Leases - Operating ROU Assets and Lease Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jan. 01, 2019
Operating Leased Assets [Line Items]
ROU lease assets			$ 127,481	$ 157,234
Lease liabilities	$ 158,280	$ 174,396	$ 158,280	$ 178,802
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet
Minimum [Member]
Operating Leased Assets [Line Items]
Lease term	5 years
Maximum [Member]
Operating Leased Assets [Line Items]
Lease term	20 years