Business Combinations, Dispositions and Other Strategic Investments - Consideration Paid for the Lloyd Animal Health Products Acquisition and the Fair Value of the Acquired Assets and Assumed Liabilities (Details) - Lloyd Animal Health Products [Member] - USD ($) $ in Thousands		12 Months Ended
	Oct. 02, 2014	Dec. 31, 2015
Business Acquisition [Line Items]
Amount of cash paid	$ 16,100
Contingent payment	$ 2,000
Business Combination Discount Rate of Additional Consideration Owed	4.50%
Total consideration at closing	$ 18,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	2,500
Product licensing rights	10,000
IPR&D	5,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(100)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total	18,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years 8 months 12 days
Adjusted Fair Valuation [Member]
Business Acquisition [Line Items]
Contingent payment	$ 1,900