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Capital Stock (Tables) | 9 Months Ended
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Sep. 30, 2019
Equity [Abstract] |
Capital Stock | The following is a schedule of changes in the number of common shares outstanding since the beginning of 2018:
|  | Nine Months Ended September 30, 2019 |  |  | Year Ended December 31, 2018 |
Beginning balance |  |  | 249,510,022 |  |  |  | 248,129,430 |
Restricted stock grants |  |  | 1,178,732 |  |  |  | 865,095 |
Restricted stock units vested |  |  | 714,271 |  |  |  | 434,046 |
Performance stock units issued |  |  | 12,283 |  |  |  | 73,985 |
Performance stock dividends |  |  | 464 |  |  |  | 2,164 |
Treasury shares issued |  |  | 1,532 |  |  |  | 5,302 |
Ending balance |  |  | 251,417,304 |  |  |  | 249,510,022 |

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- Definition Tabular disclosure of an entity's capital units or capital shares, including the value of capital units or capital shares, units authorized, units outstanding and other information necessary to a fair presentation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.16) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 + Details
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