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Fair Value Measurements (Tables)

3 Months Ended

Mar. 29, 2019

Fair Value Disclosures [Abstract]

Classification of Financial Assets Measured and Recorded at Fair Value on a Recurring Basis

The classification within the fair value hierarchy of our financial assets that were measured and recorded at fair value on a recurring basis was as follows (in thousands):

	March 31, 2019
	Level 1				Level 2				Total
Money market funds	$	75,171			$	—			$	75,171
Commercial paper	—				414,317				414,317
Corporate bonds	—				418,385				418,385
U.S. Treasury and government sponsored enterprises	—				84,487				84,487
Total investments available-for-sale	75,171				917,189				992,360
Certificates of deposit	—				25,990				25,990
Total financial assets carried at fair value	$	75,171			$	943,179			$	1,018,350

	December 31, 2018
	Level 1				Level 2				Total
Money market funds	$	47,744			$	—			$	47,744
Commercial paper	—				381,133				381,133
Corporate bonds	—				344,064				344,064
U.S. Treasury and government sponsored enterprises	—				55,201				55,201
Total investments available-for-sale	47,744				780,398				828,142
Certificates of deposit	—				16,596				16,596
Total financial assets carried at fair value	$	47,744			$	796,994			$	844,738

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- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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- References

No definition available.

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