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Lease Accounting - Additional Information (Detail) $ in Thousands | 9 Months Ended
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Sep. 30, 2020 USD ($) Hospital | Sep. 30, 2019 USD ($)
Lessee Lease Description [Line Items] |  |
Lessee, operating lease, existence of option to extend [true false] | true |
Number of hospital facilities | Hospital | 3 |
Right-of-use assets obtained in exchange for operating lease obligations | $ 47,679 | $ 364,453
New Operating Leases |  |
Lessee Lease Description [Line Items] |  |
Right-of-use assets obtained in exchange for operating lease obligations |  | $ 14,000
Two Hospital Facilities |  |
Lessee Lease Description [Line Items] |  |
Lease Expiration Term | 2021 |
Third Hospital Facilities |  |
Lessee Lease Description [Line Items] |  |
Lease Expiration Term | 2026 |
Minimum |  |
Lessee Lease Description [Line Items] |  |
Initial term of real estate lease | 5 years |
Real estate leases option to extend lease term | 5 years |
Maximum |  |
Lessee Lease Description [Line Items] |  |
Initial term of real estate lease | 10 years |
Real estate leases option to extend lease term | 10 years |

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- Definition Lease expiration term. + References No definition available. + Details
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Balance Type: | na
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- Definition Number of hospital facilities. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Indicates (true false) whether lessee has option to extend operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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Period Type: | duration

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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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Balance Type: | debit
Period Type: | duration

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- Details
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- Details
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- Details
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