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Variable Interest Entities - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) Facility	Dec. 31, 2022 USD ($)
Variable Interest Entity [Line Items]
Consolidated assets	$ 5,346,218	$ 4,987,901
Consolidated liabilities	$ 2,536,074	2,086,917
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Number of facilities operated through non-wholly owned subsidiaries | Facility	10
Consolidated assets	$ 535,771	434,173
Consolidated liabilities	$ 25,489	$ 24,361
Variable Interest Entity, Primary Beneficiary [Member] | Minimum [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	65.00%
Variable Interest Entity, Primary Beneficiary [Member] | Maximum [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	87.00%

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