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Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 360,460 | $ 331,514 | $ 732,493 | $ 579,253
Cumulative Effect on Retained Earnings, Net of Tax |  |  | 6,300 |
Infusion Systems [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 88,376 | $ 73,122 | 181,815 | $ 119,792
Infusion Systems [Member] | Transferred over Time [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,600 |  | 5,900 |
Equipment revenue [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Remaining Performance Obligation | 6,500 |  | 6,500 |
Software revenue [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Remaining Performance Obligation | $ 1,500 |  | $ 1,500 |

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