Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional Information (Detail)

v3.20.1
Leases - Additional Information (Detail)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Jan. 01, 2019
USD ($)
lease
Lessee, Lease, Description [Line Items]        
Number of leases | lease       45
Right-of-use assets $ 36,100   $ 36,500  
Total lease liabilities - Operating leases 36,860   $ 37,200  
Net rental expenses $ 2,000 $ 1,900    
Weighted average remaining lease term 8 years 4 months 13 days   8 years 6 months 25 days  
Weighted average discount rate (percent) 3.21%      
Cash paid for amounts included in the measurement of Company's operating lease liabilities $ 1,900 $ 1,700    
ASU 2016-02        
Lessee, Lease, Description [Line Items]        
Right-of-use assets       $ 40,900
Total lease liabilities - Operating leases       $ 40,900
Minimum        
Lessee, Lease, Description [Line Items]        
Initial lease terms 2 years      
Lease renewal term 2 years      
Maximum        
Lessee, Lease, Description [Line Items]        
Initial lease terms 25 years      
Lease renewal term 12 years