Leases (Schedule of Components of Lease Cost and Supplemental Cash Flow Information for Leases) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 1,073	$ 1,072	$ 3,192	$ 3,172
Short-term lease cost		30	13	121
Variable lease cost	140	175	426	420
Sublease income	(191)	(172)	(564)	(515)
Total lease cost	$ 1,022	$ 1,105	3,067	3,198
Cash paid for operating leases included in operating activities			3,091	3,057
Right-of-use assets obtained in exchange for operating lease liabilities			$ 1,789	$ 23,886