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v3.21.2

Business Combinations and Discontinued Operations - Additional information (Detail) $ in Thousands | 9 Months Ended
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Sep. 30, 2021 USD ($) Number | Sep. 30, 2020 USD ($)
Increase in income tax receivable | $ 16,391 | $ 28,837
Pediatric Orthopedic Multi Location Urgent Care Cardiology Neurology And Maternal Fetal Medicine Practice [Member] |  |
Business acquisition total consideration | 24,600 |
Business acquisition consideration paid in cash | 19,600 |
Business combination consideration identifiable as current and long term liabilities | 5,000 |
Goodwill | 19,300 |
Other intangible assets | 1,800 |
Fixed assets | $ 3,500 |
Pediatric Orthopedic Practice [Member] |  |
Number of other pediatric orthopedic practice acquired | Number | 1 |
Multi Location Pediatric Urgent Care Practice [Member] |  |
Number of other multi location pediatric urgent care practice acquired | Number | 1 |
Pediatric Cardiology Practice [Member] |  |
Number of other pediatric cardiology practice acquired | Number | 1 |
Pediatric Neurology Practice [Member] |  |
Number of other pediatric neurology practices acquired | Number | 1 |
Maternal Fetal Medicine Practice [Member] |  |
Number of other maternal fetal medicine practices acquired | Number | 1 |
North American Partners In Anesthesia [Member] |  |
Increase decrease in valuation allowance deferred tax assets | $ 37,000 |
Increase in income tax receivable | 24,000 |
Tax adjustments, sttlements and unusual provisions | 9,000 |
Increase in deferred tax assets | 17,000 |
Anesthesiology Services Medical Group [Member] |  |
Incremental loss on sale, net | 19,000 |
Radiology Services Medical Group [Member] |  |
Incremental loss on sale, net | $ 3,300 |

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