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Consolidated Condensed Statements Of Changes In Stockholders' Equity (Parenthetical) - $ / shares | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Statement of Stockholders' Equity [Abstract] |  |
Cash dividends on common stock per share | $ 2.15 | $ 1.88
Treasury Stock, Shares, Acquired | 50,000 | 50,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross | 18,800 | 9,674

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- Definition Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: 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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