Leases Leases (ASC 840), maturities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 1,535
Operating Leases, Rent Expense, Net	2,000	$ 1,900
Operating Leases, Future Minimum Payments, Due in Two Years	1,042
Operating Leases, Future Minimum Payments, Due in Three Years	833
Operating Leases, Future Minimum Payments, Due in Four Years	805
Operating Leases, Future Minimum Payments, Due in Five Years	745
Operating Leases, Future Minimum Payments, Due Thereafter	6,795
Operating Leases, Future Minimum Payments Due	$ 11,755