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Business Combinations, Assets Held for Sale and Discontinued Operations - Schedule of Management Services Service Line (Detail) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Assets |  |
Other assets | $ 0 | $ 1,641,580
Radiology Services Medical Group [Member] |  |
Assets |  |
Accounts receivable, net | 54,284 | 64,603
Prepaid expenses and other current assets | 9,819 | 9,744
Property and equipment, net | 20,078 | 19,204
Operating leases right-of-use assets | 14,165 | 15,008
Goodwill | 640,818 | 685,170
Intangible assets, net | 170,059 | 180,978
Deferred income tax assets | 6,020 | 18,183
Other assets | 36,305 | 40,724
Total Assets | 951,548 | 1,033,614
Liabilities |  |
Accounts payable and accrued expenses | 39,505 | 42,474
Operating and finance leases | 13,619 | 14,355
Long-term professional liabilities | 23,744 | 21,978
Other liabilities | 1,844 | 81
Total Liabilities | $ 78,712 | $ 78,888

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