Leases (Lease Expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Operating leases expense	$ 3,119	$ 3,850	$ 3,819
Short-term leases expense	192	112	236
Payments on operating lease obligations	$ 2,967	$ 3,850	$ 3,819