Leases Lessee, Lease Terms and Discount Rates (Details)	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease Terms and Discount Rates [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	9 years 3 months 18 days	9 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	3.57%	3.66%
Finance Lease, Weighted Average Discount Rate, Percent	0.95%	2.26%