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Summary Of Significant Accounting Policies | 6 Months Ended
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Mar. 31, 2019
Accounting Policies [Abstract] |
Summary Of Significant Accounting Policies | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (a) Basis of Presentation: The accompanying unaudited consolidated financial statements for Timberland Bancorp, Inc. (the "Company") and its wholly-owned subsidiary, Timberland Bank (the "Bank") were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with instructions for Form 10-Q and, therefore, do not include all disclosures necessary for a complete presentation of consolidated financial condition, results of operations, and cash flows in conformity with GAAP. However, all adjustments which are, in the opinion of management, necessary for a fair presentation of the interim consolidated financial statements have been included. All such adjustments are of a normal recurring nature. The unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended September 30, 2018 (“2018 Form 10-K”). The unaudited consolidated results of operations for the six months ended March 31, 2019 are not necessarily indicative of the results that may be expected for the entire fiscal year ending September 30, 2019. On October 1, 2018, the Company completed the acquisition of South Sound Bank, a Washington-state chartered bank, headquartered in Olympia, Washington ("South Sound Merger"). The Company acquired 100% of the outstanding common stock of South Sound Bank, and South Sound Bank was merged into the Bank. See Note 2 for additional information on the South Sound Merger. (b) Principles of Consolidation: The unaudited consolidated financial statements include the accounts of the Company and the Bank, and the Bank’s wholly-owned subsidiary, Timberland Service Corporation. All significant inter-company transactions and balances have been eliminated in consolidation. (c) Operating Segment: The Company has one reportable operating segment which is defined as community banking in western Washington. (d) The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities, as of the date of the consolidated balance sheets, and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates. (e) Certain prior period amounts have been reclassified to conform to the March 31, 2019 presentation with no change to previously reported net income or total shareholders’ equity.

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- Definition The entire disclosure for all significant accounting policies of the reporting entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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