Cash, Cash Equivalents and Marketable Securities

12 Months Ended

Dec. 31, 2021

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents, and Marketable Securities

Cash, Cash Equivalents and Marketable Securities

Cash, cash equivalents and marketable securities consist of the following (in thousands):

	December 31, 2021
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Cash and cash equivalents:
Cash	$	589,156	$	—	$	—	$	589,156
Money market funds	711,188		—		—		711,188
Commercial paper	114,972		4		—		114,976
Corporate bonds	4,310		—		—		4,310
Total cash and cash equivalents	1,419,626		4		—		1,419,630
Marketable securities:
Corporate bonds	450,746		181		(1,510)		449,417
Commercial paper	247,623		15		(78)		247,560
U.S. treasury securities	189,325		19		(334)		189,010
Certificates of deposit	82,504		19		(37)		82,486
Municipal securities	49,470		11		(150)		49,331
Non-U.S. government and supranational bonds	41,812		3		(131)		41,684
U.S. agency bonds	1,000		—		—		1,000
Total marketable securities	1,062,480		248		(2,240)		1,060,488
Total	$	2,482,106	$	252	$	(2,240)	$	2,480,118

	December 31, 2020
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Cash and cash equivalents:
Cash	$	352,061	$	—	$	—	$	352,061
Money market funds	225,643		—		—		225,643
Commercial paper	48,530		2		—		48,532
U.S. treasury securities	39,997		1		—		39,998
Certificates of deposit	2,996		—		—		2,996
Total cash and cash equivalents	669,227		3		—		669,230
Marketable securities:
Corporate bonds	452,723		1,782		(18)		454,487
U.S. treasury securities	202,795		260		(1)		203,054
Commercial paper	234,170		86		(3)		234,253
Certificates of deposit	134,828		57		(3)		134,882
Municipal securities	17,604		22		(7)		17,619
U.S. agency bonds	16,012		6		—		16,018
Non-U.S. government and supranational bonds	15,938		13		(1)		15,950
Asset-backed securities	14,752		61		—		14,813
Total marketable securities	1,088,822		2,287		(33)		1,091,076
Total	$	1,758,049	$	2,290	$	(33)	$	1,760,306

Our allowance for credit losses for our marketable securities was not material as of December 31, 2021 and 2020.

The fair value of our marketable securities by contractual maturity is as follows (in thousands):

	December 31, 2021
Due in one year or less	$	716,132
Due after one to five years	344,356
Total	$	1,060,488

Net realized gains and losses from sales of available-for-sale securities were not material for any period presented.