Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional Information (Detail)

v3.21.2
Leases - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Lessee, Lease, Description [Line Items]          
Right-of-use assets $ 47,400   $ 47,400   $ 52,200
Total lease liabilities - Operating leases $ 50,434   $ 50,434   $ 54,000
Operating Lease, Liability, Statement of Financial Position [Extensible List] Accrued expenses and other liabilities   Accrued expenses and other liabilities   Accrued expenses and other liabilities
Weighted average remaining lease term 8 years 4 months 20 days   8 years 4 months 20 days   8 years 9 months
Weighted average discount rate (percent) 2.42%   2.42%   2.43%
Net lease expense $ 2,000 $ 2,000 $ 4,100 $ 4,100  
Operating lease costs 1,900 1,900 3,900 3,900  
Cash paid for amounts included in the measurement of Company's operating lease liabilities $ 1,900 $ 1,900 $ 3,900 $ 3,900  
Minimum          
Lessee, Lease, Description [Line Items]          
Operating lease remaining term 1 year   1 year    
Finance lease remaining term 1 year   1 year    
Maximum [Member]          
Lessee, Lease, Description [Line Items]          
Operating lease remaining term 13 years   13 years    
Finance lease remaining term 13 years   13 years    
Operating lease extension term 5 years   5 years    
Finance lease extension term 5 years   5 years