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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 575,911	$ 504,666	$ 1,127,430	$ 1,004,717
Cost of goods sold	274,244	231,291	523,560	461,279
Deferred Revenue	41,400		41,400			$ 36,700
Revenue, Net	22,400
Retained earnings	4,281,275		4,281,275			1,830,439
Accumulated other comprehensive income	(18,710)		(18,710)			738,794
Total stockholders' equity	4,638,946		$ 4,638,946			2,930,250
Revenue Allocation Percent To Lease Elements			5.00%
Additional paid-in-capital	376,595		$ 376,595			$ 361,231
Unrealized Gain on Securities	286,398	0	1,102,332	0
Selling, general and administrative expense	210,425	212,489	419,555	406,891
Research and Development Expense	47,450	62,587	96,877	112,039
Interest expense	5,977	6,045	11,759	11,361
Prepaid Taxes					$ (22,800)
Deferred Tax Assets, Net, Noncurrent					5,200
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings					100
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Investments	600		600
Accumulated other comprehensive income					679,200
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investments					1,097,400
Deferred Income Tax Expense (Benefit)	62,600		243,800
Cost of goods sold		(76)		(152)
Retained earnings					1,543,700
Deferred Income Tax Assets, Net					232,900
Total stockholders' equity					864,500
Unrealized Gain on Securities	286,400		1,102,300
Selling, general and administrative expense		(538)		(1,076)
Research and Development Expense		(36)		(72)
Interest expense		275		550
Other Nonoperating Income (Expense)		375		750
Restricted Cash	1,100	1,000	1,100	1,000
Accounting Standards Update 2016-16 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings					$ (17,600)
Europe [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	197,200	163,900	396,800	348,900
Asia Pacific [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	122,000	107,500	231,400	202,300
UNITED STATES
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	221,600	202,500	431,500	389,800
Americas [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 35,100	$ 30,800	$ 67,700	$ 63,700