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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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 572,619	$ 575,911	$ 1,126,598	$ 1,127,430
Cost of goods sold	264,850	274,244	507,067	523,560
Deferred Revenue	44,400		44,400			$ 37,300
Deferred Revenue, Period Increase (Decrease)			24,900
Revenue, Net			17,800
Retained earnings	5,184,511		5,184,511			3,722,073
Accumulated other comprehensive loss	(49,573)		(49,573)			(46,958)
Total stockholders' equity	$ 5,486,810	$ 4,638,946	$ 5,486,810	$ 4,638,946	$ 4,863,855	4,020,331	$ 4,488,091		$ 2,930,250
Revenue Allocation Percent To Lease Elements	3.00%	5.00%	3.00%	5.00%
Additional paid-in-capital	$ 410,601		$ 410,601			$ 394,342
Unrealized Gain on Securities	716,389	$ 286,398	1,775,619	$ 1,102,332
Selling, general and administrative expense	201,257	210,425	408,838	419,555
Research and Development Expense	50,122	47,450	97,697	96,877
Interest expense	5,841	5,977	11,827	11,759
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings								$ 100
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized Cloud Computing Arrangements	1,700		1,700
Europe [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	188,200	197,200	374,100	396,800
Asia Pacific [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	127,300	122,000	233,700	231,400
UNITED STATES
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	222,100	221,600	448,200	431,500
Americas [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 35,000	$ 35,100	$ 70,600	$ 67,700

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