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Segment reporting - Summary of Assets by Segment (Phantom) (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Equity method and other investments	$ 255,489	$ 241,983
U.S. dialysis
Segment Reporting Information [Line Items]
Equity method and other investments	130,732	124,188
Other—Ancillary services
Segment Reporting Information [Line Items]
Equity method and other investments	$ 124,757	$ 117,795

X

- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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