Leases (Additional Information) (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Weighted-average remaining lease term	9 years 1 month 6 days
Weighted-average discount rate	2.80%
Operating Lease, Right-of-Use Asset	$ 48,491	$ 41,142
Operating lease liabilities	49,630	$ 42,042
Woodbridge, NJ
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	10,000
Operating lease liabilities	$ 10,000