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Leases Maturities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Maturities [Abstract]    
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year $ 109,753  
Lessee, Operating Lease, Liability, Payments, Due Year Two 138,789  
Lessee, Operating Lease, Liability, Payments, Due Year Three 115,046  
Lessee, Operating Lease, Liability, Payments, Due Year Four 112,981  
Lessee, Operating Lease, Liability, Payments, Due Year Five 111,604  
Lessee, Operating Lease, Liability, Payments, Due after Year Five 1,375,942  
Lessee, Operating Lease, Liability, Payments, Due 1,964,115  
Operating Lease, Imputed Interest (980,717)  
Operating Lease, Liability, Current (63,815) $ 0
Operating Lease, Liability $ 919,583