Summary of Net Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Net Intangible Assets	$ 82,586	$ 83,657
Medicare Licenses
Finite Lived Intangible Assets [Line Items]
Net Intangible Assets	57,226	57,226
Certificates of Need
Finite Lived Intangible Assets [Line Items]
Net Intangible Assets	8,253	8,267
Contract Relationships and Other
Finite Lived Intangible Assets [Line Items]
Net Intangible Assets	$ 17,107	$ 18,164