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Discontinued Operations - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 15, 2020 | Jul. 01, 2020 | May 06, 2020 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Non-cash charge against goodwill |  |  |  |  | $ 47,000 |  |  |  |  |  |  |  |  |
Preliminary gain loss on sale |  |  |  |  | 36,400 |  |  |  |  |  |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  |  |  | $ (68,783) | (38,392) | $ (679,520) | $ (213) | $ (596) | $ (1,268,803) | $ (14,772) | $ (255,739) | $ (786,908) | $ (1,539,910) | $ 147,115
North American Partners In Anesthesia [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preliminary gain loss on sale |  |  |  |  |  |  |  |  |  |  |  | 663,700 |  |
Proceeds from Divestiture of Businesses |  |  | $ 50,000 |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable Retained |  |  | 110,000 |  |  |  |  |  |  |  |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  | 430,000 |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  | 717,200 | 1,120,000 | 99,700
Disposal Group Not Discontinued Operation Goodwill Impairment Loss |  |  |  |  |  |  |  |  |  |  |  |  | 1,330,000 |
North American Partners In Anesthesia [Member] | Tax Year Two Thousand And Twenty Five [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital loss carry forward |  |  |  | $ 1,710,000 |  |  |  |  |  |  |  | 1,710,000 |  |
Divestiture Of Meddata [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  | 5,800 | 347,600 | 10,000
Radiology Services Medical Group [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash charge against goodwill |  |  |  |  |  |  |  |  |  |  |  | 47,000 | 117,900 |
Net proceeds for the radiology services medical group | $ 865,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Preliminary gain loss on sale |  |  |  |  |  |  |  |  |  |  |  | 36,400 |  |
Net Revenue |  |  |  |  |  |  |  |  |  |  |  | 451,400 | 489,400 | 444,000
Operating Income From Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  | 73,600 | 75,300 |
Repayment of debt |  | $ 750,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  | 5.25% |  |  |  |  |  |  |  |  |  |  |  |
Loss from Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  | 63,800 | 72,800 | 37,400
Purchase consideration cash payment |  |  |  |  | 885,000 |  |  |  |  |  |  |  |  |
Anesthesiology Services Medical Group [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preliminary gain loss on sale |  |  |  |  |  |  |  |  |  |  |  | 663,700 |  | 48,400
Net Revenue |  |  |  |  |  |  |  |  |  |  |  | 379,400 | 1,250,000 | 1,290,000
Operating Income From Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  | 716,300 | $ 1,230,000 | $ 135,000
Maximum [Member] | North American Partners In Anesthesia [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Consideration Receivable |  |  | 250,000 |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] | North American Partners In Anesthesia [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum Consideration Receivable |  |  | $ 0 |  |  |  |  |  |  |  |  |  |  |
Deferred Tax Assets Intangible Assets [Member] | Radiology Services Medical Group [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash charge against goodwill |  |  |  |  | 43,000 |  |  |  |  |  |  | $ 4,000 |  |
Deferred Tax Assets, Goodwill and Intangible Assets |  |  |  |  | $ 4,000 |  |  |  |  |  |  |  |  |

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