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Capital Stock (Tables) | 6 Months Ended
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Jun. 30, 2015
Equity [Abstract] |
Capital Stock | The following is a schedule of changes in the number of common shares outstanding since the beginning of 2014:
|  | Six Months Ended June 30, 2015 |  |  | Year Ended December 31, 2014 |
Beginning balance |  |  | 168,628,177 |  |  |  | 163,342,894 |
Equity offering |  |  | — |  |  |  | 4,560,000 |
SARs exercised |  |  | 76,989 |  |  |  | 195,242 |
Restricted stock grants |  |  | 324,294 |  |  |  | 270,062 |
Restricted stock units vested |  |  | 243,601 |  |  |  | 244,413 |
Treasury shares issued |  |  | 20,443 |  |  |  | 15,566 |
Ending balance |  |  | 169,293,504 |  |  |  | 168,628,177 |

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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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