Revenue Disaggregated Revenue by Product Line (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 327,169,000	$ 343,236,000	$ 1,059,662,000	$ 922,489,000
Infusion Consumables [Member]
Disaggregation of Revenue [Line Items]
Revenues	117,797,000	92,612,000	361,490,000	245,885,000
IV Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	114,433,000	143,710,000	394,198,000	375,494,000
Infusion Systems [Member]
Disaggregation of Revenue [Line Items]
Revenues	81,456,000	82,798,000	263,271,000	202,590,000
Critical Care [Member]
Disaggregation of Revenue [Line Items]
Revenues	13,483,000	12,950,000	40,703,000	37,221,000
Other Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 11,166,000	$ 0	$ 61,299,000