Leases - Lease Term and Discount Rate (Details)	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Weighted-average remaining lease term (in years): operating leases	10 years 6 months	10 years 10 months 24 days
Weighted-average remaining lease term (in years): finance leases	11 years 3 months 18 days	11 years 2 months 12 days
Weighted-average discount rate: operating leases	5.90%	6.20%
Weighted-average discount rate: finance leases	6.50%	7.10%