Fair Value Measurements and Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following tables show, by level within the fair value hierarchy, our financial assets and liabilities that are accounted for at fair value on a recurring basis at March 31, 2016 and December 31, 2015. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect its placement within the fair value hierarchy.

	March 31, 2016
	Level 1		Level 2			Level 3		Total
Assets:
Investment securities
Money market funds / commercial paper	$	20,453	$	181,894		$	—	$	202,347
Equity securities	—		22,413			—		22,413
Commingled fixed income securities	—		23,811			—		23,811
Debt securities - U.S. and foreign governments, agencies and municipalities	120,388		12,537			—		132,925
Debt securities - corporate	—		62,671			—		62,671
Mortgage-backed / asset-backed securities	—		165,354			—		165,354
Derivatives
Foreign exchange contracts	—		145			—		145
Total assets	$	140,841	$	468,825		$	—	$	609,666
Liabilities:
Derivatives
Foreign exchange contracts	$	—	$	(5,507	)	$	—	$	(5,507	)
Total liabilities	$	—	$	(5,507	)	$	—	$	(5,507	)

	December 31, 2015
	Level 1		Level 2			Level 3		Total
Assets:
Investment securities
Money market funds / commercial paper	$	41,215	$	292,412		$	—	$	333,627
Equity securities	—		24,538			—		24,538
Commingled fixed income securities	—		22,571			—		22,571
Debt securities - U.S. and foreign governments, agencies and municipalities	102,235		12,566			—		114,801
Debt securities - corporate	—		62,884			—		62,884
Mortgage-backed / asset-backed securities	—		178,234			—		178,234
Derivatives
Foreign exchange contracts	—		1,716			—		1,716
Total assets	$	143,450	$	594,921		$	—	$	738,371
Liabilities:
Derivatives
Foreign exchange contracts	$	—	$	(5,387	)	$	—	$	(5,387	)
Total liabilities	$	—	$	(5,387	)	$	—	$	(5,387	)

Schedule of Available-for-sale Securities Reconciliation

Available-for-sale securities at March 31, 2016 and December 31, 2015 consisted of the following:

	March 31, 2016
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Estimated fair value
U.S. and foreign governments, agencies and municipalities	$	129,918	$	3,328	$	(321	)	$	132,925
Corporate notes and bonds	61,181		1,869		(379		)	62,671
Commingled fixed income securities	1,542		14		—			1,556
Mortgage-backed / asset-backed securities	163,491		3,024		(1,161		)	165,354
Total	$	356,132	$	8,235	$	(1,861	)	$	362,506

	December 31, 2015
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Estimated fair value
U.S. and foreign governments, agencies and municipalities	$	114,265	$	1,804	$	(1,268	)	$	114,801
Corporate notes and bonds	63,140		823		(1,079		)	62,884
Mortgage-backed / asset-backed securities	177,821		1,901		(1,488		)	178,234
Total	$	355,226	$	4,528	$	(3,835	)	$	355,919

Available-for-sale Securities

Scheduled maturities of available-for-sale securities at March 31, 2016 were as follows:

	Amortized cost		Estimated fair value
Within 1 year	$	64,649	$	64,711
After 1 year through 5 years	78,466		79,906
After 5 years through 10 years	52,093		53,610
After 10 years	160,924		164,279
Total	$	356,132	$	362,506

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The fair value of derivative instruments at March 31, 2016 and December 31, 2015 was as follows:

Designation of Derivatives	Balance Sheet Location	March 31, 2016			December 31, 2015
Derivatives designated as hedging instruments
Foreign exchange contracts	Other current assets and prepayments	$	122		$	217
	Accounts payable and accrued liabilities:	(661		)	(208		)
Derivatives not designated as hedging instruments
Foreign exchange contracts	Other current assets and prepayments	23			1,499
	Accounts payable and accrued liabilities:	(4,846		)	(5,179		)
	Total derivative assets	$	145		$	1,716
	Total derivative liabilities	(5,507		)	(5,387		)
	Total net derivative liabilities	$	(5,362	)	$	(3,671	)

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location

The following represents the results of cash flow hedging relationships for the three months ended March 31,2016 and 2015:

	Three Months Ended March 31,
	Derivative Gain (Loss) Recognized in AOCL (Effective Portion)						Location of Gain (Loss) (Effective Portion)	Gain (Loss) Reclassified from AOCL to Earnings (Effective Portion)
Derivative Instrument	2016			2015				2016			2015
Foreign exchange contracts	$	(393	)	$	(409	)	Revenue	$	(380	)	$	(396	)
							Cost of sales	225			(395		)
								$	(155	)	$	(791	)

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location

The following represents the results of our non-designated derivative instruments for the three months ended March 31,2016 and 2015:

		Three Months Ended March 31,
		Derivative Gain (Loss) Recognized in Earnings
Derivatives Instrument	Location of Derivative Gain (Loss)	2016			2015
Foreign exchange contracts	Selling, general and administrative expense	$	(5,977	)	$	(208	)

Fair Value, by Balance Sheet Grouping

The carrying value and estimated fair value of our debt at March 31, 2016 and December 31, 2015 were as follows:

	March 31, 2016		December 31, 2015
Carrying value excluding unamortized debt issuance costs	$	3,065,603	$	2,968,997
Fair value	$	3,203,797	$	3,102,890