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CONSOLIDATED STATEMENTS OF OPERATIONS Statement - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 29, 2018
Sep. 29, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 30, 2017
Sep. 30, 2017
Jul. 01, 2017
Apr. 01, 2017
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Income Statement [Abstract]                      
Product                 $ 829,874 $ 738,242 $ 673,962
Royalty and other revenue                 28,415 52,006 38,936
Total revenue $ 223,132 $ 210,583 $ 211,621 $ 212,953 $ 207,939 $ 193,360 $ 192,306 $ 196,643 858,289 790,248 712,898
Cost of goods sold                 283,397 268,216 234,560
Gross profit 148,331 140,753 142,147 143,661 138,652 124,065 126,901 132,414 574,892 522,032 478,338
Selling, general and administrative                 289,456 276,292 254,707
Research and development                 76,967 61,953 57,686
Litigation settlement, award and/or defense costs                 425 0 (270,000)
Total operating expenses                 366,848 338,245 42,393
Operating income $ 53,906 $ 48,641 $ 51,612 $ 53,885 $ 44,726 $ 43,061 $ 43,849 $ 52,151 208,044 183,787 435,945
Non-operating (income) expense                 (5,732) (2,013) 2,429
Income before provision for income taxes                 213,776 185,800 433,516
Provision for income taxes                 20,233 61,011 122,419
Net income                 $ 193,543 $ 124,789 $ 311,097
Basic $ 0.88 $ 1.09 $ 0.84 $ 0.88 $ (0.15) $ 0.69 $ 0.87 $ 1.02 $ 3.70 $ 2.42 $ 6.28
Diluted $ 0.83 $ 1.02 $ 0.79 $ 0.82 $ (0.15) $ 0.64 $ 0.80 $ 0.93 $ 3.45 $ 2.23 $ 5.85
Basic                 52,296 51,516 49,530
Diluted                 56,039 55,874 53,195