Lease Accounting - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) Hospital	Sep. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Lessee, operating lease, existence of option to extend [true false]	true
Number of hospital facilities | Hospital	3
Right-of-use assets obtained in exchange for operating lease obligations	$ 47,679	$ 364,453
New Operating Leases
Lessee Lease Description [Line Items]
Right-of-use assets obtained in exchange for operating lease obligations		$ 14,000
Two Hospital Facilities
Lessee Lease Description [Line Items]
Lease Expiration Term	2021
Third Hospital Facilities
Lessee Lease Description [Line Items]
Lease Expiration Term	2026
Minimum
Lessee Lease Description [Line Items]
Initial term of real estate lease	5 years
Real estate leases option to extend lease term	5 years
Maximum
Lessee Lease Description [Line Items]
Initial term of real estate lease	10 years
Real estate leases option to extend lease term	10 years