Leases Leases, maturities of operating leases (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 3,999
Lessee, Operating Lease, Liability, Payments, Due Year Two	750
Lessee, Operating Lease, Liability, Payments, Due Year Three	734
Lessee, Operating Lease, Liability, Payments, Due Year Four	667
Lessee, Operating Lease, Liability, Payments, Due Year Five	411
Lessee, Operating Lease, Liability, Payments, Due after Year Five	5,755
Lessee, Operating Lease, Liability, Payments, Due	12,316
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	3,188
Operating Lease, Liability	9,128
Current portion of operating lease liability	3,695	$ 0
Operating lease liabilities, net of current portion	$ 5,433	$ 0