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Consolidated Condensed Statements Of Changes In Stockholders' Equity (Parenthetical) - $ / shares | 3 Months Ended | 12 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Statement of Stockholders' Equity [Abstract] |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 1.22 | $ 1.21 |
Stock Issued During Period, Shares, Acquisitions | 0 | 0 | 1,037,205
Treasury Stock, Shares, Acquired | 76,000 | 86,650 |
Stock Issued During Period, Shares, Restricted Stock Award, Gross | 25,028 | 27,719 |

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