Leases (Schedule of lease assets and liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating right of use asset	$ 6,406	$ 5,592
Finance right of use assets	0	7,281
Total right of use assets	6,406	12,873
Current operating lease liability	3,515	4,075
Current finance lease liability	0	3,216
Operating lease liability	2,856	1,445
Finance lease liability	0	0
Total lease liability	$ 6,371	$ 8,736