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Condensed Consolidated Statements of Income (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 25, 2021
Sep. 26, 2020
Sep. 25, 2021
Sep. 26, 2020
Income Statement [Abstract]        
Net sales $ 1,191,973 $ 1,109,194 $ 3,591,206 $ 2,835,168
Cost of goods sold 496,026 441,211 1,472,852 1,144,816
Gross profit 695,947 667,983 2,118,354 1,690,352
Advertising expense 36,705 33,866 110,705 90,031
Selling, general and administrative expenses 162,515 142,134 485,896 411,335
Research and development expense 214,057 174,882 618,253 506,013
Total operating expense 413,277 350,882 1,214,854 1,007,379
Operating income 282,670 317,101 903,500 682,973
Other income (expense):        
Interest income 6,897 7,777 21,568 30,258
Foreign currency (losses) gains (15,014) 10,113 (30,621) (9,802)
Other income 833 1,726 3,511 8,515
Total other income (expense) (7,284) 19,616 (5,542) 28,971
Income before income taxes 275,386 336,717 897,958 711,944
Income tax provision 16,347 23,300 101,894 53,168
Net income $ 259,039 $ 313,417 $ 796,064 $ 658,776
Net income per share:        
Basic $ 1.35 $ 1.64 $ 4.14 $ 3.45
Diluted $ 1.34 $ 1.63 $ 4.13 $ 3.44
Weighted average common shares outstanding:        
Basic 192,322 191,234 192,123 191,021
Diluted 193,185 191,998 192,955 191,760