Real Estate and Other Activities - Adeptus Health - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) Facility Property Lease	Dec. 31, 2020 USD ($) Property	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Number of properties sold | Property			6
Proceeds from sale of facilities	$ 54,500	$ 246,000	$ 94
Adeptus Health [Member]
Business Acquisition [Line Items]
Number of leased properties | Lease		60
Real estate impairment charge			$ 20,000	$ 2,000
Number of properties sold | Property		12
Proceeds from sale of facilities		$ 43
Number of facilities transitioned | Facility		3
Adeptus Health [Member] | Maximum [Member]
Business Acquisition [Line Items]
Percentage of vacant on leased property	0.50%	0.50%