Stock Compensation Plans and Stock Based Compensation (Details 9) - Employee stock purchase plans [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Shares of common stock issued under employee stock purchase plan
Cadence shares purchased under the ESPP	785	988	892
Cash received for the purchase of shares under the ESPP	$ 48,328	$ 38,290	$ 29,160
Weighted-average purchase price per share	$ 61.55	$ 38.74	$ 32.69

Cash received for the purchase of shares under the ESPP.

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- Definition

Shares of common stock issued under employee stock purchase plan.

+ References

No definition available.

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- Definition

Per share weighted-average price paid for shares purchased on open market for issuance under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

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- Definition

Number of shares purchased for issuance under share-based payment arrangement.

+ References

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