Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Measurements [Abstract]

Schedule Of Fair Value Of Assets And Liabilities Measured On Recurring Basis

	Quoted Prices		Significant
	in Active		Other		Significant
	Markets for		Observable		Unobservable
	Identical Assets		Inputs		Inputs		Balance at
As of December 31, 2015	(Level 1)		(Level 2)		(Level 3)		December 31, 2015
Assets
Money market funds(1)	$	15,490	$	-	$	-	$	15,490
Agency bonds		-		1,999		-		1,999
Commercial paper		-		1,800		-		1,800
Marketable securities
Corporate bonds		-		177,613		-		177,613
U.S. government bonds		-		12,871		-		12,871
Agency bonds		-		12,065		-		12,065
Certificates of deposit		-		3,500		-		3,500
Commercial paper		-		3,491		-		3,491
International government bonds		-		1,459		-		1,459
Municipal bonds		-		1,399		-		1,399
Treasury bills		-		1,193		-		1,193
Total marketable securities		-		213,591		-		213,591
Equity mutual funds(2)		2,264		-		-		2,264
Foreign currency exchange contracts(3)		-		4,876		-		4,876
Liabilities
Foreign currency exchange contracts(3)		-		1,365		-		1,365
Deferred compensation(4)		2,264		-		-		2,264
Interest rate swaps(5)		-		384		-		384

	Quoted Prices		Significant
	in Active		Other		Significant
	Markets for		Observable		Unobservable
	Identical Assets		Inputs		Inputs		Balance at
As of December 31, 2014	(Level 1)		(Level 2)		(Level 3)		December 31, 2014
Assets
Money market funds(1)	$	204,743	$	-	$	-	$	204,743
Equity mutual funds(2)		2,654		-		-		2,654
Foreign currency exchange contracts(3)		-		12,226		-		12,226
Liabilities
Foreign currency exchange contracts(3)		-		1,323		-		1,323
Deferred compensation(4)		2,654		-		-		2,654
Interest rate swaps(5)		-		1,117		-		1,117

__________

(1) Money market funds, agency bonds and commercial paper with an original maturity of less than ninety days are included within cash and cash equivalents. The remaining balance of cash and cash equivalents as of December 31, 2015 and December 31, 2014 consisted of demand deposits.  Commercial paper with an original maturity of over ninety days is included within marketable securities.

(2) Equity mutual funds relate to a deferred compensation plan that was assumed as part of a previous business combination. This amount is included within other long-term assets, net. See number (4) below for a discussion of the related deferred compensation liability.

(3) Foreign currency exchange contracts are included within other current assets, net; other long-term assets, net; accrued liabilities; or other long-term liabilities depending on the gain (loss) position and anticipated settlement date.  

(4) A deferred compensation plan assumed as part of a previous business combination is included within other long-term liabilities. The fair value of our deferred compensation plan is indexed to the performance of the underlying equity mutual funds discussed in number (2) above.

(5) Interest rate swaps are included within accrued liabilities.