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Earnings Per Share | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share |
9. | EARNINGS PER SHARE
Below are the computations of basic and diluted earnings per share for the three and six months ended June 30, 2018 and 2017:
(In thousands, except per share amounts) |  | Three Months Ended June 30 |  |  | Six Months Ended June 30 |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Computation of Basic Earnings per Share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Stepan Company |  | $ | 32,925 |  |  | $ | 27,882 |  |  | $ | 63,648 |  |  | $ | 59,795 |
Weighted-average number of common shares outstanding |  |  | 23,039 |  |  |  | 22,953 |  |  |  | 23,059 |  |  |  | 22,927 |
Basic earnings per share |  | $ | 1.43 |  |  | $ | 1.21 |  |  | $ | 2.76 |  |  | $ | 2.61 |
Computation of Diluted Earnings per Share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Stepan Company |  | $ | 32,925 |  |  | $ | 27,882 |  |  | $ | 63,648 |  |  | $ | 59,795 |
Weighted-average number of shares outstanding |  |  | 23,039 |  |  |  | 22,953 |  |  |  | 23,059 |  |  |  | 22,927 |
Add weighted-average net shares from assumed exercise of options (under treasury stock method) (1) |  |  | 87 |  |  |  | 172 |  |  |  | 103 |  |  |  | 177 |
Add weighted-average net shares related to unvested stock awards (under treasury stock method) |  |  | 2 |  |  |  | 8 |  |  |  | 2 |  |  |  | 8 |
Add weighted-average net shares from assumed exercise of SARs (under treasury stock method) (1) |  |  | 99 |  |  |  | 143 |  |  |  | 111 |  |  |  | 143 |
Add weighted-average contingently issuable net shares related to performance stock awards (under treasury stock method) |  |  | 68 |  |  |  | 105 |  |  |  | 66 |  |  |  | 101 |
Weighted-average shares applicable to diluted earnings |  |  | 23,295 |  |  |  | 23,381 |  |  |  | 23,341 |  |  |  | 23,356 |
Diluted earnings per share |  | $ | 1.41 |  |  | $ | 1.19 |  |  | $ | 2.73 |  |  | $ | 2.56 |
(1) Options/SARs to acquire 194,949 and 98,878 shares of Company common stock were excluded from the computations of diluted earnings per share for the three- and six- months ended June 30, 2018, respectively. Options/SARs to acquire 37,261 shares of Company common stock were excluded from the computations of diluted earnings per share for the six months ended June 30, 2017. Inclusion of the instruments would have had antidilutive effects on the computations of the earnings per share.

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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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