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DISCLOSURE OF CHANGES IN NUMBER OF SHARES - shares | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
Treasury stock | (3,968,188) |
Common Stock - Outstanding | 100,336,341 |
Common Stock |  |
Beginning balance | 104,238,159 | 104,058,684
Issuance of stock | 66,370 | 138,840
Balance at end of year | 104,304,529 | 104,197,524
Treasury stock | (3,968,188) | (2,171,107)
Common Stock - Outstanding | 100,336,341 | 102,026,417
Preferred Stock |  |
Balance at end of year | 2,006,391 | 2,006,391

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- Definition Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. + 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 210.5-02.29,30) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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