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Earnings and Dividends Per Share | 6 Months Ended
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Jun. 30, 2017
Earnings Per Share [Abstract] |
Earnings Per Share | EARNINGS AND DIVIDENDS PER COMMON SHARE The weighted average number of common shares outstanding during the reporting period is used to calculate basic earnings per common share. Diluted earnings per common share assume the exercise of stock options and the conversion of our convertible debt using the treasury stock method, to the extent dilutive. If our average stock price for the period increases over the conversion price of our convertible debt, the conversion feature will be considered dilutive. The following table summarizes the average number of common shares and the net income used in the calculation of basic and diluted earnings per common share (in thousands, except share and per share amounts):
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Net income attributable to common stockholders | $ | 38,245 |  |  | $ | 44,595 |  |  | $ | 82,475 |  |  | $ | 77,320 |
BASIC: |  |  |  |  |  |  |
Weighted average common shares outstanding | 40,982,244 |  |  | 38,520,221 |  |  | 40,468,024 |  |  | 38,460,934 |
DILUTED: |  |  |  |  |  |  |
Weighted average common shares outstanding | 40,982,244 |  |  | 38,520,221 |  |  | 40,468,024 |  |  | 38,460,934 |
Stock options | 66,137 |  |  | 41,163 |  |  | 63,901 |  |  | 27,154 |
Convertible subordinated debentures | 196,792 |  |  | — |  |  | 147,420 |  |  | — |
Average dilutive common shares outstanding | 41,245,173 |  |  | 38,561,384 |  |  | 40,679,345 |  |  | 38,488,088 |
Net income per common share - basic | $ | .93 |  |  | $ | 1.16 |  |  | $ | 2.04 |  |  | $ | 2.01 |
Net income per common share - diluted | $ | .93 |  |  | $ | 1.16 |  |  | $ | 2.03 |  |  | $ | 2.01 |
Incremental shares excluded since anti-dilutive: |  |  |  |  |  |  |
Net share effect of stock options with an exercise price in excess of the average market price for our common shares | 11,015 |  |  | 14,940 |  |  | 9,736 |  |  | 41,773 |
Regular dividends declared per common share | $ | .95 |  |  | $ | .90 |  |  | $ | 1.90 |  |  | $ | 1.80 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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