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Net income (loss) per share | 6 Months Ended
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Jun. 30, 2020
Net income (loss) per share |
Net income (loss) per share | 15. Net income (loss) per share Net income (loss) per share was calculated as follows for the periods indicated below:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ | Six Months Ended
​ |  | June 30, |  | June 30,
(in thousands, except per share data) |  |  | 2020 |  | 2019 |  |  | 2020 |  | 2019
Basic Net Income (Loss) Per Share | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic net income (loss) per share | ​ | $ | 290,298 | ​ | $ | 105,318 | ​ | $ | (430,344) | ​ | $ | 207,630
Weighted average common shares outstanding | ​ | ​ | 217,549 | ​ | ​ | 214,620 | ​ | ​ | 217,135 | ​ | ​ | 214,342
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic net income (loss) per share | ​ | $ | 1.33 | ​ | $ | 0.49 | ​ | $ | (1.98) | ​ | $ | 0.97
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted Net Income (Loss) Per Share | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted net income (loss) | ​ | $ | 290,298 | ​ | $ | 105,318 | ​ | $ | (430,344) | ​ | $ | 207,630
Weighted average common shares outstanding | ​ | ​ | 217,549 | ​ | ​ | 214,620 | ​ | ​ | 217,135 | ​ | ​ | 214,342
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Dilutive stock options and awards | ​ | ​ | 2,885 | ​ | ​ | 2,863 | ​ | ​ | — | ​ | ​ | 2,932
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average shares used to compute diluted net income (loss) per share | ​ | ​ | 220,434 | ​ | ​ | 217,483 | ​ | ​ | 217,135 | ​ | ​ | 217,274
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted net income (loss) per share | ​ | $ | 1.32 | ​ | $ | 0.48 | ​ | $ | (1.98) | ​ | $ | 0.96
​ The potential common shares that were excluded from the diluted net income (loss) per share computation are as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended | ​
​ | ​ | June 30, | ​ | June 30, | ​
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 |
Outstanding stock options and awards |  | 4,970,884 | ​ | 9,165,776 | ​ | 14,598,523 | ​ | 9,221,941 |
Common shares issuable upon conversion of the 2020 Notes |  | 365,752 | ​ | 368,939 | ​ | 365,752 | ​ | 368,939 |
Total potential common shares excluded from diluted net income (loss) per share computation |  | 5,336,636 |  | 9,534,715 |  | 14,964,275 |  | 9,590,880 |
​

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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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