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Summary of Assets by Segment (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
ASSETS |  |  |
Total assets |  | $ 18,514,875 | $ 17,617,432
U.S. dialysis and related lab services |  |  |
ASSETS |  |  |
Total assets |  | 11,591,507 | 10,633,813
HealthCare Partners (HCP) |  |  |
ASSETS |  |  |
Total assets |  | 6,150,666 | 6,285,984
Other-Ancillary services and strategic initiatives |  |  |
ASSETS |  |  |
Total assets | [1] | $ 772,702 | $ 697,635
[1] | Includes approximately $69,519 and $ 44,146 in 2015 and 2014, respectively, of net property and equipment related to the Company’s international operations.

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