1. Basis of Presentation and Use of Estimates Organization, Consolidation and Presentation of Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 536,880	$ 572,619	$ 1,108,524	$ 1,126,598
Cost of goods sold	243,892	264,850	498,168	507,067
Deferred Revenue	51,000		51,000			$ 45,800
Retained earnings	7,123,093		7,123,093			5,470,779
Accumulated other comprehensive loss	(61,142)		(61,142)			(87,348)
Total stockholders' equity	$ 7,353,402	$ 5,486,810	$ 7,353,402	$ 5,486,810	$ 6,293,079	5,755,057	$ 4,863,855	$ 4,020,331
Revenue Allocation Percent To Lease Elements	3.00%	3.00%	3.00%	3.00%
Additional paid-in-capital	$ 429,485		$ 429,485			410,020
Selling, general and administrative expense	189,262	$ 201,257	382,954	$ 408,838
Research and Development Expense	51,984	50,122	101,287	97,697
Interest expense	5,740	5,841	11,430	11,827
Other Nonoperating Income (Expense)	17,229	3,896	20,502	22,592
Deferred Revenue, Current	38,100		38,100			$ 33,700
Europe [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	174,000	188,200	369,700	374,100
Asia Pacific [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	129,000	127,300	240,400	233,700
UNITED STATES
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	205,400	222,100	434,900	448,200
Americas [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 28,500	$ 35,000	$ 63,500	$ 70,600