Leases (Income Statement Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Short-term lease expense	$ 437	$ 267	$ 1,108	$ 753
Operating lease expense	2,062	1,650	6,512	3,618
Amortization of right of use asset	87	26	81	45
Interest expense on lease liabilities	190	32	621	72
Interest expense on lease liabilities		34
Sublease income	(12)	(10)	(28)	(58)
Net lease cost	$ 2,327	$ 1,700	$ 7,186	$ 3,677