Revenue Disaggregation of Revenue - Product Line (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 315,523,000	$ 307,471,000	$ 312,282,000	$ 330,932,000	$ 340,378,000	$ 327,169,000	$ 360,460,000	$ 372,033,000	$ 1,266,208,000	$ 1,400,040,000	$ 1,292,613,000
Percentage of revenue									100.00%	100.00%	100.00%
Infusion Consumables [Member]
Disaggregation of Revenue [Line Items]
Revenues									$ 477,611,000	$ 483,039,000	$ 365,665,000
Percentage of revenue									37.00%	35.00%	28.00%
IV Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues									$ 414,971,000	$ 507,985,000	$ 521,963,000
Percentage of revenue									33.00%	36.00%	40.00%
Infusion Systems [Member]
Disaggregation of Revenue [Line Items]
Revenues									$ 328,282,000	$ 355,484,000	$ 290,207,000
Percentage of revenue									26.00%	25.00%	23.00%
Critical Care [Member]
Disaggregation of Revenue [Line Items]
Revenues									$ 45,344,000	$ 53,532,000	$ 49,961,000
Percentage of revenue									4.00%	4.00%	4.00%
Other Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues									$ 0	$ 0	$ 64,817,000
Percentage of revenue									0.00%	0.00%	5.00%