Leases Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Leased Assets [Line Items]
Operating Lease, Right-of-Use Asset		$ 155,052	$ 157,234	$ 0	$ 0
Operating Lease, Liability	$ 28,722	$ 174,396	$ 178,802	$ 0	$ 0
Minimum [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Term of Contract	5 years
Maximum [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Term of Contract	20 years