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Leases - Additional Information (Detail)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Lease
Jun. 30, 2020
USD ($)
Lessee Lease Description [Line Items]        
Operating leases expiration date     2032  
Number of subleases | Lease     1  
Sublease income | $ [1] $ 335 $ 563 $ 834 $ 1,351
Minimum [Member]        
Lessee Lease Description [Line Items]        
Lease term range, years 5 years   5 years  
Number of renewal options for extended terms 1 year   1 year  
Operating sublease term     23 months  
Maximum [Member]        
Lessee Lease Description [Line Items]        
Lease term range, years 10 years   10 years  
Number of renewal options for extended terms 4 years   4 years  
[1] Lease expense and sublease income represent the amount recorded within our unaudited condensed consolidated statements of income. Variable lease amounts represent expenses recognized as incurred which are not included in the lease liability. Fixed lease expenses and sublease income are recorded on a straight-line basis over the lease term and therefore are not necessarily representative of cash payments during the same period.