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CONSOLIDATED STATEMENTS OF OPERATIONS CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands
 12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Income Statement [Abstract]      
Product $ 1,143,744,000 $ 936,408,000 $ 829,874,000
Royalty and other revenue 0 1,429,000 28,415,000
Total revenue 1,143,744,000 937,837,000 858,289,000
Cost of goods sold 400,679,000 308,665,000 283,397,000
Gross profit 743,065,000 629,172,000 574,892,000
Selling, general and administrative 369,057,000 314,661,000 285,417,000
Research and development 118,659,000 93,295,000 81,006,000
Litigation awards, settlements/or defense costs (474,000) 0 425,000
Total operating expenses 487,242,000 407,956,000 366,848,000
Operating income 255,823,000 221,216,000 208,044,000
Non-operating income 7,913,000 12,950,000 5,732,000
Income before provision for income taxes 263,736,000 234,166,000 213,776,000
Provision for income taxes 23,454,000 37,950,000 20,233,000
Net income including noncontrolling interest 240,282,000 196,216,000 193,543,000
Comprehensive loss attributable to noncontrolling interest (20,000) 0 0
Net Income (Loss) Attributable to Parent $ 240,302,000 $ 196,216,000 $ 193,543,000
Basic $ 4.39 $ 3.67 $ 3.70
Diluted $ 4.14 $ 3.44 $ 3.45
Basic 54,700 53,434 52,296
Diluted 58,037 57,100 56,039