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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 |

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