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Organization and Summary of Accounting Policies - Revenues by Sources (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 2,539.3 | $ 2,225.1 | $ 1,860.1
Revenue from related parties | 15.7 | 9.3 | 9.9
Total patient service revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 2,502.1 | $ 2,195.0 | $ 1,836.1
Total patient service revenues | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (percent) | 100.00% | 100.00% | 100.00%
Private insurance |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 1,288.0 | $ 1,110.1 | $ 989.9
Private insurance | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (percent) | 51.50% | 50.60% | 53.90%
Government |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 1,059.2 | $ 949.9 | $ 708.5
Government | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (percent) | 42.30% | 43.30% | 38.60%
Self-pay |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 65.9 | $ 61.1 | $ 58.5
Self-pay | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (percent) | 2.60% | 2.80% | 3.20%
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 89.0 | $ 73.9 | $ 79.2
Other | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (percent) | 3.60% | 3.30% | 4.30%
Other service revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 37.2 | $ 30.1 | $ 24.0

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