Leases - Supplemental Balance Sheet and Other Information (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Finance Lease, Right-of-Use Asset	$ 121,887	$ 129,301
Operating leases:
Operating Lease, Liability	$ 142,016	$ 145,354
Weighted average remaining lease term (in years)	5 years 10 months 24 days	6 years 1 month 6 days
Weighted average discount rate	2.61%	2.82%