Revenue Disaggregated Revenue by Product Line (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 360,460,000	$ 331,514,000	$ 732,493,000	$ 579,253,000
Infusion Consumables [Member]
Disaggregation of Revenue [Line Items]
Revenues	123,782,000	77,561,000	243,693,000	153,274,000
IV Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	135,325,000	134,414,000	279,765,000	231,784,000
Infusion Systems [Member]
Disaggregation of Revenue [Line Items]
Revenues	88,376,000	73,122,000	181,815,000	119,792,000
Critical Care [Member]
Disaggregation of Revenue [Line Items]
Revenues	12,977,000	11,874,000	27,220,000	24,270,000
Other Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 34,543,000	$ 0	$ 50,133,000