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Leases - Schedule of Supplemental Balance Sheet Information Related to Operating Leases (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Leases [Abstract]      
Operating lease right-of-use assets $ 650,990 $ 656,000 $ 0
Operating lease obligation - short-term (recorded within “Other accrued liabilities”) $ 69,694    
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesCurrent    
Operating lease obligation - long-term $ 518,365   $ 0
Total operating lease liabilities $ 588,059 $ 580,000  
Weighted-average remaining lease term (years) 37 years    
Weighted-average discount rate (%) 7.00%