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Earnings and Dividends Per Share | 12 Months Ended
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Dec. 31, 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 vesting of restricted shares using the treasury stock method, to the extent dilutive. Dilution resulting from the conversion option within our convertible debt is determined by computing an average of incremental shares included in each quarterly diluted EPS computation. If NHI’s current share price increases above the adjusted conversion price, further dilution will be attributable to the conversion feature. 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):
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Net income attributable to common stockholders | $ | 159,365 |  |  | $ | 151,540 |  |  | $ | 148,862 |
BASIC: |  |  |  |  |
Weighted average common shares outstanding | 40,894,219 |  |  | 39,013,412 |  |  | 37,604,594 |
DILUTED: |  |  |  |  |
Weighted average common shares outstanding | 40,894,219 |  |  | 39,013,412 |  |  | 37,604,594 |
Stock options and restricted shares | 67,703 |  |  | 52,497 |  |  | 34,842 |
Convertible senior notes - unsecured | 189,531 |  |  | 89,471 |  |  | 4,735 |
Average dilutive common shares outstanding | 41,151,453 |  |  | 39,155,380 |  |  | 37,644,171 |
Net income per common share - basic | $ | 3.90 |  |  | $ | 3.88 |  |  | $ | 3.96 |
Net income per common share - diluted | $ | 3.87 |  |  | $ | 3.87 |  |  | $ | 3.95 |
Net share effect of anti-dilutive stock options | 573 |  |  | 6,366 |  |  | 51,603 |
Regular dividends declared per common share | $ | 3.80 |  |  | $ | 3.60 |  |  | $ | 3.40 |

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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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