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Employee Benefit Plans (Schedule of Stock Option Activity) (Details) - Stock Options shares in Thousands	9 Months Ended
	Sep. 29, 2019 $ / shares shares
Number of shares
Beginning balance (in shares) | shares	7,209
Granted (in shares) | shares	10
Exercised (in shares) | shares	(4)
Cancelled (in shares) | shares	(938)
Expired (in shares) | shares	(159)
Ending balance (in shares) | shares	6,118
Weighted Average Exercise Price Per Share
Beginning balance (in dollars per share) | $ / shares	$ 12.08
Granted (in dollars per share) | $ / shares	3.90
Exercised (in dollars per share) | $ / shares	3.03
Cancelled (in dollars per share) | $ / shares	15.88
Expired (in dollars per share) | $ / shares	12.00
Ending balance (in dollars per share) | $ / shares	$ 11.49
NETGEAR
Number of shares
Beginning balance (in shares) | shares	283
Exercised (in shares) | shares	(48)
Cancelled (in shares) | shares	(16)
Expired (in shares) | shares	(14)
Ending balance (in shares) | shares	205
Weighted Average Exercise Price Per Share
Beginning balance (in dollars per share) | $ / shares	$ 26.53
Exercised (in dollars per share) | $ / shares	21.35
Cancelled (in dollars per share) | $ / shares	36.27
Expired (in dollars per share) | $ / shares	41.67
Ending balance (in dollars per share) | $ / shares	$ 25.94

X

- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(4)
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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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