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Lease Commitments - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2019 USD ($) Hospital | Dec. 31, 2018 USD ($) | Dec. 31, 2017 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 | $ 383,857,000 | $ 0 | $ 0
Additional capital lease obligations incurred |  | $ 0 |
New Operating Leases |  |  |
Lessee Lease Description [Line Items] |  |  |
Right-of-use assets obtained in exchange for operating lease obligations | $ 29,300,000 |  |
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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- Definition Number of hospital facilities. + References No definition available. + Details
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- Definition Amount of increase in lease obligation from new lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + 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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- 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=77888426&loc=SL77918673-209980 + Details
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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=77888426&loc=SL77918673-209980 + Details
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- 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=77888426&loc=SL77918673-209980 + Details
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