Variable interest entities - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Total assets	$ 16,928,740	$ 16,928,252
Total liabilities and noncontrolling interests	14,104,061	$ 14,703,452
Variable Interest Entity
Total assets	284,761
Total liabilities and noncontrolling interests	$ 160,526