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Leases - Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Leases [Abstract]    
Right of use assets, net $ 169,075 $ 167,233
Lease liabilities included in Accrued Liabilities and other 47,803 44,948
Lease liabilities included in Other long-term liabilities 126,695 128,173
Total lease liabilities $ 174,498 $ 173,121