The following tables summarize the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2021 and 2020 (in thousands):


	Assets at Fair Value as of December 31, 2021
Asset Category	Level 1		Level 2		Level 3		Total
Cash and cash equivalents (1)	$	821,345	$	—	$	—	$	821,345
Restricted cash (2)	1,223		—		—		1,223
Deferred compensation plan assets (3)	42,344		—		—		42,344
Total	$	864,912	$	—	$	—	$	864,912


	Assets at Fair Value as of December 31, 2020
Asset Category	Level 1		Level 2		Level 3		Total
Cash and cash equivalents (1)	$	902,867	$	—	$	—	$	902,867
Restricted cash (2)	695		—		—		695
Deferred compensation plan assets (3)	36,491		—		—		36,491
Total	$	940,053	$	—	$	—	$	940,053

(1)Cash and cash equivalents consist of deposit accounts and money market funds with original maturity dates of three months or less, which are Level 1 assets. At December 31, 2021 and 2020, we had $336.0 million and $482.2 million, respectively, in money market funds.

(2)Restricted cash is classified as “Prepaid expenses and other” in the Consolidated Balance Sheets. Restricted cash primarily represents cash held in account for use on customer contracts.

(3)Deferred compensation plan assets are classified as “Other assets” in the Consolidated Balance Sheets.