Fair Value (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Fair value of financial assets and liabilities

The fair value of financial assets and liabilities was determined using the following levels of inputs as of December 31, 2016 and January 2, 2016:

	Fair Value Measurements as of December 31, 2016:
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Cash equivalents:
Money market funds	$	237,724	$	237,724	$	—	$	—
Short-term investments:
Marketable equity securities	3,057		3,057		—		—
Trading securities held in NQDC trust	26,622		26,622		—		—
Total Assets	$	267,403	$	267,403	$	—	$	—
	Total		Level 1		Level 2		Level 3
	(In thousands)
Liabilities
Foreign currency exchange contracts	2,653		—		2,653		—

	Fair Value Measurements as of January 2, 2016:
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Cash equivalents:
Money market funds	$	360,691	$	360,691	$	—	$	—
Short-term investments:
Corporate debt securities	34,829		—		34,829		—
Bank certificates of deposit	15,046		—		15,046		—
United States Treasury securities	36,286		36,286		—		—
United States government agency securities	4,152		4,152		—		—
Commercial paper	1,993		—		1,993		—
Marketable equity securities	2,192		2,192		—		—
Trading securities held in NQDC trust	24,905		24,905		—		—
Total Assets	$	480,094	$	428,226	$	51,868	$	—
	Total		Level 1		Level 2		Level 3
	(In thousands)
Liabilities
Foreign currency exchange contracts	$	362	$	—	$	362	$	—