Leases - Future Minimum Lease Payments (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2019 (excluding the three months ended March 31, 2019)	$ 2,122
2020	2,705
2021	2,173
2022	2,202
2023	1,218
2024 and thereafter	2,814
Total minimum lease payments	13,234
Less imputed interest	(2,158)
Lease liability	11,076
Finance Lease Liabilities, Payments, Due [Abstract]
2019 (excluding the three months ended March 31, 2019)	257
2020	687
2021	451
2022	0
2023	0
2024 and thereafter	0
Total minimum lease payments	1,395
Less imputed interest	(98)
Lease liability	$ 1,297