Dispositions and Acquisitions and Purchase of Third-Party Ownership Interests - Additional Information (Detail) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	May 31, 2016 USD ($) Hospital	Jun. 30, 2016 USD ($) Hospital	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($) Bed
Acquisitions And Divestitures [Line Items]
Acquisition of property and businesses			$ 27,525	$ 34,500
Minimum
Acquisitions And Divestitures [Line Items]
Ownership interests purchased		26.10%	26.10%
Maximum
Acquisitions And Divestitures [Line Items]
Ownership interests purchased		27.50%	27.50%
Acute Care Hospital Services | Las Vegas, Nevada
Acquisitions And Divestitures [Line Items]
Number of hospital facilities | Hospital	6	6
Payments to purchase minority ownership interests	$ 445,000	$ 445,000
Purchase price of minority ownership interests	418,000	418,000	$ 418,000
Return of reserve capital to purchase of minority ownership interests	$ 27,000	$ 27,000	$ 27,000
Acute Care Hospital Services | Minimum | Las Vegas, Nevada
Acquisitions And Divestitures [Line Items]
Ownership interests purchased		26.10%	26.10%
Acute Care Hospital Services | Maximum | Las Vegas, Nevada
Acquisitions And Divestitures [Line Items]
Ownership interests purchased		27.50%	27.50%
Behavioral Health Services
Acquisitions And Divestitures [Line Items]
Number of beds | Bed				46