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Business Combinations, Assets Held for Sale and Discontinued Operations - Additional information (Detail) $ in Thousands |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 06, 2020 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Net incremental loss on the sale of MedData |  | $ (38,392) | $ (1,268,803) | $ (718,125) | $ (1,539,314) |  |
Goodwill |  | 1,480,668 |  | 1,480,668 |  |  | $ 1,479,850
Pediatric Subspecialty Practice [Member] |  |  |  |  |  |  |
Business acquisition total consideration |  |  |  | 2,100 |  |  |
Business acquisition consideration paid in cash |  |  |  | 1,900 |  |  |
Goodwill |  | 800 |  | 800 |  |  |
Other intangible assets |  | 1,300 |  | $ 1,300 |  |  |
Number of other pediatric subspecialty practices acquired |  |  |  | 1 |  |  |
Business acquisition contingent consideration liability |  | 200 |  | $ 200 |  |  |
Deferred Tax Assets, Goodwill and Intangible Assets |  | 4,000 |  | 4,000 |  |  |
North American Partners In Anesthesia [Member] |  |  |  |  |  |  |
Preliminary and incremental gain loss on sale |  |  |  | 648,700 |  |  |
Increase decrease in valuation allowance deferred tax assets |  |  |  | 419,000 |  |  |
Net incremental loss on the sale of MedData |  | (4,698) | $ (1,176,187) | (684,063) | $ (1,139,525) |  |
Proceeds from Divestiture of Businesses | $ 50,000 |  |  |  |  |  |
Maximum consideration receivable | 250,000 |  |  |  |  |  |
Accounts receivable retained |  |  |  |  |  | $ 110,000 |
North American Partners In Anesthesia [Member] | Tax Year Two Thousand and Twenty Five [Member] |  |  |  |  |  |  |
Capital loss carry forward |  | 1,680,000 |  | 1,680,000 |  |  |
North American Partners In Anesthesia [Member] | Maximum [Member] |  |  |  |  |  |  |
Maximum consideration receivable | 250,000 |  |  |  |  |  |
North American Partners In Anesthesia [Member] | Minimum [Member] |  |  |  |  |  |  |
Maximum consideration receivable | $ 0 |  |  |  |  |  |
Divestiture of MedData [Member] |  |  |  |  |  |  |
Net incremental loss on the sale of MedData |  |  |  | 5,800 |  |  |
Radiology Services Medical Group [Member] |  |  |  |  |  |  |
Maximum consideration receivable |  | $ 885,000 |  | 885,000 |  |  |
Non-cash charge against goodwill |  |  |  | 43,000 |  |  |
Deferred Tax Assets Goodwill [Member] | Pediatric Subspecialty Practice [Member] |  |  |  |  |  |  |
Non-cash charge against goodwill |  |  |  | $ 47,000 |  |  |

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