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Restructuring Expenses - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Restructuring Cost And Reserve [Line Items]          
Restructuring costs $ 38,300 $ 38,338
Contract Termination          
Restructuring Cost And Reserve [Line Items]          
Restructuring and related cost incurred       5,300  
Restructuring of contractual future payments $ 14,000     $ 14,000