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Capital Stock (Tables) | 9 Months Ended
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Sep. 30, 2016
Equity [Abstract] |
Capital Stock | The following is a schedule of changes in the number of common shares outstanding since the beginning of 2015:
|  | Nine Months Ended September 30, 2016 |  |  | Year Ended December 31, 2015 |
Beginning balance |  |  | 169,316,460 |  |  |  | 168,628,177 |
Memorial Merger |  |  | 77,042,749 |  |  |  | — |
SARs exercised |  |  | — |  |  |  | 77,002 |
Restricted stock grants |  |  | 464,428 |  |  |  | 335,103 |
Restricted stock units vested |  |  | 263,047 |  |  |  | 252,507 |
Shares retired |  |  | (739 | ) |  |  | — |
Treasury shares issued |  |  | 14,511 |  |  |  | 23,671 |
Ending balance |  |  | 247,100,456 |  |  |  | 169,316,460 |

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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://www.xbrl.org/2003/role/presentationRef -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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