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Organization and Summary of Accounting Policies - Variable Interest Entities (Details) $ in Millions | Dec. 31, 2020 USD ($) | Dec. 31, 2020 surgical_facility | Dec. 31, 2020 physician_practice | Dec. 31, 2019 USD ($)
--- | --- | --- | --- | ---
Variable Interest Entity [Line Items] |  |  |  |
Number of facilities included in VIE |  | 4 | 3 |
Assets | $ 5,413.2 |  |  | $ 5,018.9
Variable Interest Entity, Primary Beneficiary |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Assets | 27.7 |  |  | 36.2
Liabilities | $ 21.1 |  |  | $ 25.2

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