Segment and Related Information - Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment and Related Information
Net revenues	$ 1,120,488	$ 1,001,150	$ 1,098,046
Material costs	354,342	315,410	357,771
Personnel expenses	397,574	351,191	372,225
Other expenses	135,630	100,010	135,224
Depreciation and amortization	32,519	34,847	35,925
Segment income from operations	72,671	71,907	65,428
Purchase of property, plant and equipment	22,579	24,500	26,433
Patient Care
Segment and Related Information
Net revenues	943,328	831,603	905,691
Material costs	287,204	247,384	274,801
Personnel expenses	339,578	302,206	319,633
Other expenses	152,947	115,924	151,140
Depreciation and amortization	19,622	18,892	18,541
Segment income from operations	143,977	147,197	141,576
Purchase of property, plant and equipment	10,242	10,607	16,102
Purchase of therapeutic program equipment leased to third parties under operating leases	0	0	0
Patient Care | Third party
Segment and Related Information
Net revenues	943,328	831,603	905,691
Material costs	248,961	221,566	250,407
Patient Care | Intersegments
Segment and Related Information
Net revenues	0	0	0
Material costs	38,243	25,818	24,394
Products & Services
Segment and Related Information
Net revenues	397,952	359,151	395,851
Material costs	287,930	257,630	286,466
Personnel expenses	57,996	48,985	52,592
Other expenses	26,951	24,638	28,178
Depreciation and amortization	7,860	10,173	10,650
Segment income from operations	17,215	17,725	17,965
Purchase of property, plant and equipment	9,215	11,040	2,368
Purchase of therapeutic program equipment leased to third parties under operating leases	2,280	3,592	6,672
Products & Services | Third party
Segment and Related Information
Net revenues	177,160	169,547	192,355
Material costs	105,381	93,844	107,364
Products & Services | Intersegments
Segment and Related Information
Net revenues	220,792	189,604	203,496
Material costs	$ 182,549	$ 163,786	$ 179,102