- Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 927	$ 899	$ 2,838	$ 2,762
Short-term lease cost	52	73	148	206
Depreciation of leased assets	111	131	329	395
Interest on lease liabilities	123	129	374	392
Total finance lease cost	234	260	703	787
Total lease cost	$ 1,213	$ 1,232	$ 3,689	$ 3,755