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Timberland Bancorp, inc. and Subsidiary Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares
6 Months Ended 12 Months Ended
Mar. 31, 2016
Sep. 30, 2015
Common Stock    
Common stock dividends (in dollars per share) $ 0.20 $ 0.11