Leases (Schedule of lease assets and liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating right of use asset	$ 7,828	$ 5,673
Finance right of use assets	16,455	17,396
Total right of use assets	24,283	23,069
Current operating lease liability	4,666	3,430
Current finance lease liability	5,157	4,164
Operating lease liability	3,012	2,071
Finance lease liability	162	3,215
Total lease liability	$ 12,997	$ 12,880