Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended	6 Months Ended	12 Months Ended			23 Months Ended
	Jun. 30, 2022	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) separate_payment periodicRate adjustment group	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2022
Summary Of Significant Accounting Policies [Line Items]
Medicare sequestration reduction adjustment	1.00%	2.00%				2.00%
Number of days from date RAP paid to submit final medicare bill			30 days
Number of medicare home health resource groups | group			432
Number of medicare clinical groups | group			12
Number of retroactive adjustments | adjustment			3
Selected hospice, periodic rates used to calculate revenue | periodicRate			1
Number of hospice, periodic rates used to calculate revenue | periodicRate			4
Number of separate payment rates | separate_payment			2
Percentage subject to inpatient cap			20.00%
Determination period for hospice Medicare inpatient reimbursement cap			12 months
Net service revenue			$ 2,282,771,000	$ 2,219,622,000	$ 2,063,204,000
Workers' compensation, maximum coverage per incident			1,000,000
Maximum coverage per incident			500,000
Goodwill impairment loss			0	0	0
Disposal related to goodwill associated with closure of underperforming locations		$ 5,300,000	5,300,000	20,000.00	500,000
Loss on impairment of intangible assets			0	0	$ 0
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration]					Impairment of intangibles and other
Impairment of long-lived assets			5,600,000	900,000	$ 700,000
Amortization expense			4,600,000	1,500,000	1,200,000
Depreciation expense			$ 18,600,000	19,400,000	20,000,000
Interest costs capitalized				1,000,000	1,100,000
Redeemable noncontrolling interests were identified as mandatorily redeemable interests			0
General liability
Summary Of Significant Accounting Policies [Line Items]
Deductibles			$ 300,000
D&O coverage
Summary Of Significant Accounting Policies [Line Items]
Deductibles			$ 2,500,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Intangible asset estimated useful life			3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Intangible asset estimated useful life			16 years
Buildings
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives			39 years
Transportation Equipment, Furniture and Other Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives			3 years
Transportation Equipment, Furniture and Other Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives			15 years
Acquired Assets
Summary Of Significant Accounting Policies [Line Items]
Impairment of long-lived assets			$ 0	0	0
HCI
Summary Of Significant Accounting Policies [Line Items]
Net service revenue			35,288,000	35,203,000	32,457,000
Accountable Care Organizations | HCI
Summary Of Significant Accounting Policies [Line Items]
Net service revenue			$ 15,600,000	$ 12,100,000	$ 9,600,000