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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) | 12 Months Ended
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Dec. 31, 2016 $ / shares shares | Dec. 31, 2015 $ / shares shares | Dec. 31, 2014 $ / shares shares
Consolidated Statements Of Changes In Shareholders' Equity [Abstract] |  |  |
Common stock dividends, per share | $ / shares | $ 1.09 | $ 1.01 | $ 0.905
Purchase of Treasury Stock, shares | 15,381 | 656 | 327
Net issuance to employee stock plans, including tax benefit, shares | 82,233 | 64,542 | 38,083

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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