Leases (Schedule of Components of Lease Cost and Supplemental Cash Flow Information for Leases) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lease, Cost [Abstract]
Operating lease cost	$ 4,264
Short-term lease cost	135
Variable lease cost	576
Sublease income	(734)
Total lease cost	4,241
Cash paid for operating leases included in operating activities	4,115
Right-of-use assets obtained in exchange for operating lease liabilities	$ 23,886