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Fair Value Measurements (Tables)

3 Months Ended

Mar. 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 March 31, 2018 and December 31, 2017 (in thousands):



	Assets at Fair Value as of March 31, 2018
Asset Category	Level 1				Level 2				Level 3				Total
Cash and cash equivalents ⁽¹⁾	$	352,443			$	—			$	—			$	352,443
Restricted cash ⁽²⁾	2,461				—				—				2,461
Deferred compensation plan assets ⁽³⁾	25,966				—				—				25,966
Total	$	380,870			$	—			$	—			$	380,870



	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 include money market funds with original maturity dates of three months or less, which are Level 1 assets. At March 31, 2018 and December 31, 2017, we had $178.0 million and $194.2 million, respectively, in money market funds.


(2)	Restricted cash is classified as “Prepaid expenses and other” in the Condensed 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 Condensed Consolidated Balance Sheets.