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Summary of Assets by Segment (Parenthetical) (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Property and equipment, net | $ 3,175,367 | $ 2,788,740
Equity investments | 502,389 | 78,368
U.S. Dialysis And Related Lab Services |  |
Segment Reporting Information [Line Items] |  |
Equity investments | 66,924 | 29,801
DaVita Medical Group (DMG) |  |
Segment Reporting Information [Line Items] |  |
Equity investments | 10,350 | 22,714
Other-Ancillary services and strategic initiatives |  |
Segment Reporting Information [Line Items] |  |
Equity investments | 425,115 | 20,853
Outside United States | Other-Ancillary services and strategic initiatives |  |
Segment Reporting Information [Line Items] |  |
Property and equipment, net | $ 96,396 | $ 69,519

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