Leases (Lease Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating leases expense	$ 843	$ 2,336
Short-term leases expense	68	150
Payments on operating lease obligations	$ 719	$ 2,243