Leases (Lease liability maturity) (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
2019	$ 2,963
2020	4,058
2021	4,174
2022	4,294
2023	4,417
Thereafter	18,134
Total future minimum lease payments	38,040
Less: discount	(6,881)
Total lease liability	$ 31,159