Leases - Schedule of Weighted-Average Remaining Lease Term and Discount Rate for Operating and Finance Leases (Detail)	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating leases, Weighted-average remaining lease term	10 years 4 months 24 days	7 years 3 months 18 days
Finance leases, Weighted-average remaining lease term	2 years 10 months 24 days	2 years 9 months 18 days
Operating leases, Weighted-average discount rate	3.20%	3.40%
Finance leases, Weighted-average discount rate	3.50%	4.40%