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Equity - Reincorporation, Common Stock (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2019 $ / shares | Feb. 28, 2018 $ / shares | Feb. 28, 2017 $ / shares | Jul. 31, 2016 $ / shares | Feb. 28, 2015 $ / shares | Dec. 31, 2018 item $ / shares | Dec. 31, 2017 $ / shares | Dec. 31, 2016 $ / shares
Common Stock |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) |  |  |  |  |  | $ 0.001 | $ 0.001 |
Common stock, par value (in dollars per share) |  |  |  |  |  | $ 0.001 | 0.001 |
The number of consecutive years the company has paid regular common stock quarterly dividends. | item |  |  |  |  |  | 59 |  |
Votes per share of common stock | item |  |  |  |  |  | 1 |  |
Common stock quarterly dividend per share (in dollars per share) | $ 0.55 | $ 0.50 | $ 0.45 | $ 0.425 | $ 0.40 | $ 2.00 | $ 1.80 | $ 1.65

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- Definition The number of votes per share of common stock on all matters except the election of members to the Board of Directors. + References No definition available. + Details
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- Definition The number of consecutive years the company has paid regular common stock quarterly dividends. + References No definition available. + Details
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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 Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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