Leases - Lease Terms and Discount Rates (Details)	Dec. 31, 2020	Dec. 31, 2019
Weighted average of the remaining lease term
Operating leases	7 years 9 months 18 days	10 years 3 months 18 days
Finance leases	41 years 2 months 12 days	30 years 2 months 19 days
Weighted average discount rate
Operating leases	4.59%	4.65%
Finance leases	6.89%	4.47%