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Earnings Per Share Calculation | 3 Months Ended
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Jan. 31, 2020
Earnings Per Share [Abstract] |
Earnings Per Share Calculation | EARNINGS PER SHARE CALCULATION The following tables (in thousands except per share amounts) reconcile basic net income per common share (“Basic EPS”) and diluted net income per potential common share (“Diluted EPS”). Basic EPS is computed using the weighted average number of common shares outstanding. Diluted EPS is computed using the weighted average number of the following, in each case, to the extent the effect is not anti-dilutive: (i) common shares outstanding; (ii) shares issuable upon vesting of stock unit awards; and (iii) shares issuable under Ciena’s employee stock purchase plan and upon exercise of outstanding stock options, using the treasury stock method.
| Quarter Ended January 31,
Numerator | 2020 |  | 2019
Net income used to calculate Basic and Diluted EPS | $ | 62,328 |  |  | $ | 33,616 |
| Quarter Ended January 31,
Denominator | 2020 |  | 2019
Basic weighted average shares outstanding | 154,334 |  |  | 156,314 |
Add: Shares underlying outstanding stock options and stock unit awards and issuable under employee stock purchase plan | 1,404 |  |  | 1,860 |
Dilutive weighted average shares outstanding | 155,738 |  |  | 158,174 |
| Quarter Ended January 31,
EPS | 2020 |  | 2019
Basic EPS | $ | 0.40 |  |  | $ | 0.22 |
Diluted EPS | $ | 0.40 |  |  | $ | 0.21 |
The following table summarizes the weighted average shares excluded from the calculation of the denominator for Diluted EPS due to their anti-dilutive effect for the periods indicated (in thousands):
| Quarter Ended January 31,
| 2020 |  | 2019
Shares underlying stock options and stock unit awards | 731 |  |  | 401 |
Total shares excluded due to anti-dilutive effect | 731 |  |  | 401 |

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