Leases (Operating leases) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Ending with April 1,
2020	$ 2,582
2021	1,409
2022	550
2023	12
2024	12
2025 and beyond	84
Total future payments	4,649
Less: Interest	328
Present value of future minimum operating lease payments	4,321
Less: current portion	(2,369)	$ 0
Operating lease liability	$ 1,952	$ 0