Summary of Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2016
Accounting Policies [Abstract]
Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Policy [Policy Text Block]	Transfer of Financial Assets Transfers of an entire financial asset, a group of entire financial assets, or participating interest in an entire financial asset 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 Bank, (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 Bank does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Basis of Presentation and Use of Estimates	Nature of Operations and Principles of Consolidation First Financial Northwest, Inc. (“First Financial Northwest”), a Washington corporation, was formed on June 1, 2007 for the purpose of becoming the holding company for First Financial Northwest Bank (“the Bank”) in connection with the conversion from a mutual holding company structure to a stock holding company structure completed on October 9, 2007. First Financial Northwest’s business activities generally are limited to passive investment activities and oversight of its investment in First Financial Northwest Bank. Accordingly, the information presented in the consolidated financial statements and related data, relates primarily to First Financial Northwest Bank. First Financial Northwest converted from a savings and loan holding company to a bank holding company in 2015 and is subject to regulation by the Board of Governors of the Federal Reserve Bank of San Francisco (“FRB”) as the successor to the Office of Thrift Supervision (“OTS”). First Financial Northwest Bank is regulated by the Federal Deposit Insurance Corporation (“FDIC”) and the Washington State Department of Financial Institutions (“DFI”). First Financial Northwest Bank was organized in 1923 as a Washington state-chartered savings and loan association, converted to a federal mutual savings and loan association in 1935, and converted to a Washington state-chartered mutual savings bank in 1992. In 2002, First Financial Northwest Bank reorganized into a two-tier mutual holding company structure, became a stock savings bank and became the wholly-owned subsidiary of First Financial of Renton, Inc. In connection with the mutual to stock conversion in 2007, the Bank changed its name to First Savings Bank Northwest. In August 2015, the Bank changed its name to First Financial Northwest Bank to support the expansion of focus to being more than a traditional “savings” bank and in February 4, 2016 changed its charter from a Washington chartered stock savings bank to a Washington chartered commercial bank. First Financial Northwest Bank is a community-based commercial bank primarily serving King and Snohomish Counties, and to a lesser extent, Pierce and Kitsap Counties, Washington. In King County, the headquarters and full-service banking office as well as a branch office are located in Renton. In Snohomish County, two additional branch offices serve Mill Creek and Edmonds. First Financial Northwest Bank’s business consists of attracting deposits from the public and utilizing these deposits to originate one-to-four family residential, multifamily, commercial real estate, construction/land, business and consumer loans. First Financial Diversified Corporation (“FFD”), a wholly-owned subsidiary of First Financial Northwest, continues to hold a portfolio of one-to-four family, land and consumer loans that are serviced by the Bank. At December 31, 2016, FFD had net loans receivable of $2.4 million that were all performing. The accompanying consolidated financial statements include the accounts of First Financial Northwest and its wholly‑owned subsidiaries First Financial Northwest Bank and First Financial Diversified Corporation (collectively, “the Company”). All significant intercompany balances and transactions between First Financial Northwest and its subsidiaries have been eliminated in consolidation. Basis of Presentation and Use of Estimates The accounting and reporting policies of First Financial Northwest and its subsidiaries conform to U.S. generally accepted accounting principles (“GAAP”). In preparing the consolidated financial statements, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided. Actual results could differ from these estimates. Material estimates particularly subject to change include the allowance for loan and lease losses (“ALLL”), other real estate owned (“OREO”), deferred tax assets and the fair values of financial instruments.
Subsequent Events	Subsequent Events The Company has evaluated events and transactions subsequent to December 31, 2016 for potential recognition or disclosure. See Note 18 - Subsequent Events for more information.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of reporting cash flows, cash and cash equivalents include cash on hand and in banks, interest-bearing deposits and federal funds sold all with maturities of three months or less. The Bank is required to maintain an average reserve balance with the FRB or maintain such reserve balance in the form of cash. The required reserve balance was $228,000 at December 31, 2016, and $434,000 at December 31, 2015.
Investments	Investments Investments are classified into one of three categories: (1) held-to-maturity, (2) available-for-sale, or (3) trading. We had no held-to-maturity or trading securities at December 31, 2016, or 2015. Investments are categorized as held-to-maturity when we have the positive intent and ability to hold them to maturity. Investments are classified as available-for-sale if the Company intends to hold the securities for an indefinite period of time, but not necessarily to maturity. Investments available-for-sale are reported at fair value. Unrealized holding gains and losses on investments available-for-sale are excluded from earnings and are reported in other comprehensive income (loss), net of applicable taxes. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. Amortization or accretion of purchase premiums and discounts are included in investment income using the level-yield method over the remaining period to contractual maturity. Dividend or interest income is recognized when it is earned. The estimated fair value of investments is based on quoted market prices for investments traded in active markets or dealer quotes. Mortgage-backed investments represent participation interest in pools of first mortgage loans originated and serviced by the issuers of the investments. Management makes an assessment to determine whether there have been any events or economic circumstances to indicate that a security on which there is an unrealized loss is impaired on an other-than-temporary basis. Management considers many factors including the severity and duration of the impairment, recent events specific to the issuer or industry, and for debt securities, external credit ratings and recent downgrades. Securities on which there is an unrealized loss that is deemed to be an other-than-temporary impairment (“OTTI”) are written down to fair value. For equity securities, the write-down is recorded as a realized loss in noninterest income in the Consolidated Income Statements. For debt securities, if management intends to sell the security or it is likely that management will be required to sell the security before recovering its cost basis, the entire impairment loss would be recognized in earnings as an OTTI. If management does not intend to sell the security and it is not likely that management will be required to sell the security but management does not expect to recover the entire amortized cost basis of the security, only the portion of the impairment loss representing credit losses would be recognized in earnings. The credit loss on a security is measured as the difference between the amortized cost basis and the present value of the cash flows expected to be collected. Projected cash flows are discounted by the original or current effective interest rate depending on the nature of the security being measured for potential OTTI. The remaining impairment related to all other factors, the difference between the present value of the cash flows expected to be collected and fair value, is recognized as a charge to other comprehensive income (“OCI”). Impairment losses related to all other factors are presented as separate categories within OCI.
Loans Receivable	Loans Receivable Loans are recorded at their outstanding principal balance adjusted for charge-offs, the ALLL and net deferred fees or costs. Interest on loans is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income using the level-yield method without anticipating prepayments. The accrual of interest on loans is discontinued at the time the loan is 90 days delinquent unless the loan is well secured and in the process of collection. Consumer and other loans are typically managed in the same manner. In all cases, loans are placed on nonaccrual or charged-off at an earlier date if collection of principal or interest is doubtful. All interest accrued but not collected on loans that are placed on nonaccrual is reversed against interest income. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured. In order to return a nonaccrual loan to accrual status, each loan is evaluated on a case-by-case basis. We evaluate the borrower’s financial condition to ensure that future loan payments are reasonably assured. We also take into consideration the borrower’s willingness and ability to make the loan payments and historical repayment performance. We require the borrower to make the loan payments consistently for a period of at least six months as agreed to under the terms of any modified loan agreement before we will consider reclassifying the loan to accrual status.
Allowance for Loan and Lease Losses (ALLL)	Allowance for Loan and Lease Losses The allowance for loan and lease losses (“ALLL”) is a valuation allowance for probable incurred credit losses. Losses are charged against the allowance when management believes the uncollectability of a loan balance is confirmed. Any subsequent recoveries are credited to the allowance. The ALLL is evaluated on a regular basis by management and is based upon management’s periodic review of the collectability of the loans and factors such as the nature and volume of the loan portfolio, historical loss considerations, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. The evaluation is inherently subjective, as it requires estimates that are susceptible to significant revision as more information becomes available. While management uses available information to recognize losses on loans, future additions to the allowance may be necessary based on changes in economic conditions or changes to the credit quality of the loan portfolio. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Company’s ALLL. Such agencies may require management to make adjustments to the allowance based on their judgments about information available to them at the time of their examination.
Impaired Loans	Impaired Loans 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, market conditions, rent rolls and the financial strength of the borrower(s) and guarantor(s), if any. 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 borrowers, including the length of the delay, the reasons for the delay, the borrower’s prior payment history and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured by the fair value method on a loan-by-loan basis. When a loan is identified as impaired, its impairment is measured using the present value of expected future cash flows, discounted at the loan’s effective interest rate, except when the sole (remaining) source of repayment for the loan is the operation or liquidation of the collateral. In these cases, the Company uses an observable market price or current fair value of the collateral, less certain completion costs and closing costs when foreclosure is probable, instead of discounted cash flows. The Company obtains annual updated appraisals for impaired collateral dependent loans that exceed $1.0 million and loans that have been transferred to OREO. In addition, the Company may order appraisals on properties not included within these guidelines when there are extenuating circumstances where the Company is not otherwise able to determine the fair value of the property. Appraised values may be discounted based on management’s historical knowledge, changes in market conditions from the time of valuation and/or management’s expertise and knowledge of the borrower. If management determines that the value of the impaired loan is less than the recorded investment in the loan, an impairment is recognized through an allowance estimate or a charge-off to the ALLL.
Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block]	Troubled Debt Restructurings Certain loan modifications or restructurings are accounted for as troubled debt restructurings (“TDR”). In general, the modification or restructuring of a debt is considered a TDR if, for economic or legal reasons related to the borrower’s financial difficulties, a concession is granted to the borrower that the Company would not otherwise consider. Examples of these modifications or restructurings include advancement of maturity date, accepting interest only payments for a period of time, or granting an interest rate concession for a period of time. The impaired portion of the loan with an interest rate concession and/or interest-only payments for a specific period of time are calculated based on the present value of expected future cash flows discounted at the loan’s effective interest rate. The effective interest rate is the rate of return implicit on the original loan. This impaired amount reduces the ALLL and a valuation allowance is established to reduce the loan balance. As loan payments are received in future periods, the ALLL entry is reversed and the valuation allowance is reduced utilizing the level yield method over the modification period. A loan that is determined to be classified as a TDR is generally reported as a TDR until the loan is paid in full or otherwise settled, sold, or charged-off.
Premises and Equipment	Premises and Equipment Premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets. The estimated useful lives used to compute depreciation and amortization is 15 to 40 years for buildings and building improvements, and is three to seven years for furniture, fixtures, and equipment. Leasehold improvements are amortized over the life of the lease. Management reviews buildings, improvements and equipment for impairment on an annual basis or whenever events or changes in the circumstances indicate that the undiscounted cash flows for the property are less than its carrying value. If identified, an impairment loss is recognized through a charge to earnings based on the fair value of the property.
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock As a member of the Federal Home Loan Bank System, the Bank is required to maintain a minimum level of investment in the Federal Home Loan Bank of Des Moines (“FHLB”) stock, based on specified percentages of outstanding mortgages and the Bank’s outstanding FHLB advances. Ownership of FHLB stock is restricted to the FHLB and member institutions. The Bank’s investment in FHLB stock is carried at par value ($100 per share), which reasonably approximates its fair value.
Other Real Estate Owned	Other Real Estate Owned OREO consists principally of properties acquired through foreclosure and is stated at the lower of cost or estimated market value less selling costs. Losses arising from the acquisition of property, in full or partial satisfaction of loans, are charged to the ALLL. Subsequent to the transfer of foreclosed assets held for sale, the assets continue to be recorded at the lower of cost or fair value (less estimated costs to sell), based on periodic evaluations. Subsequent write-downs in value are charged to noninterest expense. Generally, legal and professional fees associated with foreclosures are expensed as incurred. Costs incurred to improve property prior to sale are capitalized; however, in no event are recorded costs allowed to exceed estimated fair value. Subsequent gains, losses, or expenses recognized on the sale of these properties are included in noninterest expense. The amounts that will ultimately be recovered from foreclosed assets may differ substantially from the carrying value of the assets because of future market factors beyond management’s control.
Life Insurance, Corporate or Bank Owned [Text Block]	Bank-Owned Life Insurance The Company has purchased life insurance on certain key executives and officers. Bank-owned life insurance (“BOLI”) is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Increases to the cash surrender value are recorded as noninterest income and partially offset expenses for employee benefits.
Loan Commitments and Related Financial Instruments	Loan Commitments and Related Financial Instruments Financial instruments include off-balance sheet credit instruments, such as unused lines of credit and commercial letters of credit issued to meet customer financing needs. The face amount of these items represents the exposure to loss before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded.
Commitments and Contingencies, Policy [Policy Text Block]	Reserve for Unfunded Commitments Management maintains a reserve for unfunded commitments to absorb probable losses associated with our off-balance sheet commitments to lend funds such as unused lines of credit and the undisbursed portion of construction loans. Management determines the adequacy of the reserve based on reviews of individual exposures, current economic conditions, and other relevant factors. The reserve is based on estimates and ultimate losses may vary from the current estimates. The reserve is evaluated on a regular basis and necessary adjustments are reported in earnings during the period in which they become known. The reserve for unfunded commitments is included in the other liabilities section of the consolidated balance sheets.
Stock-Based Compensation	Stock-Based Compensation Compensation cost is recognized for stock options and restricted stock awards, based on the fair value of these awards at the grant date. A Black-Scholes model is utilized to estimate the fair value of stock options, while the market price of the Company’s common stock at the grant date is used for restricted stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award.
Federal Income Taxes	Federal Income Taxes The Company files a consolidated Federal income tax return and records its provision for income taxes under the asset and liability method. Deferred taxes result from temporary differences in the recognition of certain income and expense amounts between the Company’s financial statements and its tax return. The principal items giving rise to these differences include net operating losses, valuation adjustments on foreclosed properties, and allowance for credit losses. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which the deferred tax assets or liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. Valuation allowances are established to reduce the net carrying amount of deferred tax assets if it is determined to be more likely than not that all or some portion of the potential deferred tax asset will not be realized. The Company’s policy is to recognize interest and penalties associated with income tax matters in income tax expense.
Employee Stock Ownership Plan	Employee Stock Ownership Plan The cost of shares issued to the Employee Stock Ownership Plan (“ESOP”), but not yet allocated to participants, is shown as a reduction of stockholders’ equity. Compensation expense is based on the market price of shares as they are committed to be released to participant accounts. Dividends on allocated ESOP shares reduce retained earnings; dividends on unearned ESOP shares reduce debt and accrued interest.
Earnings Per Share (EPS)	Earnings Per Share Nonvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents are participating securities and are included in the computation of earnings per share (“EPS”) pursuant to the two-class method. The two-class method is an earnings allocation formula that determines EPS for each class of common stock and participating security according to dividends declared or accumulated and participation rights in undistributed earnings. Certain shares of the Company’s nonvested restricted stock awards qualify as participating securities. Net income is allocated between the common stock and participating securities pursuant to the two-class method, based on their rights to receive dividends, participate in earnings or absorb losses. Basic earnings per common share is computed by dividing net earnings available to common shareholders by the weighted average number of common shares outstanding during the period, excluding participating nonvested restricted shares. As ESOP shares are committed to be released, they are included in the outstanding shares used in the basic EPS calculation. Diluted earnings per share is computed in a similar manner, except that first the denominator is increased to include the number of additional shares that would have been outstanding if potentially dilutive shares, excluding the participating securities, were issued using the treasury stock method. For all periods presented, stock options and certain restricted stock awards are potentially dilutive non-participating instruments issued by the Company. Undistributed losses are not allocated to the nonvested share-based payment awards (the participating securities) under the two-class method as the holders are not contractually obligated to share in the losses of the Company.
Comprehensive Income	Comprehensive Income Comprehensive income consists of net income and unrealized gains and losses on investments available-for-sale and derivatives which are also recognized as separate components of equity, net of tax.
Advertising Expenses	Advertising Expenses Advertising costs are generally expensed as incurred.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in a separate note. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect the estimates.
Segment Information	Segment Information The Company’s activities are considered to be a single industry segment for financial reporting purposes. The Company is engaged in the business of attracting deposits from the general public and providing lending services. Substantially all income is derived from a diverse base of investments and commercial, construction, mortgage, and consumer lending activities.
Reclassification, Policy [Policy Text Block]	Reclassification Certain amounts in the consolidated financial statements for prior years have been reclassified to conform to the current consolidated financial statement presentation. The results of the reclassifications are not considered material and have no effect on previously reported net income or stockholders’ equity.
Derivatives, Policy [Policy Text Block]	Derivatives The Company recognizes its interest rate swap as a cash flow hedge derivative instrument, and as such, reports the fair value as an asset or liability. Fair value is based on dealer quotes, pricing models, discounted cash flow methodologies or similar techniques for which the determination of fair value may require significant management judgment or estimation. The derivative is marked to its fair value through other comprehensive income. Any ineffectiveness is recognized in earnings. The gain or loss on the derivative is removed from equity and recognized in earnings in the same period the corresponding loss or gain on the hedged cash flow is recognized in earnings.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customer (Topic 606). In August 2015, FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606) which postponed the effective date of 2014-09. Subsequently, in March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations. This amendment clarifies that an entity should determine if it is the principal or the agent for each specified good or service promised in a contract with a customer. In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing. The core principle of Topic 606 is that an entity must recognize revenue when it has satisfied a performance obligation of transferring promised goods or services to a customer. The standard is effective for public entities for interim and annual periods beginning after December 15, 2017; early adoption is not permitted. The standard allows for full retrospective adoption for all periods presented or modified retrospective adoption to only the most current period presented in the financial statements. The cumulative effect of initially applying the standard is recognized at the date of the initial application. Our primary source of revenue is interest income, which is recognized as it is earned and is deemed to be in compliance with this ASU. The Company does not expect implementation of this standard to have a material impact on our consolidated financial statements. In January 2016, FASB issued ASU No. 2016-01, Financial Instruments--Overall, Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 requires equity investments (except those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income. The amendments in this update also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in instrument-specific credit risk. In addition, the ASU eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The ASU also clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. The amendments in this update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early application is permitted for fiscal years or interim periods that have not yet been issued if adopted at the beginning of the fiscal year. The Company is reviewing our available-for-sale investment portfolio in accordance with the provision of this standard. The adoption of ASU 2016-01 is not expected to have a material impact on the Company’s consolidated financial statements.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2016

Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Policy [Policy Text Block]

Transfer of Financial Assets

Transfers of an entire financial asset, a group of entire financial assets, or participating interest in an entire financial asset 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 Bank, (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 Bank does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.

Basis of Presentation and Use of Estimates

Nature of Operations and Principles of Consolidation

First Financial Northwest, Inc. (“First Financial Northwest”), a Washington corporation, was formed on June 1, 2007 for the purpose of becoming the holding company for First Financial Northwest Bank (“the Bank”) in connection with the conversion from a mutual holding company structure to a stock holding company structure completed on October 9, 2007. First Financial Northwest’s business activities generally are limited to passive investment activities and oversight of its investment in First Financial Northwest Bank. Accordingly, the information presented in the consolidated financial statements and related data, relates primarily to First Financial Northwest Bank. First Financial Northwest converted from a savings and loan holding company to a bank holding company in 2015 and is subject to regulation by the Board of Governors of the Federal Reserve Bank of San Francisco (“FRB”) as the successor to the Office of Thrift Supervision (“OTS”). First Financial Northwest Bank is regulated by the Federal Deposit Insurance Corporation (“FDIC”) and the Washington State Department of Financial Institutions (“DFI”).

First Financial Northwest Bank was organized in 1923 as a Washington state-chartered savings and loan association, converted to a federal mutual savings and loan association in 1935, and converted to a Washington state-chartered mutual savings bank in 1992. In 2002, First Financial Northwest Bank reorganized into a two-tier mutual holding company structure, became a stock savings bank and became the wholly-owned subsidiary of First Financial of Renton, Inc. In connection with the mutual to stock conversion in 2007, the Bank changed its name to First Savings Bank Northwest. In August 2015, the Bank changed its name to First Financial Northwest Bank to support the expansion of focus to being more than a traditional “savings” bank and in February 4, 2016 changed its charter from a Washington chartered stock savings bank to a Washington chartered commercial bank.

First Financial Northwest Bank is a community-based commercial bank primarily serving King and Snohomish Counties, and to a lesser extent, Pierce and Kitsap Counties, Washington. In King County, the headquarters and full-service banking office as well as a branch office are located in Renton. In Snohomish County, two additional branch offices serve Mill Creek and Edmonds. First Financial Northwest Bank’s business consists of attracting deposits from the public and utilizing these deposits to originate one-to-four family residential, multifamily, commercial real estate, construction/land, business and consumer loans.

First Financial Diversified Corporation (“FFD”), a wholly-owned subsidiary of First Financial Northwest, continues to hold a portfolio of one-to-four family, land and consumer loans that are serviced by the Bank. At December 31, 2016, FFD had net loans receivable of $2.4 million that were all performing.

The accompanying consolidated financial statements include the accounts of First Financial Northwest and its wholly‑owned subsidiaries First Financial Northwest Bank and First Financial Diversified Corporation (collectively, “the Company”). All significant intercompany balances and transactions between First Financial Northwest and its subsidiaries have been eliminated in consolidation.

Basis of Presentation and Use of Estimates

The accounting and reporting policies of First Financial Northwest and its subsidiaries conform to U.S. generally accepted accounting principles (“GAAP”). In preparing the consolidated financial statements, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided. Actual results could differ from these estimates. Material estimates particularly subject to change include the allowance for loan and lease losses (“ALLL”), other real estate owned (“OREO”), deferred tax assets and the fair values of financial instruments.

Subsequent Events

The Company has evaluated events and transactions subsequent to December 31, 2016 for potential recognition or disclosure. See Note 18 - Subsequent Events for more information.

Cash and Cash Equivalents

For purposes of reporting cash flows, cash and cash equivalents include cash on hand and in banks, interest-bearing deposits and federal funds sold all with maturities of three months or less.

The Bank is required to maintain an average reserve balance with the FRB or maintain such reserve balance in the form of cash. The required reserve balance was $228,000 at December 31, 2016, and $434,000 at December 31, 2015.

Investments

Investments are classified into one of three categories: (1) held-to-maturity, (2) available-for-sale, or (3) trading. We had no held-to-maturity or trading securities at December 31, 2016, or 2015. Investments are categorized as held-to-maturity when we have the positive intent and ability to hold them to maturity.

Investments are classified as available-for-sale if the Company intends to hold the securities for an indefinite period of time, but not necessarily to maturity. Investments available-for-sale are reported at fair value. Unrealized holding gains and losses on investments available-for-sale are excluded from earnings and are reported in other comprehensive income (loss), net of applicable taxes. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. Amortization or accretion of purchase premiums and discounts are included in investment income using the level-yield method over the remaining period to contractual maturity. Dividend or interest income is recognized when it is earned.

The estimated fair value of investments is based on quoted market prices for investments traded in active markets or dealer quotes. Mortgage-backed investments represent participation interest in pools of first mortgage loans originated and serviced by the issuers of the investments.

Management makes an assessment to determine whether there have been any events or economic circumstances to indicate that a security on which there is an unrealized loss is impaired on an other-than-temporary basis. Management considers many factors including the severity and duration of the impairment, recent events specific to the issuer or industry, and for debt securities, external credit ratings and recent downgrades. Securities on which there is an unrealized loss that is deemed to be an other-than-temporary impairment (“OTTI”) are written down to fair value. For equity securities, the write-down is recorded as a realized loss in noninterest income in the Consolidated Income Statements. For debt securities, if management intends to sell the security or it is likely that management will be required to sell the security before recovering its cost basis, the entire impairment loss would be recognized in earnings as an OTTI. If management does not intend to sell the security and it is not likely that management will be required to sell the security but management does not expect to recover the entire amortized cost basis of the security, only the portion of the impairment loss representing credit losses would be recognized in earnings. The credit loss on a security is measured as the difference between the amortized cost basis and the present value of the cash flows expected to be collected. Projected cash flows are discounted by the original or current effective interest rate depending on the nature of the security being measured for potential OTTI. The remaining impairment related to all other factors, the difference between the present value of the cash flows expected to be collected and fair value, is recognized as a charge to other comprehensive income (“OCI”). Impairment losses related to all other factors are presented as separate categories within OCI.

Loans Receivable

Loans are recorded at their outstanding principal balance adjusted for charge-offs, the ALLL and net deferred fees or costs. Interest on loans is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income using the level-yield method without anticipating prepayments.

The accrual of interest on loans is discontinued at the time the loan is 90 days delinquent unless the loan is well secured and in the process of collection. Consumer and other loans are typically managed in the same manner. In all cases, loans are placed on nonaccrual or charged-off at an earlier date if collection of principal or interest is doubtful.

All interest accrued but not collected on loans that are placed on nonaccrual is reversed against interest income. Loans are returned to accrual status when all principal and interest amounts contractually due are brought current and future payments are reasonably assured. In order to return a nonaccrual loan to accrual status, each loan is evaluated on a case-by-case basis. We evaluate the borrower’s financial condition to ensure that future loan payments are reasonably assured. We also take into consideration the borrower’s willingness and ability to make the loan payments and historical repayment performance. We require the borrower to make the loan payments consistently for a period of at least six months as agreed to under the terms of any modified loan agreement before we will consider reclassifying the loan to accrual status.

Allowance for Loan and Lease Losses (ALLL)

Allowance for Loan and Lease Losses

The allowance for loan and lease losses (“ALLL”) is a valuation allowance for probable incurred credit losses. Losses are charged against the allowance when management believes the uncollectability of a loan balance is confirmed. Any subsequent recoveries are credited to the allowance.

The ALLL is evaluated on a regular basis by management and is based upon management’s periodic review of the collectability of the loans and factors such as the nature and volume of the loan portfolio, historical loss considerations, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. The evaluation is inherently subjective, as it requires estimates that are susceptible to significant revision as more information becomes available.

While management uses available information to recognize losses on loans, future additions to the allowance may be necessary based on changes in economic conditions or changes to the credit quality of the loan portfolio. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Company’s ALLL. Such agencies may require management to make adjustments to the allowance based on their judgments about information available to them at the time of their examination.

Impaired Loans

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, market conditions, rent rolls and the financial strength of the borrower(s) and guarantor(s), if any. 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 borrowers, including the length of the delay, the reasons for the delay, the borrower’s prior payment history and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured by the fair value method on a loan-by-loan basis.

When a loan is identified as impaired, its impairment is measured using the present value of expected future cash flows, discounted at the loan’s effective interest rate, except when the sole (remaining) source of repayment for the loan is the operation or liquidation of the collateral. In these cases, the Company uses an observable market price or current fair value of the collateral, less certain completion costs and closing costs when foreclosure is probable, instead of discounted cash flows. The Company obtains annual updated appraisals for impaired collateral dependent loans that exceed $1.0 million and loans that have been transferred to OREO. In addition, the Company may order appraisals on properties not included within these guidelines when there are extenuating circumstances where the Company is not otherwise able to determine the fair value of the property. Appraised values may be discounted based on management’s historical knowledge, changes in market conditions from the time of valuation and/or management’s expertise and knowledge of the borrower. If management determines that the value of the impaired loan is less than the recorded investment in the loan, an impairment is recognized through an allowance estimate or a charge-off to the ALLL.

Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block]

Troubled Debt Restructurings

Certain loan modifications or restructurings are accounted for as troubled debt restructurings (“TDR”). In general, the modification or restructuring of a debt is considered a TDR if, for economic or legal reasons related to the borrower’s financial difficulties, a concession is granted to the borrower that the Company would not otherwise consider. Examples of these modifications or restructurings include advancement of maturity date, accepting interest only payments for a period of time, or granting an interest rate concession for a period of time. The impaired portion of the loan with an interest rate concession and/or interest-only payments for a specific period of time are calculated based on the present value of expected future cash flows discounted at the loan’s effective interest rate. The effective interest rate is the rate of return implicit on the original loan. This impaired amount reduces the ALLL and a valuation allowance is established to reduce the loan balance. As loan payments are received in future periods, the ALLL entry is reversed and the valuation allowance is reduced utilizing the level yield method over the modification period. A loan that is determined to be classified as a TDR is generally reported as a TDR until the loan is paid in full or otherwise settled, sold, or charged-off.

Premises and Equipment

Premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets. The estimated useful lives used to compute depreciation and amortization is 15 to 40 years for buildings and building improvements, and is three to seven years for furniture, fixtures, and equipment. Leasehold improvements are amortized over the life of the lease. Management reviews buildings, improvements and equipment for impairment on an annual basis or whenever events or changes in the circumstances indicate that the undiscounted cash flows for the property are less than its carrying value. If identified, an impairment loss is recognized through a charge to earnings based on the fair value of the property.

Federal Home Loan Bank Stock

As a member of the Federal Home Loan Bank System, the Bank is required to maintain a minimum level of investment in the Federal Home Loan Bank of Des Moines (“FHLB”) stock, based on specified percentages of outstanding mortgages and the Bank’s outstanding FHLB advances. Ownership of FHLB stock is restricted to the FHLB and member institutions. The Bank’s investment in FHLB stock is carried at par value ($100 per share), which reasonably approximates its fair value.

Other Real Estate Owned

OREO consists principally of properties acquired through foreclosure and is stated at the lower of cost or estimated market value less selling costs. Losses arising from the acquisition of property, in full or partial satisfaction of loans, are charged to the ALLL.

Subsequent to the transfer of foreclosed assets held for sale, the assets continue to be recorded at the lower of cost or fair value (less estimated costs to sell), based on periodic evaluations. Subsequent write-downs in value are charged to noninterest expense. Generally, legal and professional fees associated with foreclosures are expensed as incurred. Costs incurred to improve property prior to sale are capitalized; however, in no event are recorded costs allowed to exceed estimated fair value. Subsequent gains, losses, or expenses recognized on the sale of these properties are included in noninterest expense. The amounts that will ultimately be recovered from foreclosed assets may differ substantially from the carrying value of the assets because of future market factors beyond management’s control.

Life Insurance, Corporate or Bank Owned [Text Block]

Bank-Owned Life Insurance

The Company has purchased life insurance on certain key executives and officers. Bank-owned life insurance (“BOLI”) is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Increases to the cash surrender value are recorded as noninterest income and partially offset expenses for employee benefits.

Loan Commitments and Related Financial Instruments

Financial instruments include off-balance sheet credit instruments, such as unused lines of credit and commercial letters of credit issued to meet customer financing needs. The face amount of these items represents the exposure to loss before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded.

Commitments and Contingencies, Policy [Policy Text Block]

Reserve for Unfunded Commitments

Management maintains a reserve for unfunded commitments to absorb probable losses associated with our off-balance sheet commitments to lend funds such as unused lines of credit and the undisbursed portion of construction loans. Management determines the adequacy of the reserve based on reviews of individual exposures, current economic conditions, and other relevant factors. The reserve is based on estimates and ultimate losses may vary from the current estimates. The reserve is evaluated on a regular basis and necessary adjustments are reported in earnings during the period in which they become known. The reserve for unfunded commitments is included in the other liabilities section of the consolidated balance sheets.

Stock-Based Compensation

Compensation cost is recognized for stock options and restricted stock awards, based on the fair value of these awards at the grant date. A Black-Scholes model is utilized to estimate the fair value of stock options, while the market price of the Company’s common stock at the grant date is used for restricted stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award.

Federal Income Taxes

The Company files a consolidated Federal income tax return and records its provision for income taxes under the asset and liability method. Deferred taxes result from temporary differences in the recognition of certain income and expense amounts between the Company’s financial statements and its tax return. The principal items giving rise to these differences include net operating losses, valuation adjustments on foreclosed properties, and allowance for credit losses. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which the deferred tax assets or liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. Valuation allowances are established to reduce the net carrying amount of deferred tax assets if it is determined to be more likely than not that all or some portion of the potential deferred tax asset will not be realized. The Company’s policy is to recognize interest and penalties associated with income tax matters in income tax expense.

Employee Stock Ownership Plan

The cost of shares issued to the Employee Stock Ownership Plan (“ESOP”), but not yet allocated to participants, is shown as a reduction of stockholders’ equity. Compensation expense is based on the market price of shares as they are committed to be released to participant accounts. Dividends on allocated ESOP shares reduce retained earnings; dividends on unearned ESOP shares reduce debt and accrued interest.

Earnings Per Share (EPS)

Earnings Per Share

Nonvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents are participating securities and are included in the computation of earnings per share (“EPS”) pursuant to the two-class method. The two-class method is an earnings allocation formula that determines EPS for each class of common stock and participating security according to dividends declared or accumulated and participation rights in undistributed earnings. Certain shares of the Company’s nonvested restricted stock awards qualify as participating securities.

Net income is allocated between the common stock and participating securities pursuant to the two-class method, based on their rights to receive dividends, participate in earnings or absorb losses. Basic earnings per common share is computed by dividing net earnings available to common shareholders by the weighted average number of common shares outstanding during the period, excluding participating nonvested restricted shares. As ESOP shares are committed to be released, they are included in the outstanding shares used in the basic EPS calculation.

Diluted earnings per share is computed in a similar manner, except that first the denominator is increased to include the number of additional shares that would have been outstanding if potentially dilutive shares, excluding the participating securities, were issued using the treasury stock method. For all periods presented, stock options and certain restricted stock awards are potentially dilutive non-participating instruments issued by the Company.

Undistributed losses are not allocated to the nonvested share-based payment awards (the participating securities) under the two-class method as the holders are not contractually obligated to share in the losses of the Company.

Comprehensive Income

Comprehensive income consists of net income and unrealized gains and losses on investments available-for-sale and derivatives which are also recognized as separate components of equity, net of tax.

Advertising Expenses

Advertising costs are generally expensed as incurred.

Fair Value of Financial Instruments

Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in a separate note. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect the estimates.

Segment Information

The Company’s activities are considered to be a single industry segment for financial reporting purposes. The Company is engaged in the business of attracting deposits from the general public and providing lending services. Substantially all income is derived from a diverse base of investments and commercial, construction, mortgage, and consumer lending activities.

Reclassification, Policy [Policy Text Block]

Reclassification

Certain amounts in the consolidated financial statements for prior years have been reclassified to conform to the current consolidated financial statement presentation. The results of the reclassifications are not considered material and have no effect on previously reported net income or stockholders’ equity.

Derivatives, Policy [Policy Text Block]

Derivatives

The Company recognizes its interest rate swap as a cash flow hedge derivative instrument, and as such, reports the fair value as an asset or liability. Fair value is based on dealer quotes, pricing models, discounted cash flow methodologies or similar techniques for which the determination of fair value may require significant management judgment or estimation. The derivative is marked to its fair value through other comprehensive income. Any ineffectiveness is recognized in earnings. The gain or loss on the derivative is removed from equity and recognized in earnings in the same period the corresponding loss or gain on the hedged cash flow is recognized in earnings.

Recently Issued Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customer (Topic 606). In August 2015, FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606) which postponed the effective date of 2014-09. Subsequently, in March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations. This amendment clarifies that an entity should determine if it is the principal or the agent for each specified good or service promised in a contract with a customer. In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing. The core principle of Topic 606 is that an entity must recognize revenue when it has satisfied a performance obligation of transferring promised goods or services to a customer. The standard is effective for public entities for interim and annual periods beginning after December 15, 2017; early adoption is not permitted. The standard allows for full retrospective adoption for all periods presented or modified retrospective adoption to only the most current period presented in the financial statements. The cumulative effect of initially applying the standard is recognized at the date of the initial application. Our primary source of revenue is interest income, which is recognized as it is earned and is deemed to be in compliance with this ASU. The Company does not expect implementation of this standard to have a material impact on our consolidated financial statements.

In January 2016, FASB issued ASU No. 2016-01, Financial Instruments--Overall, Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 requires equity investments (except those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income. The amendments in this update also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in instrument-specific credit risk. In addition, the ASU eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The ASU also clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. The amendments in this update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early application is permitted for fiscal years or interim periods that have not yet been issued if adopted at the beginning of the fiscal year. The Company is reviewing our available-for-sale investment portfolio in accordance with the provision of this standard. The adoption of ASU 2016-01 is not expected to have a material impact on the Company’s consolidated financial statements.