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Acquisitions (Narratives) (Details) - USD ($) $ in Millions |  | 2 Months Ended | 3 Months Ended
--- | --- | --- | ---
Jan. 31, 2018 | Mar. 31, 2018 | Mar. 31, 2019
Business Acquisition [Line Items] |  |  |
Business Acquisition, Effective Date of Acquisition |  |  | Jan. 31, 2018
Acquisition purchase price | $ 71.1 |  |
Business Acquisition, Description of Acquired Entity |  |  | DSI, a St. Paul, Minnesota-based life science research company, is a recognized leader in physiologic monitoring focused on delivering preclinical products, systems, services and solutions to its customers.
Business Acquisition Direct Acquisition Costs In Income Statement |  | $ 2.6 | $ 0.0
The results of operations for DSI: |  |  |
Revenue of Acquiree since Acquisition Date |  | 7.6 |
Earnings or Loss of Acquiree since Acquisition Date |  | 0.4 |
Busniess combination purchase accounting inventory fair value step up amortization |  | 1.5 |
Preliminary amount of inventory fair value step up |  | 3.8 |
Intangible asset amortization expense |  | $ 0.7 |
Data Sciences International, Inc. (DSI) [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 9 years 3 months 18 days
The results of operations for DSI: |  |  |
Amortization Period of purchase accounting inventory fair value step up amortization |  |  | 5 years 6 months
Trade Names [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 7 years 6 months
Trade Names [Member] | Data Sciences International, Inc. (DSI) [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 9 years 4 months 24 days
Developed Technology [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 6 years 10 months 24 days
Developed Technology [Member] | Data Sciences International, Inc. (DSI) [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 8 years 2 months 12 days
Customer Relationships [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 10 years 4 months 24 days
Customer Relationships [Member] | Data Sciences International, Inc. (DSI) [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 12 years 4 months 24 days
In-process research and development [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 7 years 2 months 12 days
In-process research and development [Member] | Data Sciences International, Inc. (DSI) [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Assets, Weighted Average Useful Life |  |  | 7 years 4 months 24 days

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