2. Acquisitions (Details) (USD $)			3 Months Ended		0 Months Ended	3 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 GnuBIO [Member]	Apr. 10, 2014 GnuBIO [Member]	Jan. 10, 2013 AbD Serotec [Member]	Jun. 30, 2013 AbD Serotec [Member]
Business Acquisition [Line Items]
Indefinite-lived Intangible Assets Acquired			$ 46,400,000
Cash Acquired from Acquisition						7,300,000
Business Combination, Consideration Transferred			50,400,000		62,200,000
Payments to Acquire Businesses, Gross			39,700,000
Business Combination, Contingent Consideration, Liability				10,700,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High				70,000,000
Goodwill	535,223,000	517,770,000		15,200,000	14,900,000
Finite-lived Intangible Assets Acquired					44,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net				$ (11,200,000)	$ 3,300,000