Leases (Lease Expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating leases expense	$ 3,257	$ 3,119	$ 3,850
Short-term leases expense	464	192	112
Payments on operating lease obligations	$ 2,893	$ 2,967	$ 3,850