Leases (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	3 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	3.70%
Current operating lease liabilities	$ 2,400
Operating Lease, Liability	7,746
Noncurrent operating lease liabilities	5,300
Operating Lease, Payments	1,800
Other Non-Current Assets [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 6,800