Leases - Summary of Weighted-average Remaining Lease Terms and Discount Rates (Detail)	Dec. 31, 2020	Dec. 31, 2019
Weighted-average remaining lease terms (years):
Operating leases	13 years 10 months 24 days	14 years 6 months
Finance leases	14 years 3 months 18 days	9 years
Weighted-average discount rates:
Operating leases	4.20%	4.30%
Finance leases	3.30%	5.20%