Goodwill and Other Intangibles, Net - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021 USD ($) state	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) state
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment loss	$ 0	$ 0	$ 0
Disposal related to goodwill associated with closure of underperforming locations	20,000.00	500,000	600,000
Disposal related to intangible assets	$ 900,000	700,000	7,100,000
Intangible asset impairment			$ 6,100,000
Number of states with Medicare provider enrollments | state	4		4
Amortization expense	$ 1,500,000	$ 1,200,000	$ 1,300,000
Closure of Underperforming Locations
Indefinite-lived Intangible Assets [Line Items]
Disposal related to goodwill associated with closure of underperforming locations			$ 1,000,000
Certificate Of Need
Indefinite-lived Intangible Assets [Line Items]
Disposal related to intangible assets	$ 400,000
Trade name
Indefinite-lived Intangible Assets [Line Items]
Intangible asset estimated useful life	7 years 9 months 18 days	8 years 9 months 18 days
Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Intangible asset estimated useful life	16 years 3 months 18 days	17 years 3 months 18 days
Non-compete agreements
Indefinite-lived Intangible Assets [Line Items]
Intangible asset estimated useful life	4 years 10 months 24 days	2 years 10 months 24 days