Business Combinations and Other Strategic Investments - Narrative (Details) $ in Thousands, shares in Millions, SFr in Millions							1 Months Ended	12 Months Ended			36 Months Ended
	Jan. 02, 2015 USD ($)	Jul. 22, 2014 CHF (SFr)	Jun. 27, 2014 USD ($)	Apr. 17, 2014 USD ($)	Sep. 30, 2011 USD ($)	Aug. 01, 2011 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2016 USD ($)	May 31, 2017 USD ($)	Oct. 22, 2014 shares
Business Acquisition [Line Items]
Gain from bargain purchase								$ 0	$ 0	$ 849
Available-for-sale securities								35	1,106		$ 1,106
Gain on sale of available-for-sale security								199	$ 45	$ 237
Nicox
Business Acquisition [Line Items]
Unrestricted shares sold (in Shares) | shares									0.5	1.1
Proceeds from sale							$ 2,600		$ 6,000	$ 2,500
Gain (loss) realized on sale									$ 200	$ 200
Available-for-sale securities sold								1,500			$ 9,200
Gain realized on sale of securities								200
Available-for-sale securities												$ 3,000
Gain on sale of available-for-sale security							$ 400
Available-for-sale securities, amortized cost basis								$ 100
Akorn AG, formerly Excelvision
Business Acquisition [Line Items]
Total consideration at closing	$ 28,400	SFr 21.7
Gain from bargain purchase	$ 900
Aciex Agreement
Business Acquisition [Line Items]
Total consideration at closing			$ 10,800
Payments to acquire additional interest in subsidiaries					$ 2,000	$ 8,000
Ownership interests in strategic investments, less than (as a percent)			20.00%
Shares received on disposition of assets (in Shares) | shares													4.3
Aciex Agreement | Convertible Debt
Business Acquisition [Line Items]
Payments for other strategic investments			$ 400	$ 400