Revenue Disaggregation of Revenue - Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 1,316,308	$ 1,271,004	$ 1,266,208
Percentage of revenue	100.00%	100.00%	100.00%
Infusion Consumables [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 555,189	$ 473,740	$ 477,611
Percentage of revenue	42.00%	37.00%	37.00%
Infusion Systems [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 352,321	$ 359,691	$ 328,282
Percentage of revenue	27.00%	28.00%	26.00%
IV Solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 359,477	$ 388,971	$ 414,971
Percentage of revenue	27.00%	31.00%	33.00%
Critical Care [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 49,321	$ 48,602	$ 45,344
Percentage of revenue	4.00%	4.00%	4.00%