Segment and Related Information - Reconciliation of the reportable segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment and Related Information
Operating Income (Loss)	$ (2,545)	$ 2,021
Interest expense, net	7,385	7,340
Non-service defined benefit plan expense	160	167
Loss before income taxes	(10,090)	(5,486)
Benefit for income taxes	(2,113)	(2,156)
Net loss	(7,977)	(3,330)
Consolidated net revenues	261,287	237,470
Consolidated material costs	85,592	75,170
Corporate & other
Segment and Related Information
Operating Income (Loss)	(22,045)	(21,705)
Consolidated net revenues	0	0
Consolidating adjustments
Segment and Related Information
Consolidated net revenues	(54,675)	(47,047)
Patient Care
Segment and Related Information
Operating Income (Loss)	16,993	19,050
Consolidated net revenues	219,818	195,682
Consolidated material costs	70,976	59,922
Patient Care | Operating Segments
Segment and Related Information
Operating Income (Loss)	16,993	19,050
Consolidated net revenues	219,818	195,682
Consolidated material costs	59,918	51,617
Products & Services
Segment and Related Information
Operating Income (Loss)	2,507	4,676
Consolidated net revenues	96,144	88,835
Consolidated material costs	69,291	62,295
Products & Services | Operating Segments
Segment and Related Information
Operating Income (Loss)	2,507	4,676
Consolidated net revenues	41,469	41,788
Consolidated material costs	$ 25,674	$ 23,553