Quarterly report pursuant to Section 13 or 15(d)

Leases Future maturities of lease liabilities (Details)

v3.19.3
Leases Future maturities of lease liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Sep. 30, 2018
Leases [Abstract]        
Operating Leases, Future Minimum Payments Due, Next Twelve Months $ 20,119      
Lessee, Operating Lease, Liability, Payments, Due Year Two 76,258      
Lessee, Operating Lease, Liability, Payments, Due Year Three 68,625      
Lessee, Operating Lease, Liability, Payments, Due Year Four 63,532      
Lessee, Operating Lease, Liability, Payments, Due Year Five 58,579      
Finance Lease, Liability, Payments, Due after Year Five 212,496      
Finance Lease, Liability, Payment, Due 499,609      
Unrecorded Unconditional Purchase Obligation, Imputed Interest (70,338)      
Operating Lease, Liability 429,271      
Operating Lease, Liability, Current (62,756) $ (57,207) $ 0 $ 0
Operating Lease, Liability, Noncurrent $ 366,515 $ 329,865 $ 0 $ 0