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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Nov. 28, 2018 | Jun. 28, 2018 | Nov. 16, 2015
LMA [Member] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 25.00% |  |  |  |
Revenue from Related Parties | $ 21.6 | $ 17.6 |  |  |
Payment of Management fees outstanding | 0.8 | 0.4 |  |  |
Service [Member] | PMIOC [Member] |  |  |  |  |
Payment Made To Related Party | 2.5 | 2.3 |  |  |
Service [Member] | AMG, Inc [Member] |  |  |  |  |
Payment Made To Related Party | 3.8 | 2.1 |  |  |
Service [Member] | DMG [Member] |  |  |  |  |
Payment Made To Related Party | 7.0 | 6.1 |  |  |
Universal Care Inc [Member] |  |  |  |  |
Accounts and Other Receivables, Net, Current |  |  |  |  | $ 5.0
Equity Method Investment, Ownership Percentage |  |  |  |  | 48.90%
Advance Diagnostic Surgery Center [Member] | Service [Member] |  |  |  |  |
Payment Made To Related Party | 0.3 | 0.3 |  |  |
Medical Property Partners [Member] |  |  |  |  |
Payment Made To Related Party | 1.0 | 1.0 |  |  |
Medical Investment Group LLC [Member] |  |  |  |  |
Payment Made To Related Party | 0.2 | 0.4 |  |  |
APC Shareholders [Member] | Service [Member] |  |  |  |  |
Payment Made To Related Party | $ 35.2 | 41.5 |  |  |
APC Shareholders [Member] | Service [Member] | PMIOC [Member] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 40.00% |  |  |  |
APC Shareholders [Member] | Service [Member] | DMG [Member] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 40.00% |  |  |  |
Shareholders And Officers [Member] |  |  |  |  |
Payment Made To Related Party | $ 13.5 | 14.1 |  |  |
Universal Care Acquisition Partners, LLC [Member] |  |  |  |  |
Accounts and Other Receivables, Net, Current |  |  | $ 5.0 | $ 2.5 |
Critical Quality Management Corp [Member] |  |  |  |  |
Payment Made To Related Party | 0.4 | 0.1 |  |  |
Numen LLC [Member] |  |  |  |  |
Payment Made To Related Party | 0.5 | 0.5 |  |  |
AHMC [Member] |  |  |  |  |
Revenue from Related Parties | 68.2 | 42.6 |  |  |
Deferred Revenue, Revenue Recognized | $ 44.2 | $ 12.1 |  |  |

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