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Other Intangible Assets - Other Identifiable Intangible Assets and Related Accumulated Amortization (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items] |  |
Intangible assets subject to amortization, Gross Carrying Amount | $ 3,247 | $ 3,247
Intangible assets not subject to amortization, Gross Carrying Amount | 89,796 | 88,990
Total | 93,043 | 92,237
Intangible assets subject to amortization, Accumulated Amortization | (3,247) | (3,247)
Intangible assets not subject to amortization, Accumulated Amortization | 0 | 0
Total | (3,247) | (3,247)
Licenses and Accreditations [Member] |  |
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items] |  |
Intangible assets not subject to amortization, Gross Carrying Amount | 12,259 | 12,343
Intangible assets not subject to amortization, Accumulated Amortization | 0 | 0
Trade Names [Member] |  |
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items] |  |
Intangible assets not subject to amortization, Gross Carrying Amount | 60,572 | 60,109
Intangible assets not subject to amortization, Accumulated Amortization | 0 | 0
Certificates of Need [Member] |  |
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items] |  |
Intangible assets not subject to amortization, Gross Carrying Amount | 16,965 | 16,538
Intangible assets not subject to amortization, Accumulated Amortization | 0 | 0
Contract Intangible Assets [Member] |  |
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items] |  |
Intangible assets subject to amortization, Gross Carrying Amount | 2,100 | 2,100
Intangible assets subject to amortization, Accumulated Amortization | (2,100) | (2,100)
Non-Compete Agreements [Member] |  |
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items] |  |
Intangible assets subject to amortization, Gross Carrying Amount | 1,147 | 1,147
Intangible assets subject to amortization, Accumulated Amortization | $ (1,147) | $ (1,147)

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