Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional Information (Details)

v3.20.2
Leases - Additional Information (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Office Space and Commercial Property    
Operating Leased Assets [Line Items]    
Lessee, operating lease, description These leases have terms which range from four to 19 years, and generally include one or more options to terminate or renew.  
Lessee, operating lease, option to terminate The termination options can reduce the lease term for periods ranging from two to 10 years  
Lessee, operating lease, option to extend The renewal terms can extend the lease term for additional periods ranging from three to five years.  
Operating lease cost for right - of - use assets $ 736 $ 760
Commercial Property    
Operating Leased Assets [Line Items]    
Sublease, term of contract 3 years  
Sublease income $ 26  
Minimum | Office Space and Commercial Property    
Operating Leased Assets [Line Items]    
Lessee, operating lease, term of contract 4 years  
Lessee, operating lease, terminate term 2 years  
Lessee, operating lease, renewal term 3 years  
Maximum | Office Space and Commercial Property    
Operating Leased Assets [Line Items]    
Lessee, operating lease, term of contract 19 years  
Lessee, operating lease, terminate term 10 years  
Lessee, operating lease, renewal term 5 years