Quarterly report pursuant to Section 13 or 15(d)

Leases - Additional Information (Details)

v3.19.1
Leases - Additional Information (Details) - Office Space and Commercial Property
$ in Thousands
 3 Months Ended
Mar. 31, 2019
USD ($)
Operating Leased Assets [Line Items]  
Lessee, operating lease, description These leases have terms which range from six 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 five 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 $ 254
Minimum  
Operating Leased Assets [Line Items]  
Lessee, operating lease, term of contract 6 years
Lessee, operating lease, terminate term 5 years
Lessee, operating lease, renewal term 3 years
Maximum  
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