Leases (Maturities of Operating Lease Liabilities) (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating lease payments due in 2019	$ 20,271
Operating lease payments due in 2020	103,515
Operating lease payments due in 2021	86,245
Operating lease payments due in 2022	71,147
Operating lease payments due in 2023	62,384
Operating lease payments due thereafter	358,758
Leases, operating lease, liability, payments, due, total	702,320
Less: Imputed interest	(161,338)
Total operating lease liability	$ 540,982