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Segment reporting - Summary of Assets by Segment (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Total assets	$ 17,633,940	$ 16,988,516
U.S. dialysis
ASSETS
Total assets	15,939,286	15,344,647
Other—Ancillary services
ASSETS
Total assets	$ 1,694,654	$ 1,643,869

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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