Cash and Cash Equivalents, and Investments (Tables)

12 Months Ended

Dec. 31, 2020

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents, and Investments

The following tables show our cash and cash equivalents, and investments’ adjusted cost, unrealized gain, unrealized loss and fair value as of December 31, 2020 and 2019 (in thousands):


	December 31, 2020
	Adjusted Cost		Unrealized Gain		Unrealized Loss		Fair Value
Cash and cash equivalents:
Cash	$	15,054	$	—	$	—	$	15,054

Money market funds	464,799		—		—		464,799
Total cash and cash equivalents	$	479,853	$	—	$	—	$	479,853
Short-term investments:
Commercial paper	$	204,152	$	24	$	(6)	$	204,170
Corporate debt securities	459,967		1,478		(48)		461,397
Total short-term investments	$	664,119	$	1,502	$	(54)	$	665,567
Long-term investments
Corporate debt securities	$	484,275	$	605	$	(283)	$	484,597
Agency bonds	38,995		36		—		39,031
Total long-term investments	$	523,270	$	641	$	(283)	$	523,628


	December 31, 2019
	Adjusted Cost		Unrealized Gain		Unrealized Loss		Fair Value
Cash and cash equivalents:
Cash	$	241,355	$	—	$	—	$	241,355
Money market funds	146,165		—		—		146,165



Total cash and cash equivalents	$	387,520	$	—	$	—	$	387,520
Short-term investments:
Commercial paper	$	7,489	$	—	$	—	$	7,489
Corporate debt securities	318,946		425		(78)		319,293
U.S. treasury securities	44,251		39		(4)		44,286
Agency bonds	10,000		6		—		10,006
Total short-term investments	$	380,686	$	470	$	(82)	$	381,074
Long-term investments
Corporate securities	$	295,103	$	533	$	(158)	$	295,478
Agency bonds	14,999		6		—		15,005
Total long-term investments	$	310,102	$	539	$	(158)	$	310,483

Schedule of Available-for-sale Securities Reconciliation

The adjusted cost and fair value of our cash equivalents and investments as of December 31, 2020 by contractual maturity were as follows (in thousands):


	December 31, 2020
	Cost		Fair Value
Due in 1 year or less	$	664,119	$	665,567
Due in 1-2 years	523,270		523,628
Investments not due at a single maturity date	464,799		464,799
Total	$	1,652,188	$	1,653,994