Leases (Assets and Liabilities Balance Related to Finance and Operating Leases) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Finance lease right-of-use assets	$ 6,079	$ 6,280
Operating lease right-of-use assets	5,072	4,656
Finance lease obligations, current portion	396	400
Finance lease obligations, non-current portion	3,963	4,140
Total finance lease obligations	4,359	4,540
Operating lease obligations, current portion	2,401	2,343
Operating lease obligations, non-current portion	2,693	2,334
Total operating lease obligations	$ 5,094	$ 4,677