Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Goodwill - Additional Information (Details) $ in Thousands	3 Months Ended	12 Months Ended
Goodwill - Additional Information (Details) $ in Thousands	Mar. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Goodwill [Line Items]
Goodwill impairment charges		$ 0	$ 124,892	$ 3,106
Other reporting units
Goodwill [Line Items]
Number of Operating Segments \| segment		0
GERMANY \| Kidney Care
Goodwill [Line Items]
Goodwill impairment charges	$ 41,037		119,476
GERMANY \| Other reporting units
Goodwill [Line Items]
Goodwill impairment charges			$ 5,416