Goodwill and Other Intangible Assets - Goodwill (Details) $ in Thousands			3 Months Ended	12 Months Ended
	Oct. 01, 2017 USD ($) item	Oct. 01, 2016 item	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Goodwill
Number of Reporting Units | item	3
Impairment of intangible assets			$ 183		$ 183	$ 54,735
Measurement period adjustments related to acquisitions				$ 2,100	300
Goodwill allocated
Goodwill, Gross as of beginning of the year				766,709	764,310
Goodwill, Accumulated Impairment			(567,967)	(567,967)	(567,967)	(567,967)
Goodwill, Net as of beginning of the year				198,742	196,343
Goodwill impairment				0	0	53,300
Additions from acquisitions				35,926	2,399
Measurement period adjustments				(2,424)
Goodwill, Gross as of end of the year			766,709	800,211	766,709	764,310
Goodwill, Net as of end of the year			198,742	232,244	198,742	196,343
Patient Care
Goodwill allocated
Goodwill, Gross as of beginning of the year				627,410	625,011
Goodwill, Accumulated Impairment			(428,668)	(428,668)	(428,668)	(428,668)
Goodwill, Net as of beginning of the year				198,742	196,343
Additions from acquisitions				35,926	2,399
Measurement period adjustments				(2,424)
Goodwill, Gross as of end of the year			627,410	660,912	627,410	625,011
Goodwill, Net as of end of the year			198,742	232,244	198,742	196,343
Products & Services
Goodwill
Number of Reporting Units | item	2	2
Impairment of intangible assets					183	54,735
Goodwill allocated
Goodwill, Gross as of beginning of the year				139,299	139,299
Goodwill, Accumulated Impairment			(139,299)	(139,299)	(139,299)	(139,299)
Goodwill, Gross as of end of the year			$ 139,299	139,299	$ 139,299	$ 139,299
Goodwill, Net as of end of the year				$ 0
Therapeutic
Goodwill
Impairment of intangible assets	$ 32,800
Distribution
Goodwill
Impairment of intangible assets	$ 20,500