Fair Value Measurement Derivative Instruments and Hedging Activities Disclosure (Details) $ in Thousands, € in Millions, ¥ in Millions, £ in Millions, SFr in Millions, CAD in Millions	Sep. 30, 2016 EUR (€)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 JPY (¥)	Sep. 30, 2016 CAD	Sep. 30, 2016 CHF (SFr)	Sep. 30, 2016 GBP (£)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 JPY (¥)	Dec. 31, 2015 CAD	Dec. 31, 2015 CHF (SFr)	Dec. 31, 2015 GBP (£)
Derivative [Line Items]
Foreign currency exposure on hedged foreign currency contracts		$ 178,800						$ 107,300
Foreign currency exposure on dedesignated foreign currency contracts		54,800						55,600
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, notional amount	€ 8.5		¥ 2,230.9	CAD 86.8	SFr 30.5	£ 29.4	€ 6.0		¥ 0.0	CAD 0.0	SFr 33.0	£ 39.2
Derivative assets (liabilities), at fair value, net		10,380						9,137
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, notional amount	€ 0.0		¥ 0.0		SFr 0.0	£ 36.5	€ 3.8		¥ 274.0		SFr 0.3	£ 31.5
Derivative assets (liabilities), at fair value, net		6,410						2,462
Prepaid Expenses and Other Current Assets [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative asset, current		11,650						3,956
Prepaid Expenses and Other Current Assets [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative asset, current		2,036						1,807
Other Noncurrent Assets [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative asset, noncurrent		0						5,183
Other Noncurrent Assets [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative asset, noncurrent		4,374						656
Other Current Liabilities [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative liability, current		872						0
Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative liability, current		0						1
Other Noncurrent Liabilities [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative liability, noncurrent		$ 398						$ 2