Leases - Summary of Additional Lease Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lease Cost
Operating lease cost	$ 678
Short term lease cost	9
Total lease cost	687
Other information
Operating leases - operating cash flows	$ 682
Weighted average lease term - operating leases	11 years 2 months 19 days
Weighted average discount rate - operating leases	3.31%