Condensed Consolidated Statements of Operations Condensed Consolidated Statement of Operations - USD ($) shares in Thousands	3 Months Ended	9 Months Ended
Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Income Statement [Abstract]
Product revenue	$ 307,414,000	$ 278,112,000	$ 911,575,000	$ 848,690,000
Cost of goods sold	103,750,000	99,186,000	318,124,000	292,551,000
Gross profit	203,664,000	178,926,000	593,451,000	556,139,000
Selling, general and administrative	100,647,000	90,376,000	291,180,000	278,714,000
Research and development	35,406,000	28,852,000	103,860,000	86,971,000
Litigation awards	0	0	0	(474,000)
Total operating expenses	136,053,000	119,228,000	395,040,000	365,211,000
Operating income	67,611,000	59,698,000	198,411,000	190,928,000
Non-operating (loss) income	(78,000)	1,357,000	(735,000)	6,108,000
Income before provision for income taxes	67,533,000	61,055,000	197,676,000	197,036,000
Provision for income taxes	9,762,000	11,650,000	36,287,000	27,403,000
Net income	$ 57,771,000	$ 49,405,000	$ 161,389,000	$ 169,633,000
Basic	$ 1.05	$ 0.90	$ 2.93	$ 3.11
Diluted	$ 1.00	$ 0.85	$ 2.80	$ 2.92
Basic	55,143	54,997	55,125	54,543
Diluted	57,664	58,280	57,651	58,033

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227