Stock-based Compensation Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock-based compensation expense:
Stock-based compensation expense	$ 325,047,000	$ 293,236,000	$ 240,623,000
Stock-based compensation expense related to inventories	(585,000)	(2,406,000)	(689,000)
Allocated stock-based compensation expense	325,047,000	$ 293,236,000	$ 240,623,000
Stock Options
Weighted-average assumptions for options and ESPP subscriptions granted
Expected annual dividends	$ 0
Employee stock purchase plan
Weighted-average assumptions for options and ESPP subscriptions granted
Expected stock price volatility (percent)	36.51%	39.09%	48.22%
Risk-free interest rate (percent)	2.36%	1.24%	0.56%
Expected term of options (in years)	9 months	9 months	9 months
Expected annual dividends	$ 0	$ 0	$ 0
Weighted average fair value (usd per share)	$ 44.04	$ 35.90	$ 26.86
Tranche one
Weighted-average assumptions for options and ESPP subscriptions granted
Vesting rights percentage	33.30%
Tranche two
Weighted-average assumptions for options and ESPP subscriptions granted
Vesting rights percentage	33.30%
Tranche three
Weighted-average assumptions for options and ESPP subscriptions granted
Vesting rights percentage	33.30%
Performance-based RSUs
Weighted-average assumptions for options and ESPP subscriptions granted
Potential awards, percent of target shares, minimum	0.00%
Potential awards, percent of target shares, maximum	200.00%
Weighted average fair value (usd per share)	$ 152.40
Performance-based RSUs | Tranche one
Weighted-average assumptions for options and ESPP subscriptions granted
Vesting period	3 years
Performance-based RSUs | Tranche two
Weighted-average assumptions for options and ESPP subscriptions granted
Vesting period	3 years
Financial performance shares
Weighted-average assumptions for options and ESPP subscriptions granted
Vesting period	3 years
Non-financial performance shares
Weighted-average assumptions for options and ESPP subscriptions granted
Vesting period	3 years
Stock options
Stock-based compensation expense:
Stock-based compensation expense	$ 107,854,000	$ 105,367,000	$ 114,768,000
Type of award:
Unrecognized Expense	$ 155,465,000
Weighted-average Recognition Period	2 years 7 months 21 days
Weighted-average grant-date fair value, granted (usd per share)	$ 60.83	$ 43.27	$ 37.93
Weighted-average assumptions for options and ESPP subscriptions granted
Expected stock price volatility (percent)	40.50%	45.31%	46.77%
Risk-free interest rate (percent)	2.61%	1.94%	1.32%
Expected term of options (in years)	4 years 6 months 18 days	4 years 8 months 5 days	4 years 10 months 28 days
Expected annual dividends	$ 0	$ 0	$ 0
Restricted stock and restricted stock units (including PSUs)
Stock-based compensation expense:
Stock-based compensation expense	207,845,000	181,258,000	118,709,000
Type of award:
Unrecognized Expense	$ 321,683,000
Weighted-average Recognition Period	2 years 6 months 29 days
ESPP share issuances
Stock-based compensation expense:
Stock-based compensation expense	$ 9,933,000	9,017,000	7,835,000
Type of award:
Unrecognized Expense	$ 5,132,000
Weighted-average Recognition Period	6 months 29 days
Cost of sales
Stock-based compensation expense:
Stock-based compensation expense	$ 4,543,000	2,500,000	2,918,000
Research and development expenses
Stock-based compensation expense:
Stock-based compensation expense	203,112,000	181,900,000	153,451,000
Sales, general and administrative expenses
Stock-based compensation expense:
Stock-based compensation expense	$ 117,392,000	$ 108,836,000	$ 84,254,000