Leases Operating Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Lease expense	$ 321	$ 315	$ 641	$ 629
Short-term leases	36	42	66	76
Sub-lease income	0	0	0	0
Lease cost	$ 357	$ 357	$ 707	$ 705