Investments and Fair Value Measurements Derivative Notional Instruments (Details) - Level 2 - Other current assets - Foreign Exchange Forward € in Thousands, ₪ in Thousands, ¥ in Thousands, ¥ in Thousands, £ in Thousands, SFr in Thousands, R$ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	Jun. 30, 2020 CNY (¥)	Jun. 30, 2020 USD ($)	Jun. 30, 2020 EUR (€)	Jun. 30, 2020 CAD ($)	Jun. 30, 2020 BRL (R$)	Jun. 30, 2020 GBP (£)	Jun. 30, 2020 JPY (¥)	Jun. 30, 2020 ILS (₪)	Jun. 30, 2020 MXN ($)	Jun. 30, 2020 CHF (SFr)	Jun. 30, 2020 AUD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 CAD ($)	Dec. 31, 2019 BRL (R$)	Dec. 31, 2019 GBP (£)	Dec. 31, 2019 JPY (¥)	Dec. 31, 2019 ILS (₪)	Dec. 31, 2019 MXN ($)	Dec. 31, 2019 AUD ($)
Derivative [Line Items]
Notional amount		$ 360,487											$ 333,871
Euro Member Countries, Euro
Derivative [Line Items]
Notional amount		90,879	€ 81,000										108,870	€ 97,000
Euro
Derivative [Line Items]
Notional amount	¥ 997,000	140,618										¥ 431,000	60,702
Brazilian Real
Derivative [Line Items]
Notional amount		9,647						₪ 33,400					18,439						₪ 63,700
British Pound
Derivative [Line Items]
Notional amount		24,584				£ 20,000							36,770				£ 28,000
Japanese Yen
Derivative [Line Items]
Notional amount		33,623		$ 46,000									39,802		$ 52,000
Israeli Shekel
Derivative [Line Items]
Notional amount		27,859			R$ 153,000								32,185			R$ 130,000
Japanese Yen
Derivative [Line Items]
Notional amount		22,154					¥ 2,385,000						27,604					¥ 3,000,000
Mexican Peso
Derivative [Line Items]
Notional amount		6,038							$ 140,000				7,398							$ 140,000
Australian Dollar
Derivative [Line Items]
Notional amount		1,924									$ 2,800		$ 2,101								$ 3,000
Switzerland, Francs
Derivative [Line Items]
Notional amount		$ 3,161								SFr 3,000