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Condensed Statements of Shareholder's Equity Condensed Statements of Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares | 3 Months Ended | 9 Months Ended
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Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Mar. 31, 2019 | Mar. 31, 2018
Cash Dividends per Common Share | $ 0.31 | $ 0.30 | $ 0.30 | $ 0.30 | $ 0.29 | $ 0.29 | $ 0.91 | $ 0.88

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration