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Earnings Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2016
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares | The table below reconciles the weighted-average basic and diluted common shares outstanding:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
Weighted average number of common shares outstanding - basic | 72,839,000 |  |  | 72,009,000 |  |  | 72,718,000 |  |  | 71,714,000 |
Effect of dilutive securities (1) | 753,000 |  |  | 682,000 |  |  | 717,000 |  |  | 667,000 |
Weighted average number of common shares outstanding - diluted | 73,592,000 |  |  | 72,691,000 |  |  | 73,435,000 |  |  | 72,381,000 |
(1) | Certain outstanding stock option awards are anti-dilutive and were therefore excluded from the calculation of the weighted average number of diluted common shares outstanding. During the three and nine months ended September 30, 2016, options to purchase 501,000 and 544,000 shares having a weighted average exercise price of $34.14 were excluded. During the three and nine months ended September 30, 2015, options to purchase 597,000 and 925,000 shares having weighted average exercise prices of $30.03 and $29.33, respectively, were excluded.

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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