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Consolidated Statements of Stockholders' Equity Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Statement of Stockholders' Equity [Abstract] |  |  |
Preferred Stock, Shares Authorized | 2,000,000 | 2,000,000 |
Preferred Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 |
Shares Held In Trust For Deferred Compensation Plan | 97,053 | 90,961 | 76,745
Dividends Declared | $ 1.4350 | $ 1.2800 | $ 1.2025
Shares Issued Under Performance Incentive Plan Withheld For Employee Taxes | 10,436 | 10,269 | 12,031

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- Definition Aggregate dividends declared 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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