Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional Information (Detail)

v3.21.2
Leases - Additional Information (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Lessor, Lease, Description [Line Items]    
Total future estimated lease liability $ 105,500  
Average annual sublease income 292 $ 265
Arithmetic Average [Member]    
Lessor, Lease, Description [Line Items]    
Average annual sublease income $ 300