Acquisitions Business Combinations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 01, 2017
Business Acquisition [Line Items]
Payment for Contingent Consideration Liability, Financing Activities	$ 10,000	$ 0	$ 0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0	(18,674)	0
Goodwill, Acquired During Period	0	558
Amortization of Intangible Assets	$ 15,100	14,300	11,500
BIOTIX [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred			105,000
Business Combination, Contingent Consideration, Liability				$ 30,700
Payment for Contingent Consideration Liability, Financing Activities			10,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		18,700
Goodwill, Acquired During Period			51,700
Amortization of Intangible Assets			3,700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net			$ 18,800
Minimum Weighted Average Useful Lives			5 years
Maximum Weighted Average Useful Lives			18 years
Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		5,500	$ 3,800
Goodwill, Acquired During Period		600	300
Finite-lived Intangible Assets Acquired		$ 4,900	$ 3,100
Maximum Weighted Average Useful Lives		10 years	12 years
Customer Relationships [Member] | BIOTIX [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			$ 49,500
Technology-Based Intangible Assets [Member] | BIOTIX [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			8,000
Other Intangible Assets [Member] | BIOTIX [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			600
Trade Names [Member] | BIOTIX [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			$ 7,100