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Stockholders' Equity Matters (Tables) | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Schedule of dividend declared and payments | In fiscal year 2017 and in the first six months of 2018, our board of directors declared the following dividends:
Declaration Date |  | Dividend Per Share |  | Record Date |  | Total Amount |  | Payment Date
February 15, 2017 |  | $ | 0.5500 |  |  | March 15, 2017 |  | $ | 145,235 |  |  | April 3, 2017
May 24, 2017 |  | 0.5500 |  |  | June 15, 2017 |  | 145,417 |  |  | July 3, 2017
July 27, 2017 |  | 0.5500 |  |  | September 15, 2017 |  | 146,772 |  |  | October 2, 2017
October 24, 2017 |  | 0.5875 |  |  | December 15, 2017 |  | 166,319 |  |  | January 2, 2018
February 14, 2018 |  | 0.5875 |  |  | March 15, 2018 |  | 167,969 |  |  | April 2, 2018
May 24, 2018 |  | 0.5875 |  |  | June 15, 2018 |  | 168,078 |  |  | July 2, 2018

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- Definition Tabular disclosure of all or some of the information related to dividends declared, but not paid, as of the financial reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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