Lease Commitments - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Hospital	Dec. 31, 2019 USD ($)
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	$ 69,678	$ 383,857
Finance lease obligations	$ 37,000
New Operating Leases
Lessee Lease Description [Line Items]
Right-of-use assets obtained in exchange for operating lease obligations		$ 29,300
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