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Variable Interest Entities - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) Facility	Dec. 31, 2023 USD ($)
Variable Interest Entity [Line Items]
Consolidated assets	$ 5,517,247	$ 5,358,841
Consolidated liabilities	$ 2,541,892	2,471,181
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Number of facilities operated through non-wholly owned subsidiaries | Facility	10
Consolidated assets	$ 650,134	597,844
Consolidated liabilities	$ 29,184	$ 26,962
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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