Leases - Cost and Other information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Lease, Cost [Abstract]
Operating Lease, Cost	$ 831	$ 2,320
Sublease Income	(97)	(285)
Lease, Cost	734	2,035
Operating Lease, Payments	$ 843	$ 2,336
Operating Lease, Weighted Average Remaining Lease Term	7 years 4 months 24 days	7 years 4 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	3.10%	3.10%
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 342	$ 381
reductions to right of use assets resulting from reduction in lease obligations	$ (726)	$ (2,021)