Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue Recognition
Net revenues	$ 256,637	$ 279,638	$ 723,810	$ 797,155
Patient Care
Revenue Recognition
Net revenues	212,664	230,931	598,706	652,700
Patient Care | Medicare
Revenue Recognition
Net revenues	68,135	72,879	194,052	206,295
Patient Care | Medicaid
Revenue Recognition
Net revenues	34,541	36,140	96,612	103,631
Patient Care | Commercial Insurance / Managed Care (excluding Medicare and Medicaid Managed Care)
Revenue Recognition
Net revenues	75,966	83,384	213,234	232,410
Patient Care | Veterans Administration
Revenue Recognition
Net revenues	19,339	23,816	54,057	64,635
Patient Care | Private Pay
Revenue Recognition
Net revenues	14,683	14,712	40,751	45,729
Patient Care | Operating segments
Revenue Recognition
Net revenues	212,664	230,931	598,706	652,700
Products & Services
Revenue Recognition
Net revenues	93,984	102,377	264,003	294,700
Products & Services | Operating segments
Revenue Recognition
Net revenues	43,973	48,707	125,104	144,455
Products & Services | Operating segments | Distribution services, net of intersegment revenue eliminations
Revenue Recognition
Net revenues	32,711	36,653	90,928	107,510
Products & Services | Operating segments | Therapeutic solutions
Revenue Recognition
Net revenues	$ 11,262	$ 12,054	$ 34,176	$ 36,945