Leases (Schedule of Components of Lease Cost and Supplemental Cash Flow Information for Leases) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 1,073	$ 1,062	$ 2,119	$ 2,100
Short-term lease cost	9	45	13	91
Variable lease cost	148	155	286	245
Sublease income	(178)	(182)	(373)	(343)
Total lease cost	$ 1,052	$ 1,080	2,045	2,093
Cash paid for operating leases included in operating activities			2,052	2,023
Right-of-use assets obtained in exchange for operating lease liabilities			$ 1,540	$ 23,381