Revenue Disaggregated Revenue by Product Line (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 372,033,000	$ 247,739,000
Infusion Consumables [Member]
Disaggregation of Revenue [Line Items]
Revenues	119,911,000	75,713,000
IV Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	144,440,000	97,370,000
Infusion Systems [Member]
Disaggregation of Revenue [Line Items]
Revenues	93,439,000	46,670,000
Critical Care [Member]
Disaggregation of Revenue [Line Items]
Revenues	14,243,000	12,396,000
Other Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 15,590,000