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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Schedule Of Assets And Liabilities Carried At Fair Value Measured On A Recurring Basis

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2018 and 2017 (in thousands):



	Assets at Fair Value as of December 31, 2018
Asset Category	Level 1				Level 2				Level 3				Total
Cash and cash equivalents ⁽¹⁾	$	363,907			$	—			$	—			$	363,907
Restricted cash ⁽²⁾	2,307				—				—				2,307
Deferred compensation plan assets ⁽³⁾	23,124				—				—				23,124
Total	$	389,338			$	—			$	—			$	389,338



	Assets at Fair Value as of December 31, 2017
Asset Category	Level 1				Level 2				Level 3				Total
Cash and cash equivalents ⁽¹⁾	$	467,430			$	—			$	—			$	467,430
Restricted cash ⁽²⁾	1,958				—				—				1,958
Deferred compensation plan assets ⁽³⁾	22,054				—				—				22,054
Total	$	491,442			$	—			$	—			$	491,442

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(1)	Cash and cash equivalents consist primarily of money market funds with original maturity dates of three months or less, which are Level 1 assets. At December 31, 2018 and 2017, we had $161.3 million and $194.2 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.