Other Intangible Assets - Other Identifiable Intangible Assets and Related Accumulated Amortization (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	$ 3,347	$ 3,347
Intangible assets not subject to amortization, Gross Carrying Amount	84,856	59,225
Total	88,203	62,572
Intangible assets subject to amortization, Accumulated Amortization	(3,207)	(2,997)
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	(1,960)	(1,750)
Non-Compete Agreements [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	1,247	1,247
Intangible assets subject to amortization, Accumulated Amortization	(1,247)	(1,247)
Licenses and Accreditations [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	12,398	11,479
Trade Names [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	59,224	37,800
Certificates of Need [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	$ 13,234	$ 9,946