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Leases - Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Leases [Abstract]    
Right of use assets, net $ 166,728 $ 179,679
Lease liabilities included in Accrued Liabilities and other 43,219 43,025
Lease liabilities included in Other long-term liabilities 129,286 142,620
Total lease liabilities $ 172,505 $ 185,645
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent  
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent