Other Current Assets - Other Current Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Prepaid expenses	$ 22,161	$ 23,708
Cost report receivable	14,402	13,723
Other receivables	14,257	16,097
Workers’ compensation deposits – current portion	10,000	10,000
Income taxes receivable	9,358	5,579
Insurance receivable – current portion	5,739	3,030
Inventory	4,882	4,759
Other	1,644	1,348
Other current assets	$ 82,443	$ 78,244