real estate 247 161 Commercial lines of credit 27 22 Other commercial and industrial 30 44 Home equity and junior liens 13 13 Other consumer - - Total $ 388 $ 304

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2017
Allowance For Loan Losses [Abstract]
Changes in the Allowance for Loan Losses	An allocation of a portion of the allowance to a given portfolio class does not limit the Company’s ability to absorb losses in another portfolio class. December 31, 2017 1-4 family first-lien Other residential Commercial Commercial commercial (In thousands) mortgage Construction real estate lines of credit and industrial Allowance for loan losses: Beginning Balance $ 759 $ - $ 2,935 $ 397 $ 1,658 Charge-offs (166 ) - (505 ) (60 ) (22 ) Recoveries 13 - - - 15 Provisions (credits) 259 - 1,159 398 (437 ) Ending balance $ 865 $ - $ 3,589 $ 735 $ 1,214 Ending balance: related to loans individually evaluated for impairment $ 210 $ - $ 320 $ 40 $ 391 Ending balance: related to loans collectively evaluated for impairment $ 655 $ - $ 3,269 $ 695 $ 823 Loans receivables: Ending balance $ 216,793 $ 5,558 $ 192,525 $ 51,131 $ 50,251 Ending balance: individually evaluated for impairment $ 1,858 $ - $ 5,500 $ 547 $ 1,048 Ending balance: collectively evaluated for impairment $ 214,935 $ 5,558 $ 187,025 $ 50,584 $ 49,203 Home equity Other Tax exempt and junior liens consumer Unallocated Total Allowance for loan losses: Beginning Balance $ 1 $ 331 $ 166 $ - $ 6,247 Charge-offs - (69 ) (142 ) - $ (964 ) Recoveries - 6 40 - $ 74 Provisions - 246 144 - $ 1,769 Ending balance $ 1 $ 514 $ 208 $ - $ 7,126 Ending balance: related to loans individually evaluated for impairment $ - $ 142 $ - $ - $ 1,103 Ending balance: related to loans collectively evaluated for impairment $ 1 $ 372 $ 208 $ - $ 6,023 Loans receivables: Ending balance $ 10,405 $ 25,935 $ 28,646 $ 581,244 Ending balance: individually evaluated for impairment $ - $ 290 $ - $ 9,243 Ending balance: collectively evaluated for impairment $ 10,405 $ 25,645 $ 28,646 $ 572,001 December 31, 2016 1-4 family first-lien Other residential Commercial Commercial commercial (In thousands) mortgage Construction real estate lines of credit and industrial Allowance for loan losses: Beginning Balance $ 581 $ - $ 2,983 $ 401 $ 1,270 Charge-offs (242 ) - - (69 ) - Recoveries 13 - 6 11 14 Provisions (credits) 407 - (54 ) 54 374 Ending balance $ 759 $ - $ 2,935 $ 397 $ 1,658 Ending balance: related to loans individually evaluated for impairment $ 117 - $ 455 $ - $ 553 Ending balance: related to loans collectively evaluated for impairment $ 642 - $ 2,480 $ 397 $ 1,105 Loans receivables: Ending balance $ 199,000 $ 8,505 $ 150,698 $ 50,477 $ 40,394 Ending balance: individually evaluated for impairment $ 1,613 $ - $ 5,072 $ 400 $ 1,022 Ending balance: collectively evaluated for impairment $ 197,387 $ 8,505 $ 145,626 $ 50,077 $ 39,372 Home equity Other Tax exempt and junior liens consumer Unallocated Total Allowance for loan losses: Beginning Balance $ 3 $ 350 $ 118 $ - $ 5,706 Charge-offs - (147 ) (61 ) - (519 ) Recoveries - 10 53 - 107 Provisions (credits) (2 ) 118 56 - 953 Ending balance $ 1 $ 331 $ 166 $ - $ 6,247 Ending balance: related to loans individually evaluated for impairment $ - $ 5 $ - - $ 1,130 Ending balance: related to loans collectively evaluated for impairment $ 1 $ 326 $ 166 - $ 5,117 Loans receivables: Ending balance $ 12,523 $ 24,722 $ 6,293 $ 492,612 Ending balance: individually evaluated for impairment $ - $ 485 $ - $ 8,592 Ending balance: collectively evaluated for impairment $ 12,523 $ 24,237 $ 6,293 $ 484,020
Schedule of Allowance for Loan Losses on Basis of Calculation Methodology	The allocation of the allowance for loan losses summarized on the basis of the Company’s calculation methodology was as follows: December 31, 2017 1-4 family first-lien Other residential Commercial Commercial commercial (In thousands) mortgage Construction real estate lines of credit and industrial Specifically reserved $ 210 $ - $ 320 $ 40 $ 391 Historical loss rate 104 - 103 40 15 Qualitative factors 551 - 3,166 655 808 Total $ 865 $ - $ 3,589 $ 735 $ 1,214 Home equity Other Tax exempt and junior liens consumer Unallocated Total Specifically reserved $ - $ 142 $ - $ - $ 1,103 Historical loss rate - 41 59 - 362 Qualitative factors 1 331 149 - 5,661 Total $ 1 $ 514 $ 208 $ - $ 7,126 December 31, 2016 1-4 family first-lien Other residential Commercial Commercial commercial (In thousands) mortgage Construction real estate lines of credit and industrial Specifically reserved $ 117 $ - $ 455 $ - $ 553 Historical loss rate 106 - 45 31 50 Qualitative factors 536 - 2,435 366 1,055 Total $ 759 $ - $ 2,935 $ 397 $ 1,658 Home equity Other Tax exempt and junior liens consumer Unallocated Total Specifically reserved $ - $ 5 $ - $ - $ 1,130 Historical loss rate - 35 16 - 283 Qualitative factors 1 291 150 - 4,834 Total $ 1 $ 331 $ 166 $ - $ 6,247

Servicing (Tables)

Servicing (Tables)	12 Months Ended
	Dec. 31, 2017
Servicing Asset [Abstract]
Mortgage Servicing Rights Capitalized and Amortized	The following summarizes mortgage servicing rights capitalized and amortized: (In thousands) 2017 2016 Mortgage servicing rights capitalized $ - $ - Mortgage servicing rights amortized $ 12 $ 12

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Summary of Premises and Equipment	A summary of premises and equipment at December 31, is as follows: (In thousands) 2017 2016 Land $ 2,205 $ 2,205 Buildings 14,917 13,704 Furniture, fixtures and equipment 13,515 12,948 Construction in progress 650 455 31,287 29,312 Less: Accumulated depreciation 15,170 14,135 $ 16,117 $ 15,177

Foreclosed Real Estate (Tables)

Foreclosed Real Estate (Tables)	12 Months Ended
	Dec. 31, 2017
Real Estate Owned Disclosure Of Detailed Components [Abstract]
Carrying Amount Of Foreclosed Residential Real Estate Properties Held	(Dollars in thousands) Number of properties December 31, 2017 Number of properties December 31, 2016 Foreclosed residential real estate 5 $ 468 7 $ 393

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Gross Carrying Amount and Accumulated Amortization for Identifiable Intangible Asset	The gross carrying amount and annual amortization for this identifiable intangible asset are as follows: December 31, (In thousands) 2017 2016 Gross carrying amount $ 198 $ 214 Accumulated amortization (16 ) (16 ) Net amortizing intangibles $ 182 $ 198
Estimated Amortization Expense for Each of the Five Succeeding Years	The estimated amortization expense for each of the five succeeding years ended December 31, is as follows: (In thousands) 2018 $ 16 2019 16 2020 16 2021 16 2022 16 Thereafter 102 Total $ 182

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2017
Deposits [Abstract]
Summary of Deposits	A summary of deposits at December 31 is as follows: (In thousands) 2017 2016 Savings accounts $ 80,587 $ 80,139 Time accounts 160,736 132,007 Time accounts of $250,000 or more 52,691 57,349 Money management accounts 14,905 14,718 MMDA accounts 253,088 192,692 Demand deposit interest-bearing 66,093 53,587 Demand deposit noninterest-bearing 89,783 75,282 Mortgage escrow funds 5,720 5,209 Total Deposits $ 723,603 $ 610,983
Scheduled Maturities of Time Deposits	At December 31, 2017, the scheduled maturities of time deposits are as follows: (In thousands) Year of Maturity: 2018 $ 146,318 2019 42,244 2020 14,522 2021 5,889 2022 2,613 Thereafter 1,841 Total $ 213,427
Summary of Deposits by Type	In addition to deposits obtained from its business operations within its target market areas, the Bank also obtains brokered deposits through various programs administered by Promontory Interfinancial Network. At December 31, 2017 2016 (In thousands) Non-Brokered Brokered Total Non-Brokered Brokered Total Savings accounts $ 80,587 $ - $ 80,587 $ 80,139 $ - $ 80,139 Time accounts 109,666 51,070 $ 160,736 89,200 42,807 132,007 Time accounts of $250,000 or more 52,691 - $ 52,691 57,349 - 57,349 Money management accounts 14,905 - $ 14,905 14,718 - 14,718 MMDA accounts 159,032 94,056 $ 253,088 105,755 86,937 192,692 Demand deposit interest-bearing 66,093 - $ 66,093 53,587 - 53,587 Demand deposit noninterest-bearing 89,783 - $ 89,783 75,282 - 75,282 Mortgage escrow funds 5,720 - $ 5,720 5,209 - 5,209 Total Deposits $ 578,477 $ 145,126 $ 723,603 $ 481,239 $ 129,744 $ 610,983

Borrowed Funds (Tables)

Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Composition of Borrowings	The composition of borrowings (excluding subordinated loans) at December 31 is as follows: (In thousands) 2017 2016 Short-term: FHLB Advances $ 30,600 $ 42,000 Deferred fees hedging - (53 ) Total short-term borrowings $ 30,600 $ 41,947 Long-term: FHLB advances $ 43,288 $ 17,000 Total long-term borrowings $ 43,288 $ 17,000
Scheduled Maturities of Debt	The principal balances, interest rates and maturities of the outstanding long-term borrowings, all of which are at a fixed rate, at December 31, 2017 are as follows: Term Principal Rates (Dollars in thousands) Advances with FHLB Due within 1 year $ 2,000 1.04% Due within 2 years 31,228 1.16-2.00% Due within 10 years 10,060 1.62-2.55% Total advances with FHLB $ 43,288 Total long-term fixed rate borrowings $ 43,288 At December 31, 2017, scheduled repayments of long-term debt are as follows: (In thousands) 2018 $ 2,000 2019 31,228 2020 7,060 2021 1,000 2022 2,000 Thereafter - Total $ 43,288

Subordinated Loans (Tables)

Subordinated Loans (Tables)	12 Months Ended
	Dec. 31, 2017
Subordinated Borrowings [Abstract]
Composition of Subordinated Loans	The composition of subordinated loans at December 31 is as follows: (In thousands) 2017 2016 Subordinated loans: Junior subordinated debenture $ 5,155 $ 5,155 Subordinated loan 9,904 9,870 Total subordinated loans $ 15,059 $ 15,025
Schedule of Principal Balances, Interest Rates and Maturities of the Subordinated Loans	The principal balances, interest rates and maturities of the subordinated loans at December 31, 2017 are as follows: Term Principal Rates (Dollars in thousands) Subordinated loans: Due within 10 years $ 9,904 6.48% Due within 20 years 5,155 3-Month Libor + 1.65% Total subordinated loans $ 15,059
Scheduled Repayments of the Subordinated Loans	At December 31, 2017, scheduled repayments of the subordinated loans: (In thousands) 2018 $ - 2019 - 2020 - 2021 - 2022 - Thereafter 15,059 Total $ 15,059

Employee Benefits and Deferre48

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Compensation And Retirement Disclosure [Abstract]
Changes in Plan Benefit Obligations, Fair Value of Plan Assets and Plans' Funded Status	The following tables set forth the changes in the plans’ benefit obligations, fair value of plan assets and the plans’ funded status as of December 31: Pension Benefits Postretirement Benefits (In thousands) 2017 2016 2017 2016 Change in benefit obligations: Benefit obligations at beginning of year $ 9,323 $ 9,319 $ 154 $ 159 Service cost - - - - Interest cost 473 464 8 8 Actuarial loss (gain) 916 (231 ) 332 - Benefits paid (243 ) (229 ) (13 ) (13 ) Benefit obligations at end of year 10,469 9,323 481 154 Change in plan assets: Fair value of plan assets at beginning of year 13,634 12,808 - - Actual return on plan assets 1,565 1,055 - - Benefits paid (243 ) (229 ) (13 ) (13 ) Employer contributions - - 13 13 Fair value of plan assets at end of year 14,956 13,634 - - Funded Status - asset (liability) $ 4,487 $ 4,311 $ (481 ) $ (154 )
Amounts Recognized in Other Comprehensive Loss	Amounts recognized in accumulated other comprehensive loss as of December 31 are as follows: Pension Benefits Postretirement Benefits (In thousands) 2017 2016 2017 2016 Net loss/(gain) $ 2,827 $ 2,685 $ 176 $ (165 ) Tax Effect 1,131 1,074 70 (66 ) $ 1,696 $ 1,611 $ 106 $ (99 )
Significant Assumptions Used in Determining Benefit Obligations and Net Periodic Benefit Plan Cost	The significant assumptions used in determining the benefit obligations as of December 31, are as follows: Pension Benefits Postretirement Benefits 2017 2016 2017 2016 Weighted average discount rate 4.58 % 5.15 % 4.58 % 5.32 % Rate of increase in future compensation levels - - - - The significant assumptions used in determining the net periodic benefit plan cost for years ended December 31, were as follows: Pension Benefits Postretirement Benefits 2017 2016 2017 2016 Weighted average discount rate 4.58 % 5.05 % 4.58 % 5.23 % Expected long term rate of return on plan assets 7.00 % 7.50 % - - Rate of increase in future compensation levels - - - -
Composition of Net Periodic Benefit Plan Cost	The composition of the net periodic benefit plan cost for the years ended December 31 is as follows: Pension Benefits Postretirement Benefits (In thousands) 2017 2016 2017 2016 Service cost $ - $ - $ - $ - Interest cost 473 464 8 8 Expected return on plan assets (945 ) (951 ) - - Amortization of transition obligation - - - - Amortization of net losses/(gains) 154 226 (3 ) (3 ) Amortization of unrecognized past service liability - - (5 ) (5 ) Net periodic benefit plan benefit $ (318 ) $ (261 ) $ - $ -
Pension Plan Assets Measured at Fair Value	Pension plan assets measured at fair value are summarized below: At December 31, 2017 (In thousands) Level 1 Level 2 Level 3 Total Fair Value Asset Category: Mutual funds - equity Large-cap value (a) $ - $ 1,058 $ - $ 1,058 Large-cap Growth (b) - 1,102 - 1,102 Large-cap Core (c) - 733 - 733 Mid-cap Value (d) - 236 - 236 Mid-cap Growth (e) - 223 - 223 Mid-cap Core (f) - 239 - 239 Small-cap Value (g) - 178 - 178 Small-cap Growth (h) - 169 - 169 Small-cap Core (i) - 349 - 349 International Equity (j) - 1,419 - 1,419 Equity -Total - 5,706 - 5,706 Fixed Income Funds Fixed Income-US Core (k) - 1,713 - 1,695 Intermediate Duration (l) - 3,075 - 2,932 Long Duration (m) - 2,630 - 2,474 Fixed Income-Total - 7,418 - 7,418 Long/Short Equity(n) - 1,533 - 1,533 Company Common Stock - - - - Cash Equivalents-Money market* 58 241 - 299 Total $ 58 $ 14,898 $ - $ 14,956 At December 31, 2016 (In thousands) Level 1 Level 2 Level 3 Total Fair Value Asset Category: Mutual funds - equity Large-cap value (a) $ - $ 958 $ - $ 958 Large-cap Growth (b) - 860 - 860 Large-cap Core (c) - 609 - 609 Mid-cap Value (d) - 204 - 204 Mid-cap Growth (e) - 186 - 186 Mid-cap Core (f) - 209 - 209 Small-cap Value (g) - 167 - 167 Small-cap Growth (h) - 140 - 140 Small-cap Core (i) - 312 - 312 International Equity (j) - 1,131 - 1,131 Equity -Total - 4,776 - 4,776 Fixed Income Funds Fixed Income-US Core (k) - 1,695 - 1,695 Intermediate Duration (l) - 2,932 - 2,932 Long Duration (m) - 2,474 - 2,474 Fixed Income-Total - 7,101 - 7,101 Long/Short Equity(n) - 1,165 - 1,165 Company Common Stock - - - - Cash Equivalents-Money market* 70 522 - 592 Total $ 70 $ 13,564 $ - $ 13,634 *Includes cash equivalents investments in equity and fixed income strategies a) This category contains large-cap stocks with above-average yield. The portfolio typically holds between 60 and 70 stocks. b) This category seeks long-term capital appreciation by investing primarily in large growth companies based in the U.S. c) This fund tracks the performance of the S&P 500 index by purchasing the securities represented in the index in approximately the same weightings as the index. d) This category employs an indexing investment approach designed to track the performance of the CRSP US Mid-Cap Value Index. e) This category employs an indexing investment approach designed to track the performance of the CRSP US Mid-Cap Growth Index. f) This category seeks to track the performance of the S&P Midcap 400 Index. g) This category consists of a selection of investments based on the Russell 2000 Value Index. h) This category consists of a selection of investments based on the Russell 2000 Growth Index. i) This category consists of an index fund designed to track the Russell 2000, along with a fund investing in readily marketable securities of U.S. companies with market capitalizations within the smallest 10% of the market universe, or smaller than the 1000th largest US company. j) This category has investments in medium to large non-US companies, including high quality, durable growth companies and companies based in countries with stable economic and political systems. A portion of this category consists of an index fund designed to track the MSC ACWI ex-US Net Dividend Return Index. k) This category currently includes equal investments in three mutual funds, two of which usually hold at least 80% of fund assets in investment grade fixed income securities, seeking to outperform the Barclays US Aggregate Bond Index while maintaining a similar duration to that index. The third fund targets investments of 50% or more in mortgage-backed securities guaranteed by the US government and its agencies. l) This category consists mostly of a fund which seeks to track the Barclays Capital US Corporate A or Better 5-20 Year, Bullets only Index, along with a diversified mutual fund holding fixed income securities rated A or better. m) This category consists of a fund that seeks to approximate the performance of the Barclays Capital US Corporate A or Better, 20+ Year Bullets Only Index over the long term. n) This category currently invests in three long/short equity hedge funds.
Expected Future Service Benefit Payments	The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid from both retirement plans: Pension Postretirement (In thousands) Benefits Benefits Total Years ending December 31: 2018 $ 297 $ 32 $ 329 2019 306 34 340 2020 324 35 359 2021 341 37 378 2022 364 39 403 Years 2023-2027 2,626 140 2,766

Stock Based Compensation Plans

Stock Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Activity in the Stock Option Plans	Activity in the stock option plans is as follows: Weighted Options Average Shares (Shares in thousands) Outstanding Exercise Price Exercisable Outstanding at December 31, 2015 185 $ 5.75 128 Granted 264 $ 11.25 - Newly vested - 6.21 37 Exercised (26 ) - (26 ) Expired - - - Outstanding at December 31, 2016 423 $ 6.21 139 Granted - $ - - Newly vested - 10.92 57 Exercised (28 ) - (28 ) Expired - - - Outstanding at December 31, 2017 395 $ 10.92 168

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provision for Income Taxes	The provision for income taxes for the years ended December 31, is as follows: (In thousands) 2017 2016 Current $ 1,022 $ 1,360 Deferred (100 ) (249 ) $ 922 $ 1,111 The provision for income taxes includes the following (In thousands) 2017 2016 Federal Income Tax $ 741 $ 980 State Tax 181 131 $ 922 $ 1,111
Components of the Net Deferred Tax Asset Included in Other Assets	The components of the net deferred tax asset, included in other assets as of December 31, are as follows: (In thousands) 2017 2016 Assets: Deferred compensation $ 847 $ 912 Allowance for loan losses 1,862 2,392 Postretirement benefits 126 56 Subordinated loan interest 23 37 Investment securities and financial derivative 551 1,229 Impairment losses on investment securities - 88 Loan origination fees 108 184 Capital loss carryforward - 62 Held-to-maturity securities 153 310 Other 212 166 Total 3,882 5,436 Liabilities: Prepaid pension (1,173 ) (1,605 ) Depreciation (968 ) (1,083 ) Accretion (120 ) (211 ) Intangible assets (1,004 ) (1,470 ) Mortgage servicing rights (7 ) (15 ) Prepaid expenses and transaction fees (79 ) (204 ) Total (3,351 ) (4,588 ) 531 848 Less: deferred tax asset valuation allowance - (150 ) Net deferred tax asset $ 531 $ 698
Reconciliation of the Federal Statutory Income Tax Rate to the Effective Income Tax Rate	A reconciliation of the federal statutory income tax rate to the effective income tax rate for the years ended December 31, is as follows: 2017 2016 Federal statutory income tax rate 34.0 % 34.0 % State tax, net of federal benefit 2.9 1.9 Tax-exempt interest income (11.2 ) (8.6 ) Increase in value of bank owned life insurance less premiums paid (2.0 ) (2.0 ) Change in valuation allowance (3.5 ) (2.6 ) Remeasurement of net deferred tax assets for tax rate reduction - Tax Cuts & Jobs Act (3.5 ) - Other 4.5 2.5 Effective income tax rate - Pathfinder Bancorp, Inc. 21.2 % 25.2 % Minority interest (0.6 ) 0.3 Effective income tax rate 20.6 % 25.5 %

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Summary of the Contractual Amounts of Financial Instruments with Credit Risk	At December 31, 2017 and 2016, the following financial instruments were outstanding whose contract amounts represent credit risk: Contract Amount (In thousands) 2017 2016 Commitments to grant loans $ 58,235 $ 46,649 Unfunded commitments under lines of credit 62,879 48,653 Unfunded commitments related to construction loans in progress 3,506 5,918 Standby letters of credit 2,153 1,900
Schedule of Minimum Rental Commitments for Non-cancelable Operating Leases	Approximate minimum rental commitments for non-cancelable operating leases are as follows: Years Ending December 31: (In thousands) 2018 203 2019 184 2020 170 2021 145 2022 136 Thereafter 301 Total minimum lease payments $ 1,139

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2017
Regulatory Capital Requirements [Abstract]
Actual Capital Amounts and Ratios	The Bank’s actual capital amounts and ratios as of December 31, 2017 and 2016 are presented in the following table. Actual Minimum For Capital Adequacy Purposes Minimum To Be "Well-Capitalized" Under Prompt Corrective Provisions Well-Capitalized With Buffer, Fully Phased In 2019 (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of December 31, 2017: Total Core Capital (to Risk-Weighted Assets) $ 78,105 13.97 % $ 44,733 8.00 % $ 55,916 10.00 % $ 58,712 10.50 % Tier 1 Capital (to Risk-Weighted Assets) $ 71,114 12.72 % $ 33,550 6.00 % $ 44,733 8.00 % $ 47,529 8.50 % Tier 1 Common Equity (to Risk-Weighted Assets) $ 71,114 12.72 % $ 25,162 4.50 % $ 36,345 6.50 % $ 39,141 7.00 % Tier 1 Capital (to Assets) $ 71,114 8.16 % $ 34,863 4.00 % $ 43,579 5.00 % $ 43,579 5.00 % As of December 31, 2016: Total Core Capital (to Risk-Weighted Assets) $ 72,098 14.79 % $ 38,996 8.00 % $ 48,745 10.00 % $ 51,182 10.50 % Tier 1 Capital (to Risk-Weighted Assets) $ 66,003 13.54 % $ 29,247 6.00 % $ 38,996 8.00 % $ 41,433 8.50 % Tier 1 Common Equity (to Risk-Weighted Assets) $ 66,003 13.54 % $ 21,935 4.50 % $ 31,684 6.50 % $ 34,121 7.00 % Tier 1 Capital (to Assets) $ 66,003 9.06 % $ 29,154 4.00 % $ 36,443 5.00 % $ 36,443 5.00 %

Fair Value Measurements and D53

Fair Value Measurements and Disclosures (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value of Assets on Recurring Basis Segregated by Level of Valuation Inputs	The following tables summarize assets measured at fair value on a recurring basis as of December 31, segregated by the level of valuation inputs within the hierarchy utilized to measure fair value: December 31, 2017 Total Fair (In thousands) Level 1 Level 2 Level 3 Value Available-for-Sale Portfolio Debt investment securities: US Treasury, agencies and GSEs $ - $ 41,336 $ - $ 41,336 State and political subdivisions - 13,681 - 13,681 Corporate - 8,600 - 8,600 Asset backed securities - 6,644 - 6,644 Residential mortgage-backed - US agency - 35,742 - 35,742 Collateralized mortgage obligations - US agency - 53,348 - 53,348 Collateralized mortgage obligations - Private label - 11,052 - 11,052 Equity investment securities: Common stock - Financial services industry - 220 515 735 Total available-for-sale securities $ - $ 170,623 $ 515 $ 171,138 December 31, 2016 Total Fair (In thousands) Level 1 Level 2 Level 3 Value Available-for-Sale Portfolio Debt investment securities: US Treasury, agencies and GSEs $ - $ 24,184 $ - $ 24,184 State and political subdivisions - 16,481 - 16,481 Corporate - 15,195 - 15,195 Asset backed securities - 6,664 - 6,664 Residential mortgage-backed - US agency - 30,566 - 30,566 Collateralized mortgage obligations - US agency - 40,986 - 40,986 Collateralized mortgage obligations - Private label - 6,577 - 6,577 Equity investment securities: Mutual funds: Ultra short mortgage fund 626 - - 626 Common stock - Financial services industry - 220 456 676 Total available-for-sale securities $ 626 $ 140,873 $ 456 $ 141,955
Changes in Level 3 Assets and Liabilities Measured at Estimated Fair Value on a Recurring Basis	The changes in Level 3 assets and liabilities measured at estimated fair value on a recurring basis as of December 31 were as follows: (In thousands) Common Stock - Financial Services Industry Balance - December 31, 2016 $ 456 Total gains realized/unrealized: Included in earnings - Included in other comprehensive income 59 Settlements - Sales - Balance - December 31, 2017 $ 515 Changes in unrealized gains included in earnings related to assets still held at December 31, 2017 -
Summary of Valuation Techniques and Significant Unobservable Inputs Used for Investments are Categorized Within Level 3 Fair Value Hierarchy	The following table summarizes the valuation techniques and significant unobservable inputs used for the Company's investments that are categorized within Level 3 of the fair value hierarchy at the indicated dates: (In thousands) At December 31, 2017 Investment Type Fair Value Valuation Techniques Unobservable Input Weight Common Stock - Financial Services Industry $ 515 Inputs to comparables Weight 100% (In thousands) At December 31, 2016 Investment Type Fair Value Valuation Techniques Unobservable Input Weight Common Stock - Financial Services Industry $ 456 Inputs to comparables Weight ascribed to comparable companies 100%
Summary of Fair Value Assets Measured on Nonrecurring Basis	The following tables summarize assets measured at fair value on a nonrecurring basis as of December 31, segregated by the level of valuation inputs within the hierarchy utilized to measure fair value: December 31, 2017 Total Fair (In thousands) Level 1 Level 2 Level 3 Value Impaired loans $ - $ - $ 4,887 $ 4,887 Foreclosed real estate $ - $ - $ 434 $ 434
Fair Value Inputs, Quantitative Information	The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which Level 3 inputs were used to determine fair value. Quantitative Information about Level 3 Fair Value Measurements Valuation Unobservable Range Techniques Input (Weighted Avg.) At December 31, 2017 Impaired loans Appraisal of collateral Appraisal Adjustments 5% - 30% (9%) (Sales Approach) Costs to Sell 7% - 13% (11%) Discounted Cash Flow Foreclosed real estate Appraisal of collateral Appraisal Adjustments 15% - 15% (15%) (Sales Approach) Costs to Sell 6% - 8% (7%) Quantitative Information about Level 3 Fair Value Measurements Valuation Unobservable Range Techniques Input (Weighted Avg.) At December 31, 2016 Impaired loans Appraisal of collateral Appraisal Adjustments 5% - 10% (5%) (Sales Approach) Costs to Sell 8% - 13% (10%) Discounted Cash Flow Foreclosed real estate Appraisal of collateral Appraisal Adjustments 15% - 15% (15%) (Sales Approach) Costs to Sell 6% - 8% (7%)
Carrying Amounts and Fair Value of Financial Instruments	The carrying amounts and fair values of the Company’s financial instruments as of December 31 are presented in the following table: December 31, 2017 December 31, 2016 Fair Value Carrying Estimated Carrying Estimated (In thousands) Hierarchy Amounts Fair Values Amounts Fair Values Financial assets: Cash and cash equivalents 1 $ 21,991 $ 21,991 $ 22,419 $ 22,419 Investment securities - available-for-sale 1 - - 626 626 Investment securities - available-for-sale 2 170,623 170,623 140,873 140,873 Investment securities - available-for-sale 3 515 515 456 456 Investment securities - held-to-maturity 2 66,196 66,426 54,645 54,429 Federal Home Loan Bank stock 2 3,855 3,855 3,250 3,250 Net loans 3 573,705 570,439 485,900 484,704 Accrued interest receivable 1 3,047 3,047 2,532 2,532 Financial liabilities: Demand Deposits, Savings, NOW and MMDA 1 $ 510,176 $ 510,176 $ 421,627 $ 421,627 Time Deposits 2 213,427 212,453 189,356 189,197 Borrowings 2 73,888 73,575 58,947 58,918 Subordinated loans 2 15,059 14,953 15,025 14,310 Accrued interest payable 1 186 186 75 75

Parent Company - Financial In54

Parent Company - Financial Information (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Schedule of Condensed Financial Information	The following represents the condensed financial information of Pathfinder Bancorp, Inc. as of and for the years ended December 31: Statements of Condition 2017 2016 (In thousands) Assets Cash $ 5,004 $ 5,424 Investments 515 455 Investment in bank subsidiary 71,883 67,281 Investment in non-bank subsidiary 155 155 Other assets 117 475 Total assets $ 77,674 $ 73,790 Liabilities and Shareholders' Equity Accrued liabilities $ 471 $ 404 Subordinated loans 15,059 15,025 Shareholders' equity 62,144 58,361 Total liabilities and shareholders' equity $ 77,674 $ 73,790 Statements of Income 2017 2016 (In thousands) Income Dividends from non-bank subsidiary $ 4 $ 4 Realized gains on available-for sale investment securities 428 108 Operating, net 15 - Total income 447 112 Expenses Interest 1,371 880 Operating, net 169 230 Total expenses 1,540 1,110 Loss before taxes and equity in undistributed net income of subsidiaries (1,093 ) (998 ) Tax benefit 262 254 Loss before equity in undistributed net income of subsidiaries (831 ) (744 ) Equity in undistributed net income of subsidiaries 4,322 4,016 Net income $ 3,491 $ 3,272 Statements of Cash Flows 2017 2016 (In thousands) Operating Activities Net Income $ 3,491 $ 3,272 Equity in undistributed net income of subsidiaries (4,322 ) (4,016 ) Realized gains on available-for-sale investment securities - (23 ) Stock based compensation and ESOP expense 712 557 Amortization of deferred financing from subordinated loan 34 34 Net change in other assets and liabilities 822 (152 ) Net cash flows from operating activities 737 (328 ) Investing Activities Purchase investments - (130 ) Net gain on hedging transaction (428 ) (85 ) Proceeds from sale of investment - 43 Net cash flows from investing activities (428 ) (172 ) Financing activities Redemption of preferred stock - SBLF - (13,000 ) Proceeds from exercise of stock options 155 143 Purchase of common stock - (1,755 ) Cash dividends paid to preferred shareholders - (16 ) Cash dividends paid to common shareholders (884 ) (866 ) Net cash flows from financing activities (729 ) (15,494 ) Change in cash and cash equivalents (420 ) (15,994 ) Cash and cash equivalents at beginning of year 5,424 21,418 Cash and cash equivalents at end of year $ 5,004 $ 5,424

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Schedule of Loans to Related Parties	The following represents the activity associated with loans to related parties during the year ended December 31, 2017: (In thousands) Balance at the beginning of the year $ 10,884 Originations and Officer additions 2,287 Principal payments (3,899 ) Balance at the end of the year $ 9,272

Accumulated Other Comprehensi56

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2017
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax	Changes in the components of accumulated other comprehensive income (loss) (“AOCI”), net of tax, for the periods indicated are summarized in the table below. For the years ended December 31, 2017 (In thousands) Retirement Plans Unrealized Gains and Losses on Financial Derivative Unrealized Gains and Losses on Available-for- Sale Securities Unrealized Loss on Securities Transferred to Held-to- Maturity Total Beginning balance $ (1,513 ) $ - $ (1,845 ) $ (464 ) $ (3,822 ) Other comprehensive income before reclassifications (379 ) - 872 115 608 Amounts reclassified from AOCI 89 - (293 ) - (204 ) Reclassification of effect of tax rate change (1) (417 ) - (292 ) (81 ) (790 ) Ending balance $ (2,220 ) $ - $ (1,558 ) $ (430 ) $ (4,208 ) (1) Reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the newly enacted Federal corporate income tax rate reduction from 34% to 21%. For the years ended December 31, 2016 (In thousands) Retirement Plans Unrealized Gains and Losses on Financial Derivative Unrealized Gains and Losses on Available-for- Sale Securities Unrealized Loss on Securities Transferred to Held-to- Maturity Total Beginning balance $ (1,844 ) $ (16 ) $ (51 ) $ (654 ) (2,565 ) Other comprehensive income before reclassifications 198 1 (1,436 ) 190 (1,047 ) Amounts reclassified from AOCI 133 15 (358 ) - (210 ) Ending balance $ (1,513 ) $ - $ (1,845 ) $ (464 ) $ (3,822 )
Schedule of Amounts Reclassified Out of Each Component of AOCI	The following table presents the amounts reclassified out of each component of AOCI for the indicated annual period: (In thousands) For the years ended Details about AOCI 1 December 31, 2017 December 31, 2016 Affected Line Item in the Statement of Income Unrealized holding gain on financial derivative: Reclassification adjustment for interest expense included in net income $ - $ (25 ) Interest on long term borrowings - 10 Provision for income taxes $ - $ (15 ) Net Income Retirement plan items Retirement plan net losses recognized in plan expenses 2 $ (150 ) $ (222 ) Salaries and employee benefits 61 89 Provision for income taxes $ (89 ) $ (133 ) Net Income Available-for-sale securities Realized gain on sale of securities $ 489 $ 594 Net gains on sales and redemptions of investment securities (196 ) (236 ) Provision for income taxes $ 293 $ 358 Net Income

Summary of Significant Accoun57

Summary of Significant Accounting Policies - Additional Information (Details)	Oct. 16, 2014USD ($)$ / sharesshares	Dec. 31, 2017USD ($)SubsidiaryOfficeshares	Dec. 31, 2018	Dec. 31, 2017USD ($)SubsidiaryOfficeshares	Dec. 31, 2016USD ($)shares	Dec. 31, 2014shares
Nature of Operations [Abstract]
Common stock, shares outstanding (in shares) | shares		4,280,227		4,280,227	4,236,744	4,353,850
Number of wholly-owned subsidiaries | Subsidiary		2		2
Consolidation of membership interest in Fitzgibbons		100.00%		100.00%
Number of offices located In Oswego County | Office		7		7
Number of offices located in Onondaga County | Office		2		2
Number of loan production office located in Oneida County | Office		1		1
Significant Group Concentrations of Credit Risk [Abstract]
Minimum commercial real estate loans amount required for additional review		$ 400,000		$ 400,000
Cash and Cash Equivalents [Abstract]
Maturity period for classification as cash and cash equivalents, maximum				3 months
Allowance for Loan Losses [Abstract]
Maximum percentage for estimating specific and general losses		10.00%		10.00%
Minimum amount, of residential mortgage loans threshold for evaluations of impairment		$ 300,000		$ 300,000
Income Recognition on Impaired and Non-accrual Loans [Abstract]
Number of consecutive months of current payments before non-accrual troubled debt restructured loans are restored to accrual status				6 months
Goodwill and Intangible Assets [Abstract]
Estimated useful life				15 years
Derivative Financial Instruments [Abstract]
Number of interest rate swaps				1
Proceeds from sale of U.S. Treasury securities				$ 40,000,000	$ 25,000,000
Repurchase agreement period				30 days	30 days
Realized gains on hedging activity				$ 428,000	$ 85,000
INCOME TAXES [Abstract]
Federal corporate income tax rate				34.00%	34.00%
Tax cuts and jobs act of 2017 change in tax rate income tax expense (benefit)		$ (155,000)
Scenario, Plan [Member]
INCOME TAXES [Abstract]
Federal corporate income tax rate			21.00%
Maximum [Member] | Premises [Member]
Premises and Equipment [Abstract]
Useful life				40 years
Maximum [Member] | Equipment [Member]
Premises and Equipment [Abstract]
Useful life				10 years
Pathfinder Bank [Member]
Nature of Operations [Abstract]
Number of shares of common stock sold (in shares) | shares	2,636,053
Common stock sold per share (in dollar per share) | $ / shares	$ 10
Gross offering proceeds of common stock	$ 26,400,000
Cash received from acquisition	197,000
Conversion related expenses	1,500,000
Amount received of net proceeds	$ 24,900,000			$ 0	$ (1,755,000)
Ratio of conversion of shares	1.6472
Derivative Financial Instruments [Abstract]
Realized gains on hedging activity				$ 428,000	$ 85,000
Pathfinder Bank [Member] | Employee Stock Ownership Plan (ESOP) [Member]
Nature of Operations [Abstract]
Number of shares of common stock sold (in shares) | shares	105,442
FitzGibbons Agency LLC [Member] | Pathfinder Risk Management Company Inc [Member]
Nature of Operations [Abstract]
Membership interest own in Fitzgibbons through subsidiary		51.00%		51.00%
Noncontrolling interest by subsidiary		49.00%		49.00%

Summary of Significant Accoun58

Summary of Significant Accounting Policies - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Abstract]
Unrealized loss for pension and other postretirement obligations	$ (3,003)	$ (2,520)
Tax effect	783	1,007
Net unrealized loss for pension and other postretirement obligations	(2,220)	(1,513)
Unrealized loss on available-for-sale securities	(2,108)	(3,072)
Tax effect	550	1,227
Net unrealized loss on available-for-sale securities	(1,558)	(1,845)
Unrealized loss on securities transferred to held-to-maturity	(585)	(774)
Tax effect	155	310
Net unrealized loss on securities transferred to held-to-maturity	(430)	(464)
Accumulated other comprehensive loss	$ (4,208)	$ (3,822)

Summary of Significant Accoun59

Summary of Significant Accounting Policies - Schedule of Accumulated Other Comprehensive Loss (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Federal corporate income tax rate		34.00%	34.00%
Scenario, Plan [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Federal corporate income tax rate	21.00%

New Accounting Pronouncements -

New Accounting Pronouncements - Additional Information (Details) - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income to retained earnings	[1]		$ (790,000)
Federal corporate income tax rate			34.00%	34.00%
Minimum lease payments under noncancelable operating lease agreements			$ 1,139,000
Lessee, Operating Lease, Term of Contract			12 months
Retained Earnings [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income to retained earnings	[1]		$ 790,000
Accumulated Other Comprehensive Loss [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income to retained earnings	[1]		(790,000)
Scenario, Plan [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Federal corporate income tax rate		21.00%
ASU 2016-09 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reduction of income tax adoption of new accounting pronouncement			37,000
Tax Cut and Jobs Act [Member] | Scenario, Plan [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Federal corporate income tax rate		21.00%
ASU 2014-09 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Expense recognized on credit card rewards in other costs of operations			94,000	$ 111,000
ASU 2016-01 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Fair value on marketable equity securities			515,000
ASU 2016-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Minimum lease payments under noncancelable operating lease agreements			$ 1,100,000
[1]	Reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the newly enacted Federal corporate income tax rate reduction from 34% to 21%.

Earnings per Share - Additional

Earnings per Share - Additional Information (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock options (in shares)	23,065	214,415

Earnings per Share - Calculatio

Earnings per Share - Calculations of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Basic Earnings Per Common Share [Abstract]
Net income available to common shareholders	$ 3,491	$ 3,256
Weighted average common shares outstanding (in shares)	4,081	4,105
Earnings per common share - basic	$ 0.86	$ 0.79
Diluted Earnings Per Common Share [Abstract]
Net income available to common shareholders	$ 3,491	$ 3,256
Weighted average common shares outstanding (in shares)	4,081	4,105
Effect of assumed exercise of stock options (in shares)	108	85
Diluted weighted average common shares outstanding (in shares)	4,189	4,190
Earnings per common share - diluted	$ 0.83	$ 0.78

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	$ 172,583
Total investment securities, amortized cost basis	173,246	$ 145,020
Gross Unrealized Gains	290	117
Gross Unrealized Losses	(2,398)	(3,182)
Estimated Fair Value	171,138	141,955
Held-to-maturity securities, debt maturities, Amortized Cost	66,196	54,645
Held to maturity, gross unrealized gains	949
Held to maturity, gross unrealized losses	(719)
Held-to-maturity Securities, Debt Maturities, Fair Value	66,426	54,429
US Treasury, Agencies and GSEs [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	41,489	24,263
Gross Unrealized Gains, Debt investment securities	1	1
Gross Unrealized Losses, Debt investment securities	(154)	(80)
Available-for-sale Securities, Debt investment securities	41,336	24,184
Held-to-maturity securities, debt maturities, Amortized Cost	4,948
Held to maturity, gross unrealized gains	14
Held to maturity, gross unrealized losses	(14)
Held-to-maturity Securities, Debt Maturities, Fair Value	4,948
State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	13,960	17,185
Gross Unrealized Gains, Debt investment securities	12	33
Gross Unrealized Losses, Debt investment securities	(291)	(737)
Available-for-sale Securities, Debt investment securities	13,681	16,481
Held-to-maturity securities, debt maturities, Amortized Cost	35,130
Held to maturity, gross unrealized gains	641
Held to maturity, gross unrealized losses	(311)
Held-to-maturity Securities, Debt Maturities, Fair Value	35,460
Corporate [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	8,584	15,560
Gross Unrealized Gains, Debt investment securities	108	20
Gross Unrealized Losses, Debt investment securities	(92)	(385)
Available-for-sale Securities, Debt investment securities	8,600	15,195
Held-to-maturity securities, debt maturities, Amortized Cost	8,311
Held to maturity, gross unrealized gains	151
Held to maturity, gross unrealized losses	(159)
Held-to-maturity Securities, Debt Maturities, Fair Value	8,303
Asset Backed Securities [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	6,662	6,696
Gross Unrealized Gains, Debt investment securities	12	5
Gross Unrealized Losses, Debt investment securities	(30)	(37)
Available-for-sale Securities, Debt investment securities	6,644	6,664
Residential Mortgage-Backed - US Agency [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	36,214	31,204
Gross Unrealized Gains, Debt investment securities	23	0
Gross Unrealized Losses, Debt investment securities	(495)	(638)
Available-for-sale Securities, Debt investment securities	35,742	30,566
Held-to-maturity securities, debt maturities, Amortized Cost	6,853
Held to maturity, gross unrealized gains	53
Held to maturity, gross unrealized losses	(10)
Held-to-maturity Securities, Debt Maturities, Fair Value	6,896
Collateralized Mortgage Obligations - US Agency [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	54,481	42,124
Gross Unrealized Gains, Debt investment securities	0	45
Gross Unrealized Losses, Debt investment securities	(1,133)	(1,183)
Available-for-sale Securities, Debt investment securities	53,348	40,986
Held-to-maturity securities, debt maturities, Amortized Cost	7,574
Held to maturity, gross unrealized gains	83
Held to maturity, gross unrealized losses	(215)
Held-to-maturity Securities, Debt Maturities, Fair Value	7,442
Collateralized Mortgage Obligations - Private Label [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	11,193	6,682
Gross Unrealized Gains, Debt investment securities	62	0
Gross Unrealized Losses, Debt investment securities	(203)	(105)
Available-for-sale Securities, Debt investment securities	11,052	6,577
Held-to-maturity securities, debt maturities, Amortized Cost	3,380
Held to maturity, gross unrealized gains	7
Held to maturity, gross unrealized losses	(10)
Held-to-maturity Securities, Debt Maturities, Fair Value	3,377
Debt Securities [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	172,583	143,714
Gross Unrealized Gains, Debt investment securities	218	104
Gross Unrealized Losses, Debt investment securities	(2,398)	(3,165)
Available-for-sale Securities, Debt investment securities	170,403	140,653
Mutual Funds Ultra Short Mortgage Fund [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Amortized cost, equity securities		643
Gross Unrealized Gains, Equity investment securities		0
Gross Unrealized Losses, Equity investment securities		(17)
Available-for-sale Securities, Equity investment securities		626
Mutual funds Common Stock Financial Services Industry [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Amortized cost, equity securities	663	663
Gross Unrealized Gains, Equity investment securities	72	13
Gross Unrealized Losses, Equity investment securities	0	0
Available-for-sale Securities, Equity investment securities	735	676
Equity and Other Investments [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Amortized cost, equity securities	663	1,306
Gross Unrealized Gains, Equity investment securities	72	13
Gross Unrealized Losses, Equity investment securities	0	(17)
Available-for-sale Securities, Equity investment securities	$ 735	$ 1,302

Investment Securities - Additio

Investment Securities - Additional Information (Details)	12 Months Ended
	Dec. 31, 2017USD ($)Security	Dec. 31, 2016USD ($)Security
Gain (Loss) on Sale of Investments [Abstract]
Proceeds on sales and redemptions of securities	$ 67,600,000	$ 33,200,000
Securities pledged to collateralize deposit	113,000,000	96,400,000
Securities pledged to collateralize borrowing	$ 19,900,000	$ 12,900,000
Collateralized Mortgage Obligations of Private Label [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities | Security	17	7
Asset Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities | Security	6	5
Number of securities in unrealized loss positions | Security	3	3
Total Fair Value	$ 3,865,000	$ 4,455,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Total Unrealized Losses	(30,000)	(37,000)
Seven Private-Label Mortgage-Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment securities, aggregate book value	25,200,000	9,800,000
Five Private-Label Asset - Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Investment securities, aggregate book value	$ 6,000,000	$ 6,700,000
Municipal Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Months of unrealized loss positions	12 months
Equity and Other Investments [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions | Security		1
Total Fair Value	$ 19,000	$ 626,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Total Unrealized Losses		$ (17,000)

Investment Securities - Amort65

Investment Securities - Amortized Cost and Estimated Fair Value of Debt Investments by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available-for-sale securities, debt maturities, amortized cost [Abstract]
Due in one year or less	$ 21,555
Due after one year through five years	28,957
Due after five years through ten years	11,587
Due after ten years	8,596
Sub-total	70,695
Amortized cost	172,583
Available-for-sale securities, debt maturities, Estimated Fair Value [Abstract]
Due in one year or less	21,506
Due after one year through five years	28,830
Due after five years through ten years	11,642
Due after ten years	8,283
Sub-total	70,261
Available-for-sale securities, debt maturities, fair value, totals	170,403
Held-to-maturity Securities, debt maturities, amortized cost [Abstract]
Due in one year or less	1,680
Due after one year through five years	11,381
Due after five years through ten years	16,993
Due after ten years	18,335
Sub-total	48,389
Held-to-maturity securities, debt maturities, Amortized Cost	66,196	$ 54,645
Held-to-maturity Securities, debt maturities, Estimated Fair Value [Abstract]
Due in one year or less	1,680
Due after one year through five years	11,488
Due after five years through ten years	17,479
Due after ten years	18,064
Sub-total	48,711
Held-to-maturity securities at fair value	66,426	54,429
Residential Mortgage-Backed - US Agency [Member]
Available-for-sale securities, debt maturities, amortized cost [Abstract]
Amortized cost	36,214	31,204
Available-for-sale securities, debt maturities, Estimated Fair Value [Abstract]
Available-for-sale securities, debt maturities, fair value, totals	35,742
Held-to-maturity Securities, debt maturities, amortized cost [Abstract]
Held-to-maturity securities, debt maturities, Amortized Cost	6,853
Held-to-maturity Securities, debt maturities, Estimated Fair Value [Abstract]
Held-to-maturity securities at fair value	6,896
Collateralized Mortgage Obligations - US Agency [Member]
Available-for-sale securities, debt maturities, amortized cost [Abstract]
Amortized cost	54,481	42,124
Available-for-sale securities, debt maturities, Estimated Fair Value [Abstract]
Available-for-sale securities, debt maturities, fair value, totals	53,348
Held-to-maturity Securities, debt maturities, amortized cost [Abstract]
Held-to-maturity securities, debt maturities, Amortized Cost	7,574
Held-to-maturity Securities, debt maturities, Estimated Fair Value [Abstract]
Held-to-maturity securities at fair value	7,442
Collateralized Mortgage Obligations - Private Label [Member]
Available-for-sale securities, debt maturities, amortized cost [Abstract]
Amortized cost	11,193	$ 6,682
Available-for-sale securities, debt maturities, Estimated Fair Value [Abstract]
Available-for-sale securities, debt maturities, fair value, totals	11,052
Held-to-maturity Securities, debt maturities, amortized cost [Abstract]
Held-to-maturity securities, debt maturities, Amortized Cost	3,380
Held-to-maturity Securities, debt maturities, Estimated Fair Value [Abstract]
Held-to-maturity securities at fair value	$ 3,377

Investment Securities - Investm

Investment Securities - Investment Securities' Gross Unrealized Losses and Fair Value by Investment Category and Length of Time that Individual Securities Have Continuous Unrealized Loss Position (Details)	Dec. 31, 2017USD ($)Security	Dec. 31, 2016USD ($)Security
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	18	26
Number of securities in unrealized loss positions, twelve months or more | Security	13	0
Number of securities in unrealized loss positions | Security	31	26
Less than twelve months Fair Value	$ 16,516,000	$ 18,687,000
Twelve months or more Fair Value	11,719,000	0
Total Fair Value	28,235,000	18,687,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(302,000)	(1,030,000)
Twelve months or more Unrealized Losses	(417,000)	0
Total Unrealized Losses	$ (719,000)	$ (1,030,000)
US Treasury, Agencies and GSEs [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	5	6
Number of securities in unrealized loss positions, twelve months or more | Security	4	0
Number of securities in unrealized loss positions | Security	9	6
Less than twelve months Fair Value	$ 27,359,000	$ 22,161,000
Twelve months or more Fair Value	13,957,000	0
Total Fair Value	41,316,000	22,161,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(105,000)	(80,000)
Twelve months or more Unrealized Losses	(49,000)	0
Total Unrealized Losses	$ (154,000)	$ (80,000)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	2	1
Number of securities in unrealized loss positions, twelve months or more | Security	1	0
Number of securities in unrealized loss positions | Security	3	1
Less than twelve months Fair Value	$ 1,990,000	$ 982,000
Twelve months or more Fair Value	988,000	0
Total Fair Value	2,978,000	982,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(2,000)	(18,000)
Twelve months or more Unrealized Losses	(12,000)	0
Total Unrealized Losses	$ (14,000)	$ (18,000)
State and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	18	53
Number of securities in unrealized loss positions, twelve months or more | Security	12	0
Number of securities in unrealized loss positions | Security	30	53
Less than twelve months Fair Value	$ 2,480,000	$ 14,057,000
Twelve months or more Fair Value	5,041,000	0
Total Fair Value	7,521,000	14,057,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(24,000)	(737,000)
Twelve months or more Unrealized Losses	(267,000)	0
Total Unrealized Losses	$ (291,000)	$ (737,000)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	8	16
Number of securities in unrealized loss positions, twelve months or more | Security	11	0
Number of securities in unrealized loss positions | Security	19	16
Less than twelve months Fair Value	$ 5,668,000	$ 10,038,000
Twelve months or more Fair Value	8,644,000	0
Total Fair Value	14,312,000	10,038,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(55,000)	(693,000)
Twelve months or more Unrealized Losses	(256,000)	0
Total Unrealized Losses	$ (311,000)	$ (693,000)
Corporate [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	2	10
Number of securities in unrealized loss positions, twelve months or more | Security	1	0
Number of securities in unrealized loss positions | Security	3	10
Less than twelve months Fair Value	$ 1,791,000	$ 10,587,000
Twelve months or more Fair Value	1,727,000	0
Total Fair Value	3,518,000	10,587,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(19,000)	(385,000)
Twelve months or more Unrealized Losses	(73,000)	0
Total Unrealized Losses	$ (92,000)	$ (385,000)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	3	5
Number of securities in unrealized loss positions, twelve months or more | Security	1	0
Number of securities in unrealized loss positions | Security	4	5
Less than twelve months Fair Value	$ 1,412,000	$ 4,402,000
Twelve months or more Fair Value	2,087,000	0
Total Fair Value	3,499,000	4,402,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(10,000)	(228,000)
Twelve months or more Unrealized Losses	(149,000)	0
Total Unrealized Losses	$ (159,000)	$ (228,000)
Asset Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	2	3
Number of securities in unrealized loss positions, twelve months or more | Security	1	0
Number of securities in unrealized loss positions | Security	3	3
Less than twelve months Fair Value	$ 3,123,000	$ 4,455,000
Twelve months or more Fair Value	742,000	0
Total Fair Value	3,865,000	4,455,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(17,000)	(37,000)
Twelve months or more Unrealized Losses	(13,000)	0
Total Unrealized Losses	(30,000)	$ (37,000)
Equity and Other Investments [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security		1
Number of securities in unrealized loss positions, twelve months or more | Security		0
Number of securities in unrealized loss positions | Security		1
Less than twelve months Fair Value		$ 626,000
Twelve months or more Fair Value		0
Total Fair Value	$ 19,000	626,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses		(17,000)
Twelve months or more Unrealized Losses		0
Total Unrealized Losses		$ (17,000)
Residential Mortgage-Backed - US Agency [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	15	23
Number of securities in unrealized loss positions, twelve months or more | Security	9	0
Number of securities in unrealized loss positions | Security	24	23
Less than twelve months Fair Value	$ 21,551,000	$ 29,849,000
Twelve months or more Fair Value	10,463,000	0
Total Fair Value	32,014,000	29,849,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(159,000)	(638,000)
Twelve months or more Unrealized Losses	(336,000)	0
Total Unrealized Losses	$ (495,000)	$ (638,000)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	2	3
Number of securities in unrealized loss positions, twelve months or more | Security	0	0
Number of securities in unrealized loss positions | Security	2	3
Less than twelve months Fair Value	$ 1,909,000	$ 1,869,000
Twelve months or more Fair Value	0	0
Total Fair Value	1,909,000	1,869,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(10,000)	(20,000)
Twelve months or more Unrealized Losses	0	0
Total Unrealized Losses	$ (10,000)	$ (20,000)
Collateralized Mortgage Obligations - US Agency [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	14	28
Number of securities in unrealized loss positions, twelve months or more | Security	21	4
Number of securities in unrealized loss positions | Security	35	32
Less than twelve months Fair Value	$ 23,790,000	$ 33,376,000
Twelve months or more Fair Value	25,395,000	2,514,000
Total Fair Value	49,185,000	35,890,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(195,000)	(1,087,000)
Twelve months or more Unrealized Losses	(938,000)	(96,000)
Total Unrealized Losses	$ (1,133,000)	$ (1,183,000)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	2
Number of securities in unrealized loss positions, twelve months or more | Security	0
Number of securities in unrealized loss positions | Security	2
Less than twelve months Fair Value	$ 4,418,000
Twelve months or more Fair Value	0
Total Fair Value	4,418,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(215,000)
Twelve months or more Unrealized Losses	0
Total Unrealized Losses	$ (215,000)
Collateralized Mortgage Obligations - Private Label [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	4	5
Number of securities in unrealized loss positions, twelve months or more | Security	0	0
Number of securities in unrealized loss positions | Security	4	5
Less than twelve months Fair Value	$ 7,439,000	$ 6,577,000
Twelve months or more Fair Value	0	0
Total Fair Value	7,439,000	6,577,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(203,000)	(105,000)
Twelve months or more Unrealized Losses	0	0
Total Unrealized Losses	$ (203,000)	$ (105,000)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	1	1
Number of securities in unrealized loss positions, twelve months or more | Security	0	0
Number of securities in unrealized loss positions | Security	1	1
Less than twelve months Fair Value	$ 1,119,000	$ 1,396,000
Twelve months or more Fair Value	0	0
Total Fair Value	1,119,000	1,396,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(10,000)	(71,000)
Twelve months or more Unrealized Losses	0	0
Total Unrealized Losses	$ (10,000)	$ (71,000)
Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Number of securities in unrealized loss positions, less than twelve months | Security	60	129
Number of securities in unrealized loss positions, twelve months or more | Security	48	4
Number of securities in unrealized loss positions | Security	108	133
Less than twelve months Fair Value	$ 87,533,000	$ 121,688,000
Twelve months or more Fair Value	57,325,000	2,514,000
Total Fair Value	144,858,000	124,202,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than twelve months Unrealized Losses	(722,000)	(3,086,000)
Twelve months or more Unrealized Losses	(1,676,000)	(96,000)
Total Unrealized Losses	$ (2,398,000)	$ (3,182,000)

Investment Securities - Gross R

Investment Securities - Gross Realized Gains (Losses) on Sale of Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Gain Loss On Sale Of Investments [Abstract]
Realized gains on investments	$ 427	$ 526
Realized gains on hedging activity	428	85
Realized losses on investments	(366)	(17)
Total	$ 489	$ 594

Loans - Major Classification of

Loans - Major Classification of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	$ 581,244	$ 492,612
Net deferred loan fees	(413)	(465)
Less allowance for loan losses	(7,126)	(6,247)
Loans receivable, net	573,705	485,900
Residential Mortgage Loans [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	222,351	207,505
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	216,793	199,000
Residential Mortgage Loans [Member] | Construction [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	5,558	8,505
Commercial Loans [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	304,312	254,092
Commercial Loans [Member] | Real Estate [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	192,525	150,698
Commercial Loans [Member] | Lines of Credit [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	51,131	50,477
Commercial Loans [Member] | Other Commercial and Industrial [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	50,251	40,394
Commercial Loans [Member] | Tax Exempt Loans [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	10,405	12,523
Consumer Loans [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	54,581	31,015
Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	25,935	24,722
Consumer Loans [Member] | Other Consumer [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Total loans	$ 28,646	$ 6,293

Loans - Additional Information

Loans - Additional Information (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2017USD ($)Loan	Dec. 31, 2016USD ($)Loan	Apr. 30, 2017USD ($)	Jan. 31, 2017USD ($)
Accounts Notes And Loans Receivable [Line Items]
Loans acquired				$ 10,200,000	$ 15,600,000
Participating interest of acquired loan percentage		90.00%
Number of loans secured by liens on automobiles | Loan		1,231
Number of loans outstanding | Loan		1,082
Loans acquired carrying amount		$ 19,600,000
Number of acquired loan charged-off as uncollectible | Loan		2
Acquired loans charged-off as uncollectible		$ 44,800
Notes, Loans and Financing Receivable, Net [Abstract]
Ninety days past due and still accruing interest	$ 0	0	$ 0
Impairment of provision for loan losses	29,000	$ 388,000	$ 304,000
Troubled Debt Restructuring During Prior Twelve Months [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Number of loans subsequently defaulted | Loan		0	0
Real Estate [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Percentage of total loan portfolio		76.00%	78.00%
Impairment of provision for loan losses		$ 247,000	$ 161,000
Residential Mortgage Loans [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Residential mortgage loans pledged to FHLBNY as blanket collateral	$ 140,300,000	$ 148,100,000	$ 140,300,000
Number of loans | Loan			3
Pre-modification recorded investment			$ 127,000
Post-modification recorded investment			$ 135,000
Commercial Loans [Member] | Real Estate [Member]
Notes, Loans and Financing Receivable, Net [Abstract]
Number of loans | Loan		1	1
Pre-modification recorded investment		$ 2,000,000	$ 2,088,000
Post-modification recorded investment		$ 2,000,000	$ 2,088,000
Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity period of acquired loans		2 years
Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity period of acquired loans		6 years

Loans - Credit Quality Indicato

Loans - Credit Quality Indicator (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Number of consecutive months current before loan is upgraded	6 months	6 months
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Number of consecutive months current before loan is upgraded	6 months	6 months
Residential Mortgage and Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Number of days past due before a loan is classified as Special Mention	60 days	60 days
Number of days past due before a loan is classified as Substandard	90 days	90 days

Loans - Summary of Classes of L

Loans - Summary of Classes of Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 581,244	$ 492,612
Residential Mortgage Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	222,351	207,505
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	216,793	199,000
Residential Mortgage Loans [Member] | Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	5,558	8,505
Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	304,312	254,092
Commercial Loans [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	192,525	150,698
Commercial Loans [Member] | Lines of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	51,131	50,477
Commercial Loans [Member] | Other Commercial and Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	50,251	40,394
Commercial Loans [Member] | Tax Exempt Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	10,405	12,523
Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	54,581	31,015
Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	25,935	24,722
Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	28,646	6,293
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	568,086	477,138
Pass [Member] | Residential Mortgage Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	217,383	202,882
Pass [Member] | Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	211,825	194,377
Pass [Member] | Residential Mortgage Loans [Member] | Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	5,558	8,505
Pass [Member] | Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	296,723	244,069
Pass [Member] | Commercial Loans [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	187,073	143,126
Pass [Member] | Commercial Loans [Member] | Lines of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	50,353	49,393
Pass [Member] | Commercial Loans [Member] | Other Commercial and Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	48,892	39,027
Pass [Member] | Commercial Loans [Member] | Tax Exempt Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	10,405	12,523
Pass [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	53,980	30,187
Pass [Member] | Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	25,396	23,963
Pass [Member] | Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	28,584	6,224
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	2,981	6,691
Special Mention [Member] | Residential Mortgage Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	891	1,445
Special Mention [Member] | Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	891	1,445
Special Mention [Member] | Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,974	5,059
Special Mention [Member] | Commercial Loans [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,372	3,714
Special Mention [Member] | Commercial Loans [Member] | Lines of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	195	684
Special Mention [Member] | Commercial Loans [Member] | Other Commercial and Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	407	661
Special Mention [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	116	187
Special Mention [Member] | Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	61	170
Special Mention [Member] | Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	55	17
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	5,259	7,472
Substandard [Member] | Residential Mortgage Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,869	2,115
Substandard [Member] | Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,869	2,115
Substandard [Member] | Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	3,079	4,960
Substandard [Member] | Commercial Loans [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	2,024	3,858
Substandard [Member] | Commercial Loans [Member] | Lines of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	523	400
Substandard [Member] | Commercial Loans [Member] | Other Commercial and Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	532	702
Substandard [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	311	397
Substandard [Member] | Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	304	389
Substandard [Member] | Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	7	8
Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	4,918	1,311
Doubtful [Member] | Residential Mortgage Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	2,208	1,063
Doubtful [Member] | Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	2,208	1,063
Doubtful [Member] | Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	2,536	4
Doubtful [Member] | Commercial Loans [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	2,056
Doubtful [Member] | Commercial Loans [Member] | Lines of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	60
Doubtful [Member] | Commercial Loans [Member] | Other Commercial and Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	420	4
Doubtful [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	174	244
Doubtful [Member] | Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 174	200
Doubtful [Member] | Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans		$ 44

Loans - Age Analysis of Past Du

Loans - Age Analysis of Past Due Loans Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Recorded Investment, Past Due [Line Items]
Total Past Due	$ 12,349	$ 9,763
Current	568,895	482,849
Total Loans Receivable	581,244	492,612
30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	4,259	3,575
60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	3,196	1,377
90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	4,894	4,811
Residential Mortgage Loans [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	4,209	4,639
Current	218,142	202,866
Total Loans Receivable	222,351	207,505
Residential Mortgage Loans [Member] | 30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	1,196	1,247
Residential Mortgage Loans [Member] | 60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	925	832
Residential Mortgage Loans [Member] | 90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	2,088	2,560
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	4,209	4,639
Current	212,584	194,361
Total Loans Receivable	216,793	199,000
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member] | 30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	1,196	1,247
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member] | 60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	925	832
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member] | 90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	2,088	2,560
Residential Mortgage Loans [Member] | Construction [Member]
Recorded Investment, Past Due [Line Items]
Current	5,558	8,505
Total Loans Receivable	5,558	8,505
Commercial Loans [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	7,367	4,453
Current	296,945	249,639
Total Loans Receivable	304,312	254,092
Commercial Loans [Member] | 30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	2,777	2,215
Commercial Loans [Member] | 60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	2,147	375
Commercial Loans [Member] | 90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	2,443	1,863
Commercial Loans [Member] | Real Estate [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	4,321	2,661
Current	188,204	148,037
Total Loans Receivable	192,525	150,698
Commercial Loans [Member] | Real Estate [Member] | 30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	720	1,063
Commercial Loans [Member] | Real Estate [Member] | 60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	2,056	375
Commercial Loans [Member] | Real Estate [Member] | 90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	1,545	1,223
Commercial Loans [Member] | Lines of Credit [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	1,645	819
Current	49,486	49,658
Total Loans Receivable	51,131	50,477
Commercial Loans [Member] | Lines of Credit [Member] | 30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	1,482	819
Commercial Loans [Member] | Lines of Credit [Member] | 60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	31
Commercial Loans [Member] | Lines of Credit [Member] | 90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	132
Commercial Loans [Member] | Other Commercial and Industrial [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	1,401	973
Current	48,850	39,421
Total Loans Receivable	50,251	40,394
Commercial Loans [Member] | Other Commercial and Industrial [Member] | 30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	575	333
Commercial Loans [Member] | Other Commercial and Industrial [Member] | 60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	60
Commercial Loans [Member] | Other Commercial and Industrial [Member] | 90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	766	640
Commercial Loans [Member] | Tax Exempt Loans [Member]
Recorded Investment, Past Due [Line Items]
Current	10,405	12,523
Total Loans Receivable	10,405	12,523
Consumer Loans [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	773	671
Current	53,808	30,344
Total Loans Receivable	54,581	31,015
Consumer Loans [Member] | 30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	286	113
Consumer Loans [Member] | 60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	124	170
Consumer Loans [Member] | 90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	363	388
Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	468	600
Current	25,467	24,122
Total Loans Receivable	25,935	24,722
Consumer Loans [Member] | Home Equity and Junior Liens [Member] | 30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	94	105
Consumer Loans [Member] | Home Equity and Junior Liens [Member] | 60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	74	157
Consumer Loans [Member] | Home Equity and Junior Liens [Member] | 90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	300	338
Consumer Loans [Member] | Other Consumer [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	305	71
Current	28,341	6,222
Total Loans Receivable	28,646	6,293
Consumer Loans [Member] | Other Consumer [Member] | 30-59 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	192	8
Consumer Loans [Member] | Other Consumer [Member] | 60-89 Days Past Due And Accruing [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	50	13
Consumer Loans [Member] | Other Consumer [Member] | 90 Days and Over [Member]
Recorded Investment, Past Due [Line Items]
Total Past Due	$ 63	$ 50

Loans - Nonaccrual Loans Segreg

Loans - Nonaccrual Loans Segregated by Class of Loan (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	$ 4,894	$ 4,811
Residential Mortgage Loans [Member]
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	2,088	2,560
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	2,088	2,560
Commercial Loans [Member]
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	2,443	1,863
Commercial Loans [Member] | Real Estate [Member]
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	1,545	1,223
Commercial Loans [Member] | Lines of Credit [Member]
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	132
Commercial Loans [Member] | Other Commercial and Industrial [Member]
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	766	640
Consumer Loans [Member]
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	363	388
Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	300	338
Consumer Loans [Member] | Other Consumer [Member]
Nonaccrual loans, Segregated by class of loans [Abstract]
Nonaccrual status loans	$ 63	$ 50

Loans - Troubled Debt Restructu

Loans - Troubled Debt Restructurings on Financing Receivables (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Loan	Dec. 31, 2016USD ($)Loan
Residential Mortgage Loans [Member]
Troubled Debt Restructuring, Modified [Abstract]
Number of loans | Loan		3
Pre-modification outstanding recorded investment		$ 127
Post-modification outstanding recorded investment		135
Additional provision for loan losses		$ 29
Commercial Loans [Member] | Real Estate [Member]
Troubled Debt Restructuring, Modified [Abstract]
Number of loans | Loan	1	1
Pre-modification outstanding recorded investment	$ 2,000	$ 2,088
Post-modification outstanding recorded investment	$ 2,000	$ 2,088

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans Information by Portfolio Class (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
With an allowance recorded [Abstract]
Related Allowance	$ 1,103	$ 1,130
Total [Abstract]
Recorded Investment	9,243	8,592
Unpaid Principal Balance	9,300	8,743
Related Allowance	1,103	1,130
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
With no related allowance recorded [Abstract]
Recorded Investment	900	850
Unpaid Principal Balance	909	857
With an allowance recorded [Abstract]
Recorded Investment	958	763
Unpaid Principal Balance	958	763
Related Allowance	210	117
Total [Abstract]
Recorded Investment	1,858	1,613
Unpaid Principal Balance	1,867	1,620
Related Allowance	210	117
Commercial Loans [Member] | Real Estate [Member]
With no related allowance recorded [Abstract]
Recorded Investment	3,314	4,254
Unpaid Principal Balance	3,360	4,344
With an allowance recorded [Abstract]
Recorded Investment	2,186	818
Unpaid Principal Balance	2,187	872
Related Allowance	320	455
Total [Abstract]
Recorded Investment	5,500	5,072
Unpaid Principal Balance	5,547	5,216
Related Allowance	320	455
Commercial Loans [Member] | Lines of Credit [Member]
With no related allowance recorded [Abstract]
Recorded Investment	507	400
Unpaid Principal Balance	507	400
With an allowance recorded [Abstract]
Recorded Investment	40	0
Unpaid Principal Balance	40	0
Related Allowance	40	0
Total [Abstract]
Recorded Investment	547	400
Unpaid Principal Balance	547	400
Related Allowance	40	0
Commercial Loans [Member] | Other Commercial and Industrial [Member]
With no related allowance recorded [Abstract]
Recorded Investment	523	470
Unpaid Principal Balance	524	470
With an allowance recorded [Abstract]
Recorded Investment	525	552
Unpaid Principal Balance	525	552
Related Allowance	391	553
Total [Abstract]
Recorded Investment	1,048	1,022
Unpaid Principal Balance	1,049	1,022
Related Allowance	391	553
Consumer Loans [Member] | Home Equity and Junior Liens [Member]
With no related allowance recorded [Abstract]
Recorded Investment	80	140
Unpaid Principal Balance	80	140
With an allowance recorded [Abstract]
Recorded Investment	210	345
Unpaid Principal Balance	210	345
Related Allowance	142	5
Total [Abstract]
Recorded Investment	290	485
Unpaid Principal Balance	290	485
Related Allowance	$ 142	$ 5

Loans - Summary of Average Reco

Loans - Summary of Average Recorded Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Average recorded investment [Abstract]
Average recorded investment in impaired loans	$ 8,356	$ 6,632
1-4 Family First Lien Residential Mortgages [Member]
Average recorded investment [Abstract]
Average recorded investment in impaired loans	1,553	777
Commercial Real Estate [Member]
Average recorded investment [Abstract]
Average recorded investment in impaired loans	5,097	4,325
Commercial Lines of Credit [Member]
Average recorded investment [Abstract]
Average recorded investment in impaired loans	447	479
Other Commercial and Industrial [Member]
Average recorded investment [Abstract]
Average recorded investment in impaired loans	976	724
Home Equity and Junior Liens [Member]
Average recorded investment [Abstract]
Average recorded investment in impaired loans	$ 283	325
Other Consumer [Member]
Average recorded investment [Abstract]
Average recorded investment in impaired loans		$ 2

Loans - Schedule of Cash Basis

Loans - Schedule of Cash Basis Interest Income Recognized on Impaired Loans (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Cash Basis Interest Recognized on Impaired Loans [Abstract]
Cash basis interest income recognized on impaired loans	$ 29,000	$ 388,000	$ 304,000
1-4 Family First Lien Residential Mortgages [Member]
Cash Basis Interest Recognized on Impaired Loans [Abstract]
Cash basis interest income recognized on impaired loans		71,000	64,000
Commercial Real Estate [Member]
Cash Basis Interest Recognized on Impaired Loans [Abstract]
Cash basis interest income recognized on impaired loans		247,000	161,000
Commercial Lines of Credit [Member]
Cash Basis Interest Recognized on Impaired Loans [Abstract]
Cash basis interest income recognized on impaired loans		27,000	22,000
Other Commercial and Industrial [Member]
Cash Basis Interest Recognized on Impaired Loans [Abstract]
Cash basis interest income recognized on impaired loans		30,000	44,000
Home Equity and Junior Liens [Member]
Cash Basis Interest Recognized on Impaired Loans [Abstract]
Cash basis interest income recognized on impaired loans		13,000	13,000
Other Consumer [Member]
Cash Basis Interest Recognized on Impaired Loans [Abstract]
Cash basis interest income recognized on impaired loans		$ 0	$ 0

Allowance for Loan Losses - Cha

Allowance for Loan Losses - Changes in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Allowance for loan losses:
Beginning Balance	$ 6,247	$ 5,706
Charge-offs	(964)	(519)
Recoveries	74	107
Provisions (credits)	1,769	953
Ending balance	7,126	6,247
Ending balance: related to loans individually evaluated for impairment	1,103	1,130
Ending balance: related to loans collectively evaluated for impairment	6,023	5,117
Total Loans Receivable	581,244	492,612
Ending balance: individually evaluated for impairment	9,243	8,592
Ending balance: collectively evaluated for impairment	572,001	484,020
Unallocated [Member]
Allowance for loan losses:
Beginning Balance	0	0
Charge-offs	0	0
Recoveries	0	0
Provisions (credits)	0	0
Ending balance	0	0
Ending balance: related to loans individually evaluated for impairment	0	0
Ending balance: related to loans collectively evaluated for impairment	0	0
Residential Mortgage Loans [Member]
Allowance for loan losses:
Total Loans Receivable	222,351	207,505
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Allowance for loan losses:
Beginning Balance	759	581
Charge-offs	(166)	(242)
Recoveries	13	13
Provisions (credits)	259	407
Ending balance	865	759
Ending balance: related to loans individually evaluated for impairment	210	117
Ending balance: related to loans collectively evaluated for impairment	655	642
Total Loans Receivable	216,793	199,000
Ending balance: individually evaluated for impairment	1,858	1,613
Ending balance: collectively evaluated for impairment	214,935	197,387
Residential Mortgage Loans [Member] | Residential Construction Mortgage [Member]
Allowance for loan losses:
Beginning Balance	0	0
Charge-offs	0	0
Recoveries	0	0
Provisions (credits)	0	0
Ending balance	0	0
Ending balance: related to loans individually evaluated for impairment	0	0
Ending balance: related to loans collectively evaluated for impairment	0	0
Total Loans Receivable	5,558	8,505
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	5,558	8,505
Commercial Loans [Member]
Allowance for loan losses:
Total Loans Receivable	304,312	254,092
Commercial Loans [Member] | Real Estate [Member]
Allowance for loan losses:
Beginning Balance	2,935	2,983
Charge-offs	(505)	0
Recoveries	0	6
Provisions (credits)	1,159	(54)
Ending balance	3,589	2,935
Ending balance: related to loans individually evaluated for impairment	320	455
Ending balance: related to loans collectively evaluated for impairment	3,269	2,480
Total Loans Receivable	192,525	150,698
Ending balance: individually evaluated for impairment	5,500	5,072
Ending balance: collectively evaluated for impairment	187,025	145,626
Commercial Loans [Member] | Lines of Credit [Member]
Allowance for loan losses:
Beginning Balance	397	401
Charge-offs	(60)	(69)
Recoveries	0	11
Provisions (credits)	398	54
Ending balance	735	397
Ending balance: related to loans individually evaluated for impairment	40	0
Ending balance: related to loans collectively evaluated for impairment	695	397
Total Loans Receivable	51,131	50,477
Ending balance: individually evaluated for impairment	547	400
Ending balance: collectively evaluated for impairment	50,584	50,077
Commercial Loans [Member] | Other Commercial and Industrial [Member]
Allowance for loan losses:
Beginning Balance	1,658	1,270
Charge-offs	(22)	0
Recoveries	15	14
Provisions (credits)	(437)	374
Ending balance	1,214	1,658
Ending balance: related to loans individually evaluated for impairment	391	553
Ending balance: related to loans collectively evaluated for impairment	823	1,105
Total Loans Receivable	50,251	40,394
Ending balance: individually evaluated for impairment	1,048	1,022
Ending balance: collectively evaluated for impairment	49,203	39,372
Commercial Loans [Member] | Tax Exempt Loans [Member]
Allowance for loan losses:
Beginning Balance	1	3
Charge-offs	0	0
Recoveries	0	0
Provisions (credits)	0	(2)
Ending balance	1	1
Ending balance: related to loans individually evaluated for impairment	0	0
Ending balance: related to loans collectively evaluated for impairment	1	1
Total Loans Receivable	10,405	12,523
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	10,405	12,523
Consumer Loans [Member]
Allowance for loan losses:
Total Loans Receivable	54,581	31,015
Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Allowance for loan losses:
Beginning Balance	331	350
Charge-offs	(69)	(147)
Recoveries	6	10
Provisions (credits)	246	118
Ending balance	514	331
Ending balance: related to loans individually evaluated for impairment	142	5
Ending balance: related to loans collectively evaluated for impairment	372	326
Total Loans Receivable	25,935	24,722
Ending balance: individually evaluated for impairment	290	485
Ending balance: collectively evaluated for impairment	25,645	24,237
Consumer Loans [Member] | Other Consumer [Member]
Allowance for loan losses:
Beginning Balance	166	118
Charge-offs	(142)	(61)
Recoveries	40	53
Provisions (credits)	144	56
Ending balance	208	166
Ending balance: related to loans individually evaluated for impairment	0	0
Ending balance: related to loans collectively evaluated for impairment	208	166
Total Loans Receivable	28,646	6,293
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	$ 28,646	$ 6,293

Allowance for Loan Losses - Sch

Allowance for Loan Losses - Schedule of Allowance for Loan Losses on Basis of Calculation Methodology (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	$ 1,103	$ 1,130
Historical loss rate	362	283
Qualitative factors	5,661	4,834
Total	7,126	6,247	$ 5,706
Unallocated [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	0	0
Historical loss rate	0	0
Qualitative factors	0	0
Total	0	0	0
Residential Mortgage Loans [Member] | 1-4 Family First Lien Residential Mortgages [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	210	117
Historical loss rate	104	106
Qualitative factors	551	536
Total	865	759	581
Residential Mortgage Loans [Member] | Residential Construction Mortgage [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	0	0
Historical loss rate	0	0
Qualitative factors	0	0
Total	0	0	0
Commercial Loans [Member] | Real Estate [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	320	455
Historical loss rate	103	45
Qualitative factors	3,166	2,435
Total	3,589	2,935	2,983
Commercial Loans [Member] | Lines of Credit [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	40	0
Historical loss rate	40	31
Qualitative factors	655	366
Total	735	397	401
Commercial Loans [Member] | Other Commercial and Industrial [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	391	553
Historical loss rate	15	50
Qualitative factors	808	1,055
Total	1,214	1,658	1,270
Commercial Loans [Member] | Tax Exempt Loans [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	0	0
Historical loss rate	0	0
Qualitative factors	1	1
Total	1	1	3
Consumer Loans [Member] | Home Equity and Junior Liens [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	142	5
Historical loss rate	41	35
Qualitative factors	331	291
Total	514	331	350
Consumer Loans [Member] | Other Consumer [Member]
Allowance For Loan Losses On Basis Of Calculation Methodology Abstract
Specifically reserved	0	0
Historical loss rate	59	16
Qualitative factors	149	150
Total	$ 208	$ 166	$ 118

Servicing - Additional Informat

Servicing - Additional Information (Details)	12 Months Ended
	Dec. 31, 2017USD ($)Loan	Dec. 31, 2016USD ($)Loan
Accounts Notes And Loans Receivable [Line Items]
Unpaid principal balance of mortgage and other loans	$ 14,300,000	$ 17,000,000
Capitalized servicing rights	$ 28,000	$ 40,000
Residential Mortgage Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Number of loans | Loan	231	268

Servicing - Mortgage Servicing

Servicing - Mortgage Servicing Rights Capitalized and Amortized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Servicing Asset [Abstract]
Mortgage servicing rights capitalized	$ 0	$ 0
Mortgage servicing rights amortized	$ 12	$ 12

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Premises and Equipment [Line Items]
Premises and equipment, gross	$ 31,287	$ 29,312
Less: Accumulated depreciation	15,170	14,135
Premises and equipment, net	16,117	15,177
Land [Member]
Premises and Equipment [Line Items]
Premises and equipment, gross	2,205	2,205
Buildings [Member]
Premises and Equipment [Line Items]
Premises and equipment, gross	14,917	13,704
Furniture, Fixtures and Equipment [Member]
Premises and Equipment [Line Items]
Premises and equipment, gross	13,515	12,948
Construction in Progress [Member]
Premises and Equipment [Line Items]
Premises and equipment, gross	$ 650	$ 455

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Depreciation	$ 1,035	$ 1,019

Foreclosed Real Estate - Summar

Foreclosed Real Estate - Summary of Carrying Amount of Foreclosed Residential Real Estate Properties Held (Details) $ in Thousands	Dec. 31, 2017USD ($)Property	Dec. 31, 2016USD ($)Property
Real Estate Properties [Line Items]
Foreclosed real estate	$ 468	$ 597
Foreclosed Residential Real Estate [Member]
Real Estate Properties [Line Items]
Number of properties | Property	5	7
Foreclosed real estate	$ 468	$ 393

Foreclosed Real Estate - Additi

Foreclosed Real Estate - Additional Information (Details)	Dec. 31, 2017USD ($)
Real Estate Owned Disclosure Of Detailed Components [Abstract]
Residential real estate loans in the process of foreclosure	$ 805,000

Goodwill And Intangible Asset86

Goodwill And Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2013	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 4,536,000		$ 4,536,000
Identifiable intangible asset	$ 182,000
Future weighted amortization period of intangible asset	7 years
Branches [Member]
Business Acquisition [Line Items]
Goodwill acquired	$ 3,800,000
Fitzgibbons Agency [Member]
Business Acquisition [Line Items]
Goodwill acquired		$ 696,000

Goodwill And Intangible Asset87

Goodwill And Intangible Assets - Schedule of Gross Carrying Amount and Accumulated Amortization for Identifiable Intangible Asset (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Gross carrying amount and accumulated amortization for identifiable intangible asset [Abstract]
Gross carrying amount	$ 198	$ 214
Accumulated amortization	(16)	(16)
Net amortizing intangibles	$ 182	$ 198

Goodwill And Intangible Asset88

Goodwill And Intangible Assets - Schedule of Estimated Amortization Expense for Each of the Five Succeeding Years (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Estimated amortization expense for each of the five succeeding years [Abstract]
2,018	$ 16
2,019	16
2,020	16
2,021	16
2,022	16
Thereafter	102
Net amortizing intangibles	$ 182	$ 198

Deposits - Summary of Deposits

Deposits - Summary of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Summary of deposits [Abstract]
Savings accounts	$ 80,587	$ 80,139
Time accounts	160,736	132,007
Time accounts of $250,000 or more	52,691	57,349
Money management accounts	14,905	14,718
MMDA accounts	253,088	192,692
Demand deposit interest-bearing	66,093	53,587
Demand deposit noninterest-bearing	89,783	75,282
Mortgage escrow funds	5,720	5,209
Total deposits	$ 723,603	$ 610,983

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities of Time Deposits (Details) $ in Thousands	Dec. 31, 2017USD ($)
Maturities of time deposits [Abstract]
2,018	$ 146,318
2,019	42,244
2,020	14,522
2,021	5,889
2,022	2,613
Thereafter	1,841
Total	$ 213,427

Deposits - Summary of Deposit91

Deposits - Summary of Deposits by Type (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deposits [Line Items]
Savings accounts	$ 80,587	$ 80,139
Time accounts	160,736	132,007
Time accounts of $250,000 or more	52,691	57,349
Money management accounts	14,905	14,718
MMDA accounts	253,088	192,692
Demand deposit interest-bearing	66,093	53,587
Demand deposit noninterest-bearing	89,783	75,282
Mortgage escrow funds	5,720	5,209
Total deposits	723,603	610,983
Non-Brokered [Member]
Deposits [Line Items]
Savings accounts	80,587	80,139
Time accounts	109,666	89,200
Time accounts of $250,000 or more	52,691	57,349
Money management accounts	14,905	14,718
MMDA accounts	159,032	105,755
Demand deposit interest-bearing	66,093	53,587
Demand deposit noninterest-bearing	89,783	75,282
Mortgage escrow funds	5,720	5,209
Total deposits	578,477	481,239
Brokered [Member]
Deposits [Line Items]
Savings accounts	0	0
Time accounts	51,070	42,807
Time accounts of $250,000 or more	0	0
Money management accounts	0	0
MMDA accounts	94,056	86,937
Demand deposit interest-bearing	0	0
Demand deposit noninterest-bearing	0	0
Mortgage escrow funds	0	0
Total deposits	$ 145,126	$ 129,744

Borrowed Funds - Composition of

Borrowed Funds - Composition of Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Short-term [Abstract]
Total short-term borrowings	$ 30,600	$ 41,947
Deferred fees hedging		(53)
Long-term [Abstract]
Total long-term borrowings	43,288	17,000
FHLB Advances [Member]
Short-term [Abstract]
Total short-term borrowings	30,600	42,000
Long-term [Abstract]
Total long-term borrowings	$ 43,288	$ 17,000

Borrowed Funds - Scheduled Prin

Borrowed Funds - Scheduled Principal Balances, Interest Rates and Maturities of Outstanding Long-term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Advances with FHLB [Abstract]
Due within 1 year	$ 2,000
Due within 2 years	31,228
Due within 10 years	10,060
Total advances with FHLB	43,288
Total long-term fixed rate borrowings	$ 43,288	$ 17,000
Federal Home Loan Bank advances interest rate [Abstract]
Due within 1 year interest rate	1.04%
Minimum [Member]
Federal Home Loan Bank advances interest rate [Abstract]
Due within 2 years interest rate	1.16%
Due within 10 years interest rate	1.62%
Maximum [Member]
Federal Home Loan Bank advances interest rate [Abstract]
Due within 2 years interest rate	2.00%
Due within 10 years interest rate	2.55%

Borrowed Funds - Scheduled Repa

Borrowed Funds - Scheduled Repayments of Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	$ 2,000
2,019	31,228
2,020	7,060
2,021	1,000
2,022	2,000
Thereafter	0
Total long-term fixed rate borrowings	$ 43,288	$ 17,000

Borrowed Funds - Additional Inf

Borrowed Funds - Additional Information (Details) $ in Millions	Dec. 31, 2017USD ($)Bank
Federal Reserve Bank of New York [Member] | Domestic Line of Credit [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 19.9
Other Corresponding Banks [Member] | Domestic Line of Credit [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 14.4
Number of corresponding banks with a line of credit available | Bank	3
Maximum borrowing capacity, unsecured basis	$ 9.4
Maximum borrowing capacity, requiring collateral	5
FHLB Advances [Member]
Line of Credit Facility [Line Items]
Carrying value of residential mortgage loans pledged under a blanket collateral agreement	148.1
Carrying value of FHLB stock pledged under a blanket collateral agreement	$ 3.9

Subordinated Loans - Additional

Subordinated Loans - Additional Information (Details) - USD ($)	Oct. 15, 2015	Dec. 31, 2017	Mar. 01, 2016	Feb. 29, 2016
Debt Instrument [Line Items]
Subordinated loan face value		$ 5,000,000
3-Month LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, term of variable rate		3 months
Junior Subordinated Debentures [Member] | Pathfinder Statutory Trust II [Member]
Debt Instrument [Line Items]
Ownership interest		100.00%
Subordinated loan face value		$ 5,000,000
Term of debt		30 years
Maturity date		Dec. 31, 2037
Effective interest rate		3.34%
Call provision on trust securities		5 years
Junior Subordinated Debentures [Member] | 3-Month LIBOR [Member] | Pathfinder Statutory Trust II [Member]
Debt Instrument [Line Items]
Variable rate basis		3-month LIBOR
Debt instrument, term of variable rate		3 months
Interest rate		1.69%
Basis spread on variable rate		1.65%
Subordinated Debt [Member]
Debt Instrument [Line Items]
Subordinated loan face value	$ 10,000,000
Maturity date		Oct. 1, 2025
Effective interest rate		6.44%
Subordinated loan interest rate			6.25%	3.50%
Origination and legal fees	$ 172,000
Subordinated Debt [Member] | 3-Month LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.65%

Subordinated Loans - Compositio

Subordinated Loans - Composition of Subordinated Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total subordinated loans	$ 15,059	$ 15,025
Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]
Total subordinated loans	5,155	5,155
Subordinated Loan [Member]
Debt Instrument [Line Items]
Total subordinated loans	$ 9,904	$ 9,870

Subordinated Loans - Schedule o

Subordinated Loans - Schedule of Principal Balances, Interest Rates and Maturities of the Subordinated Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total subordinated loans	$ 15,059	$ 15,025
Subordinated Debt [Member]
Debt Instrument [Line Items]
Due within 10 years	9,904
Due within 20 years	5,155
Total subordinated loans	$ 15,059
Due within 10 years	6.48%
Subordinated Debt [Member] | 3-Month LIBOR [Member]
Debt Instrument [Line Items]
Due within 20 years	1.65%

Subordinated Loans- Scheduled R

Subordinated Loans- Scheduled Repayments of the Subordinated Loans(Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	$ 2,000
2,019	31,228
2,020	7,060
2,021	1,000
2,022	2,000
Thereafter	0
Total subordinated loans	15,059	$ 15,025
Subordinated Debt [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	0
2,019	0
2,020	0
2,021	0
2,022	0
Thereafter	15,059
Total subordinated loans	$ 15,059

Employee Benefits and Deferr100

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans - Additional Information (Details)		12 Months Ended
		Dec. 31, 2017USD ($)FundPayment	Dec. 31, 2016USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2015USD ($)
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Minimum years of service to participate in the health and life insurance benefits as of January 1, 1995		14 years
Gains or losses greater of the benefit obligation or the fair value of assets amortized over the average remaining service period		10.00%
Change in Plan Assets [Roll Forward]
Fair value of plan assets			$ 13,634,000
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Long-term inflation rate		2.50%
Target Allocations [Abstract]
Number of funds in which plan assets invested | Fund		4
Asset rebalancing threshold		10.00%
Policy range guideline		10.00%
401 (k) Plan [Abstract]
Employer contribution to 401 (k) plan		$ 333,000	300,000
Additional safe harbor contribution		$ 244,000
Deferred Compensation Arrangements [Abstract]
Period for additional annual contributions following change in control		24 months
Number of years the Bank is required to make additional annual contributions		3 years
Period for benefit payment in the event of death, disability or termination following change in control		24 months
Number of annual installments for benefit payments | Payment		10
Directors and Certain Executive Officers [Member]
Deferred Compensation Arrangements [Abstract]
Deferred compensation benefit payments age		65 years
Maximum contractual term		10 years
Requisite service period		5 years
Liability related to deferred compensation		$ 2,600,000	2,400,000
Deferred compensation expense		$ 351,000	339,000
Equity Securities [Member]
Target Allocations [Abstract]
Target plan asset allocations - well-funded		38.00%
Fixed Income Securities [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets			7,101,000
Target Allocations [Abstract]
Target plan asset allocations - well-funded		35.00%
Mutual Funds - Fixed Income Intermediate duration [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets	[1]		2,932,000
Target Allocations [Abstract]
Target plan asset allocations - well-funded		16.00%
Estimated retirement life of assets in the trust		30 years
Mutual Funds-Fixed Income Long Duration [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets	[2]		2,474,000
Target Allocations [Abstract]
Target plan asset allocations - well-funded		35.00%
Alternative Asset fund [Member]
Target Allocations [Abstract]
Target plan asset allocations - well-funded		10.00%
Cash Equivalents [Member]
Target Allocations [Abstract]
Target plan asset allocations - well-funded		1.00%
Equities [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets			$ 4,776,000
Target Allocations [Abstract]
Target plan asset allocations - well-funded		65.00%
Pension Benefits [Member]
Significant Assumptions Used in Determining Benefit Obligations [Abstract]
Weighted average discount rate		4.58%	5.15%
Change in Benefit Obligation [Roll Forward]
Accumulated benefit obligation		$ 10,469,000	$ 9,323,000		$ 9,319,000
Change in Plan Assets [Roll Forward]
Fair value of plan assets		$ 14,956,000	$ 13,634,000		12,808,000
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Expected long term rate of return on plan assets		7.00%	7.50%
Expected long term rate of return on plan assets - 2018		7.00%
Expected net periodic benefit cost in next fiscal year		$ 371,000
Pension Benefits [Member] | Fixed Income Securities [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets		7,418,000
Pension Benefits [Member] | Mutual Funds - Fixed Income Intermediate duration [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets	[1]	2,932,000
Pension Benefits [Member] | Mutual Funds-Fixed Income Long Duration [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets	[2]	2,474,000
Pension Benefits [Member] | Equities [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets		5,706,000
Pension Benefits [Member] | Minimum [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets		$ 15,000,000
Pension Benefits [Member] | Minimum [Member] | Equity Securities [Member]
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Real rate of return on assets assumption		6.00%
Expected long term rate of return on plan assets		5.00%
Pension Benefits [Member] | Minimum [Member] | Fixed Income Securities [Member]
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Real rate of return on assets assumption		3.00%
Pension Benefits [Member] | Maximum [Member] | Equity Securities [Member]
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Real rate of return on assets assumption		8.00%
Expected long term rate of return on plan assets		7.00%
Pension Benefits [Member] | Maximum [Member] | Fixed Income Securities [Member]
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Real rate of return on assets assumption		5.00%
Postretirement Benefits [Member]
Significant Assumptions Used in Determining Benefit Obligations [Abstract]
Weighted average discount rate		4.58%	5.32%
Change in Benefit Obligation [Roll Forward]
Accumulated benefit obligation		$ 481,000	$ 154,000		159,000
Change in Plan Assets [Roll Forward]
Fair value of plan assets		$ 0	$ 0		$ 0
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Expected long term rate of return on plan assets		0.00%	0.00%
Decrease in expected long-term rate of return in basis points		5.00%
Decrease in percentage of expected long-term rate of return		26.10%
Decrease in expected long-term rate of return		$ 55,000
Expected net periodic benefit cost in next fiscal year		$ 371,000
Postretirement Benefits [Member] | Scenario Forecast [Member]
Target Allocations [Abstract]
Estimated future employer contributions in next fiscal year				$ 32,000
Postretirement Health Care Plan [Member]
Assumed Health Care Cost Trend Rates [Abstract]
Health care cost trend rate assumption		5.00%
Ultimate health care cost trend rate		4.50%
Year that rate reaches ultimate trend rate		2,021
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Amounts that will be amortized from accumulated other comprehensive income (loss) in next fiscal year		$ 164,000
Estimated amortization of the unrecognized transition obligation and actuarial loss in next fiscal year		13,000
Supplemental Executive Retirement Plans [Member]
Target Allocations [Abstract]
Cash surrender value of life insurance		11,700,000	$ 11,500,000
Other accrued liabilities		$ 631,000
[1]	This category consists mostly of a fund which seeks to track the Barclays Capital US Corporate A or Better 5-20 Year, Bullets only Index, along with a diversified mutual fund holding fixed income securities rated A or better.
[2]	This category consists of a fund that seeks to approximate the performance of the Barclays Capital US Corporate A or Better, 20+ Year Bullets Only Index over the long term.

Employee Benefits and Deferr101

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans - Changes in the Plans Benefit Obligations, Fair Value of Plan Assets and the Plans' Funded Status (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Change in Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 13,634,000
Fair value of plan assets at end of year		$ 13,634,000
Pension Benefits [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligations at beginning of year	9,323,000	9,319,000
Service cost	0	0
Interest cost	473,000	464,000
Actuarial loss (gain)	916,000	(231,000)
Benefits paid	(243,000)	(229,000)
Benefit obligations at end of year	10,469,000	9,323,000
Change in Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	13,634,000	12,808,000
Actual return on plan assets	1,565,000	1,055,000
Benefits paid	(243,000)	(229,000)
Employer contributions	0	0
Fair value of plan assets at end of year	14,956,000	13,634,000
Funded Status - asset (liability)	4,487,000	4,311,000
Postretirement Benefits [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligations at beginning of year	154,000	159,000
Service cost	0	0
Interest cost	8,000	8,000
Actuarial loss (gain)	332,000	0
Benefits paid	(13,000)	(13,000)
Benefit obligations at end of year	481,000	154,000
Change in Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Benefits paid	(13,000)	(13,000)
Employer contributions	13,000	13,000
Fair value of plan assets at end of year	0	0
Funded Status - asset (liability)	$ (481,000)	$ (154,000)

Employee Benefits and Deferr102

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans - Amounts Recognized in Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]
Accumulated other comprehensive income after tax	$ 2,220	$ 1,513
Pension Benefits [Member]
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]
Net loss/(gain)	2,827	2,685
Tax Effect	1,131	1,074
Accumulated other comprehensive income after tax	1,696	1,611
Postretirement Benefits [Member]
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]
Net loss/(gain)	176	(165)
Tax Effect	70	(66)
Accumulated other comprehensive income after tax	$ 106	$ (99)

Employee Benefits and Deferr103

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans - Significant Assumptions Used in Determining Benefit Obligations and Net Periodic Benefit Plan Cost (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Pension Benefits [Member]
Significant Assumptions Used in Determining Benefit Obligations [Abstract]
Weighted average discount rate	4.58%	5.15%
Rate of increase in future compensation levels	0.00%	0.00%
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Weighted average discount rate	4.58%	5.05%
Expected long term rate of return on plan assets	7.00%	7.50%
Rate of increase in future compensation levels	0.00%	0.00%
Postretirement Benefits [Member]
Significant Assumptions Used in Determining Benefit Obligations [Abstract]
Weighted average discount rate	4.58%	5.32%
Rate of increase in future compensation levels	0.00%	0.00%
Significant Assumptions Used in Determining Net Periodic Benefit Plan Cost [Abstract]
Weighted average discount rate	4.58%	5.23%
Expected long term rate of return on plan assets	0.00%	0.00%
Rate of increase in future compensation levels	0.00%	0.00%

Employee Benefits and Deferr104

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans - Composition of Net Periodic Benefit Plan Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Pension Benefits [Member]
Composition of Net Periodic Benefit Plan Cost [Abstract]
Service cost	$ 0	$ 0
Interest cost	473	464
Expected return on plan assets	(945)	(951)
Amortization of transition obligation	0	0
Amortization of net losses/(gains)	154	226
Amortization of unrecognized past service liability	0	0
Net periodic benefit plan benefit	(318)	(261)
Postretirement Benefits [Member]
Composition of Net Periodic Benefit Plan Cost [Abstract]
Service cost	0	0
Interest cost	8	8
Expected return on plan assets	0	0
Amortization of transition obligation	0	0
Amortization of net losses/(gains)	(3)	(3)
Amortization of unrecognized past service liability	(5)	(5)
Net periodic benefit plan benefit	$ 0	$ 0

Employee Benefits and Deferr105

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans - Pension Plan Assets Fair Value (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			$ 13,634
Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			70
Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			13,564
Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Mutual Funds - Equity - Large-cap Value [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[1]		958
Mutual Funds - Equity - Large-cap Value [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[1]		0
Mutual Funds - Equity - Large-cap Value [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[1]		958
Mutual Funds - Equity - Large-cap Value [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[1]		0
Mutual Funds - Equity - Large-cap Growth [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[2]		860
Mutual Funds - Equity - Large-cap Growth [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[2]		0
Mutual Funds - Equity - Large-cap Growth [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[2]		860
Mutual Funds - Equity - Large-cap Growth [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[2]		0
Mutual Funds - Equity - Large-cap Core [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[3]		609
Mutual Funds - Equity - Large-cap Core [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[3]		0
Mutual Funds - Equity - Large-cap Core [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[3]		609
Mutual Funds - Equity - Large-cap Core [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[3]		0
Mutual Funds - Equity - Mid-cap Value [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[4]		204
Mutual Funds - Equity - Mid-cap Value [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[4]		0
Mutual Funds - Equity - Mid-cap Value [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[4]		204
Mutual Funds - Equity - Mid-cap Value [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[4]		0
Mutual Funds - Equity - Mid-Cap Growth [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[5]		186
Mutual Funds - Equity - Mid-Cap Growth [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[5]		0
Mutual Funds - Equity - Mid-Cap Growth [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[5]		186
Mutual Funds - Equity - Mid-Cap Growth [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[5]		0
Mutual Funds - Equity - Mid-cap Core [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[6]		209
Mutual Funds - Equity - Mid-cap Core [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[6]		0
Mutual Funds - Equity - Mid-cap Core [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[6]		209
Mutual Funds - Equity - Mid-cap Core [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[6]		0
Mutual Funds - Equity - Small-cap Value [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[7]		167
Mutual Funds - Equity - Small-cap Value [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[7]		0
Mutual Funds - Equity - Small-cap Value [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[7]		167
Mutual Funds - Equity - Small-cap Value [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[7]		0
Mutual Funds - Equity - Small-cap Growth [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[8]		140
Mutual Funds - Equity - Small-cap Growth [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[8]		0
Mutual Funds - Equity - Small-cap Growth [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[8]		140
Mutual Funds - Equity - Small-cap Growth [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[8]		0
Mutual Funds - Equity - Small-cap Core [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[9]		312
Mutual Funds - Equity - Small-cap Core [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[9]		0
Mutual Funds - Equity - Small-cap Core [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[9]		312
Mutual Funds - Equity - Small-cap Core [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[9]		0
International Equity [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[10]		1,131
International Equity [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[10]		0
International Equity [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[10]		1,131
International Equity [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[10]		0
Equities [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			4,776
Equities [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Equities [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			4,776
Equities [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Mutual Funds Fixed Income US Core [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[11]		1,695
Mutual Funds Fixed Income US Core [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[11]		0
Mutual Funds Fixed Income US Core [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[11]		1,695
Mutual Funds Fixed Income US Core [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[11]		0
Mutual Funds - Fixed Income Intermediate duration [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[12]		2,932
Mutual Funds - Fixed Income Intermediate duration [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[12]		0
Mutual Funds - Fixed Income Intermediate duration [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[12]		2,932
Mutual Funds - Fixed Income Intermediate duration [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[12]		0
Mutual Funds-Fixed Income Long Duration [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[13]		2,474
Mutual Funds-Fixed Income Long Duration [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[13]		0
Mutual Funds-Fixed Income Long Duration [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[13]		2,474
Mutual Funds-Fixed Income Long Duration [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[13]		0
Fixed Income Securities [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			7,101
Fixed Income Securities [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Fixed Income Securities [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			7,101
Fixed Income Securities [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Long/Short Equity Funds [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[14]		1,165
Long/Short Equity Funds [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[14]		0
Long/Short Equity Funds [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[14]		1,165
Long/Short Equity Funds [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[14]		0
Common Stock [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Common Stock [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Common Stock [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Common Stock [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Cash Equivalents-Money Market [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			592
Cash Equivalents-Money Market [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			70
Cash Equivalents-Money Market [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			522
Cash Equivalents-Money Market [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets			0
Pension Benefits [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		$ 14,956	$ 13,634	$ 12,808
Pension Benefits [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		58
Pension Benefits [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		14,898
Pension Benefits [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		0
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Value [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[1]	1,058
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Value [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[1]	0
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Value [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[1]	1,058
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Value [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[1]	0
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Growth [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[2]	1,102
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Growth [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[2]	0
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Growth [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[2]	1,102
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Growth [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[2]	0
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Core [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[3]	733
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Core [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[3]	0
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Core [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[3]	733
Pension Benefits [Member] | Mutual Funds - Equity - Large-cap Core [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[3]	0
Pension Benefits [Member] | Mutual Funds - Equity - Mid-cap Value [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[4]	236
Pension Benefits [Member] | Mutual Funds - Equity - Mid-cap Value [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[4]	0
Pension Benefits [Member] | Mutual Funds - Equity - Mid-cap Value [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[4]	236
Pension Benefits [Member] | Mutual Funds - Equity - Mid-cap Value [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[4]	0
Pension Benefits [Member] | Mutual Funds - Equity - Mid-Cap Growth [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[5]	223
Pension Benefits [Member] | Mutual Funds - Equity - Mid-Cap Growth [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[5]	0
Pension Benefits [Member] | Mutual Funds - Equity - Mid-Cap Growth [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[5]	223
Pension Benefits [Member] | Mutual Funds - Equity - Mid-Cap Growth [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[5]	0
Pension Benefits [Member] | Mutual Funds - Equity - Mid-cap Core [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[6]	239
Pension Benefits [Member] | Mutual Funds - Equity - Mid-cap Core [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[6]	0
Pension Benefits [Member] | Mutual Funds - Equity - Mid-cap Core [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[6]	239
Pension Benefits [Member] | Mutual Funds - Equity - Mid-cap Core [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[6]	0
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Value [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[7]	178
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Value [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[7]	0
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Value [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[7]	178
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Value [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[7]	0
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Growth [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[8]	169
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Growth [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[8]	0
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Growth [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[8]	169
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Growth [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[8]	0
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Core [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[9]	349
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Core [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[9]	0
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Core [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[9]	349
Pension Benefits [Member] | Mutual Funds - Equity - Small-cap Core [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[9]	0
Pension Benefits [Member] | International Equity [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[10]	1,419
Pension Benefits [Member] | International Equity [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[10]	0
Pension Benefits [Member] | International Equity [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[10]	1,419
Pension Benefits [Member] | International Equity [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[10]	0
Pension Benefits [Member] | Equities [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		5,706
Pension Benefits [Member] | Equities [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		0
Pension Benefits [Member] | Equities [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		5,706
Pension Benefits [Member] | Equities [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		0
Pension Benefits [Member] | Mutual Funds Fixed Income US Core [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[11]	1,695
Pension Benefits [Member] | Mutual Funds Fixed Income US Core [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[11]	0
Pension Benefits [Member] | Mutual Funds Fixed Income US Core [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[11]	1,713
Pension Benefits [Member] | Mutual Funds Fixed Income US Core [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[11]	0
Pension Benefits [Member] | Mutual Funds - Fixed Income Intermediate duration [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[12]	2,932
Pension Benefits [Member] | Mutual Funds - Fixed Income Intermediate duration [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[12]	0
Pension Benefits [Member] | Mutual Funds - Fixed Income Intermediate duration [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[12]	3,075
Pension Benefits [Member] | Mutual Funds - Fixed Income Intermediate duration [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[12]	0
Pension Benefits [Member] | Mutual Funds-Fixed Income Long Duration [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[13]	2,474
Pension Benefits [Member] | Mutual Funds-Fixed Income Long Duration [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[13]	0
Pension Benefits [Member] | Mutual Funds-Fixed Income Long Duration [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[13]	2,630
Pension Benefits [Member] | Mutual Funds-Fixed Income Long Duration [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[13]	0
Pension Benefits [Member] | Fixed Income Securities [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		7,418
Pension Benefits [Member] | Fixed Income Securities [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		0
Pension Benefits [Member] | Fixed Income Securities [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		7,418
Pension Benefits [Member] | Fixed Income Securities [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		0
Pension Benefits [Member] | Long/Short Equity Funds [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[14]	1,533
Pension Benefits [Member] | Long/Short Equity Funds [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[14]	0
Pension Benefits [Member] | Long/Short Equity Funds [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[14]	1,533
Pension Benefits [Member] | Long/Short Equity Funds [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets	[14]	0
Pension Benefits [Member] | Common Stock [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		0
Pension Benefits [Member] | Common Stock [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		0
Pension Benefits [Member] | Common Stock [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		0
Pension Benefits [Member] | Common Stock [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		0
Pension Benefits [Member] | Cash Equivalents-Money Market [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		299
Pension Benefits [Member] | Cash Equivalents-Money Market [Member] | Level 1 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		58
Pension Benefits [Member] | Cash Equivalents-Money Market [Member] | Level 2 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		241
Pension Benefits [Member] | Cash Equivalents-Money Market [Member] | Level 3 [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Fair value of plan assets		$ 0
[1]	This category contains large-cap stocks with above-average yield. The portfolio typically holds between 60 and 70 stocks.
[2]	This category seeks long-term capital appreciation by investing primarily in large growth companies based in the U.S.
[3]	This fund tracks the performance of the S&P 500 index by purchasing the securities represented in the index in approximately the same weightings as the index.
[4]	This category employs an indexing investment approach designed to track the performance of the CRSP US Mid-Cap Value Index.
[5]	This category employs an indexing investment approach designed to track the performance of the CRSP US Mid-Cap Growth Index.
[6]	This category seeks to track the performance of the S&P Midcap 400 Index.
[7]	This category consists of a selection of investments based on the Russell 2000 Value Index.
[8]	This category consists of a selection of investments based on the Russell 2000 Growth Index.
[9]	This category consists of an index fund designed to track the Russell 2000, along with a fund investing in readily marketable securities of U.S. companies with market capitalizations within the smallest 10% of the market universe, or smaller than the 1000th largest US company.
[10]	This category has investments in medium to large non-US companies, including high quality, durable growth companies and companies based in countries with stable economic and political systems. A portion of this category consists of an index fund designed to track the MSC ACWI ex-US Net Dividend Return Index.
[11]	This category currently includes equal investments in three mutual funds, two of which usually hold at least 80% of fund assets in investment grade fixed income securities, seeking to outperform the Barclays US Aggregate Bond Index while maintaining a similar duration to that index. The third fund targets investments of 50% or more in mortgage-backed securities guaranteed by the US government and its agencies.
[12]	This category consists mostly of a fund which seeks to track the Barclays Capital US Corporate A or Better 5-20 Year, Bullets only Index, along with a diversified mutual fund holding fixed income securities rated A or better.
[13]	This category consists of a fund that seeks to approximate the performance of the Barclays Capital US Corporate A or Better, 20+ Year Bullets Only Index over the long term.
[14]	This category currently invests in three long/short equity hedge funds.

Employee Benefits and Deferr106

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans - Pension Plan Assets Fair Value (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2017FundStock	Dec. 31, 2016FundStock
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Number of funds in which plan assets invested	4
Minimum [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Approximate or typical number of stocks held in the portfolio | Stock	60	60
Maximum [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Approximate or typical number of stocks held in the portfolio | Stock	70	70
Mutual Funds - Equity - Small-cap Core [Member] | Maximum [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Market capitalizations	10.00%	10.00%
Mutual Funds - Fixed Income Intermediate duration [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Assets category consist of number of funds	3	3
Mutual Funds - Fixed Income Intermediate duration [Member] | Minimum [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Maturity Period of debt security	5 years	5 years
Mutual Funds - Fixed Income Intermediate duration [Member] | Maximum [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Maturity Period of debt security	20 years	20 years
Mutual Funds-Fixed Income Long Duration [Member] | Minimum [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Maturity Period of debt security	20 years	20 years
Mutual Funds Fixed Income US Core [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Number of investments in fund assets in investment grade fixed income securities	2	2
Mutual Funds Fixed Income US Core [Member] | Maximum [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Percentage of fund assets in investment grade fixed income securities	80.00%	80.00%
Percentage of target investments in mortgage-backed securities	50.00%	50.00%
Long/Short Equity Funds [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Number of funds in which plan assets invested	3	3

Employee Benefits and Deferr107

Employee Benefits and Deferred Compensation and Supplemental Retirement Plans - Expected Future Service Benefit Payments (Details) $ in Thousands	Dec. 31, 2017USD ($)
Expected Benefit Payments [Abstract]
2,018	$ 329
2,019	340
2,020	359
2,021	378
2,022	403
Years 2023-2027	2,766
Pension Benefits [Member]
Expected Benefit Payments [Abstract]
2,018	297
2,019	306
2,020	324
2,021	341
2,022	364
Years 2023-2027	2,626
Postretirement Benefits [Member]
Expected Benefit Payments [Abstract]
2,018	32
2,019	34
2,020	35
2,021	37
2,022	39
Years 2023-2027	$ 140

Stock Based Compensation Pla108

Stock Based Compensation Plans - Additional Information (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)DirectorSeniorOfficerOfficerExecutiveOfficer$ / sharesshares	Dec. 31, 2015Director$ / sharesshares	Dec. 31, 2014	Dec. 31, 2013Director$ / sharesshares	Dec. 31, 2011DirectorSeniorVicePresident$ / sharesshares
Stock Option [Member]
Stock Options Outstanding [Roll Forward]
Granted (in shares)	0	264,000
Options, Additional Disclosures [Abstract]
Intrinsic value of options exercised | $	$ 2,300	$ 1,700
Options oustanding (in shares)	395,177	423,000	185,000
Options exercisable (in shares)	167,835	139,000	128,000
Options exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 7.61
Weighted average remaining contractual term - options outstanding	5 years 3 months 18 days
Stock Option Awards and Restricted Stock Units [Member]
Fair Value Assumptions [Abstract]
Compensation expense | $	$ 345	$ 264
Estimated Future Compensation Expense [Abstract]
Estimated future compensation expense, 2018 | $	320
Estimated future compensation expense, 2019 | $	313
Estimated future compensation expense, 2020 | $	312
Estimated future compensation expense, 2021 | $	173
Estimated future compensation expense, 2022 | $	110
Estimated future compensation expense, 2023 | $	$ 37
April 2010 Stock Option Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Ratio of conversion of shares				0.016472
Number of shares authorized (in shares)						247,080
April 2010 Stock Option Grants [Member] | Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		5 years	5 years		5 years	5 years
Award annual vesting		20.00%	20.00%		20.00%	20.00%
Term of award		10 years	10 years		10 years	10 years
Fair Value Assumptions [Abstract]
Risk free interest rate		1.60%	1.90%		2.00%	2.20%
Expected volatility rate		0.32%	0.23%		0.45%	0.45%
Expected life		7 years	7 years		7 years	7 years
Expected dividend yield		1.55%	1.40%		1.00%	1.49%
Weighted average fair value of options granted (in dollars per share) | $ / shares		$ 3.17	$ 2.56		$ 3.69	$ 2.29
April 2010 Stock Option Grants [Member] | Stock Option [Member] | Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | Director			2		2	9
Stock Options Outstanding [Roll Forward]
Granted (in shares)			16,472		16,472	74,124
April 2010 Stock Option Grants [Member] | Stock Option [Member] | Senior Vice President [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | SeniorVicePresident						4
April 2010 Stock Option Grants [Member] | Stock Option [Member] | Chief Executive Officer And Senior Vice President [Member]
Stock Options Outstanding [Roll Forward]
Granted (in shares)						123,540
April 2010 Stock Option Grants [Member] | Stock Option [Member] | Senior Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | SeniorOfficer		1
April 2010 Stock Option Grants [Member] | Stock Option [Member] | Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | Officer		3
Stock Options Outstanding [Roll Forward]
Granted (in shares)		47,768
May 2016 Stock Option Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized (in shares)		263,605
May 2016 Stock Option Grants [Member] | Stock Option [Member] | Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | Director		9
Stock Options Outstanding [Roll Forward]
Granted (in shares)		79,083
May 2016 Stock Option Grants [Member] | Stock Option [Member] | Senior Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | SeniorOfficer		3
Fair Value Assumptions [Abstract]
Number of beneficiaries whose award vested upon retirement | SeniorOfficer		1
May 2016 Stock Option Grants [Member] | Stock Option [Member] | Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | Officer		13
Stock Options Outstanding [Roll Forward]
Granted (in shares)		44,812
May 2016 Stock Option Grants [Member] | Stock Option [Member] | Directors and Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		5 years
Award annual vesting		20.00%
Term of award		10 years
Fair Value Assumptions [Abstract]
Risk free interest rate		1.60%
Expected volatility rate		0.32%
Expected life		7 years
Expected dividend yield		1.55%
Weighted average fair value of options granted (in dollars per share) | $ / shares		$ 3.32
May 2016 Stock Option Grants [Member] | Stock Option [Member] | Executive Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | ExecutiveOfficer		2
May 2016 Stock Option Grants [Member] | Stock Option [Member] | Chief Executive Officer, Executive Officers and Senior Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		7 years
Award annual vesting		14.28%
Term of award		10 years
Fair Value Assumptions [Abstract]
Risk free interest rate		1.70%
Expected volatility rate		0.32%
Expected life		7 years
Expected dividend yield		1.55%
Weighted average fair value of options granted (in dollars per share) | $ / shares		$ 3.59
May 2016 Stock Option Grants [Member] | Stock Option [Member] | Chief Executive Officer [Member]
Stock Options Outstanding [Roll Forward]
Granted (in shares)		92,261
May 2016 Restricted Stock Unit Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized (in shares)		105,442
May 2016 Restricted Stock Unit Grants [Member] | Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		5 years
Award annual vesting		20.00%
May 2016 Restricted Stock Unit Grants [Member] | Restricted Stock Units [Member] | Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | Director		9
Options, Additional Disclosures [Abstract]
Granted (in shares)		31,635
May 2016 Restricted Stock Unit Grants [Member] | Restricted Stock Units [Member] | Senior Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | SeniorOfficer		3
Fair Value Assumptions [Abstract]
Number of beneficiaries whose award vested upon retirement | SeniorOfficer		1
May 2016 Restricted Stock Unit Grants [Member] | Restricted Stock Units [Member] | Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | Officer		2
Options, Additional Disclosures [Abstract]
Granted (in shares)		8,436
May 2016 Restricted Stock Unit Grants [Member] | Restricted Stock Units [Member] | Executive Officers [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock awards beneficiaries | ExecutiveOfficer		2
May 2016 Restricted Stock Unit Grants [Member] | Restricted Stock Units [Member] | Chief Executive Officer, Executive Officers and Senior Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		7 years
Award annual vesting		14.28%
Options, Additional Disclosures [Abstract]
Granted (in shares)		46,570

Stock Based Compensation Pla109

Stock Based Compensation Plans - Activity in the Stock Option Plans (Details) - Stock Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Stock Options Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)	423,000	185,000
Granted (in shares)	0	264,000
Newly vested (in shares)	0	0
Exercised (in shares)	(28,000)	(26,000)
Expired (in shares)	0	0
Outstanding at end of period (in shares)	395,177	423,000
Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of period (in dollars per share)	$ 6.21	$ 5.75
Granted (in dollars per share)	0	11.25
Newly vested (in dollars per share)	10.92	6.21
Exercised (in dollars per share)	0	0
Expired (in dollars per share)	0	0
Outstanding at end of period (in dollars per share)	$ 10.92	$ 6.21
Options, Additional Disclosures [Abstract]
Options exercisable at beginning of period (in shares)	139,000	128,000
Options exercisable, Granted (in shares)	0	0
Options exercisable, Newly vested (in shares)	57,000	37,000
Options exercisable, Exercised (in shares)	(28,000)	(26,000)
Options exercisable, Expired (in shares)	0	0
Options exercisable at end of period (in shares)	167,835	139,000

Employee Stock Ownership Plan -

Employee Stock Ownership Plan - Additional Information (Details) - Employee Stock Ownership Plan (ESOP) [Member] - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2011	Dec. 31, 2017	Dec. 31, 2016
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Loan	$ 1,100
Shares purchased (in shares)	125,000	105,442
Term of loan repayment		10 years
Basis spread on variable rate		1.00%
Number of shares from refinanced loan (in shares)		138,982.5
Number of shares from new loan (in shares)		244,424.5
Fixed interest rate		3.25%
Award annual vesting		20.00%
Compensation expense		$ 404	$ 333
Dividends on unallocated shares		$ 37	$ 40
Unearned ESOP shares (in shares)		164,987
Fair value of unearned ESOP shares		$ 2,500

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Tax Expense [Abstract]
Current	$ 1,022	$ 1,360
Deferred	(100)	(249)
Income tax expense	922	1,111
Income Tax Expense by Jurisdiction [Abstract]
Federal Income Tax	741	980
State Tax	181	131
Income tax expense	$ 922	$ 1,111

Income Taxes - Components of th

Income Taxes - Components of the Net Deferred Tax Asset Included in Other Assets (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Assets:
Deferred compensation	$ 847,000	$ 912,000
Allowance for loan losses	1,862,000	2,392,000
Postretirement benefits	126,000	56,000
Subordinated loan interest	23,000	37,000
Investment securities and financial derivative	551,000	1,229,000
Impairment losses on investment securities	0	88,000
Loan origination fees	108,000	184,000
Capital loss carryforward	0	62,000
Held-to-maturity securities	153,000	310,000
Other	212,000	166,000
Total	3,882,000	5,436,000
Liabilities:
Prepaid pension	(1,173,000)	(1,605,000)
Depreciation	(968,000)	(1,083,000)
Accretion	(120,000)	(211,000)
Intangible assets	(1,004,000)	(1,470,000)
Mortgage servicing rights	(7,000)	(15,000)
Prepaid expenses and transaction fees	(79,000)	(204,000)
Total	(3,351,000)	(4,588,000)
Net deferred tax assets	531,000	848,000
Less: deferred tax asset valuation allowance	0	(150,000)
Net deferred tax asset	$ 531,000	$ 698,000

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Line Items]
Deferred tax valuation allowance	$ 0		$ 0	$ 150,000
Recognized capital gains net			$ 428,000
Federal corporate income tax rate			34.00%	34.00%
Tax cuts and jobs act of 2017 change in tax rate income tax expense (benefit)	$ (155,000)
Scenario, Plan [Member]
Income Taxes [Line Items]
Federal corporate income tax rate		21.00%

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of the Federa Statutory Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of the Federal Statutory Income Tax Rate to the Effective Income Tax Rate [Abstract]
Federal statutory income tax rate	34.00%	34.00%
State tax, net of federal benefit	2.90%	1.90%
Tax-exempt interest income	(11.20%)	(8.60%)
Increase in value of bank owned life insurance less premiums paid	(2.00%)	(2.00%)
Change in valuation allowance	(3.50%)	(2.60%)
Remeasurement of net deferred tax assets for tax rate reduction - Tax Cuts & Jobs Act	(3.50%)	(0.00%)
Other	4.50%	2.50%
Effective income tax rate	20.60%	25.50%
Minority interest	(0.60%)	0.30%
Pathfinder Bank [Member]
Reconciliation of the Federal Statutory Income Tax Rate to the Effective Income Tax Rate [Abstract]
Effective income tax rate	21.20%	25.20%

Commitments and Contingencies -

Commitments and Contingencies - Summary of the Contractual Amounts of Financial Instruments with Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Commitments to Grant Loans [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual obligation	$ 58,235	$ 46,649
Unfunded Commitments Under Lines Of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual obligation	62,879	48,653
Unfunded Commitments Related to Construction Loans in Progress [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual obligation	3,506	5,918
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual obligation	$ 2,153	$ 1,900

Commitments and Contingencie116

Commitments and Contingencies - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Loan commitments outstanding with fixed interest rates	$ 11,100,000
Loan commitments, unused lines of credit and standby letters of credit with variable interest rates	$ 112,200,000
Term of letters of credit, maximum	1 year
Renewal options for leases, maximum	30 years
Rent expense	$ 166,000	$ 149,000

Commitments and Contingencie117

Commitments and Contingencies - Schedule of Minimum Rental Commitments for Non-cancelable Operating Leases (Details) $ in Thousands	Dec. 31, 2017USD ($)
Future Minimum Rental Commitments for Non-cancelable Operating Leases [Abstract]
2,018	$ 203
2,019	184
2,020	170
2,021	145
2,022	136
Thereafter	301
Total minimum lease payments	$ 1,139

Dividends and Restrictions - Ad

Dividends and Restrictions - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Restrictions On Dividends Loans And Advances Disclosure [Abstract]
Retained earnings legally available to pay dividends	$ 11.6
Proceeds from dividends received	$ 0	$ 0	$ 0

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Details) - USD ($)	Feb. 16, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Oct. 01, 2011	Jan. 01, 2019	Jan. 01, 2016	Oct. 15, 2015	Sep. 01, 2011
Class of Stock [Line Items]
Common equity tier 1 capital to risk-weighted assets			2.50%
Capital conservation buffer percentage of risk weighted assets								0.625%
Preferred stock dividend rate	9.00%
Redeemed shares (in shares)				(13,000)
Subordinated loan face value			$ 5,000,000
Cash dividends paid to preferred shareholder - SBLF		$ 16,000	$ 0	$ 49,000
Tier 1 Capital (to Assets)			5.00%	5.00%
Tier 1 Capital (to Risk-Weighted Assets)			6.00%	6.00%
Total Core Capital (to Risk-Weighted Assets)			10.00%	10.00%
Average balance of cash on hand or with the Federal Reserve Bank			$ 6,300,000	$ 13,200,000
Minimum [Member]
Class of Stock [Line Items]
Tier 1 Capital (to Assets)			5.00%
Tier 1 Capital (to Risk-Weighted Assets)			6.00%
Total Core Capital (to Risk-Weighted Assets)			10.00%
Subordinated Debt [Member]
Class of Stock [Line Items]
Subordinated loan face value									$ 10,000,000
Annual increased interest expense	$ 644,000
Preferred Stock CPP [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)										13,000
Preferred stock liquidation preference (in dollars per share)										$ 1,000
Preferred stock										$ 13,000,000
Preferred Stock SBLF [Member]
Class of Stock [Line Items]
Preferred stock dividend rate					1.00%	4.20%
Preferred dividends payable amount	$ 1,200,000
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Redeemed shares (in shares)	(13,000)
Payment for redeemed shares	$ (13,000,000)
Scenario Forecast [Member]
Class of Stock [Line Items]
Capital conservation buffer percentage of risk weighted assets							2.50%

Regulatory Matters - Actual Cap

Regulatory Matters - Actual Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Actual Amount [Abstract]
Total Core Capital (to Risk-Weighted Assets)	$ 78,105	$ 72,098
Tier 1 Capital (to Risk-Weighted Assets)	71,114	66,003
Tier 1 Common Equity (to Risk-Weighted Assets)	71,114	66,003
Tier 1 Capital (to Assets)	$ 71,114	$ 66,003
Actual Ratio [Abstract]
Total Core Capital (to Risk-Weighted Assets)	13.97%	14.79%
Tier 1 Capital (to Risk-Weighted Assets)	12.72%	13.54%
Tier 1 Common Equity (to Risk-Weighted Assets)	12.72%	13.54%
Tier 1 Capital (to Assets)	8.16%	9.06%
Minimum Capital Adequacy Purposes Amount [Abstract]
Total Core Capital (to Risk-Weighted Assets)	$ 44,733	$ 38,996
Tier 1 Capital (to Risk-Weighted Assets)	33,550	29,247
Tier 1 Common Equity (to Risk-Weighted Assets)	25,162	21,935
Tier 1 Capital (to Assets)	$ 34,863	$ 29,154
Minimum Capital Adequacy Purposes Ratio [Abstract]
Total Core Capital (to Risk-Weighted Assets)	8.00%	8.00%
Tier 1 Capital (to Risk-Weighted Assets)	6.00%	6.00%
Tier 1 Common Equity (to Risk-Weighted Assets)	4.50%	4.50%
Tier 1 Capital (to Assets)	4.00%	4.00%
Minimum To Be "Well Capitalized" Under Prompt Corrective Provisions Amount [Abstract]
Total Core Capital (to Risk-Weighted Assets)	$ 55,916	$ 48,745
Tier 1 Capital (to Risk-Weighted Assets)	44,733	38,996
Tier 1 Common Equity (to Risk-Weighted Assets)	36,345	31,684
Tier 1 Capital (to Assets)	$ 43,579	$ 36,443
Minimum To Be "Well Capitalized" Under Prompt Corrective Provisions Ratio [Abstract]
Total Core Capital (to Risk-Weighted Assets)	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets)	8.00%	8.00%
Tier 1 Common Equity (to Risk-Weighted Assets)	6.50%	6.50%
Tier 1 Capital (to Assets)	5.00%	5.00%
"Well-Capitalized With Buffer, Fully Phased In 2019 Amount [Abstract]
Total Core Capital (to Risk-Weighted Assets)	$ 58,712	$ 51,182
Tier 1 Capital (to Risk-Weighted Assets)	47,529	41,433
Tier 1 Common Equity (to Risk-Weighted Assets)	39,141	34,121
Tier 1 Capital (to Assets)	$ 43,579	$ 36,443
"Well-Capitalized With Buffer, Fully Phased In 2019 Ratio [Abstract]
Total Core Capital (to Risk-Weighted Assets)	10.50%	10.50%
Tier 1 Capital (to Risk-Weighted Assets)	8.50%	8.50%
Tier 1 Common Equity (to Risk-Weighted Assets)	7.00%	7.00%
Tier 1 Capital (to Assets)	5.00%	5.00%

Interest Rate Derivative - Addi

Interest Rate Derivative - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Floating rate trust preferred debenture face amount	$ 5,000,000
Derivative Financial Instruments [Abstract]
Proceeds from sale of U.S. Treasury securities	$ 40,000,000	$ 25,000,000
Repurchase agreement period	30 days	30 days
Recognized gain on the sale and repurchase of securities	$ 428,000	$ 85,000
Interest on repurchase collateral loan		0.00%
Tax benefit from repurchase of treasury security		$ 34,000
Deferred fees for consulting services		$ 53,000,000
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	$ 2,000,000
Remaining term	7 years
Fixed interest rate	4.96%
LIBOR [Member]
Derivative [Line Items]
Term of variable rate	3 months

Fair Value Measurements and 122

Fair Value Measurements and Disclosures - Fair Value of Assets on Recurring Basis Segregated by Level of Valuation Inputs (Details) - Recurring Basis [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Total Fair Value [Member]
Debt investment securities:
US Treasury, agencies and GSEs	$ 41,336	$ 24,184
State and political subdivisions	13,681	16,481
Corporate	8,600	15,195
Asset backed securities	6,644	6,664
Residential mortgage-backed - US agency	35,742	30,566
Collateralized mortgage obligations - US agency	53,348	40,986
Collateralized mortgage obligations - Private label	11,052	6,577
Mutual funds:
Ultra short mortgage fund		626
Common stock - Financial services industry	735	676
Total available-for-sale securities	171,138	141,955
Level 1 [Member]
Debt investment securities:
US Treasury, agencies and GSEs	0	0
State and political subdivisions	0	0
Corporate	0	0
Asset backed securities	0	0
Residential mortgage-backed - US agency	0	0
Collateralized mortgage obligations - US agency	0	0
Collateralized mortgage obligations - Private label	0	0
Mutual funds:
Ultra short mortgage fund		626
Common stock - Financial services industry	0	0
Total available-for-sale securities	0	626
Level 2 [Member]
Debt investment securities:
US Treasury, agencies and GSEs	41,336	24,184
State and political subdivisions	13,681	16,481
Corporate	8,600	15,195
Asset backed securities	6,644	6,664
Residential mortgage-backed - US agency	35,742	30,566
Collateralized mortgage obligations - US agency	53,348	40,986
Collateralized mortgage obligations - Private label	11,052	6,577
Mutual funds:
Ultra short mortgage fund		0
Common stock - Financial services industry	220	220
Total available-for-sale securities	170,623	140,873
Level 3 [Member]
Debt investment securities:
US Treasury, agencies and GSEs	0	0
State and political subdivisions	0	0
Corporate	0	0
Asset backed securities	0	0
Residential mortgage-backed - US agency	0	0
Collateralized mortgage obligations - US agency	0	0
Collateralized mortgage obligations - Private label	0	0
Mutual funds:
Ultra short mortgage fund		0
Common stock - Financial services industry	515	456
Total available-for-sale securities	$ 515	$ 456

Fair Value Measurements and 123

Fair Value Measurements and Disclosures - Changes in Level 3 Assets and Liabilities Measured at Estimated Fair Value on a Recurring Basis (Details) - Common Stock - Financial Services Industry [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Roll Forward]
Balance - December 31, 2016	$ 456
Total gains realized/unrealized included in earnings	0
Total gains realized/unrealized included in other comprehensive income	59
Settlements	0
Sales	0
Balance - December 31, 2017	515
Changes in unrealized gains included in earnings related to assets still held at December 31, 2017	$ 0

Fair Value Measurements and 124

Fair Value Measurements and Disclosures - Summary of Valuation Techniques and Significant Unobservable Inputs Used for Investments are Categorized Within Level 3 Fair Value Hierarchy (Details) - Level 3 [Member] - Comparable Companies [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value Inputs Assets Quantitative Information [Line Items]
Common stock - Financial services industry	$ 515	$ 456
Weight ascribed to comparable companies	100.00%	100.00%

Fair Value Measurements and 125

Fair Value Measurements and Disclosures - Summary of Fair Value Assets Measured on Nonrecurring Basis (Details) - Nonrecurring Basis [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Total Fair Value [Member]
Nonrecurring basis [Abstract]
Impaired loans	$ 4,887	$ 4,049
Foreclosed real estate	434	393
Level 1 [Member]
Nonrecurring basis [Abstract]
Impaired loans	0	0
Foreclosed real estate	0	0
Level 2 [Member]
Nonrecurring basis [Abstract]
Impaired loans	0	0
Foreclosed real estate	0	0
Level 3 [Member]
Nonrecurring basis [Abstract]
Impaired loans	4,887	4,049
Foreclosed real estate	$ 434	$ 393

Fair Value Measurements and 126

Fair Value Measurements and Disclosures - Fair Value Inputs, Quantitative Information (Details) - Level 3 [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Minimum [Member] | Impaired Loans [Member] | Appraisal of Collateral - Appraisal Adjustments [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	5.00%	5.00%
Minimum [Member] | Impaired Loans [Member] | Appraisal of Collateral - Cost to Sell [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	7.00%	8.00%
Minimum [Member] | Foreclosed Real Estate [Member] | Appraisal of Collateral - Appraisal Adjustments [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	15.00%	15.00%
Minimum [Member] | Foreclosed Real Estate [Member] | Appraisal of Collateral - Cost to Sell [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	6.00%	6.00%
Maximum [Member] | Impaired Loans [Member] | Appraisal of Collateral - Appraisal Adjustments [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	30.00%	10.00%
Maximum [Member] | Impaired Loans [Member] | Appraisal of Collateral - Cost to Sell [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	13.00%	13.00%
Maximum [Member] | Foreclosed Real Estate [Member] | Appraisal of Collateral - Appraisal Adjustments [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	15.00%	15.00%
Maximum [Member] | Foreclosed Real Estate [Member] | Appraisal of Collateral - Cost to Sell [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	8.00%	8.00%
Weighted Average [Member] | Impaired Loans [Member] | Appraisal of Collateral - Appraisal Adjustments [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	9.00%	5.00%
Weighted Average [Member] | Impaired Loans [Member] | Appraisal of Collateral - Cost to Sell [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	11.00%	10.00%
Weighted Average [Member] | Foreclosed Real Estate [Member] | Appraisal of Collateral - Appraisal Adjustments [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	15.00%	15.00%
Weighted Average [Member] | Foreclosed Real Estate [Member] | Appraisal of Collateral - Cost to Sell [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value inputs, discount rate	7.00%	7.00%

Fair Value Measurements and 127

Fair Value Measurements and Disclosures - Carrying Amounts and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financial assets:
Investment securities - available-for-sale	$ 171,138	$ 141,955
Investment securities - held-to-maturity	66,426	54,429
Carrying Amounts [Member] | Level 1 [Member]
Financial assets:
Cash and cash equivalents	21,991	22,419
Investment securities - available-for-sale	0	626
Accrued interest receivable	3,047	2,532
Financial liabilities:
Demand Deposits, Savings, NOW and MMDA	510,176	421,627
Accrued interest payable	186	75
Carrying Amounts [Member] | Level 2 [Member]
Financial assets:
Investment securities - available-for-sale	170,623	140,873
Investment securities - held-to-maturity	66,196	54,645
Federal Home Loan Bank stock	3,855	3,250
Financial liabilities:
Time Deposits	213,427	189,356
Borrowings	73,888	58,947
Subordinated loans	15,059	15,025
Carrying Amounts [Member] | Level 3 [Member]
Financial assets:
Investment securities - available-for-sale	515	456
Net loans	573,705	485,900
Total Fair Value [Member] | Level 1 [Member]
Financial assets:
Cash and cash equivalents	21,991	22,419
Investment securities - available-for-sale	0	626
Accrued interest receivable	3,047	2,532
Financial liabilities:
Demand Deposits, Savings, NOW and MMDA	510,176	421,627
Accrued interest payable	186	75
Total Fair Value [Member] | Level 2 [Member]
Financial assets:
Investment securities - available-for-sale	170,623	140,873
Investment securities - held-to-maturity	66,426	54,429
Federal Home Loan Bank stock	3,855	3,250
Financial liabilities:
Time Deposits	212,453	189,197
Borrowings	73,575	58,918
Subordinated loans	14,953	14,310
Total Fair Value [Member] | Level 3 [Member]
Financial assets:
Investment securities - available-for-sale	515	456
Net loans	$ 570,439	$ 484,704

Parent Company - Financial I128

Parent Company - Financial Information - Schedule of Condensed Financial Information (Statements of Condition) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS:
Cash and due from banks	$ 9,708	$ 6,968
Available-for-sale securities, at fair value	171,138	141,955
Other assets	8,280	6,367
Total assets	881,257	749,034
LIABILITIES AND SHAREHOLDERS' EQUITY:
Shareholders' equity	61,811	57,929
Total liabilities and shareholders' equity	881,257	749,034
Pathfinder Bank [Member]
ASSETS:
Cash and due from banks	5,004	5,424
Available-for-sale securities, at fair value	515	455
Investment in bank subsidiary	71,883	67,281
Investment in non-bank subsidiary	155	155
Other assets	117	475
Total assets	77,674	73,790
LIABILITIES AND SHAREHOLDERS' EQUITY:
Accrued liabilities	471	404
Subordinated loans	15,059	15,025
Shareholders' equity	62,144	58,361
Total liabilities and shareholders' equity	$ 77,674	$ 73,790

Parent Company - Financial I129

Parent Company - Financial Information - Schedule of Condensed Financial Information (Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income
Total interest and dividend income	$ 29,413	$ 24,093
Interest expense:
Interest	6,290	3,804
Other expenses	2,709	2,482
Tax benefit	(922)	(1,111)
Net income attributable to Pathfinder Bancorp Inc.	3,491	3,272
Pathfinder Bank [Member]
Income
Dividends from non-bank subsidiary	4	4
Realized gains on available-for sale investment securities	428	108
Operating, net	15	0
Total interest and dividend income	447	112
Interest expense:
Interest	1,371	880
Other expenses	169	230
Total expenses	1,540	1,110
Loss before taxes and equity in undistributed net income of subsidiaries	(1,093)	(998)
Tax benefit	262	254
Loss before equity in undistributed net income of subsidiaries	(831)	(744)
Equity in undistributed net income of subsidiaries	4,322	4,016
Net income attributable to Pathfinder Bancorp Inc.	$ 3,491	$ 3,272

Parent Company - Financial I130

Parent Company - Financial Information - Schedule of Condensed Financial Information (Statements of Cash Flows) (Details) - USD ($) $ in Thousands	Oct. 16, 2014	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net income attributable to Pathfinder Bancorp, Inc.			$ 3,491	$ 3,272
Available-for-sale investment securities			(29)	(456)
Stock based compensation and ESOP expense			712	557
Amortization of deferred financing from subordinated debt			34	34
Net change in other assets and liabilities			(1,246)	574
Net cash flows from operating activities			6,842	6,371
INVESTING ACTIVITIES
Realized gains on hedging activity			(428)	(85)
Net cash flows from investing activities			(133,943)	(121,457)
FINANCING ACTIVITIES
Redemption of preferred stock - SBLF			0	(13,000)
Proceeds from exercise of stock options			155	143
Cash dividends paid to preferred shareholder - SBLF		$ (16)	0	(49)
Cash dividends paid to common shareholders			(884)	(866)
Net cash flows from financing activities			126,673	122,260
Change in cash and cash equivalents			(428)	7,174
Cash and cash equivalents at beginning of period		15,245	22,419	15,245
Cash and cash equivalents at end of period			21,991	22,419
Pathfinder Bank [Member]
Operating Activities
Net income attributable to Pathfinder Bancorp, Inc.			3,491	3,272
Equity in undistributed net income of subsidiaries			(4,322)	(4,016)
Available-for-sale investment securities			0	(23)
Stock based compensation and ESOP expense			712	557
Amortization of deferred financing from subordinated debt			34	34
Net change in other assets and liabilities			822	(152)
Net cash flows from operating activities			737	(328)
INVESTING ACTIVITIES
Purchase investments			0	(130)
Realized gains on hedging activity			(428)	(85)
Proceeds from sale of investment			0	43
Net cash flows from investing activities			(428)	(172)
FINANCING ACTIVITIES
Redemption of preferred stock - SBLF			0	(13,000)
Proceeds from exercise of stock options			155	143
Amount received of net proceeds	$ 24,900		0	(1,755)
Cash dividends paid to preferred shareholder - SBLF			0	(16)
Cash dividends paid to common shareholders			(884)	(866)
Net cash flows from financing activities			(729)	(15,494)
Change in cash and cash equivalents			(420)	(15,994)
Cash and cash equivalents at beginning of period		$ 21,418	5,424	21,418
Cash and cash equivalents at end of period			$ 5,004	$ 5,424

Related Party Transactions - Sc

Related Party Transactions - Schedule of Loans to Related Parties (Details) - Directors, Executive Officers and Affiliates [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Loans to Related Parties [Roll Forward]
Balance at the beginning of the year	$ 10,884
Originations and Officer additions	2,287
Principal payments	(3,899)
Balance at the end of the year	$ 9,272

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Directors, Executive Officers and Affiliates [Member]
Related Party Transaction [Line Items]
Deposits of related parties	$ 3.2	$ 3.4

Conversion and Reorganization -

Conversion and Reorganization - Additional Information (Details)	Oct. 16, 2014USD ($)$ / sharesshares	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares	Dec. 31, 2014shares
Conversion Of Stock [Line Items]
Common stock, shares outstanding (in shares) | shares		4,280,227	4,236,744	4,353,850
Pathfinder Bank [Member]
Conversion Of Stock [Line Items]
Ownership interest	60.40%
Number of shares of common stock sold (in shares) | shares	2,636,053
Common stock sold per share (in dollar per share) | $ / shares	$ 10
Gross offering proceeds of common stock	$ 26,400,000
Cash received from acquisition	$ 197,000
Ratio of conversion of shares	1.6472
Cost related to offering	$ 1,500,000
Amount received of net proceeds	$ 24,900,000	$ 0	$ (1,755,000)

Accumulated Other Comprehens134

Accumulated Other Comprehensive Income (Loss) - Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance		$ 58,361	$ 71,229
Other comprehensive income before reclassifications		608	(1,047)
Amounts reclassified from AOCI		(204)	(210)
Reclassification of effect of tax rate change	[1]	(790)
Balance		62,144	58,361
Retirement Plans [Member]
Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance		(1,513)	(1,844)
Other comprehensive income before reclassifications		(379)	198
Amounts reclassified from AOCI		89	133
Reclassification of effect of tax rate change	[1]	(417)
Balance		(2,220)	(1,513)
Unrealized Gains and Losses on Financial Derivative [Member]
Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance		0	(16)
Other comprehensive income before reclassifications		0	1
Amounts reclassified from AOCI		0	15
Reclassification of effect of tax rate change	[1]	0
Balance		0	0
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance		(1,845)	(51)
Other comprehensive income before reclassifications		872	(1,436)
Amounts reclassified from AOCI		(293)	(358)
Reclassification of effect of tax rate change	[1]	(292)
Balance		(1,558)	(1,845)
Unrealized Loss on Securities Transferred to Held-to-Maturity [Member]
Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance		(464)	(654)
Other comprehensive income before reclassifications		115	190
Amounts reclassified from AOCI		0	0
Reclassification of effect of tax rate change	[1]	(81)
Balance		(430)	(464)
AOCI Attributable to Parent [Member]
Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance		(3,822)	(2,565)
Reclassification of effect of tax rate change	[1]	0
Balance		$ (4,208)	$ (3,822)
[1]	Reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the newly enacted Federal corporate income tax rate reduction from 34% to 21%.

Accumulated Other Comprehens135

Accumulated Other Comprehensive Income (Loss) - Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Federal corporate income tax rate		34.00%	34.00%
Scenario Forecast [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Federal corporate income tax rate	21.00%

Accumulated Other Comprehens136

Accumulated Other Comprehensive Income (Loss) - Summary of Amounts Reclassified Out of Each Component of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest on long term borrowings	$ (595)	$ (270)
Salaries and employee benefits	(11,917)	(10,772)
Tax benefit	(922)	(1,111)
Net income attributable to Pathfinder Bancorp Inc.	3,491	3,272
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Holding Gain on Financial Derivative [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest on long term borrowings	0	(25)
Tax benefit	0	10
Net income attributable to Pathfinder Bancorp Inc.	0	(15)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Available-for-Sale Securities [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net gains on sales and redemptions of investment securities	489	594
Tax benefit	(196)	(236)
Net income attributable to Pathfinder Bancorp Inc.	293	358
Reclassification out of Accumulated Other Comprehensive Income [Member] | Retirement Plans [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits	(150)	(222)
Tax benefit	61	89
Net income attributable to Pathfinder Bancorp Inc.	$ (89)	$ (133)