Leases - Summary of Additional Lease Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lease Cost
Operating lease cost	$ 677	$ 1,355
Short term lease cost	8	17
Total lease cost	$ 685	1,372
Other information
Operating leases - operating cash flows		$ 1,348
Weighted average lease term - operating leases, in years	11 years 3 months 2 days	11 years 3 months 2 days
Weighted average discount rate - operating leases	3.32%	3.32%