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Leases - Schedule Of Leases On Condensed Consolidated Balance Sheet (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Lessee Lease Description [Line Items]    
Operating lease right-of-use assets $ 506,787  
Total 552,334  
Finance lease liabilities 7,210 $ 445
Operating lease liabilities 27,984  
Finance lease liabilities 44,445  
Operating lease liabilities 504,753  
Total 584,392  
Property and Equipment, Net [Member]    
Lessee Lease Description [Line Items]    
Finance lease right-of-use assets 45,547  
Operating Lease Right-of-use Assets [Member]    
Lessee Lease Description [Line Items]    
Operating lease right-of-use assets 506,787  
Other Accrued Liabilities [Member]    
Lessee Lease Description [Line Items]    
Finance lease liabilities 7,210  
Current Portion of Operating Lease Liabilities [Member]    
Lessee Lease Description [Line Items]    
Operating lease liabilities 27,984  
Other Liabilities [Member]    
Lessee Lease Description [Line Items]    
Finance lease liabilities 44,445  
Operating Lease Liabilities [Member]    
Lessee Lease Description [Line Items]    
Operating lease liabilities $ 504,753