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Consolidated Statements of Income - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Consolidated Statements of Income      
Revenues $ 837,554 $ 868,267 $ 768,867
Costs of revenues 327,270 346,868 314,676
Gross profit 510,284 521,399 454,191
Operating expenses:      
Research and development 257,150 238,347 209,491
Selling, general and administrative 196,437 197,844 159,726
Operating expenses 453,587 436,191 369,217
Operating income 56,697 85,208 84,974
Other income (expense):      
Interest income and other, net 13,185 6,647 6,057
Interest expense (20,233) (19,694) (14,128)
Income before income taxes 49,649 72,161 76,903
Provision (benefit) for income taxes 30,384 (11,430) 29,811
Net income $ 19,265 $ 83,591 $ 47,092
Earnings per share:      
Basic (in dollars per share) $ 0.44 $ 1.94 $ 1.11
Diluted (in dollars per share) $ 0.43 $ 1.90 $ 1.09
Weighted-average common shares outstanding:      
Basic (in shares) 43,346 43,159 42,446
Diluted (in shares) 44,290 44,044 43,332