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Net Income Per Share
 9 Months Ended
Sep. 26, 2020
Earnings Per Share [Abstract]  
NET INCOME PER SHARE NET INCOME PER SHARE
Basic net income per share is computed by dividing net income during the period by the weighted-average number of shares of common stock outstanding during that period, less unvested restricted stock awards. Diluted net income per share is impacted by equity instruments considered to be potential common shares, if dilutive, computed using the treasury stock method of accounting.
The calculations for basic and diluted net income per share for the three and nine months ended September 26, 2020 and September 28, 2019 are as follows:
 Three Months Ended Nine Months Ended
 September 26,
2020		September 28,
2019		September 26,
2020		September 28,
2019
 (In thousands, except per share amounts)
Net income$161,630 $101,514 $416,906 $329,304 
Weighted average common shares used to calculate basic net income per share273,996 273,329 273,633 273,224 
Stock-based awards6,028 7,337 5,822 7,593 
Weighted average common shares used to calculate diluted net income per share280,024 280,666 279,455 280,817 
Net income per share - basic$0.59 $0.37 $1.52 $1.21 
Net income per share - diluted$0.58 $0.36 $1.49 $1.17 
The following table presents shares of Cadence’s common stock outstanding for the three and nine months ended September 26, 2020 and September 28, 2019 that were excluded from the computation of diluted net income per share because the effect of including these shares in the computation of diluted net income per share would have been anti-dilutive:
 Three Months Ended Nine Months Ended
 September 26,
2020		September 28,
2019		September 26,
2020		September 28,
2019
 (In thousands)
Long-term performance-based stock awards105 1,386 510 279 
Options to purchase shares of common stock23 — 258 476 
Non-vested shares of restricted stock21 1,276 75 1,000 
Total potential common shares excluded149 2,662 843 1,755