Marketable Securities and Fair Value Measurements - Derivative Financial Instruments (Details) - Foreign Exchange Forward € in Thousands, ¥ in Thousands, ¥ in Thousands, £ in Thousands, R$ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 JPY (¥)	Dec. 31, 2019 AUD ($)	Dec. 31, 2019 CAD ($)	Dec. 31, 2019 MXN ($)	Dec. 31, 2019 BRL (R$)	Dec. 31, 2018 EUR (€)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 JPY (¥)	Dec. 31, 2018 AUD ($)	Dec. 31, 2018 GBP (£)	Dec. 31, 2018 CAD ($)	Dec. 31, 2018 BRL (R$)
Derivative [Line Items]
Net gain on derivative	$ 3,200	$ 9,900
Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount					$ 333,871								$ 200,382
Euro Member Countries, Euro | Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount			€ 97,000		108,870						€ 62,000		71,095
China, Yuan Renminbi | Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount				¥ 431,000	60,702							¥ 375,000	54,515
Canada, Dollars | Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount					39,802			$ 52,000					19,808				$ 27,000
Israel, New Shekels | Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount					18,439			63,700
United Kingdom, Pounds | Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount					36,770			$ 28,000					16,635			£ 13,000
Japan, Yen | Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount					27,604	¥ 3,000,000							15,357	¥ 1,700,000
Brazil, Brazil Real | Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount					32,185					R$ 130,000			20,858					R$ 81,000
Mexico, Pesos | Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount					7,398				$ 140,000
Australia, Dollars | Level 2 | Prepaid expenses and other current assets:
Derivative [Line Items]
Derivative Asset, Notional Amount					$ 2,101		$ 3,000						$ 2,114		$ 3,000