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Leases - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Dec. 31, 2018
Jan. 01, 2019
Lessee, Lease, Description [Line Items]        
Right-of-use assets $ 306,223 $ 306,223    
Lease liabilities 347,203 347,203    
Operating lease costs 35,400 104,700    
Short-term and variable lease costs $ 11,000 $ 31,000    
Rental expense     $ 127,100  
Maximum        
Lessee, Lease, Description [Line Items]        
Remaining lease term   13 years    
Renewal term 10 years 10 years    
Accounting Standards Update 2016-02        
Lessee, Lease, Description [Line Items]        
Right-of-use assets       $ 343,000
Lease liabilities       $ 390,000