Segment and Geographic Information - Additional Information (Detail) - Hospital	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Number of geographically organized groups	3	2
Number of owned and operated hospitals	180
Reorganization Group [Member] | National Group [Member]
Segment Reporting Information [Line Items]
Number of owned and operated hospitals	57
Reorganization Group [Member] | American Group [Member]
Segment Reporting Information [Line Items]
Number of owned and operated hospitals	55
Reorganization Group [Member] | Atlantic Group [Member]
Segment Reporting Information [Line Items]
Number of owned and operated hospitals	61
Reorganization Group [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Number of owned and operated hospitals	7