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Acquisitions Business Combinations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Payment for Contingent Consideration Liability, Financing Activities	$ 0	$ 10,000	$ 0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0	0	(18,674)
Goodwill, Acquired During Period	6,169	0
Amortization of Intangible Assets	15,700	15,100	14,300
BIOTIX [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		105,000
Payment for Contingent Consideration Liability, Financing Activities		10,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		18,700
Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 6,200	$ 2,000	$ 5,500

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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