Dispositions and Acquisitions - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) Hospital	Mar. 31, 2015 USD ($) Bed
Acquisitions And Divestitures [Line Items]
Aggregate purchase price to purchase the minority ownership interests	$ 445,000
Acquisition of property and businesses	$ (19,543)	$ (34,500)
Minimum
Acquisitions And Divestitures [Line Items]
Ownership interests purchased	26.10%
Maximum
Acquisitions And Divestitures [Line Items]
Ownership interests purchased	27.50%
Acute Care Hospital Services | Las Vegas, Nevada
Acquisitions And Divestitures [Line Items]
Number of hospital facilities | Hospital	6
Behavioral Health Services
Acquisitions And Divestitures [Line Items]
Number of beds | Bed		46