Basis of Presentation and Critical Accounting Policies	6 Months Ended
Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Critical Accounting Policies	Basis of Presentation and Critical Accounting Policies Organization and Nature of business - First Northwest Bancorp, a Washington corporation, became the holding company of First Federal Savings and Loan Association of Port Angeles, on January 29, 2015, upon completion of the Bank's conversion from a mutual to stock form of organization (the "Conversion"). In connection with the Conversion, the Company issued an aggregate of 12,167,000 shares of common stock at an offering price of $10.00 per share for gross proceeds of $121.7 million. An additional 933,360 shares of Company common stock and $400,000 in cash were contributed to the First Federal Community Foundation ("Foundation"), a charitable foundation that was established in connection with the Conversion, resulting in the issuance of a total of 13,100,360 shares. The Company received $117.6 million in net proceeds from the stock offering of which $58.4 million were contributed to the Bank upon Conversion. Pursuant to the Bank's Plan of Conversion (the "Plan") adopted by its Board of Directors, and as approved by its members, the Company established an employee stock ownership plan ("ESOP") which purchased in the open market, with funds borrowed from the Company, 8% of the common stock issued in the Conversion for a total of 1,048,029 shares. First Northwest's business activities generally are limited to passive investment activities and oversight of its investment in First Federal. Accordingly, the information set forth in this report, including the consolidated unaudited financial statements and related data, relates primarily to the Bank. The Bank provides commercial and consumer banking services to individuals and businesses located primarily on the Olympic Peninsula in the State of Washington. These services include deposit and lending transactions that are supplemented with other borrowing and investing activities. Basis of presentation - The accompanying unaudited interim consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Accordingly, they do not include all of the information and footnotes required by U.S. Generally Accepted Accounting Principles ("GAAP") for complete financial statements. These unaudited interim consolidated financial statements should be read in conjunction with our audited consolidated financial statements and accompanying notes included in the Company's Annual Report on Form 10-K for the fiscal year ended June 30, 2016. In our opinion, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation of the consolidated financial statements in accordance with GAAP have been included. Operating results for the three and six months ended December 31, 2016, are not necessarily indicative of the results that may be expected for the year ended June 30, 2017. In preparing the unaudited interim consolidated financial statements, we are required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, and expenses. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to a determination of the allowance for loan losses ("ALLL"), mortgage servicing rights, fair value of financial instruments, deferred tax assets and liabilities, and the valuation of impaired loans. The Company completed its stock offering and became a public company on January 29, 2015. The Conversion was accounted for as a change in corporate form with the historic basis of the Bank's assets, liabilities, and equity unchanged as a result. Principles of consolidation - The accompanying consolidated financial statements include the accounts of First Northwest Bancorp; its wholly owned subsidiary, First Federal; and First Federal's wholly owned subsidiary, North Olympic Peninsula Services, Inc. ("NOPS"), majority-owned Craft3 Development IV, LLC ("Craft3"), and majority-owned 202 Master Tenant, LLC ("Master Tenant"). NOPS was dissolved on February 12, 2016, at which time the building owned by NOPS and rented in whole to First Federal became the property of the Bank. Craft3 is a partnership investment formed to provide a loan qualifying under the New Markets Tax Credit ("NMTC") rules. The Craft3 partnership was a seven year commitment, commensurate with the NMTC period, which expired June 6, 2015. First Federal subsequently entered into a membership redemption and assignment agreement which terminated its membership interest in the Craft3 partnership effective September 30, 2015. In August 2016, First Federal entered into a partnership with the Peninsula College Foundation forming 202 Master Tenant, LLC. An initial equity contribution of $274,000 was made in September 2016 with a final contribution of $1.1 million due once a historic tax credit has been granted and all remaining items outlined in the agreement are satisfied. All material intercompany accounts and transactions have been eliminated in consolidation. Subsequent Events - The Company has evaluated subsequent events for potential recognition and disclosure and determined there are no such events or transactions requiring recognition or disclosure. Recently issued accounting pronouncements - In August 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-14, Revenue from Contracts with Customers (Topic 606), which defers the effective date of ASU No. 2014-09 one year. ASU No. 2014-09 created Topic 606 and supersedes Topic 605, Revenue Recognition. The core principle of Topic 606 is that an entity recognizes 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. In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU No. 2015-14 is effective for public entities for interim and annual periods beginning after December 15, 2017; early adoption is permitted for interim and annual periods beginning after December 15, 2016. For financial reporting purposes, the standard allows for either full retrospective adoption, meaning the standard is applied to all of the periods presented, or modified retrospective adoption, meaning the standard is applied only to the most current period presented in the financial statements with the cumulative effect of initially applying the standard recognized at the date of initial application. The Company is in the process of evaluating each of its major non-interest income sources in order to determine the impact of ASU 2014-09 on its financial condition and results of operations. The significant implementation matters yet to be addressed include completion of the aforementioned items. In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. The main provisions of this ASU address the valuation and impairment of equity securities along with enhanced disclosures about those investments. Equity securities with readily determinable fair values will be treated in the same manner as other financial instruments. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of ASU 2016-01 will not have a material impact on the Company's consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases. ASU 2016-02 is intended to increase transparency and comparability among organizations by requiring the recognition of lease assets and lease liabilities on the balance sheet and disclosure of key information about leasing arrangements. The principal change required by this ASU relates to lessee accounting, and is that for operating leases, a lessee is required to (1) recognize a right-of-use asset and a lease liability, initially measured at the present value of the lease payments, in the statement of financial position, (2) recognize a single lease cost, calculated so that the cost of the lease is allocated over the lease term on a generally straight-line basis, and (3) classify all cash payments within operating activities in the statement of cash flows. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. ASU 2016-02 also changes disclosure requirements related to leasing activities, and requires certain qualitative disclosures along with specific quantitative disclosures. The amendments in ASU 2016-02 are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Early application of the amendments in ASU 2016-02 is permitted. The Company will be compiling an inventory of all leased assets to determine the impact of ASU 2016-02 on its financial condition and results of operations. Once adopted, we expect to report higher assets and liabilities as a result of including additional leases on the Consolidated Balance Sheet. We do not expect the guidance to have a material impact on the Consolidated Statements of Income or Consolidated Changes in Shareholders' Equity. The significant implementation matters yet to be addressed include completion of the aforementioned items. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. This ASU includes provisions intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. ASU 2016-09 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2016. The Company has early-adopted this ASU and the adoption did not have a material impact on the Company's consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Loss, which updates the guidance on recognition and measurement of credit losses for financial assets. The new requirements, known as the current expected credit loss model (CECL) will require entities to adopt an impairment model based on expected losses rather than incurred losses. ASU No. 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is reviewing the requirements of ASU 2016-13 via educational classes, webinars, and training. Management will begin data evaluation and loan portfolio stratification. Management will also review and determine the appropriate methodologies to implement for application of this ASU to our investment portfolio. At this time, we anticipate the ALLL will increase as a result of the implementation of this ASU. The significant implementation matters yet to be addressed include completion of the aforementioned items. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The ASU provides specific guidance on eight classification issues in order to achieve more consistent reporting. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted. The adoption of ASU No. 2016-15 will not have a material impact on the Company's consolidated financial statements. In January 2017, the FASB issued ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments-Equity Method and Joint Ventures (Topic 323). This ASU amends the Codification for SEC staff announcements made at recent Emerging Issues Task Force (EITF) meetings. The SEC guidance that specifically relates to our consolidated financial statements was from the September 2016 meeting, where the SEC staff expressed their expectations about the extent of disclosures registrants should make about the effects of the new FASB guidance as well as any amendments issued prior to adoption, on revenue (ASU 2014-09), leases (ASU 2016-02) and credit losses on financial instruments (ASU 2016-13) in accordance with SAB Topic 11.M. Registrants are required to disclose the effect that recently issued accounting standards will have on their financial statements when adopted in a future period. In cases where a registrant cannot reasonably estimate the impact of the adoption, then additional qualitative disclosures should be considered. The ASU incorporates these SEC staff views into ASC 250 and adds references to that guidance in the transition paragraphs of each of the three new standards. The adoption of this ASU did not have a material effect on the Company's consolidated financial statements. Reclassifications - Certain amounts in the unaudited interim consolidated financial statements for prior periods have been reclassified to conform to the current unaudited financial statement presentation with no effect on net income or shareholders' equity.

Basis of Presentation and Critical Accounting Policies

Organization and Nature of business - First Northwest Bancorp, a Washington corporation, became the holding company of First Federal Savings and Loan Association of Port Angeles, on January 29, 2015, upon completion of the Bank's conversion from a mutual to stock form of organization (the "Conversion"). In connection with the Conversion, the Company issued an aggregate of 12,167,000 shares of common stock at an offering price of $10.00 per share for gross proceeds of $121.7 million. An additional 933,360 shares of Company common stock and $400,000 in cash were contributed to the First Federal Community Foundation ("Foundation"), a charitable foundation that was established in connection with the Conversion, resulting in the issuance of a total of 13,100,360 shares. The Company received $117.6 million in net proceeds from the stock offering of which $58.4 million were contributed to the Bank upon Conversion.

Pursuant to the Bank's Plan of Conversion (the "Plan") adopted by its Board of Directors, and as approved by its members, the Company established an employee stock ownership plan ("ESOP") which purchased in the open market, with funds borrowed from the Company, 8% of the common stock issued in the Conversion for a total of 1,048,029 shares.

First Northwest's business activities generally are limited to passive investment activities and oversight of its investment in First Federal. Accordingly, the information set forth in this report, including the consolidated unaudited financial statements and related data, relates primarily to the Bank.

The Bank provides commercial and consumer banking services to individuals and businesses located primarily on the Olympic Peninsula in the State of Washington. These services include deposit and lending transactions that are supplemented with other borrowing and investing activities.

Basis of presentation - The accompanying unaudited interim consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Accordingly, they do not include all of the information and footnotes required by U.S. Generally Accepted Accounting Principles ("GAAP") for complete financial statements. These unaudited interim consolidated financial statements should be read in conjunction with our audited consolidated financial statements and accompanying notes included in the Company's Annual Report on Form 10-K for the fiscal year ended June 30, 2016. In our opinion, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation of the consolidated financial statements in accordance with GAAP have been included. Operating results for the three and six months ended December 31, 2016, are not necessarily indicative of the results that may be expected for the year ended June 30, 2017. In preparing the unaudited interim consolidated financial statements, we are required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, and expenses. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to a determination of the allowance for loan losses ("ALLL"), mortgage servicing rights, fair value of financial instruments, deferred tax assets and liabilities, and the valuation of impaired loans.

The Company completed its stock offering and became a public company on January 29, 2015. The Conversion was accounted for as a change in corporate form with the historic basis of the Bank's assets, liabilities, and equity unchanged as a result.

Principles of consolidation - The accompanying consolidated financial statements include the accounts of First Northwest Bancorp; its wholly owned subsidiary, First Federal; and First Federal's wholly owned subsidiary, North Olympic Peninsula Services, Inc. ("NOPS"), majority-owned Craft3 Development IV, LLC ("Craft3"), and majority-owned 202 Master Tenant, LLC ("Master Tenant"). NOPS was dissolved on February 12, 2016, at which time the building owned by NOPS and rented in whole to First Federal became the property of the Bank. Craft3 is a partnership investment formed to provide a loan qualifying under the New Markets Tax Credit ("NMTC") rules. The Craft3 partnership was a seven year commitment, commensurate with the NMTC period, which expired June 6, 2015. First Federal subsequently entered into a membership redemption and assignment agreement which terminated its membership interest in the Craft3 partnership effective September 30, 2015. In August 2016, First Federal entered into a partnership with the Peninsula College Foundation forming 202 Master Tenant, LLC. An initial equity contribution of $274,000 was made in September 2016 with a final contribution of $1.1 million due once a historic tax credit has been granted and all remaining items outlined in the agreement are satisfied. All material intercompany accounts and transactions have been eliminated in consolidation.

Subsequent Events - The Company has evaluated subsequent events for potential recognition and disclosure and determined there are no such events or transactions requiring recognition or disclosure.

Recently issued accounting pronouncements - In August 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-14, Revenue from Contracts with Customers (Topic 606), which defers the effective date of ASU No. 2014-09 one year. ASU No. 2014-09 created Topic 606 and supersedes Topic 605, Revenue Recognition. The core principle of Topic 606 is that an entity recognizes 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. In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU No. 2015-14 is effective for public entities for interim and annual periods beginning after December 15, 2017; early adoption is permitted for interim and annual periods beginning after December 15, 2016. For financial reporting purposes, the standard allows for either full retrospective adoption, meaning the standard is applied to all of the periods presented, or modified retrospective adoption, meaning the standard is applied only to the most current period presented in the financial statements with the cumulative effect of initially applying the standard recognized at the date of initial application. The Company is in the process of evaluating each of its major non-interest income sources in order to determine the impact of ASU 2014-09 on its financial condition and results of operations. The significant implementation matters yet to be addressed include completion of the aforementioned items.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. The main provisions of this ASU address the valuation and impairment of equity securities along with enhanced disclosures about those investments. Equity securities with readily determinable fair values will be treated in the same manner as other financial instruments. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of ASU 2016-01 will not have a material impact on the Company's consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. ASU 2016-02 is intended to increase transparency and comparability among organizations by requiring the recognition of lease assets and lease liabilities on the balance sheet and disclosure of key information about leasing arrangements. The principal change required by this ASU relates to lessee accounting, and is that for operating leases, a lessee is required to (1) recognize a right-of-use asset and a lease liability, initially measured at the present value of the lease payments, in the statement of financial position, (2) recognize a single lease cost, calculated so that the cost of the lease is allocated over the lease term on a generally straight-line basis, and (3) classify all cash payments within operating activities in the statement of cash flows. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. ASU 2016-02 also changes disclosure requirements related to leasing activities, and requires certain qualitative disclosures along with specific quantitative disclosures. The amendments in ASU 2016-02 are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Early application of the amendments in ASU 2016-02 is permitted. The Company will be compiling an inventory of all leased assets to determine the impact of ASU 2016-02 on its financial condition and results of operations. Once adopted, we expect to report higher assets and liabilities as a result of including additional leases on the Consolidated Balance Sheet. We do not expect the guidance to have a material impact on the Consolidated Statements of Income or Consolidated Changes in Shareholders' Equity. The significant implementation matters yet to be addressed include completion of the aforementioned items.

In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. This ASU includes provisions intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. ASU 2016-09 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2016. The Company has early-adopted this ASU and the adoption did not have a material impact on the Company's consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Loss, which updates the guidance on recognition and measurement of credit losses for financial assets. The new requirements, known as the current expected credit loss model (CECL) will require entities to adopt an impairment model based on expected losses rather than incurred losses. ASU No. 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is reviewing the requirements of ASU 2016-13 via educational classes, webinars, and training. Management will begin data evaluation and loan portfolio stratification. Management will also review and determine the appropriate methodologies to implement for application of this ASU to our investment portfolio. At this time, we anticipate the ALLL will increase as a result of the implementation of this ASU. The significant implementation matters yet to be addressed include completion of the aforementioned items.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The ASU provides specific guidance on eight classification issues in order to achieve more consistent reporting. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted. The adoption of ASU No. 2016-15 will not have a material impact on the Company's consolidated financial statements.

In January 2017, the FASB issued ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments-Equity Method and Joint Ventures (Topic 323). This ASU amends the Codification for SEC staff announcements made at recent Emerging Issues Task Force (EITF) meetings. The SEC guidance that specifically relates to our consolidated financial statements was from the September 2016 meeting, where the SEC staff expressed their expectations about the extent of disclosures registrants should make about the effects of the new FASB guidance as well as any amendments issued prior to adoption, on revenue (ASU 2014-09), leases (ASU 2016-02) and credit losses on financial instruments (ASU 2016-13) in accordance with SAB Topic 11.M. Registrants are required to disclose the effect that recently issued accounting standards will have on their financial statements when adopted in a future period. In cases where a registrant cannot reasonably estimate the impact of the adoption, then additional qualitative disclosures should be considered. The ASU incorporates these SEC staff views into ASC 250 and adds references to that guidance in the transition paragraphs of each of the three new standards. The adoption of this ASU did not have a material effect on the Company's consolidated financial statements.

Reclassifications - Certain amounts in the unaudited interim consolidated financial statements for prior periods have been reclassified to conform to the current unaudited financial statement presentation with no effect on net income or shareholders' equity.