Discontinued Operations - Summary of Results Assets and Liabilities of Discontinued Operations (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Total current assets		$ 4,825
Total assets	1,586,252	446,361
Current liabilities:
Total current liabilities		3,682
Total liabilities	$ 494,656	421,591
Discontinued Operations
Current assets:
Cash and cash equivalents		3,917
Receivables		908
Total assets		4,825
Current liabilities:
Medical claims and related payables		1,293
Accounts payable and accrued expenses		2,389
Total current liabilities		3,682
Net assets		$ 1,143