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Net income per share | 9 Months Ended
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Sep. 30, 2019
Net income per share |
Net income per share | 15. Net income per share Net income per share was calculated as follows for the periods indicated below:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ | Nine Months Ended
​ |  | September 30, |  | September 30,
(in thousands, except per share data) |  |  | 2019 |  | 2018 |  |  | 2019 |  | 2018
Basic Net Income Per Share | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic net income | ​ | $ | 128,271 | ​ | $ | 29,176 | ​ | $ | 335,901 | ​ | $ | 40,430
Weighted average common shares outstanding | ​ | ​ | 215,199 | ​ | ​ | 212,627 | ​ | ​ | 214,628 | ​ | ​ | 212,172
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic net income per share | ​ | $ | 0.60 | ​ | $ | 0.14 | ​ | $ | 1.57 | ​ | $ | 0.19
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted Net Income Per Share | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted net income | ​ | $ | 128,271 | ​ | $ | 29,176 | ​ | $ | 335,901 | ​ | $ | 40,430
Weighted average common shares outstanding | ​ | ​ | 215,199 | ​ | ​ | 212,627 | ​ | ​ | 214,628 | ​ | ​ | 212,172
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Dilutive stock options and awards | ​ | ​ | 2,592 | ​ | ​ | 3,337 | ​ | ​ | 2,765 | ​ | ​ | 3,344
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average shares used to compute diluted net income per share | ​ | ​ | 217,791 | ​ | ​ | 215,964 | ​ | ​ | 217,393 | ​ | ​ | 215,516
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted net income per share | ​ | $ | 0.59 | ​ | $ | 0.14 | ​ | $ | 1.55 | ​ | $ | 0.19
​ The following potential common shares were excluded from the calculations as their effect would be anti-dilutive:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended | ​
​ | ​ | September 30, | ​ | September 30, | ​
​ |  | 2019 |  | 2018 |  | 2019 |  | 2018 |
Outstanding stock options and awards |  | 8,893,596 | ​ | 9,055,004 | ​ | 9,457,441 | ​ | 7,254,774 |
Common shares issuable upon conversion of the 2018 Notes |  | — | ​ | 148,741 | ​ | — | ​ | 148,741 |
Common shares issuable upon conversion of the 2020 Notes |  | 368,939 | ​ | 368,939 | ​ | 368,939 | ​ | 368,939 |
Total potential common shares excluded from diluted net income (loss) per share computation |  | 9,262,535 |  | 9,572,684 |  | 9,826,380 |  | 7,772,454 |
​

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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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