Leases (Lease Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating leases expense	$ 775	$ 1,493
Short-term leases expense	43	82
Payments on operating lease obligations	$ 760	$ 1,524