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Organization and Summary of Accounting Policies - Revenues by Sources (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 2,225.1 | $ 1,860.1 | $ 1,831.4
Patient service revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 2,195.0 | $ 1,836.1 | $ 1,803.1
Patient service revenues | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (as a percent) | 100.00% | 100.00% | 100.00%
Private insurance |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 1,110.1 | $ 989.9 | $ 970.5
Private insurance | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (as a percent) | 50.60% | 53.90% | 53.80%
Government |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 949.9 | $ 708.5 | $ 701.9
Government | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (as a percent) | 43.30% | 38.60% | 38.90%
Self-pay |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 61.1 | $ 58.5 | $ 46.1
Self-pay | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (as a percent) | 2.80% | 3.20% | 2.60%
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 73.9 | $ 79.2 | $ 84.6
Other | Customer | Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue by service type as a proportion of total revenues (as a percent) | 3.30% | 4.30% | 4.70%
Other service revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 30.1 | $ 24.0 | $ 28.3

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