Leases Operating Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Lease expense	$ 1,293	$ 1,273
Short-term leases	159	139
Sub-lease income	0	0
Lease cost	$ 1,452	$ 1,412